US1208084A - Feeding mechanism. - Google Patents

Description

Patented Me. 12

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H. BOSCH. FEEDING mE'cHANlsn/l. APPLICATION FILED OCT. 3l. 1914- lllll w wv Awa@ wm t www I n lll M I -211-- xwnxml .1\

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H. BOSCH. FEEDING MECHANISM.

APPLICATION min oc.3|.1914.

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FEEDING MECHANISWI.

APPLICATION FILED ocT. 31, 1914.

Patented Dec. 12, 1916.

5 SHEE-TS-SHEET 5.

HENRY BOSCH, OF CHICAGO, ILLINOIS, ASSIGNOB, TO'I-IENRY BOSCH COMPANY, CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

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Specification of Letters Patent. Pwbmmiigdl Iba., I2, IIIIL.

Application led October 31, 1914.. Serial No. 869,566.

To all whom it may concern Be it known that I, HENRY BoscH, ya citi-- zen of the United States, residing at 525 Wabash avenue, Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Feeding Mechanism, of which the following is a specification. y

My invention relates more particularly to mechanisms for feeding superposed sheets of paper to cutting-mechanism for severing the sheets into strips of a predetermined length.

I have devised my improvement for use more particularly in a machine of the general character above set forth, for use in the manufacture of wall paper sample-books. It is common practice in the manufacture of such sample-books to hang the various rolls of paper from which the samples are to be made, on racks, with the free ends of the paper lying in superposed condition in a chute, with the variousy designs of the paper arranged in the order desired in the finished sample-book, the superposed sheets extending into a position to be operated on by feed mechanism operating by an intermittent action to advance the superposed sheets by a similar movement, to mechanism which cuts the sheets into sections of the desired length. The severed sheets are then stitched, or otherwise secured together, without disturbing the arrangement of the designs, and then trimmed.

Feed mechanisms suitable for the operation above stated, as hitherto constructed, have presented the primary objections of disarranging the ends of the sheets during the operation 0f clamping the sheet-s to the feed device for advancing them to the cutting-mechanism and affording insufficient clearance of the clamping element in the return movement of the carriage; and furthermore, have been comparatively complicated and massive and readily susceptible to impairment.

My primary object is to provide a novel, simple, and comparatively inexpensive construction of feeding mechanism which will thereof, and thus preserve the desired relat1on of one sheet to the other, which is very desirable, especially in the making of sample-books as it greatly reduces waste in trimming. i

.Referring to the accompanying drawings, F igure 1 is a view in side elevation of feedlng mechanism constructed in accordance with my invention, the mechanism --being shown as one of the elements in apparatus for the manufacture of wall paper samplebooks, an end of the trough through which the superposed sheets pass to the feed mechanism, and the adjacent end of the table of the cutting mechanism, being represented. Fig. 2 is a plan view `section at-the line 2 on Fig. 1 of the construction illustrated in Fig. 1. Fig. 3 is a section taken at the line 3 .on Fig. 2, and viewed in the direction of the arrow, these views showing the feed mechanism at the end of its stroke toward thepa'per supply to be drawn from, preliminary to its operation for clamping and advancing thesheets. Fig. 4 is a broken view similar to Fig. 3, showing an intermediate position of the sheet-feeding means preparatory to the clamping of the paper. Fig. 5 is a similar view showing the position of the parts of the feed mechanism after the sheetclamping mechanism has moved to a position to clamp the sheets, and has been advanced .throughout a portion of its path of movement during the feeding of the sheets. Fig. G is a section taken at the line 6 on Fig. 1, and viewed in-the direction of thearrow. Fig. 7 is a view in elevation, partly sectional, of one of the similar adjusting devices for adjusting the movable one of vsaid sheetclamping members relative to its coperating stationary member. Fig. 8 is an enlarged section taken at the line 8 on Fig. 3, and viewed in the direction of the arrow. Fig. 9 is a section taken at the line 9 on Fig. 8, and viewed in the direction of the arrow. Fig. 10 is a section taken at the line 10 on Fig. 6, and viewed in the direction of the arrow; and FigQll, a section taken at the line 11 on Fig. 10, and viewed in the direction of the arrow.

