Abstract: An apparatus and method allows for mounting and aligning of the charge plate/catcher assembly and the droplet generator and has six degrees of freedom of adjustment, including three degrees of freedom of translation and three degrees of freedom of rotation. A first degree of freedom of translation comprises a height adjustment of the resonator relative to the charge plate; a second degree of freedom of translation comprises an alignment adjustment for aligning the plurality of jets with respect to the plurality of charge leads; and a third degree of freedom of translation comprises a reciprocal adjustment for moving the plurality of jets relative to the charge plate.

Abstract: A catcher for an ink jet print head is provided with locating features in the catcher throat to positively locate a catcher screen that serves to wick caught ink into the catcher throat, and a screen construction that resists compression of the screen without adversely affecting the ink flow in the catcher throat.

Abstract: An ink jet printing head, particularly intended for printing large characters, includes at least two modulation bodies having respective nozzles fitted with a device for adjusting each of the jets generated by the nozzles. A single module for recovering the ink with only one return line is incorporated in the head. The casing of the head receives, on its face, a support for a cover and, optionally, a second umbilical cover. For printing bar codes, the head provides a cascade sequencing of printed rasters with an increasing order of sequencing of droplets due to a charge voltage. The head is oriented to compensate for the inclination of the raster on the support.

Abstract: A continuous ink jet printer has main deflection electrodes 7 and 8 and a subsidiary deflection electrode 14 having a recess front face 16 which defines a cavity 17. Unwanted satellite droplets entrained by the main droplets 4 are deflected into, and form vortices in, the cavity 17, before coalescing on the surface of the electrode 14 for collection.