US1518171A - Machine for operating upon blanks of sheet material - Google Patents

Description

E. E. WINKLEY MACHiNE FOR OPERATING UPON BLANKS OF SHEET MATERIAL Filed Nov. 15, 1919 s Sheet s-Sheec 1 Dec. '9, 1924- E. E. WINKLEY MACHINE FOR OPERATING UPON BLANKS OF SHEET MATERIAL 8 Sheets-Sheet 2 mam? Filed Nov. 15. 1919 rll I. at

E. E. WINKLEY MACHINE FOR OPERATING UPON BLANKS 0F SHEET MATERIAL Dec. 9, 1924- 8 Sheets-Sheet 13 Z7zae7d0r Dec. 9,1 4 1,518,171

' E. E. WINKLEY IACHINE FOR OPERATING UPON BLANKS 9F SHEET MATERIAL Filed NOV. 15, 1919 8 Sheets-Sheet 4,

Dec. 9. 1924. 1,513,171

v E. E. WINKLEY MACHINE FOR OPERATING UPON'BLANKS OF SHEET MATERIAL Filed Nov. 15. 1919 a Sheets-Sheet s meat/6,02"

Dag, 9, 1924. 1,518,171

- 5. E. WINKLEY IACBINE FOR OPERATING UPON BLANKS OF SHEET MATERIAL Filed Nov. 1 1919 s Sheds-Sheet e E. E. WINKLEY MACHIN E FOR OPERATING UPON BLANKS OF SHEET MATERIAL Filed Nov. 15, 1919 QSheets-Shee't 7 I Deg, 9,

, E. E. WINKLEY IACHI NE FOR OI ERATING UPON BLANKS OF SHEET MATERIAL Filed NOV. 15, 1919 8 Sheets-Sheet B Patented Dec. 9, i924.

Nrrno sraras ATENT OFFICE.

ERASTUS E. WINKLEY, OF LYNN, MIASSACHUSETTS, ASSIGNOR TO UNITED SHOE MA- CHINERY CORPORATION, OF PATERSON, NEW? JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE FOR OPERATING UPON BLANKS F SHEET MATERIAL.

Application filled November 15, 1919.

To all whom it may concern;

Be it known that I, Ennsrus E. VVINKLEY, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in a Machine for Operating upon Blanks of Sheet Material; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to machines for operating upon blanks of sheet material and is herein illustrated as embodied in a machine for skiving heel lifts and arranging them conveniently for removal from the machine.

The object of the invention is to re-organize and improve the construction of machines of the character named for the purpose of rendering them more efficient in operation.

To the accomplishment of this object and such others as may hereinafter appear, as

will be readily understood by those skilled in the art, the invention comprises the fea tures and combinations of parts hereinafter described and particularly pointed out in the appended claims.

The various features of the invention will be best understood from a description of the preferred embodiment thereof, illustrated in the accompanying drawings, in which Figure 1 is a view in front elevation of the machine; Fig. 2 is a top plan view of the machine on an enlarged scale, a portion thereof being broken away; Fig. 3 is a view, in elevation, partly broken away and on an enlarged scale of the right hand end of the machine; Fig. 4-, is a vertical sectional view taken substantially on the line 44 of Fig. 2; 5 is a vertical sectional View taken substantially on the line 5-5 of Fig. 1-; Fig. 6 is a horizontal sectional view taken on the line 66 of Fig. 1, but on a larger scale than the latter figure; Fig. 7 is a vertical sectional View on the line 77 of Fig. 1., but on a larger scale; and Fig. 8 is an enlarged sectional plan view of a portion of the machine showing particularly the stop mechanism.

Serial No. 338,234.

In. the illustrated machine, the heel lifts to be operated upon are held and advanced in a horizontally extending stack upon a feed table and are withdrawn one at a time 'knife. The skived lift passes downwardly at one side of the knife where it is frictionally held until it is pushed by the succeeding lift in front of a stacking blade. I The stacking blade operates to deliver the lift to a magazine in stacked relationship with the lifts previously delivered thereto.

Referring to the drawings, the machine comprises, in general, a frame 10 (Fig. 1) upon which the various parts and operating mechanisms of the machineare mounted; a horizontal feed table 12 which is located at the top of the frame 10 and on which the lifts to be operated upon are stacked face to face with their breast edges resting on the table; a pair of intermittently operated endless feed chains 14 2), each having a plurality of pawls 16 for engagingsthe lifts and feeding them across the table; a gage plate 18 (Figs. 3 and a) located above the lifts at the inner end of the stack to prevent any substantial upward displacement of said lifts; a stop member 20 having an annular portion against which the endmost lift in the stack is pressed as the stack is yieldingly advanced by the feed chains; a pair of clamping jaws 22 for securely holding in position a plurality of lifts at the inner end of the stack between successive movements of the feed chains 14.; a reciprocating picker 24: (Fig. 4) which periodically advances through the annular portion the stop member 20 to seize the endmost lift of the stack, and which is retracted, together with said stop member, to withdraw the lift from the stack, and then release the lift; a pusher 26 for operating upon the liftas it is released by the picker 24 and projecting it downwardly in a substantially verdeal plane; a pair of horizontal feed rolls 28 and 30 between which the lift is introduced by the pusher 26; a stationary, vcr tically disposed skiving knife 32 for shiving the lift as it is forced by said feed rolls against the adjacent cutting edge of the knife; a uiding plate 34 for directing the skived lifts downwardly at the required angle; means for insuring an orderly passage of the lifts after leaving the feed rolls, comprising a yielding lift-retaining linger 36 which frictionally engages the lift issuing from the feed rolls and holds it against the guiding plate 34 until it is released by the advance of the succeeding lift; an oscillatory stacking blade 38 in front of which the lift is pushed; a magazine 40 into which the lifts are delivered in stacked relation by the stacking blade 38; and stop mechanism which is indicated generally at 42, in Figs. 1 and 4, for automatically stopping the machine upon an interruption of the continuity of the passage of the skived lifts into the magazine 40.

The frame 10 comprises a pair of standards 44 (Fig. which are located at the a front and rear of the machine and are rigidly connected together by suitable tie rods and braces, and a substantially rectangular head 46, which is supported by the standards 44, the flat top-surface of the head 46 constituting the .feed table 12. The various mechanisms of the machine are actuated by a plurality of cams which are secured upon a cam shaft 48 (Figs. 1 and 4) whichextends horizontally across the machine, from the front to the rear thereof, and is jonrnaled in the lower portions of the standards 44. Atthe rear of the machine the cam shaft 48 is provided with a fast pulley 50 which is adapted to receive a belt that is driven from any suitable source of pow r. and a loose pulley 52 is provided onto which the belt may be shifted when it is desired to stop the machine. The various cam levers are pivotally mounted upon a rod 54 (Fig. 3) which extends across the machine between the standards 44.

