Xerox Corporation

Additive Technologies LLC

Seemit Praharaj

Douglas K Herrmann

Chu-Heng Liu

Paul J McConville

Jason Mathew LeFevre

Michael Jon Levy

Linn C Hoover

David A VanKouwenberg

Jason Matthew LeFevre

Jorge Antonio Alvarez

Jason M LeFEVRE

Anthony Salvatore Condello

Varun Sambhy

Joseph C Sheflin

Thomas Jay Wyble

John T Newell

Stuart Alan Schweid

Palghat Srinivas Ramesh

Ali Rafic Dergham

Patrick Jun Howe

Glenn David Batchelor

David Alan Vankouwenberg

Brian M Balthasar

Jason Lefevre

Santokh Singh Badesha

Erwin Ruiz

Mandakini Kanungo

Peter John Knausdorf

Timothy Patrick Foley

Jack Thomas Lestrange

Richard A Kalb

John Patrick Baker

Robert Jian Zhang

Megan Zielenski

Emmett James Spence

Matthew L Gesner

Kenneth E VanDeWater

Husein Naser Kasim Rashed

Naveen Chopra

David Allen Mantell

C Geoffrey Allen

Paul Michael Fromm

Carolyn Patricia Moorlag

Jack T LeStrange

Robert Alan Clark

Carlos Manuel Terrero

Michael Nicholas Soures

Martin Edward Hoover

Christopher Douglas Atwood

Jeffrey John Bradway

David S Derleth

Rachel Lynn Tanchak

Christine Ann Steurrys

Bruce H Smith

Richard Alan Campbell

Jonathan Ross Ireland

John Paul Meyers

Donald E Thresh

Christopher M Mieney

Kareem N Tawil

James D Van Bortel

Senthil Sivaraman

Yumeng Wu

Baharak Bakhshaei

Douglas L Herrmann

A method of operating an inkjet printer operates solvent vapor generators that direct two flows of solvent vapor towards media on each side of each printhead in the process direction. The solvent vapor attenuates the evaporation of ink solvent from ink drops on the nozzle plates or from the ink in the nozzles of the printheads. Thus, the ink on the nozzle plates and in the nozzles does not dry out and the operational status of the inkjets is preserved.

Method for preserving ink viscosity in inkjets in an inkjet printer during printing

An inkjet printer includes a waste ink treatment system and a humidification chamber to separate waste ink produced by a printhead maintenance station into solid ink pigment particles and a solvent stream and use the solvent stream to maintain inkjets in the printheads of the inkjet printer in operational status. The waste ink treatment system mixes the waste ink with a metal salt to precipitate the solid ink pigment particles out of the waste ink. The solvent stream remaining after the precipitation of the pigment particles is humidified and directed to air baffles positioned on opposite sides of each printhead in every other printhead module in the process direction. A kit is provided to retroactively modify an existing inkjet printer to treat the waste ink and use the solvent stream to maintain the operational status of the inkjets in the printheads of the inkjet printer.

System and method for printing ink images in accordance with sustainability goals

An inkjet printer and method of operating the inkjet printer ejects ink drops onto coated areas of a media transport exposed in the inter-document zones between successive media sheets passing through a print zone of the printer to maintain the operational status of the inkjets ejecting the ink drops. Absorbent material is positioned outside of the print zone to contact the media transport and remove the ejected ink drops from the coated areas. The absorbent material can be configured about two rollers so operating an actuator to rotate one of the rollers pulls absorbent material from a supply roll to a take-up roll to provide clean absorbent material for removal of the ejected ink drops from time to time.

System and method for operating an inkjet printer to attenuate ink drying in the inkjets during printing operations

Methods and systems for securely rendering a security feature with image data to be printed, can involve providing within the image data, data relating to a group of spots, and within the image data, mixing spots of two or more spot sizes among the group of spots to embed information within a stochastic or frequency modulation halftone image. In an embodiment, operations may be implemented for rendering a part of the image with a first spot among the group of spots and a remaining portion of the image with a second spot among the group of spots, wherein the second spot is smaller in size than the first spot.

