Browse Prior Art Database

Sheet Feed Control

IP.com Disclosure Number: IPCOM000042153D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Nguyen, HH: AUTHOR [+2]

Abstract

This article describes a technique providing the dual function of causing feed or eject to a form feed button as a function of the presence or absence of a sheet in the paper path. In a high speed printer for use with data processing or word processing applications having an automatic sheet feed device attached thereto, the form feed button previously used with tractor feed control may be used to alternately feed and eject sheets. That is, when there is a sheet in the paper path, depression of the form feed button causes that sheet to be ejected. When no paper is detected in the sheet feed, depression of the form feed button causes a sheet to be fed from the input hopper. These actions are implemented in software by checking previously set flags indicating either paper path condition.

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Sheet Feed Control

This article describes a technique providing the dual function of causing feed or eject to a form feed button as a function of the presence or absence of a sheet in the paper path. In a high speed printer for use with data processing or word processing applications having an automatic sheet feed device attached thereto, the form feed button previously used with tractor feed control may be used to alternately feed and eject sheets. That is, when there is a sheet in the paper path, depression of the form feed button causes that sheet to be ejected. When no paper is detected in the sheet feed, depression of the form feed button causes a sheet to be fed from the input hopper. These actions are implemented in software by checking previously set flags indicating either paper path condition. The advantage of this new technique lies in the prevention of potential paper jam problems which would occur when a sheet is fed and left to remain around the platen without being printed.

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