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Publication numberUS3298030 A
Publication typeGrant
Publication dateJan 10, 1967
Filing dateJul 12, 1965
Priority dateJul 12, 1965
Publication numberUS 3298030 A, US 3298030A, US-A-3298030, US3298030 A, US3298030A
InventorsJr Arling Dix Brown, Arthur M Lewis
Original AssigneeClevite Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrically operated character printer
US 3298030 A
Images(3)
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Description  (OCR text may contain errors)

Jan. 10, 1967 A; M. LEWIS ETAL 3,298,030

5 ELECTRICALLY OPERATED CHARACTER PRINTER FiledJu ly 12, 1965 v 5 Sheets-Sheet 1 9 2o CHARACTER V Fumcnom vAmABLE DATA GEN. PHABE. i

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FROMTRANSMITFER TO TUNNEL 55 l F T|Tb ,|TcU ,2 ,27

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' DRIVE FREQ STAGE DIWDER //\/|/N7O/?5 I 2 ra/ ARTHUR M. LEW/.5

AWL/N6 DIX BROWM .14, BY

gawk? (1m Jan. 10, 1967 4 M. LEWJS ETAL 3,298,030

ELECTRICALLY OPERATED CHA'fiACTER PRINTER Filed July 12, 1965 3 Sheets-Sheet 2 TO 50 KG 050. 27

EMGNAL. SOURCE (AMPQ) CONTROL STAGE cARmAeE 1 35 DosmoNmo MOTOR 22 52X DRIVE STAGE.

VTo H 3 Sheets-Sheet 5 TO INK ITO n BM ELECTRODE GEN.

' FUNCHON CHARACTER DATA TRANSMHTER A.M.-LEWIS ETAL ELECTRICALLY OPERATED CHARACTER PRINTER Filed July 12, 1965 v To H ' To cHe'e TUNNEL ZOO KC 0 50.

Jan. 10, 1967 V sPAQE lNVENTO/2S ARTHL/l? M. LEW/5 A/eL/A/e D/X Bleow/v, JR;

A 7TO/2/VEY United States Patent Ofiice 3,298,030 ELECTRICALLY OPERATED CHARACTER PRINTER Arthur M. Lewis, Shaker Heights, and Arling Dix Brown,

Jr., Cleveland Heights, Ohio, assignors to Clevite Corporation, a corporation of Ohio Filed July 12, 1965, Ser. No. 471,259 18 Claims. (Cl. 346-75) This application is a continuation-in-part of application Serial No. 425,164, filed January 13, 1965, and now abandoned which is in turn a continuation-in-part of application Serial No. 399,291, filed On September 25, 1964, and now abandoned. The invention relates to improved apparatus for electric signal responsive printing of predetermined characters, for example, substantially duplicating an alphanumeric or pictorial record, upon a recording or receiving medium. More particularly, the invention relates to apparatus for print-out of characters, or to set type or resist (e.g. photo-resist or chemical-resist) areas upon a recording or receiving medium through electrostatic charge control of appropriately spaced discrete drops of a marking fluid which might be ordinary ink.

In the prior art, for example in US. Patent 2,512,743 issued June 27, 1950, to Hansell, it has been known to set up a fluid pressure in a liquid thus to cause non-uniform droplets to issue from a nozzle and impinge upon a receiving surface. Such systems While having adequate accuracy for hand painting (air brush work) have the disadvantage that because the non-uniformity of the drops as formed makes them not well adapted for automatic, electrically controlled, print-out of legible characters. Thus, such a system not only introduces inaccuracies but also its speed of operation is uneconomic for many applications.

In Electronic Design magazine for October 11, 1963, an article entitled Fast Oscillograph Squirts Ink suggests a nozzle vibrated at 120 kc. and a DC. transverse field acting upon droplets which, in effect, are individually charged and, according to the article, uniform in size and spacing, and capable of recording a sample of an electrical (e.g. sine wave) analogous signal input. Here again there exist limitations of accuracy, and of speed or frequency of response; also, mechanical equipment is employed with unsuitable space and maintenance requirements as well as with limited applicability to alphanumeric or facsimile readout.

It is an object of the present invention to provide simple means for overcoming the above-mentioned difliculties.

Another object is to provide, in a drop writing apparatus of a type adapted, for example, to squirt ink upon paper while breaking the ink into discrete and uniform drops, improved means for insuring uniformity of drop size and spacing and means which permits a tolerance as regards the relation between drop charge and drop time of arrival as hereinafter more fully explained.

A further object of the invention is the provision of novel means for controlling the uniformity of a plurality of ink drops and the charging of each drop in accordance with input signals.

Other objects and advantages will become apparent and the invention may be better understood from consideration of the following description taken in connection with the accompanying drawings in which:

FIGURE 1 is a schematic and partial diagram of apparatus according to one aspect of the invention;

FIGURE 2 is a part sectional view showing a portion of the apparatus of FIGURE 1. In FIGURE 2, a nozzle portion 15 is shown enlarged in relation to other parts, for the purpose of clarity.

FIGURE 2(a) is a simplified block diagram of the embodiment shown in FIGURES 1 and 2;

3,298,030 Patented Jan. 10, 1967 FIGURE 3 shows a modification of the embodiment of the invention;

FIGURE 4 is a diagram showing electrical signal steps useful for forming a single letter accordin to one way of accomplishing the so-called matrix embodiment of FIGURES 1, 2, and 3; and

FIGURE 5 shows a modified form of apparatus for illustrating application of many of the present invention principles to a fascimile system.

Referring first to FIGURE 1, there is shown a character data transmitter 9, which supplies character data to a function generator 11 through a signal line 10. The data received by the generator 11 is generally in the form of groups of signals or pulses, each group corresponding to a particular character to be recorded. The signals of each group are converted by the function generator into related output signals, each of which is supplied to an amplifier 12. The output of the amplifier is connected through output lines 13, 14 to the ink within and issuing from a conduit 15 in order to charge drops of the ink in a manner hereafter more fully explained in connection with FIGURE 2.

As shown in FIGURE 1, a high frequency source 27, such as a 50 kc. oscillator, energizes a transducer =18 through connections 16 and 17, and the output of the oscillator 27 is connected by a line 19 to a variable phase shifter 20 which controls the time relationship between the signals from the function generator 11 which control the drop charging, and the signals applied to the transducer 18.

A pair of electrically charged deflection plates 21, 22, respectively, establish a field which serves to differentially deflect ink drops, which are differentially charged, while they are in transit toward a recording medium. As illustrated in FIGURES 1 and 2, the recording medium is assumed to be a paper tape 23 moved, as in the direction indicated by arrow 24, along a supporting base 25. The motion is provided by a recording medium drive stage 23x, which .moves the tape at a rate which is related to the rate at which ink drops are deposited on the tape, so that the proper characters are recorded thereon. Base 25 is provided with an ink dump or catcher funnel or pipe end 26 for the purpose of receiving ink which is dumped, rather than allowed to come to rest upon the recording medium, as also explained hereafter.

A grounded center tapped source of relatively high voltage DC, for simplicity shown as a 6000 volt battery 28 in FIGURE 1, is used to oppositely charge the deflecting plates 21, 22 through connections 29, 30.

In other drawing figures, like structures bear the same reference numerals as are used in FIGURE 1. In FIG- URE 2, there is additionally shown a marking liquid reservoir 31 containing an electrically conductive marking liquid such as ordinary ink 32. The ink in the reservoir is pressurized as by introducing compressed air through a conduit 33.

