| 摘要 |
PROBLEM TO BE SOLVED: To provide a printing unit capable of easily knowing the residual amt. of ink by a simple structure. SOLUTION: In a printing unit 3 equipped with a printing head part 7 having ink nozzles 11 injecting ink to printing paper P and an ink tank 5 housing ink, an ink residual amt. display window 9 is provided to the side surface of the printing head part 7 and graduations for confirming the residual amt. of ink are applied to the ink residual amt. display window 9. |
