US1482410A - Machine for shaping uppers over lasts - Google Patents

Description

Feb. 5, F924. C. F. PYM

MACHINE FOR SHAPING UPPERS OVER LASTS ori inail Filed Aug; 13, 1919 s Sheets-Sheet 1 Feb. 5, 1924, 1,482,410

. C. F. PYM

MACHINE FOR SHAPING 'UPPERS OVER LASTS Original Filed Aug. 13. 1919 s sheet's-sheet '2 c. F. PYM

MACHINE FOR SHAPING UPPERS OVERLASTS Original Filed Aug. 13, 1919 3 Sheets-Sheet 5 Patented Feb. 5, 1924.

UNI-T ED STAT-Es PAT" Y *CHARIJES F. P-YIVL. OFQLYNNZ MASSAUHUSETTS, ASSIGN'OR TO UNITED. SHOE MACHIN- ERY CORPORATION, OFPATERSON,NEW JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE lFOR;SH-APING UPPERS OVER LASTS.

Applicationfiled August-'13, 1919, SeriaIYNo. 317,302. Renewed September 27, 1922. Serial No. 591,000.

To. (iZZ whom it may concern:

Be it'known thatI, CHARLES F. PYM, a subject of the Kingof England, residing at Lynn, in the county ofEsseX and State of Massachusetts, have invented certain Improvements in Machines 'for Shaping-Uppers'Over Lasts, ofwh'ich the "following de-, scription in connection with the-accompanying drawings, is a specification, like referencecharacters on the drawingsindicating likeiparts in: the several figures.

This invention relates to machines for shaping uppers over lasts, and more particularly to means for operating on'the end portion of a boot or shoeto conform it to the contour of the last or equivalent shoe r'o-rm.

The invention is herein illustrated by reference to its use in a machine for pulling over a shoeand for lasting the toe portion of the shoe; but it is to be understood thatthe invention in its broader aspects is not restricted in utility to machines for performing both pulling-over and lasting operations norto mechanismspecifically designed for toe lasting.

An objectof the invention is to provide an improved construction of end lasting mechanism. including end. embracing wipers the operation of which is so effected and controlled asto insure uniformly good results irrespective of variations inthecharacter orposition of the work. The invention is herein shown as incorporated in a type of machine illustrated in Letters Patent No. 1,436,194granted upon my application-on Nov. 21, 1922; and in one aspect the present inventionprovides an improvement in lasting mechanism of the general-type disclosed in said patent, although itwill be recognized that the invention is by no means limited. in its applicability to that particu lar' type of machine.

A feature of the invention consists in a novel construction and arrangement of wiper mechanism including wiper closing means which is rendered operative in ,response to pressure or resistance of the work. In the construction shown closing movement laterally of the shoe is imparted to the wipers inresponse toresistance encountered by the edges of thewvipersuponengagement with the uppermaterials in their advancing movement lengthwise of the shoe, the'wipers being bodily yieldable' relatively to their support which continues its movement and by such movement. operates through gearing connections to clos the wipers. The wipers are thus self-adjustable to the shoe, and uniform results are insured under varying conditions, In order further to insure uniformity in the action of the wipers upon different portions of the upper .materials round the end of the shoe, the invention provides controlling means constructed to cause the wipers to close into substantial conformity to the contour of the edge of the shoe bottom, in response to the resistance encountered, before they become effective with any substantial overwiping action at the end of the shoe, and then to wipe the upper inwardly atthe end andat the opposite sides of the end portion of the shoe substantially simultaneously.

Important advantagesare involved in the use .of the invention in a type ofmachine like that herein shown in which pullingover and lasting operations take place in sequence and in which it is of particular importance thatthewipers secure-effective control of the tensioned upper before the latter.- is released by the pulling means, and a further feature of the invention consist-sin the novelcombination thus provided.

The above and other features of the invention, including certain details of construction and combinations of parts, will now be more particularly described with reference to the accompanying drawings and pointed out in the claims.

In th drawings,

Figure l is a view in side elevation, and partly in vertical section,of a portion of a machine of the type shown in the patent above mentioned, including toe lasting mechanismconstructed in accordance with this invention;

.Fig. 2 is a plan view of the toe lasting mechanism detachechwith a portion of the structure broken away Fig. 3 isan inverted plan view of the mechanism shown in Fig. 2, and

Fig. .4 is a section on theline 4 of Fig. 3. y V

H he machine shownicomprises grippers for engaging the upper at the toe endof the last and at opposite sides otthe forepart, the toe gripper 2 only being shown in the drawings,'since it is this gripper which is intito grip and pull the upper by means of their updraw levers, the toe gripper lever being shown at 10 in Fig. 1, and as the grippers are operated the sole rest 4, together with the members 6 and 8, is swung downwardly a short distance by the action of a cam 12 to supplement the pulling action of the grippers, the heel rest 14 meanwhile being moved upward into supporting position at the heel end of the shoe. The machine then comesv automatically to rest withthe upper held under tension.

