US2661686A

US2661686A - Duplicating machine

Info

Publication number: US2661686A
Application number: US89384A
Authority: US
Inventors: Carl A Levin; Robert W Quirk
Original assignee: Ditto Inc
Current assignee: Ditto Inc
Priority date: 1949-04-25
Filing date: 1949-04-25
Publication date: 1953-12-08
Anticipated expiration: 1970-12-08

Description

Dec. 8, 1953 c. A. LEvlN ET AL DUPLICATING MACHINE 6- Sheets-Sheetl l Filed April 25, 1949 C. A. LEVIN ETAL DUPLICATING MACHINE e sheets-sheet 2 Filed April 25, 1949 AKT-"110111110 6 Sheets-Sheet 3 c. A. LEVIN E-rAL DUPLICATING MACHINE 5N M- l I I I 5 M NN MN. u I ww n H Y mm N Q WM A M I III II h ,A IW III I I I mm Hl \HI.|I||II|IIIM4|II\\HI @IN \\I WW m ,SI I I, I@ Nb.

Dec. 8, 1953 Filed April 25. 1949 Dec. 8, 1953 c. A. LEvlN ETAL DUPLICATING MACHINE 6 Sheets-Sheet 4 Filed Ap'ril 25, 1949 f77 Zfezz fors Lklll Dec. 8, 1953 5 c. A. I EvlN yET AL DUPLICATING MACHINE 6 sheets-sheet 5 Filed April 25, 1949 'lllllllllll'lllllllla X/ s E J l/ mm. V 7 Nk NNWM MM NN wk w i, NY

Dec. 8, 1953 C, A, LEWN ETAL 2,661,686

DUPLICATING MACHINE f 's sheets-sheet e Filed April 25, 1949 .rneens enepeindiri p Patented Dec. 8, 1953 C hieagg, 111..;slsi'gnors to Ditto, Incorporated, Chicago,r Kl., a corporation of West viiingdnsefrinfe and ils .ein imprevenient .over .die

.Ii .is en inrpe.rieni...pnlrpe's'e di eiirjiriverriipn te inivide .new dnd. impreved..driviperneens fer lfeediiie .pprndrs-.rir feeding.- sheets .ene .ein tiine from feed tray to. ehge,ge with the rriaster .ihedrir'rr'r ifdnpiieeiipe. indemne.. di. .ine fenereeiersei ferihinine .ebeve rererred inapplieeiien.. .id ,feedinfg ep'pdrdidseernprisinr e. indr'yjfeedine reiier. ....r..irdnsf.erring sheeis. freni .risiede'ene .er eiirrre ieeernpiped rnpistening epd lieedingreilers. irenrendbv Whieir seid. sheets. are

.dien-eidveneedini.eneeeeinenr with infe rndsie'r vvsds., 'seid feediiie eppeepereie ...sneei .edveneing rnnerv. ier-ding .relier .sind the other bei'r'i the combined rnoistening: and feedi'ifg rollers. A .u

....Ourinveniien preyides. e .driving meenenisni ,epilre.dr.1.1.r.n.. Ire-einer. rsipsembedies ivve .ier i'hejieedifne nreens ihliiis ei. ejs'mple efind fenedp eensirne 1en.--.b.ui .v /hren. is r bie 'dnd eneenve. .id *cerise-.seid feeding. Ineens drs@ iepiek 1ip 'd 'sneee'irern .dieter .ef e. .sieelrerid ieieedii ipierne sneer-ine vpeirei .feeding dndnreiseenipg werden@ reliefs, .se .ro feed :me freeride positiorr Between. a1-1, i '1r1pr 'essiqr 1` roller hdd* the drin n vvhieir .die .riester sneer .ifs ieeeied.- er siren' 'raie ineiinesneetis irevelinediinesdpde speed .es .ine sprieee-speed-ef irre. drdnrvvnen ii endes vviinspid .drinn -end .irnpressien reiier. seins idpreveni dnv pudding. eiinesheei es ii vreines iniefeneereirreni vvin .inenrdjsier-- .It is diuriherpnrppse of eur .inven'tijenft .prd-

rolle's dhthe'h to rotte Said feeding and.

