Patent application number | Description | Published |
20080218773 | Image scaling for an electrophotographic device to obtain various media output speeds - Methods and apparatus include scaling imaging of an electrophotographic (EP) device, such as a laser printer or copy machine, to obtain various media output speeds (in pages per minute). A scanning unit has a substantially fixed scan rate during printing and reflects a laser beam onto a photoconductor to create a latent image at a first resolution. A media is advanced into contact with the latent image at a predetermined printing process speed to obtain a printed image output of the latent image at a size corresponding to a size (job resolution) of the image input data, but at a resolution different than the resolution of the image data input. A controller alters data used to create the latent image. Techniques for altering resolution include processing relative to a raster image processor to stretch one resolution dimension of the bitmap into a larger resolution dimension. | 09-11-2008 |
20100302553 | Methods and Apparatus for Ascertaining Sensor Signal Delay in an Electrophotographic Device - In an electrophotographic (EP) device, methods and apparatus include determining a delay of one or more sensors (hsync) to accurately know when to start the process of scanning latent images. In one aspect, the sensor includes a leading and trailing edge defined along a direction of laser beam scan travel. Determining the delay includes learning a position of a laser beam on the sensor at a time when a controller connected to the sensor receives a signal from the sensor indicating the sensor is being sufficiently impinged upon by the laser beam. It also includes learning a latest possible position of the laser beam along the direction of laser scan travel where the laser beam can be turned on and still have the sensor assert a signal indicating it has been sufficiently impinged upon by the laser beam. Bi-directionally scanning EP devices are also disclosed, including controllers, photoconductors, sensors, etc. | 12-02-2010 |
20110064447 | OBTAINING PRESSURE OF AN OPERATING ENVIRONMENT OF A BI-DIRECTIONALLY SCANNING ELECTROGRAPHIC DEVICE FOR IMPLEMENTING CORRECTIONS PER PRESSURE - Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to ambient pressure in which operated. A moving galvanometer or oscillator reflects a laser beam to create scan lines of a latent image in opposite directions. A damping of the motion occurs per air density implicated by temperature and pressure, where the pressure changes occurring especially from altitude changes. During use, a drive signal, such as a pulse train, moves the galvanometer or oscillator at or near its resonant frequency. Based on a parameter of the drive signal, such as pulse width, the ambient pressure can be made known. In general, a high-pressure environment requires a relatively longer pulse width to resonate the galvanometer or oscillator in comparison to a shorter pulse width for a low-pressure environment. Corrections to print quality stem from the determined ambient pressure. | 03-17-2011 |
20120250125 | Obtaining Pressure of an Operating Environment of a Bi-directionally Scanning Electrophotographic Device for Implementing Corrections per Pressure - Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to ambient pressure in which operated. A moving galvanometer or oscillator reflects a laser beam to create scan lines of a latent image in opposite directions. A damping of the motion occurs per air density implicated by temperature and pressure, where the pressure changes occurring especially from altitude changes. During use, a drive signal, such as a pulse train, moves the galvanometer or oscillator at or near its resonant frequency. Based on a parameter of the drive signal, such as pulse width, the ambient pressure can be made known. In general, a high-pressure environment requires a relatively longer pulse width to resonate the galvanometer or oscillator in comparison to a shorter pulse width for a low-pressure environment. Corrections to print quality stem from the determined ambient pressure. | 10-04-2012 |
Patent application number | Description | Published |
20080285987 | Electrophotographic Device Utilizing Multiple Laser Sources - An electrophotographic device has first and second laser sources, each controllable to emit a laser beam, a scanning device arranged to direct the beams so as to sweep in a scan direction across a photoconductive surface and a controller configured to control the electrophotographic device. In at least one print mode, the electrophotographic device is controlled such that scan lines written by the first laser beam overlap with scan, lines written by the second laser beam, and a laser power of the first and second laser sources are controlled such that image data corresponding to select print elements are each partially written at a corresponding print element, position along at least two adjacent scan lines so as to combine energy in a manner that forms a synthesized print element on the photoconductive surface at a position between the adjacent scan lines. | 11-20-2008 |
