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GRID STRUCTURES FOR DOCUMENT/PAPER SENSOR

IP.com Disclosure Number: IPCOM000025658D
Original Publication Date: 1987-Feb-28
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

It is advantageous to know aspects of documents to be copied such as size, and position, principally skew, with respect to an imaging area. One sensor for obtaining this information is a conducting brush in contact with a conducting grid. The passage of paper through the sensor breaks contact between part of the brush and grid and thereby provides information about width, length, and skew of the document from an assessment of those grid lines not electrically in contact with the brush. This infomation is used to reposition the document, to select the proper size copy paper, and to discharge areas of the photoreceptor not required in copying.