The lift feeding mechanism is shown particularly in Figs. 1, 2, 6 and 7. A stack of lifts X (Figs. 1 and 2) is supported with the breast edges of the lifts resting upon the feed table 12 and the lateral edges thereof confined between vertical guiding surfaces 56 which constitute parts of housings 58 in which the two feed chains 14 are arranged with parallel stretches extending along the sides of thestack. The feed pawls 16 with which the chains 14 are each provided at intervals, project inwardly beyond the guiding surfaces 56 and are spring pressed outwardly from the chains so that the pointed ends of. the pawls may engage the lateral margins or side edges of whatever lifts chance to lie adjacent them and thus feed the stack forwardly as a consequence of the movement of the chains. Owing to the yieldable character of the pawls 16 additional lifts may be introduced between corrcsIunuh ing pawls on the opposed 'etches of the chain by pushing the lifts forward between the chains. As shown in. Fig. T. the feed pawls 16 are pivotally mounted upon pins 60 which project upwardly and dowinvardly from the pawls into guiding grooves Q and 64 which are formed respectively in the housings 58 and in frames 66 which are mounted on the feed table 12. The parallel inner edges 67 of the frames 66 cmistilute additional guiding surfaces for the lateral edges of the stack of lifts on the feed (able.

The feed chains 14 are snipportcd by min-in. of sprocket wheels 68 (Fig. the wheels being fixed on the upper ends of shafts To which are journaled vertically in the f ames 66. In order to drive the chains if. the shafts 70 at the outer ends of the frames 66 are provided, as shown in Figs. 6 and 'i" with worm wheels 72 at their lower ends and these worm wheels engage right and left hand worms on a shaft 74 which is jonrnaled transversely in the head 46 below the feed table 12. The shaft 74 is actuated intermittently by means of pawl and ratchet mechanism, which is shown in Figs. 1. and 6. said mechanism comprising a ratchet wheel T6 sccured to the shaft 74, a driving pawl T6 carried by a rocker arm 80, pivotally mounted upon. the shaft 74, and a suitable holding pawl 82 pivoted on. the head 46.

The rocker arm 80 is bent downwardly at its outer end and is connected by a linh fi-h with one arm of a cam lever 96 (Figs. 4 and 6) that is fulcrumcd on the rod 5 .1. The other arm of the lever 66 is provided with a cam roller 88 which is adapt ed to engage the periphery of a cam 91; on the (N111 shaft 48, the roll being held in engagement with the cam by means of a spring 652. M the proper time in the cycle of the nurchino the cam 90 permits the spring 92 to actuate the cam lever 66 so as to rock the arm 80 in a direction to advance. the feed chains yieldingly through the space of one feed movement, or until the lift at the end of the stack has been brought into contact with ihc stop member 26. Continued rotation of the cam 90 actuates the cam lever positivclv in the opposite direction and rocks the arm W hack to its original position.

In order to adjust the feed mechanism to operate upon lifts of difi'erent sizes. it is necessary to move the chains 14 together with the opposed lift guiding surfaces Tu; and similar surfaces 67 toward and from each other, respectivclv. ,x\crordingly, the frames 66 are arranged to move transversely on the feed table 12 and to this end each frame 66 is provided with two studs 34 (Fig. near the opposite ends of the frame and these studs project downwardly through slots 96 in the base webs of the frame. It will be observed that the studs are arranged in pairs, the individual studs of each pair be ing on opposite frames 66 and arranged nearly opposite each other. The substantially opposed studs 94 of each pair are connected by linlrs 98 with opposite ends of a lever 100 which is fulcrumed upon a stud 102 projecting from the underside of the feed table 12. As shown in Fig. '1', a nut 104 is provided at the lower end ofeach stud 94 for the purpose of supporting the link 98 which is pivoted thereon. In order to provide for simultaneous inward and outward movements of the frames 66 and feed chains 14, and to insure that the opposite feed chains shall he maintained in paralleh ism with each other as they are moved toward and from each other, each lever 100 is provided with a third arm 106 (F and these arms 106 are connected by means of a link 108. One of the studs 94 extends upwardly through the frame 66 andv the housing 58, and its upper end is threaded above the ho-us ing and provided with a hand nut 110. Said stud 94 is prevented from turning in the frame 66 by means of a set screw 112 in the frame which projects into a slot 114. in the stud, and when the nut 110 is tightened the link 98, through which said stud 94 extends, will be clamped between the nut 104 at the bottom of the stud and the underside of the feed table 12. By loosening the nut 110 and shifting its stud 94 laterally in the slot 96, the feed chains 14 and the opposed lift guiding surfaces may be conveniently adjusted toward or from each other simultaneously and by a single operation.

The gage plate 18 which prevents substair tial upward displacement of the lifts at the forward or inner end of the stack on the feed table is secured to the lower end of a stem 118, as best shown in Fig. 4. The stem 118 is externally screw threaded and extends vertically through a sleeve 120 which is mounted to turn without longitudinal movement in a bearing formed in a cross bar 122 which is supported above the feed table. The gage plate 18 is ll-shaped in cross-section (see Fig. 3) so as to enable it to engage the curved rear edges of the lifts on opposite sides of a medial line perpendicular to the breast edge thereof and thus more efficiently prevent upward displacement due to tilting of the lifts about one or the other of their breast corners. The gage plate, together with the stem 118, is prevented from turning by means of a pin 124 which projects upwardly from the gage plate and ex tends into an opening in the cross bar 122. At the top of the sleeve 120 a head 126 is provided by means of which the sleeve may be readily turned to adjust the vertical position of the gage according to the size of the lifts being operated upon.

In order to insure that each feed movement imparted to the stacl; of lifts of the feed table shall advance the endmost lift into proper position to be seized by the picker 24, the stop member 20 is employed. This stop member is periodically brought into position to arrest the advancing movement of the lifts and retracted to permit the with drawal of the endmost lift by the picker. The stop member 20 is provided with an annular portion 130 (Fig. 4), one lateral face of which is arranged to engage the end lift of the stack while the opening through said portion permits the passage therethrough oi the picker as it is advanced to seize a lift Extending perpendicularly to the annular portion 130 of the stop member is an arm 132 2} which is mounted in a bearing 134 on the. feed table for longitudinal sliding movement to permit the stop member to he alternately advanced or retracted in the manner described.

