Hewlett-packard Development Company, L.P.

Hewlett-packard Company

Arun K Agarwal

Lawrence H White

Ron Burns

Chien-Hua Chen

Michael W Cumbie

Timothy L Weber

Robert C Maze

Jules G Moritz

Matthew David Giere

Neal W Meyer

Todd A Cleland

Satya Prakash

Kit C Baughman

Ozgur E Yildirim

Julie J Cox

Jennifer M Korngiebel

Harold Lee Van Nice

Salim Khasawinah

Ronald Albert Askeland

Douglas A Keszler

Manish Giri

James Elmer Abbott, Jr

James A Feinn

Silam J Choy

Greg Scott Long

Noah C Lassar

Kenneth J Courian

Jeremy Harlan Donaldson

Hiang P Lauw

Steven T Castle

Roberto A Pugliese

Bradley D Chung

Zia Ur Rehman

Blair M Kent

Darrel R Bloomquist

Paul A Richards

Galen P Cook

James Pingel

John F Wager, Iii

Stephen Horvath

Mark A Buonanno

David William Jenkins

Mark Buonanno

Stephan P Howe

John M McGlone

Kristopher Olsen

Elizabeth A Fellner

Julie Jo Cox

Jules G Moritz Iii

In one example, a process for making a micro device structure includes molding a micro device in a monolithic body of material and forming a fluid flow passage in the body through which fluid can pass directly to the micro device.

Molding a fluid flow structure

Printheads and printers are described herein. In one example, a printhead includes a plurality of nozzles configured to eject ink drops of different sizes wherein a low drop weight (LDW) drop is ejected through a nozzle with a circular bore (CB), and a high drop weight (HDW) drop is ejected through a nozzle with a non-circular bore (NCB).

Ink jet printing

In an embodiment, a fluid flow structure includes a micro device embedded in a molding. A fluid feed hole is formed through the micro device, and a saw defined fluid channel is cut through the molding to fluidically couple the fluid feed hole with the channel.

Molded fluid flow structure with saw cut channel

Printheads and printers are described herein. In one example, a printhead includes a number of drop generators disposed in a first array and a second array. The drop generators in both the first array and the second array are spaced one dot pitch apart perpendicular to the motion of a print medium, and alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. Each drop generator in the first array is in a line of the motion of the print medium with a corresponding drop generator in the second array, wherein each HDW drop generator in the first array is in line with an LDW drop generator in the second array, and each LDW drop generator in the first array is in line with an HDW drop generator in the second array.

In one example in accordance with the present disclosure a printer cartridge is described. The printer cartridge includes multiple backpressure chambers in fluid communication with a shared free fluid chamber. The backpressure chambers are to supply a fluid to nozzles of a portion of a fluidic ejection assembly and to provide backpressure to the nozzles of the fluidic ejection assembly during deposition of fluid onto a print medium.

Printer cartridge with multiple backpressure chambers

Printing methods and systems are described herein. In one example, a method includes rasterizing a document to create color rasters and linearizing the color rasters to create high drop weight (HDW) planes and low drop weight (LDW) planes. HDW and LDW halftone planes are created from the HDW and LDW planes. The HDW and LDW halftone planes are masked to create HDW and LDW printhead maps, and the HDW and LDW printhead maps are merged into print data. The print data is sent to a number of printheads.

Ink jet printing with high drop weight (HDW) planes and low drop weight (LDW) planes

A replaceable integrated printhead cartridge is provided that comprises a liquid reservoir and a linear nozzle array being disposed in a bottom and extending perpendicular to a longitudinal axis.

Replaceable integrated printhead cartridge

The present disclosure is drawn to a thermal inkjet printhead stack with an amorphous thin metal protective layer, comprising an insulated substrate, a resistor applied to the insulated substrate, a resistor passivation layer applied to the resistor, and an amorphous thin metal protective layer applied to the resistor passivation layer. The amorphous thin metal protective layer can comprise from 5 atomic % to 90 atomic % of a metalloid of carbon, silicon, or boron. The film can also include a first and second metal, each comprising from 5 atomic % to 90 atomic % of titanium, vanadium, chromium, cobalt, nickel, zirconium, niobium, molybdenum, rhodium, palladium, hafnium, tantalum, tungsten, iridium, or platinum. The second metal is different than the first metal, and the metalloid, the first metal, and the second metal account for at least 70 atomic % of the amorphous thin metal protective layer.

Thermal inkjet printhead stack with amorphous thin metal protective layer

A fluid dispenser is disclosed herein. An example of such a fluid dispenser includes a housing configured to store a quantity of fluid and an ejection assembly configured to controllably emit the fluid through a nozzle. The fluid dispenser also includes a fluid chamber configured both to supply a quantity of the fluid to the ejection assembly and to define a fluid flow path between the housing and the ejection assembly. The fluid dispenser further includes a filter positioned in the fluid flow path and configured both to conduct the fluid from the housing to the fluid chamber and to restrain particles in the fluid from entering the fluid chamber. The filter is further configured to define a bubble flow path that facilitates conduction of bubbles from the fluid chamber to the housing. Additional features of this fluid dispenser are disclosed herein, as are other examples of fluid dispensers.

Fluid dispenser

The present disclosure is drawn to dice with polymer ribs. In one example, a die structure can comprise a die having a plurality of die slots, the die having polymer ribs attached to one side thereof, wherein the polymer ribs are attached using a polymer film on one side of the die, said polymer film having portions removed along the die slots to form the polymer ribs which bridge the die slots, thereby forming a plurality of polymer bridged die slots.

Dice with polymer ribs

Growing community of inventors

Corvallis, OR, United States of America

Arun K Agarwal