Variable frequency ink jet printer

Details Variable frequency ink jet printer Variable frequency ink jet printer

B - Operations, Transporting

41

J

B41J 2/09 (2006.01) B41J 2/07 (2006.01) B41J 2/115 (2006.01)

Patent

CA 2115073

2115073 9324329 PCTABS00028 A method and apparatus are disclosed in which deflection and print speed are controlled by varying the nozzle drive frequency to increase or decrease drop velocity thereby to control drop deflection. The variation is done in a manner to maintain the ratio .lambda./d and drop size substantially constant. By altering the drop velocity the transit time of the drops through the high voltage deflection field is changed, permitting increased or decreased deflection. The system includes a pressure controller (20), a velocity sensor (38), a variable frequency nozzle drive and a processor. Calculations and operations are performed by the processor, based on the size of an operator selected image.

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