Treatment of hot melt ink images

Details Treatment of hot melt ink images Treatment of hot melt ink images

1989-10-02

1991-06-11

Lawrence, Evan

Coating processes

Optical element produced

Transparent base

427256, 427271, B05D 300, B05D 302, B05D 506

Patent

active

050231111

ABSTRACT:
In the embodiment described in the specification, a hot melt ink image on a substrate is treated in a continuous manner by moving it along a platen having a heating zone to melt drops of hot melt ink and cause them to spread on the substrate and decrease the angle of contact of the drops with the surface of the substrate. The platen has a flat central portion and curved portions at each end with curvatures sufficient to prevent formation of cockle. At the output end of the heating zone, the substrate is moved continuously into a quenching zone where a cooling platen cools the substrate by thermal contact at a rapid rate to prevent crystallization or frosting of the hot melt ink image. After the quenching zone, the substrate is moved along a surface having a reverse curvature with respect to the curved portions of the heating platen to eliminate residual curvature of the substrate resulting from the curved portions of the heating platen.

REFERENCES:
patent: 4751528 (1988-06-01), Spehrley, Jr. et al.
patent: 4801473 (1989-01-01), Creagh et al.
patent: 4853706 (1989-08-01), Van Brimer
patent: 4889761 (1989-12-01), Titterington et al.

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