Patents by Inventor David Erwin

David Erwin 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).

  • Patent number: 7313228
    Abstract: The present invention allows a subscriber to dynamically select one or more call processing options while an attempt to terminate an incoming call to an associated terminal is being made. As such, the terminal is either ringing or providing some other indication that an incoming call is being received. Throughout the process, the incoming call may be answered via the terminal. While the attempt to terminate the call is being made, an incoming call message is sent to a computing device associated with the subscriber. The computing device, upon receiving the incoming call message, will provide one or more call processing options to the subscriber. If the subscriber selects one of the call processing options, the computing device will send a subscriber response message identifying the selected call processing option. Based on the selected call processing option, the incoming call will be processed accordingly.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: December 25, 2007
    Assignee: Nortel Networks Limited
    Inventors: Stephen Sorice, Rajeshwari Zala, Ketan Shah, Patrick S. Wood, David Erwin, Matthew Keller, Paresh Mehta
  • Patent number: 7292820
    Abstract: A removable media tray for an image forming apparatus includes a housing, an exit port in the housing, a primary media stack, and a multi-purpose tray (MPT) input. Within the tray are first and second pick mechanisms operative to select a media sheet from the primary stack or MPT stack, respectively, and move the media sheet to the image forming apparatus through the exit port. A motor is disposed within the tray housing, and first and second drive assemblies operatively connect the motor to the first and second pick mechanisms, respectively. The motor drives the first pick mechanism forward by rotating in one direction, and drives the second pick mechanism forward by rotating in the opposite direction. A media sensor in the exit port senses media sheets from a variety of sources, including the primary media stack, the MPT stack, a duplex return path, or a large-capacity media sheet supply.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: November 6, 2007
    Assignee: Lexmark International, Inc.
    Inventors: Edward Lynn Triplett, Larry Steven Foster, David Erwin Rennick, Daniel L. Carter, Richard G. Boyatt, III
  • Patent number: 7290765
    Abstract: An exit roll for use in an image forming device. The exit roll may include a body and a kicker section each configured to mount to a shaft. The kicker section may include a plurality of fingers spaced around the periphery. Each of the fingers may include a first section that is substantially parallel to the shaft, and a second section that extends outward way from the shaft. The fingers may be flexible in an upwards and downwards direction into and away from the shaft. The exit roll is constructed to move media sheets out of the exit port and away from the image forming device.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: November 6, 2007
    Assignee: Lexmark International, Inc.
    Inventors: Daniel L. Carter, Larry Steven Foster, Brian Allen Blair, David Erwin Rennick
  • Patent number: 7272351
    Abstract: Devices and methods for directing a media sheet along a media path within an image forming apparatus. The media path includes rollers that form a media nip, one or more deflectors, and a transport belt. The media nip conveys the media sheet along the media path into one or more deflectors. The one or more deflectors are positioned between the nip and the transport belt. The one or more deflectors control the angle of the media sheet as it approaches the transport belt and facilitates attachment of the media sheet to the transport belt. The transport belt then moves the media sheet past one or more image forming units and receives a toner image.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: September 18, 2007
    Assignee: Lexmark International, Inc.
    Inventors: Niko Jay Murrell, Edward Lynn Triplett, David Erwin Rennick
  • Patent number: 7162182
    Abstract: A door assembly movably positioned to a body of an image forming device. The door assembly includes a first frame and a second frame. The first frame is movably attached to the body, and the second frame is movably attached to the first frame. The movable connections between the frames and the main body cause accurate locating of a photoconductive member mounted on the door assembly within the body. In one embodiment, a contour surface within the body contacts the second frame to locate the second frame within the body. Methods of moving the door assembly are also disclosed including moving the door assembly from an open orientation that is spaced from the body, to a closed orientation that is in proximity to the body. The movement of the door assembly causes interaction between the frames and the body to accurately locate the second frame.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: January 9, 2007
    Assignee: Lexmark International, Inc.
