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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
Document File: 2 page(s) / 53K

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.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

ORIGINAL DOCUMENT SIZE SENSOR Stanley J. Wallace
Raymond W. Huggins

Volume 9 Number 2 MarchlApriI 1984

Proposed Classification
U.S. CI. 355/11 Int. C1. G03g 15/00

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159

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ORIGINAL DOCUMENT SIZE SENSOR (Cont'd)

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.

The data from the CCD (5) may be clocked out at a high rate and processed with various digital schemes to yield the original position and size. Additional signal processing to reduce detector anomalies due to possible document patterns may be necessary.

160 XEROX DISCLOSURE JOURNAL

Volume 9 Number 2 Varch/April 1984

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