Photocopying – Including fiber optics
Patent
1976-05-07
1978-10-03
Braun, Fred L.
Photocopying
Including fiber optics
355 11, 355 55, 355 57, G03G 1528, G03B 2752, G03B 2734
Patent
active
041181182
ABSTRACT:
A xerographic copier machine capable of producing copies of an original document in a selectable magnification ratio. The machine includes an object mirror and a light source forming a scanning assembly which travels at a uniform velocity under a transparent platen on which the document to be copied is placed, face down. The object mirror reflects the illuminated image of the document toward a relay mirror moving in the same direction but at half the scan velocity, the relay mirror directing the image toward a stationary projection lens, behind which is a reflex mirror. The reflex mirror re-directs the image through the lens onto an image mirror which casts the image onto the photoreceptor surface of a rotating drum. The peripheral velocity of the drum is synchronized with the scan velocity of the scan assembly by an adjustable transmission whereby a latent image of the entire document is formed in the photoreceptor surface. In order to selectively change the magnification ratio, a retractable auxiliary lens is placed in front of the projection lens to alter the focal length of the optics, and the position of the image mirror relative to the drum is shifted to bring the image in focus on the photoreceptor surface. The synchronization transmission is adjusted to change the scan velocity of the assembly to a value appropriate to the selected magnification ratio.
REFERENCES:
patent: 3476478 (1969-11-01), Rees
patent: 3542467 (1970-11-01), Ferguson et al.
patent: 3614222 (1971-10-01), Post et al.
patent: 3778147 (1973-12-01), Reehil et al.
patent: 3829209 (1974-08-01), Buddendeck et al.
patent: 3832057 (1974-08-01), Shogren
Braun Fred L.
Ebert Michael
Universal Photocopy, Inc.
LandOfFree
Electrostatic copier machine with selectable magnification ratio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrostatic copier machine with selectable magnification ratio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatic copier machine with selectable magnification ratio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1799353