Metering roller for a lithographic printing press

Details Metering roller for a lithographic printing press Metering roller for a lithographic printing press

1992-07-10

1994-07-19

Fisher, J. Reed

Printing

Planographic

Dampeners

1014501, B41F 726, B41F 732

Patent

active

053298500

ABSTRACT:
A method for maintaining, without using alcohol, a uniform film of dampening fluid on a lithographic printing press dampening roller. Said roller comprises a resilient surface with grooves helically formed about the roller surface. Said roller is positioned in a pressure indented relation to a smoothly finished transfer roller having a hydrophilic surface, creating an area of differential pressure along said grooves at the point of contact, or nip, between the rollers. Upon rotation of the rollers, excess water is transferred to the low pressure regions near the grooves of the nip and then to the end of the roller where it is returned to the dampening fluid pan.

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patent: 3613575 (1971-10-01), Kantor
patent: 3986452 (1976-10-01), Dahlgren
patent: 4411193 (1983-10-01), Hess
patent: 5016530 (1991-05-01), Palmatier

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