Hewlett-Packard Development Company, L.p.

Hewlett-Packard Company

Mark Sanders Taylor

Manish Giri

Jeremy Harlan Donaldson

Philip H Harding

Vladek P Kasperchik

Erik D Torniainen

Sriram Ramamoorthi

Craig Olbrich

Benjamin L Clark

Jeffery S Hess

Joshua M Yu

Joe E Stout

Carl Lan Wu

Byron K Davis

Mark David Johnson

Jeffrey S Hess

In one example, a printhead structure includes: a first layer; an array of openings in the first layer to form printing fluid ejection chambers; a second layer on the first layer; an array of orifices through the second layer, each orifice located adjacent to one of the openings in the first layer; a groove in the first layer spanning substantially a full length of the array of openings; and multiple holes through the second layer to the groove in the first layer.

Printhead structure

A fluid ejector device, including: a fluid nozzle layer defining an orifice therein; and at least one epoxy resin layer established on the nozzle layer, the at least one epoxy resin layer having first and second opposed surfaces with a thickness there between and a fluorine gradient formed therein such that the gradient extends into at least a portion of the thickness of the at least one epoxy resin layer, wherein an amount of a fluorinated species present in the at least one epoxy resin layer at the first opposed surface is greater than an amount of the fluorinated species present in the at least one epoxy resin layer at the second opposed surface that is adjacent the fluid nozzle layer.

Fluid ejector device

Imaging layers, image recording media, and methods of preparation of each, are disclosed.

Image recording media and image layers

A fluid delivery system includes a plurality of nozzles having an outer surface and a bore. A hydrophobic layer is applied to a portion of the outer surface of the nozzle and extends into the nozzle bore a determined distance.

Hydrophobic nozzle exit with improved micro fluid ejection dynamics

A system for sensing a property of a fluid comprises a fluid channel operable to receive the fluid therein, a flexible arm having a free end positioned within at least a portion of the fluid channel, a fluid actuator disposed sufficiently close to the flexible arm such that actuation of the fluid actuator induces movement of the flexible arm when the fluid is present, and a deflection sensing system operable to quantifiably detect movement of the flexible arm.

Cantilevers for sensing fluid properties

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.

Fluid ejection device having a layer with a discontinuity

Layer with discontinuity over fluid slot

Growing community of inventors

Monmouth, OR, United States of America

Mark Sanders Taylor