The sliding movements of the stop member 20 are effected by means of an operating lever 1236 (Figs. 2, and 4) fulcrumed between its ends on a rod 138 which is secured in the standards 44, the upper end of the lever 136 being pivotally connected with the arm 132 of the stop member by means of a pin 140 which projects from said arm and extends through an opening in the lever. 'llhe lower end of the lever 136 is connected by a link 14.2 with a cam lever 144 that is fulcrumed on the rod 54 and is provided with a cam roll 146 which is acted upon by cam 1.48 on the cam shaft 48, so as to positively advance the stop member 20 into operative position. A spring 150 holds the cam roll 146 against'the cam and effects the retraction of the stop member 20.

\Vhen the picker 24 is pressed into engage ment with the endmost lift in the stack on the feed table, as will presently be explained, it is necessary to hold the stack firmly to prevent it from yielding to the pressure of the picker, particularly when a stack is so long that the elasticity of the lifts would permit considerable movement under such pressure. Accordingly, means is provided for clamping the lifts near the inner end of the stack after each feed movement of the chains 14, said means comprising the pair of clamping jaws 22 which act upon the opposite lateral edges of the lifts. The clamping jaws 22 are carried at the lower ends of a pair of clamp arms 152 (Figs. 3, 4 and 5) which are pivotally mounted on studs 154, projecting from the cross bar 122, so that the clamping jaws may be swung into and out of clamping position. The clamping jaws 22 are constructedof yielding material which will firmly grip the edges of the lifts.

in order that the clamping surface of the jaws 22 may conform to the inclination of the edges of the lifts and ma be adjusted to suit lifts of different forms and sizes, the are set into blocks 156 having cylindrical outer surfaces engaging concave sockets in the clamp 22 ms 152. The clamp jaws are adjustably secured in the sockets by bolts 158 extending through vertical slots in the clamp arms. In order that the lift at the forward. or innen. end of the stack may be readily withdrawn by the picker when the clamp are in clamping; positiom each clamp jaw is bevelled 160 (Fig. 4-.) t. ..ent the forward end of its lift en surface so that the endmost lift will not be engaged and clamped by the js 'llhe bevelled faces 160. will however tend to prevent lateral displacement or ti ting of the lifts when they are be' j the picker. The clamp arms 14).. eonsti 'i tions of hell crank levers the other which project toward each other nate in segmental gears 102 which into and cause the clamp arms to ha" 1 ;aneous inward and outward i'novements. The clamp arms 152 are normally held in open or inoperative positions by means of a spring 16 1 which connects upward extensions on the two arms.

The means for actuating the clamp arms 152 comprises an arm 168 (Figs. 2, 3 and 5) which is pivoted on one of the studs 154: for

vertical swinging movement adjacent the corresponding clamp arm 152 and is provided with a laterally irojecting. lug 168 through which a screw 170 extendsand engages a lug 172 formed on the adjacent clamp arm 152. The arm 166 is connected by a link 17% with a cam lever 170 (see also 1) that is fulcrumed on the rod 541. The cam lever 1T8 carries a cam roll 1'? 8 which is engaged by a cam 180 on the cam shaft 48, the roll being held against the cam by a spring 182. After the stack of lifts on the feed table has been advanced by the feed chains 14- against the stop member 20, the cam 180 permits the spring 182 to actuate the arm 186 and close the clamping jaws 22 yieldingly upon the lifts. The arm 166 is thereafter positively returned by the cam 180 and the clamping arms 152 are then opened by the spring 16 1.

The picker mechanism is shown particularly in Figs. 1, 2, 3 and 41-. The picker 241 has shank which is supported and guided. in a tubular guideway 18d that is secured to the top of the feed table 12. The shank of the picker comprises a central rod or stem 186 upon the inner end of which is fixed. a sleeve 188 which fits and slides within the guideway. At the outer end of the shank a pinion 190 is fixed on the stem 186 the teeth of the pinion also fitting and being adapted to slide Within the guideway. At the inner extremity o f the shank is a head in which are secured a plurality of curved claws 192. These claws; project l'lGllCfllllJ i: run the head, that is, in such a direction that they may be introduced into a lift by a helical movement like that of a corkscrew. The construction of these claws and the manner in which they are mounted in the head is substantially the same as that disclosed in Letters Patent of the United tates No, 1.280.349, granted October 1. 1918. to the present applicant.

After .ie stop member 20 has been advanced into operative position, as shown in Fig. 4:. the head of the picker is advanced throu h the annular portion 130 o f the stop memin into engagnwbent with the cudmosi lift i the stack. 'wluireupim the head of the picker is rotated in a direction to project the claws 192 into the li ft. The lift having; been thus seized by the picker claws, both the stop member 20 and the picker are retracted simultaneously from the stack, the picker withdrawing the end lift until its curved rear ed 'e is lDlOiifjjiih directly beneath the pusher The stop member 20 is held stationai after being retracted, to definitely position the withdrawn lift in the path of the pusher 26. The end face of the picker is retracted slightly beyond the lift engaging face of the stop member and rotated in a direction to withdraw the picker claws from the lift as the latter is held by the stop memher from following up the picker. It will be seen that the stop member thus serves to strip the lift from the picker claws. The pusher 26 then projects the lift downwardly, through an opening 198 in the food table, and introduces the breast end of the bit between the feed rolls 28 and 30.

For the purpose of applying longitudinal movement to the picker, a sleeve 194: Ii: mounted to slide on the stem 186 and a com pression spring 196, surrounds the stem and is interposed between the sleeve 188 and a washer 198 which is splined to the stem and rests against the sleeve 194. The spring 190 acts to retain the sleeve 194t normally againstthe pinion 190, as shown in Figs. 2 and. a. The sleeve 191 has a lateral projection which extends through a longitudinal slot 200 in the guideway 18 1 which carries a roller 202. This roller is received in an openingin the upper end of a lever 201-. which fulcrumed on the rod 188 and is connected at its lower end by a link 206 with a cam lever 208 that is fulcrumed on the rod 5%. A cam roll 210 at the lower end of this lever is held by a spring 212 against a cam 211 on. the cam shaft 48. When the cam lever 208 is acted upon by the cam, the picker is advanced yielding'lv against the lift at the end oi" the stack, by means of the spring! 196.