The supporting frame of my improved feed mechanism comprises. end members 12 connected together by lower rods 13, a pair of horizontally disposed rods 14, and struts 15, the tops'of the end members 12 being connected together by parallel horizontally disposed bars V16 which form supports .for the passage through the feed mechanism, of the superposed sheets ofpaper to be fed and lyingwithin the chute' member hereinbefore referred to and represented at 17. The bars 14 form guides fora longitudinally reciprocable carriage 18 formed of a hollow frame 19 having side members 20 formed with split sleeve-sections 21 at which the carriage engages the bars 14, a lower crossbar 22,` and an u per cross-bar 23, the latter as indicated at 34,

lthe ends of a shaft of a length grea er than the width of the sheets of paper to be fed by the mechanism, the upper surface of the cross-bar 23 being grooved transversely, as indicated at 24, to receive the bars 16 which are preferably sprung upwardly as represented in Fig. 6 to normally extend at their lower sides a slight distance above the bottoms of the grooves 24 and at their upper sides above the upper surface of the bar 23 for a purpose hereinafter explained.

Fixedon the ends of the crow-bar 23 and rising from the latter are upright bars 25 containing slots 2'6 opening through the upper ends of these bars, the plane of these slots being .at substantially right-angles to the bar 23. Conned in the slots 26 to be vertically movable therein, is a presser-head 27 in the form of a plate extendingat its ends into the slots 26, with the intermediate portion of its lower edge widened, as indicated lat 28. The head 27 at its upper end carries spaced bearings 29 in which a shaft 30 having collars 31 .xed thereon by setscrews 32is journaled. The ends of the shaft 30 are connected with the upperends of rods 33 which are pivotally connected .with cranks 35 iixed on 36 journaled in bearings 37 provided on the side-bars 25 of the frame 18, whereby the presser-head 27 is raised or lowered when the shaft 36 is rocked depending on' the direction of its movement. The upper ends of the rods 33, which are screw-threaded, as represented at 38, pass through openings 39 in the ends of the shaft 30 "and have screwed thereon disks 40 containing notches 41 in their peripheies, and provided with hand-wheels 42, the portions of the disks 40 intermediate their notched portions` and the hand-wheels being of reduced diameter, as represented at 43, to provide grooves 44 into which ianges 45 von plates 46 secured to the ends of the s haft 30 by screws 47, extend, these plates carrying set-screws 48 eachadapted to be adjusted to enter the one of the notches 41 which opposes it. It will be understood from the foregoing that by. turning the hand-wheels, -assuming the set-screws 48 to have been adjusted to withdraw their ends from .the notches 41,\ the presser-head 27 may be adjusted toward or away from the bar 23, and the set-screws 48 thereafter turned to enter the opposing notches 41, to prevent disarrangefment of the adjustment.

