Treatment of hot melt ink images

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

B - Operations, Transporting

41

J

117/112, 32/31,

B41J 2/01 (2006.01) B05C 9/14 (2006.01) B05D 3/02 (2006.01) B05D 5/00 (2006.01) B41M 3/00 (2006.01) B41M 7/00 (2006.01)

Patent

CA 2025184

In the embodiment described in the specification, a hot melt ink image on a substrate (11) is treated in a continuous manner by moving it along a platen (27) having a heating zone to melt drops (38) of hot melt ink and cause them to spread on the substrate. The platen has a flat central portion (34) and curved portions (33,35) at each end with curvatures suffi- cient to prevent formation of cockle. At the output end of the heating zone, the substrate (11) is moved continuously into a quenching zone (36) where a cool- ing platen (16) cools the substrate (11) by thermal contact at a rapid rate to prevent crystallization or frosting of the hot melt ink image. After the quench- ing zone, the substrate is moved along a surface hav- ing a reverse curvature with respect to the curved portions (33, 35) of the heating platen (27) to elim- inate residual curvature of the substrate resulting from the curved portions of the heating platen.

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