If the ink supply conduit and reservoir are of electrically insulating material, such as glass, then an inner electrode 34 is provided within the conduit (or alternatively within the reservoir). Optionally, if either conduit 15 or the reservoir 31 itself is conductive, then a signal line maybe connected to the conduit or container itself. The other signal line 14 is connected to a charging tunnel 35.

The function of the charging tunnel 35 is to respond to each signal from the function generator 11 (FIGURE 1) and induce a charge in each of the ink drops formed thereat. The charge induced in each drop is proportional to the input signal which is applied to the tunnel as the drop passes therethnough. Thus, each ink drop that leaves the charging tunnel carries with it a charge which is proportional to the input signal at the instant the drop was formed and passed through the tunnel. Since the signals applied to the tunnel the transmitter, the charge of each drop is similarly related thereto. Since the drops are of uniform size, the resulting charge-to-mass ratio is proportional to the input signals. As these charged drops pass between the electrodes 21 and 22, they are subjected to an electrostatic transverse field which modi-fies'the path of each drop proportion-ally to its charge. Thus, the position of the mark made by each ink drop on the recording medium is related to. the particular input signal supplied to the tunnel '35 as the particular drop passes therethrough. By controlling the charges applied to a plurality of ink drops (as a function of a set of input signals from the transmitter), a particular character, such as the E shown in FIGURE 2, may be recorded. i

In accordance with a preferred embodiment of the invention, and as will now be described in connection are related to the signals from with FIGURE 2, conduit 15 terminates in a nozzle por- I tion 15' with which there is associated the coaxial transducer 18, being preferably an electrically energizable piezoelectric device which surrounds the ink. We prefer that the piezoelectric device be a tube of a polarized ceramic 38 having suitable electrodes 36, 37. The ceramic may be a polarized barium titanate as disclosed and claimed in US. Patent 2,486,560 issued on an application of Gray, or the ceramic material may be a polarized lead zirconate lead titanate, which is also known. Both are commercially available as piezoelectric devices having a cylindrical form and provided with an outer cylindrical electrode 36, and a concentric inner cylindrical electrode 37 with ceramic 38 extending between the electrodes. Electrical oscillations applied (as shown through connections 16, 17) to the inner and outer electrodes across the ceramic layer 38, produce radial mechanical vibrations thereof. These vibrations are transmitted to the conduit 15 which is coaxially aligned with, and mechanically coupled to, the transducer 18 near the nozzle 15'. The nozzle 15', due to the variable pressures applied at 33, will cause the ink flowing therethrough to break up into droplets. The coaxial transducer which produces the mechanical vibrations cooperates with the conduit 15 and nozzle 15' to assure that the ink drops are of uniform size and uniformly spaced. The drop formation frequency may be controlled to be the same as the frequency of the electrical oscillations of the piezoelectric transducer 18.

' Good results have been obtained using piezo ceramic and nozzle dimensions as follows:

Inches Effective ceramic and electrode length .250 Ceramic (38) OD. .125 Ceramic (38) ID. .085 Glass nozzle (15') OD. .070 Nozzle I.D. before taper .013 Nozzle exit orifice dia. .001

Glass as a material for the nozzle is not essential, but glass can be conveniently formed (drawn down or melted down) to form the nozzle orifice. Since the oscillations move the glass so slightly, the glass does not shatter in this application. The use of glass provides a convenient way of isolating drop charge signal circuitry from oscillatory circuitry, although other circuit isolating means (e.g., a transformer coupling in one circuit) could be used instead if it is desired to pass ink directly through theinner electrode of the piezo device to achieve the closest possible mechanical coupling between the piezo device and the ink.

From the foregoing description, it should be appreciated that inv order to satisfactorily record each character on the recording medium 23 (FIGURE 2), such as the character E, it is necessary to synchronize the oscillator 27 and the function generator 11 so that each drop is of uniform size with precise spacing between drops and that each drop is charged at the proper time while passing through tunnel 35 (FIGURE 2). Also, it is necessary to synchronize the motion of the tape 23 with the operations of oscillator 27 and generator 11 in order to insure that successively charged drops are deposited unto the tape 23 at the proper locations as the tape is being moved by the driver stage 230: (FIGURE 1).

The synchronization of the operations of oscillator 27 and function generator 11 is accomplished by the adjustable variable phase shifter 20, shown in FIGURE 1 connected between the oscillator 27 and the generator 11. The particular circuitry incorporated in the phase shifter 20 depends on the mode of operation of the generator 11 in producingthe required signals to be supplied to the charging tunnel 35. In one embodiment of the invention as block diagrammed in FIGURE 2(a), to which reference is made herein, the variable phase shifter 20 is assumed to comprise a variable delay line disposed between the oscillator 27 and generator 11. The generator 11 is assumed to comprise a digital-to-analog converter 11a which receives groups of digital signals from transmitter 9 and converts them to related analog signals, supplied to a control output stage 11b. The latter stage is also provided with the output of the variable delay line from phase shifter 20 which delays the signal from oscillator 27. By adjusting the delay introduced by line 20 in the signal of oscillator 27, the output of the generator 11 is controlled so that the signals from the oscillator 27 to piezo device 18 (FIGURE 2) and the signals from the generator 11 (through amplifier 12) to the charging tunnel 35 are in proper time relationship to properly charge each ink drop passing through the tunnel 35.

The phase shifter 20 may also include a differentiating circuit (not shown) which can be used to convert the delayed signal from oscillator 27 into a delayed series of pulses which can in turn be used to control the output of the generator 11. Also, the synchronization of the signals supplied to the piezo device 18 (from oscillator 27) and to the charging tunnel 35 (from generator 11) can be accomplished by connecting the variable delay line of phase shifter 20 between the oscillator 27 and the piezo device 18. By varying the delay of the signal from oscillator 27 supplied to the device 18, an optimum delay can be selected to insure proper charging of each of the ink drops passing through the tunnel 35. As another alternative, proper signal synchronization may be accomplished by mechanically adjusting the position of the nozzle 15' with respect to tunnel 35, to achieve proper drop charging.

The novel system of the present invention diagrammed in FIGURES 1 and 2 may be more fully explained in conjunction with FIGURE 4 which represents one example of the output of function generator 11. The output comprises a plural step wave form shape 41 produced in response to a set of signals from character data transmitter 9. Referring back to FIGURE I, assume that the transmitter 9 is to provide the system with signals so that the ultimate print-out will constitute he words I READ YOU. Therefore, for an individual character, such as the E, the transmitter 9 provides the generator 11 (through line 10) a set of digital pulses characteristic of an E. The technique of providing sets of digital pulses which are characteristic of predetermined characters is well known to those familiar with the art, and therefore need not be described in detail. For example, such techniques are employed in presently known character generators or in computer'readout stages where characters recorded on tape or magnetic core memory as pulse signals are read out by the computer readout stage and are then printed by a typewriter or high speed drum printer. A set of digital pulses representative of the letter B requires the pulses be provided for charging and thus positioning each drop which makes up the letter B.

Digital signals, characteristic of the E, are supplied to the function generator 11 which converts them into related analog signals such as voltage signals of varying 5, amplitudes, as diagrammed by the plural step waveform shape 41 (FIGURE 4). The voltage level or amplitude of the output of generator 11 rises in a series of abrupt levels 1 through 7 in response to the digital signals, thereby to produce on the recording medium, a full set of ink drops in a more or less vertical column I. The column is indicated by the solid line waveform 41 at I in FIGURE 4, and by the full column I of ink drops in FIGURE 1. i

It shoud be appreciated by those familiar with the art that the waveform at I in FIGURE 4 is a staircase type waveform which is produceable by presently known techniques and circuits. For example, such a waveform is often available as an analog output of digital counters which respond to digital pulses or signals. As an illustration, see Patent No. 2,958,828.

