US1445718A - Machine for operating on sheet material - Google Patents

Description

P@h.2@,1l'923. 44,71

M. ROSS MACHINE FOR OPERATING 0N SHEET MATERIAL Filed Feb.12s,'1921 jAheets-sheet 1 ATTORNEYS H. M. Ross MACHINE FOR OPERATING ON SHEET MATERIAL lFelb. EH, 1923.

Filed Feb. 25, 1921' ,4 sheets-shee t 2 ATTORNEYS :Fhf, 23,

H. M. IRQSS l MACHINE FOR OPERATING ON SHEET MATERIAL Feb w, 1923'. 7'

H. M. ROSS MACH-IN}? FOR OPERATING 0N SHEET MATERIAL Fl-led Feb. 25, 1921 4 sheets-sheet i 7 "ii-iiifttn siit'intt' tj illii HUGHIM', totem oonnevnn, new oninlnssienon gto enieinnen ltLACHINE Wonists, nc}, OFBROQKLYN, nnwirome A, CORPORATIONOF new YORK. 1

UIVLAGHINE FOR iOPERATING ens inn ij fil efnnien.

that I, Hnenlil Ross, a

citizen; of the; United States; residing et E lVoedlmven in the county of Queens and State of New York, have invented new and useful In;in'roveinents in li lechines for (linen flsnch :i'nuchines an operation performing member, such as" i d e 01' punch 1s employed it dii iing the i in eting on Sheetlifateriel, of which thefol-f lOWlIlg' is a specification; My invention relates to machines forop eifzttingonslieet materiel, such as shown in the United Stetes petent \toQCelleson hie. n

'totpi'oduce cuts one after enother ln rows ]ii plicat'ihn filed nei iuaryeeiezi. semi nal new. i l

ztplzin, and v Fig. 8 an end elevation of e part of the sheet feeding means;

Fig. 9 is e detail fvieW of pert of the inechzn'iisni teken on line 9- 9 of Fig, 1;

l 1 Fig. 10 is ztlvieiv partlyin side elevation endv pzu tly in 1 section showing operating mechanism for the upper dieoi". punch and Ifoi the plunger of a pump for su pi y e' Fig; ll enel lowinggthe sheet to-be shifted transversely t :At the: hacleofthe bed of the frame 6 is so es to stand ithin the effective reach of of cuts. The successive rows ei'efsterted from opposite edges of-the sheet so that rection row of icuts is' producedl Lillie prineipal object: of this invention is to provide foi machinesofthis or other suit- :ihle che 'acter', iinpi'oi ed, means for 1Ji3fOCl'llC- :1 relative shifting o1 feeding movement khctn een the sheet and the die. Other oh-r i features and advantages iny invenill eppezir inoi'ef lly inthe following detailed description and appendedclaims. accompanying drawings forming a pertof this 's )i;3(;ilic:;ttio11 illustrate a inn-chine tr'ontaining one tiIilliQClili'iGl'lh of the inven: Qtiio llnthe drawings, v

1' is a side elevation the mechi ne; 2 islefrontelevetion thereof pl an iew illustrating the table i a slieet is supported hile being upon end parts of the die mechesin; se tling" means and means foi conling; the lateral movement of the sheet. f "lite-M4 a cross *ection shoiving the sheet simnort.

l euhstzinti feeding movement in Qeechidiis t1, transverse sectional iew taken ellyl ceiitnilly of the the mechanism fiend eho i hjig ii'ifiiddition tosuchmechanism the let tion of the letei'elu'no feed]ng neans.

vement of the sheet I; The base ct of then iechine ca i'ifies 2L frame Z) n hichis tilted at a suitable angle to the Vertical. In this frame is journeled the main driving shaft 0 which maybe driven bye suitable means such as the pulley ('ZQ arranged thelower member j (Figs. and 4) ofthe d eoi' punch mechanism, tl1e up-.

