US1378162A - Cloth-cutting machine - Google Patents

Description

M. ZAWISTOWSKI. cum: cun ms MACHINE. APPLICATION FILE-D AUG. 7, 1919.

3 SNEETSSHEET-L WITNESS I mum r01? A TTOHIVE Y M. ZAWISTOWSKI.

CLOTH CUTTING MACHINE. APPLICATION FILED AUG-7,19.

Patented May 17,1921

3 SHEEYTSAHEET WIT/V588 "M "Wm/r01? 1145212712 Z raw 'siaws/u' 7 T' H' iM/ M A TTOR/VEY M. ZAWISTOWSKI. CLOTH cunm's MACHINE. APPLICATICN FIVLED AUG. 7.4919.

Patented May 17, 1921.

3 SHEETS-SHEET A NOR/YE) UNITED SiTATESI -M'A R'rIN ZAWISTOWSKI, or BROOKLYN, YORK.

oLotrn-on'rrme MACHINE...

T 0 all wh'om'it mag/concern)? Be it known that .I,' MART1N ZAWISTOWSKI, a citizenof the UnitedStates, and aresident of, Brooklyn, in thev county of 'Kings and State of New York, have invented certain new and usefullmprovements in Cloth-Cutting Machines, of which the following is a specification. l

. This inventionisan improvement in cloth cuttingmachines of the, motor driven recipe rocating knife type.

frequent sharpening of the. knife which is usually done by the use of an emery stick.

Such machines require A great deal of time is saved if thissharpening. can be done while the knife is in the machine but it is necessary to move the guard away from its normal position before this can be done. The guardordinarily carries the presser foot which is adjusted vertically in accordance to the thickness of, the mate- I rialbeing cut and a saving of time is effected if the presser foot. can be returned to position after sharpening without necessitating readjustment. It is also frequently necessary to remove theknife and insert a new one, and inspect, clean, adjust, or oil the knife operating mechanism.-'

In my improvedconstruction I provide a cover. plate for the knife ope-rating'mechanism which may be readily moved to operative or inoperative position without necessitating the uselof anytools. There is also provided a knife guard and presser foot adj ustably secured to this cover plate so that both maybe movedto inoperative position with the cover plateand the, knife edge as well as the driving connections exposed for cleaning, oiling," adjusting, or sharpening operation. constructed'that when inoperative position itengageswith the material at both sides of the cutting, edge but when moved to inoperative position,travels ina direction at.

right angles tothe plane of the knife and to a point spaced al-considerable distance from said plane so as not to interfere in any way with the use of the emery stick or other knife sharpening apparatus. In my improved construction, the vcoverplate Which carriesthe guardandpresser foot is mount- :ed to swing about an axis preferably 00- incident with the ax swof the rotary driving a membe of the knife an the P s r My improved presser foot is so itself isformed of two 'pivot'ally connected sect ons, one s of which may be swung outwardly and forwardly in re'specttothe other Specification ofLett'ers Patent. Patented 192 1." IApplication filed au ust 7,,1e19.. Serial ma a;

so thatth'e presser. foot as a 'wholemay move 7 laterally during. the pivoted or swinging movement of the .cover plate about its horizontal axis. i

knife is substantially unobstructed- This,

. V As a further importantfeature, I mount, Q the motor and the axis of therotary driving.

7 member for the knife slightly tothe rightof also permits the power of the motor to be i applied more effectively during the. downstrokeoftheknife when the main cutting operation takes place. My invention in volves j various, other important features which willbe referred; to more particularly in connection with the following detailed description, of one form which my invention may assum'e,.and whichris illustratedinthe accompanying drawings.v 1 In these drawings z V Figure 1 is; a. side elevation.

Fig. 2 is a front elevation. 1

Fig. 3 is a View similar wing; 2 but with the cover plate, guardhandpresser foot re-.-

moved, and indicated in dottedlines'in inoperative position.

Fig. 4 is a homo tal .sectionshowing the presser foot iniplan, said section being taken on theline 41-4 of Fig.5..

. Fig. 5 is a .centrali longitudinal seama 5f i the base.

, Fig. '6 is a perspective view of 'theinner" side of the'upperpartof the cover plate.

