Electronic copying apparatus having function of partially changi

Details Electronic copying apparatus having function of partially changi Electronic copying apparatus having function of partially changi

1988-03-21

1989-08-15

Moses, R. L.

Photocopying

Contact printing

Light boxes

355210, 355265, 355214, G03G 1500

Patent

active

048579580

ABSTRACT:
An electronic copying apparatus of this invention has a function of partially changing a tone of an image reproduced from an original image. In this apparatus, a predetermined range of an original placed on an original table is designated by a spot light source, and the original is optically scanned by an exposure lamp. An optical image obtained by the exposure lamp is focused on a photoconductive drum having a predetermined surface potential by an optical system, and is developed by a developer constituting a developer unit. The image developed by the developer is transferred to a paper sheet by a transfer charger. An image outside the predetermined range designated by the spot light source is formed on the paper sheet in one tone, and an image inside the predetermined range is erased by an erasure array. The surface potential of the photoconductive drum is changed upon an instruction from a main processor. The image inside the predetermined range is developed and is then transferred to the paper sheet by the transfer charger. In this case, the image inside the predetermined range is formed in the other tone.

REFERENCES:
patent: 4685794 (1987-08-01), Watanabe
patent: 4688923 (1987-08-01), Kohyama
patent: 4761673 (1988-08-01), Watanabe et al.

Affiliated with

Also associated with

Rating

Electronic copying apparatus having function of partially changi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic copying apparatus having function of partially changi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic copying apparatus having function of partially changi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-125261