Patents Assigned to Lexmark International, Inc.
  • Patent number: 10542172
    Abstract: A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: January 21, 2020
    Assignee: Lexmark International, Inc.
    Inventors: Nathan Wayne Foley, Timothy John Rademacher, Jennifer Topmiller Williams, Gregory Scott Woods, Christopher Alan Adkins
  • Patent number: 10527969
    Abstract: A method of operating an electrophotographic image forming device according to one example embodiment includes, by rotating a motor in a first rotational direction of the motor, rotating an input gear of a toner container in a first rotational direction of the input gear causing a toner agitator in a toner reservoir of the toner container to move for agitating toner in the toner reservoir. By rotating the motor in a second rotational direction of the motor, the input gear of the toner container rotates in a second rotational direction of the input gear causing an encoded member on the toner container to move. A sensor in the electrophotographic image forming device senses identifying information of the toner container encoded on the encoded member during movement of the encoded member and rotation of the input gear of the toner container in the second rotational direction of the input gear.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: January 7, 2020
    Assignee: Lexmark International, Inc.
    Inventors: Randal Scott Williamson, Virgil Johnson, Jr.
  • Patent number: 10530959
    Abstract: A toner container installable in an image forming device having a controller according to one example embodiment includes a housing having a reservoir for storing toner. A chip is positioned on the housing and configured to receive a first write command from the controller of the image forming device. The chip is further configured to determine whether a transmission cycle bit of the first write command matches a transmission cycle bit of a second write command received by the chip from the controller of the image forming device previous to the first write command. The chip is further configured to resend to the controller of the image forming device a response to the second write command if the transmission cycle bit of the first write command matches the transmission cycle bit of the second write command.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: January 7, 2020
    Assignee: Lexmark International, Inc.
    Inventors: Nathan Wayne Foley, Jennifer Topmiller Williams, Gregory Scott Woods, Jimmy Daniel Moore, Jr.
  • Patent number: 10527967
    Abstract: A toner container includes a housing having a toner reservoir. An input gear is positioned on the housing for mating with a corresponding output gear in an image forming device when the toner container is installed in the image forming device. A toner agitator is movably positioned in the reservoir. The toner agitator is operatively connected to the input gear such that rotation of the input gear in a first rotational direction causes movement of the toner agitator for agitating toner in the reservoir. An encoded member is encoded with authentication information of the toner container and is operatively connected to the input gear such that rotation of the input gear in a second rotational direction causes movement of the encoded member for communicating the authentication information of the toner container to a controller of the image forming device when the toner container is installed in the image forming device.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: January 7, 2020
    Assignee: Lexmark International, Inc.
    Inventors: Randal Scott Williamson, Virgil Johnson, Jr.
  • Patent number: 10495999
    Abstract: A chemically prepared multilayered toner composition, according to one example embodiment, includes a core having a first amorphous polyester resin, a second amorphous polyester resin, a colorant, and a release agent. A first layer is formed around the core wherein the first layer includes the same second amorphous polyester resin that is in the toner core. A second layer is formed on the surface of the first layer, wherein the second layer includes a third amorphous polyester resin. A borax coupling agent is between the first and second layers. In an embodiment the ratio of the second polymer in the core to second polymer in the first layer is about 50:50. The second layer can also be referred to as a shell that is formed over the toner particle having a center core, first layer and borax coupling agent. In another embodiment, the core does not contain a second amorphous polyester resin.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: December 3, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jing X Sun, Corey Marcus Moran, Cory Nathan Hammond, Aaron Michael Dahlke
  • Patent number: 10496027
    Abstract: A replaceable unit for an electrophotographic image forming device according to one example includes a housing having a toner reservoir. An electrical connector mounted on the housing is movable between a retracted position and an operative position. The electrical connector includes an electrical contact for contacting a corresponding electrical contact in the image forming device. The electrical contact is electrically connected to processing circuitry on the housing. In the retracted position, the electrical connector is tucked into a portion of the housing. In the operative position, the electrical connector is exposed to permit the electrical contact to contact the corresponding electrical contact in the image forming device. A linkage is operatively connected to the electrical connector and includes an engagement surface accessible on an exterior of the housing to receive an actuation force. Movement of the linkage moves the electrical connector between the retracted position and the operative position.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: December 3, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Brian Scott Carpenter, Kyle Bradley Martin, Randal Scott Williamson
