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Reusable, Reinkable Resistive Ribbon

IP.com Disclosure Number: IPCOM000035392D
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 3 page(s) / 45K

Publishing Venue

IBM

Related People

Afzali-Ardakani, A: AUTHOR [+3]

Abstract

This article describes means whereby a multi-use resistive printing ribbon can be realized. The Resistive Ribbon Thermal Transfer printing technology is widely used in the IBM Quietwriter printers. This technology, which is capable of very high-quality printing at relatively high speeds, presently uses a single use transfer ribbon, that is, each region of the ribbon can only be used once in printing since virtually all of the ink is transferred from a region during a print or transfer operation. Herein methods are described whereby a new resistive ribbon structure can be made which allows each region of the ribbon to be used multiple times for thermal transfer printing operations, thus a reusable resistive transfer ribbon.

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Reusable, Reinkable Resistive Ribbon

This article describes means whereby a multi-use resistive printing ribbon can be realized. The Resistive Ribbon Thermal Transfer printing technology is widely used in the IBM Quietwriter printers. This technology, which is capable of very high-quality printing at relatively high speeds, presently uses a single use transfer ribbon, that is, each region of the ribbon can only be used once in printing since virtually all of the ink is transferred from a region during a print or transfer operation. Herein methods are described whereby a new resistive ribbon structure can be made which allows each region of the ribbon to be used multiple times for thermal transfer printing operations, thus a reusable resistive transfer ribbon.

The reusable transfer ribbon structure is shown in the figure. It consists of a resistive layer which has sufficient temperature stability that it can withstand the high printing temperature for many printing cycles without exhibiting appreciable distortion. This may be achieved, for instance, by making a resistive layer that consists of conductive carbon, graphite, etc., suspended in a high temperature polymer.

The resistive layer is then coated with a thin aluminum film of approximately 1-4 ohm/square surface resistivity, which serves as a low resistance electrical return path.

A porous layer, 2-5 microns thick, is then deposited on top of the aluminum film. This porous layer, which acts as a "fountain" or retention medium for holding a thermally fusible ink, may be coated onto the aluminum film by several methods. For example, the layer can be formed by solution coating of a polyurethane fo...