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 numberUS1562431 A
Publication typeGrant
Publication dateNov 24, 1925
Filing dateMar 24, 1922
Priority dateMar 24, 1922
Publication numberUS 1562431 A, US 1562431A, US-A-1562431, US1562431 A, US1562431A
InventorsAnanson Richard D
Original AssigneeUnderwood Typewriter Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ribbon mechanism for typewriters
US 1562431 A
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

2 Sheets-Sheet 1 R. D. ANANSON RIBBON MECHANISM FOR TYPEWRITERS Flled March 24 1922 1 r l n/(m\ \H 2 1 k W J a Nov. 24 1925 Nov. 24 1925- 1,562,431

R- D. IANANSON RIBBGN MECHANISM FOR TYPEWRITERS FiledMax ch 24, 1922 2 Sheets-Sheet 2 I'llio] r Patented Nov. 24, 1925.

UNITED STATES PATENT OFFICE.

- RICHARD D. ANANso'N, or sTIRLING, NEW JERsEY, ASSIGNOR '10 UNDERwoon' 'YrE- WRITER COMPANY, or NEW YORK, N. Y., A CORPORATION OF DELAWARE.

' 'RIBBON MECHANISM FOR TYPEWRITEBS.

Application filed March 24, 1922. Serial No. 546,305.

To all whom it may concern:

Be it known that I RICHARD D. ANANsoN, a citizen of'the United State's and resident of Stirling, in the county of Morris and State 5 of New Jersey, have invented certain new and useful Improvements in Ribbon Mechanism for Typewriters, of which the following is a specification.

' This invention relates to auxiliary rib- .bon mechanism for typewriters and more particularly to the means for mounting the ribbon spools, advancing the ribbon and sup porting it in its passage from one spool to the other.

One of the main objects of my invention is to provide an auxiliary ribbon attachment which may be readily attached to a typewriter of standard construction without necessitating alterations in the latter, and whereby the ribbon of the attachment may cooperate with the main ribbon of the machine to permit the typing of duplicate original copies from the two ribbons, and this irrespective of whether or not additional copies be made at the same time from carbon or other duplicating sheets.

Certain features of my invention are applicable for use either as parts of such an attachment, or the auxiliary ribbon mechanism may be substituted in the -machineitself, as the main or'single ribbonof the machine.

To this end, in the preferred form of the present invention, provision is made of an auxiliary ribbon frame mounted on the main frame at the back of the machine and bearing delivery and receivin spools for the auxiliary ribbon. "A. rib on-guiding arm pivoted in the upper part of the auxiliary frame extends forward over the platen and is curved downward to carry the ribbon across the printing point at the front of the platen. The auxiliary ribbon extends forward along the upper surface of said downwardly curved ribbon-guiding arm substantially at right angles to the axis of the platen, across an aperture'in the ribbon-guiding arm at the printing point and then is doubled back upon itself, and returns along the upper surface of "the ribbonrguiding arm to the receiving spool at the rear of themachine. The aux} iliary ribbon is thus rigidly supported at the "printing point and is so guided to and from the printing point that it will not tend to obstruct the advance of the work-sheets nor to smear them.

In accordance with one feature of the invention, provision is made of means for adjusting the ribbon-guiding arm lon itu: dinally of the platen to move a fresh fie d ofl-OO the ribbon, which may have a, plurality of, color fields, into 0 erative position.

