Electric heating – Metal heating – Of cylinders
Patent
1983-06-24
1985-06-04
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1043, 219 1053, 219 1049R, 1562724, 1562739, 1563802, H05B 608
Patent
active
045216592
ABSTRACT:
This device for inductively heating and fusing thermoplastics includes an alternating current passing through a tank circuit, the inductor member of the tank circuit being wrapped around a curved pole piece of a ferromagnetic material. The magnetic flux arising within the inductor coil member flows to the ends of the pole piece and into a screen placed between the materials to be joined. The flux induces a current in the screen, and heat is generated to melt the thermoplastics together. Because only 30-150 watts of power are passed through the tank circuit, a wire which will remain cool under operational wattage may be selected, making air or fluid cooling unnecessary.
REFERENCES:
patent: 3816690 (1974-06-01), Mittelmann
patent: 3883712 (1975-05-01), McBriarty
patent: 3996402 (1976-12-01), Sindt
patent: 4017701 (1977-04-01), Mittelmann
patent: 4032740 (1977-06-01), Mittelmann
patent: 4048458 (1977-09-01), Zirk, Sr.
patent: 4055740 (1977-10-01), Nakamura et al.
patent: 4163884 (1979-08-01), Kobetsky
patent: 4371768 (1983-02-01), Pozna
Tudbury, Basics of Induction Heating, vol. 2, pp. 2-68 to 2-71, "Loading an Oscillator", May, 1960.
Buckley John D.
Fox Robert L.
Johnston David F.
Swaim Robert J.
King William H.
Leung Philip H.
Manning John R.
Osborn Howard J.
The United States of America as represented by the Administrator
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