Upon a subsequent starting of the machine shoe clamping and supporting devices 16 are moved into operative relation to the fore part of the shoe and operative movement is imparted to the end lasting mechanism. This mechanism is mounted on the lower end of a front arm 18 pivoted at 20 on the frame of the machine and connected to an operating slide 22 whereby the arm is swung rearwardly adefinite distance to cause the lasting mechanism to assume control of the tensioned upper and to perform the lasting operation; Thelasting mechanism comprises end embracing wipers 24 which are connected together to swing relatively about a pivot 26, shoe end embracing members 28 mounted on pivots 30 on the lower side of the wipers in position to embrace the end of the shoe and to serve as supports for a lasting binder a; positioned between these members and the wipers, and driver plates 32 pivotally' connected to the wipe-rs and arranged to close inwardly'between the wipers and the members 28 to force the binder into holding relation to the upper and to drive its inturned ends into the shoe. Springs 34 arranged to l-ear oppositely against the members 28 and the driver plates 32 tend to force these members inwardly and the driver plates outwardly to limits determined by pins 36 which are carried by the wipers and engage in slots 38 and 40 formed respectively in the members 28 and the driver plates 82. As the wiper mechanism is moved toward the shoethe members 28 are permitted to yield outwardly against the tension of the springs 34 in conformity to the shape of the shoe and may serve finally to limit the overwiping movement of the wipers. Operative movement is imparted to the driver plates 32 to apply the binder to the shoe and fasten it by means of swinging driver arms 42 conne'ited by links 44 to bell cranks 46, the latter being operatively connected to the outer end of the slide 22.

The lasting mechanism as a whole is mounted on a support 48 connected by means of a pivot '50 tothe lower end of the arm 18 -in such manner as to'permit the wipers to yield upwardly against abnormal resistance. Asthe arm' 18 isswung rearwardly by the slide 22 the wipers are caused to perform their function as will" be hereinafter explained more in detail, the grippers being tripped automatically to cause them to release their hold upon the upper and the members 6 and 8 being withdrawn from 0P1 erative position to permit the wipers to close over the shoe. The tripping of the toe gripper is effected by engagement of a plate on the arm 18 with a pivoted tripping member 51. When the wipers have arrived substantially at their limit of operative movement, the slide 22 is swung downwardly and operates the driver plates 32 to apply the binder and fasten it, after which the Parts are returned to their starting positions and the shoe is released. In these various general features the construction may be and is herein shown as substantially like the construction shown and described in the prior patent to which reference may be made for a more definite understanding of the different details.

For the purposes of this invention, the wipers 24, together with the shoe embracing members 28 and the driver plates 32, are

supported on a plate 52 which serves as a wiper carrier and is slidable in guideways formed by downwardly projecting side portions of the supporting bracket 48, the wipers being mounted detachably on gear segments 54 which slide in are shaped guide- "*5 ways in the plate 52 to determine the path of closing movement of the wipers about their pivot 26. Springs 56 which bear oppositely against the plate 52 and lugs 58 on the bracket 48 tend to move thesliding plate 119 52 forwardly along its guideways as far as permitted by pins 60 which are fast on the bracket 48 and engage in slots 62 in the plate 52. The gear segments 54 are operatively engaged by pinions 64 mounted to turn about pivots 66 on the plate 52, these pinions being operatively engaged in turn by pinions 68 which are likewise pivotally mounted on the plate 52. In operative engagement with the pinions 68 are rack bars 70 mounted in guideways between the bracket 48 and the plate 52 and normally held in stationary relation to the bracket 48 by means of springs 72 which are adjustably heldbetween set screws 74 in lugs 76 on the bracket and the enlarged outer end portions of the rack bars 70 which have limiting engagement with the edge of the bracket. Mounted also on the plate 52 is a finger 7 8 which serves as additional means to support 339 the wire binder and is yieldable backwardly against the resistance of a spring 80 upon its engagement-with-the end face of the shoe. 7