The ribbon-gui mg arm is pivoted far enough to the war of the carriage so that it maybe swung up completely out of the way 66 when sheets are to be inserted .at the rear of the platen. The pivoting of the ribbonguiding arm far to the rear of the platen is advantageous also because it results in a very large moment of force tending to swing 10 the arm about its pivot and press it against the platen while permitting the actual pressure upon the platen to be Very slight. Due to' this arrangement, the ribbon-guiding arm follows the platen immediately when 76 the platen is shifted from upper-case position, thereby maintaining the ribbon in op-" erative position at all times, and this without exerting a pressure upon the work-sheets which would cause interleaved carbon-sheets 80 to smear the work. I v I The. escapement mechanism is connected to reciprocate a tooth that co-acts with a ratchet-wheel on the auxiliary ribbon-receiving spool to advance the spool step by ste as to feed the ribbon. The arrangement is suc that the pawl is moved idly on the rinting stroke of the types and returns to 'eed the ribbon on the return stroke of the. types, thus assuring that the ribbon will be stationary ,0 at the time of the printing impact. Cam means acts-to carry the, pawl out of engage,- ment with the ratchet-wheel in' the latter part of its feeding stroke, and provisionis made of means for adjusting the extent of the 06 stroke which will occur before such disengagement is effected. T f

Said cam means for disengaging the pawl and ratchet-wheel causes the pawl to be disengaged from the ratchet-wheel in its nor-' mal idle position so that it offers no obstruction to the turning of the auxiliary ribbon receiving spool in either direction. Means are provided, independently of the step-bystep ribbon-feeding mechanism, for turnmg each of the spools to wind the ribbon onto it from the other spool when desired.

, In the drawings Fig. 1 is a vertical transverse section through a portion of a standard typewriting machine and my improved attachment,

Fig. 2 is a rear elevation of the attachment', certain of the parts being shown in section,

Fig. 3 is a sectional detail on the line.

ports the platen 13 around which the paper passes during the operation of themachine. The main ribbon 14 is carried by a pair of spools (not shown) and in traveling from one to the other passes through aribbonguide or vibrator 15 adjacent a type-guide 16 through which the types move in strikin the ribbon 14 against the paper. The types 1 are carriedby type bars 18 mounted to-swing about pivots 19 and are actuated by bellv cranks 20 connected to the key levers 21. A rocker arm 22, forming part of the escapement'actuating mechanism is connected to a universal bar 22*in the path of the typep a step by step movement. 3

bars, and is also connected by mechanism, not shown, for operationby the usual spacebar, the arrangement being such that the arm 22 is 0501 lated at each letter-space movement of the carriage. There may also be provided the usual means(not shown) for feeding the main-ribbon 14 endwise with The partsso-far described are of usual construction "and are therefore illustrated only insofar as they cooperate withmy improved attachment.

The attachment includes a bracket or auxiliary frame 30 whichmay be secured to the rear or baseof the mainframe of the ma. chine in any suitable manner; As illustrated, this auxiliary fname includes a substan tiallyhorizontal plate 30 with an.upstanda ing lug 31 which maybe rigidly secured in position by suitablev screws 31'. Extending upwardly from the plate or frame portion 30' is a. standard including a' pair of side members 32 which are rigidly connected by suitablecrossbraces 33. and carry a pair of spindles 34 and 35 for ribbon spools v6 and 37. These spools may be of standard construction. The two spindles 34 and 35 are disposed parallel'and horizontal and the spools, thereon are mounted in superposed position with theend walls of one in the.

same'vertical planes as the end walls of the other. I Thefr'a'me at its upper end has a third spindle or tie rod 38, upon which is pivotally mounted the ribbon guide 39. This ribbon guide is preferably in the form of a sheet metal arm, as shown in Fig. 4 provided with an integral stifleni'ng rib 39". At the pivoted. end, the arm has oppositely vdis osed extensions 40 carryinglugs 41 bent to ie in parallel planes. These lugs ma be directly journaled on the spindle 38 a though preferably the are mounted on a sleeve 42 which is carried by the spindle or tie rod 38. The sleeve also carries a roller 43 of a width corresponding to-that of the ribbon, and of such dia'meterthat the sleeve presents shoulders to prevent edgewise movement of the ribbon in res ect to the roller. The pivotal support 0 the guide is at an elevation somewhat higher than the platen, and inthe rear thereof, and the guide extends forwardly over the platen and curves downwardly-to 'apoint on the front side thereof to the printing oint. Adjacent to the free end of the guide, the latter has an aperture 44 of a length substantially equal to the. width of theribbon. The aperture may be of any desired width, although it is illustrated asbeing substantially square. The terminal portion of the guide forms a transverse rounded bar- 45 around which the ribbon may pass, as hereinafter more articularly pointed-out Theribbon gui ing arm'39 and its aperture 44 are so positioned that'the aperture registers with the printing position of'the type. In other words, each typeas it swings into printing position passes I through the type-guide 16, the ribbon vibrator l5, and the aperture 44 of the ribbon'guide 39. For supporting the free end of'the rib,- bon guide and reducing to'the minimumfits frictional engagement withthe platen 9rthe paper on the latter, the arm 39 may have a'pair of oppositely disposed lugs 46 which.