.vided driving .menirs....ef. ine...n.bpv meniiened ensreeter indi .is positive in operation. end .vvpien .ine driving.. ednneeiien. beivieen...ihe. eenrieined irieisienine. end feeding. rpliers epd .ineprinry feedfipefreiler is entirely gear drivenexeepi ...fer @nervi/dy elniehmeens ...provided ier.A obtain-.-

pgwrotatio `of the feed rollers in the proper direction.

.i vide. d driving .Ineens idr @primary srreetreedine relier. end ene oi the Ipe..iredfeedinseind nroisten.-

.ine rellers niilizedin. e. ddpliediine..meehineef ine appie .mentioned renderer..- seid. driving [eemprisirre .d-. 1.everaetuetedpesiiively in Opposite directions by mednspfeeam. whiehrcam .iseperatedpy .reieiipppfrne drumparryinsrhe master sheet, said lever being provided with a .seetpr .eenrperiiener errrved.A .reek periipninnr drives a train 0f..seers. epereiinetp roietememhers forming the driven members v oi one-way driving. means .in .the.-.form 0f .Qverrnnnine e1uie1res...conneeied.. respectively, .with .the pri,- nrnry feed roller ,thatrernovesihesheet .frdrn the steek., and with. enepf.. the. p -air. .0f..f eedin.e and .-rneisienine.re1lers,.thet feeds the. sheet .ie.;.t.h.e impression. roller. .thepverrunnine eluteh. means pperdtns. 'ed feed the .sheet frpmthesieek. when ihelever isrnevineinone direction andthe. driven .roller .of the paired. f .eed .rollers beine. vctudied when the lever mOi/.sein Ythe. Opposite.. direction.. Other o bjectsyahdedvehtages of our invention will appear. ds the: description ef... the. drawings preeeeds. .Wedesire .behave it understood... however. .thntvve ddnet intend .ip lirnit edrselves i0 the particular details shown .or described, except as deiihedihthedaims. lnihedrawings.; Fie. .1, s. .veri.ied1. seeiipndl view ,taken lens.

iudindliyihreden iperndehine forming .the se. .6

thel line .-.-3-.d'f 'Fin' 2, nefrnybreleen dw Fils. '4 is Vre'rtieal .tra nsvers'e sectior. thelihe -'li of Fig. rpartly Broken away... AFigi. `5 is fragmentary plan section taken YOn the line 5-"5 .o fl'ig. 2. Fig. 6 is fragmentary 'pian View ofthe'feed tra'y arid portions of va. feed r'ller and thesolvent reservein i.

vFig. ,7 isa fragmentary vertical sectional 4vview, ieken 0n. the .line 1:1. .of Fie- 6- i Fidi 3. is .d View periivin .seeiien and partlyin elevation ofv the ohe-Wayeiutch mechanism, on an enlargeds'cal'e; v showing the samejmouted on a. feed roller shaft, the `substKajritirlly on the line 8 8 o f Fig..9 look; thedirection ofthe rrwsga'nd v Fig'. 9is a.- transv'le'r'sesectional view through one-Way` clutchvimechanism and rollershaft, taken substantially on the lie 9-9 of Fig. B.'v

As will be v-poiimd out hereinafter, the' euphcating machineir'rcludes a. drum l5, and-pressure.ro11er.2.`l.1 which. cooperates therewith. Y Dis'- vposed in front .fofthedrumgand .pressure roller, Which is to ..the 1eft, assh'own in Fig.` 1, aridi-in substantial alignment with the the bite thereof, is a vand the bearings 22 and 23. lwith the-gear 4 andis fixed on the shaft I3, an

pair of combined feeding and moistening rollers 1S and 25|, respectively. Disposed in front of the latter rollers, is a feed tray M which is` adapted to support a stack of sheets IG I, as shown in Figs. l6 and 7. A primary feeding roller Idil is adapted to rest on the feed tray Mt or on the stack of sheets supported thereby, and is disposed in substantial alignment `with the bite of the feeding and moistening rollers 'l5 and Ze'l, and with the bite of the drum l5 and pressure roller 211. The alignment of the parts specified is only substantial for the reason that the position of the primary feeding roller Itl undergoes considerable variation, depending upon the height of the stack IM of sheets on which the y primary feeding roller rests.'

