Electric heating – Metal heating – For bonding with pressure
Patent
1986-01-28
1987-04-21
Goldberg, E. A.
Electric heating
Metal heating
For bonding with pressure
29179, B23K 1114
Patent
active
046598979
ABSTRACT:
A method of making a watchcase, in which two projections are formed on a joining surface of a part of the watchcase, such as a band connecting lug. The part is joined to another part such as a case body by projection welding to make the watchcase.
REFERENCES:
patent: 4087894 (1978-05-01), Kuechli et al.
patent: 4382172 (1983-05-01), Takasugi
patent: 4409460 (1983-10-01), Nishii et al.
patent: 4495397 (1985-01-01), Opprecht et al.
Citizen Watch Co. Ltd.
Goldberg E. A.
Sigda C. M.
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