l, per member 7: of whichifliigr l)v is carried hy the plunger [guided in suitable ways in the frame 7) and actuated from a crank m it on the shaft chy thepitmen n. [The frame :7 is provided with the sheet suppoijt 01" table 01 itteach. side of the die or punching Iinechzn isni there is secured to the frame e t me ket t, these brackets :being reverse noun; iipzii'ts of each other. Referring to it; WHlTlly opening month or space 4) adapted to receive the rear edge portion of the sheet to he opeietedupon. For limiting the; reelelft direction; relatively to the die, straight" ed gee at are employed, each of these straight edges, asshown helng fomned of a strip of evzition on 5L larger scale of angle iron against oneflenge of Which the reef edge of the sheet is ede pted to bezn'. When a sheet is 1ntroduced into the ma- ,chineywith its rear edge in COIltilCh with {the ii hich ris made to and l to; feed it len t e reciprocating (lie or punch nieiiii i; l leferi. 1;: more pgnrtmulerly to igs 5 28 this cit i'l'ie coinpiisese rack lit-11x4; heving sque 'e cut teeth. 5 along its front edge and e squzn'e recess 6 near each end thereof edges, itisjreceived bye d iej gr 'ip 1t and hold it lfi inly in its rear edge. Each recess 6 receives a square stud S projecting downwardly from a forked bracket 9 and affording a support for the spaced plates 10 and 11. The said brackets 9 are formed with tables 12, and above the table each is forked in plan (see Fig. 7) so as to receive the pivoted presser or gripper 13', the table and presser having a. mating projection and recess '14. Each presser or jaw is normally pressed towards the dotted line or inoperative position shown in Fig. 8 by a spring 15 and is forced into gripping relation to the table 12 so as to indent and grip the interposed sheet by the shaft 17 To this end the shaft 17 is provided with recesses 17 (Fig. 8) and each rpreeser is provided with a roller 17 which engages the periphery of the shaft and is adapted to pass into the corresponding rc cess 17 when'this is brought opposite the roller. Presseror gripper 18 is desirably made adjustable to take care of different thicknesses ofmetal. The adjustment, as shown, is accomplished by forming the presser with a lower portion 18 which is yieldably connected to the body of the presser by slotting the presser, the lower portion being held in adjusted position with respect to the body oflthe presser by suitable means, such as a-serew 13".

The rack i is arranged to travel in the rabbet 19 (Fig. 4) at the back of the table 0, icing held thereinby the longitudinal rib longitudinally with respect to the table 0 For effecting the movement of the carrier I haveprovided means drivenfrom the main shaft 0, whereby the power of the machine is employed to shift the carrier. The means shown include an air pump, the cylinder 20 of which is fixedly secured on the top of the frame 5 as shown in Figs. 1 and 2. The piston or plunger of the pump is connected by means of a pitman 21 with the crank m, the

*pitman 21. being desirably pivotally connected to extensions: m of the p tman n.

vReferring to Fig. 1, the air compressed by the pump is delivered through a suitable connection 22 to reservoir 23, which serves to maintain a supply of air and to deliver the "air under a substantially constant pressure. From the reservoir, the air is delivered through a connection 24 and a connection 25 or 26 to one end or the other of a cylinder Q'T-snpported by the frame Y) under the table 0 (see Figs. 2 and I A. valve 28 controls the supply of compressed air fromthe connection 24 so as to enable it to be delivered either into the connection 25 or the connection 26 to thereby permit the air to be delivered on either side of thepiston 29 in the cylinder 27. This valve also controls the exhaust from the cylinder 21'. Referring to F ig. 11. the valve,

as shown, comprises a casing 28 in which the adjustment screw 28.

