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Browse Prior Art Database

Printing Plate for Letter Press Printing

IP.com Disclosure Number: IPCOM000092212D
Original Publication Date: 1968-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Hymes, L: AUTHOR [+2]

Abstract

Etched letter-press master plate 10, including printed material 11 and half-tone material 12 is duplicated by direct pressure transfer of the image to a sheet 13 of a superplastic alloy, such as 78% zinc - 22% aluminum, by weight, that is in a completely solid state. Sheet 13 is preconditioned to exhibit minimum strength as described in U. S. Patent 3,340,101. Blank preconditioned alloy sheet 13 is pressed by platen 14 against etched plate 10 while heated to the optimum forming temperature of about 520 to 532 degrees F. A negative image is thus formed in sheet 13. The latter, when separated from sheet 10, can now be employed to manufacture duplicate letter-press plates of plastic or soft metals of a resolution closely approaching that of plate 10.

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Printing Plate for Letter Press Printing

Etched letter-press master plate 10, including printed material 11 and half- tone material 12 is duplicated by direct pressure transfer of the image to a sheet 13 of a superplastic alloy, such as 78% zinc - 22% aluminum, by weight, that is in a completely solid state. Sheet 13 is preconditioned to exhibit minimum strength as described in U. S. Patent 3,340,101. Blank preconditioned alloy sheet 13 is pressed by platen 14 against etched plate 10 while heated to the optimum forming temperature of about 520 to 532 degrees F. A negative image is thus formed in sheet 13. The latter, when separated from sheet 10, can now be employed to manufacture duplicate letter-press plates of plastic or soft metals of a resolution closely approaching that of plate 10.

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