Xerox Corporation

Hewlett-Packard Development Company, L.p.

Other

Dennis A Abramsohn

Joseph C Mammino

Donald S Sypula

Deborah J Nichol-Landry

John W Spiewak

Santokh Singh Badesha

Damodar M Pai

John S Berkes

Merlin E Scharfe

Frank J Bonsignore

Paul J Brach

Neville R Phillips

David H Pan

Edward L Schlueter, Jr

Arnold W Henry

Gerald M Fletcher

Huoy-Jen Yuh

George J Heeks

Gabriel Scott McDaniel

Moritz Patrick Wagner

Constance J Thornton

Louis D Fratangelo

Jimmy E Kelly

Jeff Luke

Clifford H Griffiths

Diane Marie Foley

John A Frank

Shy-Shung Hwang

Donald J Robertson

Allen W Denham

Lois A Eckstrom

John F Yanus

Kathleen M Carmichael

William W Limburg

Dale S Renfer

Robert C Yu

James R Larson

Jan Philip Allebach

Donald J Fasen

Dasarao K Murti

Richard L Schank

Quintin T Phillips

Ronald F Ziolo

Paul J DeFeo

Fred W Schmidlin

Martin A Abkowitz

Mark Q Shaw

Arthur M Gooray

Sean Daniel Fitzgerald

Brendan C Casey

Steven J Grammatica

Steve A Jacob

Oscar G Hauser

Andrew R Melnyk

Robert J Lawton

Scott K Hymas

George Tsu-Chih Chiu

Christine J Tarnawskyj

Brian E Springett

Stephen M Borostyan

Anthony M Wallace

Donald J Teney

Neil S Patterson

Lieng-Huang Lee

William L Gary

Edward C Williams

Robert W Anderson

Brent L Meyer

Jerome P Chasko

Yuehwern Yih

J Michael Ishler

Mike Allyn

Roberta Gayle Fothergill

Chei-Jen Chen

Christopher P Murschel

YanFu Kuo

Chao-Lung Yang

An example apparatus includes a packaging container, and any of a label and an electronic tag detachably connected to the packaging container and including an electrical code set for electrical authentication upon removal of any of the label and the electronic tag from the packaging container and being affixed to a device associated with the packaging container, wherein the electrical authentication is to validate the packaging container and the device as original equipment manufacturer components. Any of the label and the packaging container is altered upon removal of the label from the packaging container.

Authentication of devices by indicators on device packaging

Examples disclosed herein relate to magnetic carrier bead separation in dual-component printing. The present disclosure relates generally to a device, method, and system for magnetic carrier bead separation. In an example, a printing device includes a developer sump to hold a plurality of carrier beads. The example device also includes a roller to move a subset of the plurality of carrier beads from an attachment point on the roller to a release point through a rotation of the roller, wherein the subset of the plurality of carrier beads return towards the developer sump after they are released at the release point. The device includes a magnetic separator located between the release point and the attachment point that guides a magnetized carrier bead of the plurality of carrier beads away from the developer sump and the roller.

Magnetic carrier bead separation

Examples described herein relate to a print substance container consistent with the disclosure. For instance, the print substance container may comprise a print substance disposed inside of the print substance container and a first electromagnet formed of a wire coil positioned around the print substance container and extending along a length of the print substance container.

Electromagnets and print substance containers

A photo-conductor drum includes: a cylindrical surface to receive a charge pattern corresponding to an image to be printed; and a protective layer of material coating at least a portion of the cylindrical surface to protect the cylindrical surface from damage prior to installation of the drum in a printing device.

Photo-conductor drum with protective layer of material

Control parameters of a printing device are optimized using a process model to reduce a process tone reproduction curve (TRC) error between a process TRC and a desired TRC. Tone-corrected halftone levels for the printing device are generated using a sensor model to reduce a printing device TRC error between a TRC of the printing device and the desired TRC, based on color patches printed by the printing device using the control parameters as have been optimized, as measured by one or more sensors of the printing device.

Tone reproduction curve error reduction

A logic module is to identify whether to print a standard printout or an erasable printout. A print module is to print the erasable printout in response to the identifying by the logic module. The erasable printout includes an erasable feature not present in the standard printout.

