Fixing unit for picture image forming equipment having a three l

Details Fixing unit for picture image forming equipment having a three l Fixing unit for picture image forming equipment having a three l

1990-10-25

1993-01-19

Grimley, A. T.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219216, 355285, 355290, G03G 1520

Patent

active

051808994

ABSTRACT:
A fixing unit for picture image forming equipment including a heating roller and a pressure roller, fixes unfixed picture images formed on paper by applying heat thereto. The fixing unit for a picture image forming equipment includes a pressure roller having a structure consisting of three layers, namely, a silicone sponge layer, a silicone rubber layer, and a relatively hard tubular layer, which are arranged in the stated order outwards from the central part to the outermost shell. The tubular layer is a tetrafluoroethylene fluorocarbon polymer layer having a thickness in the range from 30 .mu.m to 70 .mu.m. The silicone sponge layer has a thickness in the range of 50% to 60% of the outside diameter of the pressure roller.

REFERENCES:
patent: 3913521 (1975-10-01), Bar-on
patent: 4640600 (1987-02-01), Hirabayashi et al.
patent: 4883715 (1989-11-01), Kuge et al.

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