Fixing apparatus for reducing image distortion

Details Fixing apparatus for reducing image distortion Fixing apparatus for reducing image distortion

1995-10-10

1997-03-25

Grimley, Arthur T.

Electrophotography

Image formation

Fixing

219216, G03G 1520

Patent

active

056149999

ABSTRACT:
A fixing apparatus comprising built-in heating means, a heat-fixing roll which is driven to rotate, and an endless pressure belt which is stretched along a plurality of rolls and made to be contact and wound around the heat-fixing roll, wherein the heat-fixing roll is provided with a resilient layer on the peripheral surface thereof; one of the plurality of rolls for stretching the pressure belt is a pressure roll which is located in a press contact portion where the pressure belt is forced to be contact with the heat-fixing roll on the downstream side in the direction of rotation of the heat-fixing roll and pressed against the heat-fixing roll so that the resilient layer of the heat-fixing roll undergoes compressional deformation; an auxiliary pressure roll is provided on the upstream side of the press contact portion and forced to be contact with the heat-fixing roll via the pressure belt; and a soft resilient layer formed of material not harder than what is used to form the resilient layer of the heat-fixing roll is formed on the peripheral surface of the auxiliary pressure roll.

REFERENCES:
patent: 5177550 (1993-01-01), Uehara et al.
patent: 5345300 (1994-09-01), Uehara et al.
patent: 5359401 (1994-10-01), Uehara et al.
patent: 5436430 (1995-07-01), Baruch et al.
patent: 5530556 (1996-06-01), Miura et al.

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