| 摘要 |
PURPOSE:To eliminate clogging of a head nozzle by discharging an ink in a head on a preset condition and further a washing liquid introduced. CONSTITUTION:When printing, a head 1 and a suction cap 11 are kept open. A changeover valve 4 is made to communicate with an ink conduit 3 and a conduit 5 to an ink tank 6 to perform a printing on a recordong paper. When printing is not done, the suction cap 11 gets tight on a nozzle end face 2 of the head 1 and the changeover valve 4 is switched to communicate with an ink conduit 3 and a conduit 7 to a washing liquid vessel 8 and a suction pump 13 is operated. The pressure within the suction cap 11 is rendered negative via a conduit 12 to suck out the ink in the head 1, while a washing liquid in the washing liquid vessel 8 introduced into the head 1 from the conduits 7 and 3. After the head 1 is filled with the washing liquid, air is sucked in at an opening of the washing liquid vessel 8 and the washing liquid is also discharged out of the conduit 3 and the head 1 to be discharded into a waste liquid tank 15. |
