Abstract: 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.

Abstract: An apparatus and related method for automatically aligning one or more print head modules in an ink jet printing system are provided. A mounting supports and aligns a print head module with respect to three axes of movement. The mounting includes rotatable cams that contact control surfaces connected to the print head module to move the print head module in a desired direction. The related method automatically positions multiple stationary print heads with respect to three axes of movement, including rotational adjustment about a Z-axis. The method also automatically adjusts the position of a single print head with respect to its angular rotation about the Z-axis.