| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to supply ink stably through the automatic operation of an opening part by providing a push-up member for forming a clearance between a valve for sealing the ink and an O ring and further, providing an ink supply path communicating with an ink head from an opening part for ink supply. SOLUTION: When an ink tank 10 is not mounted on a head holder 9, an opening part 30 for ink supply can be securely closed by bringing an O ring 31 into tight contact with a tank valve 13, so that it is possible to prevent ink from leaking or drying. In addition, when the ink tank 10 is mounted on the head holder 9, the tank valve 13 is pushed up by a valve pusher 14 to be automatically opened and thus it is possible to stably supply the ink into an ink supply path 12. Further, if a difference in the atmospheric pressure is generated inside and outside the ink tank 10 before the head holder 9 is mounted, the ink does not spew out as the tank valve 13 is forced into contact with the O ring 31 by an elastic member. |
