Hot melt ink projection transparency

Details Hot melt ink projection transparency Hot melt ink projection transparency

1988-08-10

1989-10-10

Schwartz, Pamela R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

3461351, 428195, 428207, 4284111, 428480, 428484, 428913, B41M 500

Patent

active

048731340

ABSTRACT:
In the particular embodiments of the invention described in the specification, a projection transparency includes a transparent substrate and an ink pattern disposed on one surface of the transparent sheet in the form of three-dimensional ink spots having curved surfaces with a radius of curvature of at least 3 mils and an angle of contact with the substrate of no more than about 25.degree.. The transparency is prepared by applying ink drops to the substrate and maintaining the ink at a temperature above its melting point for a selected time such as 0.5 to 10 seconds. Thereafter, the ink is cooled rapidly to reduce crystallization and frosting and thereby reduce light transmission losses in the ink to less than 50%.

REFERENCES:
patent: 4528242 (1985-07-01), Burwasser
patent: 4547405 (1985-10-01), Bedell et al.
patent: 4555437 (1985-11-01), Tanck
patent: 4575465 (1986-03-01), Viola
patent: 4578285 (1986-03-01), Viola
patent: 4592954 (1986-07-01), Malhotra
patent: 4745420 (1988-05-01), Gerstenmaier

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