US1947031A - Insole and process of making shoes therewith - Google Patents

Description

Fb 13, 1934. -v w. BAIN 1,947,031

INSLE AND PROCESS OF MAKING SHOES THEREWITH Filed Aug. 19, 1932 2 Sheets-Sheet 1 Feb. 13, 1934;"

w. H. BAIN "TINSOLE AND PRQCESS OF MAKING SHOES 'YTHEREWITH -Fi1ed,Aug. 19, 1932 2 Sheets-Sheet 2 Patented Feb. 13, 1934 y UNITED STATES PATENT oFFicaf THEREWITH INSOLE AND PROESS F MAKING SHOES This invention relates to the manufacture of shoes, and has for its principal object to provide a shoe with an insole having a relatively thin and flexible forepart and a removable backing therefor to hold the parts to shape during the lasting operation. The invention consists in the insole and in the process hereinafter described and claimed. y

In the accompanying drawings, which form part of this specification and wherein like symbols refer to like parts wherever they occur,

' Figs. 1, 2 and 3 are, respectively, an inner face view of the relatively thin and flexible forepart, the relatively thick and inflexible shank piece, and the forepart backing piece which form the insole embodying my invention,

Fig. 4 is an inner face view, showing the relatively thin and flexible forepart of the insole permanently cemented to the relatively thick and inflexible shank piece thereof,

Fig. 5 is an outer face view of the insole with the forepart backing piece removably secured thereto,

Fig. 6 is a longitudinal section through the insole on the line 6-6 in Fig. 5,

Fig. 7 is a longitudinal section showing the insole tacked to the bottom of the last after being molded to conform to the surface thereof,

Fig. 8 is a plan view showing the upper lasted to the insole,

Fig. 9 is a verticalcross-section on the line r Fig. 10 is a similar section on the in Fig. 8, i

Fig. 11 is a view similar to Fig. 8, showing the lastingstacks -pulled, the metal shank and the filling material applied and the outsole laid,

Fig. 12 is a longitudinal section through the shoe, showing the same removed from the vlast and the forepart backing piece partly removed from the shoe,

Fig. 13 is a bottom plan view of the shoe, showing the outsole stitched to the insole and upper,

Fig. 14 transverse section through the forepart of e on the line 14-14 in Fig. 13,

Fig. .s asimilar section through the shank portion of the VVshoe on the line 15-15 in Fig. ,13; and j' Fig. 16 is a longitudinal section throughy the finished shoe. f

The insole used in my process of making shoes comprisesv a forepart A of relatively thin exible leather, a shank piece B of relatively thick and inflexible ordinary insole leather, and a relatively thin forepart backing pieceC `of a mateline 10--10 then pulled outof the shoe.

rial such as fiber,having a greater stiffness and tensile strength than the thin leather forepart A. The forepart A and shank piece B of the inisole have their adjacent ends skived, overlapped and permanently secured together, preferably by means of cementing material 1; and the fiber forepart backing piece C is temporarily secured to the outer face of said forepart by cementing material 2, the shank` end of lsaid fiber forepart backing piece being preferably left free from said shank piece so as to facilitate its removal.

The insole thus formed is placed in a molding form (not shown) and shaped to conform'to the bottom surface of the last D to which it is to be secured. The molded insole is then placed on the last D with the removable ber forepart backing piece C engaging the bottom surface thereof, the insole being temporarily held on the last by tacks 3. A suitable cementing material 5 is then applied to the edges of the insole and the shoe upper E and the upper lasted to the insole. The front lasting allowance ofthe upper is secured to the insole by means of tacks 6 vthat are Ldriven only part way into the last, while the heel lasting allowance of the upper is secured to the insole by tacks 6a that are clinched on the inner face of the insole Lby means of a metal heel plate 7 :fixed to the bottomof the last. The usual metal shank stiffener 8 is then tacked to the inner face of the insole, after which. a filling 9 of cotton or the like is placed in the bottom ofthe forepart of the shoe to obtain an even surface forl the foot.

v After the cement 5 that holds the upper to the insole sets, the tacks 3 and 6' are pulled out. The lasting allowance of the upper is then smoothed, an outsole F is laid and temporarily held by any suitablemeans, as by cement 10, and the last is The removable fiber forepart backing piece C is then pulled out of the shoe, and the outsole is then permanently secured in place by a row of stitching 11 that passes through the upper and insole.

It is noted as 'an important advantage of my invention that it provides a strong and durable lightweight shoe that has extreme flexibility inthe forepart of its sole.I It is also noted that the removable fiber forepart backingV piece of the insole has a relatively high tensile strength and thus serves to prevent buckling'and stretching of the relatively thin and flexible leather forepart during the lasting operation(v Obviously, the invention admits of various .changes and`1 do not wish to limit myself to the operations hereinbefore described. For instance, the process is also applicable to shoes whose outsoles are not stitchedv to the uppers but only cemented, such cementing being done while the shoe is on the last.

What I claim is: 1,'An insole comprising a forepart of relatively thin. and ilegible material, a shank piece of relatively thick and. iniiexible' material, and a backing piece removably secured to said forepart, said backing piece being made of a material hav ing a greater tensile strengthandstiiness than said forepart.

2. An insole comprising a forepart of relatively thin and exible leather, a shank piece of relatively thick and inexible leather, means permanently securing said forepart and shank piece together, and a backing piece removably secured to said forepart, said backing piece being made of a material having a relatively high tensile strength and relatively high resistance to buckling.

3. An insole comprising a shank piece of relatively thick and inflexible material; a forepart of relatively thin and flexible material, 'and a backing piece of relatively stiff material of relatively high tensile strength removably secured iiatwise to the innerrface of said relatively thin and nexible iorepart to prevent stretching or buckling thereof, the rear portion of said backing` piece overlapp the inner race of the forward portion Learner of said shank piece and being left loose to/iacilitate removal thereof from said iorepart.

4. The process of making shoes having an insole with a relatively thick and inflexible shank piece and a relatively thinwd flexible forepart of single thickness which comprises temporarily securing to the forepart of said insole a backing piece of relatively greater tensile strength and stiffness than said forepart, placing said insole on a last with said backing piece in engagement therewith, cementing a shoe upper to said insole, laying on'an outsole, removing said last and said backing piece and then sewing said outsole to said upper and said shank'piece.

5. The process of making shoes having an nsole with a relatively thick and iniiexible shank piece and a relatively thin and flexible forepart of single thickness which comprises temporarily securing tothe vforepart of said insole a backing piece of relatively greater tensile strength and.

stiness than said forepart, placing said insole on a last with said backing piece in engagement therewith, cementing a shoe upper to said insole, laying on an outsole and permanently securing the same to said upper and said shank piece and then removing said last and said backing piece. f

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