Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3083637 A
Publication typeGrant
Publication dateApr 2, 1963
Filing dateJul 24, 1961
Priority dateJul 25, 1960
Publication numberUS 3083637 A, US 3083637A, US-A-3083637, US3083637 A, US3083637A
InventorsRitzerfeld Gerhard, Ritzerfeld Wilhelm
Original AssigneeRitzerfeld Gerhard, Ritzerfeld Wilhelm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Program controlled selective duplicator
US 3083637 A
Abstract  available in
Images(6)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

April 2, 1963 w. RITZERFELD ETAL 3,083,637

PROGRAM CONTROLLED SELECTIVE DUPLICATOR Filed July 24, 1961 6 Sheets-Sheet 1 April 1963 w. RITZERFELD ETAL 3,033,537

PROGRAM CONTROLLED SELECTIVE DUPLICATOR Filed July 24, 1961 6 Sheets-Sheet 2 MAW April 2, 1963 w. RITZERFELD ETAL 3,083,637

PROGRAM CONTROLLED SELECTIVE DUPLICATOR Filed July 24, 1961 6 Sheets-Sheet 3 Inventor:

,M 4/ flan f 6 $14M f Af/w A17 April 1963 w. RITZERFELD ETAL 3,0335637 PROGRAM CONTROLLED SELECTIVE DUPLI'CATOR 6 Sheets-Sheet 4 Filed July 24. 1961 wfQ April 1963 w. RITZERFELD ETAL 3,083,637

PROGRAM CONTROLLED SELECTIVE DUPLIGATOR Filed July 24, 1961 6 Sheets-Sheet 5 April 1963 w. RITZERFELD ETAL 3,083,637.

PROGRAM CONTROLLED SELECTIVE DUPLICATOR Filed Jilly 24, 1961 6 Sheets-Sheet 6 United States Patent 3,083,637 PRGGRAM 'CQNTROLLED SELECTlVE DUELEATGR Wilhelm Ritzerfeid, Schoriemer Alice 14, Berlin-Dahlem, Germany, and Gerhard Ritzerield, Franzensbader Strasse 21, Eeriin-Grunewald, Germany Filed Euly 24, 1961, Ser. No. 126,345 Claims priority, application Germany .iuly 25, 156% Claims. (Cl. 191-4325) The present invention relates to a program controlled selective duplicator, and more particularly to a rotary duplicator for printing selected sections of a master sheet in adjacent positions on copy sheets.

It is known to provide a keyboard, or other selector means, for selecting desired printing sections of the master sheet for reproduction. However, the selection of the desired printing sections requires actually more time than the printing operation.

It is one object of the present invention to overcome this disadvantage of known selective duplicators, and to provide a program controlled selected duplicator.

Another object of the present invention is to provide a duplicator which can be controlled by different programs during successive revolutions of the printing roller so that diilerent printing sections are selected for printing during successive revolutions of the printing roller.

Another object of the present invention is to provide sensing means including a photocell for sensing markings associated with selected printing sections.

With these objects in view, the present invention relates to a duplicator which comprises a printing roller and a counter pressure roller; one of the rollers having on the periphery thereof a set of pressure members which are movable to a radially projecting pressing position; feeding means for feeding copy sheets to a printing line formed between a pressure member in its pressing position and the respective other roller; operating means having an operative position for moving the pressure member to the pressing position when the same pass through the printing line; sensing means for sensing markings; means for moving a program carrier, which may be part of a master sheet on the printing roller, or a program tape, in synchronism with the movement of the printing roller past the sensing means; and control means controlled by the sensing means and connected to the operating means for moving the same to the operative position when the sensing means responds to a marking.