After the picker has been advanced against a lift (it is rotated to cause the claws 192 to penetrate the lift. A lift having been seized by the picker, the picker is then retracted, together with the stop member 20, to withdraw the lift from the stack, and thereafter the picker is rotated in the opposite direction from that in which it was previously rotated, to remove the picker claws from the lift. The rotative movements are imparted to the picker by a rack bar 216 (Figs. 3 and 4), which is mounted to slide in a transverse bearing that is formed at one side of the guideway 184. The rack teeth mesh with the teeth of the pinion 190.

The rack bar 216 is actuated through a rod 218 which is supported and guided for vertical sliding movement in the bearing 220 that is secured to the head 46. In order that the movements of the rod 218 may be yieldingly communicated to the rack bar 216, the upper end of the rod, which is reduced in diameter. extends upwardly through the rack bar and projects above it sufiiciently to permit a spring 222 to surround the rod between a nut 224, at the top thereof, and the top face of the rack bar. The spring 222 normally holds the rack bar against a shoulder 226 on the rod 218. With this construction, the downward movement of the rod 218 holds the rack bar downwardlv, through the spring 222, and rotates the picker claws, causing them to yieldingly penetrate the lift. The downward movement of the rod 218 is derived from a cam lever 228 that is fulcrumed on the rod 54. The lever 228 is operatively connected at one end with the rod 218 and is provided at its opposite end with a cam roll 230 which is held by a spring 232 against a earn 234 on the cam shaft 48.

Inasmuch as the material of which the lifts are composed varies considerably in density, the yieldingly actuated picker claws penetrate more deeply into some lifts than into others and consequently the spring 222 will be COll'lPl'GSSGd to different extents by the dowruvard IHOVGll'lQlli; of the rod 218 after the picker claws have penetrated as far as possible into a lift. In order that there may be no tendency for the lifts to be rotated by the force of the compressed spring 222, the compression of the spring is relieved before the lift is withdrawn from the stack by the picker. To this end the extremity of the cam lever 228, which is operatively connected with the rod 218, is bifurcated to straddle the thickened lower end of said rod and is confined between a pair of flanges 236 (Fig. 4) which are spaced apart sufficiently to per niit the occurrence of lost motion between the lever 228 and the rod 218. When the spring 232 is permitted by the cam 234 to raise the end of the lever which actuates the rod 218, the rod is first permitted to be raised by the force of the spring 222 until the shouldcr 226 on the rod 218 engages the bottom face of the rack bar 216 and the spring 222 no longer exerts any force tending to rotate the picker claws. The stop member 20 and the picker 24 are then permitted by their re spective cams to be retracted simultaneously by the springs connected with their cam levers to effect the withdrawal of the lift from the stack. lVhile the lift is being withdrawn, continued movement of the cam lever 228, under the influence of its spring 232, brings the bifurcated. end of said lever into contact with the upper flange on the rod 218, thus lifting the rod and the rack bar 216 and rotating the picker in the opposite direc tion to withdraw the claws of the picker from the lift. The lift engaging face of the stop member 20 is serrated in order to prevent the lift from turning as the picker is rotated to release the claws from the lift and thus to insure that the breast edge of the lift will be presented squarely to the grasp of the feed rolls 28 and 30.

To permit the picker 24 to be conveniently removed from the tubular guideway 184, the upper arm of the lever 204 is jointed at 238 (Figs. 3 and 4) so that the upper extremity of said arm may be swung outwardly from the guideway to disengage the lever 204 from the roller 202. The rod 218 is also constructed in two parts join-ted at 240 and the rack bar through which the reduced upper portion of the rod 218 extends is confined in its bearing at the side of the guideway by a cover plate 242. The cover plate 242 is pivoted at 244 to the side of the guideway when it is maintained in position to hold the rack in its bearing by means of a pin 246. By removing the pin 246 and swinging the plate to one side, the upper portion of the rod 218 may be swung downwardly at the joint 24.0. carrying the rack bar with it out of engagement with the pinion 190. The picker may then be readily removed from its guideway or replaced therein.

lmn'iediately after being released by the picker 24, the lift is engaged by the pusher 26 and introduced thereby to the grasp of the feed rolls 28 and 80. The pusher 2600mprises a yoke-shaped head (see Fig. 3) which is formed at the free end of the upwardly extending arm of a lever 250 4). The lever 250 is fulcrumed on a stud 252 that is adjustably secured in a bracket 254 rising from the head 46 of the machine frame. The downwardly extending arms of the yokeshaped head of the pusher 26 are adapted to engage the curved rear edge of the lift which has been withdrawn from the stack. and the arms are spaced far enough apart to permit the annular portion of the stop member 20 to pass between the arms when it is returned to operating position. The downward movement of the pusher is so timed that the pusher comes into contact with the lift at about the time the picker is being rotated to retract the picker claws from the lift, and thus serves as an additional means ii (l for preventing the lift from participating in the rotative movement of the picker. The lift engaging arms of the pusher are pointed at their lower ends so as to resist any tendeney of the lift to turn in its own plane as it is being moved by the pusher. into the grasp of the feed rolls. The fulcrum stud 252 of the pusher lever 250 may be adjusted vertically in the bracket 25% to vary the working stroke of the pusher in accordance with the size of the lifts to be operated upon so as to insure that irrespective of their size the lifts will be engaged by the pusher at the same point in each cycle of operations of the machine and that the lifts will be pushed just far enough to positively introduce them between the feed rolls.

The pusher lever 250 is actuated by a cam lever 256 (Figs. 3and i) that is fulcrumed on the rod 5a and to which the pusher lever is connected bymeans of a link 258. The cam lever 256 carries a cam roll 260 which is held against a cam 262 on the cam shaft 48 by means of a spring 2652, the spring acting to impart the downward or operative movement to the pusher when per mitted to do so by the cam and the pusher being subsequently lifted positively by the cam to its normal inoperative position.

"The operation of the pusher 26 insures the stripping of the lift from the picker claws in case the lift should tend to cling to the claws after the picker has been rotated to release the lift. When the stop member is retracted, the pusher 26 is in its lower most position and the outer lateral face of the head of the pusher supports the endmost lift of the stack on the feed table and prevents it from falling out of place as the clamp'ng jaws 22 are opened preparatory to the next feed movement of the feed chains 14. Before the pusher is lifted the stop member 20 is advanced into operative position the annular portion of the stop member passing between the arms of the yoke shaped head of the pusher and serving to prevent displacement of the end lift after the pusher has been lifted to its normal position.

