Patent ID: 8267499

Claim:
A head cap, comprising: a cap having a substantially rectangular shape in plan view and comprising (a) a bottom plate portion and (b) a circular projecting portion which functions as a side wall, which projects from the bottom plate portion, and which comprises a distal end configured to contact a surrounding of a liquid-droplets ejecting area formed in a liquid-droplets ejecting surface of a liquid-droplets ejecting head, such that the liquid-droplets ejecting area is enclosed thereby; a recessed portion defined by at least an inner wall of the circular projecting portion and an upper surface of the bottom plate portion, the recessed portion configured to become a closed space defined by at least the liquid-droplets ejecting surface, the inner wall of the circular projecting portion, and the upper surface of the bottom plate portion, when the distal end of the projecting portion is brought into contact with the liquid-droplets ejecting surface; a holder configured to support the cap; a groove formed in at least one of a first surface of the bottom plate portion which is opposed to the holder and a second surface of the holder which is opposed to the bottom plate portion so as to partly constitute an air communicating channel that enables fluid communication between the closed space and a space external to the closed space; and a channel wall provided between the first surface and the second surface so as to enclose the groove as seen in a direction perpendicular to one of the first surface and the second surface by contacting with at least one of the first surface and the second surface, wherein the channel wall comprises a pair of wall bodies which extend in a longitudinal direction of the cap in one side end portion of the cap and which are formed on the bottom plate portion so as to be superposed on the circular projecting portion in plan view, the groove being interposed between the pair of wall bodies.