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US 4,284,005 AGranted
Apparatus for the metered feeding of ink to a ductor roll of an offset printing device
AssigneeDevelop Dr. Eisbein GmbH & Co.
InventorsReinhold Weigele, Wolfgang Pfeil, Horst Purr
Life of this patent
Estimating the term…
Abstract
An apparatus for a metered feeding of ink to a ductor roll of an offset printing device. The ductor roll is adapted to be dipped into an ink pool which is connected to a device for supplying metered amounts of ink. The device for supplying the metered amounts of ink is controlled by an installation for monitoring a level of ink in the ink pool. The monitoring installation includes a distance sensor which is constructed as a capacitive proximity switch.
Claims11
An apparatus for metered feeding of ink to a revolvable ductor roll adapted to be dipped in an ink pool comprising:
- pump means for supplying a metered amount of ink to said ink pool;
- capacitive proximity sensor means for monitoring a level of ink in the ink pool and for providing a control signal to the pump means;
- control means including timer means for delaying a delivery of said control signal from said capacitive proximity sensor means to said pump means until a predetermined time after the ductor roll begins a revolution;
- wherein the capactive proximity sensor means is associated with an area of said ink bath where an ink bead forms upon revolution of the ductor roll, whereby a predetermined amount of ink is metered into said ink pool upon receipt of said control signal by said pump means.
1 more element
Dependencies are inferred from the claim text.