Process for manufacturing a plastic shoe

Details Process for manufacturing a plastic shoe Process for manufacturing a plastic shoe

1990-11-16

1992-11-17

Sewell, Paul T.

Boot and shoe making

Processes

Miscellaneous parts

36 77M, 36 72R, A43C 1314

Patent

active

051631989

ABSTRACT:
A plastic shoe has a steel cap (3) which has a cushion (4) in the upper region inside the shoe. In its other regions the steel cap (3) is surrounded on the inside and outside by plastic foam which forms the upper (1) and the bottom (2) of the plastic shoe (2). The cushion (4) consists of an air-absorbing material, so that the air displaced under the cap during the foam-filling of the mold does not lead to voids in the plastic.

REFERENCES:
patent: 2740209 (1956-04-01), Shultz
patent: 2756519 (1956-07-01), Hill
patent: 3165841 (1965-01-01), Rollman
patent: 3593438 (1971-07-01), Mitchell
patent: 4011667 (1977-03-01), Greenan
patent: 4257177 (1981-03-01), Unsted
patent: 4342159 (1982-08-01), Edwards
patent: 4412393 (1983-11-01), Terlizzi, Jr. et al.
patent: 4566197 (1986-01-01), Sitzes
patent: 4778145 (1988-10-01), Savori et al.
patent: 4811501 (1989-03-01), Okayasu

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