Electric heating – Inductive heating – With heat exchange
Patent
1994-07-25
1995-11-14
Leung, Philip H.
Electric heating
Inductive heating
With heat exchange
219634, 219643, 288 21, 1562742, H05B 610
Patent
active
054669162
ABSTRACT:
When resin pipes are connected through induction heating, the resin pipes of this invention do not form inside bulges due to air and resin expansion during the heating process. A cylindrical heater made of stainless steel is placed around the joint between two resin pipes made of polyvinylidene fluoride. The heater is then heated by induction heating to weld the joint of resin pipes. The heater has a plurality of holes on the cylindrical surface so that air and molten resin located between the heater and the resin pipes are released through the holes.
REFERENCES:
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patent: 2943179 (1960-06-01), Raiha
patent: 3062940 (1962-11-01), Bauer et al.
patent: 3238346 (1966-03-01), Sauko
patent: 3996402 (1976-12-01), Sindt
patent: 5053595 (1991-10-01), Derbyshire
patent: 5160396 (1992-11-01), Jensen
patent: 5338920 (1994-08-01), Okusaka et al.
Akabane Atsushi
Iguchi Atsushi
Matsuoka Ko-ichi
Yamashita Takehiro
Asahi Yukizai Kogyo Co. Ltd.
Hidec Co., Ltd.
Leung Philip H.
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