Xerox Corporation

Additive Technologies LLC

Other

Xeroc Corporation

Jason Mathew LeFevre

Douglas K Herrmann

Paul J McConville

Chu-Heng Liu

Seemit Praharaj

Michael Jon Levy

David A VanKouwenberg

Linn C Hoover

Derek Albert Bryl

James Michael Chappell

Santokh Singh Badesha

Anthony Salvatore Condello

Erwin Ruiz

Joseph C Sheflin

Steven Robert Moore

James Edward Williams

James A Winters

Timothy Patrick Foley

Paul S Bonino

Rachael L McGrath

Joanne L Lee

Palghat Srinivas Ramesh

Varun Sambhy

Jorge Antonio Alvarez

David Alan Vankouwenberg

Robert Paul Herloski

Steven Matthew Russel

Jack Thomas Lestrange

Ali Rafic Dergham

Thomas Jay Wyble

Glenn David Batchelor

Brian M Balthasar

Paul Michael Fromm

Roger Gaylord Leighton

Dale Robert Mashtare

Peter John Knausdorf

Jack T LeStrange

Grace T Brewington

Carlos Manuel Terrero

Daniel M Bray

Frank Berkelys Tamarez Gomez

Joseph M Ferrara, Jr

Patrick Jun Howe

Daniel James McVeigh

Richard A Kalb

John Patrick Baker

Robert Jian Zhang

Jennifer Rea

Emmett James Spence

Megan Zielenski

Jin Wu

David Allen Mantell

Karen Ann Moffat

Pinyen Lin

Bruce Earl Thayer

Howard A Mizes

Peter M Gulvin

Michael Stephen Roetker

John F Knapp

Jordan H Wosnick

Andrew Wayne Hays

James J Spence

Adam Douglas Ledgerwood

Robert Alan Clark

Michael F Leo

Michael Nicholas Soures

Martin Edward Hoover

Christopher Douglas Atwood

David Clark Craig

Kyle B Tallman

Jeffrey John Bradway

Scott J Griffin

Christopher G Lynn

David S Derleth

David M Skinner

Richard W Seyfried

Alexander J Fioravanti

Shu Chang

Timothy R Jaskowiak

Bruce H Smith

Elizabeth Crossen

Rachel Lynn Tanchak

George Cunha Cardoso

Richard Alan Campbell

Jonathan Ross Ireland

John Paul Meyers

Annie Liu

Donald E Thresh

Martin Franklin Zess

John T Newell

James R Beachner

Kareem N Tawil

Reid Wayne Gunnell

Jan Marie Enderle

Christopher M Mieney

David P Vanbortel

Eric Robert Dudek

James D Van Bortel

Kelly J Burton

Michael J Severn

A method of operating a printer identifies image areas and image features in ink image content data that are likely to produce ink blur within an ink image. The ink image content data for these areas and features is modified to attenuate the appearance of ink blur. The image areas identified as being likely to produce ink blur are the trailing edge and the side edges of the ink image content data. The modification of the ink image content data for the features and predetermined areas improves the quality of the printed ink image.

System and method for varying ejected ink drop volumes to improve ink image quality in an inkjet printer

A three-dimensional (3D) metal object manufacturing apparatus is equipped with a movable directed energy source to melt hardened metal drops and form an oxidation layer. A metal support structure can be formed over the oxidation layer, an object feature can be formed over the oxidation layer, or both a metal support structure and an object feature can be formed over oxidation layers located at opposite sides of a metal support structure. The oxidation layers weakly attach the metal support structure to the object feature supported by the metal support structure so the support structure can be easily removed after manufacture of the object is complete.

Metal drop ejecting three-dimensional (3D) object printer and method of operation for forming metal support structures

A method of automatically diagnosing media handling defects on sheets, the method including receiving a first image of a first sheet, determining that the first image includes a detected media handling defect, determining that the detected media handling defect matches one or more known media handling defects in a database, and displaying a rectifying action.

System and method for automatically diagnosing media handling defects in a printing device

A method of operating a printer evaluates the effect of printing a print job with two different orientations of the image content data for the print job. The orientation that produces the least increase in the cross-process direction displacement error for the inkjets in the printer is selected for printing the print job. By attenuating the increase in cross-process direction displacement error, the interval between printhead maintenance operations is increased.

System and method for printing color images on substrates in an inkjet printer

A dross extraction system for a printer is disclosed, which includes an ejector defining an inner cavity associated therewith, the inner cavity retaining a liquid printing material. The dross extraction system also includes a first inlet coupled to the inner cavity of the ejector, a probe external to the ejector, which is selectably positionable to contact the liquid printing material to attract dross thereto, thereby extracting dross from the liquid printing material when the probe is withdrawn from the liquid printing material. A method of extracting dross from a metal jetting printer is also disclosed, which includes pausing an operation of the metal jetting printer, advancing a probe into a melt pool within a nozzle pump reservoir in the metal jetting printer, extracting dross from the metal printing material and onto the probe, retracting the probe from the nozzle pump reservoir, and resuming the operation of the metal jetting printer.

Dross extraction system and methods thereof

A three-dimensional (3D) metal object manufacturing apparatus is equipped with two solid metal moving mechanisms that are independently operated to move two different metals into the receptacle of a vessel in a melted metal drop ejecting apparatus. The ejector is operated to form object features with melted metal drops of one of the two different metals and to form support features with melted metal drops of the other of the two different metals. The thermal expansion coefficients of the two metals are sufficiently different that the support features easily separate from the object features after the object and support features cool.