  • Patent number: 10495998
    Abstract: A chemically prepared multilayered toner composition, according to one example embodiment, includes a core having a first amorphous polyester resin, a second amorphous polyester resin, a colorant, and a release agent. A first layer is formed around the core wherein the first layer includes the same second amorphous polyester resin that is in the toner core. A second layer is formed on the surface of the first layer, wherein the second layer includes a third amorphous polyester resin. A borax coupling agent is between the first and second layers. In an embodiment the ratio of the second polymer in the core to second polymer in the first layer is about 50:50. The second layer can also be referred to as a shell that is formed over the toner particle having a center core, first layer and borax coupling agent. In another embodiment, the core does not contain a second amorphous polyester resin.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: December 3, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jing X Sun, Corey Marcus Moran, Cory Nathan Hammond, Aaron Michael Dahlke
  • Patent number: 10495991
    Abstract: A method to make an improved organic photoconductor drum of an electrophotographic image forming device is provided. The improved organic photoconductor drum is prepared using a curable composition including a charge transport molecule containing four radical polymerizable functional groups containing an oxygen atom of the general structure shown below: wherein R1 and R2 contain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, R3 and R4 are a non-radical polymerizable functional group, and R5 and R6 contain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one optional curing agent.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: December 3, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: David Glenn Black, Mark Thomas Bellino, Weimei Luo
  • Patent number: 10488780
    Abstract: An imaging device includes a photoconductive drum charged by a charge roll and opposed by a transfer roll to transfer an image from the drum. The drum becomes biased to a negative voltage by setting charges of negative voltage on both the charge roll and transfer roll. A controller switches the bias of the transfer roll to a positive voltage from the negative voltage and a delta or difference in a charge of the drum is determined from before and after the switching. Based on the delta, the voltage on the charge roll is boosted by a boost voltage to improve the charge on the drum. In this way, deteriorating or defective charge rolls can be still used to charge the drum to a proper voltage for imaging. Techniques for determining the delta, the boost and the magnitude of voltage charges are further embodiments.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: November 26, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Michael Brian Bacelieri, Douglas Anthony Able, Andrew Pryse Dale, Jared Kuohui Lin, Robert Watson McAlpine, Matthew Russell Smither
  • Patent number: 10488812
    Abstract: A replaceable unit for an electrophotographic image forming device according to one example embodiment includes an electrical contact positioned on a first side of a housing of the replaceable unit for contacting an electrical contact in the image forming device. A guide on the first side of the housing is positioned closer to a front of the housing than the electrical contact and leads rearward toward the electrical contact. The guide includes an inside surface that faces inward sideways toward a second side of the housing. At least a portion of the inside surface is angled inward sideways from front to rear permitting contact between the inside surface and an electrical connector in the image forming device to draw the electrical connector in the image forming device inward sideways relative to the replaceable unit during insertion of the replaceable unit into the image forming device.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: November 26, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Jeremy Keith Payne, Edward Lynn Triplett
  • Patent number: 10488811
    Abstract: A replaceable unit for an electrophotographic image forming device according to one example embodiment includes a housing having a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A first magnet and a second magnet are connected to the shaft and rotatable around the axis of rotation in response to rotation of the shaft. The first magnet and the second magnet pass near at least a portion of an inner wall of the housing forming the reservoir during rotation of the first and second magnets. An amount of angular offset between the first magnet and the second magnet varies depending on an amount of toner in the reservoir.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: November 26, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Brian Scott Carpenter, Robert Watson McAlpine
  • Patent number: 10481512
    Abstract: An improved organic photoconductor drum used in an electrophotographic image forming device and method to make the same is provided. The organic photoconductor drum contains a protective overcoat. The protective overcoat is prepared from a curable composition including a charge transport molecule containing four radical polymerizable hydrophilic functional groups containing an oxygen atom of the general structure shown below: where R1 and R2 contain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, R3 and R4 are a non-radical polymerizable functional group, and R5 and R6 contain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one curing agent. This organic photoconductor drum has excellent wear resistance without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its service life.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: November 19, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: David Glenn Black, Mark Thomas Bellino, Weimei Luo
  • Patent number: 10480584