As shown in FIGURE 2(a), in one embodiment, the function generator 11 incorporates a D/A converter 11a. The converter may comprise a multibit unit similar to a multibit register used in digital computers, with each unit connected to the transmitter 9. At each instant a group of signals may be simultaneously supplied to the converter which produces an analog output related thereto. Thus, by varying the signals supplied to the converter 11a, the analog output thereof is controlled.

It should be appreciated that for each of the drops produced in the tunnel 35 (FIGURE 2) the function generator 11 produces a related output voltage so that the drop is either deflected to the catcher 26 (FIGURE 2) or is deflected unto the recording medium to form a part of a desired character. To form column I, the transmitter supplies a group of signals for each successive drop so that the seven drops are deposited as a straight column on medium 23. Then for the next column II of the character matrix, the transmitter provides a group of signals which produce an output voltage represented by a solid ine 41x at level 1 so that a drop 42 (see FIGURE 4) is deposited on the recording medium. During the formation of the succeeding two drops, the signals from the transmitter cause the function generator to produce an output voltage represented by D in FIGURE 4. The magnitude of the voltage is suflicient to deflect the two drops to the catcher 26 so that they do not form a part of the character E.

A subsequent output voltage 41y deflects the next drop 43 to the fourth row of the character. Then, the voltage is again controlled to deflect the next two drops to the catcher 26 with a voltage 412 being subsequently provided to deflect a subsequent drop 44 to form a part of the E at the 7th row of the column II. In such a manner, the apparatus records each character by controlling the voltage produced by the function generator 11 as each drop is created in the tunnel 35, so that only drops which are to form a part of the character are properly deflected unto the tape, with all the rest of the drops being deflected to the catcher 26.

The particular circuitry incorporated in function generator 11 is dependent on the type of signals corresponding to different characters, which are supplied by the transmitter 9 to the generator 11. Therefore, it should be appreciated that the foregoing description of the generator which is assumed to convert digital signals to related analog signals, is exemplary of the teachings of the invention. Other arrangements, such as switching circuits, may be employed to convert each set of signals from the transmitter into related signals which are then used to energize tunnel 35 to deflect groups of drops so that particular characters are recorded on medium 23.

Alternatively, it is possible to construct and use a function generator so that selected drops of the series of drops produced while printing a particular character are directed to various levels of the character according to a sequence other than the stair-step scanning sequence illustrated in FIGURE 4. Such an alternative arrangement might be used so as to waste fewer ink drops in the dump.

From the foregoing, it is thus seen that the signals from the transmitter 9 corresponding to an E are converted by function generator 11 into a related set of analog signals which are used to deflect a plurality of ink drops so that an E is recorded on the medium 23 (see FIGURE 2). It should be appreciated that as the ink drops are deposited on the recording medium 23, the medium is moved by the drive stage 23x. Thus it is necessary to synchronize the motion of the medium 23 with the rate of deposition of the drops so that as each column is recorded (such as column I by depositing seven drops), the medium 23 is moved by a distance suflicient to deposit another group of drops to form an adjacent column, such as column II, comprising of three drops.

The synchronization may be accomplished by connecting the output of oscillator 27 (see FIGURE 2(a)) to the drive stage 23x so that the frequency of the oscillator which controls the rate at which ink drops are produced is also used to control the motion of the recording medium 23. The frequency of the oscillator 27 supplied to the drive stage 23x may 'be divided by a frequency divider 27x disposed therebetween in order to insure that the frequency of the signal supplied to stage 23x properly controls the motion of the recording medium 23 with respect to the rate at which ink drops are produced.

In FIGURE 3, like parts are like numbered as before but, in order to achieve a much greater speed of print-out, and also to take full advantage of the very small size of nozzle and uniform drop control arrangements according to the present invention, there are shown plural combinations of nozzle means 15', piezo devices 18, deflecting plates 21, 22, all substantially alike. Many of the connections are, as shown, electrically in parallel for the various nozzles assemblies, but individual diverting catchers and individual drop charging means (including connections to ink electrode 34- and charging tunnel 35 which are not shown in FIGURE 3) are provided separately for each nozzle assembly, and the recording medium instead of being a relatively narrow tape (as in FIGURES 1 and 2) is a wide sheet of paper of which only a portion is shown at 23 in FIGURE 3.

The embodiments of the invention diagrammed in FIGURE 3 includes a character data transmitter 40' consisting of a plurality of stages each one of which performs in a manner similar to that described in conjunction with transmitter 9 (see FIGURE 1). The transmitter 40 may furnish simultaneously signals to a plurality of function generators, each one of which is operated to produce signals corresponding to another character to be recorded. Thus for example, the characters of the word NOW can be simultaneously recorded by using a signal line IO to feed one function generator 11 and in turn, ink electrode and charging tunnel through connections 13 14 respectively, while other signal lines 10, 10, etc., simultaneously feed other function generators (not shown in FIGURE 3) and other charging tunnels and other ink electrodes. It will be observed, too, that whereas in FIGURES 1-2 a single dump catcher 26 was located beside and somewhat below the level of the paper strip 23, in FIGURE 3 plural dump troughs 26, etc., are located above the paper 23. In each case, the catchers form intercepting means displaced from the recording medium and for intercepting drops and preventing them from reaching the recording medium.

Many of the principles of the present invention disclosure, which includes the subcombination of an electrically energizable piezoelectric device coaxially surrounding the ink associated with the nozzle, may be used without utilizing the matrix concept. The various elernents used to form the plurality of ink drops and for charging each drop (i.e. elements 15, 18 and 35) may be mounted on a carriage 50 shown in FIGURE 5 to which reference is made herein. The carriage which also supports the deflecting plates 21 and 22 and an intercepting trough 26 is supported on a guideway 51 which is mounted adjacent a revolving cylinder or drum 52. The drum 7. supports a recording medium 23", mounted thereon. A drive stage 52x used to control the rotation of the drum 52 in the direction of arrow 24 is coupled to a control stage 60 to which the various drop forming and charging elements (15, 18, 35) and the deflecting plates 21 and 22 are also connected. In addition, a carriage positioning motor 50x, used to control the position of the carriage along the guideway 51, is also connected to the control stage 60.

The function of stage 60 is to control the rotational motion of the drum 52, the linear motion of carriage 50 and the supply of the signals from the function generator 11 and oscillator 27 so that each character is properly recorded unto the recording medium 23". The arrangement shown in FIGURE which hereafter will be referred to as a facsimile system may be operated so that each line of recorded characters is either circumferentially oriented with respect to drum 52, or is axially oriented with respect thereto.

In operation (see FIGURE 2), the ink under pressure (e.g. at 25 psi.) issuing from the small diameter (e.g. 001") nozzle orifice is first a continuous stream but soon separates into drops while the constant frequency oscillations control the uniformity of the size and of the spacing of the drops. Appropriate pressure and nozzle diameters can be used so that the drop frequency can be controlled even at frequencies as low as 5 kc. and at frequencies at least as high as 200 kc. The relationship of stream velocity, nozzle diameter and natural break-up frequency is already known from the published literature of the past eighty-six years. The break-up can be controlled over a frequency range greater than an octave about such natural frequency. In operation, good results have been obtained with an ink drop velocity in the range of 100 to 1000 inches per second using nozzle exit diameters from .001" to .002". Meanwhile, a transport means (shown for example in FIGURE 5) drives a recording medium such as paper across the ink drop whereby ink drops may normally impinge on different portions along said recording medium (for FIGURE 1 that would be rightwardly along the paper tape 25 as it moves to the left) with speed of transport correlated to speed of drop formation to achieve proper width of letters while avoiding piling up excess ink at any one spot.

