| 摘要 |
PURPOSE:To prevent the dot omission due to a continuity inferior current supply element by a method wherein a current is supplied from one of a pair of normal current supply elements adjacent on both sides of the continuity inferior current supply element to the other one to record the dot to be recorded by the continuity inferior current supply element. CONSTITUTION:In such a state that all of current supply elements 31, 32, 33 are in a normal continuity state, when a current 50 is supplied to said elements, said current 50 flows from said current supply elements to a common return electrode 3 and a dot image 40 is transferred to recording paper to be formed thereon. However, when the current supply element 32 is inferior to continuity, the dot due to the current supply element 32 is not recorded to generate a dot omission phenomenon. Thereupon, the current supply quantities of the respective current supply elements are measured in order to know whether a continuity inferior current supply element is present in a head and a current is allowed to flow from one of a pair of the normal current supply elements 31, 33 adjacent on both sides of the continuity inferior current supply element 32 to the other one to record a dot image 41. |
