Developing method using a developing agent conveying sleeve of a

Details Developing method using a developing agent conveying sleeve of a Developing method using a developing agent conveying sleeve of a

1994-10-06

1996-03-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118657, 355245, 4031066, G03G 1500

Patent

active

054990831

ABSTRACT:
A developing method using a compact machine such as a copying machine for personal use, etc., employs a two component-type magnetic developing agent with small diameter photosensitive drum and small diameter developing sleeve. In order to eliminate toner falling from the drum and/or sleeve to increase toner transfer efficiency and reduce fogging, the developing agent conveying sleeve is provided with a curvature (mm.sup.-1) of from 0.2 to 0.05. The toner is specifically designed for use in the method and includes magnetic fine particles having a saturation magnetization of not smaller than 70 emu/g and hydrophobic fine silica particles added to fixing resin particles containing a coloring agent.

REFERENCES:
patent: 4950570 (1990-08-01), Sano et al.
patent: 5054419 (1991-10-01), Itaya et al.
patent: 5378572 (1995-01-01), Akiyama et al.
patent: 5422214 (1995-06-01), Akiyama et al.
patent: 5429902 (1995-07-01), Saito et al.
patent: 5437954 (1995-08-01), Saito

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