a valve member 28 is longitudinally movable. The latter member is provided with a peripheral groove or recess 28" which is adapted to register with one or the other of two ports 28 in the casing 2S when the said member is at the end of either of its strokes, the other of said ports 28 being then covered by the body of the said member. The compressed air conduit 2% communicates through an openini 28 in the casing 28 with the groove 28"; and each of the ports 28 communicates with one of the connections 25 and 26 leading to opposite ends of the cylinder 27. It will accordingly be seen that the fluid from the connection 21- will pass through the groove 28 to only one of the connections 2:), 26, depending upon the position (at the end of one stroke or the other) at which the valve is placed by the mechanism hereinafter described. To permit the exhaust of the air from the cylinder 27, the movable valve member 28" is provided with a longitudinal central bore 28 extending inwardly from one end of the said member and having transverse inlets 2S adapted to register with that one of the ports 28 which is shut off from communication with the air supply groove 28. Accordingly, while air is being supplied to one sideof the piston 29, the air from the other side of said piston is permitted to exhaust through the opening 28". In order to obtain the desired back pressure upon the exhaust to thereby cushion to the desired extent, the feeding movement of the sheet carrying means, an exhaust valve 28 is secured to the movable member 28, the exhaust 'alve having a movable member 28 which is normally pressed to closed position by a spring 28, the pressure of which is regulated by The exhausting arr moves the valve 28 against the pressure of the spring 28 and passes into the cup 28 which is provided with openings 28 to permit the escape of the air to the atmosphere. The desired back pressure is obtained by adjustment of the screw 2G. The valvc described above is not claimed per se in this application. To yicldingly hold the movable valve member in either of its operative positions I have provided the casing 28 with a spring pressed pin or detent 28", the

tapered inner end of which is adapted to engage in one or the other of the depressions 28 in the said movable valve member.

A. chain 80 passes from each end of the rack 4 over sprockets 31 and 32 supported by k W hen the piston 29 moveslongitudinally (Fig. e

tween them, such as the screw 30.

This connection also permits adjustment to the rack bar 41. is connected so as to move the rack bar adistance double the travel of the piston This amplification of travel 18 it due to the chain. connections, as will be readily understood. Both ends of the rack bar are. connectedto the piston rod in the same manner. v

I have provided mechanism whereby the valve 28 is automatically shifted to-reverse the movement of the piston 29 whenever the carrier for the sheetmaterialhas completed substantially a full stroke in one direction. Tothis end the shaft 17 of the carrier is provided at its ends with extensions 36 (see one of which 1s adapt- Figs. 2, 3, 6, T and 8) ed to en gage and shift arm 87 pivoted to the frame of, the machine at the end of each stroke of the carrier. The arms 37 at opposite sides of the machineare connected by a link 38 so as to be shiftablesimultaneously. Movement of the carrier at the end portion of one stroke effects the movement of. both arms 37 in one direction while the movement of the carrier on the succeeding stroke moves both arms 87 in the opposite direction,and so on. The arm 37 at the left hand side ofthe machine (referring to Figs l and 3) is connected by a link 39 (see Figs. 1, 2, and 9) to one arm of a bell crank lever to. The other arm of the leveriO is connected by a link 41 to apivoted arm4l2 (Figs. 1, 9 and 11) which is connected by a link 4L3 tolan arm 41 1 of the same. shape the arm 41-2 but arranged in the opposite direction. The arms 4-2 ands l are hingedly supported by two arms of an inverted T-shaped lever the other arm of which is the valve 28. j i j v .On the rod 4-5 which as described in the next paragraph, is moved up and down once during each rotation ofthe power shaft .0 is mounted an abutment 80. Near the end of each stroke of the carrier the levers 37 are shifted in one direction or the other thereby shifting thelink 39, lever 10, links 1-1 and 13 and arms 42min to bring the lower end of one of these arms into the path of the.

.abutment80 (seeFig. 11). The abutment then liftsthe said arm and shifts the lever and the movable valve member 28 thereby directing thesupply of compressed air to by the link 45 and engaging a cushioned engagement with connected to .ment with it.

one side of the piston and permitting the air on the opposite side of the piston to exhaust to the atmosphere. 1 The shifting of the valve thus automatically causes the direction of movement of the carrier tobe reversed.