In heel lift skiving and stacking machines heretofore suggested the lifts to be operated upon are stacked one on top of another and are fed from the bottom of the stack to the operating instrumentalities of the machine. .Cons'derable difficulty has been experienced with machines of this general type when the lifts that are being operated upon are not perfectly flat but are somewhat warped or twisted out of shape. It is not at all unusual for lifts to be more or less warped or twisted and when such a condition prevails, the pusher may fail to engage and feed certain of the lifts or it may feed more than one of them at a time so that the mechanism will become jammed and stop the machine.

iVith the present construction. however in which the lifts are arranged on edge in a horizontal column, and a picker seizes the exposed face of the endmost lifn the fact that the lift is warped or twisted does not interfere with the lift withdrawing operation and a uniform and uninterrupted delivery of the lifts to the skiv ng mechanism is assured.

The skiving mechanism which comprises the two feed rolls 28 and 530 and the station ary knife 32 resembles, in its general con struction, the skiving mechanism COlTllllOlll used in the mamifacture of shoes to shire, split or even blanks of leather. As shown. the periphery of the roll 28 is serrated to facilitate the feeding of the lifts. lhe trunnions of the roll 28 are jmirnaled in bearing blocks 26S (Figs. i; and G) which are movable horizontally in suitable guideways and are acted upon by stiff springs 2T0 tending to force them toward the knife and normally to hold them against stop shoul ders 272 (Fig. 4-.) that are formed on the underside of the feed table. Each spri 270 is backed up by an adjusting bolt that is threaded through a portion of the head 46 and by means of which the tension of the springs can be adjusted.

The skiving knife 32 i: and Si is mounted upon a suitable frame piece 276 which is bolted to the head .:6 and the upper face of wh ch forms a portion of the guideway for the bearing blocks 26% in which the feed roll 2% is journaled. The opposite longitudinal edges of the knife 32 are beveled (Fig. 8) and are held against the vertical face of the frame piece 276 by means of two blocks 278 which are secured to the frame piece, the blocks hzwing beveled. edges which overlap the correspondingly beveled edges of the knife. The bottom edge of the knife rests upon a bolt 280 which is threaded int n a block 282 through which it extends verli cally, the block being provided with a lat-- eral projection 294 that fits into an opening in the vertical face of the frame piece 276 and holds the block in position beneath the knife. By manipulating the bolt 280. the knife may be removed or may be adjusted toward and from the plane of the axes of the feed rolls.

The shaft of ll e feed roll is journaled in hearings in a slide 286 (Fig. 4-) which is supported for horizontal movement in guidcway formed beneath the feed table. The roll 30 is pressed toward the roll 28 by a light spring 288 which encircles a rod 290 one end of which is fixed in a downwardly extending lug at the inner end oi the slide 286, while the opposite end of: the rod extends loosely through a bracket 292. which is bolted to the underside of the feed table the spring being interposed between the lug and the nearer side of the bracket.

The normal position of the roll with relation to the roll is determined by a stop nut 29% on the outer end of the rod 290 which is adapted to engage the adjacent side of the bracket 292. in addition to cooperating with the roll 28 to feed the lifts to the knife 32. the roll 30 also serves to position the breast edge of the lift widthwise with relation to the knife for the purpose of determining the thickness to which the lift is to be skived. To this end the roll 30 is permitted to move away from the roll 28 only a predetermined amount when a lift is introduced between the rolls. The movement of the roller is limited by a pair of blocks 296 (Figs. -fland which have wedge faces arranged in opposition to corresponding wedge faces at the adjacent edge of the slide 286. The blocks 296 rest upon a horizontal portion of the bracket 292 with the faces of the blocks which are opposite the wedge faces thereof in contact with a vertical face of the bracket.

Extending through the blocks 296 is a bolt 298 that is supported rotatively in the head 46 and is provided with right and left threaded portions on which the blocks are mounted. At the front of the machine the bolt 298 is provided with a knurled head 300 by means of which the bolt may be rotated to adjust the width of the space between the wedge faces of the blocks and the wedge. faces of the slide 286, and thus determine the operative position of the roll 30 by varying the distance through which the roll 30 may move away from the roll 28.

In order to enable the operator to set the machine so as to skive lifts to the required thickness :1. scale 302 is provided at the rear of the machine as shown in Fig. 2, and a pointer 304 is arranged to move forwardly 01' rearxwirdly across the scale as the wedge blocks 296 are adjusted toward or away from each other. To this end the rear of the bolt 298 is internally threaded to receive an externally threaded rod 306 (see also Fig. 6) the outer end of which projects beyond the bolt 298 and fits loosely in a guideway formed in a bracket 308 that is secured to the rear of the head 46. The rod 306 carries the pointer 30a which projects upwardly through a slot 310 in the bracket 368 and prevents the rod from turning as it is adjusted lol'igitudinally in the guideway by the turning of the head 300.

As best shown in Figs. 4', 5 and 6, the rollers 28 and 30 are driven by independent gear connections with a pinion 312 that rotates with a sprocket wheel 31% driven by a chain 316 which is driven by another sprocket wheel. 318 fast on the cam shaft 4.8. An idle adjustable sprocket wheel 320 (Fig. l) keeps this chain tight.

The passage of a lift between the feed rolls tends to move the roll 30' away from the roll 28 more or less depending upon the thickness of the lift. After the lateral movement of the roll 30 away from the roll 28 has ceased, the roll 30 then operates as if it were mounted rigidly, and the lift then causes the roll 28 to yield laterally against the tension of the springs 270 to an extent depending upon the thickness and the density of the lift. Since both rolls are positively driven in directions tending to feed the lift between them and force it against the cutting edge of the knife 32. the knife will skive off the part of the lift that passes between it and the roll 28, and. this part will be conveyed away from the machine as waste by means of a chute 322 (Fig. 4c) that is suitably supported on the frame of the machine, while that part of the lift which passes between the knife and the roll 30 is retained. By turning the bolt 298 by means of the head 300 the wedge blocks 296 may be adjusted to vary the movement of the roll 30 after it is engaged by a lift and thus determine the thickness of the lift in accordance with the indication on the scale 302. It is contemplated that the machine will be used to skive or even lifts which have been graded according to thickness or density and that therefore the roll 30 can be set according to the thickness or density of the lot of lifts being operated upon. This arrangement of the rolls enables them to press the lifts firmly be tween them even in case they encounter a lift much thinner than that for which they are set and consequently insures the accurate feeding of the lifts through the skiving mechanism notwithstanding substantial changes in the thickness or density of the lifts. If this mechanism is properly set the lifts come through it evened, or each reduced to a uniform thickness tln'oughout its area.

