| 摘要 |
PURPOSE:To supply oil uniformly and economically by providing an oil tank which has such a chemical valve that when a prescribed voltage is applied, holes expand and oil leaks out. CONSTITUTION:The oil tank 15 which has the chemical valve 40 is provided so that the chemical valve 40 contacts with a fixing roller 11. The film holes 42 of a thin film 41 which contract when the voltage is applied have enough diameters not to make the oil leak. Then when the voltage is applied to an electrode 45 to contract the thin film 41, the film holes 42 increase in diameter because the periphery of the thin film 41 is fixed by a fixing ring 43 when the voltage is applied and the oil is supplied from the expanded film holes 42. Consequently, the supply of the oil can be controlled by an oil coating part itself and the voltage applied to the chemical valve 40 is controlled to easily adjust the amount of the oil applied on the fixing roller 11. |
