Patent attributes
An ink-jet printing head including: a head unit which includes a plurality of nozzles from which inks of different kinds are ejected onto a recording medium and a plurality of ink supply ports from which the inks of different kinds are respectively supplied and which are open in a surface of the head unit, the plurality of ink supply ports being spaced apart form each other; and a joint member having a plurality of channels which are open in a surface of the joint member and which are spaced apart from each other, the joint member being connected at the surface thereof to the surface of the head unit, such that the plurality of channels communicate with the plurality of ink supply ports, respectively, and wherein at least one recess is formed on at least one of the surface of the head unit and the surface of the joint member such that each of the at least one recess is located at least one of between adjacent ones of the plurality of channels and between adjacent ones of the plurality of ink supply ports.
