Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1980-10-22
1982-03-16
Reynolds, B. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219216, 219505, 355 3FU, 338 22R, H05B 310
Patent
active
043202845
ABSTRACT:
A 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, the elements being positioned along the flat surface of each of the conductive members, and (iii) resilient means positioned in contiguous relation to the heating elements for exerting a substantially continuous pressure on the heating elements to keep them in contact with the conductive members. Each of the heating units is separated from each other by an insulating member.
REFERENCES:
patent: 3746836 (1973-07-01), Summerfield
patent: 4147927 (1979-04-01), Pirotte
patent: 4213031 (1980-07-01), Farber
patent: 4242567 (1980-12-01), Carter
patent: 4253007 (1981-02-01), Dannatt
Pitney Bowes Inc.
Reynolds B. A.
Roskoski Bernard
Scolnick Melvin J.
Scribner Albert W.
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