Image-forming process and magnetic developing sleeve for use in

Details Image-forming process and magnetic developing sleeve for use in Image-forming process and magnetic developing sleeve for use in

1991-03-19

1992-12-15

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430 55, 430 33, G03G 1344, G03G 1324

Patent

active

051716526

ABSTRACT:
In forming an image by the simultaneous light exposure-transfer process using a photosensitive toner, a light-exposed electricity-removed toner is effectively scraped without bad influences on the image density, and the fog density is drastically reduced.
In subjecting a photosensitive toner layer to imagewise light exposure to form a combination of an electricity-removed toner and a charged toner and removing the electricity-removed toner from an electroconductive substrate by contact with a magnetic brush, the flux density distribution of a main developing pole in a developing sleeve is set so that a two-peak flux density distribution having two peaks separated on the upstream side and downstream side with the vicinity of the nip position between the developing sleeve and electroconductive substrate being as the center is produced in the tangential direction and the value of the peak on the downstream side is smaller than the value of the peak on the upstream side.

REFERENCES:
patent: 5031570 (1991-07-01), Hays et al.

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