An intercepting (or trough or catcher) means is displaced from the normal ink drop path and displaced from the recording medium, and an electrostatic charging and deflecting means deflect drops from an otherwise normal or general path (for either the matrix or the facsimile embodiment) so that drops can be controlled alternatively to be intercepted as in the catcher or to impinge predeterminedly across the recording medium; that would be horizontally as viewed in FIGURES 2 and 3, and vertically in FIGURE 1 (though the printed characters may appear otherwise because of movement during the sweep). In operation, good results have been obtained with characters .08" high having a nominal width of .03" (between character centers) at a print-out speed of 1200 characters per second.

Of course, with a plurality of n nozzle assemblies, as in FIGURE 3, the print-out can be almost n times as fast as the arrangement just described, a decided advantage when there is to be an abundance of text printed in the shortest possible time.

Besides speed, an advantage of the arrangements described is that the drops are precisely under control, and, for the function generator and matrix embodiments particularly, any signal complexity other than at the receiving end of a transmission line is obviated, and (with a staircase generator or many other possible function generator arrangements) even in the receiving end apparatus there is a tolerance, and time of arrival of a drop in the deflecting plate region that can vary a few microseconds one way or the other and the charge on the drop will still be correct because of the length of each plateau or step of the stepped ramp voltage, the electrostatic deflection 8 thus being better able to achieve control of which one of, say, eight levels (seven matrix levels plus a dump level) a particular drop is to be placed at while the paper motion spreads the drops along the transverse dimension of the letter. Further, two drops need never be intended for the same place on the paper; hence (since the parts are preferably arranged so that the ink stream maintains its continuity until well within the tunnel and then almost within the influence of the deflecting plates) distortion due to repulsion of like charged drops following a like path is substantially obviated.

Controlling the drop charge required only a modest potential (up to volts peak) between the charging tunnel and ink stream electrode. The subsequent deflection is accomplished with only a DC. high potential (1 to 10 kv.) on the deflection plates.

With an embodiment using the cylindrical mode coaxial piezo device only a very, very small amount of constant frequency power is required for assuring optimum drop spacing. There is a further advantage in that the cylindrical device permits a substantial reduction in size (over ink drop apparatus heretofore known), thus making possible an arrangement like FIGURE 3 (side by side jet assemblies) and optimizing an arrangement like FIG- URE 5 (moving jet assembly). Additionally, the small mass cylindrical transducer permits making a nozzle assembly which is simple and which can operate at a wider range of frequencies than uniform ink drop formation apparatus heretofore, thus permitting higher speed printout, or lower speed operation (e.g. lower signal frequency than heretofore) should that be desired, in order to adapt to some printing requirement with reliability.

While we have illustrated and described particular embodiments, various modifications may obviously be made. Thus, for example, apparatus according to aspects of the invention might be used as a toner with various lengths of signal off (dump) or signal on (print level) signals. Another modification could combine features of FIGURES 1-4 with those of FIGURE 5 and provide a facsimile system incorporating a sweep or scan to analogous places on (as well as to the dump off of) the recording medium according to an input (as from a function generator) thus to achieve greater speed or print-out than would be the case for the on-off system of FIGURE 5 where it is assumed that the only purpose of the lateral scan is to turn the ink on or off so far as reaching the recording paper 23" is concerned. In any event, the true spirit and scope of the invention is intended to be defined only by the appended claims taken with all reasonable equivalents.

As used herein, and in the claims hereafter, we intend the words marking fluid, marking liquid and ink to cover any organic or inorganic material which is in liquid form and is capable of taking a charge. Thus, the words are intended to cover inks, paints, alcohol (usable to put an invisible record on a paper sooner or later heat or chemical sensitized), an acid (or other) etch material,

mercury or other metal in the liquid phase, plastic rendered semiconductive (as by addition of carbon particles) and liquified with a fast drying solvent to provide photo or chemical-resist area for later printing, or any coating composition originally in the form of a liquid and which dries or otherwise sets up to provide a visible or invisible record, mask, type face, or circuit. When we use the words recording medium we do not intend to be limited to the paper of the specific examples, for obviously the medium might be a plastic, or glass, cloth, metal or other material. When we use the words characters or print-out in the title, in the specification, and in the claims, We do not mean to be limited to letters and numerals, since the print-out might be of non-alphanumeric design, in the form of pictures, printed circuitry (e.g. formed by superposed layers of drops) or image reversed (or not reversed) intaglio, offset or raised type, or resist areas, for further processing.

In addition, the word character or characters is meant to include other non-alphanumeric designs such as waveforms and various geometric configurations. From the foregoing description, it is seen that the system operates in a go-no go mode in that each drop is either deposited on the recording medium or deflected to the catcher. Thus, each drop is individually controlled independently of any other drop. Also, by controlling the motion' of the recording medium with respect to the rate at which the drops are formed as well as controlling the deflecting voltages applied to each drop, a particular design is created. The arrangement of FIGURE is especially adapted to produce non-alphanumeric designs since in addition to the controllable variable herebefore described, the carriage 50 is movable on guideway 51 with respect to the recording medium 23" on drum 52, thereby providing additional means for controlling the deposition of each of the drops on the recording medium.

What is claimed is:

1. Apparatus for printing predetermined characters on a recording medium as a function of input signals characteristic of each of said characters, said apparatus comprising: a marking liquid reservoir; a nozzle means communicating with said reservoir for forming discrete and uniform marking liquid drops directed in a path generally towards said recording medium; transport means for driving said recording medium across said path whereby drops may normally impinge on different portions along said recording medium; intercepting means displaced from said path and displaced from said recording medium and for intercepting drops and preventing them from reaching said recording medium; electrostatic charge and deflecting means for deflecting drops from said path to be intercepted by said intercepting means or to impinge on said recording medium at predetermined points across said recording medium; and signal generating means responsive to said input signals characteristic of each of said characters for controlling said electrostatic charge and deflecting means to displace predetermined ones of said drops to reach discrete places across said medium and to displace predetermined others of said drops to reach said intercepting means, to print each of said predetermined characters on said recording medium.

2. Apparatus responsive to input signals characteristic of predetermined characters for printing said predetermined characters on a recording medium, said apparatus comprising: an ink reservoir; a nozzle communicating with said reservoir to provide ink in the nozzle; an electrically energizable piezoelectric device mechanically coupled to said nozzle; electrical means for producing mechanical vibration in said piezoelectric device and the nozzle coupled thereto to induce the ultimate formation of ink drops which are discrete and uniform; a recording medium which traverses the path generally taken by said ink drops; intercepting means displaced from said recording medium and for preventing predetermined ones of said drops from reaching said recording medium; electrostatic charge means for charging said ink drops, as a function of the input signals characteristic of said characters; and deflecting means for deflecting said drops from said path, as a function of the charges thereof to provide a print-out of each of said predetermined characters on the recording medium.

3. Apparatus for printing a visible record on a recording medium, said apparatus comprising: an ink reservoir; means for forming discrete and uniform ink drops at a constant rate, said last mentioned means including a nozzle communicating with said reservoir and directing drops in a path generally toward said recording medium; means for driving said recording medium transversely with respect to said path so that said drops may impinge on said recording medium; means for deflecting said ink drops across said recording medium at a rate related in a predetermined manner to the rate of formation of said ink drops so that said deflection and the motion of said driving means may form a matrix capable of having a pre- 10 determined number of said ink drops in rows and in columns; and means for deflecting selected ones of said drops beyond said matrix to form a printed character by the drops remaining on said matrix.

