Hewlett-packard Development Company, L.P.

Other

Garrett E Clark

Michael W Cumbie

Mark H MacKenzie

James Richard Przybyla

Richard W Seaver

Galen P Cook

Frank D Derryberry

Rio Rivas

Chris Bakker

Ed Friesen

Eric T Martin

Anthony M Fuller

Silam J Choy

Bradley D Chung

Kelly Ronk

Ozgur E Yildirim

Chien-Hua Chen

Si-lam Choy

Jeremy Sells

Daryl E Anderson

Ralph L Stathem

Manish Giri

James A Feinn

Devin Alexander Mourey

Duane A Koehler

Vincent C Korthuis

Jeffrey R Pollard

Angela White Bakkom

Tsuyoshi Yamashita

Andrew F Phillips

Philip H Harding

Glenn D McCloy

Si-Lam J Choy

Bhavin Shah

Si-Iam J Choy

Rosanna L Bigford

Jacob Lum

Lawrence Thurber

Rogelio Cicili

Glenn Thomas Haddick

Holli C Ogle

Elizabeth Ann Visnyak

Gilbert G Smith

Jose Luis Valero

Curt Lee Nelson

Christopher Hans Bakker

Mark Mackenzie

Jeffrey S Hess

Michel Macler

Phil Harding

Vincent Gerard Heesen

Elizabeth A Fellner

Yit Hong Tor

Guan Kwee Goh

Glory J Abadilla

Michele D Friesen

Jaynie Schonbrod

Jeremy Spencer

Mengqian Lu

Glenn T Haddick

Vincent Gerard Heesen Jr

Jacob M Lum

Galen Cook

Mark H Mackenzie

Mark H Mackenize

Glenn D Mccloy

In some examples, a fluidic die includes an arrangement of fluidic elements to dispense a fluid, where each fluidic element of the fluidic elements includes a fluidic actuator and a fluid chamber. The fluidic die includes an array of fluid feed holes in a plurality of dimensions to communicate the fluid with the fluidic elements, where each of multiple fluid feed holes along a first dimension of the plurality of dimensions is distinct from multiple fluid feed holes along a second dimension of the plurality of dimensions. The fluidic die includes circuit elements interspersed in regions between the fluidic elements along different axes of the fluidic die, where each circuit element of the circuit elements includes an active device. The fluidic elements and the circuit elements are formed on a common substrate.

Interspersed fluidic elements and circuit elements in a fluidic die

A fluidic die includes fluid-transfer elements, and a temperature sensor to monitor a temperature on the fluidic die. The fluidic die includes a trickle-warming circuit to warm fluid transferrable by the fluid-transfer elements, and a pulse-warming circuit to warm the fluid. A warming control circuit selectively activates the trickle-warming and pulse-warming circuits.

Fluidic die having trickle-warming and pulse-warming circuits

An example fluid ejection device comprises a plurality of distinct fluid channels. Each fluid channel comprises a distinct fluid inlet to the ejection device. A subset of the plurality of distinct fluid channels comprises fluid recirculating fluid channels, and the remaining fluid channels comprising non-recirculating fluid channels.

Fluid channels of different types

A fluid ejection die may include a fluid actuator, a substrate supporting the fluid actuator, a chamber layer supported by the substrate and a bypass passage in the substrate. The substrate may include a closed inlet channel having an inlet opening for connection to an outlet of a fluid source and an outlet channel having an outlet opening of a first size for connection to an inlet of the fluid source. The chamber layer includes a recirculation passage to supply fluid for ejection by the fluid actuator through an ejection orifice and to circulate fluid across the fluid actuator from the closed inlet channel to the outlet channel. The bypass passage is of a second size less than the first size and connects the inlet channel to the inlet of the fluid source while bypassing any fluid actuator provided for ejecting fluid through an ejection orifice.

Recirculation bypass

An example printhead includes a circulation channel having an inlet for receiving a fluid and an outlet for expelling the fluid, a first nozzle fluidically coupled to the circulation channel, the first nozzle being operable at a first absolute pressure, and a second nozzle fluidically coupled to the circulation channel, the second nozzle being operable at a second absolute pressure, the absolute second pressure being lower than the first absolute pressure. The absolute pressure in the circulation channel decreases as the fluid flows from the inlet to the outlet, and the first nozzle is positioned closer to the inlet of the circulation channel than the second nozzle.

