| 摘要 |
An ink feeding apparatus including an ink tube enabling ink to flow between an ink tank and an image recording unit, and an ink feeding mechanism having a bellows pump interposed in the ink tube. The bellows pump includes a bellows body whose internal volume changes by expanding and contracting in a substantially vertical direction, and a connection port provided above the bellows body to connect the bellows body and the ink tube. An angle a formed upward by an upper surface inside a ridge fold portion of the bellows body with respect to a substantially horizontal direction and an angle b formed downward by an lower surface inside a ridge fold portion with respect to a substantially horizontal direction are related as 0°≦̸angle b<angle a<90°. Therefore, bubbles in the bellows pump are discharged swiftly and reliably.
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