Xerox Corporation

David Douglas Martenson

David Lyell Knierim

Michael E Jones

Brent Rodney Jones

Trevor James Snyder

Ernest I Esplin

Barry Daniel Reeves

Edward F Burke

James Bruce Campbell

Jamie Kelso

James B Jensen

Bjoern Erik Brunner

Lee D Hills

A method and apparatus for analyzing images deposited on an image receiving member of a printer, and more particularly analyzing images deposited on a surface of an imaging drum in an inkjet printer. A photoelectric sensor supported by a sled in contact with the surface of the imaging drum can be used to detect missing jets in the printhead, to align the printhead, to reduce the amount of purged ink, and to determine run out of the imaging drum.

System and method for analyzing images deposited on an image receiving member of a printer

A machine with a holder for mounting a motor to the device, which may be a printer, includes a support structure, a motor including a drive shaft with a drive shaft axis aligned with an opening in the support structure, and a holder including a base portion positioned adjacent to the motor, a first spring tab integrally formed with the base portion and operably contacting the motor to bias the motor toward the support structure, and a first latch arm integrally formed with the base portion and coupled with the support structure, the first latch arm resiliently deformed by the support structure in a direction away from the drive shaft axis.

Integrally formed motor holder

An optical encoder assembly has an encoder sensor, a code strip, and a base having a first portion and a second portion, wherein the encoder sensor is mounted on one of either the first portion or the second portion and the code strip is mounted on the other portion. An optical encoder assembly has a base having an upper base and a lower base, the upper base joined to the lower base with at least one flexible beam, an encoder sensor mounted to one of the upper base or the lower base, and a code strip mounted to the other of the upper base or the lower base. A method includes mounting an encoder sensor to a first mating surface on the first side of a base, mounting a code strip to a second mating surface on the second side of the base with the first and second sides of the base connected by at least one flexible beam, and attaching the base to an object to be measured such that deflections between the first and second mating surfaces can be measured using the encoder sensor.

Optical encoder assembly with a flexible beam

A printing device has an image receptor adapted to have an image formed thereon. The printing device also includes a transfer roller and a motor. A transfer roller load mechanism moves the transfer roller into contact with the image receptor in response to the motor output. A controller manipulates the motor in conjunction with a feedback signal from a load detector and regulates the load of the transfer roller.

Transfix roller load controlled by force feedback

An encoder home position sensing system and method is disclosed, which includes the use of an analog quadrature encoder reader and either a code wheel or a code strip. The code wheel possesses an optical track comprised of annular ring patterns, the thickness of which can be modulated by a sinusoidal function about the code wheel circumference, with one cycle of a sine wave corresponding to one encoder cycle. In one region of the optical track the amplitude of the sine function is changed to imbed an absolute reference home position. This region of the optical track can be sensed and used to determine an absolute system position. The linear code strip is similarly constructed with lines along the direction of motion, the thickness of which are modulated with a sine function, with one cycle of the sine wave corresponding to one encoder cycle, and the amplitude of the sine wave function changed to imbed an absolute reference home position in the optical track.

Encoder home position sensing method and system

An encoder position signal processing system comprises an analog encoder reader and a codewheel. The codewheel possesses an optical track that modulates the quadrature encoder signal amplitude in order to generate an amplitude change (home pulse) once per revolution of the codewheel. The analog encoder reader outputs a quadrature signal comprised of sine and cosine signals. The quadrature signal is converted to a magnitude signal that is sampled in order to generate a rate of change (ROC) signal, which increases the signal-to-noise ratio. An algorithm using the characteristic shape of the ROC home pulse signal can then be applied to the ROC signal to increases robustness of detecting the home pulse.

Position encoder's signal processing method and system

An optical encoder that includes an optical grating and a quadrature optical encoder sensor that move relative to each other. The optical grating includes a first encoder bar and a plurality of second encoder bars, wherein the first encoder bar is optically configured to change an amplitude of an output of the quadrature optical encoder sensor.

Position encoder

Disclosed are methods for compensating for failed ink jets in an ink jet apparatus. The method in embodiments determines if one or more ink jets are nonfunctioning or have failed and substitutes for the one or more nonfunctioning ink jets by using one or more operational ink jets. The operational ink jets used are neighboring operational ink jets that fill in for the one or more failed ink jets. The one or more failed ink jets are disabled wherein a primary image pass is performed followed by one or more additional imaging passes to fill in for the one or more disabled ink jets by enabling the one or more neighboring operational ink jets. The additional imaging passes may be a right fill imaging pass, a left fill imaging pass or a combination of both.

Ink jet processes

A system for detecting and characterizing media includes a light source, at least two sensors, and a media identification system. The light source is positioned to emit at least a portion of an illumination light towards a media path for media. The sensors are positioned to capture at least specular light and transmitted light from the emitted illumination light directed towards the media path for the media. The media identification system characterizes the media based on the captured specular and transmitted light

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Oregon City, OR, United States of America

David Douglas Martenson