| 摘要 |
PURPOSE:To facilitate fitting an ink supply source to an ink-supplying system and prevent leakage of an ink from occurring at the time of fitting or replacing the ink supply source, by a method wherein a valve part which is opened when fitting an ink head to the ink supply source and is closed when separating the ink head from the ink supply source is provided in an ink-supplying passage in the ink head. CONSTITUTION:With a bank casing 1 fitted to a front casing 4, the tip of a piston 15 pushes to open a valve 13, and is displaced until it comes into contact with a valve stopper 14, whereby an ink inlet port 4A is opened. With further insertion, the piston 15 is retracted against a return spring 17, thereby opening an ink-supplying hole of a cover 3, so that an ink 19 in a bag 2 flows through an ink inlet passage 18 into an ink pool part 20 in the front casing 4, and is ejected through an ink-ejecting port. When the tip of the piston 15 is separated from the valve 13, a negative pressure is developed in the interior of a spongy elastic member 9, and the ink inlet port 4A is closed by the valve 13. Simultaneously, the piston 15 is pushed by the return spring 17, thereby closing the ink- supplying hole of the cover 3. Accordingly, leakage of the ink is prevented from occurring at the time of fitting or replacing the back casing 1. |
