US2420667A - Pulling-on machine - Google Patents

Description

May 20, 1947.

J. s. KAMBORIAN 2,420,667

PULLING-ON MACHINE Filed March 24, 1944 2 Sheets-Sheet l jwerziar M J ,3? Mariam y o, 1947. J. 5. KAMBORIAN 2,420,667

PULLING-ON MACHINE Fild March 24, 1944 2 Sheets-Sheet 2 Patented May 20, 1947 UNITED STATES PATENT OFFICE PULLING-ON MACHINE Jacob S. Kamborian, West Newton, Mass. Application March 24, 1944, Serial No. 527,890

This invention pertains to the manufacture of footwear, and relates more particularly to a machine for lasting shoes of the force-lasted or sliplasted type. Slip-lasted shoes usually have a very flexible insole or sock-lining, the margin of which is permanently united directly to the shoe upper before lasting, the upper being out without substantial lasting allowance. When the sock lining and upper have thus been united, a last can only be introduced into the shoe by distending and stretching the upper, this stretching of the upper by the introduction of the last constituting the entire lasting operation. Usually the last is introduced into the upper by hand, the operator inserting the toe portion of the last into the upper and then with his hands frictionally urging and pulling the forepart of the upper onto the last in much the same way that a tight glove is pulled onto the hand. As a shoe making operation, this slip or force lasting is laborious, fatiguing and slow and adds materially to the difficulty and cost of making shoes of this type. The present invention has for its principal object the provision of mechanism whereby the operation of slip lasting is facilitated; is made better and more uniform; the labor and fatigue greatly decreased, and the cost reduced. Other and further objects and advantages of the invention will be pointed out in the following more detailed description and by reference to the accompanying drawings wherein Fig. 1 is a plan view illustrating the apparatus of the present invention; i

Fig. 2 is a side elevation of the apparatus;

Fig. 3 is a rear elevation looking forwardly from the rear end of a last mounted in the machine, the upper wiping elements being shown in operative position; and

Fig. 4 is a view similar to Fig. 3, with certain parts broken away, showing the upper-engaging pads separated to facilitate removal of the lasted shoe.

Referring to the drawings the number I designates a bench or support upon which is mounted thebase 2 of the machine. Near the rear end of the base there is arranged a pedestal 3 comprising an upwardly extending, screwthreaded post 4 which receives a screw-threaded adjusting nut 5 carrying the last-supporting pin 6 on which the last L may be mounted. Preferably, as shown in Figs. 3 and 4, the pedestal 3 is provided with a pair of downwardly directed parallel spaced ears 1 which extend down through an opening in the base 2 and into a registering opening H] in the bench l and which support a 6 Claims.

2 pivot pin 8 on which is mounted a grooved pulley 9.

The base 2 is provided with spaced, rigid, parallel guide members I l and I2, furnished at their inner edges withlslots which receive the opposite edges respectively of a slide i3 capable of 'movingfrom front to rear relatively to the base memher 2. The forward edge of this slide [3 is pro-' vided with a member M (Fig. 1) to which is at- 10 tached one end of a flexible cable 15. This cable passes over the pulley 9 and downwardly through the opening ID in the base and is connected at its lowerend to a treadle (not shown) which may be actuated by the foot of the operator thereby to pull the slide I3 rearwardly. A ten- 2o rod [9 projecting forwardly from the base 2. The

spring l6 constantly tends .to move the slide it forwardly and to retain it in its normal or inoperative position.

Mounted on the slide I3 is a support 29 which is connected to the slide l3 by a pivot bolt 2G (Fig. 1) in such a way that the support 20 is free to swivel about the vertical axis of the bolt. Adjacent to its opposite edges the support 20 is furnished. with pairs of upstanding lugs 2| (Fig.

2) which receive the opposite ends of pivot or hinge pins 22, 12 (Fig. 4) respectively, the axes of these pins being substantially parallel to the guides l1 and I2 and the axis of the last L when the latter operatively is mounted in the machine.

5 Upstanding rigid wing members 23 and 23 are pivotally supported by the hinge pins 22 nd 22 respectively. These Wing members are so shaped that while their lower ends turn or swing about the parallel hinge pins 22 and. 22 their upper parts are inclined relatively to each other diverging from each other toward the rear end of the machine as shown in Fig. 1. At the inner surface of the upper part of each of the wings 23 and. 23 there is mounted an upper pulling element 24 and 24* respectively (Fig. 4) these pulling elements being here shown as friction pads, for example of crepe rubber or the like, the respective pads being held in place on the wings by means of flanged retainers 25, 25 for instance of sheet -metal, secured to the respective wings by screws or rivets.

