Photocopying – Contact printing – Light boxes
Patent
1988-04-22
1989-08-22
Prescott, A. C.
Photocopying
Contact printing
Light boxes
355328, 355245, G03G 1500, G03G 1501
Patent
active
048600490
ABSTRACT:
An image forming apparatus has a rotatable image carrier for carrying electrostatic latent images thereon and a scanner having a prescribed scanning direction for exposing the image carrier to form the electrostatic latent images corresponding to the pattern of an original document on the image carrier. The apparatus includes a designating section for designating first and second rectangular areas of the original document to be copied, and a first and second developing units for converting the electrostatic latent images corresponding to the first and second areas, respectively, into first and second different color toner images on the image carrier. The first and second developing units are selectively actuated to form the first and second color toner images alternatively on the image carrier, the first and second color toner images are transferred from the image carrier onto a sheet having a defined length and width corresponding to the length and width of the original document in a single rotation of the image carrier when the width of both of the first and second areas correspond to the width of the sheet.
REFERENCES:
patent: 4690543 (1987-09-01), Watanabe
patent: 4707713 (1987-11-01), Ayata et al.
patent: 4708486 (1987-11-01), Watanabe
patent: 4710016 (1987-12-01), Watanabe
patent: 4740811 (1888-04-01), Watanabe
patent: 4761673 (1988-08-01), Watanabe et al.
patent: 4777510 (1988-10-01), Russel
Mizuma Takashi
Toshimitsu Kenshi
Kabushiki Kaisha Toshiba
Prescott A. C.
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