Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1991-10-21
1994-01-04
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
264223, 264DIG30, 425 2, 12142N, 36 43, B29C 3340, A43B 1338
Patent
active
052757757
ABSTRACT:
An insert forming apparatus and method is provided for making an insert to conformingly fit a shoe and a person's foot within the shoe. The method for practicing the invention includes using standard molding techniques to form a mold of the bottom of the last and using the mold to vacuum form a lower shell half that conforms to the bottom of the last. With the lower shell half covering the mold and having vacuum communicating holes drilled therein, the last is placed in the lower shell half and the upper shell half is drawn down over the last and lower shell half by vacuum forming. When the upper and lower shell halves have been formed, a hole is drilled in the lower shell half for injecting curable material. A sheet of fabric or leather is placed over the lover shell half, a person's foot is placed on the fabric or leather in the lower shell half, and the upper shell half is placed over the person's foot and fastened to the lower shell half. Curable material is then injected into the lower shell half between the lower shell half and the fabric or leather, thus forming an orthotic appliance that conforms to the shoe and to the person's foot.
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AliMed Inc.; Freedom Foot System.TM. Pub date unknown.
Smith Duane S.
Woo Jay H.
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