20090066005 | Methods for Determining Widths Of Media Sheets Within An Image Forming Apparatus - The present application is directed to methods of determining a width of a media sheet moving along a media path of an image forming apparatus. The methods may include moving the media sheet along the media path and past a media width sensor that includes a shaft with a first upstream paddle positioned away from a reference location of the media path and a second downstream paddle positioned in closer proximity to the reference location. The first paddle is positioned a first distance from the first sensor, and the second paddle is positioned a second distance from the first sensor. As the media sheet moves along the media path, a first signal may be received when the media sheet contacts the first sensor, and a second signal when the media sheet is at the media width sensor. The distance the media sheet travels between contacting the first sensor and being at the second sensor may be determined. The method may also determine whether the media sheet contacted the first or second paddle based on the media sheet travel distance. Based on which paddle was contacted, it may then be determined whether the media sheet is wide or intermediate. The method may also include determining the media sheet is narrow if there is no receipt of two signals. | 03-12-2009 |
20110116817 | Methods and Apparatuses for Applying Respective EP Engine Settings to Different Zones within a Page of Media - Generally, an imaging device is capable of applying respective EP engine settings to different zones within a page of media. In an example embodiment, a method includes printing in first and second zones on a page of media using first and second EP engine settings that are respectively associated with the first and second zones. The imaging device prints in the first zone on the page of media based on a first EP engine setting that is associated with the first zone. The imaging device switches from the first zone on the page of media to the second zone on the page of media responsive to a size indicator. The imaging device prints in the second zone on the page of media based on a second EP engine setting that is associated with the second zone. | 05-19-2011 |
20120269529 | Zero Leading and Trailing Margin Printing Method and an Electrophotographic Imaging Apparatus for Performing Same - An electrophotographic imaging apparatus includes a feeding tray to feed a media sheet along a feed path in a process direction; a media sensor disposed on the feed path and triggered or changes state when a leading edge and a trailing edge of the media sheet arrives at the media sensor; an image carrying member adjacent to the media sensor and carrying a toner image thereon, and an transfer roll abuttingly coupled with the image carrying member to facilitate the transfer of the toner image from the image carrying member onto the media sheet. The electrophotographic imaging apparatus includes a controller for adjusting the setting of transfer roll voltage values based on the location of an image area on the media sheet. Further disclosed is a method for reproducing an original image on the media sheet using variable timing of transfer voltages. | 10-25-2012 |
20140093263 | System and Method for Controlling Multiple Light Sources of a Laser Scanning System in an Imaging Apparatus - An imaging device having a printhead unit which includes a plurality of independently controllable light sources, each light source generating a light beam when activated; a photoconductive surface operable at a plurality of image transfer rates; a scanning device having one or more deflecting surfaces, the scanning device arranged to direct the light beams so as to sweep in at least one scan direction across a surface such that, for each sweep, scan lines written by the light beams are spaced from one another on the photoconductive surface in a process direction that is nominally orthogonal to the scan direction; and a controller configured to selectively activate any number of the light sources for use during a print operation to write image data along scan lines on the photoconductive surface, wherein a rotational velocity of the scanning device is selected and the number of the light sources activated based upon at least one selected operating parameter for the imaging device. | 04-03-2014 |
20140105628 | Method and System for Controlling a Fuser Assembly - A method and apparatus for providing a relatively short period of time for a fuser assembly to be ready to perform a fusing operation. Included is a fusing assembly having a heat transfer member and a backup member positioned to engage the heat transfer member so as to define a fusing nip therewith; and a controller coupled to the fuser assembly, wherein during a period of time when the fuser assembly is not performing a fusing operation, the controller activates the heat transfer member while causing the backup member to rotate at one or more relatively slow speeds relative to a fusing speed of the fuser assembly. | 04-17-2014 |
Patent application number | Description | Published |
20110284452 | Filtration System and Method - Embodiments of the invention provide a filtration system comprising a filter tank. In some embodiments, at least portions of an inlet pipe and an outlet manifold can be positioned within the filter tank. At least one manifold assembly can be coupled to the outlet manifold and also can be positioned within the filter tank. In some embodiments, the manifold assembly can include at least one first aperture, at least one second aperture, and at least one first cavity positioned within the manifold assembly. In some embodiments, the second aperture can fluidly connect the first cavity and the outlet manifold. Also, at least one filter can be coupled to the manifold assembly so that the first aperture fluidly connects the filter to the first cavity. | 11-24-2011 |
