Hot roll fusing device

Details Hot roll fusing device Hot roll fusing device

1979-05-21

1981-05-05

Braun, Fred L.

Electric heating

Heating devices

Combined with diverse-type art device

219469, 219505, 338 22SD, H05B 310

Patent

active

042661153

ABSTRACT:
A heated fuser roll for use in a fusing apparatus for fixing toner images to a support surface. The fuser roll includes an electrically conductive core member having a plurality of axially disposed longitudinal channels lying along the outer surface of the core member, and a heating element formed of a semiconducting ceramic material having a positive temperature coefficient of resistivity and exhibiting a Curie temperature transition point at which the resistance of the material increases with increasing temperature positioned in each of the channels. A layer of a thermally conductive material covers the outer exposed surfaces of both the core member and heating elements, and a sleeve member is positioned around the thermally conductive material.

REFERENCES:
patent: 3401439 (1968-09-01), Staats et al.
patent: 3562489 (1971-02-01), Lenk
patent: 3582968 (1971-06-01), Buiting et al.
patent: 3632971 (1972-01-01), Flanagan
patent: 3645785 (1972-02-01), Hentzschel
patent: 3720808 (1973-03-01), Morrissey
patent: 4109135 (1978-08-01), Minden et al.

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