4. Apparatus for printing visible characters on a recording medium as a function of received input signals, said apparatus comprising:

(a) a reservoir containing a marking fluid,

(b) a nozzle means coupled to said reservoir for forming from the marking fluid contained thereat discrete, substantially uniform sized, fluid drops at a substantially constant frequency,

(c) a recording medium arranged generally in the path of said fluid drops as formed by said nozzle means,

(d) means for selectively deflecting predetermined ones of said fluid drops across a portion of said recording medium according to discrete levels corresponding to a predetermined number of columnar positions on said recording medium,

(e) means for driving said recording medium in a direction substantially transverse to the line of columnar positions to which fluid is directed by the selective action of said deflecting means, said driving means having a speed which is correlated with the speed of the deflecting means, so that said deflection and the motion of the recording medium as driven by said driving means combine to form plural matrices each capable of receiving a predetermined number of fluid drops arranged in cross rows as well as in columns for each matrix, the means for deflecting predetermined ones of the fluid drops having associated therewith a separate means for diverting others of the drops to points ofl the recording medium whereby to form printed characters consisting of drops remaining on said matrices on the recording medium.

5. Apparatus as in claim 4 further characterized by the (b) nozzle means comprising a piezoelectric device and means for energizing said device to control the mechanical forces on said fluid in a predetermined time oriented sequence for controlling the uniformity of said drops and the spacings therebetween, the (d) deflecting means including a pair of electrically oppositely energized deflecting plates arranged one on either side of a portion of the paths of drops from nozzle toward recording medium, said deflecting means further comprising electrodes and connections thereto for electrostatically charging the drops of marking fluid according to said received input signals to control the action of the deflecting plates on the differentially charged drops.

6. Apparatus in claim 5 further characterized by the (b) nozzle means comprising a conduit, said piezoelectric device being in the form of a polarized ceramic tube having a conductive material electrode at its internal diameter and a conductive material electrode at its outside diameter, said ceramic tube being mechanically coupled at the internal diameter thereof to said conduit to be coaxially aligned with the direction of flow of the marking fluid, and

(g) electrical oscillator means for oppositely energizing the electrodes of 'said piezoelectric device at a frequency related to the rate of electrostatically charging said drops in accordance with said received input signals.

7. Apparatus as in claim 4 further characterized by the (c) recording medium being in the form of a relatively wide, relatively long, single sheet, a plurality of combinations arranged, transversely of the direction of motion of said sheet, each cobination having (b) nozzle means, having (d) deflecting means, and having f) diverting means, and means for providing each of said combinations with received input signals characteristic of another character to be recorded to simultaneously print a plurality of sequentially readable characters on said single sheet.

1 1 8. In a drop apparatus of the type'havinga nozzle fed with a marking liquid under pressure and havingiassociated with said nozzle and the liquid therewithin means to control the uniform formation of drops which are discrete, of uniform mass and uniformly separated from one another, the improvement comprising: a transducer comprising a cylindrical tube of ceramic material with piezoelectric properties, a first electrode-coupled to said ceramic material at its inside diameter and a second elec- :trode coupled at its outside diameter and means for mechanically coupling said transducer to said nozzle with said tube ofcerarnic material surrounding at least a portion of the liquid associated with the nozzle, to control the uniform formation of said drops.

9. Apparatus for recording a character on a recording 'me'dium'as a function of a set of input signals characteristic ofsaid charactercomprising: a source of marlring liquid; drop forming means in communication with said sourceof marking liquid for forming a plurality of unifOr-m marking liquid drops at a predetermined rate; a recording medium disposed with respect to said drop forming means, saidrecording medium having a surface sensitiveto liquid drops deposited thereon; drive means for controlling the motion of said recording means at a rate related to said predetermined rate at which said liquid drops are formed; means for controlling the deposition of said marking liquid drops on the sensitive 12 V of uniform liquid drops 'by controlling the mechnica vibratory forces applied to said conduit.

13. An apparatus as recited in claim 12 wherein means for energizing include a source of oscillatory signals of a frequency related to said predetermined rate at which said drops are formed.

14. An apparatus as recited in claim 10 wherein said deflection means disposed between said drop forming means and said recording medium include a pair of deflecting plates for providing an electric field therebetween, said field being in a direction substantially perpendicular to said selected path; and electrostatic charging means responsive to saidsetof input signals for variably deflecting-some of said drops unto said surface by variably charging said drops in accordance'with said set of input signals. I

15. An apparatus asrecited in claim 14 wherein said electrostatic charging means includes function generating means responsive to said set of input signals for converting them to related voltage signals; a charging tunnel disposed between said means for directing said drops and saidpair of deflecting plates for charging drops therein, said tunnel having an aperture sufficientto enable said drops directed in said selected path to pass therethrough; and means for supplying said related voltage signals to said charging tunnel.

surface of said recording medium to record said character thereon, said means-including electrostatic charge means responsive tosaid input signals for depositing liquid drops on saidsensitive surface to record said character thereon, 'and for deflecting the rest'of the liquid drops of said plurality of drops from said sensitive surface; and intercepting means disposed adjacent said recording medium for receiving the liquid drops deflected by said electrostatic eharge means from said sensitive surface.

10. An apparatus for recording a character on a recording medium as a function "of a set of input signals related to said character comprising: a source of marking liquid; a recording medium having a surface which is sensitive to said liquid for producing a record as a function of the deposition of said liquid on said surface; drop forming means in communication with said source, and displaced from said recording medium for forming a sequence of uniform liquid drops at a predetermined rate, each drop. being of substantially equal size and weight and uniformly spaced from one another; means for directing said drops in a selected path toward said surface of said recording medium; and deflection means for controlling the deposition of said drops on said surface to record said character thereon, said deflection means including means responsive to said set of input signals for deflecting some of said drops in said sequence unto said surface to produce said character and for deflecting other drops in said sequence away from said surface.

11. An apparatus as recited in claim 10 further including drive means for controllably moving said recording medium at a rate related to said predetermined rate at which said drops are formed to control the recording of said character on said surface.

12. An apparatus as recited in claim 11 wherein said drop forming means include a conduit having one end in communication with said source for containing liquid therein; nozzle means coupled at the other end of said conduit for controlling the flow of liquid therefrom; transducer means having piezoelectric characteristics mechan ically coupled to said conduit about the outer surface thereof adjacent said nozzle means for applying mechanical vibratory forces to said conduit; and means for energizing said transducer means to provide said sequence 16. In an apparatus responsive to a set of input signals characteristic of a character for recording saidcharacter on a recording medium by controlling the deposition of a plurality of liquid drops on a sensitive surface of said recording medium, said apparatus including a source of liquid, a conduit having a nozzle at one end which is directed toward said sensitive surface and which is large enough to pass therethrough liquid from said source, the improvement comprising: a piezoelectric transducer mechanically coupled to said conduit near the nozzle end thereof; and means for energizing said transducer to control the flow of liquid through said nozzle and the formation of a. sequence of liquid drop-s each drop being of substantially equal mass and size and the spacings between drops in said sequence being substantially equal.

17. In an apparatus asrecited in claim 16 wherein said means for energizing include a source of oscillatory signals of a predetermined frequency for energizing said piezoelectric transducer with said signals to mechanically vibrate the nozzle end of said conduit to form said sequence of liquid drops at a rate substantially equal to said predetermined frequency.

18. In an apparatus as recited in claim 17 wherein said piezoelectric transducer comprises a tube-like piezoelectric material, a first electrode coupled thereto at the inside diameter of said tube-like material, and a second electrode coupled to the outside diameter, means for coupling said source of oscillatory signals to said first and second electrodes, said transducer being axially mechanically coupled to said conduit at the inside diameter thereof, whereby said tube-like piezoelectric material surrounds a portion of said conduit.

