g an ink reservoir according to the first embodiment, in which FIG. 12A is a sectional front view seen from the front, FIG. 12B is a sectional view taken along the line I-I of FIG. 12A, and FIG. 12C is a sectional view taken along the line II-II of FIG. 12A; [0045]FIGS. 13A, 13B, and 13C are views for describing how ink flows in the ink reservoir, in which FIG. 13A is a sectional front view seen f