Multiple color image forming apparatus and method

Details Multiple color image forming apparatus and method Multiple color image forming apparatus and method

2006-04-04

2006-04-04

Brase, Sandra L. (Department: 2852)

Electrophotography

Image formation

Development

C430S114000

Reexamination Certificate

active

07024139

ABSTRACT:
A liquid developer electrophotographic apparatus and method for developing one or more successive color images on a previous color image formed on a latent image retaining body, wherein peeling off the prior color image is prevented by establishing a reversible electrophoretic transfer efficiency of toner particles in the prior toner image to be not greater than 60% in the liquid developer for the successive color image while applying an electrical potential difference between the latent image retaining body and a developing electrode for the successive developing step(s). A resin content of the toner particles forming the previous color image may be selected to achieve the reversible electrophoretic transfer efficiency of 60% or less. Alternatively, or in conjunction with the selected resin content, a heater disposed adjacent to a developing station of the successive color image may be arranged to heat the already developed image or the surface of the latent image retaining body so that the toner particles of the prior developed image has the reversible electrophoretic transfer efficiency of 60% or less.

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Hitoshi Yagi et al., “Image-on-Image Color Process Using Liquid Toner”, IS&Ts NIP 16:2000 International Conference on Digital Printing Technologies, pp. 246-250.

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