US1966462A - Machine for effecting relative movement between lasts and shoes - Google Patents

Description

G.A.PERNNS,JR

July -17, 1934.

MACHINE FOR EFFECTING RELATIVE MOVEMENT BETWEEN LASTS AND SHOES Filed June 24, 1933 Patented July 17, 1934 OFFICE" M A Hr N E 1 FOR EFFECTING: RELATIVE M O V'E ME N'Tj SHOES BETWEEN LASTS AND George A. Perkins, Jr., Lynn, Mass, asjsignor. to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application June 24, 11933, Serial No.- 677,380

6 Claims. (or g-45.1)

i -This invention relates to machines for effecting relative movement between lasts and shoes and is herein disclosed as embodied in a machine provided with a rotary member which engages the shoe frictionally to remove the shoe from a-last. v For an illustration of an earlier machine of this general type reference may be had to United States LettersP-atentNo. 1,820,952, granted Sep tember '1, 1931 upon the application of- John M';'Whe1 ton and Arthur F." Pym." The rotary shoe engaging member disclosed in that patent consists -of-'-a solid rubber covered roll of relatively small diameter. Such-machines are being used extensively to remove shoes from'lasts.

'-An object of the present invention is :to provide an improvedmachine of the character under consideration.' In accordance .with a feature ofthe invention, the shoe-engageable :26 member is made inflatable. Because of its 'resilientyielding propertiesan inflated member will conform, under relatively light pressure, to the shape of that portion of the shoe which it engages, and will thus develop a relatively great area of frictional contact with the shoe. Only a relatively light pressure against the inflated member, therefore, is required to effect a frictional force sufiicient to move the shoe without slipping, and the wear of the inflated member is, accordingly, relatively slight for each operation. In the illustrated machine the inflated member is arranged for rotary movement. An ordinary vehicle wheel carrying an inflated tire upon its periphery may conveniently be used, in accordance with a further feature of the invention, as the inflated shoe-engaging member or roll. Such wheels and tires are cheap and readily obtainable. Because of the relatively large diameter of such a wheel, the total wear resulting from a number of operations is distributed over a large area, so that frequent renewal of the tire is unnecessary. The large diameter of such a wheel further insures a greater extent of contact, circumferentially of the wheel, than could be obtained with the same pressure by using a roll of relatively small diameter, a factor which tends still further to reduce the necessary pressure against the tire and therefore to prolong the useful 59 life of the tire. A work support having a last pin upon its free end is preferably used for bringing the lasted shoe into engagement with the tire. In the illustrated machine, this work support is pivotally mounted and is operated by a treadle.

These and other features ofthe invention,

' including certain details of the construction and combinations of parts, will be more fully ex-' plained .in the following description to be'read inrel'ation to the accompanying drawing, *in 00 which Fig. 1 is a perspective .viewlof the improved machine; and I Fig'. 2 is a view in side" elevation of a'portion of the machine shown in Fig. .1.

I Referring. to thedrawing, thev supporting structure of the machine consists of a base or platform 10 upon-which is'mounted a table '12. Journaled in bearings 14 whichare secured I upon the table 12 isf'alshaft 16; Secured upon 70 one end of the shaft 16 .-is a"pulley 18 around which pass'esa belt 20. Fixed upon the base 10 is a bearing 22 for a shaft 24' which. may be driven from any suitable source of power. A pulley 26, which is mounted upon the shaft 24 76 drives the belt and thereby drives the-shaft 16. :Upon the opp'osite end'of the shaft 16 is mounted a wheel 28 carrying upon its periphery an inflatable tire 30. The wheel 28 of the illustrated machine is an ordinary automobile 30 wheel and the tire 30 is an ordinary automobile tire consisting of an inflatable inner tube (not shown) and an outer casing. The inner tubing may be inflated through a. Schroeder valve 32. An air pressure of about twenty pounds to the square inch proved satisfactory upon trial.

A fulcrum pin 34 is supported by a bracket 36 which depends from the table 12. Pivotally mounted upon the pin 34 is a lever 38 which carries at its upper end a last pin 40. Extending from the lever '38 and rigidly secured there- 7 to is an arm 42. A treadle 44 is fulcrumed upon a pin 46 which is carried in a bracket 48 secured upon the base 10. A link 50 connects the treadle 44 and the arm 42, whereby movement of the treadle will swing the lever 38 about its fulcrum. The link 50 is made, for purposes of lengthwise adjustment, in two parts, both of which parts are adjustably secured toa block 52 by set screws 54. The lower end of the link 50 is pivotally connected by a pin 55 to the treadle 44. The upper end of the link 50 is pivotally connected by a pin 56 to a block 58; and the block 58 is pivotally connected by a pin 60 to the arm 42. The pins 56 and 60 are at right angles to each other. This, arrangement, provides for universal pivotal movement between the link 50 and the arm 42. A coil tension v spring 62 has its upper end anchored in the bracket 36 and its lower end secured to the treadle 44 for holding up the treadle.

In operation, a last L having a shoe S mounted thereon is placed upon the last pin 40 with the heel end of the shoe S adjacent to the rim of the tire 30. The operator then depresses the treadle 44 causing the lever 38 to swing toward the tire 30 and to bring the heel end of the upper of the shoe into engagement with the tire. The upwardly moving portion of the tire engages the shoe frictionally and lifts the heel end of the shoe from the last. In order to provide against any liability of the last being drawn upwardly off the last pin as the heel end of the shoe is raised, the last pin 40 is inclined toward the plane of tangency between the shoe and the tire. This inclination, which amounts to about five degrees, appears in Fig. 2. United States Letters Patent No. 1,820,952, above referred to, discloses a similarly inclined last pin. Where a hinged last is employed the movement of the shoe may be suflicient to break the last, but it is frequently desirable for the operator to assist in this breaking action by pressing down upon the forepart of the sole of the shoe while the heel portion is being raised, as shown in Fig. 2.

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

1. A machine for effecting relative movement between shoes and lasts, comprising a support for a last, an inflated member adapted frictionally to engage a shoe, and means for effecting relative movement between said last support and said inflated member to cause a shoe on the last to be engaged by the inflated member and thereby to be moved relatively to the last.

2. A machine for effecting relative movement between shoes and lasts, comprising a support for a last, and a driven inflated roll, said last support and said roll being mounted for relative movement to effect engagement between said roll and a shoe on a last on said last support, whereby the driven roll will move the shoe relatively to the last.

3. A machine for effecting relative movement between shoes and lasts, comprising a support for a last, a driven inflated roll, and means for causing relative movement between said last support and said roll to effect engagement between a shoe on the last and the roll and thereby to move the shoe relatively to the last.

4. A machine for effecting relative movement between lasts and shoes, comprising a pivotally mounted support for a last, a rotary inflated member adapted frictionally to engage a shoe, means for driving said rotary member, and means for swinging said last support about its pivotal mounting to cause a shoe on the last to be brought into engagement with said inflated member whereupon the rotation of said inflated member against the shoe will move the shoe relatively to the last.

5. A machine for removing shoes from lasts, comprising a pivotally mounted support for a last, a wheel carrying upon its periphery an inflated tire, means for driving said wheel, and means for swinging said last support toward said wheel to bring the counter portion of a shoe on the last into engagement with the tire whereupon the rotation of the tire will move the rear portion of the shoe off the last.

6. A machine for effecting relative movement between shoes and lasts, comprising a driven inflated roll, and means for presenting a shoe on a last to said roll while preventing the last from partaking of the movement of the roll, whereby the frictional engagement of the roll with the shoe will move the shoe relatively to the last.

GEORGE A. PERKINS, JR.

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