초록 ▼

The manufacture of a sole unit for footwear, such as an athletic shoe including an integral midsole/wedge or a separable wedge for use with a midsole. The integral midsole/wedge unit and the separable wedge comprise a shell and a core at least partially encapsulated within the shell. In the manufact

The manufacture of a sole unit for footwear, such as an athletic shoe including an integral midsole/wedge or a separable wedge for use with a midsole. The integral midsole/wedge unit and the separable wedge comprise a shell and a core at least partially encapsulated within the shell. In the manufacture the core is supported in a mold by a plurality of pins extending from an upper and lower mold half toward a parting line; or the core is supported on one or the other of an outsole or insole of the sole unit and closed in the mold. The material of the shell is poured or injected into the mold.

대표청구항 ▼

A midsole for use in the sole unit of footwear, such as an athletic shoe comprising a core composed of plastic material which is light of weight, providing a characteristic of springiness, and a shell also composed of plastic material more dense than the plastic material of said core, said shell bei

A midsole for use in the sole unit of footwear, such as an athletic shoe comprising a core composed of plastic material which is light of weight, providing a characteristic of springiness, and a shell also composed of plastic material more dense than the plastic material of said core, said shell being molded and partially disposed about said core covering one of its opposed surfaces throughout and extending to but substantially not beyond the plane including the other opposed surface thereby to cover the entire peripheral side of said core between surfaces, leaving substantially uncovered the other of the opposed surfaces, and said shell serving at least to maintain integrity and prevent break down and/or compression of said core under stress.