Developing device including rotatable resilient roller for suppl

Details Developing device including rotatable resilient roller for suppl Developing device including rotatable resilient roller for suppl

1992-09-01

1994-02-15

Grimley, A. T.

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Contact printing

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118653, 118656, 355253, G03G 1506

Patent

active

052871509

ABSTRACT:
A rotatable developing roller for carrying out a developer from a vessel containing one-component developer to be conveyed to a developing portion is provided with a developing roller a resilient roller in contact with and rotatable within the vessel. This resilient roller is an independently-porous foam roller having an Asker C hardness of 8.degree. to 15.degree., and is placed into contact with the developing roller so that the variation in a radial direction is 0.5 mm to 1.5 mm. In another aspect, under a surface layer of a cellular material, there is provided an intermediate layer of a cellular material having a compression resiliency lower than that of the surface layer.

REFERENCES:
patent: 4827305 (1989-05-01), Enoguchi et al.
patent: 5030996 (1991-07-01), Tajima et al.
patent: 5075728 (1991-12-01), Kobayashi et al.
patent: 5086728 (1992-02-01), Kinoshita
patent: 5170213 (1992-12-01), Yamaguchi et al.
patent: 5177323 (1993-01-01), Kohyama

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