Forwardly of the support 20 there is arranged a rigid upright post 26 (Fig. 2) having a forwardly directed substantially horizontal bracket 26 which carries a second, shorter post 26 parallel to the post 26. The posts 26 and 26 have bearing openings for a shaft 21 to whose rearward end there is fixed a rigid lever having oppositely directed arms 21* and 21*, (Figs. 3 and 4). An actuating arm 28, integral with this lever, extends laterally and is of substantial length so as to ailord good leverage and at its outer end is provided with a hand-engaging element 29. A link 38 is pivotally connected to the lever arm 21 and also to the wing 23*, while a similar link 3| is connected to the arm 21 of the lever and to the wing 23. Tension springs S and s (Fig. 1) constantly urge the wings 23 and 23 toward each other. The spring S is shown (Fig. 1) as connected at one end to a screw-threaded rod 32 which extends through an opening in the wing 23* and is engaged by a wingnutfidwhereby the tension of the spring may be varied. The spring S may likewise be provided with adjusting means if desired. By adjusting these springs the force urging the pads 24 and 24 toward each other may be varied.

At itsupper end- .the post 26.0arr-ies a transverselyextendingpivot pin 34 on which is mounted alever having the rearwardl-y directed arm 34eand=the forwardly directed armSE; The arm 35:is provided at one side (Fig. l) with a pairof spaced lugsifi wihichreceive a pivot pin3'l which passesthrough an opening in a head 38- at the upper .end of. a link 39 whose lower end is pivotally. secured .to an arm 4.0 fixed to the. shaft 21.

Ascrewi-threaded adjusting-boltAl hasthreadedengagernent with an opening in the forward endof the bracket 26% and isproVided-with a knurled head' lz at. its upper end. An adjust, able collar, 43: is.v mounted on..this bolt: .4] and forms; anabutmentfor the lowerend ofa compression spring ,tflrwhoseupper endengages the lever arm fifizthusconstantly tending to lift the arm 3.5; The rearwardarm 34 of this lever is provided with a resilient. pad 45', for. example .of crepe rubber or the like, which is wrapped around or otherwise mounted on the endof the arm-34 and which preferably. embraces a rigid transverse fillermember 41, the pad being secured to .the arm .34.? by a screwlorscrews .46.-

In the operationof the machine, and assuming that the. slide I3- is in the normal .orforward inoperative, position, the operator will take an unlasted shoe. comprising a sock lining or. inner sole, having an upper united thereto, and will. draw this shoe over the toe portion of the lastv L mounted on the. post'l; pulling. the shoe as far. backwardly on the lastas can easilybe accom-. plishedby hand. The operatorv then placeshis' foot .onthe treadle-thus gradually drawingthe.

slide. I3 rearwardly. The divergent pads 24 and 2.4%, together withthe pad 45, are thus caused to move rearwardly, the pads 24 and 24?"en-.

gaging. the upper at opposite sidesof the. fore.- part of the last while the pad 45: engages the sock; lining. Asrtheslide l 3-continuesto move rearwardly, the friotionaldrag of the pads 24, 24s and 45::on theupper material and sock lining drawthe shoe. snugly about the forepart of the lastso as to. stretch the upper and eventually to dispose the toe of theilast withintheextreme toe of the. upper. During this operation the pads 24.:and'24 swing apartto some extent, but being. urged toward eachgother by the spring Sand S. exert a heavy pressure againstithe-upper, thus frictionally dragging the upper rearwardly over the last. When the toe ofthe last has been dis.- posed ;in-the extreme forward end ofthe upper, theoperator then pulls the heel portion of the operation,as by the use of a treadle or the like,-

if desired. Having drawn the upper .down over the heel of the last, the operator then depresses vthe lever arm 28, thus, by means of the links 30,

3| and 39, disengaging the pads 24, 24 and 45 from the shoe, so that when the slide I3 is released to resume its normal forward position the pads do not exert any dragging action on the shoe upper. during the return of the parts to normal p si i While one desirable embodiment of the invention has been disclosed by way of example it is to be understoodthat..theinvention is not necessarily limited .to this precise construction but is to be regarded as broadly inclusive of any and all equivalent arrangements.

