| 摘要 |
An ink jet recorder includes a sub ink tank and a recording head which includes a manifold. The tank and the manifold are connected to an upstream supply tube and a downstream supply tube, respectively. The supply tubes can be connected by a first joint. The manifold and an upstream return tube can be connected by a second joint. The joints are fitted with filters, respectively, for removing foreign substances etc. from ink. The filters are so positioned that ink can flow upward through them. This makes it easy for the air in the ink flowing through the filters to pass buoyantly through them. Because no air stays at the filters, it is possible to increase their effective areas, and therefore secure the quantity of ink flow necessary for printing.
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