may haivetomparativelv small projections j or rounded knobs 47. The frictional engagement of these with the laten or paper therebeneath is 'comparativdl out of engagement with the ribbonon the upper side of the ribbon guide.

thence lengthwise of the guiding arm 39 to the aperture 44., Here the ribbon passes through the aperture and around the terminal port on or bar 45, and back along the Theribbon- 50 is wound 'onone, of the spoolsfor instance, the upper spool 37, and

passes from this spoolover the roller 43 and I y small. The' protections may alsoextend upwardly-from the lugs or ears-46 so-as/to hold the paper struck.

type-bar the universal bar 22 is drawn forupper surface of the first-mentioned run of ciprocatinglink 51 which is pivoted to the rocker arm 22 of the machine, preferably by jaw 66 encircling cross pin 67 of said rocker arm and clamped closed by screw 68. At its outer end, this link has a hook or pawl portion 52 coacting as a ratchet dog with a ratchet wheel 53 which may be locked tothe lower spool 36. The dog 52 is held in operative position by means of a spring 54, whereby during the pulling movement of the link 51, the ratchet wheel 53 and the spool 36 will be rotated while the dog may ratchet over the teeth durin the return movement of the link. Prefera ly the link 51 is provided with an integral lug 6U pressed by spring 54 againsta stationary pin 61. The lug is widened at its end as at 63 to shift dog 52 downward out of contact with ratchet teeth 53 during the remainder of the stroke of link 51 in the operative direction after completion of the feedin step. The link is, moreover, provided wit a turnbuckle 64 by which its length and consequently, the length of the ribbon feed steps can be adjusted. Return rotation of the ratchet wheel may be prevented by a suitable dog or pawl pivoted to cross-bar 33 and over-running of the spool may be prevented'by a spring friction brake 56, also mounted on cross-bar 33. The upper spool 37 may also have a friction brake 57 pressing against the ribbon thereon, thus preventing the unwinding of the ribbon from the spool, except at such rate as is required by the positive rotation of the lower spool. The type-bars 18 engage the universal bar 22 as they near the printing point, and this in turn rocks the arm 22 to move the link 51 to the rear. The rearward movement of the link 51 is an idle movement, however, so that the ribbon 50 remains stationary until after the type has During the return stroke of the ward by a spring (not shown) to rock the arm 22 forward and actuate the link 51 to feed the ribbon 50.

' parts.

5, and c, of different colors, as shown in Fig. 5. In order to bring the sections of different colors into operative position or to permit the different sections tobe fully utilized if the ribbon be of a single color, I provide means whereby the ribbon guide 39 may be shifted endwise of the supporting rod 38. This is shown particularly in Fig. 6. The rod is shown as being provided with a plurality of parallel transverse holes 59, any one of which may receive a locking pin 60' carried by the sleeve 42 and passing through corresponding apertures therein. lVith the pin in one hole, as shown in Fig. 6, one edge portion of the ribbon will be in operative position in respect to the type. By moving the pin to the next hole 59, the center portion of the ribbon will come into play, and by moving it to the third hole, the other edge portion will come into operation. Of course, a

greater or lesser number of adjustmentsthan' shown may be provided.

