| 摘要 |
A printhead assembly, an image forming apparatus and an ink supply unit supply colour inks to a plurality of printheads which are arranged in a direction transverse to an advancing direction of a printing medium. The ink supply unit includes a first channel member (220) to receive different colour inks, a second channel member (230) engaged with the first channel member to divide each of the supplied colour inks to a plurality of sets of first unit channels corresponding in number to the plurality of printheads, and a third channel member (240) engaged with the second channel member. A plurality of second unit channels of the third channel member supplies each of the colour inks being supplied from the first unit channels to each of the printheads. A support plate (210) is used to support the first, second, and third channel members in a stack structure.
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