HOT MELT INK PROJECTION TRANSPARENCY

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 o...

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Bibliographische Detailangaben
Hauptverfasser:	SPEHRLEY, CHARLES, W., JR, FULTON, STEVEN, J, YOUNG, LAWRENCE, R
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY COLOUR PRINTING ELECTROGRAPHY HOLOGRAPHY LINING MACHINES PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	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 DEG . 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%.