Method for producing a blow molded plastic outdoor boot shell
AssigneeWisconsin Alumni Research Foundation
InventorAlexander L. Gross
Life of this patent
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Abstract
A boot comprising an upper portion, an outersole portion, an optional midsole/wedge portion and a shell portion, wherein the shell portion is produced by the blow molding process. The shell portion may contain a midsole/wedge element inside or outside of its volumetric shape and it may also contain a pre-molded outersole which is replaced into the blow mold. The shell portion can be produced with thickness as little as 0.25 mm and weight as low as 25 grams. The shell portion may be constructed of any material that is extrudable. The shell portion is produced with mold cavities, but no mold core. The shell portion may be flocked internally with textile fibers. A pair of shell portions can be simultaneously produced from a single extrusion of material.
Claims21
A boot comprising:
- an outersole portion
- an upper portion
- a shell portion which encloses the foot;
- a midsole portion
A boot comprising:
- an outersole portion;
- an upper portion;
- a shell portion which encloses the foot;
- a midsole portion located either inside of the shell portion, outside of the shell portion, both inside and outside of the shell portion, or not provided at all.
Dependencies are inferred from the claim text.