Photocopying – Projection printing and copying cameras – Focus or magnification control
Patent
1979-06-14
1980-07-15
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Focus or magnification control
355 67, G03B 2732, G03B 2754
Patent
active
042125316
ABSTRACT:
An aperture-controlling device in a variable-scale photocopying machine having an optical system unit which is movable to vary the scale of the photocopy relative to the original comprises an aperture-adjusting member for adjusting the width of an exposure light beam projected on a photosensitive drum, a tensioned, flexible cord connected at one end to the aperture-adjusting member, and a member following movements of the optical system unit to displace the cord at a point thereof substantially perpendicularly to its longitudinal direction thereby to actuate the aperture-adjusting member and adjust the exposure light beam width. The other end of the cord is connected to an exposure member which is adjustably movable to move the cord in forward and return movements substantially in the longitudinal direction thereof thereby to adjust the exposure light beam width independently of the adjustment thereof due to scale-varying movement of the optical system unit.
REFERENCES:
patent: 3779642 (1973-12-01), Ogawa et al.
patent: 3917393 (1975-11-01), Nier
patent: 4095884 (1978-06-01), Okamoto et al.
patent: 4125323 (1978-11-01), Ikeda et al.
Griffin Donald A.
Ricoh & Company, Ltd.
LandOfFree
Aperture-controlling device in a variable-scale photocopying 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 Aperture-controlling device in a variable-scale photocopying mac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aperture-controlling device in a variable-scale photocopying mac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-461541