Keyboard for typewriters, printers or the like

Details Keyboard for typewriters, printers or the like Keyboard for typewriters, printers or the like

1990-12-19

1991-10-29

Burr, Edgar S.

Typewriting machines

Key-board or key lever-actuating mechanism

Including means generating a signal for type selecting or...

4004912, 200 5A, 200512, 200535, B41J 508

Patent

active

050610945

ABSTRACT:
In a keyboard for typewriters, printers or the like, where a contact bearing film is disposed underneath the keys, there is provided for achieving a cost-efficient arrangement, while avoiding the use of separate restoring springs, that the contact bearing film (10) has U-shaped cut-outs (11) in the area of the keys (1), the film tongues (12) are bent by 180.degree. and are acted upon by the key tappet (3) of the keys (1), the contacts (14, 15) formed between the base of the film, the underside of the film tongue (12), and the film tongue (12) act at the same time as a restoring spring.

REFERENCES:
patent: 2919004 (1959-12-01), Henatsch
patent: 3749872 (1973-07-01), Foster
patent: 3982081 (1976-09-01), Demler, Jr.
patent: 4421958 (1983-12-01), Kameda
patent: 4480932 (1984-11-01), Willcox
patent: 4480937 (1984-11-01), Eckhardt
patent: 4529849 (1985-07-01), Kamei et al.

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