Method of forming anti-slip shoe sole
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United States of America Patent
Stats
-
Feb 25, 1992
Grant Date -
N/A
app pub date -
Apr 10, 1990
filing date -
Apr 2, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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