Heat-fixing apparatus

Details Heat-fixing apparatus Heat-fixing apparatus

1990-08-06

1991-12-17

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

219469, 118 60, 432 60, G03G 1520

Patent

active

RE0337706

ABSTRACT:
A heat-fixing apparatus comprising a heating roll to be brought into contact with a toner image borne on a sheet member, a pressure roll in pressed contact with the heating roll to provide a nip portion therebetween, each of the heating roll and the pressure roll being constituted by a cylindrical core coated with a heat-resistant, resilient layer and a resin surface layer having release properties, the heating roll and the pressure roll having such surface hardness as to make the nip portion substantially flat and also having substantially the same outer diameter, and the contact pressure of the rolls being such that the nip portion has a width within the range of providing good fixing capability. This heat-fixing apparatus can perform toner image fixing even on sheet members of a plurality of plies such as envelopes without creasing.

REFERENCES:
patent: 3435500 (1969-04-01), Aser et al.
patent: 3904354 (1975-09-01), Moser
patent: 4219327 (1980-08-01), Idstein
patent: 4372246 (1983-02-01), Azar et al.
patent: 4430406 (1984-02-01), Newkirk et al.
patent: 4568275 (1986-02-01), Sakurai
patent: 4632855 (1986-12-01), Conlon et al.

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