US970028A - Ribbon-feeding mechanism. - Google Patents

Description

J. S. DUN 0 AN. .RIBBON FEEDING MECHANISM.

. APPLICATION FILED-APB. 6, 1910. 970,028. Patented Sept.13,1910.

6 SHEETS-SHEET 1.

J. S. DUNCAN.

RIBBON FEEDING MECHANISM.

APPLICATION FILED APR. 6, 1910.

Patented Sept 13, 1910.

' 6 SHEETS-SHEET 2.

J.S.DUNGAN RIBBON FEEDING MEOHANISM.

APPFIQATION FILED APB-.6, 1910.

5 SHEETS-SHEET}.

J. S. DUNCAN.

RIBBON FEEDING MECHANISM.

74 I r I J.- S. DUNCAN.

RIBBON FEEDING MECHANISM. APPLICATION FILED APR. 6, 1910.

' 970,028. Patented Sept 13,1910.

BEBEETE-EHEET a.

. To all whom it may concern: I

UNITED STATES PATENT ()FFICE. aosrirn s. DUNCAN, or CHICAGO, ILLINOIS, ss'sxsnon 'ro knnrmssoenarn COMPANY,

or crncaeo, IL INoIsa conronarron 0 ILLINOIS.

\ RIBBON-FEEDING MECHANISM.

Be it'known that I, JOSEPH S.-D UNoA-N, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ribbon-Feeding Mechtion. 4 V

Thisinventioi relates in general to rib bon "feeding mechanisms and more particu larly tomechanisms of this kind which are adapted for use inconnec'tion with addressing machines.- In machines of this character the addresses are setup in type in suitable holders or produced on plates and fed one at aftime from a magazine to a printing anisi'ns,of which the following is a specifica position.

with the printing plate It is an object of my invention to provide improvedm eans for feeding andreversing the direction of the feeding of the inking I ribbon.

Another object of my invention is to so ada t the ribbon feeding mechanism that it sha 1 be capable of use in connection with'a machine'em'ploying rotary platens, between which the inking ribbon and the printing plates are adapted to be fed; and to preventabrasion of the ribbon bythe rotating latensI have provided mechanism wherey the ribbon rollsma be moved bodily tween the platens at the time that the printing operation takes place. 1

Still another object of my invention is to provide simple and effective means for reversing the feeding operation when the ribbon shall have been substantially exhausted from one of the ribbon rolls.

- all sliding frictional resistance is obviated.

Still another object is to so mountuthe ribbon rolls that they shall be capable of independent transverse'movement in a vertical plane, and to r-ovide mechanism which shall be control ed by the position of the rolls to set-in operationt-he feed reversing mechanism.

Additional aims and objects wili become Speciflcati on of Letters Patent. Patented Application filer Apri1 6, 1910. Serial No. 553,738. I

the m Sept. '13, 1910.

apparent asthe invention is better under:

stood by reference to the following description when taken in connection with the ac-. eompanying drawings illustrating a preferred embodiment thereof.

Referring to the drawings-Figure 1 ,is a plan View showing as much of the addressmg machine as is considered necessary for an understanding of the adaptation andoperation of the invention. .Fig. 2 is-a side elevation looking toward the leftxin Fig.1. Fig. 3 is a section on the line 33 of Fig. 1. Fig. 4 is a section similar to Fig. 3"but showing the ribbon feeding and reversing mechanisms in a different position. .:Fig. 5 is a detail elevation of the doublecam and levers for impartin a reciprocatory movement to the rlbbon Feedingmechanism. Fig.