The markings are arranged on the master sheet, or on a separate carrier tape, so that they are spaced corresponding to the spacing of selected printing sections of the master sheet. Consequently, when a marking is sensed by the sensing means, the control means move the operating means to the operative position so that the respective pressure member is moved to its pressing position when passing through the printing line, and in this manner, the projecting pressing member raises the respective sheet, namely the master sheet, if the pressure members are arranged on the printing roller, or the copy sheet when the pressure members are arranged on the counter pressure roller, so that the respective corresponding sections of the master sheet and of the copy sheet are pressed together, and the imprint of the selected section of the master sheet is formed on the copy sheet.

While pressure members in retracted position pass through the printing line, the master sheet does not engage the respective copy sheet, and consequently the nonselected printing sections of the master sheet pass the copy sheet While the same is immovable. Consequently, the next selected section of the master sheet, correlated amass-37.v Patented Apr. 2, 1963 to a marking to which the sensing means responds, is imprinted on the copy sheet adjacent the preceding imprint.

In the preferred embodiment of the present invention, the pressure members are provided on the printing roller circumferentially arranged about the periphery of the same, and each extending in axial direction of the printing roller. When a pressure member is moved in radial direction to a projecting position, it bulges the respective section of the master sheet outwardly, so that it engages a corresponding section of the copy sheet when passing through the printing line. Each pressure member has an operating member mounted thereon which is shiftable in axial direction to an operative position in which it cooperates with a stationary cam having a lobe in the region of the printing line, so that the respective pressure member is moved to its printing position when passing through the printing line. If, however, the respective operating member is not in its operative position, it does not engage the stationary cam, and consequently the respective pressure member is not outwardly moved, and no imprint is produced.

The operating members are preferably shifted by electromagnetic means which are connected into the circuit of a photocell forming part of the sensing means. A source of light illuminates the carrier of the markings, and different amounts of light are reflected from the markings and from the surface of the carrier where there are no markings, and consequently the photocell responds to produce impulses which control the electromagnet means through a flip-flop circuit including two thyratrons.

In the embodiment of the invention in which a separate transporting means is provided for transporting a program carrier with markings, such carrier may be a perforated tape in which the perforations constitute markings, or a copy of the master sheet may be used, after having been provided with suitable markings.

Preferably, several columns of markings are provided on the master sheet, or on the independent carrier, and the sensing means is shiftable between the plurality of positions cooperating with respective selected column of markings.

In this manner, the first column may be used for the first revolution of the printing roller to select certain desired printing sections of the master sheet for printing. Before the next revolution of the printing roller, the sensing means is shifted to cooperate with the next following column of markings, which may be arranged in a different order to select different printing sections for printing during the second revolution of the printing roller, and in this manner, any number of columns of markings may be provided for controlling the printing operations during successive revolutions of the printing roller.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. 1 is a cross sectional View of a rotary duplicator according to one embodiment of the present invention;

PEG. 2 is an axial sectional View taken on line AB in FIG. 1;

FIG. 3 is a View illustrating a master sheet which may be used in the embodiment of FIGS. 1 and 2;

FIG. 4 is a schematic and diagrammatic view illustrating the electrical circuit used in the embodiment of FIGS. 1 and 2;

FIG. is a schematic and diagrammatic view illustrating the electric circuit used in a modified embodiment of the invention with the structural parts shown in FIG. 1 omitted for the sake of clarity; and

FIG. dis a plan view of a program tape transporting arrangement used in the modified embodiment of FIG. 5.

Referring now to the drawings, and more particularly to FIG. 1, a printing roller 2 is secured to a drive shaft 1 and has mounted thereon a master sheet 3 which extends about a periphery of the printing roller 2, and is secured thereto by suitable mounting means including a clamping means2a and a spring 2!). Pressure or printing members 4 are arranged about the periphery of the printing drum 2, and extend in axial direction corresponding to circumferenn'ally arranged printing sections of the master sheet 3.

