Heated fuser roll

Details Heated fuser roll Heated fuser roll

1980-12-12

1982-05-11

Moses, Richard L.

Electric heating

Heating devices

Combined with diverse-type art device

219469, 432 60, H05B 300

Patent

active

043295665

ABSTRACT:
An improved heated fuser roll for use in a fuser apparatus for fixing toner images to a support surface is disclosed. The fuser roll includes a circular sleeve member having at least one heating unit positioned within the sleeve member. Each heating unit includes (i) a plurality of axially disposed thermally conductive members each formed of a chordal section having a curved surface positioned in contiguous relation to the inside curved surface of the sleeve member and a substantially flat surface, (ii) a plurality of wafer shaped heating elements 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 (iii) resilient means. Each of the heating units is separated from each other by an insulating member. The improvement comprises including a plurality of cavities on the flat surfaces of the thermally conductive members and positioning one of the heating elements within each of the cavities.

REFERENCES:
patent: 4050886 (1977-09-01), Moser
patent: 4200784 (1980-04-01), Albaric et al.
patent: 4253007 (1981-02-01), Dannatt
patent: 4266115 (1981-05-01), Dannatt

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