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METHOD FOR COPYING 11 INCH BY 17 INCH ORIGINAL DOCUMENTS

IP.com Disclosure Number: IPCOM000025000D
Original Publication Date: 1983-Apr-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

Frequently, an electrophotographic copying machine using a flash illumination system cannot reproduce or copy an original document which is 11 inches by 17 inches, onto an 11 inch by 17 inch sheet of copy paper because of the size limitations of both the photoreceptor belt width and the available lengthwise imaging area. In order to achieve this, the 11 inch by 17 inch original document is advanced, short edge forward, to the registration edge on the platen of the printing machine. The optical system is flashed at times such that the first flash occurs when the first half of the document, i.e, 8 1/2 inches by 11 inches, is exactly in the image area on the photoreceptor belt. The second flash occurs when the second half of the original document is in the identical position in the imaging area. The document transport, i.e., a recirculating document handler, moves at substantially the same speed as the photoconductive belt. The machine logic insures that the timing for the flash illumination of each half of the original document is in synchronism with belt movement.