Image forming apparatus

Details Image forming apparatus Image forming apparatus

1996-07-09

1998-05-26

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358501, 358502, 358503, 358504, 347 3, 347 4, 347 5, 347 6, 347 22, 347153, 347187, 399 99, 399101, G06F 1500, H04N 146, H04N 1034, B41J 2938

Patent

active

057580383

ABSTRACT:
An image forming apparatus has a plurality of image forming units for forming, on an image receiving member such as a transfer sheet, toner images of a plurality of different colors such as magenta, cyan, yellow and black. Each of the image forming units includes a photosensitive drum serving as an image carrier, a developing device for developing an electrostatic latent image carried by the image carrier to form a color toner image, and a transfer device for transferring the toner image to the image receiving member. The developing device in the image forming unit for forming on the image receiving member the toner image of an (i+1)-th color is of the type capable of simultaneously performing both development and removal of residual toner. The transfer currents T.sub.i and T.sub.i+1 employed by the transfer units which perform transfer of the toner images of an i-th color and the (i+1)-th color satisfy the following condition (1). The sphericity factor SF of the toner used in at least one of the image forming units, defined by the following equation (2) satisfies the following condition (3):

REFERENCES:
patent: 5646718 (1997-07-01), Suwa et al.

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