The construction of the pressure members 3 is best seen in FIG. 2. Each pressure member is guided for radial movement in cor-responding slots of the printing roller 2, and is urged by springs 5 and 6 to a retracted position in which the outer pressure face of the pressure member is flush with the corresponding pressure faces of the other pressure members 3, as shown in FIG. 1. An operating member 7, has rollers 8 and 9 at the ends thereof, and is. shiftable between the position shown in solid lines in FIG. 2, and the position shown in broken lines on the left of FIG. 2. A spring-loaded ball 21 engages corresponding recesses in operating member 7 to secure the same in the two shifted axial positions.

The lateral walls 10 and 11 carry -a pair of cams 13 on spacing bolts 12. As best seen in FIG. 1, earns 13 have a lobe 14 only in the region of the printing line CD which is formed between the printing roller 3 and a counter pressureroller 24 which is adjustable by means of an eccentric shaft. V

In the inoperative position of operating member 7, 8, 9 the cam lobes 14 do not engage the rollers 8 and 9 during rotation of the printing roller. If the operating members 7, 8, 9 of any, or of several pressure members 4 is shifted to the left as viewed in FIG. 2 to its operative position, the cam follower rollers and 9 are located in the planes of cams 13, and when the respective pressure member 3 passes through the printing line during rotation of the printing roller, the lobes 14 of cams 13 engage the rollers '8 and 9, and urge the operating member, together with the respective pressure member 3 outwardly in radial direction against the action of springs 5 and 6, so that the respective pressure member 3 is in an outwardly projecting pressing orjprinting position in which it forms a print ing line in the printing plane CD with the properly adjusted counter pressure roller 24. Pressure members which are held in the retracted positions by springs 5 and 6 do not form a printing line with counter pressure roller 24, since a space separates the pressure faces of the respective pressure members 3 from the surface of the counter pressure roller 24.

Copy sheets 25 are fed over a feeding table 59' to a pair of transporting rollers 51 and 52, while being moistened by moistening means 53. The transporting rollers 51, 52 feed the copy sheets to the bight between the printing roller 3 and the counter pressure roller 24 so that sections of the master sheet 3 pass through the printing line simultaneously with sections of the copy sheet.

The master sheet 3 is flexible, so that only a section of the master sheet below which a pressure member was advanced to the operative pressing position, is pressed against the copy sheet and produces an imprint thereon.

A clearing cam 27 is provided with an inclined surface 28, and is engaged by the end of operating member 7, 3, 9 when the same has passsed through the printing plane CD. When the inclined face 28 of a clearing cam 27 engages the end of an operating member in operative position, the same is pushed back to its inoperative position 'shown'in solid lines in FIG. 2, so that the cams 13 are l no longer located in the path of movement of the rollers 8 and 9.

During rotation of the printing roller 2, each operating member 7 in its inoperative position passes an electromagnetic control means 20 before arriving at the printing line. If the respective operating member 7 is mounted on a pressure member 3 correlated to a printing section of the master sheet which is desired to be printed, the electromagnetic means 20 is energized, and its movable armature 20a is moved to the left as viewed in FIG. 2 to engage the end of the respective operating member 7 and to push the same from its normal position to the operative position in which rollers 8 and 9 cooperate with cams 13. Consequently, selected pressure members are in the pressing or printing position when arriving at the printing line, and are capable of pressing the respective sections of the master sheet and of the copy sheet against each other. When the electromagnetic means 20 is deenergized, a spring 23 retracts the movable armature 20a.

The above described mechanical arrangement is common to both embodiments of the present invention, which also have corresponding electrical circuits for energizing the electromagnetic means 21 as will be described hereinafter in detail with reference to FIGS. 4 and 5.

