Xerox Corporation

Michael Jon Levy

Paul J McConville

Seemit Praharaj

Jason Mathew LeFevre

Douglas K Herrmann

Chu-Heng Liu

Linn C Hoover

David A VanKouwenberg

John Stephen Facci

Richard B Lewis

Jason Matthew LeFevre

Joseph C Sheflin

Howard A Mizes

David Allen Mantell

Joseph C Mammino

Timothy J Fuller

Roger Gaylord Leighton

Martin A Abkowitz

Jeffrey J Folkins

Samuel Kaplan

Milan Stolka

James M Markovics

Rachael L McGrath

David Alan Vankouwenberg

Guerino G Sacripante

Beng S Ong

Anthony Salvatore Condello

Stuart Alan Schweid

David Joseph Gervasi

James R Larson

Michael F Zona

Christopher R Snelling

Thomas W Smith

Dale Robert Mashtare

Michael F Leo

Michael C Mongeon

Charles Donahue Rizzolo

Alexander J Fioravanti

Thomas Jay Wyble

William M Prest, Jr

Edward B Caruthers, Jr

James Padula

John T Newell

Michael J Severn

Joseph D Geiser

Santokh Singh Badesha

Stephan V Drappel

Gary Allen Denton

Mark Anthony Cellura

James Edward Williams

James J Spence

Richard F Bergen

Robert Alan Clark

Ronald F Ziolo

Christopher Douglas Atwood

Ali Rafic Dergham

David J Luca

Donald M Bott

Paul S Bonino

David S Derleth

Kathleen M McGrane

Scott J Phillips

James Michael Chappell

Elliott A Eklund

James M Casella

Ralph A Mosher

Paul Windsor Morehouse, Jr

Richard Alan Campbell

Glenn David Batchelor

John Paul Meyers

Vincent M Williams

Christian O Abreu

Michael M Shahin

Christopher M Mieney

Ronald J Weagley

Mojgan Rabbani

Michael S Smith

Roger A Newell

Senthil Sivaraman

Jeremy Christopher deJong

Joseph D LaRussa

Jim Casella

Mojgan Rabbini

A method and system of improving frequency responses at lower frequencies from a loudspeaker includes simultaneously tuning a transmission line and a tuned port in the same system. The transmission line and the tuned ports are tuned to innate characteristics of the physical and electrical components within the loudspeaker. In one embodiment, an improved frequency response of a loudspeaker is achieved by tuning the transmission line to the frequency of the maximum excursion point of the loudspeakers. In another embodiment the transmission line is tuned to the resonance frequency of the loudspeaker having the tuned port.

Loudspeaker

A marker transport system and a method of operating the marker transport system. A group of print bars is located with respect to a marker transport platen and a marker transport belt. A vacuum source and a pneumatic solenoid block are associated with the marker transport platen. The marker transport platen includes airflow sections divided into process-direction slots and cross-section direction slots. The cross-section direction slots are located beneath the print bars and are connected to the vacuum source via the pneumatic solenoid block, which facilitates an individual control of each of the cross-process direction slots. Pneumatic valves are associated with the pneumatic solenoid block, which supplies a flow of vacuum to the cross-process direction vacuum slots. The pneumatic vales can be timed to allow the vacuum to be present when a sheet is present over a corresponding vacuum slot among the process-direction slots and the cross-section direction slots.

Active airflow control device for vacuum paper transport

According to aspects of the embodiments, there is provided a method of measuring the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is measured using a glass roll at a lower temperature than the fountain solution. The lower temperature causes the fountain solution to undergo a change in state and in a solid state the fountain solution crystalizes and changes roll opacity with the thickness of the film. When radiated with a light source the opacity is continuously measured through the surface of the roller. The thickness of the crystallized fountain solution can then be determined via the opacity level increase by the crystallization and the impact to the opacity on the glass roll.

Fountain solution thickness measurement using optical properties of solidified fountain solution in a lithography printing system

An apparatus and method for embossing a substrate are disclosed. For example, the apparatus includes an embossing platform, a printhead to dispense ink on the embossing platform in a desired raised pattern on the embossing platform, a press to apply a load against a substrate placed on the desired raised pattern and the embossing platform to emboss the desired raised pattern onto the substrate, and an ink removal device to remove the ink that is dispensed on the embossing platform in the desired raised pattern.

Method and apparatus for embossing a substrate

A purge cycle is performed with an ink delivery system of an inkjet printer by applying a pressure pulse to a printhead in the printer that is substantially shorter than pressure pulses previously used. A pressure at a predetermined threshold is generated behind a valve and then release to the printhead. The duration of the pressure application is in a range of about 150 milliseconds to about 250 milliseconds. This pressure pulse substantially reduces the amount of ink emitted during the purge. A bidirectional wipe of the printhead face is effective for restoring inkjets in the printhead even though the amount of emitted ink is substantially reduced.

System and method for efficiently purging printheads

A vacuum roller system and a method of operation the vacuum roller system can include an assembly of interdigitated rollers, and a vacuum system, wherein the assembly of interdigitated rollers is operably connected to the vacuum system to move sheets of media through a downstream dryer in a printer, wherein a vacuum is drawn between individual rollers among the assembly of interdigitated rollers so that the vacuum is distributed across a sheet of media and is split around the individual rollers. The spacing between the individual rollers among the assembly of interdigitated rollers is variable to vary the vacuum.

