US1160946A - Machine for trimming leather and other fabrics. - Google Patents

Description

J. H. NANGLE. MACHINE FOR TRIMMING LEATHER AND OTHER FABRICS. APPLICATION FILED DEC.22, I9I3.

I, 1 60,946. I Patented Nov. 16, 1915.

3 SHEETS-SHEET l.

IIIIIIIIIIIIII COLUMBIA PLANOOIAPH CO'HWASHINGTON, D. C.

.I. H. NANGLE.

MACHINE FOR TRIMMING LEATHER AND OTHER FABRICS.

APPLICAT ION FILED DEC. 22. I933.

Patented Nov. 16, 1915.

3 SHEETS-SHEET 2.

m a. Qg k.

COLUMBIA PH CO.,WASH|NOTD N, D. C

J. H. NANGLE.

MACHINE FOR TRIMMING LEATHER AND OTHER FABRICS. APPLICATION men 0Ec.22.' I913.-

1 1 60,946. Patented Nov. 16,1915.

3 SHEETS-SHEET 3- 90 7 1 1 COLUMBIA PLANOl-IRAPH 50-,WASNINGTON, D. C.

JAMES H. aware; or LYNN, MASSACHUSETTS.

re n/i3.

MACBINE non TRiM M I NG LEATHER AND OTHER FABRICS.

To all whom/ itmag concern: U I

, Be it known that I, JAMnsj H. NANGLE, a citizen of the United States, and resident of Lynn in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements inyh/Iachines for Trimming Leather and other Fabrics, of which the following is a specification.

The present invention relates to a machine designed for trimming sheets of leather or other material by cutting off the edges thereof, such machine being particularly designed and adapted to trim irregular sheets,,of leather and othermaterials such as tanned hides and skins, fabrics, and so forth, to cut off those portions of the edges which are curled back or are torn and ragged, and to cut sheets of any description to a pattern.

The machine is therefore designed that it will permit the hide or other piece ofv leather or fabric so moved and turned that the cutting may take place in a. line follow.- ing the outline of the piece or the outlin of a pattern; and with feeding meanswhich propel. the hide or other sheet and also per: mit the sheet to be turned freely about the point of its engagement with the feeding means. I

.The features above mentioned are those which particularly adapt; the machine to serve its designed purpose.

Other novel features of greater or lessimportance are also. embodied in. the machine as will appear, inthe following detailed de-, scription, and .all of such features are claimed as parts of my present invention tothe extent towhich such-featuresare novel and employc novel principles-or novel details of constructions, arrangement, and operation. 4 U 1 In the accompanying drawings,Figure 1 is a side elevationof a leather cutting machine embodying my invention in the form at present best known'to me. Fig. 2 'isa plan view of saijdmachine. Fig.3 is a front elevation of, saidmachine. Fig. l is .a rear elevation of so muchof the machine as com-1 prises the driving mechanism for the automatically moving parts of the machine Fig. 5 represents a detail ofthe machine,

being a vertical section on the line 5&5 of Fig. 1 and showing the means for feeding the work. Fig. Gris a sectional elevation' of the parts at theleft of line 6-6 in Fig. 1, showing apart, ofthe feeding means and a guide for the cutter. Fig. is a plan view Specificationjof Letters Patent.

r temedrew. 16, 1915.

' (Application filed December 22, 1913. Serial No. 808,085.

ofthe work table of the machine. Fig. Sis

across sectional view of said table taken on line 8 8 of Fig. 7. i

The. same reference characters indicate the. same parts in all the figures.

The frame of the machine here illustrated comprises a base; 10, a'column or support 11,

and a second column or upright 12, these parts serving to supportthe operating and driving elements of the machine and being illustrative of any meansj'or elements which might be used for the same purposes. .The base includes as apart of its structure, or has connected withit, a table-l3 whereon the work ll,Wl1 l0l1 is.) ordinarily atanned skin 7 orshide', but may be any other regular or irregular sheet of leather or other material, is-.,supported with capability of movement over its supporting surface. 1 When placed onl'the table. in position for operation the work is gripped between feeding elements 15. and 16,01 which the former is preferably a Wheel having a roughened, corrugated. or

