High frequency apparatus for forming structural shapes

Details High frequency apparatus for forming structural shapes High frequency apparatus for forming structural shapes

1977-04-20

1979-04-03

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Electro-static or inductive field

219 1081, 264 26, 264137, 425 93, 425383, 425404, 425446, 425DIG13, B29C 2500

Patent

active

041474880

ABSTRACT:
Apparatus and method for the continuous manufacture of structural shapes are disclosed. Mineral fiber material in the form of continuous strands, webs, or mats, impregnated with a heat-hardenable resin, is passed through a dielectric heater. The material is shaped as it passes through metallic dies that are disposed within the dielectric heater. The electric field between the electrodes of the heater is reduced or shunted at the location of the dies. The heater is arranged so that the maximum electrical field occurs adjacent the entrance to the heater.

REFERENCES:
patent: 2303341 (1942-12-01), Dufour et al.
patent: 3501562 (1970-03-01), Onoyama et al.
patent: 3532848 (1970-10-01), Loring, Jr. et al.
patent: 3701875 (1972-10-01), Witsey et al.
Industrial High Frequency Electrical Power, May, E. 1949, "Stub Matching", pp. 245-247.

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