Erasable printouts including erasable features

Various systems, methods, and programs embodied in computer readable media are provided for calibration of at least one half-tone density in a printer. In one approach, a method is provided comprising the steps of acquiring a plurality of half-tone density values from a respective plurality of test patches generated on a belt in the printer over a period of time, each of the test patches embodying an intended half-tone density, generating a mathematically smoothed half-tone density value from the half-tone density values, and calibrating a half-tone density in the printer based upon the mathematically smoothed half-tone density value.

Calibration of half-tone densities in printers

Various embodiments and methods relating to a pixel are disclosed.

Pixel

A printer includes a color measurement system. The printer can, in response to a trigger event, automatically calibrate the color measurement system using a first print medium of a first media type.

Color calibration in a printer

A gyricon platen cover provides a black background behind an original document and a white background surrounding the document to mitigate show-through of the back side of the document while the front side of the document is being scanning. The gyricon platen cover also provides a black background for the document for pre-scan detection of the location of the edges of an original document for electronic registration, electronic skew correction and automatic magnification selection during scanning of the original document.

Gyricon platen cover for show-through correction

A discharge device usable in an electrostatographic printing machine uses a plurality of emissions to discharge an image receiver, such as a photoreceptor, of the printing machine. The discharge device can be used as a charge erase device, a reconditioning device, an imaging device, or a combination of these. In embodiments, the different emissions come from different groups of emitters within the device, such as from rows of emitters or from groups interspersed within a single row. In other embodiments, at least some of the emitters are tunable and can emit more than one type of emissions. For example, tunable LEDs could be employed in the device.

Printing machine discharge device including pluralities of emitters for different degrees of image receiver charge manipulation

A development system including a housing, a developer roll mounted in the housing, for depositing marking particles on an imaging surface having an electrostatic latent image thereon, an auger, for mixing and transporting the marking particles and carrier constituents of the developing material and; transferring mixed developer material to the developer roll, the auger comprising an elongate strip of magnetic material having a helix structure; a nonmagnetic sleeve enclosing the elongate strip of magnetic material; and means for rotating the elongate strip of magnetic material within the nonmagnetic sleeve, the elongate strip of magnetic material generates a magnetic field for transporting the developer material axially along an outer surface of the nonmagnetic sleeve when rotated by the rotating means.

Auger for magnetic materials with specific use for developer transport in elelctrographic printing systems

Xerographic printers may be provided with a photoreceptor belt manufactured so that transparent permanent optical registration marks are formed in defined selected minor areas of the belt without physically weakening the belt, as is the case with belt holes. These permanent registration marks are sufficiently transparent for a conventional belt holes sensor to optically detect them by illumination through those transparent areas of the photoreceptor. The photoreceptor is preferably a plural layer organic photoreceptor with an internal optically opaque metallic ground plane layer, and the optical registration marks are formed by oxidizing defined areas thereof. This may be accomplished by the simultaneous selective application of illumination to these selected minor areas of the photoreceptor, while adjacent areas of the photoreceptor are not illuminated, plus the application of electrical current from a voltage source applied through the belt in those areas.

Permanent photoreceptor registration marking and method

An apparatus for measuring triboelectric charge applied by a material to a flexible member is provided. The apparatus includes a frame and a drum. The drum is used for mounting the member to an external periphery thereof. The drum is rotatably mounted to the frame. The apparatus also includes a mechanism including a motor for rotating the drum, the mechanism operably associated with the drum. The apparatus also includes a support for supporting the material in intimate contact with the flexible member. The material and the member form a triboelectric charge on the external surface of the member. The material includes a material portion thereof in intimate contact with the member at a first member position on an external periphery of the member. The apparatus also includes a charge measuring device operably associated with the drum for measuring an electrical field emanating from the member. The charge measuring device includes a measuring device portion thereof positioned proximate to a measured position on an external periphery of the member. The mechanism is cooperable with the member to rotate the member. The charge measuring device is adapted to measure a charge at the measured position after the member is so rotated.

Charge measuring instrument for flexible materials

An electrostatographic printing machine that includes an erase light source that reduces the quantity of charges on the photoreceptor surface and a reconditioning light source that reduces both the quantity of the trapped charges and the variation in the quantity of the trapped charges among the different portions of the image area.

Printing machine with reconditioning light source

Growing community of inventors

Pittsford, NY, United States of America

Dennis A Abramsohn