toothed periphery, and the latter is a disk I will; here-insertia description of the means for so adjusting the feed wheel. Said feed wheel is mounted rotatablyv on a stud 18 carried byanarm 19, which is mounted to turn on a shaftQOas aipivot, said shaft QO being a horizontal shaft extending from front to rear of the machine having its bearings at 21and22 in the opposite ends of the machine. base and carrying a gear 23 for driving it. Arm-191s thus capable of swinging up and down n a vertical plane, and 1t is so swungby a wedgepiece 2 l, whichaprm jectsthroughthe front of the base, in, which it ismounted with capability of sliding, endwise, and has. a cam or wedgesurface25 at its end underlying andengaging the arm 19 below the. stud 18. An-adjusting screw 26. is threaded into .the front wall of the base near the wedge 24 and has a groove provided between collars, ,which j receives a fork, 27 fasrtenedto thewedge, whereby turning of the screw has the eflect of moving thewedge in orout and of correspondingly raisingbr band knife. Located in this groove is a lowering the feed wheel. A. spring 28 is provided to put'a tension on the screw and thereby produce I The feed \vh'celis rotated by the shaft through a pinion 29 keyedupon said shaft,- an idler;

gear 30 with which pinion 29 meshes and a gear meshing vi'th' the idler 30' and fas-w The complemental feed disk 16, which is also a .presser footisvcarried by a rotating upright" shaft 32 which is held rota tably in bearings 33 and 3% forming part ofpiec'e 35, which may be conveniently called forthe purposes of this description a" holder for the shaft. 32. Said shaftis provided with an adjustable collar 36 and is surrounded by spring-37 located between said collar and the upper bearing 33, and being placed under suitable tension bythe adjustmentof collar 36 so that'itvpres'ses the combined feeddisk and presser foot 16 uponthe work. The holder 35 is pivoted to bracket or support 38 which formsa part of the column 11," its pivot being shown at'1'39"and"b'eing equipped with a clamp screw 40. Thereby 'the'holder 35 may be swung about'a horizontal axis sons to alter the-point in the face of the disk 16" which acts on the work. Bycausing more or less of the area of the disk tooverlap the feed wheel, the area of the part of the'w'ork gripped thereby may be varied. The location of the 'piv t"39 is such that the shaft 32 is somewhat inclined to the table,

whereby only that side of the disk 16 which coeperates with the wheel 15 engages the work, and those parts of the disk which travel in other directions than the feeding direction do not rub 'on the work.

The-cutter'or' cutting element of the *mae' i chine is a band knife 41,1which passesabout cured thereto in any desired manner, for

the guiding and driving pulleys 42 and 43, the latter pulley being below the table.

' Thusth'e band knife crosses the table, and

the operating stretchtravels close to" the appears from Figs.--1, Land 8. 1 That portion of the? work table immediately adjacent to'the' cutting" and feeding elements" iscoins posed of plates Maria 45', which cover an opening in the table and aredetachably se-j instance, asshown" in Fig. 7 Openings are left in theseplates for the passage of the band knife and for the feed wheel 15 to extend through, andinthe plate 45 is an undercut groove extending between'th'e iecarions of. the opposite stretches of the friction 7 between; the threads of the screw and the intermeshing' threads 1n the machlne base.

knife holder or backer consisting of a slide ter and the knife 41." The bar and backing slide 46 guide the operative part of the lmife in an exactly defined location, but the slideis capable of yielding, thus allowing the knife to yield when necessary. A further guiding or s'teadying device toprevent the thrust of the advancing work from displacingthe knife is provided in the form of two disks 53 mounted on astud 54:, which iscarried by an adjustable armor bracket 55' on the 'holder' or bearing "piece, 35. These disks admit the back edge of the knife be tweenthem, and their hub portions,- or the stud. 54, engage the back ;of the knife at a slight distance above the location of the work,preventing theknife from yielding in consequence of the pressure of the work against its cutting edge. d sks a' single-dlsk havlng a per pheral Instead of two groovemay be used'with the same effect. A