The plate 52 and its supported mechanism are held normally by the springs 56, as shown in the drawings, in an advanced position relatively to thebracket 48, the wipers 24: being held in their outwardly retracted or open position by means of the rack and pinion mechanism hereinbefore described. When operative movement is imparted to the arm 18 to carry the lasting mechanism toward the shoethe parts-remain in these relative positions until thewipers come into engagement with the end of the upper which at this time is held by the grippers intensionedconditionov As-soon as the resistance of the work thus encountered overcomes the resistance of the comparatively light springs 56-, movement of the plate 52 and the wipers lengthwise of-the shoe retarded, and the supporting bracket 48 in its continued movement serves by means of the rackbars-TO, which are under the control of the comparatively strong springs 72, to turn the pinions 68 and 64; and thus to impart swinging-movement to the gear segments 54 to close the wipers inward laterally of the shoe'.- Preferably the wipers are positioned normally a sufficient distance in advance of the arm 18 to cause them to be closed into substantial conformity to the contour ofthe' edge of theshoe bottom before the grippers are tripped to release the upper, the closing movement of the wipers into this position being effected under control of the springs 56, prior to any substan tial overwiping action of the wipers at the extreme end of the shoe by reason of the comparatively heavy resistance opposed by the tensionedupper to the continued bodily movement of the wipers lengthwise of the shoe. As soon as the wipers have thus been closed about the end of the shoe they begin to close inwardly over the margin of the sole at the opposite sides by reason of continued movement of the support 48 relatively to the plate 52, the decrease in resistance to advancing bodily movement of the wipers upon the release ofthe upper by the grip pers permitting the plate 52 to be advanced gradually at the same. time by the increasing tension of the springs 56 and by force transmitted indirectly to said plate from the forward thrust of the rack bars depending uponthe resistance encountered by the wipers at the sides of the toe, to cause the wipers to wipe the upper inwardly also at the extreme end of the shoe. Practically therefore the overwiping operation is effected substantially simultaneously at all points round the end portion of the shoe, whether the upper materials are heavy orlight in character. If the wipers, however, complete their over-wiping operation at the end of the shoe prior to the completion of their lateral closing movement the heavy resist ance thusencountered limits their further bodily movement lengthwise of the shoe and causes the closing movement of the wipers to be accelerated until they complete the overwiping operation at the sides. If, on the other hand, the wipers are closed inward laterally of the shoe as far as permitted by the shoulder of the sole or by the members 28 before completing their operative 1nove- Inentat the end of the shoe, t-he springs 7* permit a relative yield between the bracket 48 and the rack bars 70 and thus permit the wipers'to advance without further closing movement or even to be forced laterally outward against the tension of these springs by the resistance of the shoe materials. When the arm 18 receives its outward "return movement after the overwiping and fasteningoperations have been performed, the springs 56 react and return the plate 52 and the wipers to their starting positions illustrated in the drawings;

lVhile the invention is herein illustrated by reference to its use in the manufacture of a turn shoe, it will be understood that it is not limited in utility to the manufacture of shoes of this particular type.

Having described the invention, what I claim as new and desire to secure'by Letters Patent of the United States is:

1. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for closing movement laterally of theshoe, means for moving said wipers bodily lengthwise of the shoe to operate them, and closing mechanisms for the respective wipers operative each independently of the other in response to the resistance to said lengthwise movement of the wipers encountered by engagement of the wipers with the shoe materials to impart to said wipers their lateral closing movement.

2. in a machine of the class described, the combination with shoe positioning means, of a wiper support, means for moving said support lengthwise of the shoe, end embracing wipersmovably mounted on said support to permit the support to move relatively to the wipers lengthwise of the shoe inresponse to resistance to the advancing movement of the wipers encountered by engagement of the wipers with the shoe materials, said wipers being also mounted forolosing movement laterally of the shoe, and means operated by the movement of the support relatively to the wipers in response to resistance encountered by the edges of the wipers to impart said lateral closing movement to the wipers.

3'. In amachine of the class described, the combination with shoe positioning means, of

a wi er su ort means for movin said su 7 b port lengthwise of the shoe, end embracing wipers mo ably mounted on said support to permit the support to move relatively to the wipers lengthwise of the shoe in response to resistance to the advancing movement of the wipers encountered by engagement of the wipers with the shoe materials, the wipers being also mounted for closing movement laterally of the shoe, means operated by the movement of the wiper support relatively to the wipers to impart said lateral closing movement to the wipers, and yielding means tor controlling the relative movement between the wipers and the wiper support constructed and arranged to cause the wipers to be closed inwardly into substantial conformity to the contour of the edge oi the shoe bottom in response to the resistance to their advancing movement prior to any substantial overwiping action. of the wipers at the end of the shoe.