In the embodiment of FIGS. 1 to 4, a master sheet shown in FIG. 3 is used. The master sheet 3 has a number of printing sections or lines which are circumferentially arranged when the master sheet is mounted on the printing roller, while the sections or lines extend in axial direction of the printing roller. Suitable text portions are provided in the printing sections of the master sheet, and are imprinted on the copy sheet when the respective printing section is urged against the copy sheet by a pressure member 4 in its pressing or printing position. The master sheet 3 has a part provided with several columns in which sets of markings 15 are marked aligned with printing sections or lines of the master sheet which are selected to be printed. A guide bar 36 of rectangular cross section extends between the side walls 10 and 11 of the machine, and slidably supports a sensing means 35, as best seen in FIGS. 1 and 2. Sensing means 35 is movable on guide bar 36 between three positions, and has a catch 37 loaded by a spring 38 to snap into corresponding recesses 39 of guide bar 36 so that three axially spaced positions of sensing means 35 are determined. Sensing means 35 is located opposite one of the columns of markings 15 in each of the three positions, as is best seen in FIG. 2. The sensing means includes a source of light 16 which illuminates the surface of the carrier part 3a of the master sheet 3, a different column of markings 15 being illuminated in each position of the sensing means. Light reflected from the carrier part 3a is received by a photocell 17, and when a marking 15 passes the sensing means, less light is reflected by the marking than by the surface of the carrier part 3a of the master sheet, so that the voltage at the anode of photocell 117 is varied, and creates an impulse which is amplified by amplifier 18, see FIG. 4,

and passes through a switch 36 which is controlled by a cams 13.

Thyratron 19 is connected to a thyratron 22 in a flipflop connection, so that thyratron 19 is extinguished after the operation of the electromagnetic means 20 so that the same is deenergized and its armature is retracted to an inoperative position by spring 23,

During the first revolution of the printing roller 2, the sensing means 35 is located opposite the first column of mar-kings 15, as shown in F-iG. 2, and consequently, the

sensing means will respond to the provided markings to produce impulses wherever a marking passes the sensing means, so that the electromagnetic control means 20, 20a renders the operating means 7, 8, 9, 13, 14 operative to move the printing member '4 located under the printing section provided with the respective marking, to its pressing or printing position. Consequently, the respective printing section is in engagement with the copy sheet when passing through the printing line, and is imprinted on the copy sheet.

In the master sheet shown in FIG. 3, the first four printing sections will be printed during the first revolution of the printing roller, since corresponding markings were provided on the master sheet adjacent the first four printing sections which were thus selected for printing. The fifth and sixth printing sections do not have markings in the first column, and consequently will not effect imprints during the first revolution of the printing roller.

Before the second revolution of the printing roller, the sensing means is shifted to its next position so that the light of the source of light 16 falls on the second column of markings so that the photocell 17 produces impulses in accordance with the markings 15 in the second column. As shown in FIG. 3, markings 15 are provided in the second column only for the first three lines or printing sections, so that imprints of the first three lines are produced during the second revolution of the printing roller. However, there is no marking provided in the fourth line or printing section of the master sheet so that the fourth line will not be printed during the second revolution of the printing roller.

During the third revolution, the sensing means 35 is shifted to its third position, and will sense the third column of markings 15, so that only the first two printing sections will be printed, followed by the sixth printing section.

Holding means, not shown, are provided in a conventional manner for holding the copy sheet immovable in the printing line while undesired printing sections of the master sheet pass through the printing line, so that the next following imprint of a selected section of the master sheet is made on the copy sheet adjacent the preceding imprint.

Every printing member 4, which is correlated to a printing section selected by a marking, is moved to its pressing or printing position when passing the electromagnetic means 20, and is ready for the printing operation when passing through the printing line. After an operative pressure member 4 has passed the printing line, and has efiected an imprint, its correlated operating member 8 is pushed back by the clearing cam 27, 28 so that respective operating member 7 can be again controlled during the following revolution by the electromagnetic means 20.

