Browse Prior Art Database

Low Cost Escapement Motion Detector for a Printer

IP.com Disclosure Number: IPCOM000041078D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Albaugh, V: AUTHOR

Abstract

An arrangement is described to eliminate the possibility of scorching paper in a printer by sensing that escapement has stopped and eliminating the heating current for the print head.

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Low Cost Escapement Motion Detector for a Printer

An arrangement is described to eliminate the possibility of scorching paper in a printer by sensing that escapement has stopped and eliminating the heating current for the print head.

A problem exists on the resistive ribbon thermal transfer type printer if the escapement is stalled and the print head continues to heat the ribbon and paper in one location, scorching or possibly burning the paper. Since the drive for the ribbon is engaged when printing, its rotation indicates that the condition for scorching does not exist. By modulating a contact to the grounded grit roller on the ribbon drive capstan as it rotates, a stalled condition can be sensed by an absence of a pulse during printing.

Anonymous.

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