Xerox Corporation

David Kenneth Ahl

Robert Arnold Gross

Michael Nicholas Soures

Douglas A McKeown

David Sekovski

Roger Gaylord Leighton

Paul Allen Hosier

Varun Sambhy

James Edward Williams

Scott J Phillips

John Robert Uchal

David Peter Lomenzo

Michael W Schab

John Chinnici

Alfred J Claflin

Evan P Kastner

A coating for an ink jet printhead front face, wherein the coating comprises a low adhesion coating, wherein when the low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a low sliding angle with the printhead front face surface, wherein the low sliding angle is less than about 1&#xb0; to less than about 30&#xb0;. In embodiments, the low adhesion coating is an oleophobic coating that exhibits a contact angle of greater than about 35&#xb0; with ultra-violet gel ink or solid ink. The coating can further be used for an ink jet printhead flexure chute.

Coating for an ink jet printhead front face

In an inkjet printing apparatus, a heater heats a drip bib that is located below a plurality of inkjets in a printhead to a temperature that melts ink collected on a surface of the drip bib. Pressurized air is directed toward the surface of the drip bib to remove the melted ink from the surface of the drip bib.

Apparatus and method for removal of ink from an exterior of a printhead

A method and apparatus for corotron cleaning management in an image production device is disclosed. The method may include receiving an input from the corotron cleaning counter, determining if the corotron cleaning counter exceeds a predetermined threshold, wherein if it is determined that the corotron cleaning counter exceeds the predetermined threshold, notifying a maintainer that the corotron requires cleaning, determining if corotron cleaning has been performed, wherein if it is determined that corotron cleaning has been performed, resetting the corotron cleaning counter.

Method and apparatus for corotron cleaning management in an image production device

An improved detack corotron reduces the likelihood of a paper jam arising from a curled paper edge getting caught in the corotron. The detack corotron includes an electrically conductive coronode having a plurality of field emitters, each field emitter having a terminating end, the terminating ends of the field emitters being spatially separated from one another, and a paper edge guide having a plurality of generally planar members, the generally planar members being perpendicular to the conductive coronode and the generally planar members having a height that extends above the terminating ends of the field emitters.

Paper jam-resistant detack corotron for use in an electrostatographic imaging apparatus

In a printing machine having at least one transfer device driven in response to an electrical signal and operable to transfer a medium onto a sheet, a method controls the magnitude of the electrical signal driving the transfer device. The method includes assigning a magnitude of the electrical signal for driving the transfer device to each of at least two transfer stress levels, evaluating only operating parameters of the printing machine that have a pre-determined priority value relative to a corresponding pre-determined threshold value, selecting one of the at least two transfer stress levels based on the evaluation of the at least one operating parameter, and applying the magnitude of the electrical signal corresponding to the selected stress level to the electrically-driven transfer device.

Method for adjusting transfer current in an image transfer machine

In a printing machine having at least one transfer device driven in response to an electrical signal and operable to transfer a medium onto a sheet, a method of controlling the magnitude of the electrical signal driving the transfer device comprises assigning a magnitude of the electrical signal for driving the transfer device to each of at least two transfer stress conditions, evaluating at least one operating parameter of the printing machine relative to a corresponding pre-determined threshold value, selecting one of the at least two transfer stress conditions based on the evaluation of the at least one operating parameter, and applying the magnitude of the electrical signal corresponding to the selected stress condition to the electrically-driven transfer device. The operating parameters may include environmental parameters, such as altitude and humidity, sheet properties, such as paper weight, and machine parameters, such as transfer device life.

System and method for adjusting transfer current in an image transfer machine

An apparatus is provided for reducing transfer deletions in an electrostatographic machine. The apparatus includes a registration controller for driving a print substrate at a registration velocity and feeding the print substrate to an image-retentive member. The apparatus also includes a system controller operably associated with the registration mechanism controller. The system controller monitors at least one operating parameter of an image forming apparatus and generates a control signal in response to the monitored operating parameter(s). The registration controller is responsive to the control signal and is configured to adjust the registration velocity in accordance with the control signal as the image-retentive member is driven at a preselected velocity. The apparatus further includes a transfer assist mechanism movably mounted adjacent a photoreceptive member so the transfer assist mechanism may be moved from a non-operative position to an operative position to provide substantially uniform contact between the print substrate and the image-retentive member.

Systems and methods for reducing transfer deletions in an electrostatographic printer

An apparatus for assisting in the transfer of an image from an image bearing member onto a copy substrate, comprises an image bearing member carrying an image to be transferred, a feed mechanism for feeding a copy substrate to the image bearing member, and a transfer assist mechanism movable to an activated position bearing on the substrate to maintain the substrate in contact with the image bearing member to assist in transferring the image thereto, and to a de-activated position. A sensor generates a signal in response to passage of the leading edge and the trailing edge of the substrate to ascertain an actual length of the substrate as it moves to the image bearing member. A controller is operable to direct the transfer assist mechanism to move to the activated position and then to direct the transfer assist mechanism to move to the de-activated position after a de-activation dwell time. The de-activation dwell time is at least initially a nominal dwell time based on an expected length of the substrate from its leading edge to its trailing edge. The controller is operable to change the de-activation dwell time from the nominal dwell time in response to the determination of the actual length of the substrate.

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Rochester, NY, United States of America

David Kenneth Ahl