Molded shanks

Details Molded shanks Molded shanks

1982-01-15

1983-07-12

Schroeder, Werner H.

Boot and shoe making

Processes

Miscellaneous parts

12 405, 12 183, 36 76R, A43D 3100, A43D 2100

Patent

active

043922660

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: 1714670 (1929-05-01), Hiss
patent: 1722029 (1929-07-01), Bancroft
patent: 2414707 (1947-01-01), Barnett
patent: 2872746 (1959-02-01), Maccarone
patent: 3142910 (1964-08-01), Levine
patent: 4161048 (1979-07-01), Stanton
patent: 4236268 (1980-12-01), Bradley et al.

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