In order to insure that the skived lift, after leaving the feed rolls, shall be delivered to the stacking blade 38 (Fig. 4) in proper position to be stacked in the magazine 40, the lift is fed across the guiding plate 34, between a pair of lateral edge guides 326, and the spring retaining finger 36 presses the lift against the guiding plate and holds it temporarily after it has passed beyond the feed rolls, until it is pushed out from beneath the retaining linger by the succeeding lift. The guiding plate is suitably supported on the frame of the machineat the rear of the knife 32 and is adapted to guide the lift in front of the stacking blade 38. The lateral edge guides 326 consist of two parallel strips which projGCi; upwardly from the inner extremities of two parallel angle bars 330 which constitute the lift magazine 40. The retaining linger 36 is carried by a supporting strip which is secured to the guiding plate. By means of the lateral edge guides 326 the lift is prevented from rotating in its own plane as it passes from the feed rolls to the magazine and thus the breast edge of the lift is kept horizontal. The retaining finger 86 insures that the lift will be confined between the edge guides 326 during its passage from the feed rolls to the magazine.

The stacking blade 38 is secured to a rock shaft 3-32 (Figs. i and 5) that adapted to turn within bearings formed on one of a pair of brackets that are bolted to lie frame standards 44. The stacking blade is adapted to swing vertically back and forth between the angle bars 330 to alternately receive a skived lift and move it into stacked relation to the other lifts in the magazine 40. At the beginning of operations, before any lifts have been delivered to the maga zine, a block or dummy may be placed in the magazine to support the first of the lifts to be stacked therein. The means for actuating the stacking blade 38 comprises an arm 336 (Figs. 1 and 3) which is connected by means of a link 338 with a cam lever 34:0, carrying a cam roll which is held by a spring 344 against a cam 34-6 on the cam shaft 48.

The lift magazine 40 into which the skived lifts are delivered by the stacking blade 38 comprises the two parallel angle bars 330 (Figs. t and 5) which are adjustably mount ed on a pair of rods 350 (Figs. 4: and that are secured in the brackets 33 The webs of the angle bars 830 extend horizontally and vertically so as to provide, respectively supports for the breast edges of the lifts, and guides for their lateral edges. In -)rder to prevent the lifts from falling backwardly out of the open receiving end of the magazine a retaining pawl 352 (Fig. 8) is provided at the end of each angle. bar 380 the pawls being pivoted on studs 353 that are secured to brackets on the angle bars. The pawls 352 extend inwardly beyond the opposed vertical. faces of the angle bars and are normally held by suitable springs in the position shown in Fig. 8 to support the end lift in the magazine. The lateral edge guides 326 serve as stops to limit the movement of the lift retaining pawls 352 under the influence of their springs. The pawls 352 are free to yield inwardly to permit the entrance of the lifts into the magazine L0.

Inorder that the magazine 40 may be adjusted to accommodate lifts of different sizes, the angle bars 330 are arranged to move laterally toward and from each other on the supporting rods 350. To this end each angle bar is carried by a pair of blocks 354 (Figs. 4, 5 and 7) which are severally adapted to slide on the rods 350. In order to maintain the angle bars 330 in parallel relation with each other and to provide for moving them concurrently toward and from each other in equal degrees, the supporting blocks of each angle bar are severally provided with pins 358 which are received in the forked ends of upwardly extending arms 360 that are secured to one or the other of a pair of rock shafts 362. The rock shafts 862 are journaled in bearings in the brackets and are connected at points adjacent the rocker arms 360 by inter-meshing gear segments 864; One of the rocker arms 860 has formed integrally therewith a second arm 366 and is provided at its fin-ward end with a bolt 368 that extends through a. segmental slot 370 in a portion of the adjacent bracket 334'. and a clamping head 37? is provided which is adapted to be tightened against the side of the bracket to hold the angle bars in their adjusted positions. By turning the head 372 and raising or lowering the bolt 368 in the slot 370. the angle bars 380 may be conveniently adjusted by a single operation. It will be obser ed that the lateral edge guides 826 which are formed as integral parts of the angle bars 330 will also be adjusted at the same time.

When the supply of lifts on the feed table has become exhausted. or if for any reason a lift becomes stuck in the machine. it is desirable to interrupt the normal operation of the machine. In the construction shown. means is provided which is crmtroll-ed by the passage of the lifts through the machine so that when the machine is operating properly and the lifts are traveling through the machine in the desired manner. the machine is maintained in operation. but upon the failure of the machine to deliver a lift to the magazine 40 at a predetermined point in each cycle of operations, the stop mechanism 42 is employed to throw off the power and stop the machine.

As shown in Figs. 1 to I") inclusive. :1 bolt shifter 376 is provided for shifting the belt into and out of operative engagement. with the fast pulley 50. hen the lTHUlllllO is in operation the belt of course is on the fast pulley and the belt shifter is in the position in which it appears in Figs. 2 and The belt shifter is pivoted upon the frame at the rear of the machine and is connected by a link 378 with a shipper lever 3.80 which is pivoted on the frame at the front of the machine. The link 378 is acted upon by a. spring 382 tending to throw the belt shifter in a direction to shift the belt onto the loose pulley but the spring is normally prevented from actuating the belt shifter by the engagement of a dog 384 that is pivoted at 886 on the link 378, with a latch 388 that is pivoted at 390 on a crossbar 392 which so cured at its ends to the brackets 334-. A pair of stops 394 on the link 378 serve by engagement with the opposite sides of the adjacent frame standard 14: to prevent the belt from being shifted too far in either direction.

The dog 384 has an upstanding arm 396 which is connected by a link 398 and a spring 400 with the shipper lever 380, a pin 402 on the shipper lever being received in a longitudinal slot 404 in the link 3.78. The spring 400 normally holds the dog 384 in position to engage the latch 388, the link 398 serving to hold the dog in operative position against the action of the spring 400, as shown in Fig. 5.

