Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Jeffrey S Hess

Manish Giri

Ralph L Stathem

Garrett E Clark

James P Kearns

Ashley E Childs

Philip H Harding

Glenn Thomas Haddick

Elizabeth Ann Visnyak

Holli C Ogle

Gilbert G Smith

Mark Sanders Taylor

Elizabeth A Fellner

Phil Harding

Jaynie Schonbrod

Steve D Napack

Glenn T Haddick

A fluid-jet precision-dispensing device includes a layer, one or more first holes within the layer, and one or more second holes within the layer. The first holes are adapted to pass fluid therethrough during usage of the device to precisely dispense the fluid at accurately specified locations. The second holes are adapted to not pass the fluid therethrough during usage of the device to precisely dispense the fluid at the accurately specified locations. The second holes may be adapted to at least substantially maximally pass gaseous bubbles therethrough during performance of a priming operation of the device. The second holes may be adapted to at least substantially maximally pass sludge and/or contaminants therethrough during performance of the priming operation of the device.

Fluid-jet precision-dispensing device having one or more holes for passing gaseous bubbles, sludge, and/or contaminants during priming

A fluid ejection device includes a substrate having a first side and a second side opposite the first side, and a plurality of drop ejecting elements formed on the first side of the substrate. The substrate includes a first opening formed in the first side and a plurality of second openings formed in the second side with each of the second openings communicating with the first opening, wherein the second openings and the first opening are adapted to circulate fluid through the substrate.

Circulation through compound slots

In one embodiment, a fluid ejection device comprises a substrate having a first surface, and a fluid slot in the first surface. The device further comprises a fluid ejector formed over the first surface of the substrate, and a chamber layer formed over the first surface of the substrate. The chamber layer defines a chamber about the fluid ejector, wherein fluid flows from the fluid slot towards the to be ejected therefrom. The chamber layer has a discontinuity, wherein the discontinuity is positioned over the fluid slot.

Layer with discontinuity over fluid slot

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Corvallis, OR, United States of America

Jeffrey S Hess