Printing light indicia on keyboard keys

Details Printing light indicia on keyboard keys Printing light indicia on keyboard keys

1995-03-13

1996-11-26

Bennett, Christopher A.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

400493, 400494, B41J 512

Patent

active

055778496

ABSTRACT:
A polyol polyester and hexamethylene diisocyanate in a fluid mixture with white pigment, silicon glycol surfactant and thinner are pad printed on keyboard key to print characters and symbols which require no protective overcoat.

REFERENCES:
patent: 4341689 (1982-07-01), Doshi et al.
patent: 4776270 (1988-10-01), Kumamoto
patent: 4903601 (1990-02-01), Fukui
patent: 4980221 (1990-12-01), Kobayashi et al.

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