Image formation apparatus

Details Image formation apparatus Image formation apparatus

1998-11-13

1999-10-26

Pendegrass, Joan

Electrophotography

Control of electrophotography process

Control of developing

399138, 399315, G03G 1500, G03G 1508, G03G 1516

Patent

active

059742780

ABSTRACT:
An image formation apparatus comprises an image bearing member, developing means for developing by use of toner the electrostatic image formed on the image bearing member, transfer charging means for transferring the toner image from the image bearing member to a transfer material in the transfer position, and separation means for de-electrifying the transfer material for separating the transfer material from the image bearing member. Then, after the toner image formed on the transfer material for the first time is fixed, the toner image is formed on the same transfer material for the second time. For this apparatus, modifying means is further provided for modifying the development conditions of the first toner image and the second toner image formed on the transfer material, and modifying the adhesive amount of fogging toner adhering to the image background of the toner image on the image bearing member. With the structure thus arranged, it is made possible to prevent the defective separation and re-transfer, and at the same time, to reduce the development fog as much as possible for a significant enhancement of image formation.

REFERENCES:
patent: 5128718 (1992-07-01), Mizoguchi
patent: 5170210 (1992-12-01), Saruwatari
patent: 5774762 (1998-06-01), Takemoto et al.
patent: 5845171 (1998-12-01), Ko

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