6 1s a view similar to Fig. 3 with some of the parts omitted, and showing the parts in a position assumed during the reversingoporation. the reversing operation as completed. Fig. 8- is a sectionon the line 88 of Fig. 1. Fig. 9 is a section on the line 99 of Fig. 3, and, Fig. 10 is a section on the line 10'10 of Fig. 1. 3

-,In the articular embodiment of the invention il ustrated in the drawings, 11 represents the frame of the machine at the delivery end thereof; 12 is a portion of the, frame between the printing mechanism and the magazine (not shown); and 1313 are side pieces connecting the magazine and de livery end 'of the machine, "and provided ,with a grooved track in which the chain carrier 14 is adapted to travel. r The printing plates, which may be of any "well known'type upon which the addresses are provided, are stacked in a magazine (not shown) at the right end of the machine, and .2, and are carried by'the chain carrier 14 provided with suitable engaging members disposed upon its upper side, from Fig. 7 is a similar view showing azin'e at regular intervals, beneath the inking ribbon 15 and. between the upper and lower platens l6 and 17, respecth ely. The envelope or other articles to be printed are fed between the upper platen and the inking ribbon simultaneously with the pasv 'sageof a printing plate between the platens,

in printing position one above the other.

The upper platen is carried upon a drive shaft 20 having a spur-gear 21 secured upon one end thereof, preferably by a set-screw 22. The lower platen is secured upon the shaft 23 having the gear 24 which is driven from the gear 21 through the intermediary of the idlers 25 and 26, as shown in Fig. 2.

The gears connecting'the upper andlower platens are so proportioned that the platens rotate at the same rateof speedto bring the printing segments 18 and 19 in alinementone with the other at each rotation'of the platens. The carrier chain 14 is driven at the same linear speed as the perimeters of theplatens between which it runs by means of a sprocket wheel 27 secured upon the shaft 28,. which shaft is driven by means of agear 29 adapted to mesh with the idler 26..

All of i the above mentioned shafts are mounted in suitable'bearings in the side members of they machine frame.

\ The ribbon 15 is wound at either end 11 onrear roll 30 and a front roll 31. he movement of the ribbon andthe rolls bodily with the printing plate during the printing operation, is accomplished by mounting the rolls in a frame which is supported so as to be capable of a 'reciprocatory movement. The frame comprises the longitudinally extending side members 32, Figs. 3, 1,8, and 9, secured at their forward ends to the end member The. end member 33 comprises .a flat base portion having upwardly ex tending arms 34L. at its forward side, providing bearings for the rod 35 upon which is pivotally supported the frame 36 having forwardlyextending arms 37 and 38 be tween which the roll 31 is rotatably mounted. lt willbe evident that the roll is capa-- ble of a swinging movement in a vertical The. plate 33 is provided at either side on its lower surface, with flat bearing portions plane about the rod 35 as a center.

adapted to rest upon and be supported by thecurved shoes 39 upon the. upper end of the supporting arms 40, pivotally mounted at l1 on the frame of themachine so as to be eapaliple of an oscillatery movement about their pivotal bearings. In order to main.- iuinithe launche 33 imposition upon the shoes 39 inks areprovidedwhich are piveiuily rftll'llltumriiul' fi the shoe at 43 and to jections $6 from the supporting arms 40,

.yieldingly retain the member 33 in position upon the shoes 39 while permitting a slight vertical movement as the arms oscillate back and forth. The shoes39 are curved substantially on an arc struck from the point 41 as a center so that the members 33 reciprocate substantially in a right line as the sup porting arms oscillate back and forth.

The end member 34 which is secured to the other ends of the side members 32, is likewise provided with upwardly extending portions 47 serving as bearings ,'for the frame 48 ,pivotally mounted therein and having rearwardly, extendingarms 49 be tween which thefroll 30 is rotatably mount ed. The end member 34 is alsoadapted to be carried upon the upper ends of arms. 50 secured upon the rock-shaft 51, which is mounted to oscillate in' bearings in arms 52 extending downwardly from the main frame of the machine, as shown in Fig. 9. A (:01- lar 53 secured upon the rock-shaft by means of a set-screw 54 prevents the shaft from ing Fig. 9. The arms 50 are provided with curved shoes 55 at'their upper ends upon longitudinal displacement to the right, view- 1 which the lower surfaces of-the end member 34 are adapted to be supported.v The shoes and the member 34: are connected to gether by links 56 pivoted to the shoes at 57 H springs 59 secured'to the end member at 58 1 and to the supporting arms at 50,. yieldingly maintain the end members and the supporting arms in eotiperative relation.

