Xerox Corporation

Other

Palo Alto Research Center Inc.

Mark Anthony Cellura

Peter Johan Nystrom

Gary Daniel Redding

David Allen Mantell

Bryan R Dolan

Scott J Phillips

Peter M Gulvin

John Richard Andrews

Elliott A Eklund

Santokh Singh Badesha

Donald J Drake

Christopher G Lynn

Raja Bala

Palghat Srinivas Ramesh

Mandakini Kanungo

Hong Zhao

Yanjia Zuo

Richard P Germain

Pratima Gattu Naga Rao

Vijay Kumar Baikampady Gopalkrishna

Lyle G Dingman

Andrew Wayne Hays

Elias Panides

Jun Ma

Chad David Freitag

Chad Johan Slenes

John Paul Meyers

Jon Garret Judge

Gerald A Domoto

Jonathan Robert Brick

David R Koehler

Bijoyraj Sahu

Garry A Jones

Chu-Heng Liu

Barry Paul Mandel

Kock-Yee Law

Michael Jon Levy

Roger Gaylord Leighton

Varun Sambhy

Michael F Leo

Barry Daniel Reeves

Juan J Becerra

Bradley James Gerner

Kraig A Quinn

Peter I Majewicz

Michael P O'Horo

John Frank Walsh

Xuejin Wen

Samuel Vincent Schultz

Yuanjia Zhang

Reinhold E Drews

Hung C Nguyen

Robert M Rottman

Igor Podzorov

George Shannon

Antonio St C L Williams

Jim Casella

Elliot Allan Eklund

Antonio St Cl Williams

John P Meyeres

Jeffrey D Barner

Igor A Podzorov

A 3D printer includes a nozzle configured to jet a drop of liquid metal therethrough. The 3D printer also includes a light source configured to illuminate the drop with a pulse of light. A duration of the pulse of light is from about 0.0001 seconds to about 0.1 seconds. The 3D printer also includes a camera configured to capture an image, video, or both of the drop. The 3D printer also includes a computing system configured to detect the drop in the image, the video, or both. The computing system is also configured to characterize the drop after the drop is detected. Characterizing the drop includes determining a size of the drop, a location of the drop, or both in the image, the video, or both.

System and method for characterizing liquid metal drops jetted from a 3D printer using a strobe light

A method includes illuminating a drop with a pulse of light from a light source. A duration of the pulse of light is from about 0.0001 seconds to about 0.1 seconds. The method also includes capturing an image, video, or both of the drop. The method also includes detecting the drop in the image, the video, or both. The method also includes characterizing the drop after the drop is detected. Characterizing the drop includes determining a size of the drop, a location of the drop, or both in the image, the video, or both.

Nozzles for an additive manufacturing device and methods for improving wettability of the nozzles are disclosed. The method may include subjecting the nozzle to a surface treatment. The surface treatment may include contacting a surface of the nozzle with one or more surface modifying agents. The surface modifying agents may include one or more of an oxidizing agent, an acid, a base, or combinations thereof. The one or more surface modifying agents may increase an oxygen content of the surface of the nozzle. An inner surface of the nozzle may have a water contact angle of greater than 1&#xb0; and less than about 90&#xb0;. The inner surface of the nozzle may be free or substantially free of a coating.

Surface treated additive manufacturing printhead nozzles and methods for the same

A method includes capturing a video of a plurality of drops being jetted through a nozzle of a printer. The method also includes measuring a signal proximate to the nozzle based at least partially upon the video. The method also includes determining one or more metrics that characterize a behavior of the drops based at least partially upon the signal.

Characterizing meniscus behavior in 3D liquid metal printing

A 3D printer includes a nozzle and a camera configured to capture an image, a video, or both of a plurality of drops of liquid metal being jetted through the nozzle. The 3D printer also includes a computing system configured to measure a signal proximate to the nozzle based at least partially upon the image, the video, or both. The computing system is also configured to determine one or more metrics that characterize a behavior of the drops based at least partially upon the signal.

