| 摘要 |
PURPOSE:To control viscosity of ink always at a constant value by a method wherein voltage corresponding to output of a temperature sensor is applied between electrodes, and a decreased content of the viscosity of ink following increase of temperature is corrected. CONSTITUTION:When a pulse corresponding to a recording signal is applied to a piezoelectric element 5 bonded onto a passage board 3, ink in an ink passage 1 is pressured by deformation of the piezoelectric element 5, and ink is jetted out from a nozzle 2. In this jetting of ink, a temperature sensor 10 is provided near a head, a pair of electrodes 8, 9 are established at positions opposed to each other on a wall of the ink passage 1 and besides ink having electric viscosity effect is used for the ink. Voltage corresponding to output of a temperature sensor is applied between the electrodes 8, 9, and a decreased content of ink viscosity following increase of temperature is corrected to control the viscosity of ink. Further, as electroviscous ink, that obtained by dispersing, for instance, 80wt.% paraffin, 8wt.% surface active agent, 8wt.% L-type zeolite (material giving electroviscous effect), and 4wt.% oil soluble dye with a ball mill for 18h. is used. |
