Patents by Inventor Christopher Dane Jones
Christopher Dane Jones has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10274724Abstract: A collimation assembly includes a body, at least four light sources, and at least four collimation lenses. The body has inner surfaces that define at least four hollow portions extending through the body between opposed first and second sides thereof, each hollow portion having opposed first and second openings at the first and second sides of the body, respectively. Each light source is disposed at the first opening of one of the at least four hollow portions and controllable to emit a light beam therethrough. Each collimation lens is disposed at the second opening of one of the at least four hollow portions to receive the light beam emitted by the light source disposed at the first opening and diverge the light beam as the light beam passes through the collimation lens. The at least four light sources and the at least four collimation lenses are supported by the body.Type: GrantFiled: December 13, 2016Date of Patent: April 30, 2019Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Fei Chen, Randall Lee Hudson, Christopher Dane Jones, Jason Lee Rowe
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Patent number: 9874745Abstract: A collimation assembly includes a body, at least four light sources, and at least four collimation lenses. The body has inner surfaces that define at least four hollow portions extending through the body between opposed first and second sides thereof, each hollow portion having opposed first and second openings at the first and second sides of the body, respectively. Each light source is disposed at the first opening of one of the at least four hollow portions and controllable to emit a light beam therethrough. Each collimation lens is disposed at the second opening of one of the at least four hollow portions to receive the light beam emitted by the light source disposed at the first opening and diverge the light beam as the light beam passes through the collimation lens. The at least four light sources and the at least four collimation lenses are supported by the body.Type: GrantFiled: December 13, 2016Date of Patent: January 23, 2018Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Fei Chen, Randall Lee Hudson, Christopher Dane Jones, Jason Lee Rowe
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Patent number: 9800756Abstract: An image forming device includes a controller and a laser scanning unit. The laser scanning unit includes a light source for generating a laser beam for discharging a photoconductive member to create an electrostatic latent image. A first memory is housed on the laser scanning unit and stores data unique to the laser scanning unit and laser beam as characterized during production. A second memory in communication with the controller, and separate from the first memory, stores data characterizing a family of similar laser scanning units of a same type. The controller is configured to read both the first and second memories to generate data to compensate for energy variations along a scan path of the laser beam on the photoconductive member during use. The data substantially reduces energy variation from one scan path to a next.Type: GrantFiled: March 1, 2017Date of Patent: October 24, 2017Inventors: Fei Chen, Christopher Dane Jones, John Lemaster
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Publication number: 20170192373Abstract: An image forming device includes a controller and a laser scanning unit. The laser scanning unit includes a light source for generating a laser beam for discharging a photoconductive member to create an electrostatic latent image. A first memory is housed on the laser scanning unit and stores data unique to the laser scanning unit and laser beam as characterized during production. A second memory in communication with the controller, and separate from the first memory, stores data characterizing a family of similar laser scanning units of a same type. The controller is configured to read both the first and second memories to generate data to compensate for energy variations along a scan path of the laser beam on the photoconductive member during use. The data substantially reduces energy variation from one scan path to a next.Type: ApplicationFiled: March 1, 2017Publication date: July 6, 2017Inventors: FEI CHEN, CHRISTOPHER DANE JONES, JOHN LEMASTER
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Publication number: 20170195521Abstract: A laser scanning unit for an image forming device includes a light source for emitting a laser beam, a scanning member having at least one reflective surface for scanning the laser beam onto an imaging surface across a plurality of scan lines, and driver circuitry for driving the light source to emit the laser beam. The driver circuitry has a first input for receiving a first signal indicating image information and a second input for receiving a second signal indicating shading information. The driver circuitry modulates the laser beam based on the first signal to form an image on the imaging surface corresponding to the image information and adjusts an output power of the modulated laser beam based on the second signal to substantially reduce energy variation across each scan line.Type: ApplicationFiled: December 30, 2015Publication date: July 6, 2017Inventors: Fei Chen, Christopher Dane Jones, John Lemaster
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Patent number: 9699352Abstract: A laser scanning unit for an image forming device includes a light source for emitting a laser beam, a scanning member having at least one reflective surface for scanning the laser beam onto an imaging surface across a plurality of scan lines, and driver circuitry for driving the light source to emit the laser beam. The driver circuitry has a first input for receiving a first signal indicating image information and a second input for receiving a second signal indicating shading information. The driver circuitry modulates the laser beam based on the first signal to form an image on the imaging surface corresponding to the image information and adjusts an output power of the modulated laser beam based on the second signal to substantially reduce energy variation across each scan line.Type: GrantFiled: December 30, 2015Date of Patent: July 4, 2017Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Fei Chen, Christopher Dane Jones, John Lemaster