It will be evident that an ,oscillatory .movement of the arms 40 and 50 about their pivotal centers, will impart a reciprocat'ory secured thereon" a double cam comprising the 'member 65 adaptedgto coiiperate with the arm 61' and the memberfifi adaptedto cooperate withthe arm 63.. a The cams are so shaped that they will impart positive oscillationto the rock-shaft 51 throughsthe double-armed lever mounted .on the shaft.

and to the end member at 58, and tension The double cam is adjustable upon the shaft 23 and is normally held adjusted position by the set-screw 67.- The/cam, when properly adjusted, is adapted to impart an oscillatory movement to the shaft 51in a counterclockwise direction; thusmoving theinking ribbon andv rolls to the left, viewing 1' I 1104:, at the timethat the segments 18 and 19 on the platens are in printing relation one to the other. After the printing segments have separated in the further rotation of the platens, the double-cam returns the inking ribbon and rolls to their normal position shown in Fig. 2.

At each reciprocation of the ribbon rolls, as above described, the ribbon is fed from one roll onto the other by the mechanism which will now" be'described. A curved link 68 is 1 pivotally mounted at one end on the frame sionspring 74: secured to the pawl at one end and to a lateral extension 75 from the link at its other end. It will be evident that as the ribbon is moved to the left from the position shown in Fig. 3, that the roll 30 will swing in an are about the lower end of the link 70, and that the pawl 73 will slide back over the teeth of the ratchet-wheel 72 until it assumes the position shown in'Fig. 4, when the ribbon carrying frame has reached the extreme limit of its movement toward the left. When the frame is moved to the rightfromthe position shown in Fig. 4, the ratchet-wheel traveling .in a greater are than the pawl 73, will be rotated by the pawl, thereby winding the ribbon from the roll 31 onto the roll 30. A curved link 76 is pivotally connected at one end to the link 70, and is pivotally attached at its other end to one end of a link 77 loosely mounted on the shaft 78 carrying the roll 31. A pawl 79 is pivotally mounted upon the pin 80, connecting links 76 and 77 and is normally held in operative engagement with a. ratchet-wheel 81 secured upon the shaft 78 by a spring 82 (Fig. 1), engaging with an arm extending outwardly from the pawl. The oscillation of the link about its pivotal connectionwith the link 68, will impart a similar oscillatory movement to the link 77 through the intermediary of the connecting link 76, and the pawl 79 engaging with the teeth of the ratchet-wheel 81, will rotate the roll 31 to wind the ribbon thereon at each oscillation.

Since the pawl 73 is adapted to actuate,

the roll 30 to wind the ribbon thereon from the roll 31, and the'pa'wl 79 is adapted to actuate the roll 31' to unwind the ribbon from the roll 30 and onto the roll 31,. it is necessarythat one of the pawls be ma1ntained in inoperative -position during the winding operation bythe other pawl. For the purpose of alternately permitting the operation of the Ie-s} )i:Ct1Ve pawls to wind Upon the shaft 71 outside the ratchet-- wheel 72, there is pivot-ally mounted "a. bell crank member 83, the end of one arm being projected laterally to provide a bearing shoulder 84, the other and shorter arm being'pivotal-ly connected to a link 85 having its end bent outwardly, as'at 86, into'the' plane of an abutment pin 87 flattened on its front face, as at 88, which is secured in a. hollow stud 89 on the main frame by means of a set-screw 90. The abutment pin may adjusted vertically by loosening the setscrew 90 to bring the upper end of the pin to the proper height. A cam sector 91 is made integral with the bell-crank member and isadapted to engage with a'laterally projecting pin 92 on the pawl 73- to withdraw the pawl from engagement with the ratchet-wheel 72, when the: bell-crank member assumes the position shown in Figs. 3

