Browse Prior Art Database

Resistive Layer for Thermal Ribbon

IP.com Disclosure Number: IPCOM000045862D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bowlds, PA: AUTHOR [+3]

Abstract

Resistive transfer media of the general kind described in U.S. Patents 4,103,066 and 4,320,170 have a resistive layer serving as a substrate to a layer of heat-flowable marking material. Current is applied to the resistive layer from electrodes in a printhead, and the resulting electrical heating causes the marking material to flow. Where the resistive layer is MAKROLON 5905(Trademark of Farbenfabriken Bayer AG.) polycarbonate, debris formulation and ribbon breakage are minimized.

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

Page 1 of 1

Resistive Layer for Thermal Ribbon

Resistive transfer media of the general kind described in U.S. Patents 4,103,066 and 4,320,170 have a resistive layer serving as a substrate to a layer of heat-flowable marking material. Current is applied to the resistive layer from electrodes in a printhead, and the resulting electrical heating causes the marking material to flow.

Where the resistive layer is MAKROLON 5905(Trademark of Farbenfabriken Bayer AG.) polycarbonate, debris formulation and ribbon breakage are minimized.

Conductive carbon black in the amount of 27 to 30 percent by weight is dispersed in the polycarbonate as the only other essential ingredient. The polycarbonate is a predominately linear polymer of 200,000 weight average molecular weight. This resistive layer provides minimal ribbon breakage and long, reliable printhead operation.

1