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Multiple Copy Thermal Printing via Ultrasonic Absorption

IP.com Disclosure Number: IPCOM000085959D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Mitchell, JL: AUTHOR [+2]

Abstract

This is a printing or copying system in which thermal printing is achieved by local absorption of ultrasonic energy. This is particularly advantageous for multiple copying, since only a part of the original energy is absorbed in each copy. Multiple copies may be made with thermal transfer ribbons and carbons, or thermally triggered printing mediums.

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Multiple Copy Thermal Printing via Ultrasonic Absorption

This is a printing or copying system in which thermal printing is achieved by local absorption of ultrasonic energy. This is particularly advantageous for multiple copying, since only a part of the original energy is absorbed in each copy. Multiple copies may be made with thermal transfer ribbons and carbons, or thermally triggered printing mediums.

The figure shows a thermal printer which utilizes ultrasonic energy in the 20- 80 kHz range which is delivered locally by thin acoustic fibers.

A source of ultrasonic energy 2 applies energy to modulation apparatus 3-7, which applies the selectively modulated ultrasonic energy to acoustic fibers 8-12, respectively. The modulated ultrasonic energy is applied to a thermally transferable ink medium, such as a carbon paper 13 which is in contact with a printing medium, such as a paper 14, with the paper 14 being the contact with a carbon paper 15 which is then in contact with another sheet of paper 16, a carbon paper 17 and a paper 18. A greater number of carbon papers and paper may be utilized in a sandwich structure for multiple copy printing. Alternatively, a plurality of ultrasonic sources 2 may be used, one with each fiber, thereby dispensing with the individual modulating apparatus 3-7.

Ink is transferred to the paper from the carbon paper due to the local heating produced by the ultrasonic energy. Since only a portion of the original ultrasonic energy is abso...