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SCANNER DOCUMENT ABSENCE CODE SYSTEM

IP.com Disclosure Number: IPCOM000026403D
Original Publication Date: 1991-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 65K

Publishing Venue

Xerox Disclosure Journal

Abstract

A scanner document absence code system used in an electronic imaging system to detect documents left on a platen glass is disclosed. When manual handling of a document to be imaged is desired, the document is manually positioned in a special registration position on the platen glass. Over one corner of the manual registration position is a signal generating optical indicia. This optical indicia is a numbered bar code pattern on a stationary baffle, or other overlying surface, upstream of a document feeder transport, and preferably located at a start-of-scan area. An electronic imager maybe partially or entirely optically blocked from reading the bar code pattern by a document present in that manual registration position. Using a bar code reduces the probability of error in false detection when a document is not present.

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XEROX DISCLOSURE JOURNAL

SCANNER DOCUMENT ABSENCE Proposed Classification CODE SYSTEM U.S. C1.355/308 James R. Graves
Int. James E. Summers C1. G03g 21/00

A scanner document absence code system used in an electronic imaging system to detect documents left on a platen glass is disclosed.

When manual handling of a document to be imaged is desired, the document is manually positioned in a special registration position on the platen glass. Over one corner of the manual registration position is a signal generating optical indicia. This optical indicia is a numbered bar code pattern on a stationary baffle, or other overlying surface, upstream of a document feeder transport, and preferably located at a start-of-scan area. An electronic imager maybe partially or entirely optically blocked from reading the bar code pattern by a document present in that manual registration position. Using a bar code reduces the probability of error in false detection when a document is not present.

When automatic feeding of a document is desired, the document can be placed into the document feeder and fed onto the platen in a different registration position in which no portion of that document is interposed between the bar code and the imager. Depending upon whether a manual or automatic mode of operation is desired by an operator, the imager can may or may not read the bar code. Thus the imager provides a control signal to control the document feeder and/or enable other desired functions....