and 4. The other. end of thelink 85 is piv' ot'ally connected to the shorter arm of a bellcrank member 93, loosely mounted on the shaft 78 carrying the ribbon roll 31, the

outer end of the longer arm of the bell-crank member being laterally projected at' 93 to provide a bearing shoulder similar to the shoulder 8i on the bell-crank member The bell-crank *member 93 is also provided with a cam sector 94 adapted'when the bellcrank .lever is rotated-into the position shown in Fig. 7, to engage with the laterally projecting pin'95 on the pawl 7 9, andmaintain said pawl out of operative engagement with the ratchet-wheel 81. An abutment pin 95 having a Hat rear surface 96, isadjustably held in a socket .97 by means of a set-screw 98, and is disposed in the'path of thefoutwardly bent'end 99 of the link 85. l

A tension spring 100' is connected at one end to a laterally extending lug 101 on the long arm of the bell-crank lever,"and at its other end to the end of the rod 35. This spring is adapted to maintain the reversing mechanism in either the position shown in F ig.. 3 or the position shown in Fig. 7. \Vhen the parts are in the position shown in Fig. 3, the shoulder 84 engaging with the top of the link 85 prevents further rotation of the bell-crank members under the influence of the spring 100, and when the parts are in the position shown in Fig. 7, the

shoulder 93 on the-bell-crank member 93 performs a s milar function and prevents shown in Fig. 3, thereversing mechanism being held in that position by the spring 100, the cam 94 is withdrawn from beneath the pawl 79, permitting it to engage with the teeth of the ratchet-wheel 81, while the forward movement in the oppositedi'rection under the influence of the'spring 100. Assumlng the parts to be in. the position.

cam 91 on the bell-crank'member 83 is in engagement, with the pin 92 on the pawl '73 withholding-it from operative engagement with the ratchet-wheel v72. As the whole feeding mechanismis now moved to the left by the oscillation of the rock-shaft 51, the ribbon rolls 30 and 31 which are relatively fixedly mounted on the ribbon carrging frame, move a greater distance than t e pivotal connection between the links 70 and 76. -Since the link 76 is pivotal! .oon-

nected to theouter end ofthe link 7 and since the pawl 79 ismounted at the pivotal connection 80 between these two links, it will be evident that the roll 31 will travel to the left farther relatively than the point 80, and the arts will assume the position indicated in ig. a, the pawl 7 9 having been moved in.:a clockwise direction, looking at Fig. 4, relatively to the ratchet-wheel 81. When the ribbon carrying mechanism is now moved to the right, the ratchet-wheel ,81

' ported u on the transversely extending portion of t e member 47 upon which the tom. of the roll rests. wound from the roll it gradually decreases in size audits shaft 71 swings downwardly about the pivotal point 48". The height of the abutment pin 87 is so adjusted that the outwardly bent end.86 of the link 76, will pass over the end of the pin as the ribbon carrying mechanism reci rocates, until the bell-crankmembers 83 and 93 will be turned llpon their axes from the positionshown in l 3 to the position shown in Fig. 7. Fig. 6 s owsthe position of the parts after the ribbon on the roll 31 has iecome practicall exhausted. The shaft 71has lowered su ciently upon the practical exhaustion of the ribbon, to bring the outwardlybent end 86 below the topof the abutment pin 87f As be evident from-the drawings, the top of the pin is slanted rearwardly so that if the end 86 should en age with the top of the pin when the mec ianis'm is moving toward the right, it will simply slide up'over the pin and drop ofi without producing any re sult. 'If, however, the end 86 engages the flat front face of the abutment 87 when the mechanism istraveling towardthe left, the

