Image forming method and apparatus therefor

An image forming method of the present invention comprises: a first toner image formation process for forming a first toner image by forming, on a latent image carrier, a first latent image which corresponds to a first image and developing the first latent image by a first toner charged to one polar...

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Bibliographic Details
Main Authors SUMIKAWA, TAKESHI, NOAMI, TSUNEO, ADACHI, KOJI, MARUYAMA, KAZUO, YAMAMOTO, TOSHIRO, FURUYA, NOBUMASA
Format Patent
LanguageEnglish
French
German
Published 06.04.1994
Edition5
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:An image forming method of the present invention comprises: a first toner image formation process for forming a first toner image by forming, on a latent image carrier, a first latent image which corresponds to a first image and developing the first latent image by a first toner charged to one polarity through a development selected from normal and reverse developments so as to correspond to the polarity of the first toner; a second toner image formation process for forming a second toner image by forming, on the latent image carrier, a second latent image which corresponds to a second image and developing the second latent image by a second toner charged to the other polarity by the other development while applying a developing bias; and a transfer treatment process for simultaneously transferring said first and second toner images to a transfer medium; wherein said developing bias VB2 satisfies the following equations: ¦VT1 - VB2¦ > ¦VH2 - VB2¦ (1) ¦VT1 - VB2¦ > ¦VT1 - VH2¦ (2) where a surface potential of said first toner image is VT1, a background potential in said second toner image forming process is VH2, and the developing bias in said second toner image forming process is VB2.
Bibliography:Application Number: EP19880109255