Interdigitated vacuum roll system for a cut sheet printer dryer transport

An inkjet printer includes a dryer configured to attenuate the effects of temperature differentials arising in substrates that are caused by holes in a media transport belt and a platen covering a vacuum plenum. The dryer includes a heater, a media transport belt cooler, and a media transport belt. The media transport belt is configured to move substrates past the heater after ink images have been formed on the substrates and the media transport belt cooler is positioned to remove heat energy from the media transport belt after the media transport belt has passed the heater and the substrates have separated from the media transport belt. The substrate cooler is configured to reduce a temperature of the media transport belt to a temperature that attenuates image defects arising from temperature differentials in the media transport belt when the media transport belt is opposite the heater.

Media transport belt that attenuates thermal artifacts in images on substrates printed by aqueous ink printers

An indicator tag and a method for fabricating the same are disclosed. For example, the indicator tag includes a three-dimensional mesh comprising a plurality of pores, wherein the three-dimensional mesh is printed with a water soluble and ultra-violet (UV) light curable ink, a container enclosing the three-dimensional mesh, a membrane coupled to the three-dimensional mesh, and a dye dispensed on top of the membrane, wherein the three-dimensional mesh interacts with the dye when in contact with the dye to provide an indication.

Indicator tags that exhibit color transition

A print system and a method for detecting and correcting underperforming LEDs in-line of a 3D object printer are disclosed. For example, the print system includes a plurality of printheads arranged in a two-dimensional array, a curing light source, an inline detection and correction (IDC) system, a movable member to hold an object and a test plate and a controller to control movement of the movable member to move the object and the test plate past the array of printheads, to operate the plurality of printheads to eject a marking material onto the object as the object passes the two-dimensional array of printheads, to operate the curing light source apply energy to the test plate and to cure the marking material, and to operate the IDC system to read the test plate to confirm that the curing light source is operating correctly based on a reading of the test plate.

In-line detection and correction of underperforming light emitting diodes in a curing station of a three dimensional object printer

A print system and a method for curing marking material on an object using an active transparent display in a three dimensional (3D) object printer are disclosed. For example, the print system includes a plurality of printheads, a curing light source, a movable member to hold an object, an active transparent display and a controller to control movement of the movable member to move the object past the array of printheads, to operate the plurality of printheads to eject the marking material onto the object as the object passes the two-dimensional array of printheads, to control movement of the movable member, to control the active transparent display and to operate the curing light source to apply energy to cure the marking material, wherein the amount of energy that is applied to the object is controlled by a mask that is displayed on the active transparent display.

Active transparent display for dynamic masking during UV curing in a three dimensional object printer

An inkjet printer includes a dryer configured to attenuate the effects of temperature differentials arising in substrates that are caused by holes in a media transport belt and a platen covering a vacuum plenum. The dryer includes a platen, a heater configured to direct heat toward the platen, at least one media transport belt configured to slide over the platen to move the substrates past the heater after the ink images have been formed on the substrates, and at least one belt diversion component configured to divert the at least one media belt from a straight-line path over the platen.

Media transport through a dryer that attenuates thermal artifacts in images on substrates printed by aqueous ink printers

A vacuum roller system and a method of operating the vacuum roller system can include a group of vacuum rollers operable to move a sheet of media through a dryer. The vacuum rollers do not require a vacuum to be drawn between the vacuum rollers. Each vacuum roller can include a plenum operable to direct the vacuum to a top portion of the vacuum roller to drive the sheet of media from one roller to the next roller. The plenum can engage vacuum holes in a rotating vacuum roller when the vacuum holes in the vacuum roller are aligned with the plenum.

Inner plenum vacuum roller system for a cut sheet printer dryer transport

A system for cleaning and treating a printhead includes (a) a movable carriage having affixed to a base of the movable carriage a cleaning blade and an absorptive pad, (b) a low vapor pressure organic solvent, the low vapor pressure organic solvent is deliverable to the absorptive pad via a pump, the low vapor pressure organic solvent has a vapor pressure lower than water and (c) a carriage moving mechanism that moves the carriage so that the cleaning blade and the absorptive pad pass over the printhead.

System and method for cleaning a printhead

A marker transport system and a method of operating the marker transport system can include one or more print heads and a marker transport platen upon which a sheet of media moves. The transport platen can include airflow sections comprising process-direction slots. The plates can move in a cross-process direction, and can control airflow in an area under the print heads. The one or more plates in a first position can allow for airflow when the sheet of media is located at the first position and in a second position can block the airflow at the second position. A vacuum can be provided under the sheet of media as the sheet of media traverses a print path across the marker transport platen. A no-vacuum inter-document zone can be provided, which moves along with the sheet of media under the one or more print heads.

A directionality detector is configured for use in an inkjet printer to attenuate the effects of ink drying in the nozzles of a printhead during printing operations. The directionality detector includes an optical sensor that generates image data of a test pattern formed on media by the printer, a diffuser that emits humidified air toward the media before the media is printed, and a controller operatively connected to the optical sensor and diffuser. The controller is configured compare the image data of the test pattern to stored image data of the test pattern printed at a previous time and determine whether any difference between the two images is greater than a predetermined threshold. The controller then operates the diffuser to direct humidified air toward the media passing the diffuser using the differences between the stored image data of the test pattern and the image data of the test pattern.

System and method to detect ink drop directionality degradation and perform remedial measures to prevent failing inkjets in printheads

Growing community of inventors

Webster, NY, United States of America

Michael Jon Levy