For feeding the ribbon .at will endwise independently of the normal step by step feeding movement,-or for returning the ribbon to the upperv spool 37 after it has passed through operative position to the lower spool, I provide means whereby either spool may be rotated in either direction at will. As shown, the upperspindle 35 has a clutch collar 62 and a crank 63', the clutch being normally held out of operative position by means of a coil spring 64. A spring 66"- bears against the clutch to maintain the spindle 35 in its bearings. The lower spindle 34 has a clutch collar 65 which may be rigid with the ratchet wheel 53 and which is normally held in looking engagement with the spool 36 by a coil spring 66. This spindle also has a crank 67. The pawl 52 is held out of engagement with the ratchet-wheel 53 by pin 61, in the idle positions of the After engaging the clutch 62 and lifting the pawl 55 .by depressing finger piece 55, therefore, the operator may rotate the upper spool to return the ribbon from y the lower one. With the parts in normal. position as shown in Fig. 2, the lower spool portion of the ribbon'to it, from the upper spool. The spindles 35 and 34 may be moved endwise against the force of their springs 66" and 66' sufficiently to permit new spools to be substituted upon-them, when desired, the springs 56 and 57 being sufficiently flexible to bend back clear of the flanges of said spools.

In the use of my improved device, it will be noted that the auxiliary or. supplemental ribbon has a portion at the rinting point on the platen, and that the ribbon is advanced with a step by step movement during the operation of the machine, so as to continually bring fresh portions of the strip. By shifting the guide 39 along the ribbon into play, and that this positioning and feeding of the auxiliary ribbon is inde-.

pendent of the main ribbon. It will also be noted that two thicknesses of the ribbon" and 'B may be caused to extend over the ribbon guide 39 and the sheet C may be caused to extend beneath it, as shown in .Ifigfl. When the machine is operated the types will strike the main ribbon I i, to

print on the outer sheet A. At the same time, the outer surface of the ribbon 50 at the aperture 44 will print. with mirror script against the rear or under side of the sheet B. Theother 'or under layer of the ribbon 50 will print direct-ly'fon the outer or front surface of the sheet C. I Thus, there will be produced two original copies made directly from the two ribbons on the two sheets A and C. There will alsobe produced the mirror script copy on sheet B. This sheet should be of onion skin paper or other such translucent material as will permit the typewriting to be read through the sheet from the front surface." Inasmuch as this is in mirror script, which cannot be produced with an ordinary typewriter,

directly from the ribbon, it will be apparent that such a cop cannot be altered on any ordinary typewr1ter,and therefore, constitutes a permanent record of the subjectmatter as originally typed. Obviously, where the mirror script copy is not requn-ed, a single intermediate sheet could be used indefinitely to'take the imprint from the forward run of ribbon 50, thus maintaining the rear of sheet A clean.

If at any time it is desired, to. use the typewriter without the auxiliary ribbon attachment, it is not necessary to remove the latter from the machine, but the ribbon guide 39 need merely be shifted to the rear about its-pivot.

It will, of course, be evident that any desired number of supplementary sheets with interposed layers of carbon orother reproducing material may be employed between the sheet C and the platen,-as in the ordinary use of a typewriting machine. Furthermore, the ribbon 50, instead of being an inked ribbon, may be a plain strip of paper, and by omitting the sheets A' and'B, or by substituting carbon paper for the sheet B,

the typed matter will appear on 'the strip of paper which is used in place of the ribhon 50, and this typed subject-matter will form one continuous line lengthwise of the spindle or support 38, after the length of the strip has been fed past the type, a second such line and then a third may be typed on the strip. If desired, a strip of paper, preferably translucent, may be used in place of ribbon 14, upon which ribbon 50 would print a continuous mirror script record, which can readily be\ read through the paper.

