Abstract: An orifice plate is operatively secured to the open front end of an internally chambered piezoelectric ceramic body portion of an ink jet print head assembly material using an adhesive material. In securing these two components to one another, a layer of the adhesive material is applied to the front end of the print head body and the orifice plate is pressed against the adhesive layer. The ultimate bond strength of the adhesive material is substantially increased by the presence of a spaced plurality of bonding holes formed through the orifice plate and aligned with a spaced plurality of bonding openings extending inwardly through the front end of the print head body. As the orifice plate is pressed against the body, substantial portions of the initially applied adhesive material layer are forced into the aligned holes and openings.

Abstract: This universal acoustic coupler system is comprised of a pair of flexible muffs, which are rotatably mounted to permit connection to any length telephone handset receiver/transmitter; this feature also permits any varying angles of the earpiece and mouthpiece. Furthermore, the elastic structure of the muff permits the insertion of any size earpiece and mouthpiece, thereby allowing use of the muffs on an international scale. The muffs are comprised of a pair of elastic, generally circular housings, which include a speaker/microphone cavity and an earpiece/mouthpiece cavity, separated by an acoustic cavity. Features include flexible mounting arms or hinges attached to each of the muff housings. These arms have a circular aperture therein to accommodate a retaining pin which attaches the acoustic muff to an electronic input/output device.