Tlo permit adjustment of the stroke or extent of movement of the movable valve member 28", .theabutment 80 is adjustable on the link 45, The'adjustment, as shown, is effected by means of a screw 81 carried the lowersurface of the abutment. The screw 81 may be locked in place by suitable means such as the lock nut 82. The abutment is secured in adjusted position by suitable means such. as

bolts 88 passing through the abutment and throughlongitudinal slots 84 in the link 45.

The mechanism for moving the sheet carrier described above tends, under a continuous pneumatic pressure,to move the carrier continuously throughout acomplete stroke. In order to retain the sheet to permit the die mechanism to operate intermittently thereon and form the desired series of cuts during each stroke of the carrier, there is provided means for intermittently checking; or retaining the carrier.

frame so as tocooperate with the teeth 5 of rack 4E. {The pawl. is slotted to receive one arm of a bell crank lever 41 (which arm has the pawl by virtue of a spring pin 12 against which the arm directly bears on one side). The bell crank lever is fulcrumed on a shaft 8 and has its free arm connected by a link 43 with a lever 44; (see Fig. 1) fulcrumed in the frame 6. The lever-.4 1 is connected by link 4.5 witha lever 46, also pivoted in the frame Z) and carrying a. roller 47 bearing upon the cam 48 on the shaft c, the free end of the lever 4L6 being preferably shaped as ahandle 49. A spring 50 holds lever 44 in such position that the roller 47 or lever 46 normally presses against the cam. The pawl 10 normally retains the rack (and hence the carrier) against. advance; but on each rotation of the shaft 0 the forward end of lever 46 is momentarily depressed by the cam 48 and the pawl is withdrawn, releasing the rack but quickly returning into engage- Thus there is effected an intermittent advance of the sheet across the machine, the several increments of advance depending upon the distance between the teeth upon the rack.

For cutting; away the scrap upon the forming of a series or row of cuts at the back of the sheet, each bracket to is provided with a pivoted knife 51 (Figs. 1 and 2) having shearing coaction with a fixed knife 52. A spindle is pivoted to and projects upwa-rdly from the movable knife and around it is coiled a spring" at interposed between the top of the bracket u and nuts onthe Referring to Fig. 5, 11. pawl 40' 1s shdablymounted in the spindle and acting to hold the knife normally elevated. Means are provided whereby when the carrier is traveling in either direction the relatively remote sheet severing means is acting and the other is idle. The action of each severing means is intermittent, being effected from the plunger Z, so that each time the die mechanism operates to form a cut the. severing means operates to shear or cut away some of the scrap. A sliding dog 56 (Fig. 2) is movable in a groove in the front of each knite so as to be adapted to project from the end of the knife or recede into the same. 'When the dog projects from the knife it stands within the path] of movement of a foot 58 on the side of plunger Z, said foot therefore depressing the knife when the plunger descends. Each of the dogs is connected by a link 61 to the arm 37 on the same side of the machine. VJhen the arms 37 are shitted, as 'hereinhet'ore described, at the end of each stroke ot'thc. carrier, one ot the dogs 56 is accordingly retracted within its knite and the other is caused to project from its kniie so as to render one knife operative and the other inoperative, as desired.

In order to release the sheet material from the carrier at the'end 0t each stroke thereof to permit the sheet to fall back to its new position against the straight edger the frame is provided at opposite ends with sleeves 63 having cam slots G l (see Fig. 3), which slots are adapted to receive projections upon the ends '36 of the shaft 17 and by means of the inclined slot portions Gi to rotate said shaft and to release the pressers or grippers 13 at the desired time. The inclined portions 64 of the slot 6 L also serve,

through their coaction with the corresponding pins 65 to move the pressers or grippers 13 into or out of operative posit-ion with re spect to the sheet to be held. The pressers 'orgrippers are yieldingly held in operative position by means ot a spring prcsed pin 17 (see Fig. 6) carried by collar 17 which is secured to the shatt 17. The spring pressed pin 17 coacts with a depression 17 in one of the brackets 9 to yieldingly holc the grippers in operative position.