    Inventors: Jeffrey L. Tonges, Richard G. Boyatt, III, Daniel L. Carter, Kerry Leland Embry, Larry Steven Foster, Harald Portig, David Erwin Rennick, Darren Wayne Tosh, Edward Lynn Triplett
  • Patent number: 7136609
    Abstract: An image forming device having a main body and a movable subunit. The subunit is movable between a first orientation and a second orientation. A developer member is positioned within the main body, and a photoconductive member is positioned on the subunit. In the first orientation, the developer member and photoconductive member are spaced apart. In the second orientation, the photoconductive member is positioned either in contact with or closely located to the developer member. Image formation occurs when the subunit is in the second orientation as toner is transferred from the developer member to the photoconductive member. Methods of using the image forming device include positioning the developer member in the main body and the photoconductive member on the subunit, and moving the subunit from a first orientation to a second orientation such that image formation can occur.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: November 14, 2006
    Assignee: Lexmark International, Inc.
    Inventors: Benjamin Alan Askren, Larry Steven Foster, Edward Lynn Triplett, David Erwin Rennick
  • Patent number: 7130562
    Abstract: In an image forming apparatus containing a plurality of rollers disposed with generally parallel axes, a retraction plate containing a plurality of rotational couplings is movable between engaged and retracted positions. Each rotational coupling is operative to transmit a rotary force to each cartridge when the retraction plate is in the engaged position. The couplings move laterally in an axial direction of the rollers as the retraction plate moves between the engaged and retracted positions, in response to an applied force. In one embodiment, the retraction plate is rotated about a pivot point to move the couplings between engaged and retracted positions. In another embodiment, the retraction plate is translated laterally in the axial direction of the couplings.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: October 31, 2006
    Assignee: Lexmark International, Inc.
    Inventors: Larry Steven Foster, Edward Lawrence Kiely, Robert Galon Newman, Harald Portig, David Erwin Rennick, Edward Lynn Triplett
  • Patent number: 7085507
    Abstract: An image forming apparatus includes a waste toner system that collects waste toner in a waste toner container. An amount of waste toner collected in the container is increased by using a motor-driven toner distributing member that distributes accumulated toner within the container. The waste toner system may detect the accumulation of waste toner by monitoring a motor control circuit while the toner distributing member is being driven. For example, the system may detect excess accumulation by comparing the monitored values of a speed control signal with one or more reference values corresponding to nominal accumulation conditions. Whether or not the motor is speed controlled, the apparatus may use a shared motor that drives one or more image forming process members and the toner distributing member. A drive arrangement may be used to selectively drive the toner distributing member based on motor direction to avoid interfering with image forming operations.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: August 1, 2006
    Assignee: Lexmark International, Inc.
    Inventors: William Paul Cook, Tom E Stickler, Larry Steven Foster, David Erwin Rennick
  • Patent number: 6279899
    Abstract: A substrate sensing mechanism is provided for use in a printer output bin. The sensing mechanism includes a flag having a shape such that when one or more substrates, which have been removed from the bin, are manually reinserted into the bin, the one or more substrates are directed beneath the flag without causing a substrate feed failure. The flag is also positioned and shaped so as to move to a full bin position when a portion of one or more curled substrates extends to or above a level of the substrate output path immediately adjacent the bin entrance.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: August 28, 2001
    Assignee: Lexmark International, Inc.
    Inventors: Johnnie A. Coffey, David Erwin Rennick, Kevin Dean Schoedinger, William Joseph Thornhill
  • Patent number: 6224126
    Abstract: A recreational vehicle including a “slide-out” cabin portion is equipped with a locking mechanism which comprises a lock door pivotally rotatable to interfere with the wall opening periphery through which the slide-out cabin portion transitions. The slide-out further has an extensible portion front end positioned external to the wall opening such that the dimensions of the extensible portion front end exceed the dimensions of the wall opening. The extensible portion front end contacts the main cabin wall opening periphery along the entire perimeter of the wall opening thus completely sealing the wall opening when the slide-out is in a fully retracted position. Further, the slide-out locks are positioned sufficiently close to the extensible portion front end that when the slide-out is in a retracted position and the slide-out locks are in the locked position, the main cabin wall periphery is pinched between the slide-out locks and the extensible portion front end.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: May 1, 2001
    Assignee: Thor Tech, Inc.