In the operation of the machine, the carriage 18 is vreciprocated and the shaft 36 automatically actuated to draw the presserhead 27 downwardly int'o clamping engagement with the superposed strips vof paper extending' over the bar 23 of the carriage during .the movement of the carriage to the right in Fig. 1 for feeding a predetermined length of the superposed sheets to the cutting mechanism; and to raise the head out of the clamping engagement with the paper before the carriage begins its return move ment, viz., to the left in Fig. 1; these operations being effected by the following described mechanism: Fixed on the shaft 49 journaled in bearings 50 on the frame, is a sprocket-wheel 51, the shaft 49 being adapted t0. be driven from a pinion 5,2 fixed -on a collar 53 adapted to be releasably connected, by means of a clutch 54, with a driveshaft 55, driven in any Jsuitable manner, and engaging a gear 56`xed on the shaft 49. Located between the end-members 12 and in line with the sprocket 51 isa sprocket 57 journaledon a pin 58 having an enlarged inner end 59 flattened at its upper and lower sides, as represented at 60 and 61 (Fig. 9), and fitting 'at said flattened portions between parallel bars 62 spaced apart and supported at their ends on the end- ^members 12. The pin 58 is adjustable toward and away from' the sprocket 51 by moving it along the guide-bars 62, and as a convenient means of providing for such adjustment I journal in one of the endmembers 12 one end ofa rod 63, which parallelsl the bars 62 and screws at its threaded, opposite end 63a into the pin 58, whereby upon turning the rod 63 the pin 58 `is adjusted toward or away from `the lsprocket 51 depending on the direction in which the rod 63 is turned;y A sprocketchain 64 engages the sprockets 51 and 57, and one of its links carries a pin 65 which extends laterally of the chain and pivotally connects with a pair of parallel links 66 spaced apart at the ends which engage the pin 65, by a washer 67, and straddling at their other ends one of the arms 68 of a rock-lever 69 rigidly connected at its upper end to the shaft 36, a pin 70 passing through the arms 68and links 66 and pivotally connecting these links with the lever 69 intermediate the ends of the latter. The lower end of the lever 69 carries a roller 71 located between the arms and confined therein bv a journal-pin 72 passing through these arms l and the roller. The roller coperates with a` block 73 having its forward end rounded, as indicated at 7 3a, this block being located beneath the roller and having threaded enmedusa gagement at a depending extension 74 thereon, with the screw-threaded portion 75 of a -rod 76 journaled in the end-frames 12 and having an operating hand-wheel 77 for turning the rod 76 to. adjust the block 73 lengthwise of the machine, a rod 78 secured in the end-frames 12 to extend lengthwise of the machine, passing through the eXten- Sion 74 and partially extending into a groove in the bottom of the block 73, serving as a guide for ,the latter and holding it against turning.

- The operation of the machine is as follows: Assuming the superposed strips of paper to be operated on by`the machine and illustrated at 80, to extend at their forward ends between the cross-bar 23 and the bar 27, and the carri-age 18 to be at the limit of its return stroke, which is the position illustrated in Fig. 3, and in which position the head 27 is raised and the rock lever 69 inclines to the left in Fig. 3 with the roller yabove the block 73, rotation of the shaft 49 causes the chain 64lto travel in the direction indicated by the arrow in Fig. 3, and by reason of the link-connection with the lever 69 moves the carriage 18 along the guides 14 to the right in this figure, the roller 71 bearing against the top of the block 73. The carriage continues to move to the right in Fig. 3, as stated, until the roller reaches the forward end of the block 7 3, at which time the rock-member swings to the right in this ligure under the action of the links 66 pulling thereon with the result of rocking the shaft 36 in a direction to move the presserhead 27 downward into clamping engagement with the paper 80. As soon as the head has lo-wered sufcientlyI far to securely clamp the paper between it and the bar 23, for overcoming the resistance offered by the paper to its movement along the machine (Fig. 5), in which operation the -,bars V16 yield downwardly, the carriage again moves to the right in Fig. 3 drawing the paper 80 with it and advancing it to the cuttingmechanism above referred to, the `carriage continuing to feed the paper, as stated, until the pin 65 passes over a horizontal line drawn through the axis of the wheel 51, and starts to move to the left in Fig. 1. llnthis movement of the pin 65 the links 66 are shifted tothe left in said figure, thereby rocking the member 69 also to the left in this ligure to the angular position represented in Fig. 3, which causes the presserhead 27 to be lifted out of enga-gement with the paper 80 before the carriage 18 starts on its return, movement to the position illustrated in Fig. 3. 'lihe member 69 continues to swing to the left in Fig. 3 until arrested in the angular position represented in this figure, by the engagement of the inner ends of the pins 34 with the underside of the crossbar 23 (Fig. 6). As soon as the member 69 rocks to the position just stated the carriage starts to return to the position illustrated in Fig. 3, the paper being held out of/ engagement with the bar 23 by resting on the bars 16 which spring up as shown in Fig. 6 when thel head 27 rises, the carriage continuing this movement until the pin 65 passes above a horizontal line drawn through the axis of the sprocket 57, whereupon the carriage again moves to the right in Fig. 3 until the roller passes the forward end of the block 73 at which time the presser-head 27 clamps the paper, and the feed of the carriage with the paper clamped thereto continues as' hereinbefore explained. Thus the mechanism :operates automatically to feed the paper to the cutting-mechanism during the movement of the carriage in one direction only, thereby effecting intermittent feeding of the paper.