My invention also includes means for automatically arresting the lateral movement of the sheet carrying means when the entire uset'ul portion of the sheet has been operated upon. To this end a pawl (Figs. 6 and 7) is pivotally mounted. on one of the brackets 9. This pawl rests upon the sheet so long as a. portion of the sheet remains for further cutting by the die. lVhon, however,thetotal useful portion of the sheet has been operated upon, thev pawl '70 is free to drop into one of the notches 71 in the frame of the machine as soon as the sheet carrying means reaches the end of its movement in either direction. To lift the pawl 70 out of: the notch 71 to permit the placing of a new sheet in operative position in the machine, an. arm T2 is secured upon the shaft 17 so as to be rotatable therewith upon the movement of the handle 18. This arm engages a projection 73 upon the pawl 70 to lift the pawl. out oi the notch 71 when the shaft 17 is rotated in the direction to release the pressers 13. In order to prevent premature movement of the sheet carrying means after the pawl 70 is disengaged from the notch 71, the slot Si in each of the sleeves 63 is provided with a portion (34! extending from the inner end of the inclined portion Get" at the slot at rightangles to the axis oi the shatt 1?. When the latter is in position to cause the pawl 70 to be held elevated bf. the arm 72, the projection (35 on one cud ot the shaft 17 is arranged in the transverse portion Git" of the slot (3 thcrclrv preventing tecding movement oi the shaft and sheet carrying means. Alter the new sheet has been inserted, the handle is permitted to tall to again bring the projection ()5 into the inclined portion (Eelof slot (ii.

In operation, a sheet having been placed upon the table 0 so as to enter the gripping means of the carrier and to fall with its rear edge into contact with the straight edges 50 (the carrier being at one of its limits of movement) the operator starts the machine. The desired amount and pressure of air is maintained in. the reservoir by the pump 20. A relief valve 23 may be provided to prevent evcessive pressure in the reservoir. The valve 28 now in a position. to permit the passage of air from the reservoir to one side ot the piston 29 for causing the piston to move the 'arricr across the machine. At the very beginning of the movement of the carrier, the projection (35 is acted upon by the ram (3 to move the shaft 1'? to cam the grippers 1.3 against the sheet to firmly lock the sheet in the carrier. Controlled by the pawl 40 (Fig. 5) the carrier under the influence ot the pneumatic pressure in the cylimler 27 on one side oi: the piston moves intermittently across the machine so that each time after the die mechanism has operated to torm. a cut the carrier moves one step, that is, just aniliciently to bring the sheet into position tor forming the next cut. Assuming that the carrier is being advanrcd to the right in Fig. 2. the dog 56 ot the right hand knife 51 will be projecting into the path ol thev corresponding foot 59 on the plunger. s that each time the plunger descends :1 rut is formed by the right hand shearing means, a. complete sequence of such cuts resulting in the part of the sheet back of the shearing line being finally cut away. When the scrap has been entirely cleared away (the carrier now having reached its limit oi. movenumt in one direction) the sheet is automatically released and falls again with itshack edge plunger Z. The valve QS having alsO heen l reversed, as described f above, the air iscon lducted tothe opposite side of the piston and the carrier 15 moved in the opposited recttiomthe sheet being again automatically clamped in the earrierat thegheginning ot this movement. The operation of the die or punching mechanism and shearingmeans l ca i rier as it was upon the advance movement except that a different knife is in operation; andthe operation of thefmachineinay he continued automatically to cut successive ions of cuts with the die mechanism until fivhent thepawl drops into i one of the notches 71 andthe lateral movement otthe izfi rest'ed. i

one embodiment of my invent-ion I amiiot to be limited thereto, but thatniany IHOCli-j lications and changes may he made ithout departing from the spiritfofflniy invention and the scope of thevappendedflclaims; Having now described my invention; what of the UnitedStatesis:

