Resistive contact for resin-based heating elements

Details Resistive contact for resin-based heating elements Resistive contact for resin-based heating elements

1992-07-17

1993-08-10

Reynolds, Bruce A.

Electric heating

Heating devices

With heating unit structure

219469, 219543, H05B 308, B21B 2706

Patent

active

052351637

ABSTRACT:
A heating element for a plastic film laminator has a cylindrical base member. A heating layer of conductive resin such as conductive silicone is molded to the base member. An outer layer of dielectric material may cover the heating layer. Resistive electrical contacts are connected to the heating layer. An electrical power supply is connectable to the contacts. The resistive contacts create a voltage drop within the contact along the axis of current flow. This lowers the current density at the interfaces of the contacts and heating layer to prevent localized overheating of the conductive resin.

REFERENCES:
patent: 3649810 (1972-03-01), Tsuboi et al.
patent: 3952696 (1976-04-01), Saupe
patent: 4628187 (1986-12-01), Sekiguchi
patent: 4774397 (1988-09-01), Grise

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