A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device holds a print medium against the movable support surface by vacuum suction and transports the print medium through the deposition region. The air flow control system comprises an air supply unit comprising air flow guide structure extending into the opening of the carrier plate between the carrier plate and the printhead to flow air through the opening. The air flow control system controls the air supply unit to selectively flow the air based on a location of a print medium relative to the printhead.

Devices, systems, and methods for supplying makeup air through openings in carrier plates of printing systems via air guide structures extending into the openings

A method of operating an inkjet printer identifies a thermal load that will be imposed on the printheads in the inkjet printer during execution of a print job and identifies a remedial action to reduce the thermal load if the thermal load increases the temperature of the printheads above an upper threshold of a predetermined temperature range. The thermal load is identified from the ink image content data for the print job, the print job parameters for the print job, and environmental condition measurements received from sensors in the printer. The remedial actions include manipulation of the print job queue, alteration of print job parameters, and active cooling to remove heat from the printheads or media within the printer.

System and method for feed forward control of printhead temperature in an inkjet printer to improve ink image quality

A three-dimensional (3D) printer is configured to introduce a liquid metal onto a first part and a second part while the first part and the second part are in contact with one another. The liquid metal subsequently solidifies to join the first part and the second part together to produce an assembly.

Micro-welding using a three-dimensional printer

A three-dimensional (3D) metal object manufacturing apparatus is equipped with a removable vessel to reduce the time required for start-up procedures after the printer is serviced. The removable vessel is filled with solid metal that is heated to its melting temperature before the bulk wire is inserted into the vessel to commence printing operations. The melting of the solid metal in the removable vessel requires less time that the melting of an length of bulk wire adequate to produce a volume of melted metal suitable for printer operation. The solid metal in the removable vessel can be metal pellets, metal powder, or a solid metal insert.

Metal drop ejecting three-dimensional (3D) object printer and method for preparing the metal drop ejecting 3D object printer for printing

A multi-sheet cooling buffer suitable for use in a printing device and a method of sheet processing with the cooling buffer are described. The cooling buffer includes an inlet and an outlet and a sheet cooling mechanism. An array of cooling stations, intermediate the inlet and the outlet, are each configured to receive print media sheets independently from the inlet and direct cooled sheets towards the outlet. In the cooling buffer, multiple print media sheets are able to be cooled contemporaneously in respective ones of the cooling stations.

Sheet cooling system for a printing device

A printing system comprises a printhead to eject ink through an opening in a carrier plate to a deposition region. A print medium is held against a movable support surface by vacuum suction communicated through platen holes of a vacuum platen and transported through the deposition region. An airflow control system comprises upstream and downstream valves associated with the printhead, individually addressable channels for the vacuum platen, or both. The upstream and downstream valves are arranged to selectively block and allow airflow through an upstream side or a downstream side, respectively, of the opening in the carrier plate. Actuation of the upstream and downstream valves may be controlled based on a location of the print medium. The channels are arranged to selectively control the supply of vacuum suction to respectively corresponding columns of platen holes. Actuation of the channels may be controlled based on a size of the print medium.

Airflow control in a printing system, and related devices, systems, and methods

A printing system comprises a printhead to eject a print fluid to a deposition region. Print media are held against a movable support surface via vacuum suction, and the movable support surface transports the print media through the deposition region. A vacuum plenum comprises a vacuum platen over which the movable support surface moves. The vacuum platen has platen holes that communicate the vacuum suction from the vacuum plenum to the movable support surface. An airflow restriction mechanism forms a high impedance zone in the vacuum platen, the high impedance zone comprising a subset of the platen holes. The airflow impedance through the high impedance zone is relatively high compared to the airflow impedance through another subset of the platen holes, which are part of a low impedance zone. The high impedance zone may be located near the printhead to reduce airflow through uncovered platen holes near the printhead.

Airflow control via airflow zones in vacuum plenum of a printing system, and related devices, systems, and methods

Alignment apparatuses include a frame and contact elements connected to the frame. The contact elements contact items that are to be transported in a processing direction relative to the frame. The contact elements are in permeant fixed positions relative to the frame, and do not move relative to the frame. Adjustable mounts are connected to the frame and move the frame in the processing direction and in a perpendicular cross-processing direction. A controller is electrically connected to the adjustable mounts, and the controller is adapted to control the adjustable mounts to simultaneously move the frame and all the contact elements in the cross-processing direction and the processing direction while rotating the frame. Methods laterally shift imaging on sheets that have had rotational correction performed by such alignment apparatuses.

Sheet registration using rotatable frame

A printing system comprises a printhead to eject a print fluid to a deposition region. A movable support surface, such as a belt, is used to transport print media through the deposition region, with the print media being held against the movable support surface by vacuum suction through holes in the movable support surface. A media registration device loads print media onto the movable support surface and registers the print media to a location of the movable support surface. The movable support surface comprises no-suction-regions in which the vacuum suction through the movable support surface is prevented. The no-suction regions extend across the width of the movable support surface in a cross-process direction and are arranged at predetermined intervals along the process direction. The control system causes the media registration device to register each of the print media relative to a respective one of the no-suction-regions.

Airflow control in a printing system via media registration, and related devices, systems, and methods

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Penfield, NY, United States of America

Jason Mathew LeFevre