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Patent number: 9664901Abstract: A collimation assembly includes a body, at least four light sources, and at least four collimation lenses. The body has inner surfaces that define at least four hollow portions extending through the body between opposed first and second sides thereof, each hollow portion having opposed first and second openings at the first and second sides of the body, respectively. Each light source is disposed at the first opening of one of the at least four hollow portions and controllable to emit a light beam therethrough. Each collimation lens is disposed at the second opening of one of the at least four hollow portions to receive the light beam emitted by the light source disposed at the first opening and diverge the light beam as the light beam passes through the collimation lens. The at least four light sources and the at least four collimation lenses are supported by the body.Type: GrantFiled: September 29, 2015Date of Patent: May 30, 2017Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Fei Chen, Randall Lee Hudson, Christopher Dane Jones, Jason Lee Rowe
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Publication number: 20170090190Abstract: A collimation assembly includes a body, at least four light sources, and at least four collimation lenses. The body has inner surfaces that define at least four hollow portions extending through the body between opposed first and second sides thereof, each hollow portion having opposed first and second openings at the first and second sides of the body, respectively. Each light source is disposed at the first opening of one of the at least four hollow portions and controllable to emit a light beam therethrough. Each collimation lens is disposed at the second opening of one of the at least four hollow portions to receive the light beam emitted by the light source disposed at the first opening and diverge the light beam as the light beam passes through the collimation lens. The at least four light sources and the at least four collimation lenses are supported by the body.Type: ApplicationFiled: December 13, 2016Publication date: March 30, 2017Inventors: Fei Chen, Randall Lee Hudson, Christopher Dane Jones, Jason Lee Rowe
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Publication number: 20170090189Abstract: A collimation assembly includes a body, at least four light sources, and at least four collimation lenses. The body has inner surfaces that define at least four hollow portions extending through the body between opposed first and second sides thereof, each hollow portion having opposed first and second openings at the first and second sides of the body, respectively. Each light source is disposed at the first opening of one of the at least four hollow portions and controllable to emit a light beam therethrough. Each collimation lens is disposed at the second opening of one of the at least four hollow portions to receive the light beam emitted by the light source disposed at the first opening and diverge the light beam as the light beam passes through the collimation lens. The at least four light sources and the at least four collimation lenses are supported by the body.Type: ApplicationFiled: December 13, 2016Publication date: March 30, 2017Inventors: Fei Chen, Randall Lee Hudson, Christopher Dane Jones, Jason Lee Rowe
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Publication number: 20170090188Abstract: A collimation assembly includes a body, at least four light sources, and at least four collimation lenses. The body has inner surfaces that define at least four hollow portions extending through the body between opposed first and second sides thereof, each hollow portion having opposed first and second openings at the first and second sides of the body, respectively. Each light source is disposed at the first opening of one of the at least four hollow portions and controllable to emit a light beam therethrough. Each collimation lens is disposed at the second opening of one of the at least four hollow portions to receive the light beam emitted by the light source disposed at the first opening and diverge the light beam as the light beam passes through the collimation lens. The at least four light sources and the at to least four collimation lenses are supported by the body.Type: ApplicationFiled: September 29, 2015Publication date: March 30, 2017Inventors: Fei Chen, Randall Lee Hudson, Christopher Dane Jones, Jason Lee Rowe
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Patent number: 9052513Abstract: A system and method for reducing scan line jitter caused by facet cut variation in scan systems employing a plurality of laser sources and a sensor for generating the timing for the laser sources. The system includes a controller for determining a unique time delay for each facet of the rotating mirror, and controlling the laser sources so that video provided by each laser source is delayed in a scan line by the unique time delay corresponding to the facet of the rotating mirror used in creating the scan line.Type: GrantFiled: May 4, 2012Date of Patent: June 9, 2015Assignee: Lexmark International, Inc.Inventors: Fei Chen, Craig Eric Hadady, Christopher Dane Jones, Simarpreet Singh Rattan
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Patent number: 8963976Abstract: The invention describes a method and system for correcting linearity error of an electrophotographic device with a reduced number of lenses. The method and system insert additional time-slices in the data being processed by the electrophotographic device. The additional time-slices are inserted in the data in a predefined order based on a plurality of random numbers. The insertion of additional time-slices corrects the linearity error of the electrophotographic device.Type: GrantFiled: September 12, 2011Date of Patent: February 24, 2015Assignee: Lexmark International, Inc.Inventors: Craig Eric Hadady, Christopher Dane Jones, John Lemaster
