Xerox Corporation

Erwin Ruiz

Paul Michael Fromm

Linn C Hoover

Steven Matthew Russel

Jeffrey John Bradway

Rachel Lynn Tanchak

Jeffrey Nyyssonen Swing

Ali Rafic Dergham

Douglas K Herrmann

Ron Edward Dufort

Derek Albert Bryl

Carlos Manuel Terrero

Patrick Jun Howe

Chu-Heng Liu

Paul J McConville

Jason Mathew LeFevre

Andrew Wayne Hays

Roberto A Irizarry

Glenn David Batchelor

Melissa Ann Monahan

David A VanKouwenberg

Christopher Douglas Atwood

Jorge Mario Rodriguez

James A Winters

Gregory P Miller

David Allen Mantell

Christopher A Jensen

Peter M Gulvin

Jack Gaynor Elliot

David Mark Kerxhalli

David S Derleth

David Keneth Ahl

Christopher T Chungbin

Robert W Phelps

Piotr Sokolowski

Kareem N Tawil

Charles T Facchini

Paul F Brown, Ii

Brendan McNamara

Seemit Praharaj

Mandakini Kanungo

Eliud Robles Flores

Patricia Joanne Donaldson

Augusto E Barton

Michael Nicholas Soures

Arthur Harold Kahn

Brendan H Williamson

David Lalley

Anthony Salvatore Condello

Steven Robert Moore

Palghat Srinivas Ramesh

William H Wayman

Eric Scott Hamby

Peter John Knausdorf

James J Spence

Joseph C Sheflin

Martin Edward Hoover

Timothy Patrick Foley

Jack Thomas Lestrange

Paul F Sawicki

Mark A Atwood

Joseph M Ferrara, Jr

Faming Li

Mark A Adiletta

Douglas E Proctor

John E Derimiggio

Robert Steven Pozniakas

Kenneth R Rasch

Bruce H Smith

David R Kamprath

Robert Bruce Anderson, Jr

Jonathan Ross Ireland

Robert M Jacobs

Martin L Frachioni

David Charles Irving

John Thomas Buzzelli

Steven J Fiore

Donald E Thresh

Richard A Kalb

Kirk V Pothos

John T Newell

Richard C Benton

Stephen D Cipolla

John Patrick Baker

Bruce Allen Thompson

Brian M Balthasar

Mark Stevens

Ahmed-Mohsen T Shehata

Timothy D Slattery

Robert Jian Zhang

Charles J Bennett

Megan Zielenski

Emmett James Spence

James D Van Bortel

Daniel Raymond Knopp

Julie Marie Hanfland

Charles Scott Kneisel

Ka Hei Fung

Michael L Povio

Alicia Schwenk Mruthyunjaya

A color changing expiration indicator includes a reactive layer and a first barrier layer that covers at least a portion of the reactive layer. The color changing expiration indicator also includes a transmission layer that covers at least a portion of the first barrier layer, and a second barrier layer that covers at least a portion of the transmission layer. The color changing expiration indicator further includes a reactant layer that covers at least a portion of the second barrier layer. The reactant layer changes color responsive to a reaction that occurs between the reactant layer and the reactive layer.

Color changing expiration indicator

A method includes printing, by one or more printer heads of the printing system, a reactive layer onto print media. The method also includes printing, by the one or more printer heads, a determined number of transmission layers and a determined number of barrier layers in alternation with one another. At least a portion of the reactive layer is configured to migrate through the transmission layers. The method further includes printing, by the one or more printer heads, a reactant layer that is configured to change color responsive to a reaction that occurs between the reactant layer and the reactive layer upon migration of the reactive layer through the determined number of transmission layers. The reaction is configured to occur on a received expiration date.

A material drop ejecting three-dimensional (3D) object printer identifies a time lag error corresponding to a time lag in the response of printer components to component commands. The identified time lag error is provided to a slicer program that uses the identified time lag error to compensate for the time lag in the response of the printer components.

System and method for calibrating lag time in a three-dimensional object printer

A slicer in a material drop ejecting three-dimensional (3D) object printer generates machine ready instructions that operate components of a printer, such as actuators and an ejector having at least one nozzle, to form features of an object more precisely than previously known. The instructions generated by the slicer control the actuators to move the ejector and a platform on which the object is formed relative to one another at a constant velocity to form edges of the feature.

System and method for reducing drop placement errors at perimeter features on an object in a three-dimensional (3D) object printer

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 comprises a movable support surface to transport a print medium along a process direction through the deposition region, the media transport device holding the print medium against the movable support surface by vacuum suction. The air flow control system is arranged to selectively flow air through the opening of the carrier plate between the carrier plate and the printhead based on a location of a print medium transported by the media transport device relative to the printhead.