bentend 86has enga' d the abutment and the mechanism is sti moving toward the left, the reversing operation having been partially completed. The turningof the velo of the present invention. 1 the ribbon is un- I adapted to 006 bell-crank members on their axes withdraws the cam 91 from operative engagementwith the pawl 7 3, permitting it to engage with the teeth of the ratchet-wheel 7 2, while the movement of the. bell crank member 93 brings the cam '94: into operative engage ment with the awl 79 and raises it from its operative relatlon to the ratchet-wheel 91. As the ribbon carrying frame continues to reciprocatc,the ribbon will now be wound from the roll 31 onto the roll 30 by means of the pawl 73 cooperating with the ratchet-wheel When the ribbon has been practically all wound u on the roll 30 and the roll 31 is substantia ly exhausted, thebent end 99 of the link 85 will'be lowered-sufliciently to engage the rear faced the abutment pin 95' in the same manner that the bent end 86 engages the front face of the abutment pin 87 upon depletion of the roll 30. Engagement the bent end 99 with the abutment 95, before the ribbon feeding mechanism has reached the limit of its movement to the right, will move the parts from the position shown in Fig". 7 to the position shown in Fig. 3, thus reversing the ribbon feeding operatic. f I v f The envelope or other articles to be printed may be supported in front of the upper platen in any suitable manner, and may be automatically fed between the platens, or

theymay be manually inserted therebetween, the particular means for delivering the en-. to feeding position forming no part I have shown, 1 and 10, mechanism rate with the 11 per platen roll to draw 't e envelope or otherarticles into printing position after they have been placed in feedm position,

Beferring to 1%. 10, the shaft 23 has suitably mounted t ereon, a cam 102 which s maintained in 'adipsted position by means of a collar 103 whic en ges with the shaft and is held in position t ereon by means of however; m Figs.

a clampmut 104. A frame 105 pivotally.

secured to the main frame of the machine 106, 1s provided at one end with a roll 107 adapts to travel upon the cam 102. A plurahty of feedin ,rolls 108 are carried upon a shaft 108 in t e frame beyond the pivotal point 106, so that. they will be yieldingly pressed against the faceof the platen 16 by l the tension spring 109 whenever the roll 10 7 1 rides into the low part of the cam 102. The shaft 108' is driven by agear 113 securing the outer end thereof and meshing with an idler 11 1 integ gil with an idler 115' adapted to be driven m the gear 24. In order to permit the movement of the rolls 108toward and from the platen, that part of the shaft 108' between the frame 105 and the bearing 116 on the main frame, is composed of a series of'universal connections to give the required flexibility thereto. A pluralprinting segments of the platens are-post tioned in the proper relative relation. The

cam 102 is so adjusted onthe shaft that the low part thereof will pass under -.the roll 107 just before the printing plate carried by the carrier chain enters between the platens. The frame .105 is rotated u on its pivots 106 by the spring 109 to bring the roll 108 into engagement with the platen to feed an envelop forward, and simultaneously.

the inner end of the curved fingers are withdrawn from engagement with the platen by the lifting ofthe rod 111 as the frame 105 is tilted.

.It will be obvious that the printing segments of the platens, the envelops,v the rib boil, and ribbon feeding mechanism, and

the printing plateon the carrier chain, all move. rearwardly during the printing operation at the same rate of speed. After the printing operationthe envelop is delivered by any .suitable mechanism to a delivery rack or carrier. I have shown for the purposes of illustration merely, a portion of a delivery mechanism comprising a plurality of belts 116 passing around rolls on on the shaft 23 and engaging with the lower side of the upper platen. .The envelops when fed from the platen will be carried by the belts and delivered to any suitable rece tacle. y

\ hilezI have shown-and described a preferred embodiment of my invention, it will be obvious that various minor mechanical changes may be resorted to without depart in from the spirit of the invention or sacri cin any. of the material advantages thereof. I I

What I claim is:

1. In a ribbon feeding mechanism, the

combination of apair of ribbon rolls mounted to move in a'direction transverse to their axes, means for feeding the ribbon from one rollonto the other, and means con trolled by the position of the rolls for reversing thej feeding-operation.

2.- In a ribbon feeding deviee, the combination of a pair of ribbon rolls, pivotally mounted frames in which said'rolls are rotatably mounted whereby the rolls are-ca pable of movement about the frame-pivots,

' means forfeedingth'e ribbon from': one roll onto the other,

and means for reversing the .feedin operation upon subs tantial depletion 0 onejof the rolls In a ribbon feeding mechanism, the

combination of a pair of ribb .nrolls,"pivotally mounted frames in which said rolls are journaled, whereby each roll is capable of independent movement ina direction transverse to its a x is'fmeans for feeding the ribbon from one roll onto, the, ot'her, and means controlled 6 relative positions snag the ribbon feeding of the rolls for revs: operation- 4. In a ribbon reeding mechanism, the combination'of a pair of ribbon; rolls, pivotally mounted frames in which. said rolls are mounted, =plates upon which said rolls are adapted to rest, means for feeding the ribbon from one roll' onto the other, and means controlled bv the position of the axis done of said rolls relativelyito' its plate for reversing the feeding operation.

In a ribbon feeding mechanism, the

combination of a pair ofrlbbon rolls mounted so as to be capable of movement tran'sversely of the path of travel of the'ribbon, means for feeding the ribbon from one roll onto the other, means adapted to move with said ribbon rolls for reversing the feeding operation and stationary means for actuating said reversing means. i

6. In a ribbon feeding mechanism, the

combination of a pair of ribbon rolls, shafts therefor, means for feeding the ribbon from 'one roll onto the other, and means for reversin the feeding operation, comprising a mem er pivotally mounted on each ribbon roll shaft, aconnection between said mem-,

bers, and a stationary device ada ted 'to 'turn'said members on the ribbon'rol shafts.

7. In a ribbon feeding mechanism, the

combination of a movable frame, a pairof ribbon rolls mounted thereon, means for feeding the ribbon from one roll onto the other, comprising a ratchet-wheel mounted on a ribbon roll,'a pawl adapted tofactuate said wheel, means for operating said pawlv and means for reversing the feeding-operation, comprising amember pivotallyg mounted on the ribbon; roll shaft and. adapted-to raise said pawl outofengagement with said ratchet-wheela'nd astationa'ry device for operating saidpawl raising means,

'8. Inaribbon feeding mechanism," the combination of a pair of ribbon rolls, means for intermittently feeding the ribbon from one roll onto the-other, and means for movmg said. rolls transversely of their axes in a direction parallel with the direction of I travel of the ribbon 9. In. a ribbon' feedin'g mechanism, combination of a frame, a pair of ribbon" rolls, and means for pivotallvsupporting said *rolls on "said frame so that theyg. are.

capable of movement in a directionfparallel with and in' a direction transverse to the path of travel of the ribbon.

10. In a ribbon feeding mechanism, the combination'ofja pair of vribbon rolls, means for. supporting sa drolls, said means being *capable'of movementwith the'rollsin a di rection transverse to the path of movement of the= ribbon,ffand"means for moving said rolls simultaneously in a direction parallel t the ribbonand mechanism dependent upon the position ,of the rolls for. reversing the I'lbbOIl' feeding operations I Q 12; In a ribbon feeding mechanism, the

combination of a pair of ribbon rolls, means for moving the rolls with the ribbon thereon, bodily transversely oftheir axes, in a direction par'allelwith the path of travel of the ribbon,i.means for actuating said rolls to wind the-ribbon fromone roll ontothe other, andmeans for' reversingthe winding operation.

