Ceramic heater roller with zone heating

Details Ceramic heater roller with zone heating Ceramic heater roller with zone heating

1993-06-28

1995-05-30

Jeffery, John A.

Electric heating

Heating devices

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

492 46, H05B 300, H05B 314, G03G 1520

Patent

active

054203953

ABSTRACT:
A thermal conductive roller for use in copying machines, steam-heated and induction-heated applications includes a ceramic heating layer formed by plasma spraying a ceramic material. Conductive bands are provided for supplying electrical current to portions of the ceramic heating layer. In one embodiment, heat is generated by passing current through a length of the roller between two narrow bands. In a second embodiment, heat is generated by directing current radially from the core of the roller to an outer ground layer through wide bands corresponding to heating zones for the roller. In a third embodiment, the ceramic layer is inside the steel core.

REFERENCES:
patent: 3310655 (1967-03-01), Hager, Jr.
patent: 3805020 (1974-04-01), Bates
patent: 4535230 (1985-08-01), Brieu
patent: 4560860 (1985-12-01), Fauser
patent: 4618240 (1986-10-01), Sakurai et al.
patent: 4628183 (1986-12-01), Satomura
patent: 4801968 (1989-01-01), Kogure et al.
patent: 4883941 (1989-11-01), Martin et al.
patent: 4888464 (1989-12-01), Shibata et al.
patent: 5041718 (1991-08-01), d'Hondt et al.

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