Color image forming apparatus having toner image forming device

Details Color image forming apparatus having toner image forming device Color image forming apparatus having toner image forming device

1994-05-31

1996-04-16

Braun, Fred L.

Photocopying

Contact printing

Light boxes

G03G 1520

Patent

active

055087973

ABSTRACT:
A color image forming apparatus which forms a monochromatic toner image or a toner image in a plurality of colors and which can considerably reduce power consumption, while preventing an offset at the time of fixing a toner image. The color image forming apparatus includes a toner image forming device for forming a monochromatic toner image or a toner image in a plurality of colors on a recording medium; first heating device, located on a toner image side of the recording medium for fixing the toner image on the recording medium by heat; second heating device located on an opposite side to the toner image side of the recording medium; and a controller for making an amount of power supply to the second heating device constant and changing an amount of power supply to the first heating device depending on whether the toner image is monochromatic or is in a plurality of colors, while making a set temperature of the first heating device constant. The controller sets the power supply of the fixing or fusing device as a function of whether the toner image is a monochromatic, plural colors or full colored toner image.

REFERENCES:
patent: 4549803 (1985-10-01), Ohno et al.
patent: 5177552 (1993-01-01), Isogai et al.
patent: 5216225 (1993-06-01), Muto et al.
patent: 5327202 (1994-07-01), Nami et al.

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