Heating elements for plastic film laminators

Details Heating elements for plastic film laminators Heating elements for plastic film laminators

1990-02-06

1992-01-14

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219543, H05B 326

Patent

active

050813404

ABSTRACT:
A heating element for a plastic film laminator has a base member, either flat or cylindrical. An insulating layer of non-conductive material is formed on the base member. A heating layer formed of conductive resin such as conductive silicone is molded to the base member, with the insulating layer between the base and heating layer. An outer layer of non-conductive silicone may cover the heating layer. Electrical contacts are connected to opposite sides of the heating layer. An electrical power supply is connectable to the contacts. Current passing through the heating layer provides uniform heating which is transferred to the plastic to be laminated.

REFERENCES:
patent: 2357845 (1944-09-01), Nordquist
patent: 3399292 (1968-08-01), Boldridge
patent: 3546433 (1970-12-01), Johnson
patent: 3649810 (1972-03-01), Tsuboi
patent: 4034189 (1977-07-01), Sakamaki
patent: 4071737 (1978-01-01), Marshall
patent: 4395109 (1983-07-01), Nakajima
patent: 4791275 (1988-12-01), Lee
patent: 4820904 (1989-04-01), Urban

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