Means, comprising a supply tank ft2, a pump y 201 (shown in Fig. 2), suitable conduits, a perfo- II, which are vconnected by means of a plurality of transverse frame members I2. A shaft I3 is journaled in suitable bearings Iii mounted in the side plates Ii! and II. The drum I5 is mounted on the shaft I3 to rotate therewith, hub portions I6 being provided from Ywhich the spokes Il extendto the rim portion of the drum, said hub portions being fixed in position on the shaft i3.

The shaft I3 may be driven in any suitable manner, being shown as being rotated by means of the crank I8, which is provided with a suitable handle i8 and which is xed to a stub shaft 2B inv any suitable manner so as to rotate said shaft by means of said crank. A bracket 2| is provided on the side plate le and a bearing 22 for the shaft is provided in said bracket, aS-Well as a bearing 23 in an opening in the side plate I0. A gear 2li is fixed on the shaft 22 between the two bearing members 22 and it, suitable antifriction washers 25 and 26 being provided between the gear 26 A gear 27 meshes anti-friction washer 28 being provided between the gear 2, which rotates with the shaft I3, and the bearing member I. The drum I5 is thus rotated by means of the crank I8. The direction of rotation of the drum is counter-clockwise as viewed in Fig. 1, and clockwise as viewed in Fig. 13, arrows being provided on Figs. 1 and 13 to indicate the direction of rotation of said drum.

The side plates it and II`have sheet metal cover plates 29 and SII detachably mounted thereon providing housings for the driving means for the drum and other moving parts, as will be describedl below. The `shaft i3 hasa Yreduced extension 3l extending into the space between the side'plate Il and thercover plate Y3d. A collar 32 is fixed on said reduced extension 3l by means of-a set screw 3,3, said `collar having 'an enlargement 34 thereon in which said set screw 33 is screw-threadedly mounted. Said enlargement 341 also has a pair of screw-threaded headed fastening elements 35, engaging in threaded openings therein for securing a cam 316 in fixed. position on the collar 32, an anti-friction washer 3l being 4 mounted between the collar 32 and the bearing Iii.

The cam 35 has a cam groove formed therein between the peripheral fiange 38 thereon and the inner flange 39 providing an offset wall portion 40 that forms the bottom of the cam groove. The cam groove has a high portion III and a low portion 42 connected by means of the relatively sharply curved portions 43 and de. The grooved cam St rotates with the shaft I3 and thus rotates in a clockwise direction as viewed in Fig, 2.

' A follower in the form of a roller 55, of a diameter that is equal to the width of the cam groove be- Y tween the flanges 33 and 39, operates in said cam groove, (see FigsZ and 5). Said follower de will be `moved to the right as viewed in Fig. 2 as the cam rotates from the position shown in Fig. 2.

' The. sharply curved portion e4 of the groove is connected with the low portion 42 by means of f arising portion it and as the follower d5 travels `along this rising portion $5 of the cam groove it 'will be moved to the right rather rapidly. It will continue to move to the right as it rounds the sharp turn 22 and will reach the limit of its movement to the right when the junction of the sharply curved portion M and the high portion I at about the point indicated by the numeral 6i is reached. The follower 45 will then remain in its extreme right position for the entire time that the follower l5 is traveling between the vflanges E8 and 32 in the high portion III. It will Vbegin its movement to the left as it rounds the sharply curved portion it of said groove and will move rapidly toward the left back to the position shown in Fig. 2 as the follower travels along the descending portion'd of said cam. It will be noted that the movement of the follower 45 in both directions will be positive and that it will be positively held in its furthest position to the right from the time that it is engaged by the high portion at approximately the point l until it leaves the high portion at approximately the point 69.

A pivot pin 5d, which has a collar 5I thereon, has the shank portion 52 thereof mounted in an opening in the side plate Ii, being xed in position in said side plate between the flange 53 land the collar' el. `A bearing member 5d is -mounted on the pivot pin 59 to pivotally mount the sleeve 5 fixed in an opening in the lever 55 "onthe pivot pin fit. Said lever 5S is fixed to the sleeve 55 by clamping said lever 52 between a shoulder provided on the sleeve 5in' and the headed over portion 5l on said sleeve.