20130020248 | Toroidal Filter Vessel System - Embodiments of the invention provide a filter vessel including a housing with an inlet and an outlet, a toroidal-shaped inlet manifold, and a plurality of inlet channels. The toroidal-shaped inlet manifold is in fluid communication with the inlet and is positioned along a circumference of the housing, and the plurality of inlet channels are in fluid communication with the toroidal-shaped inlet manifold. | 01-24-2013 |
20140353237 | FILTRATION SYSTEM AND METHOD - Embodiments of the invention provide a filtration system comprising a filter tank. In some embodiments, at least portions of an inlet pipe and an outlet manifold can be positioned within the filter tank. At least one manifold assembly can be coupled to the outlet manifold and also can be positioned within the filter tank. In some embodiments, the manifold assembly can include at least one first aperture, at least one second aperture, and at least one first cavity positioned within the manifold assembly. In some embodiments, the second aperture can fluidly connect the first cavity and the outlet manifold. Also, at least one filter can be coupled to the manifold assembly so that the first aperture fluidly connects the filter to the first cavity. | 12-04-2014 |
Patent application number | Description | Published |
20100149506 | Actuator System, Lithographic Apparatus, Method of Controlling the Position of a Component and Device Manufacturing Method - An actuator system is provided that is configured to move a component relative to a base of the actuator system. The actuator system may include first and second actuating elements, each including two sections of material that are joined to each other and have different coefficients of thermal expansion. The two actuating elements may be configured such that if the temperature of one is increased it applies a force on the component in a direction that is opposite to the force applied by the other actuating element if its temperature is increased. The actuator system may further include at least one power supply configured to provide independently controllable heating to the first and second actuating elements. | 06-17-2010 |
20110310369 | LITHOGRAPHIC METHOD AND APPARATUS - A lithographic method for irradiating resist on a substrate, the resist filling a region located between a first element located on the substrate, and a second element located on the substrate, the first element having a first length, a first width, and a first height, the second element having a second length, a second width, and a second height, the first height being substantially equal to the second height, the first length being substantially parallel to the second length, and extending in a first direction, a distance between facing sidewalls of the first element and the second element that defines the region filled with resist being less than a wavelength of radiation used to irradiate the resist, the method including irradiating the resist with elliptically polarized radiation, the elliptically polarized radiation being configured such that, at the first height and second height, the elliptically polarized radiation is polarized perpendicular to the first direction, substantially perpendicular to the first and second lengths. | 12-22-2011 |
20120262690 | ILLUMINATION SYSTEM, LITHOGRAPHIC APPARATUS AND ILLUMINATION METHOD - An illumination system includes a field-facet mirror-device and a pupil mirror configured to condition a beam of radiation incident on the field-facet mirror-device. The field-facet mirror-device includes reflective field facets movable between first and second orientations relative to the incident beam. The field facets in their first orientations are effective to reflect the incident radiation towards respective reflective pupil facets so as to form part of a conditioned beam reflected from the pupil-facet mirror-device. The field facets in their second orientations are effective to reflect the incident radiation onto respective areas of the pupil-facet mirror-device designated as beam dump areas. The areas are arranged to prevent radiation incident on the areas from forming part of the conditioned beam and are arranged between the limits of an annular area on the pupil-facet mirror-device effective to define the inner and outer regions of the conditioned beam reflected from the pupil-facet mirror-device. | 10-18-2012 |
20140071420 | LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD - A lithographic projection apparatus is disclosed for use with an immersion liquid positioned between the projection system and a substrate. Several methods and mechanism are disclosed to protect components of the projection system, substrate table and a liquid confinement system. These include providing a protective coating on a final element of the projection system as well as providing one or more sacrificial bodies upstream of the components. A two component final optical element of CaF | 03-13-2014 |
20140347642 | LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD - A lithographic projection apparatus is disclosed for use with an immersion liquid positioned between the projection system and a substrate, Several methods and mechanism are disclosed to protect components of the projection system, substrate table and a liquid confinement system. These include providing a protective coating on a final element of the projection system as well as providing one or more sacrificial bodies upstream of the components. A two component final optical element of CaF | 11-27-2014 |