    Inventors: Larry Allan Martin, David Erwin Carpenter, Michael Charles Hyndman
  • Patent number: 6126164
    Abstract: A bail assembly has a first portion of an arm pivotally supported by a printer frame. A second portion of the arm is slidably supported by the first portion of the arm so that the length of the arm can be adjusted in accordance with the length of sheets being fed to a support for stacking. The second portion of the arm has a stop pivotally mounted on its distal end. The stop has a flange for engaging each of the fed sheets so that the leading edges of the sheets are in substantial vertical alignment. The first portion of the arm has notches, which are spaced apart the differences in the sizes of the sheets being fed, to receive a detent on the second portion of the arm to releasably hold the second portion of the arm in its adjusted position on the first portion of the arm. The second portion of the arm has two curved surfaces for engaging each fed sheet adjacent its leading edge in a transverse line point contact prior to the pivotally mounted stop engaging the leading edge of the fed sheet.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: October 3, 2000
    Assignee: Lexmark International, Inc.
    Inventors: David Erwin Rennick, William Joseph Thornhill, John Wayne Gassett
  • Patent number: 5802432
    Abstract: Toner cartridge (1) has a unitary assembly forming the handle (3a, 3b), the cover (25), side walls (33, 245) and the cleaner chamber (27) and hold the photoconductor drum (43). Each of the side walls has a U-shaped housing (35, 247) which loosely receives a pin (37a, 37b) from the side of the hopper (61). The hopper is part of a unitary assembly holding the toner adder roller (45) and the developer roller (43). Second pins (131a, 131b) from the sides of the hopper carry springs which pull the two assemblies together to press the developer roller against the photoconductor. The hopper also has flat ledges (161a, 133a) on each side for movement on roller in the printer. This further permits the cartridge to have central locating elements (29a, 29b), wing-like guides (9a, 9b) for insertion, links (13a, 13b) to open a lower shutter (7), and unobstructed ends of photoconductor shaft (47) for positively locating on that shaft.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: September 1, 1998
    Assignee: Lexmark International, Inc.
    Inventors: Johnnie A. Coffey, Steven Alan Curry, Larry Steven Foster, Paul Douglas Horrall, John Randolph McIntyre, Richard Alden Ramsdell, David Erwin Rennick
  • Patent number: 5768661
    Abstract: A toner cartridge (1) has wing-like guides (9a, 9b) on opposite sides, the guides being curved to follow a curved guide track in a printer in which the cartridge is installed. The cartridge may be readily grasped by handles (3a, 3b) and inserted in the guide tracks of the printer near the top and front and then readily directed down and into the rear area of the printer.The guides are thin at their initial location of entry into the printer for easy insertion and increase to larger thickness regions (9aa, 9bb) to better guide the cartridge. The guides are a part of a unitarily molded cover assembly which includes the side walls (33, 241, 245).
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 16, 1998
    Assignee: Lexmark International, Inc.
    Inventors: Johnnie A. Coffey, Larry Steven Foster, Paul Douglas Horrall, John Randolph McIntyre, Richard Alden Ramsdell, David Erwin Rennick
  • Patent number: 5758233
    Abstract: A toner cartridge (1) contains a photoconductive drum (43) having a central shaft (47). The shaft extends outward from the sides of the cartridge so that it can be lowered on a V-shaped locator (301) in the printer. An assembly of a hopper (61), toner adder roller (45) and developer roller (43) is attached to an assembly carrying the photoconductive drum through springs (132a, 132b). The hopper assembly has center locating surfaces (29a, 29b) to receive a downward pressing member from the printer and flat ledges (161a, 133a) to contact rollers in the printer, which permits adjustment of the contact between the drum and the developer roller while positively locating the drum. The cover assembly also has flat locating surfaces (449, 451) near the hopper to rest on the printer frame.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: May 26, 1998
    Assignee: Lexmark International, Inc.
    Inventors: Johnnie A. Coffey, Larry Steven Foster, Paul Douglas Horrall, David Erwin Rennick