Fluid dispenser

Details Fluid dispenser Fluid dispenser

1991-01-04

1992-10-20

Bollinger, David H.

Dispensing

With discharge assistant

With bypass or return to supply

222394, 222399, 222486, B65D 8854

Patent

active

051563061

ABSTRACT:
A fluid dispenser for use, for example, in an ink jet printing head, comprises a switching device, preferably a bistable fluidic device, which switches fluid under pressure between a path in which the fluid circulates back to the fluid source and a second path in which it issues from a jet. The fluidic device is preferably formed by micro-machining cavities in a silicon substrate, or in two substrates which are then bonded together face to face. A printing head may be formed by locating a number of the dispensers in side-by-side relation with spacers therebetween, the spacers being used to provide feed paths for the ink.

REFERENCES:
patent: 4057807 (1977-11-01), Fishbeck et al.
patent: 4390886 (1983-06-01), Sultan
patent: 4784295 (1988-11-01), Holmstrand
patent: 4793515 (1988-12-01), Shannon et al.

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