Printing – Planographic – Dampeners
Patent
1989-07-20
1991-01-01
Fisher, J. Reed
Printing
Planographic
Dampeners
101350, B41F 726, B41F 740
Patent
active
049810774
ABSTRACT:
A dampener for a lithographic press comprises a form roller, a metering roller, a reservoir of dampening solution lying above and between the form and metering rollers, and means for supplying solution to the reservoir. The amount of solution applied to the form roller is controlled by adjusting the pressure between the form and metering rollers, without appreciably affecting the pressure between the form roller and the plate cylinder. Excess moisture retained on the form roller and excess solution which collects between the plate cylinder and the form roller is continuously returned directly to the reservoir. The metering roller and the plate cylinder are driven by the press gear drive system, and the form roller is driven from frictional contact with the plate cylinder and the metering roller, to aid in retrofitting the dampener to existing presses. The dampener mechanism can also be used alternatively to supply water-based coating liquids to allow use of the press for a coating operation.
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Varn Products Co., Inc.; May 1980, "Offer Automatic Dampening System for Small Press Sizes".
Print Action; "Varn Intros Kompac Auto Dampening System"; Page eleven; Aug. 1980; Printaction.
John MacPhee; "Trends in Litho Dampening System Show Vast Improvements in Designs"; Apr. 1981; Graphics Arts Monthly P.G. 3.
Varn Products Co., Inc., "Kompac II Automatic Dampening System"; Model Specifications, 1983, Varn Products Co., Oakland, N.J.
Fisher J. Reed
Varn Products Company
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