Image forming apparatus with auxiliary image forming mechanism

Details Image forming apparatus with auxiliary image forming mechanism Image forming apparatus with auxiliary image forming mechanism

1991-11-25

1993-11-09

Picard, Leo P.

Photocopying

Contact printing

Light boxes

346154, 355245, G03G 1501

Patent

active

052607607

ABSTRACT:
The present invention relates to an image forming apparatus comprising a main image forming mechanism for forming a toner image on a recording sheet based on image information and an auxiliary image forming mechanism for forming an auxiliary image on a recording sheet on which the main image is formed. The auxiliary image forming mechanism supplies charged toner to a substrate provided with a plurality of toner passage holes and selectively forms electric potential which allow or does not allow the charged toner to pass through each toner passage hole by a pair of electrodes. A predetermined image is formed with the toner passed through the toner passage holes.

REFERENCES:
patent: 4640601 (1987-02-01), Deguchi et al.
patent: 4810604 (1989-03-01), Schmidlen
patent: 5097296 (1992-03-01), Goto et al.
patent: 5128695 (1992-07-01), Maeda
Xerox Disclosure Journal, vol. 11, No. 2, (Mar. 1986).
European Search Report for EPO Application 91310886.6.

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