Metal working – Method of mechanical manufacture – Electrical device making
Patent
1988-05-25
1989-06-20
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29 2542, 26427215, 26427218, 264105, 264131, 264132, 156344, H01C 1706
Patent
active
048399604
ABSTRACT:
A stator for a variable resistor, manufactured by a step of preparing a heat resistant film of polyimide, a step of preparing a transfer sheet by providing a resistor film containing carbon powder and allyle resin, such as diallyl phthalate resin, on the heat resistant film, a step of preparing a lead terminal, a step of preparing a forming die having a cavity for forming a substrate, a step of locating the transfer sheet and the lead terminal in the forming die to expose at least a part of the resistor film in the cavity and position a part of the lead terminal in the cavity, a step of introducing allyle resin, such as diallyl phthalate resin, into the cavity to form a substrate joined with at least a part of the resistor film, in which substrate a part of the lead terminal is buried, and a step of separating the heat resistant film from the substrate to leave the resistor film.
REFERENCES:
patent: 2606985 (1952-08-01), DeBell
patent: 3013913 (1961-12-01), Croop et al.
patent: 3085295 (1963-04-01), Pizzino et al.
patent: 3618200 (1971-11-01), Matsuo et al.
patent: 4350741 (1982-09-01), Hasegawa et al.
Fukui Norio
Kasanami Tohru
Tani Hiroji
Yamamoto Keizou
Yokoi Tsutomu
Echols P. W.
Murata Manufacturing Co.,Ltd.
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