Browse Prior Art Database

TRANSPARENCY DETECTION IN PRINTING MACHINES

IP.com Disclosure Number: IPCOM000026964D
Original Publication Date: 1994-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 92K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an apparatus for detecting media conflicts involving transparencies in a printing machine. Transparencies, for example, can be inadvertently loaded in a paper tray of the printing machine after a user has programed a print job with plain paper and the paper tray is believed to be or is programmed to be loaded with plain paper but is in reality loaded with transparencies. Once the apparatus detects a conflict with programmed media and media loaded in paper trays, a controller in the printing machine provides an indication of the problem to the operator of the printing machine.

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XEROX DISCLOSURE JOURNAL

TRANSPARENCY DETECTION IN PRINTING MACHINES
Gerald M. DeVito

14 8A

Proposed Classification US. C1.355/308
Int. C1. G03g 21/00

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XEROX DISCLOSURE JOURNAL - Vol. 19, No. 4 July/August 1994 331

[This page contains 1 picture or other non-text object]

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TRANSPARENCY DETECTION IN PRINTING MACHINES(Cont'd)

Disclosed is an apparatus for detecting media conflicts involving transparencies in a printing machine. Transparencies, for example, can be inadvertently loaded in a paper tray of the printing machine after a user has programed a print job with plain paper and the paper tray is believed to be or is programmed to be loaded with plain paper but is in reality loaded with transparencies. Once the apparatus detects a conflict with programmed media and media loaded in paper trays, a controller in the printing machine provides an indication of the problem to the operator of the printing machine.

More specifically, the disclosed apparatus, which is located in a printing machine and shown in the Figure, first detects when media 4 (e.g. transparency or plain paper) is output from paper trays 10,11 or 12 using lead edge sensor 6. Once media 4 is detected, the apparatus activates transmissive sensor 8 (A and B) located near jam sensor 14 to determine whether media 4 is paper or transparency. The information from transmissive sensor 8 is processed by a controller located in the printing machine to provide information indicating w...