. 13.' In aribbon feeding mechanism,

combination of avpa-ir of ribbon "rolls, a pair of pivotally mounted frames inwhich said rolls are rotatably mounted, means forrotating said rolls to wind the ribbon from one roll; onto the otherjand means; for reg; clprocatlng said-rolls, bodily, in a direction transverse to the I'OllS.-- y

longitudinal axes of said 14. In a ribbon feeding' mechanism, the

combination of apai r of ribbon rolls, means for feeding the ribbon from one roll onto the other, means for moving said rolls and ribbon'in a direction transverse to the lon tudinal axes of said rolls, and means i dr reversing the ribbon feeding operation. v

15. aribbonxfeeding mechanism, the combination of a pair of ribbon rolls, means for feeding the ribbon from one -roll onto the other, means for reversing the feeding operation, all carried upon a' frame, means for actuatingsaid reversing mechanism, and means for reciprocating; said frame in the plane of travel of the ribbons i I 16. In a flribbonlfeedi'ng mechanism, the

combination of a frame, 'a plurality of 0's cillatorygsupporting"'arms carrying said frame, a 'p' 1r of ribbon rolls, means for feeding the.; ribbon"from one roll onto the other, and feed reversing mechanism, all

mounted on said frame, means for reciproeating-said frame longitudinally of the ribopera bon and stationary means adapted to ate said reversing mechanism.

17. In aribbon feedig mechanism, the combination of a ribbon, roll, a ratchet wheel secured to-said roll, a link pivotally mounted at one end on the ribbon roll shaft for,

ing the printingvertical plane,

and pivoted to a swingin member at its other end, a pawl carried y, said link and adapted to engage with the ratchet-wheel, and means for moving theribbon roll rela 'tively tothe pivoted end of the'link, where by a partial rotation is given to said roll by the pawl carried on the link,

i 18. In a ribbon feeding mechanism, the combination of a ribbon roll, a shaft therea ratchet-wheel carried thereby, a link pivoted to the roll shaft, a pawl carried by said link and adapted to engage'with said ratchet-wheel, and a cam loosely mounted on the ribbon roll shaft and adapted to be turned to a position to engage the pawl and withdraw it from operative engagement with the ratchet-wheel.

19. In a ribbon feedin mechanism, the combination of a pair of ribbon rolls mounted for movement indefpendently of H each other, a ribbon, means or feeding the ribbon'froni one roll onto the other, and means for moving the ribbon and rolls, bodily, dur operation in a direction I arallel with the path of travel of the ribon. i i

i In a ribbon feeding mechanism, the combination of a pair of ribbon rolls, shafts therefor, pawl and ratchet means connected with said rolls for feeding the ribbon. from one roll onto the other, and means for reversing the feeding operation by maintaining oneof the pawls out'of operative enwith its ratchet while permitting gagement the other'to cooperate therewith, comprising a plurality of cams mounted on the rib.-

bon-ro l shafts, a link connecting said cams,

means for yieldinglymaintaining said cams v v in one 1 of two positions, and a stationary abutment adapted to actuatesaid link to reverse the position of the cams.

21,111 a ribbon feeding mechanism, the combination of a pair of rlbbonrolls, means for feeding the ribbon from one roll onto the other and a reversing mechanism, all

'mounted to reciprocate bodily on the machine frame, and astationary abutment disposed in the path of reciprocation of the reversing mechanism and adapted to beengaged thereby, whereby to reverse the feed 111g operation. a

22; "In a ribbon feeding mechanism, the combination of a ribbon roll, ,a' pivotally mounted frame in which said roll is carried whereby the roll is capable of movement in a mechanism for rotating said roll, and means mounted upon the roll shaft for throwingou't of operation the-roll rotating mechanism,a1id means foryieldingly retaining said rotating mechanism in either its operativeor inoperative position.

.23.; In a ribbon feeding mechanism, the

combination of a main frame, a second. frame mounted to reciprocate longitudinally of the mainframe, a pair of ribbon rolls to the frame, from one roll mounted in said second frame so as to be capable of independent movement relatively means for feeding the ribbon onto the other, a stationary abutment on the main frame, and means carried upon the ribbon roll shafts adapted to be brought into engagement with said abutment during the reciprocation of the said second frame when one of the rolls is substantiallyexhausted, to reverse the 'feed- 10 ingoperation.

' JOSEPH s. DUNC N.) Witnesses d WM. 0. BELT, M. A; KIDDIE.

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