| 摘要 |
PURPOSE:To prevent generation of trailing or fog in an image, by forming a recording head so that a heat generating body may generate heat corresponding to an image signal and the ink in a housing is supplied to an ink sump through an ink passing hole and reduced in its viscosity to be transferred to a medium to be recorded. CONSTITUTION:An insulating substrate 4 and a heat generating body 5 comprising ruthenium oxide (RuO2) are provided to a part of a housing 2. At first, when a voltage pulse is applied to the heat generating body 5 through an electrode 7, the semisolid ink 3 in vicinity of the heat generating body 5 is heated. Said ink has a high viscosity at ambient temp. but when heated, it passes through ink passing holes 6 because its viscosity is reduced, and it spreads in the ink sump 9 and radiates heat at this time to again return to the semisolid state. Next, when voltage is applied to the heat generating body 5 corresponding to an image signal, said heat generating body 5 selectively generates heat and the semisolid ink 3 is lowered in its viscosity by said heat to be released from the ink sump 9 and transferred to recording paper 10. Therefore, trailing or fog is hard to generate in the transferred image and a sharp image can be recorded. |
