Abstract: A fluid flow device, a method of moving fluid, and a printing system incorporating the device are provided. The fluid flow device includes a passage for a fluid including a wall with the wall having a travel path. A fluid flow source is operable to cause the fluid to flow in a direction through the passage. The travel path of the wall is in the same direction as that of the fluid flow.

Abstract: A printing system includes a liquid drop ejector, a fluid flow device, and a fluid flow source. The liquid drop ejector is operable to eject liquid drops having a plurality of volumes along a first path. The fluid flow device includes a first section comprising a plurality of sub-channels created by a partition and a second section comprising a plurality of sub-channels created by a partition. Each partition has a height as viewed from a wall of the fluid flow device. The height of the partition of the second section is less than the height of the partition of the first section. The fluid flow source is operable to produce a fluid flow through the fluid flow device. The fluid flow interacts with the liquid drops to cause liquids drops having one of the plurality of volumes to begin moving along a second path.

Abstract: A printing system includes a source of liquid including a liquid outlet. The source of liquid includes a liquid with particles. A liquid vibrating mechanism is operably associated with the source of liquid. A controller is operably associated with the liquid vibrating mechanism. The controller is configured to control a desired direction of movement of the particles of the liquid by causing the liquid vibrating mechanism to vibrate the liquid with a non-symmetric energy such that movement of the particles is biased in the desired direction.

Abstract: A printing system includes a liquid drop ejector that is operable to eject liquid drops having a plurality of volumes along a first path. A fluid passage includes an energy damping structure. A fluid flow source is operable to cause the fluid to flow through the passage along the energy damping structure. Interaction of the fluid flow and the liquid drops causes liquid drops having one of the plurality of volumes to begin moving along a second path.

Abstract: A continuous drop emitter comprising a liquid supply chamber containing a liquid held at a positive pressure; first and second nozzles in fluid communication with the liquid supply chamber nozzles emitting first and second continuous streams of a liquid; first and second stream break-up transducers adapted to independently synchronize the break up of the first and second continuous streams of the liquid into first and second streams of drops of predetermined volumes, respectively; and an acoustic damping material located adjacent to or within the liquid supply chamber for damping sound waves generated within the liquid chamber by the first and second stream break-up transducer. The continuous drop emitter may also configured with a Helmholtz resonant chamber tuned to a critical stimulation frequency having an acoustic damping material therein for absorbing acoustic stimulation energy.