US2090410A - Insole for shoes - Google Patents

Description

Aug. 17, 1937. CLIFFORD 2,090,410

INSOLE FQR SHOES F'iled Oct. 27, 1936 8. Pyroxylin Cocflings Rubber \mpregnuTed.

Fibrous SheeT Mu'reriol Gum: Perchu Film Insole lnvenror. James U. Cli Fford b way-WW Aflys.

Patented .Aug. 17, 1937 .lames J. Clifford, Reading, Stedfast Rubber Company,

Mass assignor to Inc., Mattapan,

Mass., a corporation of Massachusetts Application October 27, 1936, Serial No. 107,805

1 Claim.

This invention has for its object to provide an insole for that type of womens shoes wherein the edge of the insole is exposed to view and which are generally known as open shank shoes.

Womens shoes have for many years been very largely made in a form in which substantial or major portions of the upper are cut away or omitted, leaving the shank of the shoe and other portions of the sole exposed to view. This leaves the insole which forms a structural part of the shoe with its edges at the open portions of the upper at the shank and elsewhere exposed to view. But the edges of an insole, particularly when made of fibrous compositions, now extensively employed for that purpose, are not of a character to present a pleasing and desirable appearance and in the ordinary type of shoes where the upper is complete are concealed from view.

It has been a diflicult problem to provide an insole for these open shank shoes, the edges of which shall present a finished, durable and pleaslng appearance and this is all the more important because the very nature of open shank or womens cut-out shoes is such as to attract attention.

The present invention presents an insole in which the edge is protected against wear; which would tend further to render the edge unsightly, and which presents an exposed pyroxylin surface of any desired color and, further, an insole which may be economically manufactured.

The nature and objects of the invention will appear more fully from'the accompanying description and drawing and will be particularly pointed out in the claim.

'In the drawing: ,2

Fig. 1 illustrates in erspective a typical example of a womans cut-out or open shank shoe, together with an insole therein embodying the present invention. 40 Fig. 2 is ajplan view of the insole.

Fig. 3 is an enlarged and distorted illustrative cross section of the edge portion of the insole taken on the line 3-3 of Fig. 2.

It will be seen from Fig. 1 that with an open shank or cut-out shoe, the edge of the insole is distinctly visible at the shank l and at various points such as 2-, cut away.

The bodv l of the insole may be of any suitable 50 shape and formed of any suitable material, including the sheet materials of fibrous composition so largely employed in insole manufacture. The'peripheral edge of these insoles is unsuitable for outside exposure in a finished shoe. This edge 55 is more or less rough and fibrous by nature and the exposed surface sheet material has been thus as shown in the drawing, being readily conformed will preferably extend 3-, l, 5, and 6, where the upper is poses," it will does not-readily take a finish such as is given to of the upper. Furthermore, it is readily roughened by wear or abrasion and more or less readily absorbent to foreign matter, and thus readily soiled. 5

In the present invention a binding tape 8 of suitable fibrous sheet material is-provided. This tape may be made of materials such as employed in unwoven fibrous sheets, of cotton fibres or fibres employed in paper manufacture. The fibrous sheet material of this tape is impregnated with a rubber solution which may be either a natural or an artificial aqueous solution or an organic solution of rubber. After the fibrous impregnated and dried, that surface which is to form the exposed or outer surface is then coated by any of the usual coating processes with several coats of pyroxylin of the desired color to harmonize with the shoe. The other or inner surface of the sheet material is then coated with a gutta percha compound which-has the inherent characteristic of being rendered adherent by heat.

The binding tape when completed is of a width required to bind the edge' of the insole and presents throughout its exterior or exposed surface the pyroxylin coating properly colored and throughout its inner surface a film of the gutta percha compound. v This tape is then applied to the insole by any suitable means andas it is being applied, or just previously thereto, it is subjected to heat, which brings out the inherent gutta percha film and renders it adherent to the material of the insole as well as to the binding tape itself. The binding tape is pressed against the peripheral edge of the insole and overlies both 7 surfaces of the insole adjacent said edge and thus surrounds and fits against the edge of the insole,

to the contour of the insole in a smooth and unwrinkled condition. 0 The tape need only extend aroundthat por- .tion of the edge of the insole exposed to view butsubstantially throughout the entire edge of the insole except the heel portion, as shown in Fig. 2. i

When the insole is completed, as, illustrated in Fig. 3 which is distorted for illustrative purnated fibrous sheet material of the binding tape with its exterior pyroxylin coating surrounds and fits against the edge of the insole and overlies I the surfaces of the insole adjacent the edge and that the film of gutta percha compound adhercharacteristic of the,

be seen that the rubber-impreg ently engages and secures together the tape and ing tape of rubber impregnated fibrous material "the edge and surfaces'of the insole, thus causing having an exterior pyroxyiin coating, the said the edge of the insole wherever exposed to view binding tape surrounding and fitting said edge, in the finished shoe to present a finished, durable overlying the surfaces of the insole adjacent said 5 edge o pleasing appearance and harmonizing edge, and a film of gutta percha compound which 5 with the shoe. is characteristically rendered adherent by heat Having thus described the invention, what is adherentiy engaging and securing together the claimed as new and desired to be secured by Lettape and said edge and surfaces and causing the ters Patent, is: insole where exposed in the finished shoe to pre- 7 10 An insole for open shank shoes comprising a sent a finished, durable edge of pleasing appear- 10 sheet of fibrous material of the required shape, ance.

' size and thickness having an edge unsuitable for outside exposure in the finished shoe and a bind- JAMES J C I FOR

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