' f Figs. 7 and 8 are perspective vieWsi-of the presser foot, shown in' open andjcloseid.posi

tions, and

' Fig. 9 is a perspective view of'the v throat "plate. k p

The machinein oommon withothersoff the same generaltype includes-a base 10-adapted to *be moved along the table. 'beneathzthe goods to'be out, a'standard ll-rigidly sup- 7 i ported thereby, an electric motor 12,.moun'ted allel to the knife, a presser foot'-15,"canrie d by the knife guard, anda handle 16for proon the standard, a reciprocatory knife driven, by the motor andguided by the standard 13, a knife guard, 14 disposed substantially .par-

P e nd, end g aha. Wh e fflan'ge 24to which the connecting rod is se-. cured and which engages with an adjustable shaft is a'crank disk, 19 having mounted thereon a pitman or connecting rod 20.. The upper end of the knife 13 is bolted or otherwise rigidly secured to'alug 21 carried by a .slide 22 to which the pitman or connecting rod 20is pivotally secured. The slide 22 is mounted for direct vertical movement'in' a direction parallel to the plane of the knife I g g example, I have shown the cover plate pro- 7 vi ded with a slotted Projection 38 receiving and is held' against rotation, turning, or lateralmovement. 'As shown, the motor casing has a stationary guide rod 23 encircled by the slide and acting as a guide for the latter and the slide has a laterally extending l guide member 25. The engaging surface of the flange 24 of the slide and the guide member 25 is suchas to hold the slide against any tendency to rotary motion about the guide .rod 23. For instance, the guide member 25 may have'a V-groove receiving. a chamfered edge on thefiange 24. The guide member is secured to the casing by a pair ofscrews 26 V mounted in slots or made with suflicient free play to permit of a very slight adjustment toward and from the slide, such' adjustment "being secured by adjusting screws 27 projectgrooves thereof to receive screws 33 carried by the flange 29 of the casing. These hold the cover ing laterally through ajflange 28 on the g- 4 1 a '5. 1 j

The casing has an annular flange 29 encircling the crank disk and spaced therefrom and to this flange is secured the cover plate 30. The cover plate has ,an-inwardly extend- "ing cylindrical flange 31 as shown particularly in Fig. 6, and this flange has slots or 32 extending circumferentially plate in position but at the same time permitalimited swinging movement of the cover plate'about the center of the casing flange 29 V which is the axis ofrthe driving member 39.

The flange 31 of the cover plate also has a I pair of sockets or recesses 34 adapted to receive a spring pressed ball 35 carried by the "casing flange 29. This ball and its spring may be retained in a housin cap 36 screwed into the casinglfiange and t e sockets or re cesses 34 should be so positioned that the ball will enter one whenthe cover plate is o in operative'position as shown in Fig. 3 and will enter the other when the cover plate is moved laterally to the dotted line position in dicated in Fig. 3. Thus the cover plate will be automatically locked in either normal p0- sitionor-in the d splaced position exposing the mechanism and knifeedge. For sha pening a knife, inserting a new one, or oiling that it closely fits the lower or extending portion of the casing inclosing the driving parts and the lower portion 37 of its front wall lies in the plane in advance of the cutting edge of the knife.

Adjustably secured to the cover plate is V the guard 14. This maybe of any" suitable characteran'd may be clamped'in position in any suitable manner. Merely as a suitable the substantially square rod 14 constituting the guard, andhave shown a set screw 39 for locking the guard rigidly to the cover plate. L It will of course be evident that any other suitable means may be employed for locking the two together and permitting of the vertical adjustment of the guard to the desired elevation in respect to the, thickness of the material being cut. j

, The guard at its lower end. carries the presser foot 15'. This is illustrated as comprising two sections 40 and 41, the former rigidly" secured to the guard and held against rotary orzl'ongitudinal'move- Inent." This rigid section has forwardly and rearwardly extending projections 42 and 43 presenting a curved undersurface for resting on'the goods and holding them down as the machine advances. tion 41 of the presser' foot has a rearwardly projecting finger 44 which when .in normal position lies substantially parallel to the finger portion 42 of the other presser'foot section but spaced therefrom The other secso as to receive the standard therebe- --as a projecting portion5O serving as a handle andby means of which thesection may be rotated about the axis of the guard and through approximately 90. The presser' foot when in operative position has the parts disposed as illustrated in Figs.

1,2, .4, and 7 and with the rearwardly extending fingers 42 and 44 engaging with the standard. llvhen it is desired to move the guard and presser foot laterally to expose the knife edge or the operating parts,

the presserfoot section 41 is rotated to the position indicated in Fig. 8 and in dotted lines in Figs. 3 and 4. This separates the finger members 42 and 44*and brings the 'tion of this threaded "lower end of the standard mayhlie substantially fl'ushwith r the upper surface of the base but the -latter outwardly and forwardly to a position-in front of the cutting edge of the knife so that the entire presser 'foot may swing laterally with the guard and cover plate. The spring ,49 when engaging with the fiat faces l8 fholds the parts of the 'presser 'foot together as shown in Fig.

and when engaging with the fi'at' faces 47 1 holds them jspaceda'part. By this'constru'clateral movement of the' guard and presser tion of presser fo'ot' itwill be noted that'the front' part-is preferably at a lower-elevation thanthe upper surface of the 'base'andcarries athroat plate 52 which is of veryihard material. Thisis substantially semi cylin- -drical as indicated particularly in Fig-9 and has a narrow slot 53 into which the lower'end of the knife'may enter Preferably the throat plate what from its-front edge so asto slightly elevate the goods at the'pointwhere the cutting operation takes'place. This throat plate may be secured in position in any suitable-manner as for instance,by screws 1 54' extending up into' it"from1-the' under I side as indicated in-Fig. 5. l i

Bymountingthe cover plate,

may

guard, and presser foot as above described, the knife be readily removed by unfastening it from the'lug 21. The knife may then be taken out of the guiding groove of the standard 11 without dropping it down out through the bottom of the base 10 as is necessary in most constructions now in use.

The placing'of the axis of the motor atthe righthand side of the plane of the' knife plate not only permits of a betterviewof the cut of the material directly in advance of thercutting edge but also permits'pf a better application of" the power of themotor.

noted that during the 'down'stroke' oi the connecting rod 20 and the 'knife,-thejc'onnecting rod is more nearly vertical than .(lming' the upstroke.

Thus the power "is more I directly' applied and with less lateral thrust on the guides 23 and 25. The greater lateralthrustduring the upstroke'is ofminor tive connections therebetweem a' casing havnection about the axis of said rotary driver-1: and away from'said knife.

re ciprocatory knife," a motor berfor said "driverhaving an annular flange telescoplng wlth "saidfirst mentioned flange,

slants upwardy-somep I reciprocatory knife, a motorcasing presenting anannular flange, a rotary driverenfor said driver having an, telescopingwith said firstmenti'oned flange,

, With the motor rotating clocki vise p from the position shown-in Fig. 3', it will be .551

depending portion rigid therewith covering said driver and said connections,and means for mounting said casingto permit rotation thereof about the center of'said circular por-- tionand thelateral swinging'of said depending portion away from said knife.

2. A cloth cutting-machine, having a -re-' ciprocatory knife, a rotary driver, operaing'rigidly connected portions covering said driver and connections, and means for mounting said casing to permit lateral swingingof' the portion covering said conv3. A cloth cutting machine,- including a "c in P s'enting "an annulanflange, a rotary driver encircled thereby; 'a' 'rotatable cover- Inem 19:0

' anda knifel guardjcarried by said cover and laterally mo'vable away ,froinsaidfllknife upon-the rotationof said cover.

i .95 v 4:." A 'cl'oth cutting machine, including a circled thereby, a rotatable cover member annular flange "1 00 means for automatically retaining" said cover plate inpredetermined' operative and inoperative positions, and a knife guard carried by said cover-and laterally movable away from said k nife' uponthe'rotationof v said cover. I 5. A cloth cutting machine, including a reciprocator knife, amotor casingpresenting an annul a in said flangeyoperative connections between said driver and' saidknife'ya cover member telescoping with said'flangeand having a depending portion covering" said driving "connections,land-means for permitt ng flmalted rotary movement of sald cover member abouttheaxisofsaid-driver but preventing movement axially thereof.

6, A cloth cutting machine, including-a i l 'reci'p rocatory knife,

a motor casingpreilzo sen-ting an annular-flange, a rotary driver within said-flange, operative connections be-- tween'said driver-and said knife, a cover member telescoping with said" flange and *having a depending portion-covering said driving connections, means forperrnitting limited rotary'movement of said cover memher about the axis ofsaiddriver but-pre- 1; venting movement" ax ally thereof, and a knife gua d-carried by. said cover member. 13 0 r flange, a rotary-driver with- 110 .7. A cloth cutting machine, includinga reciprocatory knife, a motorcasing presenting an annular flange, a rotary driver within said flange, operative connections between said driver, and. said knife, a cover member telescoping-with said flange and having a depending portion covering said driving connections, means .for permlttlng limited rotary movement of said cover member about the axis of said driver but preventing movement axially thereof, and a knife guard carried by said cover member and adjustable endwise in respect thereto.

