Thermal transfer printing

Details Thermal transfer printing Thermal transfer printing

2006-09-05

2006-09-05

Feggins, K. (Department: 2861)

Incremental printing of symbolic information

Thermal marking apparatus or processes

With transfer medium or driving means therefor

C347S213000

Reexamination Certificate

active

07102660

ABSTRACT:
An article for receiving an image by thermal transfer printing includes an image-receiving surface of plastics material coated with a layer of dye-receptive material capable of accepting an image by means of a dye thermal transfer process, wherein the glass transition temperature (Tg) of the dye receptive material is at least 50° C. lower than the softening point of the plastics material of the image-receiving surface. By having a difference between the softening point of the plastics material article surface and the Tg of the material coated thereon of at least 50° C. it is possible to achieve printing in a single step transfer process of high density images without distortion of the plastics material. The invention can be used with three-dimensional articles possibly having compound curves, including casings for mobile telephones made of polymers such as polycarbonate.

REFERENCES:
patent: 4568949 (1986-02-01), Muranaka
patent: 4664672 (1987-05-01), Krajec et al.
patent: 5438348 (1995-08-01), Imai et al.
patent: 5841462 (1998-11-01), Matsuo et al.
patent: 00/74946 (2000-12-01), None

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