A recess is formed in a surface confronting an actuator unit of an ink supply inlet forming substrate. When a flow path unit and the actuator unit are bonded together using a fusible film, thermally expanded air is released into the recess to thereby reduce pressure. Further, by arranging the recess at a position confronting a pressure generating chamber, an air layer formed by the recess is allowed to function as a vibration shielding member.
An ink-jet head includes a plurality of ink ejection nozzles, a plurality of ink pressure chambers provided corresponding to the respective ink ejection nozzles and respectively communicated with the corresponding ink ejection nozzles, a common ink chamber for supplying an ink to the respective of the ink pressure chambers, a plurality of ink supply orifices provided corresponding to the respective ink pressure chambers and communicating the respective ink pressure chambers and the common ink chamber, and electrostatic actuators for varying volume of respective of the ink pressure chambers by an electrostatic force for ejection of ink droplets from the corresponding ink ejection nozzles. A plurality of the ink pressure chambers is arranged in a plane and the common ink chamber stacked on the plurality of ink pressure chambers for reducing the length.
Acoustic filters for use in an ink jet print head are disclosed. The ink jet print head defines a plurality of operating plates held together in a superimposed relationship forming an ink jet print head defining a plurality of ink manifolds, ink inlets, ink drop-forming orifices and a plurality of acoustic filters. The acoustic filters are a plurality of compliant areas connected by an acoustic filter constriction aperture and a plurality of separate compliant areas all connected to ink manifolds for suppressing unwanted frequencies during print modes.
A printhead module for a printhead assembly is provided having at least two printhead integrated circuits, each of which has nozzles formed therein for delivering printing fluid onto the surface of print media, a support member supporting the printhead integrated circuits and at least two fluid distribution members individually mounting a respective one of the at least two printhead integrated circuits to the support member. The support member has at least one longitudinally extending channel for carrying the printing fluid for the printhead integrated circuits and includes a plurality of apertures extending from the at least one channel through a wall of the support member. Each of the fluid distribution members is formed as a laminated stack of layers for directing the printing fluid from the apertures of the support member to the nozzles of the associated printhead integrated circuit.
A flow path unit is provided with an individual ink flow path including a pressure chamber opposite to a sub-manifold 5a and an individual ink flow path including a pressure chamber not opposite to the sub-manifold. The sub-manifold is provided with a beam connecting an upper surface and a lower surface of the sub-manifold.
