Cleaning fluid apparatus and method for continuous printing...

B - Operations – Transporting – 41 – J

Patent

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B41J 2/165 (2006.01)

Patent

CA 2218984

A fluid (liquid or water) wash (46) is used to clean the front surface of an ink jet printer cartridge (17). In addition, a nozzle plate (24) that overlies the nozzle shields the nozzle array (23) from the splatter of ink (32). In ink jet printers, ink droplets are propelled from an array of orifices in a nozzle plate in the printer head. During the ink droplet ejection, ink is sprayed or deposited around the orifices. The ink droplets are deposited on a paper web (14) adjacent the nozzle and mist from the droplets drifts back to coat the face of the nozzle plate. Some ink seeps behind the nozzle plate (24) onto the array of nozzle orifices (23). The ink coating attracts particles that tend to clog the nozzle orifices. The ink coating is washed away by fluid streams (46) that flow over the nozzle surface and in some embodiments flow over the nozzle orifices themselves. The fluid (46) may be water, ink or other liquid that is channelled across the nozzle surface, or the fluid may be an air stream that blows across the nozzle surface.

On utilise un fluide (de l'eau ou un autre liquide) (46) pour laver la surface avant d'une cartouche d'impression (17) par jet d'encre. Une plaque (24) à buses recouvre le système de buses (23) et le protège des éclaboussures d'encre (32). Dans les imprimantes par jet d'encre, les gouttelettes d'encre sont propulsées par une pluralité d'orifices dans la plaque à buses de la tête d'impression. Durant l'éjection des gouttelettes d'encre, l'encre pulvérisée se dépose autour des orifices. Les gouttelettes d'encre sont déposées sur une bande de papier (14) jouxtant la buse et le brouillard des gouttelettes dérive en arrière pour se déposer sur la face de la plaque à buses. Une partie de l'encre s'infiltre derrière la plaque (24) à buses sur le système d'orifices (23) des buses. Le revêtement d'encre attire des particules ayant tendance à obstruer les orifices des buses. Le revêtement d'encre est lavé par les flux (46) de fluide qui balaient la surface à buses et, dans certaines formes d'exécution, les orifices des buses. Le fluide (46) peut être de l'eau, de l'encre ou un autre liquide dont le flux est dirigé le long de la surface à buses. Egalement, le fluide peut être de l'air comprimé soufflé le long de la surface à buses.

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