Vulcanized rubber footwear product
AssigneeLa Crosse Footwear, Inc.
InventorTarachand S. Barma
Life of this patent
Estimating the term…
Abstract
The present invention provides a rubber footwear vulcanizate to which an outsole may be separately affixed. The vulcanizate may be suitably manufactured from an assembly of an uncured rubber upper insole, welt and a vulcanized midsole. The inner and outer surfaces of the midsole may be suitably roughened, and the surface thereof which interfaces the uncured assembly may be precoated with an uncured rubber. The assembled uncured rubber footwear components may be vulcanized into a footwear product of unitary construction. The outer midsole surface permits a wide variety of outer soles of different compositions to be separately secured thereto.
Claims17
A footwear assembly, comprising:
- an uncured rubber upper;
- an uncured rubber insole mounted on said upper;
- a midsole mounted on said insole, said midsole including a midsole base and means for securing said base to said insole, said base consisting essentially of a prefabricated material which is substantially non-crosslinkable and which retains its structural integrity during vulcanization of said upper and said insole, and which has an exposed outer face disposed to receive an outsole thereon.
A vulcanized footwear assembly, comprising:
- a rubber upper;
- a substantially flat, rubber insole overlapping said upper at mutually superposed edge portions of said upper and said insole, said insole having an inner face facing said upper and an outer face opposite said inner face;
- a midsole superposed on said outer face of said insole, said midsole having an outer face shaped to receive an outer sole thereon in face-to-face contact therewith;
- and
- a layer of vulcanized rubber securely adhered to an inner face of said midsole,
- wherein said vulcanized rubber layer, said upper and said insole having been intervulcanized to form a unitary structure, said midsole is made of a prefabricated material consisting essentially of vulcanized rubber having a particulate, fibrous filler substantially uniformly distributed therein, and said midsole is secured to said unitary structure by means of said rubber layer.
A vulcanized footwear assembly comprising:
- a rubber upper;
- a substantially flat, rubber insole overlapping said upper at mutually superposed edge portions of said upper and insole, said insole having an inner face facing said upper and an outer face opposite said inner face;
- a midsole superposed on said outer face of said insole, said midsole having an outer face shaped to receive an outer sole thereon in face-to-face contact therewith;
- and
- a layer of vulcanized rubber securely adhered to an inner face of said midsole,
- wherein said rubber layer has ben formed by first coating said inner face of said midsole with an uncured rubber latex, then coating the thus-formed latex layer with a coating of an uncured rubber solution or dispersion, and said rubber layer, said upper, and said insole have been intervulcanized to form a unitary structure, and wherein said midsole is made of a prefabricated material which is non-crosslinkable and which retains structural integrity during said intervulcanization of said rubber layer, said upper, and said insole, and is secured to said unitary structure by means of said rubber layer.
Dependencies are inferred from the claim text.