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Primary Examiner: Esposito, Michael F.
Assistant Examiner: Lawrence, Evan K.
Attorney: McKellar; Robert L.

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Title: Method of manufacturing a keyboard

Abstract: A method for manufacturing a keyboard which can be utilized in a keying structure is described. It consists of layering a flat fixed plate with a conductive paint, masking a preformed insulating rubber keyboard, laying the keyboard on the conductive paint surface and thereafter applying pressure to the rubber keyboard to the extent that certain portions of the rubber keyboard are put in contact with the conductive paint.

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Inventors: Nishikata, Masumi (Tokyo, JP)
Tsugawa, Kiyoshi (Tokyo, JP)

Application Number: 533097
Filing Date: 1974-12-16
Publication_date: 1979-03-06
Assignee: Fuji Polymer Industries, Co., Ltd. (Tokyo, JP)
Primary Class(es): 427/58 29/622, 29/825, 200/5R, 200/330, 400/479, 400/694, 427/152, 427/272, 427/275
Other Classes:
US Patent Ref:

2751315	Jun, 1956	Staehle	427/369.
2776235	Jan, 1957	Peck	156/234.
2914437	Nov, 1959	Schriner	156/234.
3099578	Jul, 1963	Hunter	252/514.
3701317	Oct, 1972	Miyamoto et al.	252/514.

Other Refs: Other References: Printed Circuit Techniques, National Bureau of Standards Circular 468, Nov. 15, 1947, pp. 12-13.