Developing process and apparatus using a magnetic roller includi

Details Developing process and apparatus using a magnetic roller includi Developing process and apparatus using a magnetic roller includi

1991-04-17

1992-11-10

Pendegrass, Joan H.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355245, 355251, 355253, 430122, G03G 1509

Patent

active

051626080

ABSTRACT:
A developing process for supplying a developer to a support having an electrostatic latent image thereon by using a developer-delivering member having an electret layer and carrying out the development so that the effective fog-controlling field intensity ratio (A) defined by the following formula: ##EQU1## wherein E.sub.L represents the surface potential of the latent image area in the support having the electrostatic latent image area, E.sub.B represents the surface potential of the non-image are and E.sub.S represents the surface potential of the electret layer, is in the range of from 0.01 to 0.6.
According to this process, an image having a high density with no fog can be formed without applying a developing bias voltage.

REFERENCES:
patent: 4021106 (1977-05-01), Gaynor
patent: 4754304 (1988-06-01), Ohashi et al.
patent: 4935785 (1990-06-01), Wildi et al.
patent: 4998141 (1991-03-01), Altman

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