Hydrodynamically damped pressure pulse droplet ejector
AssigneeXerox Corporation
InventorsKenneth H. Fischbeck, Stig-Goran Larsson, S. Bertil Sultan
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Abstract
An energy dissipative element is used in a pressure pulse drop ejector. The element is designed to efficiently eliminate unwanted meniscus vibration. In one embodiment, one or more relatively thin screens are placed in the liquid flow path to simultaneously damp both hydraulic and acoustic vibrations.
Claims2
A pulsed pressure drop ejecting apparatus wherein a transducer (1) is utilized to compress liquid (13) in a channel (15) to express a droplet from an orifice (23) upon application of a signal to the transducer (1), the improvement comprising the addition of at least one energy dissipative element (25, 27) in the channel (15) so as to achieve simultaneous acoustic impedance matching and near critical hydraulic damping.
Dependencies are inferred from the claim text.