Hewlett-packard Company

Hewlett-packard Development Company, L.p.

Hewlett-packard Corporation

Other

Bruce Cowger

John A Barinaga

John A Underwood

Norman E Pawlowski

Susan M Hmelar

Paul David Gast

Marc A Baldwin

Robert R Beeson

Ronald W Hall

Winthrop D Childers

Joseph M Torgerson

Mark H MacKenzie

James E Clark

David O Merrill

John A Barinaga, Jr

David M Hurst

Michael L Bullock

Joseph R Elliot

John H Dion

Donald B Ouchida

Lowell R McDaniel

Fred E Tarver

Alan Shibata

Curt G Gonzales

Charles R Steinmetz

John M Altendorf

Glen E Schmidt

Mark Joseph Green

John Farrar Wilson

Thomas G Cocklin

John G Wydronek

Gary D Tarver

Norman Pawlowski, Jr

George M Custer

Mark H Mackenzie

Chien-Hua Chen

Steven B Elgee

Qin Liu

Eric L Gasvoda

Michael G Monroe

James G Bearss

Daniel D Dowell

Christopher A Schantz

C S Chan

Mark J Hauck

Gary E Hanson

Niels J Nielsen

Lawrence R Plotkin

David J Halko

John B Dunn

William J West

Matthew Jason Janssen

Kenneth A Norton

Mark L McCarty

Gar P Kelly

Ella M Duyck

Mary B Heffernan

William E Peters

Ron Prevost

Ronald E Prevost, Jr

In one example, a liquid delivery system for an inkjet type dispenser includes a reservoir to hold liquid, a chamber downstream from the reservoir, a one-way valve to allow the flow of liquid from the reservoir into the chamber and to block the flow of liquid from the chamber back into the reservoir, and a manually actuated pump to pull liquid from the reservoir into the chamber through the valve and to push liquid from the chamber toward a printhead.

Liquid delivery system for an inkjet type dispenser

In a three-dimensional printing method example, a build material, including an epoxy resin powder, is applied. A hardener liquid is selectively applied on at least a portion of the build material. The portion of the build material in contact with the hardener liquid is allowed to cure to form a layer of a 3D part. In another three-dimensional printing method example, a filler build material is applied. A liquid epoxy resin is selectively applied on at least a portion of the filler. A hardener liquid is selectively applied on the at least the portion of the filler. The portion of the filler in contact with the liquid epoxy resin and the hardener liquid is allowed to cure to form a layer of a 3D part.

Three-dimensional (3D) printing with epoxy resin

One example of a system includes a bulk ink assembly, a printhead assembly, a valve, and a controller. The bulk ink assembly receives a bulk ink supply. The printhead assembly includes nozzles to eject ink drops, a collapsible container to supply ink to the nozzles, and a sensor to provide a sensor signal indicating the amount of ink within the collapsible container. The valve supplies ink to the collapsible container from the bulk ink assembly in response to a control signal. The controller provides the control signal based on the sensor signal to regulate the amount of ink in the collapsible container and to provide an out of ink signal based on the sensor signal indicating the bulk ink supply is effectively empty.

Printhead assembly

A reservoir for an ink supply for an ink-jet printer is provided with a refill port through which it can be refilled. The reservoir may be coupled to a variable volume chamber via a check valve which allows the flow of ink from the reservoir to the chamber and limits the flow of ink from the chamber to the reservoir. The chamber is coupled to a fluid outlet which is normally closed to prevent the flow of ink. However, when the ink supply is installed in a printer, the fluid outlet establishes a fluid connection between the chamber and the printer. The chamber is part of a pump provided with the ink supply that can be actuated to supply ink from the reservoir to the printer. Alternatively, the reservoir may be coupled directly to the fluid outlet and an alternative method of transferring the ink to the printer provided.

Method and apparatus for providing ink to an ink jet printing system

The present disclosure relates to an inkjet printing system that includes an inkjet printhead having a plurality of electrical contacts. The plurality of electrical contacts include address contacts and enable contacts for enabling drop generators and drive current contacts for providing drive current to enable drop generators for selectively ejecting ink therefrom. The printing system includes a printing device having a plurality of electrical contacts including address contacts, enable contacts and drive current contacts. The plurality of electrical contacts are configured to establish electrical contact with corresponding electrical contacts on the inkjet printhead upon insertion of the inkjet printhead into the printing device. The printing device provides periodic address signals and enable signals to the address and enable contacts one the printhead. In addition, the printing device selectively applies drive current to accomplish forming images on print media.

