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A straight line flexographic printing method and machine having a plurality of in-line liquid application stations, at least one of which is an upstream ink image-printing stations for printing ink images on a succession of cardboard copy sheets, and at least one of which is a final downstream liqui

A straight line flexographic printing method and machine having a plurality of in-line liquid application stations, at least one of which is an upstream ink image-printing stations for printing ink images on a succession of cardboard copy sheets, and at least one of which is a final downstream liquid-application station which may be a coating application station for printing a protective, and/or aesthetic coating over selected portions of, or over the entire ink image-printed surface of each cardboard copy sheet. The present method and apparatus involves the placement of a forced hot air drying station between each of the liquid application stations to evaporate volatile solvent/diluent from the ink images applied at each inking or coating station before the application of additional ink images or coatings thereover at the next downstream liquid application station.

대표청구항 ▼

In a flexographic, straight line printing machine comprising a plurality of liquid application stations each comprising a printing cylinder, at least one of which is an upstream ink printing station for the printing of ink images containing a volatile solvent/diluent onto a succession of individual

In a flexographic, straight line printing machine comprising a plurality of liquid application stations each comprising a printing cylinder, at least one of which is an upstream ink printing station for the printing of ink images containing a volatile solvent/diluent onto a succession of individual cardboard copy sheets as such sheets are moved therethrough, and at least one of which is a downstream printing station , and means for continuously feeding said individual copy sheets, without bending, through said liquid application stations, the improvement which comprises an intermediate drying station comprising at least one forced hot air means positioned between each of said liquid application stations to apply a line of forced hot air across the direction of travel of said sheets as they move therepast to effect the evaporation of the solvent/diluent from the ink images printed on said cardboard copy sheets prior to the movement of the ink-imaged copy sheets into the next liquid application station, to effect the drying of said images prior to the application of the rink images or a coating thereover.