The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 1983
Filed:
Mar. 06, 1981
Takafumi Asada, Hirakata, JP;
Kazuyoshi Shinohara, Hirakata, JP;
Kanji Kiyohara, Yao, JP;
Tadashi Sakairi, Katano, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A method of making a keyboard including, a number of switch keys fixedly provided on one surface of a resilient plastic sheet a number of moving contacts formed on the other surface of the resilient plastic sheet. The keys are formed of a plastic material having a melting temperature lower than that of the resilient plastic sheet. Thermoplastic bond layers are deposited on both surfaces of the resilient plastic sheet. The melting point of the thermoplastic bond layers is lower than that of the switch keys. The resilient plastic sheet is placed in a metal mold which has cavities (101a) at predetermined places. Melted plastic material is injected into the cavities to form the switch keys and at the same time cause the portions of thermoplastic bond layers which contact the injected melted plastic to be melted by the heat of the injected melted plastic material and to bond the switch keys onto the resilient plastic sheet.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile