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FLASH TRANSFER OF LIQUID INK FROM A BACK SCREENED DONOR

IP.com Disclosure Number: IPCOM000023297D
Original Publication Date: 1977-Jun-30
Included in the Prior Art Database: 2004-Mar-29
Document File: 2 page(s) / 286K

Publishing Venue

Xerox Disclosure Journal

Abstract

A means for laser writing with increased resolution is dis-closed. In laser induced flash transfer, a transparent backing layer is coated with an ink layer, and a receiver sheet is positioned close to the ink layer. A writing laser strikes the ink layer through the transparent layer with suf-ficient energy to cause the ink to transfer to the receiver sheet.

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XEROX DISCLOSURE JOURNAL

FLASH TRANSFER OF LIQUID INK
FROM A BACK SCREENED DONOR
William L. Goffe

\\~NK~N \\ \\ SCREEN

RECE~VER SHEET

Proposed Classification
U.S. Cl, 2l9/121L
mt. Cl. B23k 9/00

SCREEN-
HOLE

A means for laser writing with increased resolution is dis~
closed. In laser induced flash transfer, a transparent
backing layer is coated with an ink layer, and a receiver
sheet is positioned close to the ink layer. A writing laser
strikes the ink layer through the transparent layer with suf~
ficient energy to cause the ink to transfer to the receiver
sheet.

A problem with flash transfer has been definition in the image
created by the transfer. Previous attempts to solve this
problem have involved focusing lasers to produce a small spot
size of high density and adjusting the ink layer thickness to
match the laser beam density. This method is somewhat complex
and is limited by the requirement of small spacing between the
ink layer and the receiver sheet.

In the concept shown, a screen or gravure type structure is
suggested as a donor means to supply the ink to be trans~-
ferred. The screen enables higher resolution without unde~
sirable concentration of the laser beam. Ink can be metered
between the screen and the backing to avoid doctoring and
cleaning problems.

Volume 2 Number 3 May/June 1977 33

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                   XEROX DISCLOSURE JOURNAL
34 Volume 2 Number 3 May/June 1977

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