| 摘要 |
PROBLEM TO BE SOLVED: To provide a circulating type ink supply system which can properly hold a pressure applied on an ink near an opening of a nozzle. SOLUTION: The circulating type ink supply system includes an upstream ink tank, an upstream ink flow channel connected at one end thereof to the upstream ink tank, a nozzle branch part connected to the other end of the upstream ink flow channel and being in communication with the nozzle for discharging the ink, a downstream ink flow channel connected at one end thereof to the nozzle branch part, a downstream ink tank which stores the ink flown out from the upstream ink tank connected to the other end of the downstream ink flow channel, and a return flow channel which returns the ink of the downstream ink tank to the upstream ink tank. An energy per unit volume determined by a sum value of a static pressure and a potential energy of the ink in the upstream ink tank when the circulation of the ink is stopped is not larger than an energy per unit volume of the ink at an atmospheric pressure at a level of the nozzle. COPYRIGHT: (C)2010,JPO&INPIT |
