Fixing device and method which uses a heat dissipating roller ha

Details Fixing device and method which uses a heat dissipating roller ha Fixing device and method which uses a heat dissipating roller ha

1991-11-05

1993-05-18

Grimley, A. T.

Photocopying

Contact printing

Light boxes

165 89, 219216, 355295, G03G 1520

Patent

active

052125289

ABSTRACT:
A thermal toner fixing device for a xerographic apparatus comprises a heat dissipation mechanism for dissipating heat accumulating in a pressure roller rotating in contact with a heat roller so as to achieve substantially uniform thermal deformation throughout the pressure roller and, as a result, uniform contact with the heat roller irrespective of the width of the paper sheet being conveyed. The device enables both wide and narrow sheets of paper to be properly conveyed with high reliability. Preferably, the heat dissipation mechanism is a heat dissipation roller in contact with the pressure roller, and the heat dissipation roller has a substantially hollow interior for the passage of circulating cooling air.

REFERENCES:
patent: 4963942 (1990-10-01), Aoki
patent: 4963943 (1990-10-01), Tamary
patent: 5032875 (1991-07-01), Gooray et al.
patent: 5070231 (1991-12-01), Bacus et al.

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