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Browse Prior Art Database

Transparency Misfeeds in a Copier

IP.com Disclosure Number: IPCOM000053054D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Bustamente, LA: AUTHOR

Abstract

A flashing error message alerts an operator to check for hard to see transparencies when clearing copier jams. The copier will not restart if the operator fails to follow preset jam-clearance procedures.

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Transparency Misfeeds in a Copier

A flashing error message alerts an operator to check for hard to see transparencies when clearing copier jams. The copier will not restart if the operator fails to follow preset jam-clearance procedures.

The opaque stripe on the leading edge of some transparencies usually comes to rest beyond the sensor, following a detach or paper-on-drum failure. Therefore, unlike a sheet of paper, the transparency is no longer detected once the machine stops. Since a transparency is difficult to see when it is on the drum"s surface, it can easily be overlooked by an operator during jam clearance. It is possible then for the operator to clear the error condition and restart the machine without removing the transparency. Here, copier logic distinguishes if the failure is caused by a sheet of paper or a transparency, and provides an error message accordingly.

In the flow diagram, after the copier stops due to a detach failure or paper-on-drum (POD) error condition, the paper-on-drum input is checked when the front door is initially opened. If the paper-on-drum sensor is still active, a sheet of paper is on the drum surface. The "Check Paper Path" message remains on until the sheet is removed and the reset button is depressed. However, if a sheet is not sensed, the misfed sheet is then determined to be a transparency.

The "Check Paper Path" console message, which is ordinarily on solid, flashes to alert the operator that a potentially serious misf...