    Abstract: An Oldham coupler assembly for transferring rotary power between two shafts in an imaging device. The Oldham coupler includes an input plate, an output plate, and a drive plate and two pairs of coupling wheels, and, in one embodiment, made of the same plastic material. The drive plate has a pair of open-ended slots along one axis and a close-ended center slot along a second axis orthogonal to the first axis. The drive plate is mechanically coupled and positioned in between the input plate and the output plate. A plastic retraction spline assembly is slidably retained in the output plate and engages with a drive member in an imaging unit. The input plate includes gear teeth integrally molded into the outer circumference thereof decreasing the overall width of the Oldham coupler. The two pairs of coupling wheels have the same diameter.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: November 19, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventor: Daniel Lee Carter
  • Patent number: 10481497
    Abstract: An imaging device has a photoconductive drum with a surface that is charged and selectively discharged to create a latent electrostatic image of an image to-be-printed for attracting toner for transfer to a media. A memory of the imaging device stores energy density values for use by the laser beam that can be accessed by a controller according to a predetermined number of media imaged by the photoconductive drum. During imaging, the controller controls the laser beam based on the stored energy density values. The energy density of the laser beam is increased or decreased when the laser beam is scanned along the photoconductive drum.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: November 19, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Michael Wesley Brown, Mark Edwin Kirtley Lund, Steven Alan Seng
  • Patent number: 10474046
    Abstract: The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In particular, the crash cooling process involves the addition of a toner slurry having a temperature between 70° C. and 90° C. to an equivalent amount of cold water having a temperature between 5° C. and 20° C. Polyester and styrene acrylic toners as well as polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this cooling process results in an improvement to the amount of toner waste, thereby achieving a higher toner usage efficiency for an electrophotographic printing system.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: November 12, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Kasturi Rangan Srinivasan, Rahel Bekru Bogale, Trent Duane Peter, Brian David Munson
  • Patent number: 10474093
    Abstract: A toner cartridge includes a photoconductive drum and a boss that protrudes outward from a first longitudinal end of the toner cartridge at a rotational axis of the photoconductive drum. An outermost axial segment of the boss along the rotational axis includes a partial cylinder having a cross-sectional shape of a circular segment. An outer circumferential surface of the partial cylinder is convex to a bottom of the toner cartridge and forms a bottom contact surface of the boss that is unobstructed to contact and sit in a corresponding V-block in an image forming device when the toner cartridge is installed in the image forming device. The outermost axial segment of the boss includes clearance above a topmost portion of the partial cylinder and within the radius of the outer circumferential surface of the partial cylinder permitting the clearance to accommodate one or more features in the image forming device.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: November 12, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Mark William Amann, Brian Lester Boettcher
  • Patent number: 10474060
    Abstract: A method for estimating an amount of toner in a reservoir of an image forming device according to one example embodiment includes rotating a shaft positioned in the reservoir. By rotating the shaft, a first magnet and a second magnet having a variable angular offset between them are rotated around an axis of rotation of the shaft. The first magnet and the second magnet are continually sensed at a point in their rotational paths. An amount of angular offset between the first magnet and the second magnet is continually determined from the sensing. An estimate of the amount of toner remaining in the reservoir is continually updated based on a predetermined correlation between the determined amount of angular offset between the first magnet and the second magnet and the amount of toner remaining in the reservoir.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: November 12, 2019
    Assignee: Lexmark International, Inc.
    Inventor: Michael Craig Leemhuis
  • Patent number: 10474061
    Abstract: A toner cartridge according to one example embodiment includes a housing having a toner reservoir. An outlet is positioned on the housing for exiting toner from the toner cartridge. An insert is selectably installable in the toner reservoir. The insert separates a first portion of the toner reservoir that is in fluid communication with the outlet from a remainder of the toner reservoir when the insert is installed in the toner reservoir providing a reduced capacity toner reservoir in the first portion of the toner reservoir.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: November 12, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Marc Frazier Baker, Kyle Benjamin Freels, Mark William Johnson
  • Patent number: D867445
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: November 19, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Darin Michael Gettelfinger, Matthew Ryan Keniston, Franklin Joseph Palumbo, Michael James Shanor, Jay Scott Siekmann, Christopher Kent Washing
  • Patent number: D868885
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: December 3, 2019
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Eugene Pangburn, Joseph Edwin Domhoff, Steven David Sieckowski