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Patent number: 8817058Abstract: A system and method for reducing scan line jitter in laser scan systems employing a rotating mirror, including a controller for determining a unique time delay for each mirror facet and controlling laser sources so that video provided by each laser source is delayed in a scan line by the unique time delay corresponding to the mirror facet used in creating the scan line. The controller computes a facet map signature vector corresponding to each mirror facet matches the signature to a previously stored signature and assigns measured distance offset data to the mirror facets based upon the matching.Type: GrantFiled: May 4, 2012Date of Patent: August 26, 2014Assignee: Lexmark International, Inc.Inventors: Fei Chen, Craig Eric Hadady, Christopher Dane Jones, John Lemaster
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Publication number: 20130121713Abstract: A system and method for reducing scan line jitter caused by facet cut variation in scan systems employing a plurality of laser sources and a sensor for generating the timing for the laser sources. The system includes a controller for determining a unique time delay for each facet of the rotating mirror, and controlling the laser sources so that video provided by each laser source is delayed in a scan line by the unique time delay corresponding to the facet of the rotating mirror used in creating the scan line.Type: ApplicationFiled: May 4, 2012Publication date: May 16, 2013Inventors: Fei Chen, Craig Eric Hadady, Christopher Dane Jones, Simarpreet Singh Rattan
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Publication number: 20120281996Abstract: A system and method for reducing scan line jitter in laser scan systems employing a rotating mirror, including a controller for determining a unique time delay for each mirror facet and controlling laser sources so that video provided by each laser source is delayed in a scan line by the unique time delay corresponding to the mirror facet used in creating the scan line. The controller computes a facet map signature vector corresponding to each mirror facet matches the signature to a previously stored signature and assigns distance offset data to the mirror facets based upon the matching.Type: ApplicationFiled: May 4, 2012Publication date: November 8, 2012Inventors: Fei Chen, Craig Eric Hadady, Christopher Dane Jones, John Lemaster
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Publication number: 20120002986Abstract: The invention describes a method and system for correcting linearity error of an electrophotographic device with a reduced number of lenses. The method and system insert additional time-slices in the data being processed by the electrophotographic device. The additional time-slices are inserted in the data in a predefined order based on a plurality of random numbers. The insertion of additional time-slices corrects the linearity error of the electrophotographic device.Type: ApplicationFiled: September 12, 2011Publication date: January 5, 2012Inventors: Craig Eric Hadady, Christopher Dane Jones, John Lemaster
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Patent number: 8018479Abstract: The invention describes a method and system for correcting linearity error of an electrophotographic device with a reduced number of lenses. The method and system insert additional time-slices in the data being processed by the electrophotographic device. The additional time-slices are inserted in the data in a predefined order based on a plurality of random numbers. The insertion of additional time-slices corrects the linearity error of the electrophotographic device.Type: GrantFiled: August 27, 2008Date of Patent: September 13, 2011Assignee: Lexmark International, Inc.Inventors: Craig Eric Hadady, Christopher Dane Jones, John Lemaster
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Publication number: 20100053298Abstract: The invention describes a method and system for correcting linearity error of an electrophotographic device with a reduced number of lenses. The method and system insert additional time-slices in the data being processed by the electrophotographic device. The additional time-slices are inserted in the data in a predefined order based on a plurality of random numbers. The insertion of additional time-slices corrects the linearity error of the electrophotographic device.Type: ApplicationFiled: August 27, 2008Publication date: March 4, 2010Inventors: Craig Eric Hadady, Christopher Dane Jones, John Lemaster
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Patent number: 6601941Abstract: A method of controlling a temperature of a print chip of a printhead in an ink jet printer includes providing a memory device within the printer. Ink is emitted from the printhead. Temperature data associated with the print chip during the emitting step is recorded. A thermal resistance value associated with the printhead and/or a thermal capacitance value associated with the printhead is calculated. The calculating is dependent upon the recorded temperature data. The thermal resistance value associated with the printhead and/or the thermal capacitance value associated with the printhead is stored in the memory device. A temperature of the print chip at a future point in time is estimated based upon a number of ink drops to be emitted by the printhead before the future point in time, and the thermal resistance value associated with the printhead and/or the thermal capacitance value associated with the printhead.Type: GrantFiled: July 14, 2000Date of Patent: August 5, 2003Inventors: Christopher Dane Jones, Bryan Scott Willett, Shirish Padmaker Mulay
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Patent number: 6299273Abstract: A method of controlling a temperature of a print chip of a printhead in an ink jet printer includes providing the printer with a memory device. The print chip is provided with and at least one ink-jetting resistor. The printhead is provided with at least one substrate heater and a heatsink attached to the print chip. Power is applied to the substrate heater and/or the ink-jetting resistor. Temperature data associated with the print chip is recorded during the applying step. A thermal resistance value of the print chip to the heatsink and/or a thermal capacitance value associated with the printhead is calculated dependent upon the recorded temperature data. The thermal resistance value of the print chip to the heatsink and/or the thermal capacitance value associated with the printhead are stored in the memory device.Type: GrantFiled: July 14, 2000Date of Patent: October 9, 2001Assignee: Lexmark International, Inc.Inventors: Frank Edward Anderson, Stanley Dyer, Christopher Dane Jones, Shirish Padmaker Mulay, William Shannon Spencer