Method of filter molding and electrical heating unit made thereb

Details Method of filter molding and electrical heating unit made thereb Method of filter molding and electrical heating unit made thereb

1974-06-24

1976-08-31

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

By direct application of vacuum or pneumatic pressure

219544, B28B 126

Patent

active

039781836

ABSTRACT:
A process for producing an electrical heating unit by filter molding an inorganic refractory fiber to form an insulating body about a heating element wherein a layer of insulating fabric is placed on the filter mold screen and the heating element positioned on the fabric prior to filter molding so that the heating element becomes completely embedded in the insulating body and is at a controlled depth below the surface of the insulating body as defined by the thickness of the fabric.
Also disclosed is a sleeve heater having integral vestibules as may be made according to the method of the present invention.

REFERENCES:
patent: 3500444 (1970-03-01), Hessee et al.

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