Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1975-07-14
1977-08-16
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156306, 156321, 156333, 179111E, 181170, 307 88ET, C09J 702, H04R 706
Patent
active
040424383
ABSTRACT:
In assembling at least one metal frame in abutting supporting relation to a diaphragm to form a diaphragm assembly for an electro-acoustic transducer, for example, as in a microphone or headphone, the diaphragm, which may be an electret, is formed at least in part of a thermoplastic resin so as to provide the latter at each surface of the diaphragm which, in the abutting supporting relation, is engaged by a surface of a metal frame, and the frame or frames and the diaphragm are pressed together in the desired abutting supporting relation while each metal frame is heated so that heat is transmitted through the latter to melt the thermoplastic resin at the engaged surfaces of the diaphragm and frame or frames, whereupon the heating of the frame or frames is halted so that the thermoplastic resin hardens to bond together the diaphragm and frame or frames in the desired abutting supporting relation.
REFERENCES:
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patent: 2998343 (1961-08-01), Gold et al.
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patent: 3190972 (1965-06-01), Schoeps et al.
patent: 3563828 (1971-02-01), Marshall
patent: 3749621 (1973-07-01), Shoffner
patent: 3755043 (1973-08-01), Igarashi et al.
patent: 3845544 (1972-09-01), Nurminen et al.
Fukumoto Toru
Kawakami Hirotake
Takada Kantaro
Drummond Douglas J.
Eslinger Lewis H.
Sinderbrand Alvin
Sony Corporation
Wityshyn M. G.
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