8. A cloth cutting machine including; a

motor, having ahorizontal drive shaft, a

reciprocatory knife, driving connections between said shaft and saidknife, a cover member mounted to swing only in a plane normal to the planeof the knife and about a horizontal axis co-incident with the axis of said shaft, a knife guard carried by said cover member, and-a presser foot carried .by said Cguard and including two pivotally connecte sections normally disposed upon opposite sides of the knlfe.

9. A ,cloth cutting machine, including a reciprocatory knife, a knife guard extend-4 ing lengthwise thereof, means for. mounting said guard to permit lateral swinging ina plane normal to the plane of the knife'and on one side only thereof, and a presser foot having a pivoted member pivoted to swing into or out of operative position on the posite side of the plane of the knife. 1

10. A cloth cutting machine, including-a reciprocatory knife, a knife guard extending lengthwise thereof in front of the, cutting edge, a presser foot carried thereby including a member substantially rigid with said guard for. engagement on one'side of the plane of the knife and a second section pivoted to said guard for engagement at the opposite side of said knife, and means for mounting said guard to permit 'swingof the knife, and a presser foot section pivotally secured to the lowerendthereof and movable into a position substantially paralid to said knife on the opposite side of the plane thereof when said tive position. i I y 12. 7A cloth cutting machine, including a reciprocatory knife, a knife guard mounted guard is -'in opera to swing about a horizontal axis toward and from the plane of the knife, and a presser foot section carried .by said guard and ro-' tatable about anaxis substantially parallel "to and in front of the cutting edge and into or out of operative position alongside the knife, said presser foot section when. in operative position servingxto prevent the lateral swinging of said guard. g V 13. A cloth cutting machine, including a reciprocatory knife, a knife guard extending lengthwise thereof and in front of the cutting edge and mounted to swing in-one' direction only from normal position about 21.,15 horizontal axis and ma plane normal to the plane of the knife, and a pair of presser. foot sections carried thereby, one of said sections -being pivoted to swing about a verticalaxis in front of and substantially parallel to the :30

cutting edge from a normal position alongside the knife to a position in frontof the cutting edge to permit said swingingmovement of said guard.

14:. A cloth cutting machine, including an,5

electrlc motor having a substantially horizontal drive shaft, -a reciprocatory knife, driving connections between said knifenand said shaft, a cover member forsaid driv ing connections and mounted to swing only $10 in a plane at right angles to the plane of the knife toexpose said driving connections, a

knife guard carried by saidcover member, v and a presser foot having a pivotedsection normally locking said guard and cover .mem- .9 5

ber against said'swinging movement.

15. A- cloth cutting machine, having a reciprocatory slide, a knifesecured thereto, .a guide rod projecting through said slideand along which thelatter may'move, a flange; on said slide, aguide member engaging with said flange to prevent rotation of said slide about said rod, a drive shaft, and a pitman having eccentric connections to said shaft and pivoted to said flange. I 16. -A- cloth cutting machine, having areciprocatory a guide rod rojecting through said slide and along w ich the latter may move, a flange on said slide,

ing with said flange to prevent'rotation of i said slide about saidrod, a drive shaft hav- 3 ing its axis at one side of thefplane of said knife, and a pitman having eccentric connectlons to sand shaft and flange.

17. A cloth cuttingmachinefincludinga reciprocatory knife, a slidesecured thereto, a drive shaft rotatable about a horizontal axis at one side of the plane of the knife, a 120 pitman connected to said slide and having eccentric connections tosaid shaft, a knife guard, and a cover member for said slide and carrying said knife guard and rotatable about the axis of said shaft to bring said 125 i guard into and out of operative position in respect'to said knife and exposesaid slide. 18. A cloth cutting machine, including a reciprocatory knife, a presser foot including two membe s normally disposed upon oppo- 13O slide. a .knife securedthereto,

a guide member engagpivoted to said site sides of the plane of the knife and pivthe lateral movement thereof in a plane at otally connected about a vertical axis in right angles to the plane of the knife.

front of the cutting edge of the latter, Signed at New York city, in the county of 10 whereby one section may be swung through New York, and State of New York, this 4th substantially 90 to a position in front of day ofAugust A. D. 1919.,

the edge of the knife, and means for sup- I porting said presser foot and permitting of MARTIN ZAWIS-TOWSKI.

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