lit will be readily understood from the foregoing that by adjusting the block 73 lengthwise of the machine, the presser-head 27 may be caused to descend and clamp the paper at different stages in the movement of the carriage 18 to the right in Fig. 3, and thus the length ofo paper fed to the cuttingmechanism may be varied as desired. Furthermore, by this adjustment differences in the thickness of the mass ofsheets operated on'7 and the varying resistances afforded by the rolls of.y paper 4as they lessen in size, and from which thesheets 80 are drawn, may be compensated for, to insure the desired length of feed.

lt is desirable that the carriage be held against movement during the clamping and unclamping operations described, andas a desirable means for this purpose, l providel those ,illustrated which comprise split-rings 81 of leather, fiber, or other suitable material, which surrounds the shafts 14 and are confined in grooves 82 insplit-collars 83 se- -cured to .the sleeves 21 as by bolts 84, clampin a section of the stack of sheets severedby 120 the cutting-mechanism will be of the same length, thereby reducing to the minimum the amount of waste in trimming. Furthermore, sufficient clearance Ais provided between the clamping-head 27 and the sheets to prevent cor tact of the head therewith on the return movement of the carriage.

While l have illustrated and described a particular embodiment of my invention, l do not wish to be understood as intending angles to the plane ofY movement of said carr1age, a clamping member A011 saidA carriage 'and engaging said guide-means and movable up and down thereon and in parallelism with said carriage and in a path rat-a right angleto' the path of movementI of the carriage, for clampingl sheets between it and said carriage, a rock-member connected with said carriage, means operated by said rock-member for actuating said clamping member, and means connected with said rock-member for rocking it to move vsaid clamping member to clamping position and actuating the carriage, operating during a portion `of their movement to move said Iclamping member into clamping engagement with the sheet without moving said carriage and thereafter, by the clamping action 'produced, move said carriage and with it the sheet.

2. In sheet-feeding mechanism, the com- `bination of a reciprocable carriage, a clamping member on said carriage and mvable up and down thereon, and in parallelism therewith, and inra path at a right angle to the ath of movement of the carriage, for clamping sheets-between it and said carriage, a rock-'member connected with said carriage,

means operated by said rock-member for ac tuating said clamping member, and means connected with said rock-member for rocking it to ^move saidfclamping member to clamping position and actuating the carriage, oper,- ating during a portion of their movement to move Said clamping meniberfinto clampingI engagement with the sheet without moving said carriage and thereafter, by the ,clamping action produced, move said carriage and with it the sheet, said last-named means benation of a reciproca lecarriage, a clamping member on sald carriage movable relatlve to said carriage and adapted to clamp sheets between it and said carriage, a rock-member connected with the carriage, means operated "by said rock-member for actuating Ysaid clamping nrember, means connected with said rock-member for rocking it to move said clamping member to clamping position and operating thereafter to advance said carriage, and means for preventing rocking of said rock-member under the action ofv said second-named means, until said carriage has moved a predetermined distance.

4. In sheet-feeding mechanism, the comf` tive to said carriage and adapted to clamp sheets between it and said carriage, a rockv member connected with the carriage,.means pperated by said rock-member for actuating said clamping member, means connected with said rock-member forrocking it to move said clamping member to clamping position and operating thereafter to advance said carriage, and adjustable means `Vfor preventing rocking of \said rock-member under the action of said second-named means until said carriage has moved a predetermined distance:

5. In sheet-feeding mechanism, the combination 'of a reciprocable carriage, a movable clamping member on said carriage for clamping sheets between it and said carriage only by pressure exerted by said clamp, a rock-member on said carriage, means connected withv said rock-member and with said clamping member for actuating the latter, a traveling member, and a member connecting said traveling member with said rock-member, for the purpose set forth.