Method and apparatus for transferring information to a printhead

An ink supply for an ink-jet printer is provided with a main reservoir, which is typically maintained at ambient pressure. The main reservoir is coupled to a variable volume chamber via a one-way valve which allows the flow of ink from the reservoir to the chamber and prevents the flow of ink from the chamber to the reservoir. The chamber is coupled to a fluid outlet which is normally closed to prevent the flow of ink. However, when the ink supply is installed in a printer, the fluid outlet establishes a fluid connection between the chamber and the printer. The chamber is part of a pump provided with the ink supply that can be actuated to supply ink from the reservoir to the printer.

Ink supply for an ink-jet printer

The present disclosure relates to an inkjet printhead having a plurality of drop generators responsive to drive current and address signals for dispensing ink. The inkjet printhead includes first and second drop generators disposed on the printhead with each of the first and second drop generators configured to receive drive current from a drive current source. Each of the first and second drop generators is configured to receive address signals from a common address source. The inkjet printhead further includes a switching device connected between the common address source and each of the first and second drop generators. The switching device is responsive to enable signals for selectively providing the address signal to only one of the first and second drop generators.

Method and apparatus for ejecting ink

The present disclosure relates to an inkjet printhead having a plurality of drop generators that selectively eject ink in response to activation. The inkjet printhead includes first and second drop generators disposed on the printhead. Each of the first and second drop generators are configured for connection to a source of drive current. The inkjet printhead also includes a control device configured for connection to a periodic address signal and first and second periodic enable signals. The control device is responsive to the first periodic enable signal and periodic address signal for enabling the first drop generator for activation in response to drive current. The control device is responsive to the second periodic enable signal and periodic address signal for enabling the second drop generator for activation in response to drive current.

Inkjet printhead and method for the same

The present invention is a replaceable ink container for use in a printing system. The printing system is of the type having a printhead mounted in a scanning carriage and a supply station for receiving the replaceable ink container. The supply station is in fluid communication with the printhead. The replaceable ink container includes a fluid outlet configured for engaging corresponding fluid inlet portions on the supply station. Also included is a first and second guide feature disposed on an outer surface of the replaceable ink container. The first and second guide features'are disposed and arranged to engage corresponding first and second guiding features disposed on opposite ends of the supply station to guide the replaceable ink container into the supply station to fluidically couple the fluid outlet and corresponding fluid inlet.

Ink container configured for use with compact supply station

The present disclosure relates to an ink supply container for containing ink. The ink supply container is configured for providing ink to an ink jet printing system. The ink container includes a first feature indicative of an ink family of a plurality of ink families associated with ink contained in the container. Also included is a second feature spaced from the first feature. The second feature is indicative of an ink color of a plurality of ink colors associated with ink in the container.

Method and apparatus for keying ink supply containers

The print heads of ink-jet pens are supplied with ink that is circulated to and from the print head. Passageways defined by the pen are oriented in fluid communication with the firing chambers of the print head and so that ink circulates in the vicinity of the chambers irrespective of whether the print head is activated for ejecting ink drops.

Ink circulation in ink-jet pens

A replaceable pump module for an ink-jet printer is configured to receive a replaceable ink supply including a reservoir having a fluid outlet. The replaceable pump module includes a variable volume chamber having a fluid inlet adapted to form a fluid connection with the fluid outlet of the ink supply reservoir. The variable volume chamber has a check valve which allows the flow of ink from the reservoir to the chamber and limits the flow of ink from the chamber to the reservoir. The replaceable pump module chamber also includes a fluid outlet. When the replaceable pump module is installed in a printer, the pump module fluid outlet establishes a fluid connection between the chamber and a fluid inlet of the printer. The chamber is part of a pump provided with the replaceable pump module that can be actuated to supply ink from the reservoir to the printer.

Replaceable pump module for receiving replaceable ink supplies to provide ink to an ink jet printing system

One aspect of the present invention is a replaceable ink supply cartridge for providing a pressurized supply of ink to an ink-jet printhead of an ink-jet printer. The replaceable ink supply cartridge includes an activation portion for receiving a linear actuator associated with the ink-jet printer. The linear actuator has an activated state and an inactivated state. In the activated state the linear actuator is biased toward an extended position into engagement with the activation portion. In the inactivated state the linear actuator is in a retracted position. The ink supply cartridge portion provides a source of pressurized ink in response to the activated state of the linear actuator. Wherein in response to the inactivated state of the linear actuator the source of pressurized ink is non-pressurized.

Ink cartridge having an integral pressurization apparatus

Growing community of inventors

Corvallis, OR, United States of America

Bruce Cowger