Browse Prior Art Database

Dressing and Cleaning of a Printhead of a Resistive Ribbon Printer With an Abrasive Platen

IP.com Disclosure Number: IPCOM000061823D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bradley, DL: AUTHOR [+2]

Abstract

A resistive ribbon printer has its printhead periodically dressed and cleaned by an abrasive platen to overcome differential wear of electrodes of the printhead and restore print quality. Uneven wear of the forty electrodes of a printhead of a resistive ribbon printer occurs because of the non-uniform duty of each of the electrodes. The electrodes with the highest use wear the most. After some millions of characters, this non-uniform wear reduces the print quality by producing laterally displaced print elements in the positions of greatest usage. The print quality can be restored by purposely abrading the electrodes with the lowest usage.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Dressing and Cleaning of a Printhead of a Resistive Ribbon Printer With an Abrasive Platen

A resistive ribbon printer has its printhead periodically dressed and cleaned by an abrasive platen to overcome differential wear of electrodes of the printhead and restore print quality. Uneven wear of the forty electrodes of a printhead of a resistive ribbon printer occurs because of the non-uniform duty of each of the electrodes. The electrodes with the highest use wear the most. After some millions of characters, this non-uniform wear reduces the print quality by producing laterally displaced print elements in the positions of greatest usage. The print quality can be restored by purposely abrading the electrodes with the lowest usage. Dressing and cleaning of the printhead can be accomplished by performing an abrading operation through the addition of a fine abrasive material, such as silicon carbide, for example, having a thickness of about ten microns into the surface material of the platen. At various intervals and with no ribbon or paper in the printer, an operator would depress a code key. This would cause the printhead to be wiped across the abrasive platen a predetermined amount to correct the differential wear by grinding the printhead against the bare platen to even the wear of the electrodes.

1