EVA insole manufacturing process

Details EVA insole manufacturing process EVA insole manufacturing process

Filed on

1990-11-29

Date issued

1992-08-25

Examiner

Dawson, Robert A.

Patent Class

Adhesive bonding and miscellaneous chemical manufacture

SubClass

Methods

SubSubClass

Surface bonding and/or assembly therefor

Other Related Categories

156245, 264 451, 264 464, 264245, 2643281, B29C 6722

Type

Patent

Status

active

Patent number

051415780

Description

ABSTRACT:
An EVA insole manufacturing process includes a step of mixing an EVA resin with a foaming agent for producing a molding through an injection molding process, and a step of heating the molding thus obtained in a mold so that it foams into a predetermined shape. Two or more moldings which respectively contain a different concentration of foaming agent or a different pigment color may be put together in a common mold and subjected to integral foaming and form setting process, so as to produce an insole which has different hardness and color at different parts thereof.

REFERENCES:
patent: 3705934 (1972-12-01), Giannini
patent: 3985853 (1976-10-01), Weisberg
patent: 4012380 (1977-05-01), Nuttall
patent: 4594283 (1986-06-01), Ohigashi
patent: 4648923 (1987-03-01), Chapnick
patent: 4674204 (1987-06-01), Sullivan et al.

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