Sensor system for sensing an ink flow in ink jet printing...

Details Sensor system for sensing an ink flow in ink jet printing... Sensor system for sensing an ink flow in ink jet printing...

B - Operations, Transporting

41

J

B41J 2/165 (2006.01) B41J 2/175 (2006.01) B41J 2/195 (2006.01) B41J 29/393 (2006.01)

Patent

CA 2220079

An improved sensor system for a printer (10) having a print carriage (16) comprising an ink source (48), a print head (28), and a coupler for coupling the ink source to the print head (28), the coupler including a tube (32) for carrying the ink and sensors (34, 46) for detecting voids in the ink (82) carried by the tubes (32) and positioned in close proximity to the ink source (48) and the print head (28). A controller (12) is coupled to the sensors (34, 46) and responsive to signals output therefrom to stop the print carriage (16) when voids are simultaneously detected by the sensors (34, 46).

Ce système perfectionné de capteurs est destiné à une imprimante (10), laquelle comporte un chariot (16) d'impression comprenant une source (48) d'encre, une tête (28) d'impression, ainsi qu'un dispositif d'accouplement servant à relier la source d'encre à la tête (28) d'impression, ce dispositif présentant un tube (32) servant au transport de l'encre, ainsi que des capteurs (34, 46) destinés à détecter des défauts d'encrage dans l'encre (82) acheminée par les tubes (32), lesquels capteurs sont placés à proximité de la source (48) d'encre et de la tête (28) d'impression. On a couplé un module (12) de commande aux capteurs (34, 46), lequel est sensible à des signaux de sortie provenant de ceux-ci, afin d'arrêter le chariot (16) d'impression lorsque des défauts d'encrage sont détectés simultanément par les capteurs (34, 46).

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