The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 1978
Filed:
May. 07, 1976
Robert M Barto, Jr, Wyckoff, NJ (US);
Universal Photocopy, Inc., Mountainside, NJ (US);
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.