Devices, systems, and methods for supplying makeup air through openings in carrier plates of printing system

A slicer in a material drop ejecting three-dimensional (3D) object printer generates machine ready instructions that operate components of a printer, such as actuators and an ejector having at least one nozzle, to form features of an object more precisely than previously known. The instructions generated by the slicer use positional data from an encoder to control the actuators to move the ejector and a platform on which the object is formed relative to one another to form edges of the feature.

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 printhead to eject a print fluid through an opening of a 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 is to flow air through the carrier plate to the movable support surface via a port through the carrier plate on an inboard side the carrier plate and to control a flow rate of the air flowed through the port based on a size of a print medium transported by the media transport device.

Devices, systems, and methods for supplying makeup air through ports in a carrier plate of a printing system

A tandem system of metering and donor rolls is used to apply two different adhesives to a fully adhesive backed multilayer sheet to produce variably distributed adhesives and properties. Each of the two adhesives is unique and is cured differently to create a layer of adhesive that has differing adhesive properties on the sheet. A clear adhesive is applied to a top portion of cards before they are cut from the sheet and has a higher tackiness than the adhesive applied to the rest of the cards on the sheet in order to reduce glue buildup on blades cutting the cards from the sheet.

Dual pressure sensitive adhesive sheet for instore signage

A universal object holding mechanism for holding three-dimensional objects for printing thereon uses multiple conformable balls mounted within a pattern of holes in a two part back plate. The multiple conformable balls are pressed into an object, which in turn, is pressed against a datum surface that represents desired spacing away from print heads. Vacuum is applied to the multiple conformable balls which grip the object. The multiple conformable balls are filled with particulates that cause the multiple conformable balls to become rigid when the vacuum is applied. This contributes to keeping the object from moving when it is being moved past a print head.

Apparatus for general object holding during printing using multiple conformable gripper balls

A method for determining a temperature of an object includes contacting the object with a first electrical conductor. A difference in electronegativity between the object and the first electrical conductor is greater than a predetermined value. The method also includes contacting the object or a substrate on which the object is positioned with a second electrical conductor. A difference in electronegativity between the object or the substrate and the second electrical conductor is less than the predetermined value. The method also includes connecting the first and second electrical conductors together. The method also includes measuring the temperature of the object using the first and second electrical conductors. The first and second electrical conductors form at least a portion of a thermocouple.

System and method for determining a temperature differential between portions of an object printed by a 3D printer

A method operates a three-dimensional (3D) metal object manufacturing system to maintain a temperature of an uppermost layer of a 3D metal object being formed within a temperature range conducive for bonding between the uppermost layer and a next layer to be formed. A controller of the system compares a temperature of the uppermost layer with at least a low end temperature of the temperature range and operates an electrical resistance switching network using 3D model data to provide electrical power selectively to heating elements in a modular heater to heat the 3D metal object being formed when the temperature indicated by the signal from the sensor is less than the predetermined temperature.

Method and system for operating a modular heater to improve layer bonding in a metal drop ejecting three-dimensional (3D) object printer

A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes monitoring operating parameters of a component in the MFD, calculating a life set point for the component based on the operating parameters, and changing a default life set point for the component stored in a memory of the MFD to the life set point that is calculated based on the operating parameters.

Modifying stored life set points for components in a multi-function device

A system for determining a temperature of an object includes a three-dimensional (3D) printer configured to successively deposit a first layer of material, a second layer of material, and a third layer of material to form the object. The 3D printer is configured to form a recess in the second layer of material. The material is a metal. The system also includes a temperature sensor configured to be positioned at least partially with the recess and to have the third layer deposited thereon. The temperature sensor is configured to measure a temperature of the first layer of material, the second layer of material, the third layer of material, or a combination thereof.

System and method for determining a temperature of an object

A system treats uneven surfaces of additive manufactured objects to improve the transparency and glossiness of the surfaces. The system operates an actuator to dip the additive manufactured object into a bath of fluid material that is the same as the material used to form the uneven surface to smooth the surface of the object and operates a sprayer to apply another fluid material to a surface of the object that is identified as being rougher based on the object's geometric data. A heater is provided to dry non-UV curable material applied to the object and a source of UV radiation is provided to cure UV curable material applied to the object.

System for finishing the surface of three-dimensional (3D) objects formed by additive manufacturing systems

Printing apparatuses include (among other components) a photoreceptor (that is adapted to contact and transfer marking material to a printing side of sheets of media), a transport belt adjacent the photoreceptor, a baffle, and an air outlet. The sheets of media are moved by the photoreceptor across a gap to the transport belt in a 'processing direction.' The baffle is adjacent the back side of the sheets of media (the side that is opposite to the printing side of the sheets of media). The air outlet is also positioned adjacent the back side of the sheets of media, and the air outlet is adapted to direct a stream of air along the baffle and between the baffle and the back side of the sheets of media to lift the sheets of media off the photoreceptor without damaging the sheets of media or disturbing the unfused marking material thereon.

Air-based photoreceptor sheet stripper

Growing community of inventors

Rochester, NY, United States of America

Erwin Ruiz