Keyboard of elastic material for office machines

Details Keyboard of elastic material for office machines Keyboard of elastic material for office machines

1973-11-16

1976-06-22

Burr, Edgar S.

Textiles: fiber preparation

235145A, 340365R, B41J 508, B41J 512

Patent

active

039645940

ABSTRACT:
In an office machine keyboard comprising a plurality of keys formed by an array of areas of layer of elastic material, each key is provided with an identifying character in relief on an insert. The insert is embedded in the elastic layer so that the character is visible on the fingering surface of the layer, is surrounded by the material of the elastic layer and contrasts in color with the material. The insert is provided with internal passages. The elastic material engaging the internal passages forms struts interlocking the inserts in the elastic layer.
The keyboard is formed by injection of a hot elastomer in a moulding die in which are positioned the inserts.

REFERENCES:
patent: 2947404 (1960-08-01), Siebels et al.
patent: 3120583 (1964-02-01), Cornell
patent: 3684842 (1972-08-01), Boulanger
patent: 3699294 (1972-10-01), Sudduth
patent: 3760137 (1973-09-01), Shimojo et al.
patent: 3823309 (1974-07-01), Caruso

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