Printing press with means for transferring the printing ink...

Details Printing press with means for transferring the printing ink... Printing press with means for transferring the printing ink...

B - Operations, Transporting

41

M

101/42

B41M 1/42 (2006.01) B41F 9/00 (2006.01)

Patent

CA 1087916

A printing press with means for transferring the printing ink electrostatically onto a dielectric web. ABSTRACT OF THE DISCLOSURE According to the present invention an electrostatic charge is in- duced on the surface of the impression cylinder of a printing press by means of an inductor device. The inductor device includes a row of pointed elec- trodes. Cover elements are fitted to the inductor device and can be displaced along the row of electrodes, thus insulating a certain part of the electrode array. As a result, only a given, restricted area of the impression cylinder surface is charged. In addition, an insulating shield is fitted at each end of the impression cylinder to prevent charge leaking away from the impression cylinder surface to the earthed shaft of the impression cylinder. These no- vel measures enable the charge distribution in the impression zone to be precisely controlled. This is of particular advantage when printing onto webs whose width is less than that of the impression or printing cylinder.

276981

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