An additive manufacturing system includes a heater for converting a filament of extrusion material into thermoplastic material. The heater has a channel configured to change the cross-sectional shape of the filament to a cross-sectional shape that has a greater surface area than the surface area of the filament before the heater receives the filament. The channel of the heater can also be configured to drive the center portion of the filament toward the heated walls of the channel and to mix thermoplastic material in the channel while exposing the center portion of the filament to the heated wall of the channel.

Filament heaters configured to facilitate thermal treatment of filaments for extruder heads in three-dimensional object printers

An apparatus includes a heater for converting a filament of extrusion material into thermoplastic material. The heater has a channel configured to change the cross-sectional shape of the filament to a cross-sectional shape that has a greater surface area than the surface area of the filament before the heater receives the filament. The channel of the heater can also be configured to drive the center portion of the filament toward the heated walls of the channel and to mix thermoplastic material in the channel while exposing the center portion of the filament to the heated wall of the channel.

A method for identifying an angular deviation in the orientation of a multi-nozzle extruder includes moving the multi-nozzle extruder in a first process direction to form a first extrusion material swath and moving the multi-nozzle extruder in a second process direction opposing the first process direction to form a second extrusion material swath. The method further includes identifying widths and heights of the swaths from scanned image data and identifying a component of angular deviation for the multi-nozzle extruder with reference to at least one of a difference between the first swath width and the second swath width and another difference between the first swath height and the second swath height.

Method for alignment of a multi-nozzle extruder in three-dimensional object printers

A multi-nozzle extrusion printhead includes a chamber with an inlet to receive an extrusion material and a plurality of outlets fluidly coupled to the chamber. The printhead also includes a plurality of valves that control flow of extrusion material through the fluid outlets to nozzles in the printhead. Each valve includes a member and an electromechanical actuator configured to move the member to a first position to block a flow of the extrusion material through one of the fluid outlets and nozzles and to a second position to enable the flow of the extrusion material through the fluid outlet and nozzles.

Extrusion printheads for three-dimensional object printers

A method for identifying an angle of roll for a multi-nozzle extruder includes moving the extruder in a first process direction to form a first set of swaths of extrusion material using two nozzles in the extruder and moving the extruder in a second process direction to form a second set of swaths of extrusion material. The method further includes identifying a location of one nozzle relative to the other nozzle in two dimensions based on cross-process direction distances between the first and second sets of swaths and identifying the angle of extruder roll for the extruder based on the location of the one nozzle and a predetermined geometry of the extruder.

System and method for roll alignment of a multi-nozzle extruder in three-dimensional object printers using cross-process measurements

System and method for alignment of a multi-nozzle extruder in three-dimensional object printers

A method for forming piezoelectric transducers for inkjet printheads includes: forming at least one piezoelectric layer on a substrate; forming at least one electrode pattern by depositing a conductive material on an exposed surface of the at least one piezoelectric layer; and forming a plurality of individual piezoelectric elements from the at least one piezoelectric layer before or after the forming of the at least one electrode pattern.

Method of forming piezo driver electrodes

An adhesive compound can include an uncured epoxy film having a curing temperature between about 80&#xb0; C. and about 300&#xb0; C. The uncured epoxy film can include a cresol novolac epoxy resin and a bisphenol A epoxy resin. The uncured epoxy film can have a thickness between about 0.1 mil and about 5 mil.

Use of epoxy film adhesive with high ink compatibility and thermal oxidative stability for printhead interstitial bonding in high density printheads

A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks, solid inks, and aqueous inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.

B-stage film adhesive compatible with aqueous ink for printhead structures interstitial bonding in high density piezo printheads fabrication for aqueous inkjet

A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.

Raised fluid pass-through structure in print heads

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Webster, NY, United States of America

Mark Anthony Cellura