References Cited by the Examiner UNITED STATES PATENTS OTHER REFERENCES Fast Oscillograph Squirts Ink, Electronic Design, October 11, 1963, pages 2829.

RICHARD B. WILKINSON, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1941001 *Jan 19, 1929Dec 26, 1933Rca CorpRecorder
US3012839 *Jul 15, 1954Dec 12, 1961Burroughs CorpElectrographic printer
US3060429 *May 16, 1958Oct 23, 1962 Certificate of correction
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3370297 *Apr 9, 1965Feb 20, 1968Honeywell IncInk droplet recorder with droplet interception control
US3432844 *Apr 21, 1965Mar 11, 1969Teletype CorpCharacter generation logic
US3465350 *Mar 13, 1968Sep 2, 1969Dick Co AbInk drop writing apparatus
US3465351 *Mar 13, 1968Sep 2, 1969Dick Co AbInk drop writing apparatus
US3476874 *Nov 8, 1966Nov 4, 1969Loughren Arthur VControlled ink-jet copy-reproducing apparatus
US3484793 *May 2, 1966Dec 16, 1969Xerox CorpImage recording apparatus ink droplet recorder with optical input
US3488664 *Feb 16, 1968Jan 6, 1970Teletype CorpInk transfer printer
US3500436 *Jan 8, 1968Mar 10, 1970Teletype CorpFluid transfer device
US3512173 *Dec 28, 1967May 12, 1970Xerox CorpAlphanumeric ink droplet recorder
US3560641 *Oct 18, 1968Feb 2, 1971Mead CorpImage construction system using multiple arrays of drop generators
US3564120 *Oct 18, 1968Feb 16, 1971Mead CorpImage construction system with arcuately scanning drop generators
US3577198 *Nov 24, 1969May 4, 1971Mead CorpCharged drop generator with guard system
US3579245 *Dec 7, 1967May 18, 1971Teletype CorpMethod of transferring liquid
US3582958 *Apr 26, 1968Jun 1, 1971Massachusetts Inst TechnologyIon beam printer
US3584571 *Aug 25, 1967Jun 15, 1971Pannier Corp TheCharacter generation marking device
US3604980 *May 25, 1970Sep 14, 1971Mead CorpDrop-charging apparatus
US3623123 *Mar 10, 1969Nov 23, 1971Singer CoElectrostatic printer
US3631509 *Jul 2, 1969Dec 28, 1971Varian AssociatesHigh-speed coincident pulse electrographic printer with gray scale printing capability
US3631511 *May 8, 1970Dec 28, 1971Dick Co AbDrop charge compensated ink drop video printer
US3636967 *Jun 2, 1970Jan 25, 1972Plessey Co LtdControl of fluidic devices
US3641588 *Jun 10, 1970Feb 8, 1972Teletype CorpElectrostatic printer
US3662399 *May 13, 1970May 9, 1972Casio Computer Co LtdNozzle for ink jet and method for manufacturing the same
US3723646 *Apr 5, 1971Mar 27, 1973Mead CorpApparatus for reconstruction of images
US3750191 *Sep 25, 1972Jul 31, 1973IbmSynchronization of multiple ink jets
US3786517 *Sep 5, 1972Jan 15, 1974IbmInk jet printer with ink system filter means
US3813676 *Oct 5, 1972May 28, 1974IbmNon-sequential symbol generation system for fluid jet printer
US3854399 *Dec 29, 1972Dec 17, 1974Dick Co AbMethod and means for operating an ink jet printer without splatter
US3878517 *Jun 1, 1973Apr 15, 1975Sharp KkInk jet system of charge amplitude controlling type
US3878519 *Jan 31, 1974Apr 15, 1975IbmMethod and apparatus for synchronizing droplet formation in a liquid stream
US3889270 *Jul 10, 1973Jun 10, 1975Agfa Gevaert AgInk jet recording material
US3898671 *Dec 12, 1973Aug 5, 1975Teletype CorpInk jet recording
US3956756 *Mar 28, 1974May 11, 1976Imperial Chemical Industries, Inc.Pattern printing apparatus
US3972052 *Oct 24, 1973Jul 27, 1976Oki Electric Industry Company, Ltd.Compensation apparatus for high speed dot printer
US3972053 *Aug 20, 1975Jul 27, 1976Skala Stephen FInk drop printer with transfer members
US3992713 *Jun 20, 1975Nov 16, 1976International Business Machines CorporationInk jet printing system with pedestal synchronization
US4006482 *May 1, 1975Feb 1, 1977Imperial Chemical Industries LimitedPattern printing apparatus
US4034379 *Nov 13, 1972Jul 5, 1977Teletype CorporationInk jet writing process and apparatus
US4050564 *Dec 4, 1975Sep 27, 1977International Business Machines CorporationElectronic control for optimizing carrier turnaround in printing apparatus
US4060804 *Jan 30, 1976Nov 29, 1977Hitachi, Ltd.Ink jet recording method and apparatus
US4083053 *Mar 17, 1976Apr 4, 1978Hitachi, Ltd.Ink jet recording method and apparatus
US4085409 *Jun 1, 1976Apr 18, 1978The Mead CorporationMethod and apparatus for ink jet printing
US4095233 *Jun 30, 1976Jun 13, 1978Xerox CorporationMethod for forming a charge pattern
US4097873 *Feb 28, 1977Jun 27, 1978International Business Machines CorporationInk jet printer for selectively printing different resolutions
US4115787 *Aug 14, 1975Sep 19, 1978Nippon Telegraph And Telephone Public CorporationInterpolation in an ink jet system printer
US4126711 *Sep 4, 1975Nov 21, 1978Xerox CorporationCharge pattern development method and apparatus
US4143381 *Sep 1, 1976Mar 6, 1979Moore Business Forms, Inc.Method for information processing
US4153467 *Nov 24, 1976May 8, 1979Dai Nippon Toryo Co., Ltd.Method of ink jet printing
US4190845 *Dec 22, 1978Feb 26, 1980International Business Machines CorporationElectric field orientation for ink jet printers for vertical and horizontal printing
US4207578 *Jan 8, 1979Jun 10, 1980The Mead CorporationCatch trough for a jet drop recorder
US4219822 *Aug 17, 1978Aug 26, 1980The Mead CorporationSkewed ink jet printer with overlapping print lines
US4238804 *Feb 28, 1979Dec 9, 1980Xerox CorporationStitching method and apparatus for multiple nozzle ink jet printers
US4258370 *May 4, 1979Mar 24, 1981The Mead CorporationJet drop printer
US4291340 *Sep 12, 1979Sep 22, 1981The Mead CorporationJet drop copier with multiplex ability
US4303924 *Dec 26, 1978Dec 1, 1981The Mead CorporationJet drop printing process utilizing a radiation curable ink
US4306243 *Sep 21, 1979Dec 15, 1981Dataproducts CorporationInk jet head structure
US4307407 *Jun 30, 1980Dec 22, 1981The Mead CorporationInk jet printer with inclined rows of jet drop streams
US4308546 *Nov 5, 1979Dec 29, 1981Gould Inc.Ink jet tip assembly
US4347521 *Nov 3, 1980Aug 31, 1982Xerox CorporationTilted deflection electrode method and apparatus for liquid drop printing systems
US4368475 *Apr 24, 1981Jan 11, 1983The Mead CorporationJet drop copier
US4381563 *Dec 18, 1980Apr 26, 1983International Business Machines CorporationApparatus and method for visually presenting analytical representations of digital signals
