Electrophotography – Image formation – Development
Patent
1994-11-23
1997-02-04
Ramirez, Nestor R.
Electrophotography
Image formation
Development
399298, G03G 1501
Patent
active
056004311
ABSTRACT:
This invention relates to a color image forming apparatus for forming a color image with dry developer, capable of preventing deterioration of image quality, resulting from contamination of optical components by the non-magnetic developer scattered from the developing unit. For this purpose there are provided, along the moving direction of an image bearing member effecting endless movement, charging means, optical means, first developing means utilizing developer containing a magnetic component, second developing means utilizing non-magnetic developer of a color different from that of the developer of the first developing means, and transfer means maintained in contact with or close to the image bearing member for transferring a developed image from the image bearing member to a recording material such as paper. A space containing the second developing means is enclosed by the shape of the first developing means, transfer means and image bearing member.
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Hirai Masahide
Kosaka Tohru
Nakahata Kimio
Nakamura Tatsuya
Nishimura Katsuhiko
Canon Kabushiki Kaisha
Ramirez Nestor R.
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