Fixing device with temperature compensation in an image forming

Details Fixing device with temperature compensation in an image forming Fixing device with temperature compensation in an image forming

1992-03-30

1993-06-29

Grimley, A. T.

Photocopying

Contact printing

Light boxes

219216, 355282, 432 60, G03G 1520

Patent

active

052239012

ABSTRACT:
A fixing device for an image forming apparatus comprising a heat roller including a hollow roller body and a heater mounted through the roller body. The heater has a plurality of heating portions arranged at equal intervals along the axis thereof. The heater is shifted in the direction opposite to an air flow generated by an exhaust fan with respect to a recording-sheet contact area of the roller body so as to heat the end portion of the roller body located upstream of the air flow sufficiently enough to compensate for the drop of the temperature at the end portion of the recording-sheet contact area located upstream of the air flow cooled below a predetermined temperature by the unheated air flow.

REFERENCES:
patent: 3765828 (1973-10-01), Lux
patent: 4001545 (1977-01-01), Wada et al.
patent: 4309591 (1982-01-01), Kanoto et al.
patent: 4618240 (1986-10-01), Sakurai et al.
patent: 4780078 (1988-10-01), Masui
patent: 5115119 (1992-05-01), Adachi et al.

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