Method of forming anti-slip shoe sole

Details Method of forming anti-slip shoe sole Method of forming anti-slip shoe sole

1990-04-10

1992-02-25

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 51, 264108, 26432812, B29C 6722

Patent

active

050911252

ABSTRACT:
A method of producing an anti-slip shoe sole makes use of a shoe sole forming die having a plurality of independent, projection-forming cavities in the bottom thereof. The cavities open to a reverse side of the die through respective escape holes connected to the cavities. A foamable, unvulcanized green rubber containing hard fibers dispersed therein is set in the shoe sole forming die. Heat and pressure are applied to the unvulcanized green rubber to cause the unvulcanized green rubber to fill the cavities and further to flow into the escape holes, thereby forming a shoe sole blank having projections integral therewith. Buffing is effected on the bottom portions of the projections, thereby allowing ends of the hard fibers to appear in the ground-contact surfaces of the projections.

REFERENCES:
patent: 1152935 (1915-09-01), Crane
patent: 2372177 (1945-03-01), Conner
patent: 2822627 (1958-02-01), Seiberling
patent: 2858571 (1958-11-01), Dunbar
patent: 3064391 (1962-11-01), Devol
patent: 3998681 (1976-12-01), Williams et al.
patent: 4089922 (1978-05-01), Saito et al.
patent: 4102831 (1978-07-01), Osgood
patent: 4493808 (1985-01-01), Sedlatschek et al.

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