Image forming apparatus for forming plural toner images on photo

Details Image forming apparatus for forming plural toner images on photo Image forming apparatus for forming plural toner images on photo

1997-11-13

1999-11-09

Smith, Matthew S.

Electrophotography

Control of electrophotography process

Control of exposure

399 40, 399 50, 399178, G03G 15043

Patent

active

059830450

ABSTRACT:
The present invention aims to improve image quality in an image forming apparatus in which plural color toner images are formed on a photosensitive member and the toner images are collectively transferred onto a transfer material, and provides such an image forming apparatus that includes a first charge member for charging the photosensitive member, a digital optical system for exposing image information on the photosensitive member, a first developing device for inversion-developing a first latent image formed on the photosensitive member with first toner, a second charge member for charging the photosensitive member developed by the first developing member, a second developing member for developing a second latent image formed on the photosensitive member by exposing second image information onto the charged photosensitive member, with second toner, and a transfer means for collectively transferring first and second toner images formed on the photosensitive member onto a transfer material, and wherein an exposure amount of each pixel at a non-image portion in second exposure is made substantially equal to or greater than an exposure amount at a non-image portion in first exposure.

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patent: 4583839 (1986-04-01), Suzuki
patent: 4660961 (1987-04-01), Kuramoto et al.
patent: 4755850 (1988-07-01), Suzuki et al.
patent: 5671468 (1997-09-01), Yamamoto et al.

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