Methods and apparatus for ink capping ink jet printer nozzles

Details Methods and apparatus for ink capping ink jet printer nozzles Methods and apparatus for ink capping ink jet printer nozzles

B - Operations, Transporting

41

J

B41J 2/165 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2296326

Methods and apparatus are provided for preventing clogging in impulse ink jet printers. The printer comprises at least one nozzle (12) having an orifice for ejecting ink droplets (14c); a chamber (15) for containing ink (14a) which forms a barrier of high viscosity ink at the orifice when the nozzle is in a quiescent state; and a control means (16) for generating a sequence of firing signals and sub-firing signals. The sub-firing signals have an amplitude which is effective to remove the barrier. An ink composition with fast-drying properties is disclosed.

L'invention porte sur un procédé et un appareil empêchant le colmatage des imprimantes à jets d'encre pulsés. L'imprimante comprend: au moins une buse (12) munie d'un orifice d'éjection de gouttes d'encre (14c); une chambre (15) contenant une encre (14a) formant une barrière de viscosité élevée au niveau de l'orifice; et des moyens de commande (16) produisant une suite de signaux de déclenchement et de sous-déclenchement, ces derniers présentant une amplitude suffisante pour détruire la barrière. L'invention porte également sur une composition d'encre à séchage rapide.

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