The latch 388 is adapted to be actuated by a rod 406 which is supported in suitable guideways in the brackets 334 for longitudinal sliding movement in a horizontal plane. To this end an arm 408 extends upwardly from the latch 388 and is held by a light spring 409 against a pin 410 projecting laterally from the rod 406, while a stronger spring 412 acts upon the rod in a direction tending to cause the pin 410 to disengage the latch 388 from the dog 384, so as to cause the belt to be transferred from the fast to the loose pulley and thus stop the machine. Normally the rod 406 is held against sliding movement under the influence of the spring 412 by the upper arm of a cam lever 414 which is fulcrumed on the rod 54. The lower end of the cam lever 414 carries a. cam roll 416 which rides against the cam 418 fast on the cam shaft 48, a spring 420 acting upon the lever to hold the roll against the cam. The cam 418 is so designed that it holds the upper arm of the cam lever 414 in the position indicated in Fig. 4 so as to permit the latch 388 to be engaged by the dog 384 during the greater part of the revolution of the cam shaft 48 which produces one cycle of operations of the machine. There is, however, a short lowspot in the cam 418, as shown in Fig. 1, which permits the rod 406 to swing the cam lever 414 toward the right in Fig. 4 until the latch 388 is disengaged from the dog 384 thus stopping the operation of the machine. But normally another means becomes effective at this point to restrain the rod 406 and this means is controlled by the movement of one of the retaining pawls 352. The rod 406 has a notch 422 out into it at such a point that when the rod is in the position at which it appears in Figs. 1 and 4, the notch lies in the path of a dog 424 pivoted on a stud 426 that is supported at its opposite ends in lugs projecting from one of the brackets 334. A spring 428 acts upon the dog 424 in a direction tending to hold it out of the notch 422, in the position shown in Fig. 4, this position being determined by the engagement of a lug 430 on the dog with a stop 432 on the bracket 334.

In order that the dog 424 may be actuated by the movement of one of the retaining pawls 352, the dog'424 is provided with an elongated hub from which two arms 434 extend upwardly adjacent the outer sides of the rock shafts 362, and these arms are connected above the rock shaft by a bar 436. The bar 436 is engaged by a downwardly projecting pin 438 (F 4 and 8) at the end of a rocker arm 440 that is pivoted to a bracket on the outer side of one of the angle bars 330, and this rocker arm is connected by a link 442 with a similar arm 444 secured to the bottom of the stud 353 of one of the retaining pawls 352. By means of the bar 436 the dog 424 is operatively connected with the retaining pawl 352 irre spective of the adjustment of the angle bars 330. It will be evident that the spring 428 will serve to maintain in operative position the retaining pawl 352 by means of which the dog is operated so that no additional spring is required for the purpose.

It will now be evident that each time a skived lift is properly delivered by the stacking blade 38 to the magazine 40 the retaining pawls 352 will be rocked as the lift passes by them and through the connections thus described between one of the pawls and the dog 424 the dog will be pressed into the notch 422 in the rod 406 where it prevents the rod from moving longitudinally under the influence of the spring 412. This operation takes place at that point in the cycle of operations of the machine in which the roll carried by the lever 414 is passing over the lower spot in the cam 418. If for any reason the retaining pawl 352 is not rocked at this point in the cycle, the dog 424 will be held out of the notch 422 and the rod 406 will-be pushed toward the right in Fig. 4 by the spring 412 tripping the latch 388 and allowing the spring 382 to throw the belt shifter 376 far enough to transfer the belt onto the loose pulley and stop the machine. After the difliculty which causes the stopping of the machine has been remedied, the shipper lever 380 is pulled forwardly by hand, the pin and slot connection between the link 398 and the shipper lever permitting the dog 384 to pass beneath the latch 388 and reassume its normal position in front of the latch. The rotation of the cam 418 produced by the application of power to the machine again will operate through the cam lever 414 to turn the belt shifter 37 6 into position to hold the belt upon the fast pulley. It will thus be evident that the lift retaining pawl 352 which is operatively connected with the dog 424 serves not only as the purpose of a pawl operated to support the end lift in the magazine 4.0 but also performs the functions of a feeler since it feels for the lifts entering the magazine and allows the trip mechanism to operate or prevents it from operating, depending upon whether or not it is engaged by a lift at the proper time. The pin and slot connection between the link 378 and the shipper lever 380 permits the manual shifting of the belt by allowing the initial movement of the shipper lever to act through the link 378 to disengage the dog 38a from the latch 388.

The operation of the machine has been explained so completely in connection with the description given above of the construction and arrangement of the various parts that any further description of operation is believed to be unnecessary.

While the invention has been herein disclosed as embodied in a mechanism designed to skive or even heel lifts, it is of course obvious that the invention is not limited in its application to this operation, nor to the details of construction and operation herein disclosed, nor to the conjoint use of all of its features, but that the various features of the invention may be embodied either separately or collectively in various forms without departin" from the real scope of the invention.

Having thus described the invention, what is claimed as new is 1. A machine for operating upon blanks of sheet material having, in combination, a support for a stack ofblanks, intermittently actuated means for yieldingly feeding the stack across the support, means for periodieally withdrawing a blank from the advance end of the stack in the direction of feed, a skiving knife, and means for forcing each blank withdrawn from the stack against the knife.

2. A machine for operating upon blanks of sheet material having, in combination, means for supporting a stack of blanks, a picker adapted to be advanced to grasp the blanks successively and to be retracted to withdraw the blanks from the end of the stack, means for stripping the blanks from the picker as the latter is retracted, a skiving knife, and means for forcing the blanks against the knife after they have been withdrawn from the stack.

3. A machine for operating upon blanks of sheet material having, in combination, means for supporting a stack of blanks, a skiving knife, feed rolls below the stack for feeding blanks successively to the skiving knife, means for periodically withdrawing a blank from the stack and releasing it to permit it to fall edgewise toward the feed rolls, and means for insuring the introduction of the blank between the feed rolls.

at. A machine for operating upon blanks of sheet material having, in combination, a support for a stack of blanks, a skiving knife,'a pair of feed rolls below the stack for feeding blanks to the skiving knife, means for periodically withdrawing a blank from the stack and releasing it at a point above the feed rolls to permit it to fall against said rolls, a pusher for introducing the leading edges of the blanks between the feed rolls, and means for varying the path of the working stroke of the pusher to insure that blanks of different sizes will be grasped by the feed rolls.

