Microfilm copying machine

Details Microfilm copying machine Microfilm copying machine

1982-07-09

1984-10-02

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 69, G03B 2772

Patent

active

044744609

ABSTRACT:
A microfilm copying machine is provided with a variable width exposure slit controlled by a magnification setting, for decreasing the range of the light output quantity required of the light source. The device may also include a mechanism by which the exposure is varied in response to changes in magnification factor, the density of a film and variations in the quantity of light which reaches the photo-sensitive drum or like device.

REFERENCES:
patent: 3832058 (1974-08-01), Gusovius
patent: 3898676 (1975-08-01), Hosoe et al.
patent: 4125323 (1978-11-01), Ikeda et al.
patent: 4212531 (1980-07-01), Shimomura
patent: 4279497 (1981-07-01), Satomi

Affiliated with

Also associated with

Rating

Microfilm copying machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microfilm copying machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microfilm copying machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-524616