6. In sheet-feeding mechanism, the combination cfa reciprocable carriage, a clamping member on said carriage for clamping sheets between it and said carriage, a rockmember on said carriage, means connected with said rock-member for actuating said clamping member, a traveling member, a member connecting said traveling member with said rock-member, and means for preventing rocking of said rock-member under the action of said traveling' member, until said 'carriage has moved a predetermined distance. l

,7.. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage for clamping sheets between it and saids'carriage. a rckmember on said carriage, means connected with said rock-member for actu'atn said, clamping member, a traveling mem er, a member connecting said traveling member with said rock-member, and means for preventing rocking of said rock-member under the action of said traveling member, -until said carriage has moved a predetermined distance, adjustable for regulating the length of feed.

8. In sheet-feeding mechanism, the combination of a reciprocable carriage,\a clamping member on said carriage movable up and down thereon in a path^at a right-angle to the path of movement of the carriage and adapted to clamp sheets between it and said carriage, a rock-member on the carriage, means operated by said rock-member for actuating said clamping member, means connaoacea l vance'said carriage, and means for preventing rocking of said rock-member under the action of said second-named means, until said carriage has moved a predetermined distance. v

9. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamp-` ing member on said carriage movable up and down thereon in a path at a right-angle to the path of movement of the carriage and adapted to clamp sheets between it and said carriage, a rock-member connected with the carriage, means operated by said rock-memberr for actuating said clamping member, means connected with said roclvmember for rocking it to move said clamping member to clamping position and operating thereafter to advance said carriage, and adjustable means for preventing rocking of said rockmember under the action of said secondnamed means, until said carriage has moved a predetermined distance.

10. Insheet-feeding mechanism, the combination of areciprocable carriage, a clamping member on. said carriage, movable up and down thereon in a path at a rightangle to the path of movement of the carriage for clamping sheets between it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member in a direction relative to said carriage, a traveling member, and a member connecting said traveling member with said rock-member for actuating said clamping member relative to said carrlage and moving said carriage, for the purpose set forth.

11. In sheet-feeding mechanism,'the combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereonf in a path at aright-angle to the path of movement of the carriage for clamping sheets between it and said carriage, a rock-memberJ on,F said carriage, means connected withfsaid rock-member for actuating said clamping member, a traveling member, a member connecting said traveling member with said rock-member, and means for preventing rocking of saidrockmember under the action of said traveling member, until said carriage has moved a predetermined distance.

12. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereon vin a path at a right-angle to the path of movement of the carriage for clamping sheets between it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member, a traveling member, a member connecting lsaid traveling member withsaid rock-member, and-means .for preventing rocking of said rock-member 55 yunder the action of said traveling member,

until said carriage has moved a predetermined distance, adjustable for regulating the length of feed.

. 13. In sheet-feeding mechanism, the combination 0f a reciprocable carriage, a clamping member on said carriage and adapted to clamp sheets between it and said carriage, a rock-member on said carriage, means Connected with said rock-member foractuating said clamping member, a member adapted .to be moved in an endless path, and a member connecting said last-named member with said roclmnember, for the purpose set forth. .14. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage and adapted to clamp sheets between it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member, a member adapted to be moved in an endless path, a member connecting said last-named member with said rock;mem ber, and means for preventing rocking of said rock-member under the action of said traveling member, until said carriage has moved a predetermined distance.

15. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage and adapted to clamp sheets between it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member, a member adapted to be moved in an endless path, a member connecting said last-named member with said rock-member, and means for preventing rocking of said rock-member under the action of said traveling member until said carriage has moved a predetermined distance,

adjustabler for regulating the length of-feed.

