Exposure process for use in a variable magnification copying mac

Details Exposure process for use in a variable magnification copying mac Exposure process for use in a variable magnification copying mac

1981-12-21

1984-03-13

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 8, 355 11, G03B 2752

Patent

active

044364156

ABSTRACT:
A photosensitive member is subject to a slitwise exposure. An imaging lens system is displaced in accordance with the magnitude of a magnification being utilized during a copying process which is switched. Disposed adjacent to the end face of a lens in the imaging lens system is at least one rectangular light shield member so that its lengthwise dimension corresponds to a slitwise scan direction. The light shield member is movable into or out of a light flux which is utilized for purpose of exposure, and is integral with the imaging lens system as the latter is displaced in accordance with a magnification being utilized during a particular copying process. During a light shielding operation, the light shield member is adapted to be disposed within or wedged partly into the light flux of exposure. As the copying magnification is switched, the amount of exposure light which is cut off by the light shield member changes, whereby the distribution of exposure light in the slit-shaped exposure station is made uniform as viewed lengthwise of the exposure station.

REFERENCES:
patent: 4080057 (1978-03-01), Nakane et al.
patent: 4139297 (1979-02-01), Hayashi et al.
patent: 4172658 (1979-10-01), Tani et al.

Affiliated with

Also associated with

Rating

Exposure process for use in a variable magnification copying mac does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure process for use in a variable magnification copying mac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure process for use in a variable magnification copying mac will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-489727