US2153832A

US2153832A - Shoe insole

Info

Publication number: US2153832A
Application number: US176957A
Authority: US
Inventors: Gutwein Theodore
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-11-29
Filing date: 1937-11-29
Publication date: 1939-04-11
Anticipated expiration: 1956-04-11

Description

- T. GUTWEIN April 11, 1939.

SHOE INSOLE Filed Nov. 29, 1957 INVENTOR.

, THEODORE Gum/5w H/S ATTORNEYS,-

Patented Apr. 11, 1939 UNITED STATES PATENT OFFICE- 3 Claims.

This invention relates to a combination insole and filler for a shoe.

The object of the invention is to provide a combination insole and filler of fabric and sponge rubber which will be eflicient in use, lenditself to the economical manufacture of a shoe for which it is provided, and which will be economical to manufacture. The device is intended to replace the conventional leather insole and cork filler.

Specific objects will be apparent from the following detail description of a specific embodiment of the invention, taken in connection with the accompanying drawing, while the invention comprises the elements and their combinations specifically pointed out in the appended claims.

Claims directed to a shoe having a filler element of the character herein described are included in' my copending application Serial No. 176,956, filed November 29, 1937.

Fig. l is a view showing a sheet or filler material and a method for producing a blank. I

Fig. 2 is a view showing the blank of filler material and a method of preparing the blank for incorporation in the completed insole.

Fig. 3 is an enlarged cross section on line 3-3, 1

Fig. 2. r

Fig. 4 is a plan view of an insole embodying the invention with some of the parts rolled, better to illustrate the construction.

Fig. 5 is a cross section on line 5-5, Fig.4.

A sheet of filler material is first prepared by vulcanizing a fabric to one side of a sheet of sponge rubber. Thus by heat and pressure the rubber impregnates the fabric and the fabric is substantially embedded in the rubber. While it is to be understood that this invention is not limited to any particular thickness of sponge rubber nor to any weight or grade of fabric, a more particular description of materials may be made to assist in understanding and practicing the invention. The sheet of sponge rubber is preferably or $4; inch in thickness, although for some purposes thicker material may be de sired, but thinner material will seldom if ever be used. It has been found that cotton duck of a weight of 9% ounces to the yard is a satisfactory fabric for the purpose.

Fig. 1 illustrates a sheet of prepared filler material with the sponge rubber designated by the numeral I and the fabric by the numeral 2. The operation of vulcanizing the fabric to the rubber so intimately associates the fabric and the rubber, with the impregnationof the rubber into the interstices of the fabric, that when-viewed from riphery of the member.

the fabric side the duck has the appearance of cheesecloth.

A clicker die D may be used preferably to die out the blank from which is formed a filler strip or member. The contour of the blank will conform to the shape and size of the insole pattern of a particular shoe for which the insole is intended.

Fig. 2 illustrates a blank undergoing a trimming operation, by which a strip of rubber is removed "or skived from the periphery of the blank, leavprovided having a layer of sponge rubber intimately associated with or substantially embedding the layer of fabric,- with a wing or strip of rubberized fabric extending outwardlyabout the me- The completed insole includes the filler member described, having a sponge rubber layer l superimposed upon and vulcanized to a layer of fabric 2 with an attaching wing 3 of rubberized fabric extending outwardly from the sponge rubber, and a top layer 5 and a bottom layer 8 of the fabric. The layer 5 is intendedfor the inside of the shoe while the layer 6 is intended for the sole side of the shoe.- The filler member is arranged with the fabric 2 adjacent the fabric 5. The three parts described, that is, the filler member, the fabric 5 and the fabric 6, may be secured together by cement. Preferably, they are also connected by a double line of stitches l passing through the three parts along the strip 3.

While the invention is not limited to a particular material or grade of material, a more particular'description of satisfactory components may assist in understanding and practicing the invention. A material known as airplane fabric, first treated with Dupont dope, has been found desirable for the layer 5. This material is such as is used and specified by the Army and Navy regulations for use in the wings and fuselages of airplanes, and is a material which is very tightly woven and with many threads to the inch.

The dope referred to is the same as that used in the treatment of such materials for airplane uses and adds to the strength and stiflness of the material. This particular cloth is recommended for the inside of the insole because it provides a smooth surface for the foot and at the same time has the required strength and stifiness.

A material well known as Army duck. which also may be treated by Dupont dope..has been found desirable for the layer 8.

The insole may have perforations passing through some or all of the layers.

The method described for preparation of the filler member is particularly desirable in the combination here disclosed for several reasons. It provides means for incorporating a sponge rubber filler into an insole' and atthe same time the layer of fabric, stiffened and strengthened by its impregnation with rubber, gives the required stillness and strength necessary for the article. This stiffness and strength is also inherent in the attaching wing or strip 3 of the flller member.

Various changes may be made in the details of construction, within the scope of the appended claims, without departing from the spirit of this invention. Parts of the invention may be used without the whole and various additions may be made to the simple construction herein illustrated and described while retaining the advantages of the invention.

I claim:

1. A combined insole and filler comprising a cushion member consisting of a layer of sponge rubber, superimposed upon and vulcanized to a layer of fabric, the sponge rubber being smaller in extent than the layer of fabric, whereby a wing of fabric is provided about and beyond the sponge rubber; and one or more layers of stiffening material corresponding to the insole pattern of a shoe superimposed upon and secured to the cushion member.

2. A combined insole and filler comprising a cushion member consisting of a layer of fabric and a layer of sponge rubber smaller in extent than the layer of fabric with the fabric substantially embedded in the rubber throughout the extent of the sponge rubber layer, whereby a wing of fabric about and beyond the sponge rubber is provided, and layers of fabric attached to the two sides of said member respectively.

3. A combined insole and filler comprising a cushion member consisting of a layer of rubberized fabric corresponding to the insole pattern of a shoe and a layer of sponge rubber smaller in extent than the layer of fabric superimposed upon the fabric and integral with the rubber of the fabric throughout the extent of the sponge rubber,- whereby a wing of rubberized fabric is provided beyond and about the sponge rubber, one or more layers of fabric co-extensive with and superimposed upon said cushion member, and two spaced lines of stitches extending through the wing and said last mentioned layers of fabric.

THEODORE GUTWEIN.