Folding keyboard

Details Folding keyboard Folding keyboard

1997-04-23

1999-08-24

Powell, Mark R.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Including keyboard

345156, 400472, 400479, 400492, B41J 510

Patent

active

059430419

ABSTRACT:
Disclosed is a folding keyboard of at least two sections, each having an opening therein which is open on the facing ends thereof, and a multilayer sheet for making the electrical connections upon actuation of the keys, the multilayer sheet having substantial stiffness in the flat, planar direction and limited flexibility perpendicular to the planar direction which allows bending about a curvature, the multilayer sheet being fixed in only one of the sections, whereby when the sections are in the open, unfolded position, the multilayer sheet is straightened into a flat, planar shape and registered with the keys of the other sections, and when in the closed, folded position is curved in the perpendicular, cylindrical direction between the sections and slid from the registered position in the other section towards the open facing end thereof. Additionally, the multilayer sheet is cut along any keys which protrude beyond the folding axis so as to allow the cylindrical curving thereof. Further, a coating is provided to assist in the slidability of the multilayer sheet.

REFERENCES:
patent: 5644338 (1997-07-01), Bowen
patent: 5653543 (1997-08-01), Abe
patent: 5687058 (1997-11-01), Roylance
patent: 5742241 (1998-04-01), Crowley et al.
patent: 5841635 (1998-11-01), Sadler et al.

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