US2251396A

US2251396A - Lasting tool

Info

Publication number: US2251396A
Application number: US328852A
Authority: US
Inventors: Casavant Ernest
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1940-04-10
Filing date: 1940-04-10
Publication date: 1941-08-05
Anticipated expiration: 1958-08-05

Description

g 5, 1941- E. CASAVANT 2,251,396

LASTING TOOL Filed April 10, 1940 Patented Aug. 5, 1941 LASTING TOOL Ernest Casavant, Brockton, Mass, assignor to i United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application April 10, 1940, Serial No. 328,852 7 4 Claims.

This invention relates to lasting means and is herein illustrated in its application to hand lasting pincers of the type illustrated, for example, in United States Letters Patent No. 2,096,738, granted October 26, 1937, on an application of Sidney J. Finn. This type of pincer comprises crossed levers the longer ends of which are formed as handles for operating the pincer and the shorter ends of which are formed as gripper aws.

In lasting uppers of the prewelt type, it is usual to employ hand lasting pincers at various stages in the lasting operation and it has been found desirable to provide for this purpose a lasting pincer having jaws adapted to grip the lasting margin without misplacing the sole attaching extension of the welt. The provision of such a lasting pincer is particularly desirable for use in the manufacture of prewelt shoes of the type illustrated and described, for example, in United States Letters Patent No. 2,119,801, granted June 7, 1938, on an application of William C. Vizard, since in shoes of this type the welt is operated upon prior to the lasting of the upper to cause its sole attaching extension to be directed outwardly :i.

from the upper to facilitate the sole attaching operation.

It is an object of the present invention to provide a hand lasting pincer adapted to operate on prewelt uppers without misplacing the sole attaching extension of the welt and accordingly, this invention consists in the provision in a hand lasting pincer of the type above described of an outer gripper jaw having an enlarged end portion provided with a recess opening toward the inner gripper jaw and constructed and arranged to receive an outwardly projecting sole attaching extension of a shoe upper and having a gripping surface between said recess and the end of the In order to obviate the occurrence of objectionable gripper marks in the outer surface of the upper, this invention in another aspect thereof consists in the provision in the outer gripper jaw of a smooth gripping surface adjacent to the recess provided in said jaw.

The invention will now be described with reference to the accompanying drawing, in which Fig. 1 is a side elevation illustrating a hand lasting pincer embodying the features of the present invention;

Fig. 2 is an enlarged view in side elevation showing the jaws of the gripper in operation on a prewelt upper of the type disclosed in the Vizard patent above referred to, a portion of the upper, and of a last and insole being shown in section; and

Fig. 3 is a fragmental plan view illustrating the operation of the pincer on the upper in tensioning the upper in the direction of the length of the welt.

Referring to Fig. l, the illustrated hand lasting pincer comprises crossedlevers Hi and I2 pivotally connected by a halved joint M' the short'ends of said levers being curved downwardly and having formed therein'an inner gripper jaw l6 and an outer gripper jaw It. 'In its general organization, the illustrated pincer "is similar to the hand lasting pincer illustrated and described in the patent to Finn above referred to. In common with the lasting pincer of the Finn patent, the pincer herein illustrated is provided with a fulcrum member 25 constructed and arranged to bear against the margin of a last bottom or an insole thereon. The fulcrum mmber is pivoted between downward extensions of a member 2|, swiveled in an enlarged portion 25 of the lever I!) on an axis perpendicular to the longer side oi said enlarged portion.

The outer jaw I8 has an enlarged end portion 23 which is provided with a notch 22 extending from the gripping surface of said jaw outwardly, the lower wall of the notch being substantially parallel to the welt of a prewelt upper on which the pincer is arranged to operate (Fig. 2) That portion of the outer gripper jaw extending downwardly from the notch 22 has a smooth gripping surface 2% which, as shown in Fig. 2, bears against a grain flap 26 of a special welt of the type provided in the shoe of the Vizard patent above referred to, said flap 26 serving to attach the welt to an upper 28.

In the operation of the illustrated pincer (as shown in Fig. 2) the fulcrum member 2!] is located on the margin of an insole 30 on a last 32 and the jaws are swung downwardly in an open position, which is normally maintained by a spring 34, to position them relatively to the welted margin of the upper 28. As the jaws are closed, the smooth gripping surface 24 of the outer jaw l8 grips the welted margin of the upper against the lower portion of the inner jaw l6 while the upper portions of the jaws act against an insole attaching extension 36 of the welt. After the jaws have been closed, the pincer is swung heightwise of the upper about the fulcrum member 20 and while the upper is held under heightwise tension the pincer is swung longitudinally of the upper (Fig. 3) about the swivel member 2| to tension the Welted margin of the upper lengthwise thereof as may be required. I While the position of the pincer heightwise of the upper and longitudinally of the welt is maintained to hold the tensions imparted to the upper, the pincer is moved bodily in a direction to bring the upper in against the last and then, while the workman holds the upper in position on the last with one hand, the insole attaching extension 36 of the welt is attached to the margin of the insole. One convenient way of securing the welt to the insole consists in applying cement to the margin of the insole and to the insole attaching extension of the welt and pressing or pounding said extension against the margin of the-in sole. For pounding said extension against the insole the outer gripper jaw I8 is provided with an upper extension 38 which serves as a hammer head when the pincer is inverted, the handles. of the pincer in this case serving as the handle of the hammer.

While the illustrated pincer is herein shown inoperation on a prewelt upper of the type illustrated in the Vizard patent above ref-erred to, it will be'understood that the pincer may also be employed in the manufacture of other types of shoes, the uppers of which have outwardly extending sole attaching'margins.

Having thus described my invention what I claim as newand desire to secure by Letters Pa tent ofthe United States is:

1. In a handlasting pincer of the type comprising crossed levers the' longer endsof which serve as handles and the shorter ends of which are-formedas gripper jaws, agripper jaw having an enlarged end portion provided with a recess opening toward the other gripper jaw and constructed: and arranged to receive an outwardly projecting sole-attaching extension of a shoe upper and having a gripping surface between said recess and the end of the jaw.

2. In a hand lasting pincer of the type comprising crossed levers the longer ends of which serve as handles and the shorter ends of which are formed as inner and outer gripper jaws, respectively, an outer gripper jaw having an enlarged end portion provided with a welt-receiving recess which opens toward the inner gripper jaw, and provided with a smooth gripping surface between said recess and the end or the jaw.

3-. A hand lasting pincer of the type comprising crossed levers the longer ends of which serve as handles and the shorter ends of which are formed as inner and outer gripper jaws, respectively, characterized by the provision of' a smooth gripping surface in the outer gripper jaw, and a cooperating toothed gripping surface in the inner gripper jaw, the outer gripping jaw being provided with a welt-receiving recess adjacent to said smooth gripping surface.

4. In a hand lasting pincer of the type comprising crossed levers the longer ends of which serve as handles and the shorter ends of which are formed as inner and outer gripper jaws respectively, an outer gripper jaw having an enlarged end portion provided with a welt-receiving recess which opens toward the inner gripper jaw, and provided with a smooth gripping surface between said recess and the end of the jaw, said outer gripper jaw having an extension adjacent to the fulcrum of the levers directed away from the inner gripper jaw.

ERNEST CASAVANT.