'1. The combination of operation perform- ,ing means; 1 11' cans .iior holding the material 1 ,Iclaim anddesiretosecureby LettersPatent ,to be operatedupon, meanstenclinpgto m duce a continuous relative feeding" movement it positioning of successive portions of the material, means for preventing: such relative? movement; andeutomatie means for aler-v to operated upon, meanstending towproouee a continuous relative teed: 11g; movemeut in either oi' two opposite directions between said operation performing means and said holding means to permit operativepos said movement producing 'DilQtlillS the san e at the end otssuch movement in one, direction, andhmeans -,for: alternately preventing and permitting; such relative movement when said movement producing means isoperating in either direction.

,jto he' operatedupon,means te ulingz; to pro .isithe same on theireturn movement of the movement producing means to reverse the the; yc-intne sheet has been operated upon,

,slieet feeding nieans automatically all p i i a j i I ment when said movement producingv means Itisunderstood that While I have shown between said operation performing ineans and StIlCihOlCill'lg, means to permit operative operati v0 and operative to permit successive ing;- means ing neans, means for holding thematerial tive'fe r1 I w tionqperiorming means and said holding ine; of successive portions of the material Teach o'l'wsaid directions, mean controlling to 1 reverse 3, The combination of operation perform-q 1 ing means, means for holding the material;

Iduce 3a eontiminus. relativefeeding move;

ment-in either of JDWO opposite directions be tweet]; said operation performingmeans and in each of said directions, means controlling said movementproducing means toreverse the same automatically s em end of suchfl movement in L one direction, and automatic means :lor alternately preventing and: per

mitt-La such relative movement when said movement producing- ,means is operating 1n eitherdirection. H i V eh The C(imblllntlhn oi operation pertornr lngfineans, means for; holding tlie' naterlal to be operated upon, fluid operated means tending to produce a relative feed ng movement in either of two opposite directionsbesaid holding means, means controllingsaid tween said operation aert'orming means and same-automatically"after a predetermined extentof relativemovement1n one Erin-Matron,"

and automatic means "for alteriiately preis operating in either direction;

venting andpermittingsuch relative inove p 5; The combination oil? operation performingmeans, means :i or holding thematerial to hecperated upon, fluid operatedineans tendlng to produce a relative feeding move meat in a given direction between said oper- 1 ation performing ineaiis and said holding STlCCGSSiVG portioitis of thematerial, means preventing such relative movement, and automatic means for :ilternatelv TGTKlQllUg increi'nents oi" operation perfotuning means driven thereby,

means for holding the material tophe operated'upon, and means including a pump driven by ysai d; driv in g means for prod uci n g :a relativefeeding movement llietiveen said :means to permit operative positioning of said preventing means inoperative and operoperationperformingmeans and said hold- The con'ihination j :ttedupoi'ua 11 1) means for iroiiiuringi a relal'nn' movement between said operi means including a* pump driven by, said driving means, a cylinder having uidconnection withsaid pun'ip,-a1id a piston in cylinder mo vahle hv the "fluid and connected lrivingz; means, operation performing uieans dr ven thereby, 1

means? For holding the nuiterial to he open; i

to produce the relative feeding movement.

8; The combination of driving queens, epeintion performing means driven therehy, means for holding the material: to he operated uponfand means for producing a rela tive cieedingr iioveinent 'hetiveeu said opera- H I ftion performing means and saidfholdinpj 20, .-'tween saidoperation performing means and ing means, a cylinder having fluid connection with said pump, a piston in saidcylinder movable by the fluid, and a't-ravel increasing connection between the piston and Y the relatively movable part.

forming means, means for holding the material to be operated upon, and means for producing a relative feeding movement besaid holding means including a cylinder, a

piston therein and a flexible member having a connection with said piston permitting the taking upot' slack in said member.

