US1559871A - Fabric-cutting machine - Google Patents

Description

Nov. 3 1925.

J. HEYMAN FABRIC CUTTING MACHINE Filed March 29, 1924 2 Sheets-Sheet 1 1,559,871 2 Sheeta4hut 2 J. HEYMA N FABRIC CUTTING MACHINE Filed larch 2s Nov. 3, 1925.

Patented Nov. 3, 1925.

UNITED STATES PATEN ()FFICE.

JOHN HEYIVIAN, OF NF-YN YORK, N. Y.

FABRIC-CUTTING MACHINE.

application filed March 29, 1824.. Serial No. 762,760.

Fabric-Cutting Machines, of which the fol lowing is a specification.

This invention relates to power driven fabric cutting machinesand has for its principal object ,to provide a machine, whereby a piece of fabric can be cut to strips of predetermined size and bias. I

Another object of this invention is to provide means for facilitating and simplifying the adjustment of the machine for different sizes to be cut.

Other objects will appear from the detailed description of my invention.

In the accompanying drawing, in which similar reference characters denote corre sponding parts, Fig. 1 is a top plan view of my fabrlccutting machine; Fig. 2 is a vertical longitudinal section on line 22 of Fig. 1 thereof; Fig. 8 is a vertical horizontal cross section on line 33 of Fig. 1 thereof; Fig. 4 is a similar section to that of Fig. 3 on line 44 of Fig. 1 and Fig. 5 is a perspective View of a detail.

1O denotes a base or table over which the fabric F is' adapted to be fed from apile resting on the floor or a suitable support. Extending across the base or table 10, is the fabric feeding mechanism 11 The latter comprises two superposed rollers, one being a continuously and uniformly driven roller 12, which is adapted to project slightly over the upper face of the base through a slot and the other .an idle roller 13, carried by rock arms 1e and adapted to be periodically brought into frictional engagement with said driven roller 12 and when. the fabric F is passed between saidrollers to feed the same. These rock arms are fixed to the ends of a crossspindle 14 suitably supported in bearings 14 fixed onthe base 10. The roller 12, which may be journalled in suitable bearings (not shown) is adapted to be driven through suitable transmission means from a power driven shaft .15 extending longitudinally near one side of the base 10. In the present embodiment, the shaft 15 carries a worm gear 16, which meshes with a worm 17 formed on the correspond ing end 12 of the roller 12, Extending transversely of the base and parallel to the roller 12', but in the plane of thedriving shaft 15, is a shaft 18 suitably supported in the base'10 and which is adapted tobe con-1 tinuously driven with uniform speed from the shaft 15 through bevel gears'19, 20 orv the like; Near the driven end of thisshaftj 18, I provide means for periodically actuating the rock arms 14 of the roller 13, whereby the latter will be brought into and out of engagement with'the roller 12, so'as to feed the fabric intermittently towards the cutting mechanism to be described. These means comprise a cylinder or drum 21 mounted on the shaft 18, so as to be adjustas ble longitudinally thereon'a-nd provided with a cam 22 actuating an arm 23 fixed on the spindle 14: of the rock arms 14 and projecting downwardly through a recess 10 in the base 10. A spring 24 fixed at one end to the base and at the other to the spindle 14'. has the tendency to normally swing the roller 13 into elevated or open position; The cam 22 extends throughout the length of the cylinder or drum 21 and gradually increases in width from one end toward the other. The drum 21 is so mounted on the shaft 18, that while it will revolve with the latter, it can be shifted in longitudinal direction thereon, so that the roller 25 carried by the lower end of the arm 23 may be brought into contact with a wider or narrower portion of'the cam 22 and'thereby vary the period of engagement of the two rollers 12, 13and conse quently the extent of the feed desired. At its outer end, the drum 21 is formed with an annular circumferentialv groove 21 in which is engaged a vertically extending forked lever26 fixed to the end of a rod 27 extending transversely of andbelow the case 10 and connected at its opposite end to a pin.28. The latter is'slidablyv guided in a cross slot 10 -of, the base and projects upwardly. through a graduated slotted plate 29 fixed to the base 10.- The upper end of the pin 28 carries a knob 30 formed with an index finger pointing toward the gradua-:. t-ions 29 of the plate. These graduations may denote in inches the adjustments desired for cutting the fabric in different widths.

In front of and at a suitable distance away from the feeding mechanism, -'I provide the cnttnwmechanism 31. The latter comprises a transversely.extending bar '32 formed with a stationary cutting jaw 33 and a vertically swinging cutting jaw 3i, both extending longitudinally of the bar. The movable jaw 34 is fulcrun'ied on a horizontal pivot borne in a bracket 36 projecting from the fulcrumed end-of the bar 32. This movable jaw has a bent tail extension 87, which projects downwardly through a recess 10 of the base 10, and carries at its free end a roller 38.

