Process for producing a shoe sole having two wooden parts interc

Details Process for producing a shoe sole having two wooden parts interc Process for producing a shoe sole having two wooden parts interc

1983-07-08

1985-09-24

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

12146B, 36 115, 36 13, 36 33, 36 86, 264 464, 264162, 264261, 264274, B29D 2700, B29D 2704

Patent

active

045432228

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.

REFERENCES:
patent: 2319879 (1943-05-01), Pierson
patent: 2976573 (1961-03-01), Davis
patent: 4177582 (1979-11-01), Ehrlich
patent: 4273737 (1981-06-01), Grachten

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