As explained above, the modified construction shown in FIGS. 5 and 6 corresponds in all mechanical parts to the duplicator shown in FIGS. 1 and 2. However, the program carrier is not a part of the master sheet, but is an independent carrier tape 31 provided with a plurality of columns of markings 32, which may be perforations. As schematically shown in FIG. 5, a transmission shaft 34 connects shaft 1 of the printing roller 2 with the transporting means for the carrier 31. This construction is best seen in FIG. 6. A bevel gear 41 is mounted on shaft 1 and meshes with the bevel gear 42 on shaft 34 which is mounted in a bearing and has at its other end another bevel gear 44 meshing with a bevel gear 43 on a shaft which carries a transporting sprocket engaging a set of transporting perforations along the edge of the carrier tape 31. A sensing means 46 preferably includes a source of light 16 and a photocell 17 and is mounted on a guide bar 47 for movement between a plurality of positions in which the sensing means cooperate with different columns of markings 32. The three columns of markings 32 form lines of markings transverse to the direction of movement of the carrier tape 31, each line being correlated with a printing section of the master sheet. The master sheet used in the embodiment of FIGS. 5 and 6 corresponds to the left part 3b of the master sheet shown in FIG. 3, with the carrier part 3a for the markings omitted.

Since the transporting means for the carrier tape 31 are connected to the printing roller movement in synchronism with the same, the markings of each column pass the sensing means 46 at the same frequency and at the same intervals, as the printing sections of the master sheet pass the electromagnetic means 20', and the printing line. Whenever the sensing means 16, 17 sense a marking, an impulse is created which passes through amplifier 18, switch 30, and effects through thyratron 19 energizing of electromagnetic means 20, as described with reference to FIG. 4. The energized electromagnetic means 2%) actuates its armature 28 to push the respective operating member 7 to its operative position so that the lobes 14 of cams 13 urge the respective printing member 4 to its printing position before reaching the printing line. Consequently, the respective selected printing section of the master sheet is imprinted on the copy sheet. When the printing member has passed beyond the printing line, its operating member is pushed to its normal position by the clearing cam 27, 28, while the springs 5 and 6 draw the printing member back to its normal retracted posias soon as the rollers 8 and 9 have passed beyond the lobes of earns 13.

During a following revolution of the printing roller 2, the sensing means 46 is placed in its second position for sensing the second column of markings 32, and during a third revolution, the third column of markings 32 may be sensed on the carrier tape 31.

It is evident that the shifting of the sensing means 35 in the embodiment of FIG. 2, and the shifting of the sensing means 46 in the embodiment of FIG. 6, can be automaticaily accomplished by a stepping mechanism controlled by the printing roller whenever the same has terminated one revolution, so that after each revolution of the printing roller, the respective sensing means is shifted one step in the direction of the arrow F to effect sensing of another set of markings.

According to a modified embodiment, a plurality of sensing means is provided, each of which cooperates with one column of markings, and a switch is provided for connecting the sensing means successively into the circuit so that at each revolution of the printing roller, a different sensing means is operative to sense the respective column of markings. Such switch may also be automatically actuated by the printing roller whenever the same completes one revolution, so that during the following revolution, the next following sensing means is operative to sense the next following column of markings controlling tllile selective priting of printing sections of the master s eet.

It will be understood that each of the elements described above, or two ore more together, may also find a useful application in other types of printing machines differing from the types described above.

While the invention has been illustrated and described as embodied in a program controlled rotary duplicator for printing selected sections of a master sheet identified by markings, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range or equivalence of the following claims.

What is claimed as new and desired' to be secured by Letters Patent is:

1. In a rotary duplicator, in combination, a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means for sensing markings; transporting means connected to said printing roller for movement in sychronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy sheet.

2. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line 'so that printing sections 'of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means forsensing markings; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier part of said master sheet having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy sheet.

3. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means *for mounting a master sheet on the periphery of said arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members,

the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressurermembers being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming :a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means for sensing markings; transmission means and transporting means connected by said transmission means to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy sheet.

4. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means for sensing markings and producing an electrical impulse when responding to a marking; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing selections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and electromagnetic control means electrically connected to and controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy'sheet.

5. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential Width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means for sensing markings and producing an electrical impulse when responding to a marking, said sensing means including a source of light illuminating the carrier, and a photocell for receiving light reflected by said carrier; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and electromagnetic control means electrically connected to and controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy sheet.

6. A duplicator as set forth in claim and including a circuit connecting said photocell with said electromagnetic control means, said circuit including two thyratrons in flip-flop connection to energize and deenergize said electromagnetic means.

7. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circurnferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means for sensing markings; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective printing section passes through the printing line; control means controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy sheet; and means for moving said pressure members to said retracted position.

8. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; operating means movable to and from an operative position for moving said pressure members to said pressing position when the same pass through the printing line; sensing means for sensing markings; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having sets of markings disposed in columns, respectively, the markings of each set being respectively correlated with selected printing sections of said master sheet, said transporting means transporting said carrier and the markings of one set of markings past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; means for selectively efiecting sensing of dilferent sets of markings by said sensing means during successive revolutions of said printing roller; and control means controlled by said sensing means, and connected to said operating means for moving the same to said operative position when said sensing means responds to a marking whereby imprints of printing sections selected by said markings are made on the copy sheet.

9. A duplicator as set forth in claim 8 including means supporting said sensing means for movement transverse to the direction of movement of said carrier between a plurality of positions in which said sensing means senses different sets of markings.

10. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; a set of operating members respectively connected to said pressure members for radial movement with the same to said pressing position, each operating member being shiftable to and from an operative position; a stationary cam means cooperating with each operating member only in said operative position for moving the same and thereby the respective pressure member radially to said pressing position when the respective pressure member passes through the printing line; sensing means for sensing markings; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means controlled by said sensing means and connected to said operating members for moving each operating member to said operative position when said sensing means responds to a marking whereby imprints of sections selected by said markings are made on the copy sheet.

11. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferential- 1y arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding -to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; a set of operating members respectively connected said pressure members for radial movement with the same to said pressing position, each operating mem her being shiftable in axial direction to and from an operative position; a stationary cam means cooperating with each operating member only in said operative position and having a lobe in the region of the printing line for moving an operating member and thereby the respective pressure member radially to said pressing position when the respective pressure member passes through the printing line; spring means connected to said pressure members for urging the same to said retracted position, and for urging said operating members toward said cam means; sensing means for sensing markings; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means including electromagnetic means controlled by said sensing means and connected .to said operating members for moving each operating member to said operative position when said sensing means responds to a marking whereby imprints of sections selected by said markings are made on the copy sheet.

12. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of .the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets .to said printing, line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; a set of operating members respectively connected ,to said pressure members for radial movement with the same to said pressing position, each operating member being shifitable inaxial direction to and from an operative position; a stationary cam means cooperating with each operating member only in said operative position and having a lobe in the region of the printing line ,for moving an operating member and thereby the respective pressure member radially to said pressing position when the respective pressure member passes through the printing line; spring means connected to said pressure members for urging the same to said retracted position, and for urging said operating members toward said cam means; sensing means for sensing markings; transporting means connected to said printing rollers for movement in synchronism with the same for transporting a carrier part of said master sheet having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means including electromagnetic means controlled by said sensing means and connected to said operating members for moving each operating member to said operative position when said sensing means responds to a marking whereby imprints of sections selected by said markings are made on the copy sheet, said control means including a stationary clearing cam for moving operating members out of said operative position.

13. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roll-er, said master sheet having circumferential- 1;; arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure member in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; a set of operating members respectively connected to said pressure members for radial movement with the same to said pressing position, each operating member being shiftable in axial direction to and from an operative position; a stationary cam means cooperating with each operating member only in said operative position and having a lobe in the region of the printing line for moving an operating member and thereby the respective pressure member radially to said pressing position when the respective pressure member passes through the printing line; spring means connected to said pressure members for urging the same to said retracted position, and for urging said operating members toward said cam means; sensing means for sensing markings; transmission means and transporting means connected by said transmission means to said printing roller for movement in synchronism with the same for transporting a carrier having markings respectively correlated with selected printing sections of said master sheet past said sensing means so that said sensing means responds to a marking when the respective selected printing section passes through the printing line; and control means including electromagnetic means controlled by said sensing means and connected to said operating members for moving each operating member to said operative position when said sensing means responds to a marking whereby imprints of sections selected by said markings are made on the copy sheet, said control means including a stationary clearing cam for moving operating members out of said operative position.

14. In a rotary duplicator, in combination a printing roller and a counter pressure roller; mounting means for mounting a master sheet on the periphery of said printing roller, said master sheet having circumferentially arranged printing sections; one of said rollers having about the periphery thereof a set of pressure members, the circumferential width of said pressure members corresponding to the circumferential width of said printing sections of the master sheet, each of said pressure members being movable between a retracted position and a radially projecting pressing position, each pressure memher in said pressing position forming a printing line with the other roller; feeding means for successively feeding copy sheets to said printing line so that printing sections of the master sheet are pressed against a copy sheet to form an imprint thereon only when the pressure member passing through the printing line is in said pressing position; a set of operating members respectively connected to said pressure members for radial movement with the same to said pressing position, each operating member being shiftable in axial direction to and from an operative position; a stationary cam means cooperating with each operating member only in said operative position and having a lobe in the region of the printing line for moving an operating member and thereby the respective pressure member radially to said pressing position when the respective pressure member passes through the printing line; spring means connected to said pressure members for urging the same to said retracted position, and for urging said operating members toward said cam means; sensing means for sensing markings; transporting means connected to said printing roller for movement in synchronism with the same for transporting a carrier having sets of markings disposed in columns, respectively, the markings of each set being respectively correlated with selected printing sections of said master sheet, said transporting means transporting said carrier and the markings of one set of markings past said sensing means so that said sensing means responds to a marking when the respective selected printin" section passes through the printing line; means for selectively effecting sensing of difierent sets of markings by said sensing means during successive revolutions of said printing roller; and control means including electromagnetic means controlled by said sensing means and connected to said operating members for moving each operating member to said operative position when said sensing means responds to a marking whereby imprints of sections selected .by said markings are made on the copy sheet, said control means including a stationary clearing cam for moving operating members out of said operative position.

15. A duplicator as set forth in claim 14 including means supporting said sensing means for movement transverse to the direction of movement of said carrier between a plurality of positions in which said sensing means senses difierent sets of markings.

Ritzerfeld Sept. 20, 1960 Bonsch Apr. 18, 1961

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2953087 *Dec 17, 1956Sep 20, 1960Ritzerfeld GerhardApparatus for automatic selective reproduction of printing forms
US2980014 *Dec 19, 1957Apr 18, 1961Block & Anderson LtdHectographic duplicating machines
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3242854 *Apr 10, 1964Mar 29, 1966Ritzerfeld GerhardProgram controlled selective printing machine
US3283701 *Nov 30, 1964Nov 8, 1966Ritzerfeld GerhardPrinting and punching machine
US3359893 *Oct 25, 1963Dec 26, 1967Zahn Hermann JosephOffset duplicator
US3470357 *Jun 5, 1964Sep 30, 1969Wilhelm RitzerfeldMethod of producing a printing form and of evaluating data contained therein
US4293629 *Oct 12, 1979Oct 6, 1981Allied Paper IncorporatedElectrostatic master and method for making the same
US4652330 *Apr 24, 1986Mar 24, 1987Smh AlcatelLabel selector for franking machines
Classifications
U.S. Classification101/132.5, 101/91, D18/50
International ClassificationB41L11/00
Cooperative ClassificationB41L11/00, B41P2700/10
European ClassificationB41L11/00