Inasmuch as the guide 39 of the ribbon 50 extends in a direction at substantially right angles tovthe axis of the platen, and transversely of the direction of endwise movement of the platen, only a comparatively narrow width of guide and ribbon are exposed for frictional engagement with the paper, and the resistance to the endwise movementof the platen is very much less than in the case where the auxiliary or interposed ribbon extends lengthwise of the platen along substantially the full Width of the superposed sheets. Due to the fact that the guide and the ribbon extend longitudinally of. the paper, rotation of the platen for line feeding will not shift nor twist the run of ribbon laterally, as may sometimes occur where the" ribbon runs parallel to the platen. Furthermore, the ribbon is fir 1y supported at the printing point, so tiliat there is no danger of displacing the ribbon during a rotation of the platen, as is the case where such ribbon extendslengthwise of the platen'and is unsupported at the I printing point. 7

It Wlll be seenthat the heights of the letter impressions extend longitudinally of ribbon 50, so that there is no ossibility of striking the tops or bottoms o the type beyond the edge of the ribbon, and thereby printing buta fraction of the letter, as may sometimes occur where the transverse ribbon is used on its extreme upperor lower setting in the former case, particularly in printing capitals.

It will, of course, be obvious that, if de- -sired,the auxiliary ribbon attachment, may

be permanently built into the typewriter as a part thereof, instead of, or in additionito the conventional ribbon mechanism. It will further be apparent that in either case, the

common type of ribbon shift key may be provided instead of the means shown in Fig. 6.

It will thus be seen that there is herein described apparatus in which the several features of this invention are embodied, and which apparatus in its action attains the various objects of the invention and is well suited to meet the requirements of practical use.

Variations may-be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, what 1 l claim as new and desire to secure by Let instrumentalities to print through a main ill ters-Patent is: r

i, In a typewriting machine, the combination with a main frame, a carriage thereon, a platen on said carriage and printing ribbon against said platen, of means to conduct an auxiliary ribbon from the delivery side of the platen to the printing point and between work-sheetssaid means including a ribbon-guide supported on the main frame, said guide being fiat and thin at its free end so that it may extend between the worksheets without disturbing their'printing relation and in a direction opposite towhich the work-sheetshrc fed around the platen, and means to feed said auxiliary ribbon. 2. In a'front-strike typew-riting machine, the combination with a main frame, a carriage thereon, a platen on said carriage and printing instrumentalities to print through a main ribbon against said platen, of means to conduct an auxiliary ribbon from the delivery side of the platen to the printing point and between work-sheets, said means including a pair of ribbon-spools at the rear of the machine, and a ribbon-guide to con: duct the auxiliary ribbon at right angles to the main ribbon. said ribbon-guide being supported on the main frame andextending between the work-sheets to conduct the auxiliary ribbon to the printing point, and means to feed said auxiliary ribbon.

3. An attachment for a typewriter having a platen, type carriers and a ribbon ex tending lengthwise of the platen, said at tachment including a ribbon guide projecting over and downwardly in front of'the platen and having an aperturetherein adiacent to the end thereof, and. means for causing a ribbon to pass along the upper surface of said guide. through said aperture and back along the upper side of the guide. 4. In a front-strike typewritingr machine.

the combination of a platen around which an outer -work-sheet and an inner,work-sheet may be fed. means to vibrate a main ribbon in front of the outersheet, a stationary ribbon-guide extending over the platen and down at the front thereof to the print in; point and between the work-sheets to guide an auxiliary ribbon to the printing point, and feeding means for said ribbons, one, ofsaid ribbons extending perpendicularlv to-the other.

5. In a 'typewriting machine. the combination of a-platen. ribbon-spools arranged in the same vertical plane behind the platen and perpendicularly thereto. a ribbon-guide extendine from the spools over the platen to the printinn' point to quide the ribbon from the spools to said printing point, and means to adiust the ribbon-guide sidewise to vary the printing'field of the ribbon.

6. A typewriter having an arm provided with an aperture adjacent to the free end thereofand registering with the printing; positionof the type, the termina-i portion of said arm serying to support the loop of a ribbon with the runs of the 'ribbon to and from said loop, along one and the same. surface of the arm and one run ex tending through said aperture.