11. The combinationof operation pertltornr ing means, means for holding the material to be operated upon, and means for producmg a relative feeding movement between said operation performing means and said holding means including a flexible member and means for taking up slack in said member.

'12. The' combination of operation performing means, means for holding the material to be operated upon, and means for producing a relative feeding movement in opposite directions between said operation performing means and said holding means including a cylinder, a piston therein, a flexible power transmitting member connected to said piston, and means for taking up slack in said flexible member.

13. The combination of operation performing means, means for holding the material to operated upon, fluid operated means tending to produce a continuous relative feeding movement between said operation performing means and said holding means to poi 'iitoperative positioning of successive portions of the material, means for preventing such relative movement; and automatic means for alternately rendering said neventingmeans inoperative and operative to permit successive increments of such. :lecd" mg movement.

14;. The combination of operation perlormmg means. IlllVlllg means therefor,

'n'i eans for holding the materia'l'to be operated upon. and means "for produc' a relative -feeding movement in opposite di rections between said operation performing means and said. holding means including a cylinder, a piston therein, a fluid pump driv- "en by said driving means, fluid connections from said pump leading to said cylinder on opposite sides of said piston, and valve means for said connections to control the direction of the aforesaid relative feeding movement.

15. The combination of operation performing means, means for holding the mate rial to be operated upon, fluid operated means tending to produce a continuous relative feeding movement in either of: two opposite directions between said operation performing means and said holding means to permit operative positioning of successive portions of the material in each of said directions, said-holding means including means for maintaining the material secured to said moving means during the relative feeding movement in each of said directions, means controlling said movement producing means to reverse the same at the end of such movement in one direction, and means for altcrnately preventing and permitting such relative movement when said movement producing means is ope 'ating in either direction.

l6. The combination of operation performing means. means for holding the material to be operated upon. and m ans for producing a relative feeding movement be- 'twccn said operation performing means and said holding means including a cyhnder, a piston therein. means tor supplying fluid to and exhausting the same from said cylinder on opposite sides of said piston, valve means controlling said fluid supplying means to cause fluid to be admitted alteri'iately on opposite sides of the piston. and to be exhausted from the side oi the piston opposite to that on which it is being admitted, and adjustal'ile means 'for controlling the pressure oi the exhaust.

U. The combination of operation periorminnmeans, means for holding the material to'be operated upon, means tending to produce a. continuous relative feeding movement between said operation performing means and said holding means, means preventing such relative movcmeut, and means for alternately rendering said preventing means inopentive and operative lo permit operation upon successive portions of the material, said means for producing l'ccding movement including a cylimlcr. a piston therein. fluid connections to said cylinder on opposite sides of said piston, and valve means tor said connections to control the direction oi the a'l oresa-iid relative movement.

1.9. The combinati m oi. operation porl'orming means. means f r holding lhc matcrial to be operated upon, means for producing a relative feeding movement in opposilc directions between said operation poi-torming means and said holding means including fluid connections, valve means for said connections, and means for operating said valve means to automatically open one connection lcn i and closethe other after a predetermined extent of said relative feeding movement,

said operating; means including a power driven operating member and means connected with said valve means and movable nto and out of the path of sa1d operating member.

19; The combination ft operation per- :lormiup; means, means for holding the mate rial to be operated upon, means for producing a relative feeding movement between said operation performing means and said saidpower driven member.

her.

QOQThe combination of operation performing meanspmeans for holding}; the mates s rial to be operated upon, means for producing a relative feeding movement in opposite directions between said operation performing means and said holding means including fluid connections, valve means for said connections, means for operating said valve means to automatically open one fluid connection and close theother after a predetermined extent oi. said relative feeding move 1 ment, said operating means including a power driven operating member, means connected with said valve means and movable intoand out of the path or? said (mounting niember, and means whereby the duration of engagement between said operating member and movable means may be varied to adjust the length of stroke of the valve.