I claim:

1. In a machine of the classy described, abase and a last support fixedlyv mounted therein, a slide mountedin guides on the base for. movement toward and iromthe last support, means for moving the slide forwardly away. from the last support, and means whereby the slide. may be moved rearwardlytoward't'he last: support;. a

pair of spaced rigid wings hingediat their; lower. edges to the. slide, thewingaxesbeing substanetially parallel to. the direction; of. movement" of. the. slide, but theupper portions .of the. wings. diverging. rearwardly, an upper-pulling. element.

carried by each wing, spring means-urging; the upper ends oithe wingstoward; each other, a

lever carried by. the; slide, thepivotalf axis of the lever extending'transversely of theslide; a. pressure pad carried by: one arm ofthe lever,-

and adjustable spring. means acting. upon the opposite arm of the lever to .urgewthe-pad down-.-

wardly toward the bottom: of alast. mounted n. h last s pp 2. Ina machine of the classdescribed, a base and a last support fixedly mountedtherein, a slide mounted in. guides on the-base for: movementtoward and. fromthelast support; means. tending to movethe. slide forwardly. away: from the.

last. support, andmeans whereby-the sli e-may be moved rearwardly toward the last support; a pair of spaced rigid. upright ,wingsh'inged: at their lower: edges tov the slide,- the upper. portions of the wings; being relatively inclined: andidiverging rearwardly, a friction padisecuredwto the innersurface of each wing, spring-meanswurging;:the wings towardeach other,gand meansbperative at will tov move -the:;upper; portions ofrthecwings apart.

3. In a machine of the class described, a base:

and a last support fixedly,mounted'therein,;.a

slide mountedzinguides on'thebase for: move-- ment toward; andfromgthe last support; means formoving the. slide:forwardly awayfrom. the:

last: support, and means whereby the slide. may

be moved rcarwardlytowardthe lastsupport, a.

pair of spaced. rigid; upright: wings. hinged at being, relatively. inclined. and divergingrear.-

wardly, theupper portions 'ofthetwowings being; spaced; apartJa. distance less. than. the width'of.

the forepart of the last, a friction pad secured to the inner surface of each Wing, spring means I opposing swinging of the wings away from each other, and manually actuable lever means for swinging the wings apart thereby to release a shoe after it has been lasted.

4. In a machine of the class described, a base and a last support fixedly mounted therein, a slide mounted in guides on the base for movement toward and from the last support, means for moving the slide forwardly away from the last support, and means whereby the slide may be moved rearwardly toward the last support, a pair of spaced rigid upright Wings hinged at their lower edges to the slide, the upper portions at least of the wings being relatively inclined and diverging-rearwardly, a friction pad secured to the inner surface of each wing, spring means tending to swing the wings toward each other, thereby to cause them-to engage the opposite sides of a shoe upper and to stress the upper as the slide moves rearwardly, a presser device operative to engage the sock lining of a shoe mounted on the last and to impart rearward lasting stress to the sock lining as the slide moves rearwardly, and manually actuable means operative concomitantly to move the upper portions of the wings apart and to lift the presser pad thereby to release the shoe after it has been lasted.

5. In a machine of the class described a base and a last support fixedly mounted thereon, a slide mounted in guides on the base for movement toward and from the last support, means for moving the slide forwardly away from the last support, and means whereby the slide may be moved rearwardly toward the last support, a pair of spaced, rigid, upright, pad carriers hinged at their lower edges to the slide, the hinge axes of the pad carriers being parallel but the upper portions of the pad carriers being inclined relatively to each other and diverging rearwardly, means yieldably urging said pad carriers toward each other, a resilient upper-pulling pad secured to the inner side of each pad carrier at the upper part of the latter, a post mounted on the slide, a lever fulcrumed on the post to swing about an axis extending transversely of the slide, a presser pad carried by the rearwardly directed arm of the lever, adjustable spring means acting on'the opposite end of the lever and urging the presser pad downwardly, and manually operable means for moving the upper parts of the pad carriers away from each other and for concomitantly raising the presser pad thereby to release the lasted shoe.

6. In a machine of the class'described a base and a last support fixedly mounted thereon, a slide mounted in guides on the base for movement toward and from the last support, spring means tending to move the slide forwardly away from the last support, and means whereby the slide may be positively moved rearwardly toward the last support, a pressendevice operative to engage the sock lining of a partially lasted shoe and to exert a rearward frictional drag upon the sock lining as the slide is moved rearwardly, and upper-pulling friction elements also carried by the slide and engageable with the opposite sides of the shoe upper, said friction elements exerting a rearward pull on the upper as the slide moves rearwardly thereby to draw the upper snugly about the last, and means for disengaging said upper-pulling elements and presser device from the shoe prior to the return movement of the slide toward its forward position.

JACOB S. KAMBORIAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,318,499 Knowlton Oct. 14, 1919 1,360,084 Bourgeois Nov. 23, 1920 1,537,683 La Chapelle May 12, 1925 2,226,774 Lancaster Dec. 31, 1940

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