spring 56"bears on one of the disks for causing the disks to engageboth sides of the knife but without causing them to bind. The bracket carrying the guide disks is fastenedto the bearing piece 35 by a-'screw 57, which passes through a slot 58 inthe' bracket and is threaded into the bearing piece Still another 'guideyor'guard, for the knifeis provided to revent the same from working olfthe gui e pulley' {i2 when acted upon bya grinding wheel 59, hereinafter described, and also for' holding the knife "against the grinding wheel during the grinding operation. This combined guide and guard comprises a bracket 60 secured to the'side of the column 11 and having two fingers'61, which'are respectively on opposite sides ofthe plane of the grinding wheel and project close to the knife on the opposite side thereof from the grind ing wheel as shown in'FigL'1.-These fingers support ,the knife against deflection when the grinding wheel is moved over so as to bear on the edge of the knife for sharpen5 ing. The guard to prevent the knife from traveling off the'pulley when'acted on "by the grinding wheel isa bracket or finger 62 secured to the guide and crossing the 1 line of the knife in back of the same. -It

does not normally touchthe knife butis in position whereit will do so in case the knife should startto creep ofl' the pulley.- V ertical adjustment of the guide pulley 42- regulate the ut'ensionof' the knife is provided by mounting the bearing stud 63 for said pulley on a slide 64; which isv set into a vertical :guideway into the side of the column 11 and is capable ofbeing, adjusted. Adjustments of: the slide are main tained by a screw 65 which passes through a slot 66 in the back of the column 11, is threaded into the slide 64 and has'a head adapted to bind against the column and thereby to clamp the slide. A? locking set screw 67 is providedto bear against the shank of the screw 65 to prevent the latter from becoming accidentally loosened.

The grinding wheel 59, before mentioned, is secured upon a short shaft 68 rotatably held in bearingsbi) and 70 formed in a swinging bracket or holder 71, which hasaflpivotal mounting on a pin 72. mounted on the column 11. The arrangement of the bracket is such that the grinding wheel may be swung against and away from the knife. For regulating the position of"tliegwheel and holding it against the knife I provide a lever 73, which is pivoted on a .pin 74 mounted in a bracket 75 fixed to theside of the collar. Said lever has an arm 73 adapted to press against one of the'bearings of the emery wheel shaft, and a second arm 73 equipped with an adjusting screw 7 6, which bears against one side of the bracket 75. The arm 73 has a surface which acts as acam to move the emery wheel toward the knife when the screw 76 is screwed againstthe bracket 75.

Power to drive the machine is delivered by a belt ,which passes about a pulley '78 carried by a shaft 7 9, which has bearings inthe post 12 and in a bracekt 80 connected to said post. 79 carries a pinion 81 whichmeshes with a large gear- 82 wherewith is connected a pinion 83 in mesh with the gear 28, previously described as beingthe driver for the shaft 20. Thus the shaft and feed wheel 15 are 7 driven at a relatively slow speed.

The same shaft drives the upper feed disk 16 by means of a pulley 8e; and a belt 85 passing around said pulley, over guide pulleys 8G mountedon the post 12, andaround a pulley 87 mounted loosely on theshaft 32. A friction drive is given to shaftl32 by pulley 87 through a clutch consisting of a cone secured to the shaft and a socket 89 forming part of the pulley with walls tapered in ternally to fit the outer surface of the; cone 88. The spring 90 interposed between the pulley and a head 91 fastened to the end of the shaft holds the members of the friction clutch in contact. T hepurpose of the clutch is to permit the operator to vary the'speed of feeding the leather, allowingthe operator to hold back the work without causing the disk to be retarded or stopped.

moving parts of the.

Shaft- The knife is driven from the shaft 7 9 by a pulley 92about which passes a belt .93 running over guide pulleys 94, pivoted upon a bracket95 secured'to the rear side of the machine base, and thence around a pulley 96 fast to the shaft 97 on which thelower guiding anddriving pulley 93 for the knife is fastened. A

Another pulley 98, secured tothe s iaft 79 drives a belt 99 which passes over guide pulleys 100 mounted on an arm 101, extending from the bracket 7 5, the belt also passing around a pulley 102 secured to the shaft 68 of the grinding wheel.

