Hot roll fusing device

Details Hot roll fusing device Hot roll fusing device

1979-05-21

1981-02-24

Braun, Fred L.

Electric heating

Heating devices

Combined with diverse-type art device

219470, 219505, 338 22SD, H05B 310

Patent

active

042530075

ABSTRACT:
A heated fuser roll for use in a fusing apparatus for fixing toner images to a support surface. The fuser roll includes one or more heating units each of which include (i) a wafer shaped 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 and (ii) an electrically conductive member for providing electrical current to the heating elements, the conductive member being in contiguous relation to the heating element; a thermally conductive plate; and a sleeve positioned around the heating unit and the plate. An insulating member is positioned between each of the electrically conductive members and the thermally conductive plates.

REFERENCES:
patent: 3356831 (1967-12-01), Andrus et al.
patent: 3401439 (1968-09-01), Staats et al.
patent: 3632971 (1972-01-01), Flanagan
patent: 3645785 (1972-02-01), Hentzschel
patent: 4127764 (1978-11-01), Minden

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