US4412233 *Jun 7, 1982Oct 25, 1983Ncr CorporationInk evaporation prevention means for ink jet print head
US4493137 *Sep 19, 1983Jan 15, 1985Ncr CorporationMethod of making a drive element assembly for ink jet printing
US4506999 *Jul 12, 1983Mar 26, 1985Telesis Controls CorporationProgram controlled pin matrix embossing apparatus
US4523202 *Feb 3, 1982Jun 11, 1985Burlington Industries, Inc.Random droplet liquid jet apparatus and process
US4531138 *Dec 16, 1983Jul 23, 1985Canon Kabushiki KaishaLiquid jet recording method and apparatus
US4560584 *Dec 23, 1983Dec 24, 1985Universal Instruments CorporationMethod and apparatus for applying solder masking to a circuit board
US4596990 *Jul 2, 1984Jun 24, 1986Tmc CompanyMulti-jet single head ink jet printer
US4616234 *Aug 15, 1985Oct 7, 1986Eastman Kodak CompanySimultaneous phase detection and adjustment of multi-jet printer
US4618869 *Oct 29, 1981Oct 21, 1986Sharp Kabushiki KaishaFacsimile print out system employing an ink jet system printer
US4644369 *May 9, 1985Feb 17, 1987Burlington Industries, Inc.Random artificially perturbed liquid jet applicator apparatus and method
US4668533 *May 10, 1985May 26, 1987E. I. Du Pont De Nemours And CompanyInk jet printing of printed circuit boards
US4680595 *Nov 6, 1985Jul 14, 1987Pitney Bowes Inc.Impulse ink jet print head and method of making same
US4695854 *Jul 30, 1986Sep 22, 1987Pitney Bowes Inc.External manifold for ink jet array
US4698642 *Jun 10, 1985Oct 6, 1987Burlington Industries, Inc.Non-artifically perturbed (NAP) liquid jet printing
US4703333 *Jan 30, 1986Oct 27, 1987Pitney Bowes Inc.Impulse ink jet print head with inclined and stacked arrays
US4736704 *Sep 24, 1985Apr 12, 1988Universal Instruments CorporationApparatus for applying solder masking to a circuit board
US4828886 *Nov 4, 1987May 9, 1989U.S. Philips CorporationUsing piezoelectric transduler as pressure generator
US4972211 *Mar 27, 1989Nov 20, 1990Canon Kabushiki KaishaInk jet recorder with attenuation of meniscus vibration in a ejection nozzle thereof
US5065158 *Feb 16, 1990Nov 12, 1991Canon Kabushiki KaishaHydrogenated nitrile butadiene rubber
US5270368 *Jul 15, 1992Dec 14, 1993Videojet Systems International, Inc.Acrylate resin
US5395432 *Oct 5, 1993Mar 7, 1995Videojet Systems International, Inc.Zinc chloride; latent images
US5420618 *May 8, 1992May 30, 1995Ricoh Company, Ltd.Ink jet recording method and apparatus having drop size control by using plural control electrodes
US5560543 *Sep 19, 1994Oct 1, 1996Board Of Regents, The University Of Texas SystemHeat-resistant broad-bandwidth liquid droplet generators
US5594044 *Mar 3, 1995Jan 14, 1997Videojet Systems International, Inc.Polyurethane, cellulose nitrate, adhesion promoter, dye, solvent
US5596027 *Jul 13, 1995Jan 21, 1997Videojet Systems International, Inc.Carrier, polyamine, colorant, acidic resin
US5598200 *Jan 26, 1995Jan 28, 1997Gore; David W.Method and apparatus for producing a discrete droplet of high temperature liquid
US5652286 *Apr 4, 1996Jul 29, 1997Videojet Systems International, Inc.Wet surface marking jet ink
US5755860 *Dec 19, 1996May 26, 1998Videojet Systems International, Inc.Invisible fluorescent jet ink
US5810988 *Oct 1, 1996Sep 22, 1998Board Of Regents, University Of Texas SystemApparatus and method for generation of microspheres of metals and other materials
US5821963 *Sep 30, 1997Oct 13, 1998Videojet Systems International, Inc.Continuous ink jet printing system for use with hot-melt inks
US5889083 *Sep 6, 1996Mar 30, 1999Videojet Systems International, Inc.Comprises water, a colorant, a binder resin and a wax suitable for printing scratch and rub resistance identifying marks on the substarte such as paper, plastic, glass and metal
US6010564 *Oct 16, 1997Jan 4, 2000Videojet Systems International, Inc.Printing on plastic; mixture of solvent, dye, cellulose nitrate and rosin
US6109739 *Jun 12, 1998Aug 29, 2000Marconi Data Systems IncDot positioning for continuous ink jet printer
US6140391 *Oct 9, 1998Oct 31, 2000Marconi Data Systems Inc.Comprising an ink carrier including one or more alcohols, a colorant, a polyol, an aldehyde-based cross-linking agent, and a catalyst that promotes a reaction between the cross-linking agent, the polyol, and the substrate
US6221933Apr 1, 1999Apr 24, 2001Marconi Data Systems Inc.Fast drying jet ink composition
US6251175Aug 6, 1998Jun 26, 2001Marconi Data Systems Inc.Jet ink composition
US6285032 *May 9, 1996Sep 4, 2001Eltexelektrostatik GmbhDevice for removing the gaseous laminar boundary layer of a web
US6312113Oct 29, 1999Nov 6, 2001Marconi Data Systems Inc.Ink circulation system
US6338545Jul 8, 1999Jan 15, 2002Ricoh Company, Ltd.Liquid jet recording apparatus using a fine particle dispersion recording composition
US6444019Jun 10, 1999Sep 3, 2002Videojet Technologies Inc.Volatile organic solvent, oil, colorant and binder resins which are soluble in solvent by not oil; nonclogging even after long nonprinting intervals; fast drying; excellent adhesion to nonporous substrates
US6511163Mar 12, 1998Jan 28, 2003Iris Graphics, Inc.Printing system
US6554401Nov 19, 2001Apr 29, 2003Ricoh Company, Ltd.Liquid jet recording apparatus using a fine particle dispersion recording composition
US6598959Nov 16, 2001Jul 29, 2003Ricoh Company Ltd.Liquid jet recording apparatus using a fine particle dispersion recording composition
US6626527Oct 12, 2000Sep 30, 2003Creo Americas, Inc.Interleaved printing
US6656545May 18, 2000Dec 2, 2003Stora Enso North America CorporationAqueous suspension of absorptive silica, polyvinyl alcohol binder and cationic polymer fixing agent
US6713550Aug 27, 2001Mar 30, 2004Stora Enso North America CorporationBinder selected from the group consisting of polyvinyl alcohol, starches, latexes, polyvinyl pyrrolidone, and modified cellulose; cationic polymeric fixing agent; silica pigment; styrene acrylic sizing agent
US6726756May 26, 2000Apr 27, 2004Videojet Technologies Inc.Reducing or eliminating ink make-up in continuous ink jet printing by providing oil-free ink composition comprising liquid vehicle including 1-methoxy-2-propanol, colorant, and one or more selected binder resins
US6808767Apr 19, 2001Oct 26, 2004Stora Enso North America CorporationHigh gloss ink jet recording media
US6843555Oct 22, 2001Jan 18, 2005Videojet Technologies Inc.Printing method for continuous ink jet printer