16. In sheet-feeding mechanism, the combination of a reciprocable/carriage, a clamping member on said carriage movable up and down thereon in a path at a right-angle to the path of movement of the 'carriage for lclamping sheets between it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member,.a member adapted to be moved in an endless path, and a member connecting said lastnamed member with said rock-member, for

the purpose set forth.

17. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereon in apath at a right-angle to the path of movement of the carriage for clamping sheets between it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member, a member adapted to be moved in an endless path, a member connecting said last-named member with said rock-member, and means for preventing rocking of said rock-member under the action of said traveling member, until said carriage has moved a predetermined distance..

18. In sheet-feeding mechanism, the .combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereon in a path at a rightangle lto the path of movement of the carriage for Isaid rock-member, and means for preventing'rocking of said rock-member under the action of said traveling member,'until said carriage has moved a predetermined distance, adjustable for regulating the length of feed.

19. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable relative-to said carriage and adapted to clamp sheets between it and said carriage, a rockmember on said carriage, means connected with said rock-member for actuating said clamping member, a suitably supported endless sprocket-chain, .means /for driving said chain, and a link connected with said chain and with said rock-member.

20. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereonv in a path at a right-angle to the path of movement of the carriage for clamping sheets between itI and saidA carriage, a rock-member on 'said carriage, means connected with said rock-member fo actuating said' clamping member, a member adapted to be moved in an endless path, amember connecting said last-named member 'with saidrock-member, and means for preventing rocking of said rock-member under the action of said traveling member, until said carriage has moved a predetermined distance.

21. In sheetfeeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable relative to said carriage and adapted to clamp sheets between it and said carriage, a rockmember on said carriage, means connected with said rock-member for actuating said clamping member, a suitably-sup orted endless sprocket-chain, means for riving said chain, a link connected with said chain and with said rock-member, a'nd means for preventing rocking of said rock-member under the action `of said link, until the carriage has moveda predetermined distance, adjustable for regulating the length of feed.

22. In sheet-feeding mechanism, the combination of a reciprocablecarriagaa clamping member on said carriage movable up and down thereonin a path at a right-angle to the path of movement of the carriage for clamping sheets between. it and said carriage, a rock-member on said carriage, means connected with said rock-member for actuating said clamping member, a suitably supported endless sprocket-chain, means for driving said chain, and a link connected with said chain and with said rock-member.

23. In a sheet-feeding mechanism, the combinationy of a reciprocable carriage, a clamping member on said carriage movable up and down thereon in aV path at a rightangle to the path'oil movement of the carriage for clamping sheets between it and said carriage, a rock-member on said carriage, means connected withsaid rock-member for actuating said clamping member, a suitably supported vendless sprocket-chain, means for driving said chain, a link oo nnected with said chain and with said rockmember, and means for preventing rocking of said rock-member under the action of said link, unt-il usaid carriage has moved a predetermined distance, adjustable for regulating the length of feed.` v

24. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereon in apath at a right-angle to the path of movement of the carriage, a

rock-shaft on said carriage, means connected with said rock-shaft and with said clamping member for actuating the latter, a lever connected with said rock-shaft, an endless traveling member, a link connected with said endless member and with said lever, and a block adapted to be engaged by said -lever during a portion of the movement ofsaid traveling member and operating to prevent the movement of said clamping member to clamping position until said lever passes said block. l

25. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable up and down thereon in a path at a right-angle to the path of movement of the carriage, a rock-shaft on said carriage, means connected with said rock-shaft and with said clamping member for actuating the latter, a lever connected with said rock-shaft, an endless traveling member, a linkeonnected with said endless member and with said lever, and a block supported on the machine to be adjustable lengthwise of the path of movel ment of said carriage, said block being adapted to be engaged by said lever during a portion of the movement of said traveling member and operating to prevent the move- -ment of said clamping member to clamping igacaoea riage, a rock-shaft 'journaled on the carriage and having crank connection with said clamping member, a lever connected with said rock-shaft, sprocket-wheel supported Aon the machine, a sprocket-chain engagmg said wheels, meansfor actuating said wheels, a link connected at one end with said chain and at its opposite end with said lever in termediate theends of the latter, and a block mounted to be adjustable lengthwise D of the machine and adapted to be engaged by the lower `end of `said lever and operating to prevent said rock-shaft from moving to a position in which said clamping mem-I ber clamps the sheets, until said carriage has moved a predetermined distance.

27. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage .movable relative thereto and adapted to clamp sheets between it and said carriage, a rock-member connected with saidcarriage, means actuated by said rock-member for actuatin said clamping-member, and means connecte with said rock-member operating to exert force in the plane of movement of'said carriage, said rock-member being pivoted to saidcarriage in a plane crosswise of the plane in which said means operate,gwhereby said last-named means operate to move said clamping-member to clamping position and thereafter advance said carnage.`

28. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping member on said carriage movable relative thereto and adapted to clamp sheets between it andsaid carriage, a rock-member connected with said carriage, means operated by said rock-member for actuating said-clamping member, an arm xconnected with said rock-member, and lmeans connected with said arm operating `to exert force in the plane of .movement of said carriage, said rock-member being pivoted to said. carriage in a plane, crosswise of the plane in which said means operate, whereby said last-named means operate to move said clamping member to clamping position and thereafter advance said carriage.

v29. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clampingmember on said 'carriage movable relative thereto and adapted to clamp sheets between it and said member, a rock-member connected with said carriage, an arm on said rock-member, a surface against which said arm moves restraining the rocking of said rock-member toa position in whichy said clamping member is in clamping position, and means operatively connected Ywith saidrock-member for rocking the latter, ex-

said rock-member, a surface against which said arm moves restraining the rocking of said rock-member to a position in which said clamping member is in clamping position, and means operatively connected with said rock-member for rocking the latter, excepting as restrained by said surface, and shiftin said carriage, said surface being adjusta le lengthwise of said carriage to vary the point at which the clamping o peration takes place.

31. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamping rmember on said carriage movable relative thereto' and adapted to clamprsheets between it and .said member, a rock-member connected with said carriage, an arm on said rock-member, a surface against which said arm moves restraining the rocking of said rock-member to a positionin which said clamping member is in clamping position, and means operatively connected with said arm for rocking said rock-member, exceptingas restrained by said surface, and moving said carriage.

32. In sheet-feeding mechanism, the combination of a reciprocable carriage, a clamplng member 0n saidv 'carriage movable relative'thereto andtadapted'fto clamp sheets between it and said carriage, a rock-member connected with said carriage, means connecting said rock-member with said clamping member and operating to move the latter relative to the carriage, an arm on said rockmember, a drive member, and a connector l,between said drive member and saidy arm,

tive to the carriage, an arm 0n said rockmember, a drive member, and a link piv-` otally connected with said arm and with said drive member, said arm extending at an angle to the direction of force exerted against it by said link.

34:. In sheet-feeding mechanism, the combinationof a reciprocable carriage, a clamping member on said carriage and movable toward and away fromv the latter, and means for' causing the clamping member to clamp the sheet for feeding it, 'at one' of a num-v ber of points atthe beginning of the movementof said carriagein a direction for feeding, Without varying the feed at the other end of the movement of said carriage.

35. In sheet-feeding mechanism, the combination of a reciprocable carriage, guidemeans on said carriage extending at a right angle to the plane of movement of said carriage, a clamping member engaging and movable along said guide-means toward and away from said carriage, and means connected With said clamping member for actuating the latter and operating by the clamping grip of the clamp on the paper to advance the carriage in the sheet-advancing operation. o

36. In sheet-feeding mechanism, the combination of a reeiprocable carriage, guide- L ment with the sheet, Without moving said carriage, and thereafter, by the clamping action produced, move said carriage and with it the sheet.`

HENRY BOSCH.

In presence of L. HEISLAR, N. B. DEARBORN.

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