| 摘要 |
PURPOSE:To obtain a high performance liquid jet recording apparatus wherein the composition of the liquid in a liquid flow passage is kept constant even during a stop period and emission inferiority or the lowering in an emission speed is not generated, by a method wherein the liquid flow passage and a recording liquid supply passage are communicated by the communication port in the vicinity of an orifice and a wall having a notch is provided in the liquid flow passage so as to surround the communication port. CONSTITUTION:During recording, emission pressure is applied to the recording liquid in a liquid flow passage 1 by the action of an emission pressure generating part 8 and the recording liquid is emitted to perform recording continuously. When this recording becomes a stop state, the operation of a pump 6 is started and the recording liquid is recirculated in the order of recording liquid storage part 7 pump 6 recording liquid passage 5 liquid flow passage 1 liquid chamber 3 supply pipe 4 recording liquid storage part 7. At this time, since a wall 9 is present so as to surround a communication port 5a, energy is not almost escaped to the recording liquid passage 5 being a sub-flow passage at the time of emission and good printing can be performed. Further, since the quantity of the recording liquid of the whole of a recording head containing the liquid passage and the recording liquid storage part is extremely much as compared with the liquid flow passage, the lowering in the moisture ratio of the recording liquid is slight in a negligible degree even after the long-term stop of printing. |