The lever 56 has a radially extending arm 58 and a transversely extending head portion 59. The radially extending arm 58 has a slight lateral enlargement 2li in which the reduced portion Si of the pivot member 62 for the follower itis mounted, said reduced portion being headed over at S3 to fix the pivot pin G2 in the lever 55. lThe lever 5t will accordingly be oscillated to the right when the followerl 45 travels to the right as viewed in Fig. 2, due to the rotation of the 'cam member 35, and-to the left, as viewed in vFig. 2, when the follower 45 is moved to the left due to rotation of said cam member. As a revsult the lever 5t will-be oscillated in a counterclockwise direction, as viewed in Fig. 2, as the lfollower travels in the groove toward the high portion il thereof and will be moved in a clockwise direction about its pivot, as viewed in Fig. 2, as it travels from the high portion of the cam to the low portion thereof.

The movements of the lever 5B will thus be from fs the meinen shown liii Fig. g rather rapidly td- Yvvari'i the ght -`of that position through ay 'prevdetermined are, then v'the lever will remain in Aits "ffuini'e'stv 'petition te the 'right through a iittie -`over half o f a revolution of theshiaft I3 'that has the reducedpditidn s l, then again rather rapidly through a clockwise oscillation ba'ok `to the position shown Fig. 2. 'rhje parte win-only remain in'"o'nen't'aril'y in thrpositibn shown yin 2 b'e- 'eaus'e the movement fwthekfoliower i5 toward the 'right as viev/e'd in 2 vvill commence as 'soon as the idw point of ljtiiejegini has been reached. The head 'portion Y5S "of the pivoted. lever 5t has e. fseeiei shaped toothed portidnta providing 'a curved rack 'on said lever 'and also has the 'cam "surface '65 thereon, Ait'fhioh gradually rises toward`v the lft as vivved inl 2., The 'jeampdrjtioii t5 is utiiized for operating theiiqiiid "feeding pump in a manner Isnb'stanti'ally Vsirr'rila'r "to that pointed out in the aforese. d eopending application. The toothed portion :'64 b'peteS the sl'fee't feeding mechanism through a train `of vgears 'lofompris'ing a gear |56 meshing with the teeth 64. The gear 66 is provided on 'a Ione-WayY "or overrunning clutch dev-ice B'l, which has a stub Ashaft '6'8 that is mounted in e'. han bearing es 'that ie provided in an opening iii the eide piede ifi. The IStub sha-ft 68 'X'tns into bore 70 in the end of afffeeii'ing and moisteiiing roller shaft 11 being fixed in said bore to rotate with the shaft/'ii by snit-able means, Such as the set screws T2,

y"Jire Aina'mier Which the feeding land moi-'steniii ro11er 'I9 -is mounted on the AShaft H vso as t0 rotate therewith iS 'set L'forth below. The feeding land'm'o'stehing rol-lei` s'haft Il (se Figs. 4 and 5)-,y -is 'provided with a r'eduked end portion 13, Whieh 'is inointed in al'al-l beia'riri V18 in the ySide yplate l"i 0, and a pair 'of Collars l5 and T6 l-X'e'd thereon, which are also hired in redued end portions I-'I'd i8 'of tbl'a :Col-1er 19 Whieh :c'nprises th Inostfhig an'd Afeeding roller 19. The `tolla'rs 15 and T6 a, preferably, p're'ss. n the shaft and into ythe Lieduoed rendy portions n `dhd T8 of *Said tubular roller 19.I Said tubular roller is thus-fixed iin-th shaft 1| toeio'taltthivth. The roller 19 must Ioifate in a'c'o-lt'-Clckwise direction as vievved in Fig. 1 in the operation of the machine, 'and aocordin-gly 'said roller must rotate with the gear 66 when lit Yrotates a yk'zllcok- 'wise :direction as viewed in Fig. 2. Aceordingiy the Aone-way clutch mechanism 61 is so arranged -as to drive the shaft 'H when the gear '6'6 mounted Vthereon rotates' in a clockwise direction 'and to Yrelease so as to have the shaft V'1| remain stationary when the gear' '66 rotates 'in a counterclockwise 'direction Accordingly l the vfeeding; movement of the rolier' takes place when the toothed sector 6'4 is swung' toward the right., or

counter-clockwise about the pivot 50, from the position shown in Fig. 2.

