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Thermal Printing Ribbon

IP.com Disclosure Number: IPCOM000048828D
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Findlay, HT: AUTHOR

Abstract

A printing ribbon includes an electrically conducting ink that, when heated by electrical currents, migrates through adjacent ribbon layers to produce a mark on a receiving medium.

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Thermal Printing Ribbon

A printing ribbon includes an electrically conducting ink that, when heated by electrical currents, migrates through adjacent ribbon layers to produce a mark on a receiving medium.

Referring to the figure, a moderately conducting outer layer 10 of a ribbon 12 is composed of a resin loaded with carbon black and TEFLON*. An adjacent highly conducting layer 14 serves to receive printing current applied at the outer layer 10 by a set of printing electrodes 16 and an outer support layer 18 of a plastic such as MYLAR* serves to add mechanical strength to the composite ribbon 12. During printing, localized heating resulting from printing currents applied at the electrodes 16 causes a portion of the moderately conducting layer 10, in the areas where heating occurs, to migrate through the highly conducting layer 14 and the support layer 18 to produce marks on an adjacent receiving medium 20, such as paper. * Trademark of E. I. du Pont de Nemours & Co.

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