| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable ink jet recording apparatus by preventing trouble such as the fixing of a sub-tank film or the clogging of a passage even when a circulating type ink jet recording apparatus is allowed to stand over a long period of time. SOLUTION: A flexible supply tube 51 is connected to the ink supply port 7 on the side of a cartridge 41 and a passage valve 52 being a valve means is connected to the other end of the supply tube 51. The passage valve 52 is further connected to an ink cartridge 41 through a tube 54 and a tubular needle 53. An air pump 61 serving as an ink supply means is branched into four systems through a pressure regulator 62 to be connected to the ink cartridge 41 from changeover valves 63 through air pipes 64. |
