Process for producing a shoe sole having two wooden parts interconnected by a flexible polyurethane part beneath the ball of the foot
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United States of America Patent
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Sep 24, 1985
Issued Date -
N/A
app pub date -
Jul 8, 1983
filing date -
Sep 28, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of making a sole construction for a shoe is disclosed, the sole construction being of the type having at least two independently prefabricated wooden parts which are interconnected at an area beneath the ball of the foot of a wearer by at least one flexible polyurethane intermediate part. The method includes steps of placing the wooden parts in a mold, introducing a polyurethane foaming material into the remaining free space in the mold, allowing the polyurethane foaming material to foam with the mold closed to form the intermediate parts in interconnected relation with the wooden parts, removing the wooden and intermediate parts from the mold and thereafter working the side surfaces of the sole construction and the surfaces thereof facing the foot sole by grinding or milling.
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