Incremental printing of symbolic information – Ink jet – Controller
Patent
1997-09-25
2000-09-19
Barlow, John
Incremental printing of symbolic information
Ink jet
Controller
347 54, B41J 201
Patent
active
061201243
ABSTRACT:
An ink jet recording apparatus capable of ejecting ink droplets in which the volume is precisely and easily controlled. The gradient of the pixel to be printed, based on a digital gradient input signal, is provided for printing high resolution gradient images using a low drive voltage in this ink jet head. More specifically, the ink jet recording apparatus of the present invention will include a diaphragm formed at one part of a wall of each independent ejection chamber, with electrodes formed opposite each diaphragm and spaced therefrom at a predetermined gap distance. Ink droplets are selectively ejected from nozzle openings in the ejection chamber by applying a voltage to generate an electrostatic force which momentarily deforms the diaphragm. Moreover, plurality of independent electrodes oppose each diaphragm and a pulse voltage is applied to a predetermined number of electrodes according to a gradient signal to eject ink droplets of a volume determined by the gradient signal.
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Atobe Mitsuro
Koeda Hiroshi
Yotsuya Shinichi
Barlow John
Dickens C.
Janofsky Eric B.
Seiko Epson Corporation
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