Patents by Inventor Dennis M. Lengyel

Dennis M. Lengyel 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).

  • Publication number: 20090027465
    Abstract: An ink cartridge has a body having a plurality of side walls forming an internal cavity therein, the internal cavity is substantially filled with ink. An ink supply flow path formed in one of the side walls. An ink supply port is formed in another of the side walls, wherein the ink supply flow path extends to the ink supply port. The side wall having the ink supply port further has one or more angled surfaces for guiding the ink cartridge into a printer. A tab is provided for aligning the cartridge during installation into the printer. A pad is provided to overcome the friction force of installing the cartridge into the printer.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 29, 2009
    Inventors: Richard H. Berg, Dennis M. Lengyel, Kevin D. Cowley
  • Patent number: 7334887
    Abstract: An ink container shell for an ink jet cartridge has spaced apart side walls, a front wall, a rear wall, and a bottom wall, a partition in said shell dividing the interior thereof into first and second chambers for respectively receiving an ink and an ink absorbing material, an opening through the partition for communicating ink in said first chamber with ink absorbing material in the second chamber, and which has a height greater than its width. The shell further includes an outlet port in the bottom wall of the second chamber provided with a wick retaining arrangement, and a block of ink absorbing material in the second chamber having an angled surface facing the opening through the partition and having an area greater than the area of the opening. A lever and tongue component for releasably interengaging the container with a holder therethrough has smooth surfaces and edges to facilitate handling of the container.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: February 26, 2008
    Assignee: Nu-kote International, Inc.
    Inventors: Stephen A. Andersen, Dennis M. Lengyel
  • Patent number: 7255433
    Abstract: The invention relates to a multiple pass printing process for generating MICR-readable indicia using a MICR ink-jet ink composition with a magnetic pigment loading less than that needed to generate the nominal signal level according to the ANSI standard with single pass printing, and to a printed substrate, prepared by the process, which bears MICR-readable indicia having at least two layers of the MICR ink-jet ink composition and which demonstrates a MICR signal level of greater than or equal to the nominal signal value according to the ANSI standard.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: August 14, 2007
    Assignee: Nu-Kote International, Inc.
    Inventors: Michael J. McElligott, Thomas W. Martin, Donald E. Snyder, Jr., Dennis M. Lengyel, Philip Theodore
  • Patent number: 7140714
    Abstract: A flow resistance measuring or black-pressure tester is provided for ink cartridges. A syringe pump extracts fluid at a desired flow rate from an outlet port of an ink cartridge. An ink removal device allows a user to selectively purge air from the system to improve the accuracy of the meassurements. A variety of flow rates are measured to collect as benchmark data and allow new designs to be similarly sized, specified, and materials and pathways selected to control fluid delivery in replacement ink cartridges.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: November 28, 2006
    Assignee: Nu-Kote International, Inc.
    Inventor: Dennis M. Lengyel
  • Patent number: 7137688
    Abstract: An ink container shell for an ink jet cartridge has an ink chamber provided with an optical ink detection device in the form of a single or multi-segment prism having interface surfaces for reflecting light in a scan plane from a first to a second exterior area relative to the container shell when an ink level in the chamber recedes to a given level. The multi-segment prism provides for scanning a cartridge in different scanning planes. Either a single prism or the multi-segment prism can be separate from the cartridge and interengaged therewith by a snap-fit.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: November 21, 2006
    Assignee: Nu-Kote International, Inc.
    Inventors: Stephen A. Andersen, Dennis M. Lengyel
  • Patent number: 7066587
    Abstract: An ink container shell for an ink jet cartridge has spaced apart side walls, a front wall, a rear wall, and a bottom wall, and is provided with a partition structure which divides the interior thereof into three ink chambers, at least one of which has a non-rectangular profile in cross-section transverse to said side, front and rear walls. The partition structures enable varying the volumes of the ink chambers with respect to a given shell exterior profile and enable isolating two the chambers from one another by interposing the third chamber therebetween.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: June 27, 2006
    Assignee: Nu-Kote International, Inc.
