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Exothermic Laser Transfer Printing

IP.com Disclosure Number: IPCOM000085714D
Original Publication Date: 1976-May-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bruce, CA: AUTHOR [+4]

Abstract

A laser transfer printing system is described which requires less energy to achieve printing.

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

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Exothermic Laser Transfer Printing

A laser transfer printing system is described which requires less energy to achieve printing.

In laser transfer printing, laser light is focused on an ink covered ribbon. The laser energy is absorbed by the ink which is transferred to a record member (normally paper) and leaves a permanent mark. To reduce the energy required to transfer ink, an exothermic material such as a dye, filler, binder and/or explosive is added to the ribbon.

The exothermic material decomposes or reacts with other compounds present and liberates heat when irradiated by the laser light. The heat generated by the exothermic reaction raises the temperature of the ribbon, and causes an increase in the transfer of the ink over that available when the exothermic material is not present.

There are a large number of exothermic materials which can be used to supply heat to a transferable ribbon. These materials include explosives such as nitrocellulose, propellants such as ammonium perchlorate and certain dyes such as picric acid. The triphenylmethane dyes are a preferred class of exothermic dyes.

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