Arrangement for metering ink on the fountain roller of a printin

Printing – Inkers – Fountains

Patent

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Details

101DIG26, B41F 3104, B41F 3106

Patent

active

043287484

ABSTRACT:
An ink fountain of the type having a plurality of metering blades arranged closely side-by-side and having a metering edge which is presented to the fountain roller. The metering blades are divided into small groups of equal size with each group being supported upon a moveable carrier. A set of stops are interposed between each blade and its carrier to define (a) an extended reference position in which the pesented edges of the blades on the carrier are in alignment and (b) a relatively retracted feeding position in which the blade is retracted a predetermined amount to define a gap for feeding of ink in the zonal position controlled by the blade. Each blade has a spring for biasing it forceably into its extended position; an individual power actuator is interposed between each blade and its carrier for retraction of the blade into its feeding position. A control device is provided for activating the actuators for periods of time which correspond to the ink requirements of the zonal position including provision for ensuring that at all times at least one of the metering blades in each group occupies its extended reference position. A biasing spring interposed between the frame of the fountain and each carrier urges the carrier in the direction of the fountain roller so that the extended blade thereon acts as a local gauging device for the retracted ones of of the blades in the group.

REFERENCES:
patent: 1275348 (1918-08-01), Wood
patent: 3110254 (1963-11-01), Davis
patent: 3968746 (1979-07-01), Gaillochet
patent: 4193345 (1980-03-01), Schoneberger et al.

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