The driving means for the p'rimary feeding roller |00, and the manner in which it is'mo'unted 's0 that it may adjust itself t0 th'e height of the 'stack 14|-, v'vill now be desoribd in detail. Ah idler iiiiismountd to rotate abutastub shaft 8| te'd 'in the side plate 4| l, a bearing mmb'r 82 being provided for said idler 80 'on said stub shaft 8|, and 'said b'earing7 B2 also having 'a plate 83 Divotaily mounted thereon; Whioh plate" 83 serves as a pivot lever for a feed roller mounting to be desribed bel'ow. The idler l8|.) has a pair ci hear `settore 84 and a5 formed thereon,l the .'toothed portion 84 meshing-vviththe teeth ofthe gear 66 4and the toothed :portion 85 meshing 'with ytheir pivotal axes and thi A'pitite ve?. and having e. spacing `'Steeve es Aprovided here-dii,n a, 'ed-neme eedigine peine 4piet-idee jen 'theeheft -'-1' idr the Vidierv ist. sai/didier fot meshwith a J'gear afs that is iixed on e. one-way for shaft ti proj'ect'iiigy therefrom 'when the gear te gear 'et when the yhait tu hotjbeing f'driven through its one-"Way olutoh Vfne'cha'inism 67;l

' barn'gv'sleeve 92 is iiied in VAan opening in vthe diete-like member 7se iieer the extrem-ity thereof opposite that pivoted on the pivot -nern- -b'er I87|.

Said -sheftceupiihg en is pinned to the ft eje the fsh'a'ft in theefide {piats im and il 'and the `shaft '95 and roher 'mo have a iinitedareuate movement about of the slots |02.

UshoWifi. in 'detail inFfgsiifahd 9. As' both of the one-way clutch'dvices .areof the saine general 'eon'struct'ion the detailocorstruction of. only v'cieth'ereof is shown; The one-wayfclutch member shown in Figs. 8 and!) isshown a`s being the clutch 61 carrying the gear v551i: i The body portion of the olxtch 6i is rotatably mounted 'on 'the stub shaft-68 and said shaft 68 has an annular vgroove 1|D`3therein, in whichtlie retaining ring |04 Yis mounted; a 'spring "|05 being: 'mounted between the 'face of the gearpo'rti'on '66of the clitoh'rriem` bei" G1 'and the retaining` ring |04. The stub shaft '0| is similarly provided With a groove in which "a retaining ring l 011 is mounted and between which Vand the face ofthe 'gear portion 89 of Said Aclutifi a spring |05 Vis provided.

Referring now to Figs.- 8 and 9',V the vbody por ti'o'n of the clutch member 61 is provided with `an annular laterally extending 'ange `m6 providing Aanniilar shoulder |01 surroundini, a reoss'in 'one face of said bodyp'rtiori; Said recess has Va 'hotto'm Viii/all 108,-fror'n which the annular rib |09 @projects 'and a centralhubilike portion H0.

vThe driven member .|.'l I. of .theu clutch is'mounted in xed position on the shaft 68 by means of a transversely extending slotted pin I I2, which extends through a suitable opening in the shaft 68, and is mounted in diametrically opposed recesses |3 in said driven member I l I. The driven member is substantially disk-like in character, being mounted on the shaft 68 lso as to extend slightly into the recess bounded by the shoulder |01, and has a transverse opening I I4 therein, in which a driving pin I|5 is mounted in fixed position, said pin ||5 projecting into the recess, as will be clear from Fig. 8.