A machine having the characteristics and elements above described is well adapted to.

serve the purpose of trimming the edges of irregularly shaped pieces of leather, such as skins and tanned hides, etc or other material. The knife, being in motion, continually at any speed best suited for the work in hand, cuts with a drawing action and thus constitutes the best possible means for making a clean cut and leaving the trimmed complemental gripper being arranged close to the operative portion or stretch of the knife and so formed and arranged as to make contact. with the work over a small area, that is, making a substantially tangent-contact, enable the work to be turned readily so that the cut made by the knife may followthe projections and indentations of the irregular outlineof the hide or other work piece. Evidently the tangent gripping contact of the feed means is the pivot point about which the work maybe turned or swung in the plane of the table or work support, and this pivot point is so close to the edge of the knife that such swinging'or turning movement of the work takes place around the knife. The knife, owing to its sli ht width ermits the work to be turned quickly enough for the required purpose so that the "trimming cut may follow the outlines" ofsharp indentations without removing the' 'good material at any considerable distance back fronrthe edge of thenwork. The extent of contact between the grippers and work in the direction of feedingis ap proximately or nearly the same as the width of. the knife.

Themeans for guiding the knife consisting of, the bar 51, backing piece 46', and

guide disks 53prevent the flexible band knife 1 from being twisted or deflected in any direction when the work is pressed against it and turned whilebeing fed. These guides, or

ters Patent is z their equivalents,are adjuncts having con- :siderable influence in adapting the machine to perform its desired function. r

I desire to have it understood that in give ing the foregoing illustration of my invention, 1 have not intended this. illustration to be taken'as necessarily a commercial or finished machine. So far as the essential operating parts of the machine are concerned, the embodiments-of-such parts here shown are operative and complete, but it'is my intention to make modifications which may alter the general appearance of the ma chine and particularlyof the frame thereof materially, but which will'not be any departur'efrom the spirit of the invention.

' What I claim and desire to secure by Letl. A machine for trimming the edges of sheet stock, comprising a support for the stock, a cutter arranged with its edge crossing the plane of the support, means for moving said cutter sothat its edge travels in a 'direction transverse to the support, and

work gripping and feeding means construct ed to grasp the work wlth' a tangent contact close to; the cutter the cutter having a width in the feeding direction substan-' tially as'narrow asathe extent of contact ,of the work feeding means" with the work,

point in the edge of said knife, operative to feed the work in a direction transverse to that in which the operating point in the knife edgetravels, said grasping means having a sufliciently small areaof contact with the work, and the knife-being sufliciently narrow in the direction of feeding, to permit the work to knife. Y

3. A machine adapted tot-rim the. edges be turned or swung around the of hides and other'articlesofirregular out-E line comprising a knife having a slight width fromcutting edge to back, and means 7 for gripping and feeding the work past the knifein the .directionffromthe edge to the back thereof, said work feeding means being arranged'to grasp the workat a point close to the knife edge, and constructed so thatthe area of; contact with the work is relatively small, whereby to oppose the least possible resistance to turning'the. work about. the area of gripping contact (as a pivot. 1 .7

4. A machine for trimming hides and the like, [comprising a flexible endless band knife,means for driving said knife so that aportion ofthe edge thereof travelsin a straight line, work gripping and feeding meanslocated close to said portion of the knife edge and arranged to feed the work in a direction approximately at right angles to that at which said portion travels, theknife being so narrow from edge to back arranged with a stretch thereof crossing said support. approximately at right angles thereto, a work feeding wheel arranged be low said support with its periphery projectingthrough thesame and-above the sup-' porting surface thereof, a complemental' pressing device arranged I over said feed wheel to engage the upper surface of the work, guiding. means in the plane of the work support engaging opposite faces of the knife, and aguide above the work support bearing against. the back of the knife.

6- In a trimming machine of the character indicated, the combination with a work feeding means of an endless flexible band knife mounted with a portion thereof extending close to said feeding means and traveling in adirection transverse to. that in which said feeding means is1designed to feed the work, and cooperating knife guiding means locatedin close proximity to said. feeding means arranged to engage the opposite sides and the back of the knife, re-

spectively, to prevent twisting and other deflection thereof.

7.'In .a trimming machine the combination with a work support and a cutter, of a feed wheelhaving its periphery passing across the work support from the side thereof. opposite to that against which the work lies, a 'movably mounted holder carrying said feed. wheel, a cam member engaging said holder, and means for moving said cam member so as to effect movement of vthe holder in opposite directions ina line transverse to the work support. r Y 1 8. Inv a trimming machine, a, work support, a feed wheel adapted to engage the work laidagainst said support, a, holder for saidfeed wheel movable back and forth in a direction transverse to the work support, a cam member operablefor so moving the holder, and flexibly arranged gearing for driving the feed wheel in any of its positions of adjustment. r

