Method of manufacturing contact rubber structure

Details Method of manufacturing contact rubber structure Method of manufacturing contact rubber structure

1982-09-24

1984-08-07

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

156245, 264250, 264259, B29C 1700, B29F 112

Patent

active

044643268

ABSTRACT:
In a method of manufacturing a contact rubber structure, colored, hard, non-vulcanized rubber materials are injected into cavities of a mold for molding key top portions. A mold for molding key sheet portions is placed over the key top portions formed by the foregoing molding step. A non-vulcanized rubber material which is softer than the material of each key top portion is charged, compressed and heated, so that the key sheet portions are made to be integral with the key top portions.

REFERENCES:
patent: 2185924 (1940-01-01), Pereira
patent: 3013913 (1961-12-01), Croop et al.
patent: 3268643 (1966-08-01), Katzenmeyer
patent: 3719735 (1973-03-01), Valyi
patent: 3776998 (1973-12-01), Church
patent: 3879245 (1975-04-01), Fetherston et al.
patent: 4067102 (1978-01-01), Durocher et al.
patent: 4069290 (1978-01-01), Pasch
patent: 4348003 (1982-09-01), Beneteau
patent: 4385025 (1983-05-01), Salerno et al.

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