Photocopying – Contact printing – Light boxes
Patent
1991-02-13
1992-06-16
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355245, 430 45, 430111, G03G 1501
Patent
active
051228432
ABSTRACT:
An image forming apparatus includes an image support member; a first electrostatic latent image forming device for forming a first electrostatic latent image on the image support member; a first developing device for developing the first electrostatic latent image with first toner; a second electrostatic latent image forming device for forming a second electrostatic latent image on the image support member; and a second developing device for developing the second electrostatic latent image with second toner; the second toner having a color different from that of the first toner and having charging characteristics relative to carrier, identical with those of the first toner; the second toner having an average particle diameter larger than that of the first toner.
REFERENCES:
patent: 4351604 (1982-09-01), Karasawa et al.
patent: 4416533 (1983-11-01), Tokunaga et al.
patent: 4819028 (1989-04-01), Abe
patent: 4822702 (1989-04-01), Hoshi et al.
patent: 4833505 (1989-05-01), Furuya et al.
patent: 4935782 (1990-06-01), Kohyama
patent: 4992831 (1991-02-01), Kunishi
patent: 5009973 (1991-04-01), Yoshida et al.
Oka Tateki
Toda Kunio
Yokoyama Tomoaki
Beatty Robert
Grimley A. T.
Minolta Camera Kabushiki Kaisha
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