4;. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for bodily movement lengthwise of the shoe and also for closing movement laterally of the shoe, and independent gearing tonnections for the different respective wipers operative in response to resistance to advancing movement of the wipers encountered by engagement of the edges of the wipers with the shoe mate rials to close the wipers inwardly into sub stantial contormity to the contour of the edge of the shoe bottom prior to any substantial overwiping action at the extreme end of the shoe and then to close them farther inwardly during their overwiping action at the end of the shoe.

In a machine of the class described, the combination with shoe positioning means, ot end embracing wipers mounted for closing movement laterally of the shoe, means [tor moving said wipers bodily lengthwise or the shoe, closing mechanisms for the different respective wipers operative each independently of the other in response to resistance encoun tered by the edges of the wipers in said lengthwise movement to close them inward laterally ot' the shoe, and controlling means to cause the wipers to be closed into substantial conformity to the contour of the edge of the shoe bottom in response to such resistance before they become effective with any substantial overwiping action at the end of the shoe and then to wipe the upper inward at the end and the opposite sides of the end portion of the shoe substantially simultaneously.

G. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for closing movement laterally of the shoe, means for effecting relative movement of said shoe positioning means and wipers in a direction lengthwise of the shoe to cause the wipers to operate on the shoe, and closing connections for the different respective wipers operative each independently ot' the other in response to the resistance to such relative movement encountered by engagement of the edges of the wipers with the shoe to impart to the wipers their lateral closing movement.

'7. In a machine of the class described, the combination with shoe positioning means, of a wiper support, end embracing wipers on said support mounted for closing movement laterally of the shoe, means for ei'fecting relative movement of said shoe positioning means and wiper support in a direction lengthwise of the shoe to cause the wipers to operate on the shoe, the wipers being bodily yieldable relatively to the support in response to resistance encountered by their engagement with the shoe, and means responsive to such yield of the wipers to impart'to them their lateral closing movement.

8. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for closing movement laterally of the shoe, means for moving said wipers bodily lengthwise of the shoe to operate them, controlling means to permit said wipers to yield bodily against advancing movement lengthwise of the shoe in response to resistance of the shoe materials and then to continue their advancing movement as the resistance is overcome, and intermeshing toothed members relatively movable in response to such bodily yield of the wipers to impart to said wipers their lateral closing movement.

9. In a machine of the class described, the combination with shoe positioning means, of a wiper support, means for moving said support lengthwise of the shoe, a wiper carrier mounted on said support to permit relative movement between the support and said carrier in directions lengthwise of the shoe, end embracing wipers mounted on said carrier for closing movement laterally of the shoe, and gearing connections operated by movement of said support relatively to the wiper carrier as the support is moved toward the shoe to impart lateral closing movement to the wipers.

10. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for bodily advancing movement lengthwise of the shoe and also for closing movement laterally of the shoe, and rack and pinion mechanism comprising intermeshing toothed members relatively movable in response to resistance of the work to said bodily movement of the wipers to impart lateral closing movement to the wipers.

11. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for bodily advancing movement lengthwise of the shoe and also for closing movement latercomprising 'intermeshing toothed members relatively movable in response to resistance encountered by the wipers in engagement withthe shoe to impart lateral closing movement to the wipers.

12. In a machine of the class described,

the combination with shoe positioning means, of end embracing wipers mounted for bodil'y'movementlengthwise of the shoe and also for closing movement laterally of the shoe, rack and pinion mechanism comprising intermeshing toothed members relatively movable in'response to resistance of the work to said bodily movementof the wipers to impart lateral closing movement to the wipers, and controlling means for said mech anism to cause the wipers to be closed inwardly into substantial conformity to the contour of the edge of the shoe bottom prior to any substantial overwiping action at the end of the shoe.

'13. In a machine of the class described, the combination with shoe positioningv means, of a wiper support, end embracing wipers movably mountedon said support to permit relative movement between the support and the wipers in a direction lengthwise of the shoe in response to resistance of the shoe materials, said wipers being also mounted for closing movement laterally of the shoe, and gearing connections operated by said relative movement between the support and the wipers to impart the lateral closing movement to the wipers.

14:. In a machine of the class described, the combination with shoe positioning means, of a wiper support, means for moving said support lengthwise of the shoe, a wiper carrier movably mounted on said support to permit the support to move relatively to the carrier lengthwise of the shoe in response to resistance of the work to the movement of the carrier, end embracing wipers mounted on said carrier for closing movement laterally of the shoe, pinions mounted on said carrier and connected to the wipers, and means operated by said movement of the support relatively to the wiper carrier to turn said pinions and impart lateral closing movement to the wipers.

