| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube pump capable of preventing dot missing even when cleaning is selectively performed for part of a plurality of nozzles. SOLUTION: A plurality of tubes are stored in a housing of a tube pump, each tube is pressed by a pressing member, and a negative pressure is generated in the tube by moving the pressing member while pressing the tube. At least one strong-suction tube among the plurality of tubes is pressed by the pressing member so that the whole tube cross-section is closed, and weak-suction tubes except the strong-suction tube are pressed by the pressing member so that an unclosed part remains in the tube cross-section. Using such a tube pump, only a little liquid is sucked from nozzles which are not cleaning objects under a negative pressure by the weak-suction tubes while part of nozzles is selectively cleaned under the negative pressure of the strong-suction tube, thereby preventing dot missing. COPYRIGHT: (C)2011,JPO&INPIT |