9. In a machine of the character described, an adjustable feed wheel, a holder in which said feed wheel is mounted, a drive shaft upon which said holder is pivoted, gearing between said drive shaft and feed wheel, and a cam o-rwedge supporting the swing-, ing portion of saidholder and being adjustable to raise and lower thesame. r

10. In a machine of the character described, a work support, a feed wheel located beneath said support with its periphery projecting through the same, a drive shaft beneath the work support, an arm pivoted co-axially with said shaft and carrying said feed wheel, driving gearing between said shaft and feed wheel, maintained in mesh in all positions of the arm by reason of the coincidence of the pivot of said arm with the axis of the shaft, a wedge having a'cam surface underlying and engaging said arm and means for advancing or withdrawing said wedge for causing the part of the arm which carries the feed wheel to be raised and lowered.

11. A leather cutting machine comprising a cutter, a feed wheel and a complemental gripper and feeding device, said complemental feeding device being mounted on an axis approximately perpendicular to the axis of the feed wheel and arranged so that one side of its periphery overlaps the feed wheel at a point close to the cutter, said complemental gripper being also movable away from the feed wheel and being yieldingly pressed toward the latter. 7 7

12. In a cutting machine, a feeding mechanism comprising a rotatable feed wheel, a complemental feed disk rotatable in a plane approximately at right angles to the plane of the wheel and having a part of its periphery overlapping the periphery of the Wheel, means for positively driving the feed wheel, and means for frictionally driving the complemental disk.

13. In a machine of the character described, the combination with a work support, or table, of a feed wheel located below the table in a plane substantially perpendicular thereto and having its periphery projecting through the table, a complemental feed disk located above the work table, a substantially vertical shaft to which said disk is connected, located so that the edge of the disk lies over the feed wheel, said shaft being so inclined that that portion of the disk over the feed wheel is nearer to the work table than any other part of the disk.

14. In a trimming machine, the combination with a work table and a feed wheel passing from below the table through an opening in the same, a complemental disk arranged over the work support in a plane nearly parallel therewith, an upright shaft carrying said disk, a holder for said shaft, and a post rising above the work support on which said holder is pivotally mounted, said holder being thereby adjustable to vary the position of the disk and cause more or less of its area to overlie the feed wheel.

15. In a trimming machine, the combination with a work support and a feed wheel presser and feed member comprising a disk arranged over the support and overlapping the feed wheel, a shaft to which said disk is connected rising from the feed wheel, a support by which said shaft is held with ability to rotate about its axis, and frictional driving means for rotating said shaft.

16. In a machine of the character described in combination with a feed wheel, a complemental feed disk and gripper, a rotating shaft by which said complemental disk is carried, so located and arranged that the, disk occupies a plane approximately perpendicular to the plane of the feed wheel and overlaps the periphery of the feed wheel, a holder for said shaft mounted pivotally on an axis perpendicular to the axes of both the feed wheel and the disk, whereby the distance by which the disk extends across the feed wheel may be varied.

17. I11 a machine of the character described, in combination with a feed wheel, a complemental feed disk and gripper, a rotating shaft by which said complemental disk is carried, so located and arranged that the disk occupies a plane approximately perpendicular to the plane of the feed wheel and overlaps the periphery of the feed wheel, a holder for said shaft mounted pivotally on an axis perpendicular to the axes of both the feeding wheel and the disk, whereby the distance by which the disk extends across the feed wheel may be varied, said 7 shaft being also movable endwise in said holder and yielding means arranged to press the shaft and disk toward the feed wheel.

18. In a machine of the character described, in combination with a feed wheel, a complemental feed disk and gripper, a retating shaft by which said complemental disk is carried, so located and arranged that the disk occupies a plane approximately perpendicular to the plane of the feed wheel and overlaps the periphery of the feed wheel, a holder for said shaft mounted pivotally on an axis perpendicular to the axes of both the feeding wheel and the disk, whereby the distance by which the disk extends across the feed wheel may be varied, a driving element for said shaft and a friction clutch connected with said driving element and to said shaft with provision for slipping.

In testimony whereof I have affixed my signature, in presence of two witnesses.

JAMES H. NANGLE.

WVitnesses:

D. L. CLARK,

P. W. 'PEZZETTI.

Copies of this patent may be obtained for five cents each, by addressing'the Commissioner of Patents; Washington, D. G.

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