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ORIGINAL DOCUMENT SIZE SENSOR

IP.com Disclosure Number: IPCOM000025269D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

The detection of the size and position of an original document (1) on the platen glass through the use of a uniform bar-space pattern (2) on the underside of the platen cover (3) is shown in the figure. The pattern is imaged from lens (4) onto the surface of a fine scan charge coupled device (5) which provides the information concerning the original in a serial bit stream. Accordingly, a parallel to serial data conversion is accomplished. A normal illumination source is used and the system could be used statically or dynamically. Also, the system could be used in a limitless reduction/enlargement mode for copiers.