Capillary unit for ink jet printer
AssigneeSiemens Elema AB
InventorsBertil Almgren, Terje Rye
Life of this patent
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Abstract
A capillary unit for an ink jet printer, having a nozzle for spraying a jet of ink onto a record carrier. The jet of ink breaks up into a series of droplets at a droplet formation point in front of the nozzle. A charging electrode, with which the ink droplets are selectively charged for subsequent electrical deflection, is arranged in the area of the droplet deflection point. The charging electrode is devised in the form of a plate, arranged perpendicular to the path of the jet, with a through hole for passage of the droplets. The charging electrode is further devised with at least one groove running from the hole to the outer edge of the electrode.
Claims16
An ink jet printer for spraying a jet of ink onto a record carrier arranged on a rotatable drum, comprising:
- a nozzle means adapted to receive a supply of ink for spraying a jet of said ink along a path onto said record carrier, said nozzle means being movable perpendicular to a direction of movement of said record carrier;
- electrode means for imparting an electrical charge to said jet of ink including a plate disposed perpendicular to the path of the jet of ink having a through hole for passage of the jet of ink and an outer edge, and having at least one groove running from the hole to the outer edge, and a nozzle holder, said plate attached to said nozzle holder, said nozzle holder adjustably supporting the nozzle means, said groove arranged for visual observation of a droplet formation point of said jet of ink for position adjustment of said nozzle means with respect to said plate.
A capillary unit for an ink jet printer for spraying a jet of ink onto a record carrier arranged on a rotatable drum, comprising:
- a nozzle means for spraying a jet of ink along a path onto a record carrier, said jet of ink separating into a series of droplets at a droplet formation point in front of said nozzle means, said nozzle means being movable perpendicular to a direction of movement of said record carrier;
- a nozzle holder adjustably supporting said nozzle means;
- and
- electrode means for selectively charging said ink droplets for subsequent electrical deflection, said electrode means comprising a plate arranged perpendicular to the path of said ink droplets, with an outer edge and a through hole for passage of the ink droplets, said plate having at least one groove extending from the through hole to the outer edge, and said plate being attached to said nozzle holder, said groove arranged for visual observation of said droplet formation point for position adjustment of said nozzle means with respect to said plate.
Dependencies are inferred from the claim text.