| 摘要 |
PROBLEM TO BE SOLVED: To achieve both improvement of a foreign substance capturing effect in a flow channel and decreasing of the amount of consumption of a liquid when the foreign substances on each filter are discharged. SOLUTION: The filters are respectively arranged on the upstream side and on the downstream side in an outward flow path toward a delivering opening from an opening of a joint 2a. In a head, a first return flow path (a flow path from a face brought into contact with a first chamber 21 in the filter 2f to the opening of a joint 2c) to the filter 2f on the upstream side, and a second return flow path B2 (a flow path from an upper face of the filter to the opening of a joint 2b) to the filter on the downstream side, are separately provided. In addition, in the head, an air vent flow path 26a for communicating a partial flow path corresponding between the upstream and downstream filters among the outward flow path with the second return flow path B2, is formed. COPYRIGHT: (C)2011,JPO&INPIT |
