Method of making a shoe sole having a preformed insert

Details Method of making a shoe sole having a preformed insert Method of making a shoe sole having a preformed insert

1977-05-03

1978-10-31

Hoag, W.E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264250, 264255, 264275, 264328, 425119, 425129S, 425130, B29C 500, B29D 300, B29D 3100, B29F 110

Patent

active

041234936

ABSTRACT:
Method for making a sole for an article of footwear including an outer sole with a lightweight filler therein, an inner sole above the outer sole and a foxing strip integral with the inner sole and surrounding the periphery of the outer sole. The sole is produced using a dummy last with a recess for receiving the filler, a clamping last, mold sides and a bottom mold piston. The outer sole is molded first using the dummy last and filler, a first portion of the mold sides and the mold piston to define a first mold cavity. Then, the inner sole is molded using the clamping last, a lasted upper or the like, a second portion of the mold sides, and the outer sole on the mold piston to define a second mold cavity. By providing suitable recesses in the dummy last and in the first portion of the mold sides, one or more projections which extend through the foxing strip are molded in the first mold cavity.

REFERENCES:
patent: 2383122 (1945-08-01), Ghez et al.
patent: 2552601 (1951-05-01), Supple
patent: 2724912 (1955-11-01), Silombra
patent: 2772194 (1956-11-01), Fisher et al.
patent: 2996764 (1961-08-01), Ross et al.
patent: 3284558 (1966-11-01), Ludwig
patent: 3596381 (1971-08-01), Fukuoka
patent: 3761554 (1973-09-01), Barnette
patent: 3983204 (1976-09-01), Opinsky et al.

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