Electric heating – Metal heating – Of cylinders
Patent
1985-06-24
1986-07-22
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1053, 219 1057, 219 1073, 1562737, 1562742, 1563802, H05B 640
Patent
active
046021396
ABSTRACT:
A plastic resin between two portions of a sheet metal assembly is heated to a curing temperature to adhere the sheet metal portions together by induction heating of only portions of the sheet metal immediately adjacent the resin. The sheet metal assembly is received between a pair of fixtures with the portions to be heated disposed between a pair of generally opposed induction coils through which an alternating current having a frequency of at least about 5,000 Hz and preferably at least 50,000 Hz is passed for less than fifteen seconds. The fixtures do not rigidly clamp the sheet metal assembly and may be opened and closed to facilitate the insertion and removal of sheet metal assemblies.
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