Surrounding the shaft 68 and mounted between the member III and the body portion of the clutch 61 at the hub portion ||0 thereof is a spring H6, which is substantially of a circular character except for the ends ||1 and ||8 projecting radially from the circular body portion thereof. Also mounted between the main body vportion of the clutch 61 and the driven member I I I and engaging the inner face |I9 of the driven member III the annular rib |09 and the hub portion I I0 are a pair of clutch members |20 and I2 I. The clutch member |2| has a slot |22 therein that is open at its outer end and slidably receives the pin II5. Said clutch member has a concave inner face |23, against which the curved body portion of the spring ||6 seats, and has an outer curved surface |24, which extends from the slot |22 to the curved end |25 of said clutch member |2|. rI`he curved outer surface |24 of the member |2I is curved onv a long radius of curvature from the slot |22 to a portion of much sharper curvature |26, which engages the annular shoulder |01 provided on the main body portion of the clutch, said more sharply curved portion |26 extending to the end portion |25, which is of a curvature of still smaller radius, and the curved portion seats in a correspondingly curved recess or socket |21 in the other clutch member |20. The clutch member |2| also has a recess |28 comprising a socket portion adapted to receive the curved end portion |29 of the clutch member |20.

The clutch members 61 and 90 both operate to drive the shafts that these connect with the

gears

66 and 89 when said gears 6B and 89 are rotating in a clockwise direction, as viewed in Fig. 2. In other words, the clutch member 51 operates to rotate the shaft in a counter-clockwise direction when the body portion of the clutch mem.

ber 61 is rotating in such a counter-clockwise direotion, as viewed in Fig. 9. The spring member ||6 normally operates to hold the portions |3| and |33 of the clutch member |20 in engagementwith the shoulder |01, and the curved portion |26 of the clutch member |2| in engagement with said shoulder. Upon rotation of the driving member of the clutch in a counter-clockwise direction, as viewed in Fig. 9, the tendency is for the engaging portion of the member |2| to move in such counter-clockwise direction, which will cause the end of the member |2| that has the slot |22 therein to move outwardly relative to the pin II5. This causes the curved outer face of the clutch member |2| to be tightly clamped or pressed against the shoulder |01 as the rocker or toe portion |25 of said clutch member |2| tends to rotate in a clockwise direction in the socket |21, thus locking the member |2| to the body portion of the clutch 61 and driving the pin I i5 and thus the shaft 60 in a counter-clockwise direction, as viewed in Fig. 9,

However, when the gear 66 is rotated in the opposite direction the m-ain body portion of the clutch member 61 will rotate in a clockwise direction, as Viewed in Fig. 9. When such rotation takes place, the tendency is for the end of the clutch member having the slot |22 therein to move inwardly relative to the pin I|5 as the clutch member I2I is moved slightly in a clockwise direction, as viewed in Fig. 9. This will cause the spring [I6 to be tensioned and the ends ||1 and H8 thereof to be moved toward each other. Only a very slight amount of such movement is necessary, for any movement of the ends I1 and H3 toward each other will cause rotation of the end 25 of the clutch member |2| in the socket |21 in a counter-clockwise direction, disengaging the curved contact portion |26 of the clutch 1 member I2! from the annular shoulder |01 and causing the curved end portion |26 of the clutch member i2@ to move toward the socket |28. Thus the clutch member I2I is released by a very slight movement of the end wall |36 thereof toward the end wall |31 of the member |20 and as a result the clutch will slip as long as rotation of the lannular flange |06 is in a clockwise direction, as viewed in Fig. 9. However, the spring I6 is yieldingly urging the members |20 and I2I apart and thus the contacting portions I3I, |33 and |26 thereof toward the shoulder 01. Accordingly, as soon as rotation in a counter-clockwise direction of the flange |06, as viewed in Fig. 9, occurs, the clutch will again grip, `as described above, to rotate theshaft 58 with the gear 66.

The roller |00 serves as means for removing the sheets of paper to be fed into the machine from a stack one at a time, rotating in a counter-clockwise direction, `as viewed in Fig. 1, to accomplish this. The sheets to be fed are mounted in a feed tray that has a body portion |40 providing a fiat surface upon which the stack of sheets to be fed rests, one of said sheets being shown at |4|. The

feed tray, as shown in Figs. 6 and 1, 'also has depending side flanges It and end anges |43, and may be of a reversible character, similar to that described in the application of Robert Warren Quirk, above referred to.