Printhead with circulation channel

In some examples, a fluid ejection die includes a plurality of nozzles arranged in a plurality of nozzle columns, the plurality of nozzle columns distributed across a width of the fluid ejection die in a staggered manner, wherein nozzles of each respective nozzle column of the plurality of nozzle columns are spaced apart along a length of the fluid ejection die, wherein the plurality of nozzle columns includes a first pair of neighboring nozzle columns that are spaced by a first distance across the width. The plurality of nozzle columns includes a second pair of neighboring nozzle columns that are spaced by a second distance across the width, the second distance being larger than the first distance.

Nozzle arrangements

Examples include a fluid ejection device. The fluid ejection device includes a fluid ejection die with a die length and a die width, the fluid ejection die being coupled with a support structure having a fluid supply channel therethrough. The fluid ejection die includes a plurality of nozzles arranged in columns at die length positions along the die length and die width positions along the die width such that only one nozzle is positioned at each die length position. A fluid ejection chamber is coupled with each respective nozzle of the plurality of nozzles, and fluid feed hole fluidically coupled with the fluid supply channel and each respective ejection chamber.

Nozzle arrangements and supply channels

Examples include microfluidic devices. Example microfluidic devices comprise a microfluidic channel, a capillary chamber, and a fluidic actuator. The microfluidic channel is fluidly connected to the capillary chamber. The capillary chamber is to restrict flow of fluid therethrough. The fluidic actuator is positioned proximate the capillary chamber. The fluidic actuator is to actuate to thereby initiate flow of fluid through the capillary chamber.

Microfluidic device with capillary chamber

A fluid ejection die may include a number of fluid ejection chambers laid to correlate with a number of dividers formed in a fluid channel layer such that adjacent fluid ejection chambers are alternatively arranged on a relatively higher-temperature side of the fluid ejection die and a relatively lower-temperature side of the fluid ejection die.

Fluid ejection dies

Examples include a fluid ejection device. The fluid ejection device includes at least one fluid ejection die coupled to a support structure and having a die length and a die width. The at least one fluid ejection die may include a plurality of nozzles arranged along the die length and a die width. The plurality of nozzles is arranged such that at least one pair of neighboring nozzles are positioned at different die width positions along the width of the fluid ejection die. The at least one fluid ejection die further includes a plurality of ejection chambers including a respective ejection chamber fluidically coupled to each respective nozzle. The at least one fluid ejection die further includes an array of fluid feed holes. The array of fluid feed holes includes at least one fluid feed hole fluidically coupled to each respective ejection chamber.

A fluid ejection device may include fluid actuators, ejection chambers adjacent the fluid actuators, nozzles extending from the ejection chambers, and fluid feed holes to supply fluid from a fluid supply passage to the ejection chambers. The fluid feed holes have ports connected to the ejection chambers. The ports are sized to pass bubbles formed by the fluid actuators out of the ejection chambers.

Fluid feed hole port dimensions

Examples include a fluid ejection die having a die length and a die width. The fluid ejection die may include a plurality of nozzles arranged along the die length and a die width. The plurality of nozzles is arranged such that at least one pair of neighboring nozzles are positioned at different die width positions along the width of the fluid ejection die. The example fluid ejection die further includes a plurality of ejection chambers including a respective ejection chamber fluidically coupled to each respective nozzle. The fluid ejection die further includes an array of fluid feed holes. The array of fluid feed holes includes a first respective fluid feed hole fluidically coupled to each respective ejection chamber, and the array of fluid feed holes includes a second respective fluid feed hole fluidically coupled to each respective ejection chamber.

Nozzle arrangements and feed holes

A fluid propelling apparatus, including a plastic compound, a MEMS at least partially surrounded by the compound, and a heat sink next to the MEMS, to transfer heat away from the MEMS, wherein the heat sink is at least partly surrounded by the compound.

Fluid propelling apparatus including a heat sink

The present disclosure includes a description of an example printhead having multiple ejection dies. The ejection dies are coupled to a temperature sensor and send temperature signals to a controller. The printhead can also include a heater coupled to the ejection dies to apply heat to at least one ejection die.

Printheads

Growing community of inventors

Corvallis, OR, United States of America

Garrett E Clark