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US 4,044,417 AGranted
Molding footwear lasts
AssigneeJones & Vining, Incorporated
InventorArnold Cohen
Life of this patent
Estimating the term…
Abstract
Footwear lasts are molded by preparing an oversized model of the last to be molded; isolating, applying mold release to, and covering with liquid ISP at least first and second surface portions of the model; allowing the ISP cure to form at least first and second mold portions; and using the mold portions to mold plastic lasts.
Claims10
A method of making molded footwear lasts, comprising the steps of
- preparing an oversized model of the last to be molded,
- isolating, applying mold release to, and covering with liquid instant set polymer (ISP) at least first and second surface portions of said model,
- allowing said ISP to cure to form at least first and second mold portions, and
- using said mold portions to mold plastic lasts.
1 more element
Dependencies are inferred from the claim text.