Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent
1982-05-20
1985-02-19
Wright, Jr., Ernest T.
Typewriting machines
Key-board or key lever-actuating mechanism
Key-cap or key-stem structure
400491, 400493, 264245, 428247, B41J 516
Patent
active
045002185
ABSTRACT:
A printing ink is vulcanized on the top surface of an operation indicating member consisting of a silicone-type elastomer and is integrated with the elastomer to form a character of a predetermined shape on the top surface. The printing ink consists essentially of a material which exhibits a vulcanizing mechanism similar to that of the silicon-type elastomer. In manufacturing the operation indicating member, the predetermined character is formed by means of the printing ink on a transfer plate disposed within a mold for molding the body of the indicating member. Next, the silicon-type elastomer is introduced into the mold and heated under elevated pressure to vulcanize and integrate the character on the transfer plate and the silicone-type elastomer, whereby the character is integrally embedded in the top surface of the operation indicating member formed in the mold.
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Levy Edward F.
Toho-Polymer Kabushika Kaisha
Wright, Jr. Ernest T.
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