7. A typewriter having an arm provided with an aperture adjacent to the free end thereof and registering with the print ing position of the type, the terminal portion of said arm serving to support the loop ofa ribbon with the runs of the ribbon to and from said loop, along one and the same surface of the arm and one run extending through. said aperture, and means for advancing said ribbon'step by step in the direction of its length.

8. A typewriter having an arm projecting forwardly and curved downwardly over the platen and having an aperture adjacent to the .free end thereof and registering with the printing position of the type, the termi nal. portions of said arm serving to support the loop of a ribbon with the runs of the ribbon to and from said loop in superposc position along said arm, and one run extending through said aperture.

9. A typewriter having a ribbon guide provided with an aperture registering with the printing position of the type and the terminal portion of said guide serving to support the loop of a ribbon with the runs of the ribbon to and from said loop lengthwise of the guide in superposed position, and means for holding separate strips of paper adjacent to the opposite sides of the two runs of the ribbon at said aperture,

whereby both sheets may be printed on smiultaneously.

10, A. typewriter having a ribbon guide presenting! cu aperture and a terminal por-- tion around which the ribbon may pass with separate runs of the ribbon in superposed relationship at said aperture, and means for holding: said guide between separate .sheets of paper, whereby both runs'of the ribbon are in operative position in respect to said sheets at said aperture.

11. A typewriter having a ribbon guidthe rear of the frame of a standard tgpe mg writer. said attachment frame inclu supports for a pair of ribbon spools, means adapted for connection to the pperating mechanism of the typewritenfor automatthe operative stroke of the pawl to conically rotating one of said spools step by step during operation of the machine, and a ribbon guide extending forwardly over the platen, and then downwardly-to "the printing point to conduct the ribbon from the spools to the printing point, said ribbon guide having an aperture through which the printing takes place;

13. An attachment for typewriters including a frame having a pair of standards, parallel spindles carried thereby for supporting ribbon spools, a ribbon guiding arm pivoted to said frame and presenting a part around which the ribbon passes froinone spool to the other. and means for ad ust ing said arm in the direction of the axis of said spools independently of the latter.

14.- An attachment for typewriters including an'auxiliarvframe, means for supporting a pair of ribbon-spools thereon, a guide around which the ribbon passes from one spool to the otherandserving to support a portion of the ribbon in operative position with respect to the rintingpoint of the machine, a ratchet-w eel connected to .one of the'spools, a link arranged to be connected to the operating mechanism of the typewriter and having a tooth for engaging and feeding said ratchet-wheel,

' means for holding the tooth out of engagement with the ratchet-wheel whilethe link is in its inoperated position, and means for yieldin 'ly pressing the tooth into engagement w1th the ratchet-wheel during the operative stroke of the tooth in the direction along the periphery of the ratchet-wheel.

15. In a typewriting machine, a ribbon, a pair of ribbon-spools and ribbon-feeding mechanism comprising aratchet-wheel connected to rotate one of the spools, a pawl movable to rotate the ratchet-wheel step by step, a link connected to said pawl, operating means for the pawl, a cam to disengage the pawl and ratchet-wheel during trol the extent of ribbon-feeding, and means adjustable onsaid link to vary the stage at which the pawl is withdrawn from engagement with the ratchet-wheel and thereby to vary the extent of ribbomfeeding.

16. In a typewriting machine. in combination, a ribbon, delivery and receiving spools therefor, a ratchet-wheel connected to rotate the receiving spool to feed the ribs gge t,

17. In a typewriting machine, in combination, a ribbon, delivery and receiving ribboirspools, a ratchet-wheel connected to rotate the receiving spool to feed the ribbon, a reciprocable link having a tooth to rotate the ratchet-wheel step by step, a .s ring yieldingly pressing the tooth towaro the ratchet-wheel, a cam to disengage the tooth from the ratchet-wheel during the operative stroke of the link to controlthe extent of ribbon-feeding, andmeans for adjusting the effective lengthof the link to vary the stage at which the cam will'become effective.

