Ink drop velocity control system

Details Ink drop velocity control system Ink drop velocity control system

B - Operations, Transporting

41

J

101/96.0208

B41J 2/125 (2006.01) B41J 2/02 (2006.01)

Patent

CA 1238238

INK DROP VELOCITY CONTROL SYSTEM ABSTRACT OF THE DISCLOSURE A method and apparatus are disclosed for providing feedback control of the ink drop velocity in a drop marking system. The control system maintains essentially constant velocity of the ink drops as they pass through a deflection field which causes certain of the electrically conductive drops to be directed onto a substrate to be marked. The ink flow between two selected points is monitored by a control device to generate ink flow rate data and compared against a reference value. In the event that a flow rate devia- tion is sensed, appropriate action is taken to change the flow rate. Such action includes altering ink vis- cosity and/or ink pressure.

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