US2484289A - Apparatus for use in attaching soles to the uppers of boots and shoes - Google Patents

Description

Oct. 11,1949. E. A. HAMMARSJO 2,484,289

A RATUS FOR USE IN ATTACHING SOLES THE UPPERS 0F BOOTS AND SHOES Filed Nov. 28, 1945 2 Sheets-Sheet' 1 2,484,289 NG SOLES SHOES E. AMMARsJO APPARATUS F0 SE IN ATTACHI TO THE UP ER OF BOOTS AND Oct. 11, 1949.

2 Sheets-Sheet 2 Filed Nov. 28, 1945 Patented Oct. 11, 1949 TNT OFFIC APPARATUS FOR USE I TO THE UPPERS OF BOOTS N ATTACHING SOLES AND SHOES Erik Algot Hammarsjii, Stockholm, Sweden, as

signor to Eifon 8; Co Ltd Aktiebolag, Stockholm, Sweden,

a corporation of Sweden Application November 28, 1945, Serial No. 631,253 In Sweden December 12, 1944 7 Claims.

1 The invention relates to apparatus for attaching soles to boots and shoes by means of a cement or other adhesive. For this purpose it is necessary to subject the shoe and the sole to pressure between a last and a pad for a predetermined time until the cement has set. It is desirable that the pressure should be evenly distributed over the surface of the sole and it is of particular importance that an adequate pressure is applied to the outer edges of the sole..

Pads of various kinds have been suggested and the invention relates in particular to pads of the type which are hollow and filled with a. fluid, preferably a liquid. In one construction of this type the upper wall, preferably also the lower wall, is made of a massive elastic material such as India rubber, and the inner surfaces of the walls are so near each other that a slight downward pressure forces. the. upper wall into contact with the lower wall, the pressure over substantially the whole area of the sole being exerted by the massive but elastic material of the pad, forcing the sole against the shoe. A pad of this type may be made in one piece from die-cast India rubber; it is easy to handle and does not require any complicated devices for the attachment thereof to the support.

As support for such a pad a box may be used having substantially the same shape as the pad.

A hollow pad of this type functions well under most circumstances. If, however, the shoe is relatively large compared with the upper surface of the pad it has been found that the pressure exerted at the edges is not always what it should be. It is an object of this invention to overcome this difiiculty by shaping the support or the pad or both so that the pressure at the edges of the sole or at certain parts of the edges is increased. For this purpose the support at the edges of the pad may have raised portions or the pad at, the

edges thereof may have raised portions on the under or the upper side. These raised portions serve to cause the outer massive edges of the pad to exert a greater pressure on the edges of the sole than at the central part thereof.

In the accompanying drawings Figs. 1-5 show one embodiment of the invention and Fig. 6 another. Fig. 1 shows a top plan View of the support, Fig. 2 a section on line A--B in Fig. 1, Fig. 3 a similar section with the pad in place in the support, Fig. 4 a longitudinal section through the device, a lasted shoe being placed on the pad and pressure applied by means of a pressure member, Fig. 5 a corresponding cross section, and Fig. 6 a section through the modified form of the support and the pad.

In the figures I denotes the support, 2 the pad, 3 the last and A the pressure member.

The support I rests on two ribs 5 and at the rear end has a portion 6 sloping upwards in order to conform to the instep portion of the shoe. The support is further provided with an upstanding wall 1 inside which the pad is placed. In the prior constructions the support has had the shape shown in Fig. 6, the side walls rising from the plane bottom at right angle-s thereto. As shown in Figs. 1-5, however, thesupport at the longitudinal edges thereof has raised portions 8, forming ledge's'Il on which the pad rests as shown in In Figs. 4 and 5, It denotes the outsole or wearing sole which is to be attached, I I the full sole, I2 the insole and It the upper which in the shoe shown in Fig. 4 is assumed to be secured between the insole and the full sole by means of cement.

The upper face of the last is plane and the pressure applying member is adapted with its fore end to press against the last on the outside of the upper by means of a cross member I5 covered with leather I4.

When pressure is applied the middle portion of the upper wall of the pad is pressed downwards as shown in Figs. 4 and 5, whereas the massive edge portions thereof resting on the raised portions 8 cause a substantial increase of the pressure at the edges of the sole. The last does not fill up the shoe at the place where the cross member I5 acts on the last and therefore the upper at this place is not under tension so that the pressure is exerted over the whole underside of the member I5 and the upper is not harmed.

In the embodiment shown in Fig. 6 the pad at the longitudinal edges has depending portions I6 which have the same effect as the raised portions 8 of the support.

Various modifications are of course possible within the scope of the invention. The raised portions 8, It or other devices having a similar effect may be distributed in various ways along the periphery of the pad so that an increase of the pressure is obtained at those places where such an increase is desired, thus also at the fore and/or rear end of the pad orthe whole way around the edges of the sole. Instead of the shape shown in Figs. 1-5 the support may have the shape shown in Fig. 6 and at those places where an increase of the pressure is desired it may be provided with inserted three-cornered ribs so as to giv the internal shape shown in Figs. 1-5. The support may be made of wood, metal, for example aluminum, Bakelite or other suitable materials. It is also possible to combine the constructional features described and shown, 1. e. to provide the support with raised portions and the pad with depending portions.

What I claim is:

1. In apparatus for attaching soles to shoes, a base member for supporting the sole comprising in combination a hollow liquid filled pad of flexible elastic material having a lower wall, an upper wall normally spaced apart, from said lower wall, and massive side walls, and a support for said pad normally engaging and supporting said pad along only the lower longitudinal edge portions thereof.

2. In apparatus for attaching soles to shoes,

a base member for supporting the sole comprising a hollow liquid filled pad of flexible elastic material having massive side walls and an upper wall normally spaced apart from a lower wall, and a support member for said pad normally supporting said pad only in the vicinity of the lowermost and outermost longitudinally extending portions of said pad. l

3. Apparatus as defined in claim 2 wherein the only portions of said support which normally support said pad comprise raised portions adjacent the longitudinal side walls of said support.

4. Apparatus as defined in claim 2 wherein the lowermost and outermost longitudinally extending portions comprise depending portions of said pad substantially coextensive with and adjacent j the longitudinal edges thereof.

5. In apparatus for attaching soles to shoes, a base member for supporting the sole comprising a hollow liquid filled pad having an upper wall, a. lower wall, and massive side walls formed of a single piece of India rubber, the inner surface of said upper wall being normally spaced apart from but in suificient proximity to the inner surface of said lower wall that said surfaces will contact when downward pressure is exerted upon said upper wall, and a substantially rigid support member for said pad, said support member having side walls within which said pad is positioned, and said support member normally supporting said pad only along the longitudinal lowermost and outermost portions of the lower wall thereof.

6. Apparatus as defined in claim 2 wherein the contacting portions of said support comprise ledges formed on the side walls of said support.

7. In apparatus-for attaching soles to shoes,

abase member forsupporting the sole comprising in combination a hollow liquid filled pad of flexiblev elastic material having a lower wall, an upper walLnorrnally spaced apart from said lower wall, and massive side walls, and a support for said pad having side walls within which said pad is positioned, the longitudinal portion of said lower wall of said pad intermediate the sidewalls thereof being normally spaced apart from said support.

. ERIK ALGOT HAMMARSJG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number

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