| 摘要 |
PROBLEM TO BE SOLVED: To prevent ink suction into a jet part from being interrupted caused by a pressure decrease due to filter resistance, and to reduce cost for a filter.SOLUTION: A filter 14 prevents the clogging of a jet part or a nozzle 28 is arranged on a flow path or an ink injection path 22 from an ink injection port 12 through which ink supplied from an ink supply source passes to a chamber 16 for storing the ink by preventing particulates. The ink is stored in the chamber 16 between the filter 14 and the nozzle 28, so even if a pressure decrease before and after the filter 14 is generated, the nozzle 28 can normally suck ink. The filter 14 may be compact and inexpensive so that it can be mounted to the ink injection port 12. A vent path 26 is formed with a vent hole 18 in a top part of the chamber 16, so an internal pressure of the chamber 16 is automatically adjusted. It is preferable that a filter for preventing foreign matters is arranged in the vent hole 18. |
