Casting or injection molding of multi-layered shoe soles

Details Casting or injection molding of multi-layered shoe soles Casting or injection molding of multi-layered shoe soles

1977-11-03

1979-04-17

Flint, Jr., J. Howard

Static molds

Uniting preform with molding material

425119, 425129S, 294105, B29C 900, B29F 100, B29H 314, B29H 512

Patent

active

041496965

ABSTRACT:
The bottom or tread layer 18 of a shoe sole 17 is formed with a beaded flange 26 extending outwardly around its upper edge, which serves as a barrieragainst the incursion of the material of the upper sole layer 19 into the side face region 20 of the sole during the casting or moulding of the upper layer. The flange is subsequently removed to leave a clean separation line between the two sole layers.

REFERENCES:
patent: 3305895 (1967-02-01), Ludwig
patent: 3374504 (1968-03-01), Ludwig
patent: 3376608 (1968-04-01), Wilcox
patent: 3474496 (1969-10-01), Klee
patent: 3510914 (1970-05-01), Hujik
patent: 3555609 (1971-01-01), Chu et al.
patent: 3574895 (1971-04-01), McIlvin

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