| 摘要 |
<p>An ink supply device for supplying ink to a print head, comprising: a first meniscus forming member with pores formed in a communicating hole for use in supplying ink, a first ink chamber capable of containing ink under a negative pressure, a joint portion communicating with said communicating hole and simultaneously with said print head, and a hermetically sealed second ink chamber, wherein the following relation is satisfied: <MATH> where PR = negative pressure generated in said first ink chamber; PB = bubble point pressure of said first meniscus forming member; and PH = hydraulic head pressure of ink acting on the face on said first ink chamber side of said first meniscus forming member. <IMAGE></p> |
