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(11) | EP 0 897 804 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Liquid ink printhead |
| (57) A liquid ink printer including a liquid ink printhead for ejecting liquid ink drops
on a recording medium to form an image thereon having reduced misting defects. A printhead
includes a selection circuit (100), coupled to a plurality of transducers (92), for
causing non-adjacent nozzles of an array of nozzles (50) to eject liquid ink drops
substantially simultaneously. In addition, a method of reducing misting defects during
printing of a line of an image by a liquid ink printhead having a plurality of transducers
(92) being activatable to eject ink from an array of N nozzles (50) includes the steps
of ejecting a first ink drop from a first nozzle and a second ink drop from a second
nozzle substantially simultaneously to form a first portion of the line of the image,
the first nozzle and the second nozzle being non-adjacent, and ejecting a third ink
drop from a third nozzle of the array of nozzles to form a second portion of the line
of the image, the third nozzle being located between the first nozzle and the second
nozzle. Multiple ripples of the printhead nozzles are made to complete a single line
of the image. |