| 摘要 |
PURPOSE:To simplify a constitution and thereby make possible the acquisition of a stable image even if the drive frequency of a thermal ink jet is increased by arranging an electricity/mechanical pressure converter in an ink liquid chamber and allowing the converter to be driven while it is synchronized with the drive frequency of a thermal ink jet head. CONSTITUTION:The electricity/mechanical pressure converter of a thermal ink jet head consists of various types of piezoelctric element 4. Said converter is installed either on the wall surface of the first ink chamber 8-1, on the side of a nozzle hole, which is partitioned with the protruding wall of an ink liquid chamber 8 along an ink circulation path or on the end of the ink liquid chamber 8 opposed to the nozzle hole through an ink flow path. A pressure wave is generated by energizing the converter and then is conducted to the entirely useful ink flow path almost uniformly. An electricity/heat converter being used is a thermal resistor 2 and generates heat due to energization. It is formed as a film on a substrate 1. The electricity/mechanical pressure converter is driven, while it is synchronized to the drive frequency of the thermal ink jet head. Subsequently, the time required for replenishing ink to the nozzle hole can be shortened and stable printing at high speed is ensured. |
