Image forming apparatus featuring a changeable mixing ratio...

Details Image forming apparatus featuring a changeable mixing ratio... Image forming apparatus featuring a changeable mixing ratio...

2006-10-31

2006-10-31

Gray, David M. (Department: 2852)

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

C399S044000, C399S054000

Reexamination Certificate

active

07130550

ABSTRACT:
An image forming apparatus includes image forming means for forming a superposed image on an image bearing member by using at least toners which have an identical hue and different color densities; transfer means for electrostatically transferring the superposed image on the image bearing member onto a transfer material; and changing means for changing a mixing ratio between the toners which have an identical hue and different color densities depending on information on a water content of the transfer material, thereby to prevent a deterioration of an image, particularly a halftone image even in the case where the image is formed under a specific image forming condition, such as in a low humidity environment, liable to cause image deterioration due to a discharge phenomenon in the vicinity of a transfer portion.

REFERENCES:
patent: 2003/0185601 (2003-10-01), Toyohara et al.
patent: 2000-231279 (2000-08-01), None

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