Xerox Corporation

Bruce J Parks

Eliud Robles Flores

Jamie S Clayfield

Michael Quoc Lu

Douglas A Lundy

Eliud Robles-Flores

James D Walsh

Gerald F Daloia

Douglas S Smith

Gerald M Fletcher

William R Burger

Edward C Hanzlik

D Clay Johnson

John S Vouros

Aaron Michael Burry

Peter Paul

Palghat Srinivas Ramesh

Eric Scott Hamby

David Bradley Montfort

Christopher David Blair

Richard W Seyfried

Martin Krucinski

Joy L Longhenry

Joseph M Wing

Jerry Floyd Adams

David B Playfair

Robert E Rosdahl, Jr

Lawrence R Benedict

Andrew James Bonacci

Darryl L Pozzanghera

John F O'Brien

Hector J Sanchez

Thomas Paul Debies

Michael A Fayette

Robert A Pictor

Charles M Gardiner

Ahmed-Mohsen T Shehata

Gaith O Zayed

Christopher A Dirubio

Edward W Schnepf

David J Lemmon

Fei Xiao

Alfred J Claflin

Evan P Kastner

Robert J Mead

Michael J Price

A Lance Marchese

John Fox

Ahmad Haroon

John D Head

John W Whipple

Jeffry Welch

Virginia A Marqueling

Andrew T McKenna

A belt installation guide is disclosed which accommodates the loading in a belt module of a new belt around drive rollers. The guide is placed opposite the end portions of the rollers, the belt is slipped over the guides and held by the guides until the belt is pushed over the rollers. The guides can be attached to the belt module or can be detachable therefrom. Once in place over the rollers, a tension is exerted on the belt to make it taut over all of the rollers. The guide is removed from near the rollers after the belt is in place over the rollers.

Belt installation guides

A system and apparatus that removes and collects non-functional wire assemblies from dicorotron units is described. It has a removal tool with flexible levers mounted on the top of a storage box. The removal tool has an open top and bottom, the open bottom is aligned with an opening in the top of the box to permit a dislodged anchor and wire assembly to fall therethrough.

Tool for dicorotron wire assembly removal and storage

This is a device for cleaning a corona grid used in electrostatic printing or copying machines. This device has a cleaner pad that cleans the outer surface of the grid, that is the surface closest to the photoreceptor surface. This pad is located between the outer surface of the grid and the surface of the photoreceptor. It can be used together with a cleaner pad that cleans the inner surface of the grid.

Corona device grid cleaner

A belt installation guide is disclosed which accommodates the loading of a new belt around drive rollers in a belt module assembly. The guide is placed opposite the end portions of the rollers, the belt is slipped over the guides and held by the guides until the belt is pushed over the rollers. Once in place over the rollers, a tension is exerted on the belt to make it taut over all of the rollers. The guide is removed from near the rolls after the belt is in place over the rollers. The guide when not in use is positioned in housings internal to the rollers, or in housings adjacent to the rollers. The guides are enabled to be removed or pulled out from these housings when ready for use in installing a belt in a belt module.

An element, or elements, of a collection chamber which may remove excess deposition of particulate matter without interrupting or otherwise disturbing the normal operation of the device are provided. These elements may oscillate within a collection chamber and substantially remove any particulate matter which may be deposited, and accumulate, within the collection chamber over time. Such an oscillation and removal of undesirably deposited particulate matter may be performed without substantially interfering with the ability of particulate matter to travel through the chamber or space. The element or elements may comprises but are not limited to, one or more plastic wiping elements, or one or more spring-like wire form structures. Additionally, one or more post processing systems and methods, for final disposal, transformation, or processing of the particulate matter which travels through the collection chamber may be provided.

System and method for preventing particulate matter deposition on contact surfaces

This is a cleaning blade useful in an electrophotographic marking system. Under certain conditions, cleaning blades will tuck when the blade continuously contacts a photoconductive surface of this marking system. This tucking causes abrading and damage to the moving photoconductive surface. To prevent or minimize tucking, a blade stiffener is used in this invention in either an add-on or as a part of the originally-manufactured elastomeric blade.