21. The combination with a press having a reciprocating punch member and driving; means for said I2Q6111l')l,0f pneumatic means including," a pump driven by said driving, means forintermittently :lieeding a sheet of material relatively to said punch member to permit successive portions of the sheet to be brought into operative relat-ionto said memlllh'e combination with a press having a punch member and a prtman Irv said pitinan forintermittently iteediuu a sheet of material relatively to said puru'zh member to permit sheet to be l'ililllifllt into operative relation successive pm'tirmsoi the to said member.

5.43 lho combination of afitrmue, a sheet holdinp; carrier movablv supprufted by the frame and, including a rack, automatic means tending; continuously to move said carrier, and means coasting: with said rack for alternately checking: and releasing the carrier.

2 t. The combination of a tranic. a sheet lmldinn' carrier movabljv supported by the i'raulo and, including a rack, pneumatic means tending to move said carrier, and means coacting with said rack for alternately checkingand releasing the carrier.

The combination of a frame, sheet holding; carrier movably supportedthereby and including a rack, pneumatic means for moving the carrierin opposite directions, automatic means coactinp; with said rack for alternately checking; and releasing the carrierfand automatic means for reversing the action of said pneumatic means after the carrier has moved a predetermined extent in either directionw i l 26. The combination of a frame, a carrier movablv supported thereby and provided "with means for releasablv"securing a sheet said pneumatic means after the carrier has moved a predetermined extent in either direction,

The combination oi a frame, a carrier movabl v supported thereby and provided with means ror releasably securing a sheet to the same, fluid operated means for moving: the carrier in opposite directions, auto matic means for alternately checking and releasing the ca. f, and automatic means for releasing said seeuringmeans to permit movement of the sheet transversely to the movement of the carrier after the carrier has moved a predetermined extent in either direction. i

E28. llhe combination of a releasable sheet holding gripper, automatic means for movingthe gripper intooperative and inoperative positions, and means for yieldingly latchimr the gripper in operative position. 29. The combination of operation per- 'lormiru: n'leans, means for holding; the materiali to be operated upon, autmnatic means for producing: a relative feeding movement luztvvoen said operation perit'm'minp; means and said holding means, and automatic means dependent upon the amount of matorial unoperated upon in sa d holding means for arresting the relative feeding; movement.

to; e combination oi operation per-- tormii'zn means. means For holding the maiIPl'lzll to be operated upon, auton'iatlc n'ieans forming means, means for holding the material to be operated upon, automatic means for producing a relative feeding movement between said operation performing means and said holding means, and automatic means for arresting the relative feeding movement, including a. retaining member adapted to be held in inoperative position by the material and with respect to which the material is movable, and means for moving said retaining member to permit the placing of new material in position and "for simultaneously preventing the relative feed ing movement.

32. The combination of operation performing means, releasable means for holding; the material to be operated upon, automatic means for producing a relative feeding: movement in opposite directions between said operation performing means and said holding means, and automaticm-eans for arresting the relative feeding movement including a retaining member adapted to be held in inoperative position by the material and with respect to which the material is movable, and means for releasing said l1olding means and moving said retaining: member to permit the placing of new material in position and for simultaneously preventing the relative feeding movement.

33. The combii'iation of operating: per forming, means, means for holding, the material to be operated upon and means for producing a relative feeding movement between said operation performing means and said holding; means including a fluid operated member and a travel. increasing connection between said membe' and the relatively movable part.

The combination of ormratnv; per- HUGH M. RUSS.

@ertificate of Correction.

It is hereby certified that in Letters Patent No. 1,445,718, granted February 20, 1923, upon the application of Hugh M. Ross, of Woodhaven, New York, for an improvement in Machines for Operating on Sheet Material, an error appears in the printed specification requiring correction as follows: Page 7 line 88 claim 26, for the Word revising read reversing; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 20th day of March, A, 1)., 1923.

[SEAL] KARL FENNING,

Acting Commissioner of Patents:

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