In operation, assuming that the master sheet has been suitably clamped on the drum I5, and that a stack of copy sheets I 6I, are disposed on the feed tray |40, the duplicating operation is effected by rotation of the crank I8. When such rotation takes place, the cam 35 is rotated in a clockwise direction, as viewed in Fig. 2, and the arm 55 is swung to the right, as viewed in Fig. 2. This causes a clockwise rotation of the gear 66 and a rotation of the combination feed and sheet moistening roller 19. At the same time the cam 65 operates the pump 201 to feed solvent liquid through. suitable conduits to be discharged from the feed tube4 Ilil onto-theroller 19- andl thel wiper pad |56 'atthe trough-like grooveprovided between said roller and wiper pad. After the cam has rotated suinciently that the follower engages the-:portion 5'! thereof, the movement to-the; right vof the arm 56 haits Iand is not resumed until the portion :i9 of the cam reaches the rollerllS- When this takes place, then the arm 5S rotates again toward the left to the position shown in Fig', 2 and as this rotation takes place, the gear 66 is rotated counterclockwise. This causes a clock'- wise rotation of the gear 89 and rotation of the primary feeding roller to'V feed a` sheet from the stack into the bite of the moistening and feeding rollers 719 Iand 25E, the sheet being guided into proper position relative to said rollers by the guide portions |53 andA H89 of the guide members thathave the inclined portions L52 and1 |62. The rotation of the moistening and feeding rollers 25| and 'E9/does not take-place, however, until the primary feeding roller |69 has finished its rotation and the cam moves beyond the position shown` in Fig. 2 in its clockwise rotation: Then another movement in a clockwise direction ofthe gear 66 takes place` in the manner a-boveV described, the sheet is moistened; on the surface thereof engaging the roller 19 and is fedi into engagement with the drum Iii-'and into positionl between the impression roller' 2H and the master on the drum I5. The rate of rotation of the roller 19 is suchthat the sheetwill; have the same lineal speed as the surface of the drum l; The oscillation of the armk 55 under the influence ofthe cam 3S willi be. repeated inthe abovereferred tomanner as the drum is rotated to: feed successive sheets into engagement with the master on the drum.

What we claim is:

l. In a duplicating machine, a drum, means for rotating said drum, a sheet feeding and moistening roller, a feed tray adapted to support a stack of sheets, a roller for removing a sheet from said stack and feeding said sheet to said feeding and moistening roller, and means for intermittently and successively rotating said rollers upon rotation of said drum, comprising a member moved back and forth between two alternative positions by rotation of said drum, a pair of rotatable members, a gear drive between said first member and said rotatable members simultaneously rotating said rotatable mem-bers in opposite directions, said gear drive including a gear train connecting said rotatable members and means connecting said rotatable members with said rollers to rotate said rollers with said rotatable members only in a sheet feeding direction.

2. In a duplicating machine, a drum, means for rotating said drum, a sheet feeding and moistening roller, a feed tray adapted to support a stack of sheets, a roller mounted for movement toward and away from said feed tray for removing a sheet from said stack and feeding said sheet to said feeding and moistening roller, and means for intermittently and successively rotating said rollers upon rotation of said drum, comprising a member moved back and forth between two alternative positions by rotation of said drum, a pair of rotatable members, a gear drive between said first member and said rotatable members simultaneously rotating said rotatable members in opposite directions and each alternately in opposite directions, and means connecting said rotatable members with said rollers to rotate said 10 rel-1ers with said rta-table members only in a sheet feeding direction.

3'. In a duplicating machine, a drum, means'for rotating said drum, a sheet feeding and moistening roller, a feed tray adaptedto support a stack of sheets, ai rol-lerl mounted for movement toward and5 away from'said feed tra-y fo'r removinga sheetfrom said stack and feeding said sheet to said feedingj and moistening roller, and; means for intermittently and. successively rotating said rollersupjon' rotation of' said drum, comprising a pivoted@ memberpositively Vmovedl back and forthbet'ween two alternative positions by rota-tionof said drum-a pair of rotatable members, a geardrive between said pivoted memberv and said rotatable members simultaneouslyV rotating s'aid-r rotatable members in opposite directions, said gear drive including a gear trainconn'ecting said rotatable members and movable with said roller towardj and away7 from the surface of said feedl trayv and means vconnecting said rotatable members with said Vrollers to rotate said rollers with said rotatablemembers onlyin av sheet feed'- ing direction;` y