Cleaning blade edge stiffener to improve blade tucking robustness

Embodiments herein comprise a printing apparatus having a media path and a printing engine along the media path. The printing engine comprises a back up roll having an outer surface and an inner surface, a bias roll adjacent the outer surface of the back up roll, a photoreceptor belt, and a transfer belt. The bias roll is positioned with respect to the back up roll to form a nip between the bias roll and the back up roll. A portion of the photoreceptor belt is in the nip between the bias roll and the back up roll, and a portion of the transfer belt is in the nip between the bias roll and the photoreceptor belt. A transducer (e.g., an ultrasonic piezoelectric device) is contacting the inner surface of the back up roll. The transducer is physically connected to the back up roll in a manner such that the transducer transfers vibrations to the back up roll and to the photoreceptor belt. For example, in one embodiment, the transducer contacts and is physically biased against the inner surface of the back up roll.

Ultrasonic backer for bias transfer systems

Embodiments herein include a transfer assist blade that is adapted to bias media toward a marking device. The transfer assist blade has a plurality of movable blade segments that overlap one another. In one embodiment, a first movable blade segment (comprising a first wear layer and a first underlying layer beneath the first wear layer) overlies a second movable blade segment (comprising a second wear layer and a second underlying layer beneath the first wear layer). More specifically, in this embodiment, a portion of the first wear layer overlaps a portion of the second wear layer.

Segmented transfer assist blade

There is disclosed a system for cleaning marking material from a surface portion of a movable photoconductive member. The system includes a first rotatable brush, a blade and a second rotatable brush arranged in sequential order along the movable photoconductive member. The first rotatable brush is for removing a first amount of marking material from the surface portion of the movable photoconductive member as the surface portion of the movable photoconductive member moves past said first rotatable electrostatic brush. The blade, in engaging contact with the movable photoconductive member, is for removing a second amount of marking material from the surface portion of the movable photoconductive member. The second rotatable brush, positioned in interference contact with the movable photoconductive member, is for removing substantially all residual marking material that was not removed by the first rotatable brush and the blade.

Blade brush cleaner

A photoconductor belt cleaning system is described. This system can utilize in one embodiment one cleaning brush and a cleaning blade, and in a second embodiment, two cleaning brushes, brushand brush, with a cleaning blade. In the second embodiment, the cleaning blade is located in the system before brush, and adjacent to brush. The brushes are charged in an opposite polarity to the charge of the toner to be removed from the photoconductor belt.

A system and apparatus that removes and collects non-functional wire assemblies from dicorotron units is described. It has a removal tool mounted on the top of a storage box. The removal tool has an open top and bottom, the open bottom is aligned with an opening in the top of the box to permit a dislodged wire assembly to fall therethrough.

Dicorotron wire assembly removal and storage tool

Electrostatic printing processes utilize corona-charging units. When those units wear out or become faulty, they need to be replaced. This embodiment provides a tool that can be used to remove a faulty electrode wire assembly from the unit. This same tool when loaded with a new wire assembly can insert a new wire assembly into the emptied corona charging unit, sometimes referred to as a dicorotron unit. The tool, therefore, is used both to remove or insert a wire assembly from or into a dicorotron unit.

Dicorotron wire assembly removal-insertion tool

System and methods may calibrate an AC rms voltage applied to a coronode of a charging device to achieve a predefined operating current at a target value of DC shield voltage. The target value of DC shield voltage may be set to be substantially below an over-voltage condition. System and methods may use a calibration routine that may determine a minimum AC voltage required to achieve the target value of DC shield voltage. Systems and methods may alternatively, or additionally, sense current and adjust the applied voltage to obtain a target current.

Calibration apparatus and method for charging unit of image forming device

A plasma sprayed TiOcoating is used to remove effluents produced during an electrical charging step using a corona charging device. The plasma spray allows for the application of TiOceramic to an aluminum dicorotron housing. Plasma spray also increases the electrical conductivity of the TiO(which is necessary for the dicorotron operation). Plasma sprayed coatings are also porous which aids in the capture and reduction of effluents.

Coating for the breakdown of corona effluents

A defect analysis system for a xerographic print engine includes a residual mass sensor that senses the two-dimensional signature structure of residual mass remaining on a photoconductive or other substrate surface after image transfer. Preferably, the sensor is a full width array that spans substantially an entire width of the photoconductive surface. This information is then processed and analyzed to determine a specific type of transfer defect present. This may include the quantified level of defect for each detected type. The defect analysis system may also include a closed-loop control system that can adjust various xerographic process parameters using feedback based on the identification and optionally magnitude of each specific defect type. The identified print quality defect, such as mottle, streaks, point deletions, graininess, etc. can then be used to determine a customized corrective control action to be taken by the feedback control of the xerographic print engine to remedy or compensate for the defect(s).

Full-width array sensing of two-dimensional residual mass structure to enable mitigation of specific defects

Growing community of inventors

Bloomfield, NY, United States of America

Bruce J Parks