Xerox Corporation

Kenneth Ralph Chamberlain

Howard A Mizes

Steven Van Cleve Korol

Russell J Watt

Ernest I Esplin

Yeqing Zhang

John A Durbin

James Bruce Campbell

Susan June Zoltner

Bhaskar T Ramakrishnan

Andrew S Yeh

John Milton Brookfield

George Laurens Taylor

Joel Chan

Lisa Marie Schmidt

Ngoc-Diep Nguyen

Matthew Hudson Dixon

Luo Cheng

Katie Maria Teslow

Kelly D Sims

Jaclyn Nha Danh

A method of detecting print head roll begins with the formation of a test pattern on an image receiving surface. The test pattern includes a plurality of marks arrayed across the image receiving surface in a cross-process direction with each mark in the plurality being formed by a different nozzle of a print head. The cross-process direction positions of each mark in the plurality of marks are then detected; and the detected cross-process direction positions are correlated to a print head roll value for the print head.

Method and system for detecting print head roll

A method evaluates image quality in an ink printing system and generates data values for altering the operation of the ink printing system. The method includes generating an ink image on an ink image receiving member that corresponds to a digital image stored in the ink printing system, generating a scanned image signal corresponding to the ink image, generating firing signal waveform adjustments and image data adjustments with reference to the scanned image signal corresponding to the ink image, and operating a printhead in an ink imaging system with reference to the firing signal waveform adjustments and the image data adjustments.

System and method for adjusting operation of printheads in an ink printing device

A method of printing executes a software instruction using a print system controller to measure a vertical position of each row of an array of jets, having at least one offset subset of the array offset in a movement direction, adjusts timing of firing intervals for the offset subset such that the offset subset fire after a longer interval than other jets, and fires jets other than the offset subset at a predetermined firing interval. A print head has an array of transducers, an ink chamber to store ink arranged adjacent the array of transducers, and an array of jets arranged adjacent the ink chamber such that when selected ones of the array of transducers are activated, ink from the chamber exits a jet corresponding to the selected ones of the transducers, the array of jets having at least one subset of the array offset in a vertical direction relative to the other jets. A print system has a print head having an array of jets through which ink can be emitted, the array of jets having at least one subset of the array offset in a vertical direction relative to the other rows, an array of transducers arranged adjacent the array of jets to cause the jets to emit ink when activated, and a controller electrically coupled to the array of transducers to control the activation of the transducers.

Optimizaton of dot placement for thermal drift

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Oregon City, OR, United States of America

Kenneth Ralph Chamberlain