US2036066A - Method of making cemented shoes - Google Patents

Description

March 31, 1936. c. MILLER METHOD OF MAKING CBMENTED SHOES Original Filed Nov. 27, 1933 m a a INVENTOR. CHARLES MILLE BY 2 wu Mb ATTORNEY.

Patented Mar. 31, 1936 UNITED STATES PATENT OFFICE Original application November 27, 1933, Serial No.

699368. Divided and this application November 20, 1935, Serial No. 50,717

2 Claims.

This application is a division of my copending application Serial No. 699368, filed November 27, 1933, for Cemented shoes and method of making the same.

The invention relates to cemented shoes.

When shoes having straps as parts of the upper have been made under the cemented shoe processes of the prior art, considerable difliculty has been experienced in properly cementing the outsole at those portions Where the said straps are lasted to the insole.

It is therefore an object of this invention to devise a method, of making cemented shoes having straps as a part of the upper thereof, in

' which the outersole is uniformly cemented to the shoe And it is a further object of this invention to prepare an outsole for use in a cemented shoe so that the same may be firmly attached to the shoe, and permit of a finished product having all the outward appearances of a turned shoe.

Finally, it is an object of this invention generally to improve the cemented shoe art and to produce cemented shoes which are durable, and Stylish and which have all the desirable characteristics of turned shoes.

These and other objects of the invention will be readily apparent to those skilled in the art from the following description taken in conjunction with the accompanyng drawing in which:

Flgure 1 is a perspective View of a shoe partially completed, the outsole being omitted.

Figure 2 is a perspective view of an outsole prepared for attachment to the shoe shown in Figure 1.

Figure 3 is a, sectional view taken along the line 3-3 of Figure 1.

Figure 4 is a sectional view taken along the line 4-4 of Figure 2.

Figure 5 is a detail view of a shank stifl'ener having a covering.

The present invention is disclosed specicaliy as applied to a so called Sbicca method shoe, such as is disclosed in U. S. Letters Patent 1,838,70B issued to Frank Sbicca and U. S. Letters Patent 1,902,725 issued to the same inventor. However, it must be Strictly understood that the present invention is not so limited and that the same may also be applied to any cemented shoe in which separate insole and outsole members or their equivalents are used.

Referring in detail to the drawing the shoe ID having an upper l l provided with strap members I2 forming a part of the vamp, and strap members l3 forming a part of the quarters and counter section, is lasted to the insole !4, which has previously been mounted upon the last !5 shown in dotted lines in Figure 1. This insole M is providea with a rand Ma. forming the forward portion, a shank portion Mb and a heel portion l4c. Mounted upon the shank portion Mb by tacks !6 is a shani: stiffener ll having an arouate section !8 running lengthwise thereof. A fabric sheath or covering !9 surrounds the Stiftener Il. leather 20 are cemented to the shank portion with one edge abutting the stifiener. The strips 20 abut against the stifiener and extend from a point adjacent to the heel breast down to the end of the stiffener. The thin edge of the strips runs a little inside of the side edges of the shank portion as shown in Figures 1 and 4. These strips together with the stiffener ll and its sheath 18 form a substantially convex surface on the shank portion of the insole. The sheath, after it is mounted upon the stiffener is saturated with a cement having a cellulose nitrate base and which readily becomes tacky upon the application oi a suitable solvent.

Referring now to Figure 1, will be seen that the spaces between the straps !2 are free of the upper of the shoe. consequently when the outsole is attached, it must be cemented to the insole member Ma at the intermediate points, but the edges of the straps which come in contact with the sole will keep the same out of contact with the insole member Ma at the said intermediate parts. This not only results in an unsightly shoe, but the same is substantially Weaker due to the incomplete cementing of the outsole. To overcome this defect, small leather wedges, 22 substantially triangular in shape are inserted between the edge of the last and the rand Ma., (Fig. 1). These wedges 22 are just wide enough to fit in between the straps |2 and are as thick as the straps l2. Now, when the outsole is placed on the shoe, and pressure is applied to cement the same in place, the leather wedges 22 bring the rand l4a into contact with the outsole, and permit these portions to be cemented to the outsole. Of course, for different styles of the upper the space between the straps will vary, and the wedges 22 are prepared to fit the particular shoe in which they are to be used Upon completion of the shoe, and withdrawal of the last, the wedges fall out, and may either be used again or thrown away.

The filling of cementitious material is levelled off fiush with the inturned edges of the upper in the heel seat lasting. This cement is of the Pre-formed wedge shaped strips of 10 above mentioned type and hardens to form a firm foundation for the mounting of the heel.

The Shoe is now ready for the application of the outsole which is first prepared as follows:

The properly shaped outsole member 30, having a raised ball section SI as described in the aforementioned Sbicca patents, is grooved at 32 to receive the shank stiifener l'l mounted on the insole, and to embrace the same firmly when the outsole is pressed onto the shoe. Along the edge of the shank portion of the outsole on both sides thereof, there are provided bevelled edges 33, concave in cross section and extending substantially from the ball line to the heel b reast. The edge of this bevel is colored the same as the upper of the shoe to` which it is to be applied. The sole is now coated over those portions which are to contact With the lasted edge of the upper, the edge of the rand, and the shank portion of the insole with a cement such as is now commonly used in cemented shoes, and the cement is allowed to dry.

Before the sole is laid, the cemented surface is made tacky, following which the sole is put in place upon the shoe, and pressure is applied to fix the same properly in position.

The pressure applied to the outsole brings the same firmly into contact With the lasted edge of the upper as Well as the edge of the rand Mb and where the upper is cut away, between the straps, the insole is cemented to the outsole, due to the use of the wedges 22. Also, the shank portion of the outsole is pressed onto the convex surface formed by the shank stifiener I'I and the strips 20, with the crown of this surface fitting into the groove 32. The adhesive forms a. solid union, and the sheath !9 sticks to the groove. With the outsole in place the shank portion of the outer sole is pressed into a substantially convex surface, and the edges of this section taper down and merge into the edge of the shank portlon of the insole. This insures a Well defined narrow edge at the shank, which is a highly desirable characteristic of a well made Shoe. This effect is further emphasized by the fact that the edge of the outsole is colored to match the upper thus detracting from the apparent thickness of the outsole of the shank. It will be understood that the degree of curvature of the convex surface on the shank portion of the outersole is less than that of the surface to which it is attached, due in the main, to the groove 32.

After the sole is laid, the heel is attached, and the flnishing Operations are performed in the usual manner.

It will be understood that many changes in the herein disclosed specific embodiment of this invention will suggest themselves to those skilled in the art, which changes are not a departure from the spirit and scope of this invention, I therefore do not intend to be limited in the scope of this invention except as defined in the appended claims.

Having thus described my invention I claim:

1. In the method of making cemented shoes having straps lasted to an insole, the steps of inserting wedges of a width equal to the spaces between said straps between the insole and the last, coating the outsole with cement, and attaching the outsole by pressure, whereby said wedges cause the outsole to adhere to the insole at the parts where the wedges are used.

2. In the method of making cemented shoes having straps lasted to the insole, the steps of inserting wedges of a width equal to the spaces between said straps, and of a thickness substani'ia-lly equal to the thickness of the straps, beiween the insole and the last, coating the outsole With cement, and attaching the outsole b-y pressure, whereby said wedges cause the outsole to adhere to the insole at the parts where the wedges are used.

CI-LARLES MILLER.

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