18. In a typewriting machine, in combination, a ribbon, delivery and receiving ribbon-spools, a ratchet-wheel connected to 1'0- taie the receiving spool to feed the ribbon, a reciprocable link having a tooth to retate the ratchet-wheel step by step, a spring yieldingly pressing the tooth toward the ratchet-wheel, and means operating on the link to disengage the tooth from the ratchetwheel during the operative stroke of the link to control the extent of ribbon-feeding, the link including a turn buckle to adjust its length to vary the stage at which the disengaging means becomes effective.

19. In a typewriting machine, in combination, a ribbon, delivery and receiving ribbon-spools, a ratchet-wheel connected to rotate the receiving spool to feed the ribbon, a reciprocable member for rotating the -ratchet-wheel step by step, an escapementactuating frame to which Said reciprocable member is connected, said reciprocable member being movable in one direction idly and in the other direction to advance the ratchet-wheel, the movement of the escapement-actuating frame being greater than that required to advance the ratchet-wheel, and means to withdraw the reciprocabl'e member' from the ratchet-wheel during its operative stroke and prior to reaching normal to limit the extent of ribbon-feed at each stroke.

20. In a typewriting machine, a ribbon, delivery and receiving spools therefor, a spindle on which the delivery spool is mounted, a clutch on the spindle for rotating the delivery spool to wind the ribbon back from the receiving spool,v a spring urging the spindle in the direction to disengage the clutch,'and a second spring urging the spindle in the opposite direction to maintain the spindle in its bearings, the spindle being normally balanced between the two springs in position to hold the clutch disengaged, the construction and arrangement being such that the spindle may be thrust lengthwise in one direction against the force of the first-mentioned spring to engage the clutch with the delivery spool and may be also thrust in the opposite direction against the force of the second-mentioned spring to withdraw it from one of its bearings sufficiently to permit the removal. of the spool from the spindle. I

- 21. In a-typewriting machine, a frame,- a traveling carriage, a" platen in the carriage shiftable between lower case and upper case writing positions, ribbon-carrying means mounted on the frame independently of the carriage and to the rear thereof, and :1 ribbon-guide extendingforward over the platen to guide the ribbon to the printing point, the

ribbon-guide being pivotally, mounted beyond the rear of the carriage to be swung up out of the way when work-sheets are being inserted around the platen and to permit the forward end of theguide to participate-in the up' =and-down movement of the platen in case shifting, the pivot of the ribbon-guide above and clear of the platen carriage to t e region of type impact a manifolding member carried by said arm-and adapted to bemoved thereby into and out of functional position 'in'the line of typle impact, between the Sheets of paper to e typed; and means dependent upon the operation of. the machine in.'typing,

for varying the surface point of the meme folding member exposed to the type impact. 23. A manifolding attachment for typewriters comprising a movable arm mounted upon a 'statlonary portion of the-machineframe and' thence extending above and clear fof the platen carriage to the region oftype y impact; a manifoldlng member carried said armand adapted to be moved thereby into and out of functional position in the line of type impact, between the sheets of paper to be-typed; and means actuated by the word-spacing bar of .the machine". forvaryin'gthe surface point of the manifold ing member exposed to the type impact.

Signed at New York' in the county of New York and State of New York this 23rd day of Mmh, 1922 A. D. a

. RICHARD-D. Manson

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2467880 *Oct 24, 1945Apr 19, 1949Imp Typewriter Co LtdGuide means for typewriter ribbons
US2869705 *Jul 5, 1957Jan 20, 1959Gates Jr Eugene HOutboard ribbon supply apparatus for typewriters
US3432022 *Apr 21, 1966Mar 11, 1969Anker Werke AgMultiple-color printing structure for bookkeeping machines and the like
US5688057 *Oct 6, 1995Nov 18, 1997Twigs, Inc.Method of printing using dual opposing printheads
Classifications
U.S. Classification400/206, 400/224.1, 400/217.1, 400/189, 400/248
International ClassificationB41J35/22
Cooperative ClassificationB41J35/22
European ClassificationB41J35/22