Molded shanks

Details Molded shanks Molded shanks

1983-02-22

1984-07-24

Schroeder, Werner H.

Boots, shoes, and leggings

Shanks

36 76R, 12146S, A43B 1342, A43D 3104

Patent

active

044611013

ABSTRACT:
A spring-type shank for a shoe sole is formed on the bottom of a shoe assembly during manufacture of the shoe. The heel end of the shank is formed so that it is raised slightly from the heel seat region of the insole to provide a "spring shank". The shank is formed directly on the bottom of the shoe insole from a strip of initially flexible, uncured thermosetting material which may be fiber reinforced. The spring portion at the heel end of the shank is formed by placing a wedge between the shoe insole and the heel end of the shank strip during the curing process thereby to cause the heel end of the shank strip to cure in a raised, inclined attitude, spaced from the bottom of the insole, while the more forward, remaining portions of the shank strip cure in secure attachment to the insole bottom.

REFERENCES:
patent: 324065 (1885-08-01), Andrews
patent: 2114526 (1938-04-01), Feder
patent: 2414707 (1947-01-01), Barnett
patent: 2746178 (1956-05-01), Miller et al.
patent: 2967362 (1961-01-01), Montoscuro
patent: 3142910 (1964-08-01), Levine
"Shank Program 1940", United Shoe Machinery Corp., p. 4.

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