Footwear sole with integrally molded shank
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United States of America Patent
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-
May 16, 2000
Grant Date -
N/A
app pub date -
Sep 4, 1998
filing date -
Sep 4, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A footwear sole comprises a foot-shaped sole of a relatively cushioned, low density polymer foam, with a higher density, harder midfoot shank portion integrally fused within it. The sole may be a unitary footwear sole or may have an outsole or insole adhered thereto. A method of manufacture of the sole comprises forming a polymer foam sole piece, stamping out a portion of the midfoot, forming a shank of higher hardness polymer foam to fit the stamped-out midfoot portion of the sole piece, fitting the shank into the sole piece, and hot compression molding the sole piece and shank to form a unitary, integral sole. The sole of the invention is particularly useful as a sandal sole.
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