In order to enable the cutting on a bias, the cutting mechanism can be adjusted to differentangles relative to the direction of feed. To this end, the bar 32 is fulcrumed on a pin 39, which extends downwardly through a hole 10 of the base and is ro-. tatively borne ina bracket l0 fixed to the base. The bar '32, at its free end is providedwith a member A1, which slidably bears in a circularly curved guide groove 10 in the base having as center the pivot 39. This member may be in form of a headed screw bolt, which on the threaded portion, carries nut 42, whereby the bar 32 and the jaws 33 and 8i on being turned around the pivot. 89 along the curved guide groove 10 can be fixed in the desired position. -The pin 35. is continuously driven from the main shaft 15 through bevel gears 43,144 or the like and carries a cam disc 4&5 adapted to actuate the tail 37' through the medium of: therol1er 38 carried by itpand cooperating withsa-id cam i5. The latter is so shaped that'it will operate the movable jaw synchronously wi-th'the operation of the roller 25 by the cam. 22 and the periods between snccessive downward strokes of the movable jaw will be the same as the maximum period of feedoccasioned by the widest part of the 02111122. As a result thereof when the drum 21 is adjusted so that anarrower portion ofthe cam 22 in, range with the roller; the fabric will-be intermittently fed shorter distances. while the movable jawwvilldesceud andhcut at' the end ofeach maximum feeding; period. The opening or. upwardmovement-of the jaw 3i will be effected: automatically through spring 47' acting. on the jaw and suitably mounted on the pin.

4.8- denotesa member projecting ;I;'roi.n the free endof the bar; and adapted to slid-- ably engage the free end of the. movablejaw 34- and to tightly hold the latter close to the stationary jaw '49 denotes a. suitable support for the goods atthe rear of the cutting mechanism -;.to prevent 7 it. I from r sagging.

This support maybe in form ore plate ex tending acrossthe. base 110- and fulcrmned' atone -end,. as at 49! and suitably. connected to the bar 32 to swing withit in parallelism. when adjusting-"the cutting mechan-isn'i to cut onl'the bias'..-.

The mode of operation is as follows mittently raise and lower the idle roller 13 from and onto the goods and di.1ring the periods of engagement of the two rollers "12 and 13 the fabric will be fed; Themovable jaw 34: will be raised periodically by the cooperation. of the cam 4.5 and the roller'38, the periods between successive downward strokes 'correspondi n to the maximum periods of feed.

lVhen it is desired to cut on a bias, the

cutting mechanism is turned on the pin 39' and the cam disc i5 adjusted on thesaid pin 39, so that the relative position between the cam'portion and the roller iti remains unchanged. 1

Since various modifications may be'made in the device without departing from the principle of my invention, I do not wish to restrict myself to the details described and shown.

' That I claim is':' V

1. In a fabric cutting machine, a fabric feeding mechanism including afeedroller, a cam for oscillating said roller, .a cutting mechanism including a movable-jaw and '.a cam for oscillating said jaw, both said cams being in such relation to one another vthat.

the periods betweeirsuccessive cutting actions will correspond to the periodsof max-- imnm feed of the fabric; 1 4 j I 2. A fabric feeding mechanism including an oscillating feed roller and an adjust-v able cam member actuating said roller andcapable of varying the stroke of oscillation ofthelatter. .i -m A 3. A. fabric feeding mechanism, including anoscillating feed roller and 'a graduated adjustable cam member for actuating'said roller with varying strokes.

4:. A fabric feeding mechanism, including a continuously revolving feed roller, a -continuously oscillating roller cooperating therewith and an adjustable grz-i-duated cam member capable of I actuating said.:last named roller with varying strokes.

5. A. fabric feeding mechanism, including a feed roller; a rocking a-rm carrying said. roller and? a longitudinallygraduatedand displaceable cam member .actingronlsaid: arm and" capable of transmitting rocking rmovez. ment to. said arm with varying strokes. ...6. In a -fabrio cutting ri'nachine, .'.the...com bi-nation with aQsourCelof power, ofa' rfevolw ingrfeed roller, an idlefeed roller, a rocking member. carrying the latter? apgltaduated cam member acting upoirsald rocking v ber, both said first roller and cam being continuously driven from said source of power and said cam member being adjustable relative to said rocking member to vary the stroke of the latter.

7. In a fabric feeding mechanism, a feed roller, a rocking member carrying the latter, a continuously revolving adjustable body formed with a graduated cam portion acting on said rocking member, a slidable member engaging said body and carrying adjustment indicating means.

8. In a fabric cutting machine, a feeding mechanism comprising a continuously driven means and a periodically operating means to cooperate with the latter to feed the fabric, adjustable cam operated means for varying the feeding periods, a cutting mechanism having an automatically oscillated jaw and means for synchronizing the operation of said jaw with the feed of the fabric.

9. In a fabric cutting machine, a feeding mechanism comprising a continuously driven means and a periodically operating means adapted to cooperate with the latter to feed the fabric, adjustable cam operated means for varying the feeding periods, a circularly adjustable cutting mechanism having an oscillating jaw and means for includingv a continuously revolving adjust-' able cam and a member cooperating with the latter to transmit rocking movement to said second roller, a cutting mechanism including a vertically rocking cutting jaw and a cam for producing the rocking movement of said jaw, said two cams being in such relation that the periods between successive cutting actions will correspond to the periods of maximum feed of the fabric. Y

11. In a fabric cutting machine, a cutting mechanism comprising a horizontally pivoted member formed with a stationary aw, a second jaw pivoted to said member to swing vertically, a continuously driven cam adjustably mounted on the pivot of said JOHN HEYMAN.

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