| 摘要 |
PURPOSE:To enhance heat generating efficiency and to extend the life of a product by applying voltage to liquid ink and generating Joule heat by a current flowing through conductive particles and ejecting or raising the liquid ink from an orifice by the volumetric expansion of the liquid ink or the pressure due to the generation of an air bubble. CONSTITUTION:When voltage is applied across electrodes 41, 42, a current selects a place low in resistance to flow into liquid ink containing conductive particles. Since the electrodes 41, 42 and the conductive particles as well as mutual conductive particles become a contact state in an extremely small area and the resistance of a solvent is high, the concn. of a current is generated in the contact parts and large Joule heat is generated per a unit area. A temp. rise is generated by this Joule heat and the temp. of the liquid ink exceeds the b.p. of the solvent to generate small air bubbles and some air bubbles gather to become a large air bubble 9'' and a current passage 8'' larger in the concn. of a current is formed and the growth of the air bubble is generated with increasing speed by the mutual action of the generation and formation of the air bubble and the temp. rise due to the concn. of a current and the liquid ink rises from the leading end of an orifice 1 to be ejected. |
