| 摘要 |
A liquid-jet recording apparatus includes a liquid-jet recording head unit to jet ink droplets toward a recording medium for printing and including an opening area through which the ink droplets fly out from the liquid-jet recording head unit, and a conveyance unit to convey the recording medium to a fore side of the opening area. The liquid-jet recording head unit includes a multi-nozzle inkjet head, a separation unit, a gas-flow application unit, and a gutter unit. The multi-nozzle inkjet head includes multiple inkjet nozzles, pressurizes ink, and emits a plurality of continuous streams of an ink. The opening area has a slit shape extending along a direction in which the multiple inkjet nozzles are arrayed. An air flow generated in the opening area has a velocity vector directed inward from the opening area. |
| 主权项 |
1. A liquid-jet recording apparatus, comprising:
a liquid-jet recording head unit to jet ink droplets toward a recording medium for printing, the liquid-jet recording head unit comprising an opening area through which the ink droplets fly out from the liquid-jet recording head unit; and a conveyance unit to convey the recording medium to a fore side of the opening area of the liquid-jet recording head unit, the liquid-jet recording head unit, comprising:
a multi-nozzle inkjet head comprising multiple inkjet nozzles, the multi-nozzle inkjet head pressurizing ink and emitting a plurality of continuous streams of an ink;a separation unit that stimulates surface of the continuous stream of ink and causes surface waves on the continuous stream of ink so that the continuous stream of ink breaks up into streams of flying ink droplets;a gas-flow application unit to apply a gas flow to the flying ink droplets from a substantially-vertical direction relative to a flying direction of the flying ink droplets; anda gutter unit to catch as non-print droplets first ink droplets of the flying ink droplets having a flying path deflected by the gas flow, wherein second ink droplets of the flying ink droplets having a flying path not substantially deflected by the gas flow hit the recording medium as print droplets without being caught by the gutter unit, the opening area through which the print droplets fly out from the liquid-jet recording head unit has a slit shape extending along a nozzle array arrangement direction in which the multiple inkjet nozzles are arrayed, the liquid-jet recording head unit is configured with at least one nozzle at each end of the nozzle array being a dummy nozzle that emits a continuous stream that is broken up by the separation unit into flying ink droplets that are non-print droplets, are deflected by the gas flow and are collected in the gutter unit, while the remaining nozzles emit respective continuous streams of print droplets and are assisted by the dummy nozzles such that the continuous streams of print droplets emitted by the remaining nozzle for printing have a uniform speed, and the continuous stream emitted by the dummy nozzle reduces air resistance to which the continuous streams emitted by the remaining nozzles are subjected, and an air flow generated in the opening area has a velocity vector directed inward from the opening area. |
