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Printing by Means of a Laser Beam

IP.com Disclosure Number: IPCOM000095856D
Original Publication Date: 1964-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Roshon, DD: AUTHOR [+2]

Abstract

By placing a sheet 1 of paper in contact with a sheet 2 having a carbon wax coating 2a and then directing a laser beam of sufficient energy to the exposed surface of sheet 1, a transfer of the carbon wax coating 2a from the sheet 2 to the sheet 1 results. This transfer is caused by the fact that the carbon in the carbon wax coating 2a acts as a black body which, because of its high absorption characteristic, absorbs and concentrates enough energy to cause evaporation of the coating in the coating area influenced by the beam.

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Printing by Means of a Laser Beam

By placing a sheet 1 of paper in contact with a sheet 2 having a carbon wax coating 2a and then directing a laser beam of sufficient energy to the exposed surface of sheet 1, a transfer of the carbon wax coating 2a from the sheet 2 to the sheet 1 results. This transfer is caused by the fact that the carbon in the carbon wax coating 2a acts as a black body which, because of its high absorption characteristic, absorbs and concentrates enough energy to cause evaporation of the coating in the coating area influenced by the beam.

The evaporated coating is impelled against and unites with the contacting surface of sheet 1. The low absorption characteristic of sheet 1 permits the laser beam to pass through it without damage to the sheet.

Characters or other printing configurations can be printed by (1) deflecting the beam as in character writing, (2) employing a matrix of spots, and (3) employing a configured beam which has a cross sectional shape similar to the character to be printed.

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