Evacuation system for inking chamber

Details Evacuation system for inking chamber Evacuation system for inking chamber

1991-08-02

1992-11-24

Burr, Edgar S.

Printing

Inkers

Fountains

101350, 101210, B41F 3106

Patent

active

051653427

ABSTRACT:
An apparatus for evacuating ink from the inking trough of a flexographic printing machine uses an air ejector nozzle in the ink drain line to draw ink from the trough. The apparatus includes an air-operated control system in which air valves control an air-bladder pinch valve in the ink drain line and an oil-bladder pinch valve in the air ejector line. An air pressure regulator maintains a pressure charge on an accumulator associated with the oil-bladder pinch valve, in order to provide a gradual increase of air flow to the ejector nozzle to prevent sudden vacuum surge that might over-flex the doctor blades.

REFERENCES:
patent: 3800702 (1974-04-01), Roberts
patent: 4304611 (1981-12-01), Ellis
patent: 4930416 (1990-06-01), Kawabata et al.

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