| 摘要 |
PROBLEM TO BE SOLVED: To provide a case unit, by which a user can surely know the ink color of a printing drum kept in a drum case without opening or closing the drum case. SOLUTION: This case unit 1 for a printing drum has a drum case 2 for keeping the printing drum 21 therein, an ink color detecting means 13 for detecting the ink color of the printing drum kept within the drum case 2 and a displaying means 4, the displaying surface 4A of which is arranged so as to face to the outside of the drum case 2 and which displays at least the ink color detected by the ink color detecting means 13. |
