Method and apparatus for direct charging of the surface of...

Details Method and apparatus for direct charging of the surface of... Method and apparatus for direct charging of the surface of...

B - Operations, Transporting

44

B

101/14

B44B 5/00 (2006.01) B41F 9/00 (2006.01)

Patent

CA 1221268

ABSTRACT OF THE DISCLOSURE This invention relates to a method and associated apparatus for applying a charge directly to an impression roll which engages a gravure cylinder of an electrostatic assist gravure press, wherein the improvement comprises the steps of placing a plurality of spaced contacts capable of applying a charge to the impression roll in direct contact with the surface of the impression roll, arranging the spacing between the contacts and the width thereof so that predetermined groupings of the contacts correspond to approximately the various web widths to be used with the gravure press, and controlling the charge applied by the contacts to the surface of the impression roll to minimize the current leakage between the impression roll and the gravure cylinder in those areas of the impression roll where the impression roll directly engages the gravure cylinder without the interposition of a web therebetween.

435165

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