Security printing using mixed spot sizes in stochastic or frequency modulated halftone images

An inkjet printer and method of operating the inkjet printer modifies the image content data for an ink image to be printed on a media sheet to maintain the operational status of each inkjet in the inkjet printer. For each inkjet that is operated less than an operational threshold, image data is added to the image content data to operate each inkjet at the operational threshold.

An inkjet printer prints on a first side of a media sheet less than all of the color separations in an image, generates a first set of image data of the printed color separations to identify image features, returns the partially printed media sheet to a position that precedes the print zone in the printer, generates a second set of image data of the partially printed media sheet before it reenters the print zone to identify the image features, compares the positions of the image features in the first set of image data to the positions of the image features in the second set of image data to register one or more color separations remaining to be printed with the color separations printed on the first side of the media sheet, and prints the remaining registered color separations on the first side of the partially printed media sheet.

System and method for improving ink image quality in an inkjet printer

Disclosed is a system and method for cooling paper within a printer assembly that includes at least one misting assembly designed to mist an aqueous solution onto an unprinted surface of paper stock after a first side is printed. At least one convection accelerator assembly is designed to accelerate evaporation of the aqueous solution before the printed paper stock arrives at the at least one printing station for printing on the unprinted surface. At least one or more of a paper temperature, machine temperature, printhead temperature, and humidity sensor are operationally coupled to at least one controller assembly programmed to control at least one or more of misting, humidity, and airflow. The at least one controller assembly is designed to determine the heat to be dissipated into the airflow from the printed paper stock to obtain a targeted paper temperature and, therefore, the amount and placement of aqueous solution misted.

System and method for cooling paper within a printer assembly

A three-dimensional (3D) metal object manufacturing apparatus is configured to increase the oxidation of ejected melted metal drops for the formation of metal support structures during manufacture of a metal object with the apparatus. The oxidation can be increased by either increasing a distance between the ejector head and a platform supporting the metal object or by providing an air flow transverse to the direction of movement of the melted metal drops, or both.

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

Devices include first and second frame elements having mounting points connectable to opposite ends (e.g., first end, second end) of the touchscreen. First and second rollers are connected, respectively, to the first and second frame elements. A web of transparent material is supported by and between the first and second rollers. Further, an ultraviolet light device is connected to the second frame element and is positioned to expose the web of transparent material to ultraviolet radiation to disinfect the transparent material between users.

Scrolling protective film system for touchscreen

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 method of operating a printer identifies image areas in ink image content data that are likely to affected by airflow disturbances to produce ink blur within an ink image. Inkjets farthest from these areas are selected to eject ink drops into these areas to form portions of an ink image. The image areas identified as being likely to produce ink blur are the leading edge, trailing edge, and side edge of the ink image content data. The ink drops ejected by these selected inkjets and their satellites are less likely to be affected adversely by the airflow disturbances.

System and method for selecting inkjets to improve ink image quality in an inkjet printer

Printing methods and devices identify distortable ink colors in a print job. These distortable ink colors interact with one another when printed in the same printing pass on the same area of a sheet. These methods and devices control printheads and sheet feeders to separately print the distortable ink colors in different print passes.

Graininess mitigation using separate printing passes for distortable colors

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.

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 inkjet printer operation produces a sneeze pattern having a uniform sneeze pattern portion and a tapered area portion within the uniform sneeze pattern to operate inkjets in the printer to eject ink drops within an image area of media sheets passing through the printer to maintain the operational status of the inkjets. A dynamic threshold is applied to a portion of an uniform sneeze pattern to produce the tapered area within the uniform sneeze pattern. The dynamic threshold is changed as a function of distance between a pixel in the portion of the uniform sneeze pattern and the closest edge of an image area of the media sheet on which the tapered area of the sneeze pattern is to be printed. A second threshold can also be changed to alter a volume of ink associated with a pixel in the tapered area within the uniform sneeze pattern.

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Webster, NY, United States of America

Seemit Praharaj