15. In a machine of the class described, the combination with shoe positioning means, of a wiper support, means for moving said support lengthwise of the shoe, a wiper carrier movably mounted on said support to permit the support to move relatively to the carrier lengthwise of the shoe in response to resistance of the work to the movement of the carrier, end embracing wipers mounted on said carrier for closing movement 1ater ally of the shoe, pinions mounted on said carrier and connectedto the wipers to impart closing movement to the wipers, and rack bars on said support connected to said pinions to operate them through the movement of the support relatively to the carrier.

16. In a machine of the class described, the combination with shoe positioning means, of a wiper support, means for moving said support lengthwise of the shoe, a wiper carrier movablymounted on said support to permit the support to move relatively to the carrier lengthwise of the shoe in response to resistance of the work to the movement of the carrier, end embracing wipers mounted on said carrier for closing movement laterally of the shoe, pinions mounted on said carrier and connected to the wipers to impart closing movement to the wipers, rack bars on the support connected to said pinions to operate them through the movement of the support relatively to the carrier, and spring means for holding said rack bars normally in stationary relation to said support while permitting them to yield in response to resistance to closing movement of the wipers.

17. In a machine of the class described, the combination with shoe positioning means, of end embracing wipers mounted for relative closing movement laterally of the shoe. pinions connected to said wipers, rack bars connected to the pinions, and means for moving said rack bars lengthwise of the shoe to turn the pinions and impart closing movement to the wipers.

18. In a machine of the class described, the combination with shoe positioning means, of a wiper support movable lengthwise of the shoe, a wiper carrier movably mounted on said support, end bracing wipers mounted on said carrier for closing movement laterally of the shoe, spring means between said support and carrier to render the carrier yieldable against advancing movement in response to resistance encountered by the edges of the wipers, and connections between said support and carrier responsive to such yield of the carrier to impart lateral closing movement to the wipers.

19. In a machine of the class described, the combination with shoe positioning means, of a wiper support movable lengthwise of the shoe, a wiper carrier movably mounted on said support, end bracing wipers mounted on said carrier for closing movement laterally of the shoe, yielding means for normally maintaining said carrier in an advanced position relatively to the support while permitting the carrier to yield against advancing movement in response to resistance of the work, and gearing connections between said support and carrier for imparting lateral closing movement to the wipers proportional to the extent of relative movement of the support and the carrier as the carrier yields.

20. In a machine of the class described, the combination with shoe positioning means, of a wiper support movable lengthwise of the shoe, a wiper carrier movably mounted on said support, end embracing wipers mounted on said carrier for closing movement laterally of the shoe, yielding means for normally maintaining said carrier in an advanced position relatively to the support while permitting the carrier to yield against advancing movement in response to resistance ot' the work, and means dependent upon resistance encountered by the wipers in engagement with the shoe for in'iparting lateral closing movement to the wipers proportional. to the extent of such relative movement of the support and the carrier as the carrier yields, said yielding means being so constructed to control the closing movement of the wipers as to cause them to wipe the upper inwardly at the end and the sides substantially simultaneously.

21. In a machine of the class described, the combination with last and upper positioning means, of means for pulling the upper over the last andfor holding it under tension, end embracing wipers mounted for bodily movement lengthwise of the shoe and for closing movement laterally of the shoe to wipe the upper into lasted position, means responsive to resistance encountered by the wipers upon their engagement with the tensioned upper held by the pulling means for imparting lateral closing movement to the wipers, and means operative in time relation to the operative movement of the wipers to cause said upper pulling means to release the upper.

22. In a machine of the class described, the combination with last and upper positioning means, of meanstor pulling the upper over the last and for holding it under tension, wiper support mounted for movement lengthwise of the shoe, end embracing wipers carried by said support and arranged to yield against advancing movement as their edges encounter the resistance of the upper held by the pulling means and to advance farther ior wiping the upper inwardly at the endol the shoe when said resistance is removed, means operated by continued movement of the wiper support upon such yield of the wipers to close the wipers inward laterally of the shoe, and means for causing said upper pulling means to release the upper when the wipers have been closed into substantial conformity to the contour of the edge of the shoe bottom.

23. In a machine of the class described, the combination with last and upper positioning means, of means for pulling the upper over the last and holding it under tension, a wiper support mounted for movement lengthwiseof the shoe, a wiper carrier movably mounted 011 said support and arranged to yield in response to resistance of the work, end embracing wipers mounted on said carrier for closing movement laterally of the shoe, gearing connections between said support and carrier for closing thewipers in response to yield of the carrier, and means operative in time relation to the movement of the, wipers to cause the upper pulling means to release the upper.

In testimony whereof I have signed my name to this specification.

CHAR-LES F. PYM.

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