4j. In aduplicatingmachine, a drum, means for rotating said drum, a sheet feeding and moisten-` ing roller, a feeditray adapted to support a stack of' sheets, aroller for removing a sheet from said' stackand feedingsaid sheet to saidl feeding and moistening roller, and'` meansforr intermittently `a'ndfsuccessively rotating' said" rollers upon rotation of saidfdrum',v comprising amember oscillated between two alternative positions by rotation of 'said drum, a'pair of rotatablegears,

v atoothed port-ion` orif'said member meshing with one of' saidf gea-rs,lv La positive driving' connection between said gears to simultaneously rotate the same in opposite directions, and means connecting said gears with said rollers to rotate said rollers with said gears only in a sheet feeding direction.

5. In a duplicating machine, a drum, means for rotating said drum, a sheet feeding and moistening roller, a feed tray adapted to support a stack of sheets, a roller for removing a sheet `from said stack and feeding said sheet to said feeding and moistening roller, and means for intermittently and successively rotating said rollers upon rotation of said drum, comprising a member mounted for swinging movement, a cam rotating with said drum, a follower engaging said cam to positively swing said member back and forth between two alternative positions, a pair of rotatable gears, a toothed portion on said member meshing with one of said gears, a positive driving connection between said gears to simultaneously rotate the same in opposite directions, and means connecting said gears with said rollers to rotate said rollers with said gears only in a sheet feeding direction.

6. In a duplicating machine, a drum, means for rotating said drum, a sheet feeding and moistening roller, a feed tray adapted to sup` port a stack of sheets, a roller for removing a sheet from said stack and feeding said sheet tosaid feeding and moistening roller, a pair of arms -mounting said roller for swinging movement toward and away Vfrom said feed tray, and means for intermittently and successively rotating said rollers upon rotation of said drum, comprising a member oscillated between two alternative positions by rotation of said drum, a pair of rotatable gears, a toothed portion on said member meshing with one of said. gears, the other of said gears being mounted on one of said arms,

1 1 a train of gears mounted on said arm between said pair of gears to rotate the same in opposite directions, and means connecting said gears with said rollers to rotate said rollers with said gears only in a sheet feeding direction.

7. In a duplicating machine having a drum and pressure roll disposed in engagement with each other and forming a bite, and a feed tray disposed in substantial alignment with said bite and adapted `to support stacked sheets, the combination of two spaced sheet feeding rollers disposed in substantial alignment with said bite, one of said rollers comprising a primary feeding roller and being disposed above said feed tray, and the other of said rollers being a combined feeding and moistening roller and being disposed between said primary feeding roller and said bite, and means for intermittently and successively rotating said rollers, upon rotation of said drum, only in a sheet feeding direction, so that a sheet may be advanced by said primary feeding roller from said stack into engagement with said combined moistening and feeding roller while the latter is stationary, and so that said sheet will be subsequently advanced by said combined feeding and moistening roller in timed relationship with the rotation of said drum into said bite, said roller rotating means comprising an oscillating member pivotally mounted on a side frame of said machine, means actuated by the rotation of said drum for oscillating said oscillating member, a pair of rotatable members, one for each of said rollers, and each being coaxially mounted with respect to said rollers, a gear sector carried by said oscillating member, and a gear train extending from said rack and including gears afxed to each of said rotatable members, said gear trains including an even number of gear elements connecting said rotatable members so that said rotatable members will be rotated thereby simultaneously in opposite directions, the direction of rotation of said gear train being reversed as said oscillating member oscillates, and overrunning clutch means interposed between said rotatable members and said rollers to cause said rollers to be driven by said rotatable members only in a sheet feeding direction, whereby said primary feeding roller will be positively driven only when said gear train is rotating in one direction and said combined feeding and moistening roller will be positively driven only when said gear train is rotating in the reverse direction.

CARL A. LEVIN. ROBERT W. QUIRK.

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