US6871940Nov 16, 2001Mar 29, 2005Ricoh Company, Ltd.Liquid jet recording apparatus using a fine particle dispersion recording composition
US6918666Mar 12, 2003Jul 19, 2005Ricoh Company, Ltd.Fabrication of functional device mounting board making use of inkjet technique
US7004572Jul 3, 2003Feb 28, 2006Creo Inc.Ink jet printing system with interleaving of swathed nozzles
US7063415Nov 24, 2004Jun 20, 2006Ricoh Company, Ltd.Liquid jet apparatus using a fine particle dispersion liquid composition
US7084559Oct 23, 2003Aug 1, 2006Ricoh Company, Ltd.Electron-emitting device manufacturing apparatus, solution including metal micro-particles, electron-emitting device, and image displaying apparatus
US7147801Mar 12, 2004Dec 12, 2006Videojet Technologies Inc.Ink jet ink composition and method for security marking
US7150521Sep 11, 2003Dec 19, 2006Ricoh Company, Ltd.Liquid jet recording apparatus, liquid jet head, and recording liquid
US7178912Apr 20, 2006Feb 20, 2007Ricoh Company, Ltd.Liquid jet apparatus using a fine particle dispersion liquid composition
US7279511Dec 9, 2002Oct 9, 2007Videojet Technologies Inc.Opaque ink jet ink composition
US7309388Feb 10, 2004Dec 18, 2007Videojet Technologies Inc.Jet ink composition for low surface energy substrates
US7347539Sep 24, 2004Mar 25, 2008Videojet Technologies Inc.System and method for auto-threshold adjustment for phasing
US7374279Feb 22, 2006May 20, 2008Ricoh Company, Ltd.Liquid jet recording apparatus, liquid jet head and recording liquid
US7380690Jan 15, 2004Jun 3, 2008Ricoh Company, Ltd.Solution jet type fabrication apparatus, method, solution containing fine particles, wiring pattern substrate, device substrate
US7429100Mar 8, 2007Sep 30, 2008Kba Metronic AgMethod and device for increasing number of ink drops in an ink drop jet of a continuously operating inkjet printer
US7503822Jan 17, 2006Mar 17, 2009Ricoh Company, Ltd.Electron-emitting device manufacturing apparatus
US7553375Feb 23, 2005Jun 30, 2009Ricoh Company, Ltd.Fabrication of functional device mounting board making use of inkjet technique
US7578575Mar 10, 2003Aug 25, 2009Ricoh Company, Ltd.Liquid jet apparatus using a fine particle dispersion liquid composition
US7578577Jan 3, 2007Aug 25, 2009Ricoh Company, Ltd.Liquid jet apparatus using a fine particle dispersion liquid composition
US7598518Mar 7, 2006Oct 6, 2009Ricoh Company, Ltd.Organic transistor with light emission, organic transistor unit and display device incorporating the organic transistor
US7637606Apr 11, 2008Dec 29, 2009Ricoh Company, Ltd.Liquid jet apparatus, liquid jet head, and liquid
US7738261Nov 16, 2007Jun 15, 2010Ricoh Company, Ltd.Functional device fabrication apparatus and functional device fabricated with the same
US8058791Jan 29, 2009Nov 15, 2011Ricoh Company, Ltd.Electronic circuit board manufacturing apparatus and electronic circuit board
US8517530Feb 8, 2012Aug 27, 2013Ricoh Company, Ltd.Fabrication of functional device mounting board making use of inkjet technique
USRE37862 *Aug 17, 1995Oct 1, 2002Thomas G. HertzMethod and apparatus for high resolution ink jet printing
DE2045617A1 *Sep 15, 1970Mar 16, 1972Hertz CTitle not available
DE2142639A1 *Aug 25, 1971Mar 2, 1972 Title not available
DE2144892A1 *Sep 8, 1971Aug 16, 1973Clevite CorpGepulste tropfenauswerfvorrichtung
DE2249618A1 *Oct 10, 1972Apr 19, 1973Mead CorpVerfahren zur steuerung der ablagerung von tropfen einer fluessigkeit auf einer aufnahmeflaeche sowie die einrichtung zur durchfuehrung dieses verfahrens
DE2340120A1 *Aug 8, 1973Mar 14, 1974IbmTintenstrahlschreiber
DE2344453A1 *Sep 4, 1973Mar 14, 1974IbmTintenstrahlmatrixdrucker
DE2362415A1 *Dec 15, 1973Jul 4, 1974IbmTintenstrahldrucker
DE2845862A1 *Oct 21, 1978May 3, 1979IbmAbfuehlanordnung fuer tintenstrahldrucker
DE2944005A1 *Oct 31, 1979May 8, 1980Canon KkFluessigkeitsstrahl-aufzeichnungsvorrichtung
DE3008487A1 *Mar 5, 1980Sep 18, 1980Canon KkTintenstrahlaufzeichnungsgeraet
DE3012720A1 *Apr 1, 1980Oct 16, 1980Canon KkFluessigkeitstroepfchenerzeugungs- einrichtung
DE3047835A1 *Dec 18, 1980Sep 17, 1981Canon KkTintenstrahl-aufzeichnungskopf
DE3051102C2 *Feb 13, 1980Jul 27, 1995Canon KkInk drop recording device for HF signals
DE3139160A1 *Oct 1, 1981Apr 15, 1982Canon KkTintenstrahlaufzeichnungsverfahren und -geraet
DE3247870A1 *Dec 23, 1982Jul 14, 1983Ricoh KkInk jet printer
DE3433536A1 *Sep 12, 1984May 2, 1985Ncr CoVerfahren zum herstellen eines druckkopfes fuer einen tintenstrahldrucker
DE3433536C2 *Sep 12, 1984Mar 5, 1987Ncr Corp., Dayton, Ohio, UsTitle not available
DE102006011072A1 *Mar 8, 2006Sep 13, 2007Kba-Metronic AgVerfahren und Vorrichtung zur Erhöhung der Tintentropfenanzahl in einem Tintentropfenstrahl eines kontinuierlich arbeitenden Tintenstrahldruckers
DE102006011072B4 *Mar 8, 2006Aug 26, 2010Kba-Metronic AktiengesellschaftVerfahren und Vorrichtung zur Erhöhung der Tintentropfenanzahl in einem Tintentropfenstrahl eines kontinuierlich arbeitenden Tintenstrahldruckers
EP0015727A1 *Feb 28, 1980Sep 17, 1980Xerox CorporationElectrostatic ink jet printing apparatus and method
EP0084891A2 *Jan 27, 1983Aug 3, 1983TMC CompanyA multi-jet single head ink jet printer
EP1380045A1 *Mar 29, 2002Jan 14, 2004Wisconsin Alumni Research FoundationPiezoelectric charged droplet source
WO1990009566A1 *Feb 17, 1989Aug 23, 1990Le I Tochnoj Mekhaniki OptikiElectric drop-jet generator
WO1997014509A1 *Oct 18, 1996Apr 24, 1997Michael DoeringDevice for the micro-metering of settling suspensions or emulsions in engraving depressions of a writing implement
WO2003035399A1Oct 21, 2002May 1, 2003Videojet Technologies LtdPrinting method for continuous ink jet printer
WO2005105468A1Apr 28, 2005Nov 10, 2005Chris JenkisMethod for improving the quality of ink jet printed images
WO2011018786A1Aug 10, 2010Feb 17, 2011Kornit Digital Ltd.Inkjet compositions and processes for stretchable substrates
Classifications
U.S. Classification347/74, 101/114, 101/93.4, 347/75, 347/105, 216/41, 347/95, 178/30
International ClassificationG06F3/06, B41J2/39, G06K15/00, B41J2/095, C09D11/02, B41J2/075
Cooperative ClassificationG06K15/00, B41J2/075, C09D11/02, G06F3/06, B41J2/095, B41J2/39
European ClassificationB41J2/075, B41J2/39, B41J2/095, G06F3/06, G06K15/00, C09D11/02