5. A machine for operating upon blanks of sheet material having, in con'ibination, a support for a stack of blanks, means for withdrawing a blank from the stack, a skiving knife, a pair of feed rolls for feed ing blanks to the skiving knife, and an oscillatory arm for pushing the blank with drawn from the stack toward the feed rolls until the leading edge of the blank is grasped thereby, said arm being mounted with provision for adjusting its center of oscillation to shift its working stroke so as to insure that blanks of different sizes will be grasped by the feed rolls.

6. A machine for operating upon blanks of sheet material having, in combination, a support for the lower edges of a stack of vertically disposed blanks, a picker for withdrawing horizontally the endmost blank from the stack, a skiving knife, a pair of feed rolls for feeding the blanks to the skiving knife, a pusher for engaging the upper edge of the blank withdrawn from the stack and pushing it to present its lower edge to the feed rolls, and means for causing the working stroke of the pusher to be shifted relatively to the support to insure that blanks of different sizes will be grasped by the feed rolls.

7. A machine for operating upon blanks of sheet material having, in combination, a support for a horizontal stack of blanks, means for intermittently feeding the stack across the support, means for clamping the edges of the blanks near the forward end of the stack between successive feed movements of the stack, a picker for successively withdrawing the endmost blanks from the stack in the direction of feed, skiving mechanism, and a pusher movable across the forward end of the stack for engaging the blanks thus withdrawn from the stack and introducing them edgewise to the skiving mechanism, one side of the pusher being adapted to provide lateral support for the blank at the forward end of the stack when released by said clamping means.

8. A machine for operating upon blanks of sheet material having, in combination, a support for a horizontal stack of heel lifts arranged with their breast edges downward, means for Withdrawing a lift from the stack in a direction perpendicular to the plane of its exposed face, a skiving knife, a pair of horizontal feed rolls for feeding the blanks to the knife, and a pusher for engaging the rear edge of each lift withdrawn from the stack and introducing it breast edge foremost to the feed rolls, the pusher having a plurality of pointed arms for engaging the edge of the lift to prevent the lift from turning in its own plane while being acted upon by the pusher.

9. A machine for operating upon blanks of sheet material having, in combination, means for supporting and advancing a stack of blanks, a picker for periodically withdrawing the endmost blank from the stack in a direction perpendicular to the plane of the exposed face thereof, and a stop member disposed at the end of the stack and arranged for rectilinear movement toward and away from the end of the stack to limit the advance of the stack and permit the withdrawal of the endmost blank therefrom by the picker.

10. A machine for operating upon blanks of sheet material having, in combination, a support for a stack of blanks, a picker for removing blanks singly from the end of the stack, means for periodically forcing the picker against the end of the stack to seize the end blank, means for preventing retrograde movement of said end blank under the influence of the picker, means for yieldingly advancing the stack between successive operations of the picker, and a stop alternately moved into position to limit each feed D'IOVQ- ment of the stack, and withdrawn in the direction of feed to permit the removal of the end piece thereof.

11. A heel-lift skiving machine having, in combination, a feed table for supporting a horizontal stack of lifts, means for intermittently feeding the stack across the support, a stop alternately advanced toward the end of the stack to limit the feed movements thereof and withdrawn to permit the removal of the end lift from the stack, a picker for removing said lift, a skiving knife, a pair of feed rolls for feeding the lift thus removed to the knife, a pusher for advancing the lift to the feed rolls, apd a magazine for receiving the skived lifts.

12. A machine for operating on blanks of sheet material having, in combination, a support for a horizontal stack of blanks, means for intermittently feeding the stack across the support, an annular stop member alternately advanced toward the end of the stack to limit the feed movements thereof and Withdrawn to permit the removal of the end blank from the stack, a picker movable through the stop member for withdrawing said blank, skiving mechanism, and means for transferring the blank to the skiving mechanism.

13. A machine for operating upon blanks of sheet material having, in combination, a feed table for supporting the lower edges of a stack of blanks arranged in face-to-face relationship, a stop member alternately advanced toward the end of the stack and withdrawn to permit the removal of the end blank from the stack, means for intermittently feeding the stack across the feed table to advance the end blank against said stop, a picker for removing said blank, means for clamping a plurality of the blanks in the stack adjacent said end blank to support them during the removal of the latter, skiving mechanism, and a pusher arranged to transfer the blank edgewise to the skiving mechanism and provide lateral support for the blank remaining at the end of the stack when released by said clamping means.

14L. In a machine for operating upon blanks of sheet material a support for a stack of blanks, means for advancing the stack on said support, a picker which is advanced and rotated to seize tie endmost blank in the stack and then withdrawn and rotated in the opposite direction to remove the blank from the stack and release it from the picker, and a stop member movable into engagement with the end blank in the stack to limit the advance of the stack and adapted to be withdrawn concurrently with. the picker, said member having a roughened blank engaging surface for preventing the rotative movement of the picker in releasing the blank from being imparted. to: the blank.

15. A machine for operating upon blanks of sheet material having, in combination, skiving mechanism, means for feeding blanks singly to the skiving mechanism, a magazine in which the skived blanks are received, a stacking device for moving each blank into stacked relation with the remaining blanks in the magazine, and mechanism controlled by an interruption of the stacking of blanks in the magazine for stopping the machine.

16. A heel-lift skiving machine having, in combination, means for supporting a stack of vertically disposed lifts, mechanism for skiving the lifts while vertically disposed, means for withdrawing the lifts flatwise from the stack and presenting them vertically to the skiving mechanism, and means for stacking the skived lifts without moving them materially out of a vertical plane. L

17 A machine of the class described having, in combination, a support for a stack of blanks, a skiving knife, means for feeding a blank to the knife, a picker for withdrawing the endmost blank from the stack in a direction substantially perpendicular to the plane of its exposed face, and a pusher for moving the blank from the picker to the mechanism for feeding it to the knife.

18. A machine of the class described having, in combination, a support for a stack of blanks, means for moving the stack intermittently along the support, a picker for withdrawing blanks one by one from one end of the stack in the direction of movement of the stack, skiving mechanism, and a pusher for transferring the blanks as they are separated from the stack by the picker to the skiving mechanism.

19. A machine of the class described having, in combination, a support for a stack of blanks, means for moving the stack intermittently along the support, a picker for withdrawing blanks one by one from one end of the stack in the direction of move ment of the stack, skiving n'iechanisnl. a 10 means, the picker, the pusher and the shiv- 15 ing mechanism from said shaft.

ERASTUS E. \VINKL E Y.

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