Browse Prior Art Database

IMPROVED USAGE OF DYE DIFFUSION THERMAL TRANSFER DONOR FILMS

IP.com Disclosure Number: IPCOM000026882D
Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 136K

Publishing Venue

Xerox Disclosure Journal

Abstract

The present disclosure describes a method of improving the efficiency of ink donor rolls used in a dye diffusion thermal transfer printer. In particular, the disclosure is directed to intelligent algorithms that maximize the utilization of the ink donor rolls in a dye diffusion thermal transfer printer, and a machine architecture which enables the use of such algorithms.

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XEROX DISCLOSURE JOURNAL

IMPROVED USAGE OF DYE DIFFUSION THERMAL TRANSFER U.S. C1.430/200 DONOR FILMS
Michael A. Butler
Thomas Henderson
Paul W. Morehouse, Jr.

Proposed Classification

Int. C1. G03c 8/00

The present disclosure describes a method of improving the efficiency of ink donor rolls used in a dye diffusion thermal transfer printer. In particular, the disclosure is directed to intelligent algorithms that maximize the utilization of the ink donor rolls in a dye diffusion thermal transfer printer, and a machine architecture which enables the use of such algorithms.

Dye diffusion thermal printers represent a marking technology capable of rendering high quality color images. The technology is capable of moderately high spatial resolutions, on the order of 300 spots per inch (spi), and essentially continuous tone printing with 256 levels of gray. As a technology, dye diffusion thermal transfer printers have generally not been viewed as competitive with dry powder marking using electrostatic latent images because of speed and cost-per-copy considerations. However, the dye diffusion thermal transfer technology is superior relative to dry powder techniques in the area of process stabilization, primarily as a result of non-stochastic processes which are inherently easier to control.

A significant contributor to the cost of operation of a dye diffusion thermal transfer printer is the cost associated with the inks used to place marks on paper. In a typical low-cost machine, a multicolor print is made with multiple passes of the paper across a single thermal print head. During each pass the paper is transported across a surface of the print head in synchronization with a panel of the donor roll. Generally, the donor roll consists of an ink deposited onto a supporting substrate. The donor material is interposed between the thermal print head and the paper. As regions of the image requiring that ink be transferred pass over the thermal print head, it is electronically pulsed so as to heat selected elements thereof, consequently transferring the ink to the paper in select regions.

The present disclosure proposes to increase the speed of such a printer by using a tandem printer architecture, wherein a single donor roll would be used for each color separation. Advantages of such an archit...