Electrical heater

Details Electrical heater Electrical heater

2006-03-21

2006-03-21

Pelham, Joseph (Department: 3742)

Electric heating

Heating devices

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

C392S444000, C219S535000, C219S536000, C219S549000, C219S205000, C123S14250E

Reexamination Certificate

active

07015428

ABSTRACT:
A heater formed of multiple layers with at least two envelope layers sealed to each other to form a closed envelope and with at least one of the layers within the sealed envelope layers comprising a gas permeable internal ground member that permit one to heat seal the envelope layers to each other and prevents destruction of the heater if the heater accidentally exceeds a critical operating temperature.

REFERENCES:
patent: 2844696 (1958-07-01), Custer, Jr.
patent: 3904850 (1975-09-01), Johnson
patent: 4468557 (1984-08-01), Bylin et al.
patent: 4888472 (1989-12-01), Stitz
patent: 5017758 (1991-05-01), Kirkman et al.
patent: 5352862 (1994-10-01), Barr
patent: 5837971 (1998-11-01), Lee
patent: 5874712 (1999-02-01), Toth et al.

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