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Moisture Aided Character Liftoff

IP.com Disclosure Number: IPCOM000051606D
Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Findlay, HT: AUTHOR

Abstract

For many printing techniques, it is not practical to impact for liftof erase in the pattern of the character to be erased. This article is directed to the idea of premoistening the printed character which, it has been found, weakens the attachment of the ink to paper sufficiently to permit liftoff with a wiping pressure across the character.

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Moisture Aided Character Liftoff

For many printing techniques, it is not practical to impact for liftof erase in the pattern of the character to be erased. This article is directed to the idea of premoistening the printed character which, it has been found, weakens the attachment of the ink to paper sufficiently to permit liftoff with a wiping pressure across the character.

More specifically, it has been found that a light moistening of a printed character, for a wide variety of printing inks, weakens the ink bond to paper yet does not seriously reduce the liftoff effect of tapes such as those using methyl ester of natural rosins. By premoistening the character area with a wick or spray, the character is lifted off using the wiping action of a flat blade across the liftoff tape rather than an impact in the pattern of the character. This use of a wiping action is especially advantageous for that type of matrix ink transfer printer that does not normally include any impacting means that could be utilized for erasure operations.

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