Browse Prior Art Database

Stray Original Detection

IP.com Disclosure Number: IPCOM000045581D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Conly, DJ: AUTHOR [+2]

Abstract

In a document-handling machine such as a copier, occasionally the last original is left in the processing station when the job is finished. Usually, this happens where the job has been a manual job rather than one which has utilized the document feeder. Where the stray original is left in the processing station, the next job could result in mangled originals where the first document is fed through the document feeder to the processing station. To prevent this, the machine is provided with a method of operation which involves feeding any stray original left in the processing station out of the station to an exit sensor where the machine declares an error and stops the operation, forcing the operator to take some appropriate action.

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Stray Original Detection

In a document-handling machine such as a copier, occasionally the last original is left in the processing station when the job is finished. Usually, this happens where the job has been a manual job rather than one which has utilized the document feeder. Where the stray original is left in the processing station, the next job could result in mangled originals where the first document is fed through the document feeder to the processing station. To prevent this, the machine is provided with a method of operation which involves feeding any stray original left in the processing station out of the station to an exit sensor where the machine declares an error and stops the operation, forcing the operator to take some appropriate action.

Fig. 1 shows a document feed unit for a copier machine wherein a stack of documents can be placed on an automatic document feed (ADF) tray 10 and fed automatically one at a time to a processing station, the document glass 31. Similarly, sheets can be fed one at a time to glass 31 through semiautomatic document feed (SADF) tray 22 by manually placing a next sheet on tray 22 after the preceding sheet is automatically moved to glass 31. Upon the completion of a copying operation, he documents are fed from glass 31 to an exit tray 33 by rollers 34 and in the process the exiting document is sensed by the exit sensor
35.

For the case where a stray original document has been left on the document glass, that document wi...