    Inventors: Stephen A. Andersen, Dennis M. Lengyel
  • Patent number: 6663234
    Abstract: A fluid cartridge for dispensing fluid, such as liquid ink for a drop on demand ink jet printer, includes a housing that encloses a capillary chamber, and has an outlet port through the one wall of the housing into the capillary chamber. Capillary material in the capillary chamber is arranged so that it has a higher density adjacent the outlet port than away from the outlet port, to enhance the flow of the fluid toward the outlet port. The interior of the capillary chamber is structured to provide greater compression to the capillary material around the outlet port, and provide stability to retain the variable compression of the capillary material.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: December 16, 2003
    Assignee: Xerox Corporation
    Inventors: Bryan J. Roof, Dennis M. Lengyel, Edward M. Carrese, David P. Breemes, Sr., Louis F. Lavallee, Sara Reynolds, Hiep H. Nguyen, Eric A. Merz, Christopher S. Mullin
  • Patent number: 6527383
    Abstract: An ink tank which has an ink delivery port chamber and one or more free ink chambers is provided with free ink chamber ceiling heights which are lower than the ceiling height of the ink delivery port chamber to reduce the amount of air trapped in the ink tank when the ink tank is filled with ink, and to locate air trapped in the ink tank in the ink delivery port chamber.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: March 4, 2003
    Assignee: Xerox Corporation
    Inventors: Dennis M. Lengyel, Eric A. Merz, Edward M. Carrese, David P. Breemes, Hiep Nguyen
  • Patent number: 6520612
    Abstract: A low ink sensing system is combined with an ink cartridge detection system to enable a more efficient ink jet printer. An ink container which supplies ink to an associated printhead is modified by the incorporation of two light directing elements, in the preferred embodiment, a curvilinear prism-like structure and a curvilinear roof mirror, into a transparent wall of the container housing. The cartridge, comprising the ink container and associated printhead, is mounted on a scan carriage. Periodically, the carriage is conveyed to a sensing station comprising a pair of light sources and a commonly used photosensor. A first light source is energized and a beam of light is directed to a location where the curvilinear roof mirror would be positioned if the cartridge is present. If the cartridge is absent, lack of a reflected return signal is sensed, indicating a cartridge has not been inserted. Print operation is halted until a cartridge is inserted.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: February 18, 2003
    Assignee: Xerox Corporation
    Inventors: Eric A. Merz, Richard E. Butts, Dennis M. Lengyel
  • Publication number: 20020186286
    Abstract: A fluid cartridge for dispensing fluid, such as liquid ink for a drop on demand ink jet printer, includes a housing that encloses a capillary chamber, and has an outlet port through the one wall of the housing into the capillary chamber. Capillary material in the capillary chamber is arranged so that it has a higher density adjacent the outlet port than away from the outlet port, to enhance the flow of the fluid toward the outlet port. The interior of the capillary chamber is structured to provide greater compression to the capillary material around the outlet port, and provide stability to retain the variable compression of the capillary material.
    Type: Application
    Filed: March 15, 2002
    Publication date: December 12, 2002
    Applicant: Xerox Corporation
    Inventors: Bryan J. Roof, Dennis M. Lengyel, Edward M. Carrese, David P. Breemes, Louis F. Lavallee, Sara Reynolds, Hiep H. Nguyen, Eric A. Merz, Christopher S. Mullin
  • Patent number: 6460962
    Abstract: A printhead cartridge identification system is disclosed which ensures that an ink jet printer operates only with ink jet cartridges compatible with the specific printer function. An ink container which supplies ink to an associated printhead has a light reflector incorporated into a transparent wall of the ink container housing. The cartridge, comprising the ink container and associated printhead, is mounted on a scan carriage. Periodically, the carriage is conveyed to an optical station comprising a light source and a photosensor. The light source is energized and a beam of light is directed towards the reflector.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: October 8, 2002
    Assignee: Xerox Corporation
    Inventors: Steven J. Dietl, Dennis M. Lengyel, Donald M. Stevens, Vincent J. Ouellette, Vladimir M. Kupchik
  • Patent number: 6447109
    Abstract: A fluid cartridge, such as a cartridge for filling with ink for use in ink jet printhead includes a wick chamber that has outer walls, and forms a wick chamber and a fluid chamber. The outer walls of the fluid chamber are formed to provide no fluid communication with the fluid chamber except through the wick chamber. The ink fluid cartridge is filled by evacuating gas from the ink chamber and from the wick chamber, and then supplying ink into the wick chamber until the ink substantially saturates the wick material, and flows into the ink chamber.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: September 10, 2002
    Assignee: Xerox Corporation
    Inventors: Holly M. Williamson, Dennis M. Lengyel, Steven J. Dietl, Hiep H. Nguyen
  • Patent number: 6254226
    Abstract: A fluid cartridge, such as a cartridge for filling with ink for use in ink jet printhead includes a wick chamber that has outer walls, including a top wall, and an ink chamber formed of a plurality of outer walls. A fluid conduit connects the ink chamber and the wick chamber. The outer walls of the ink chamber are formed to provide no fluid communication between the ink chamber and the ambient environment, except through the fluid conduit and the wick chamber. A vent opening through the top wall of the wick chamber provides communication between the wick chamber and the ambient environment, and an outlet opening through an outer wall other than the top wall of the wick chamber provides fluid communication for the ink to flow from the wick chamber. A vent tube extends from the vent opening into the interior of the wick chamber, and projections extend from the top wall of the wick chamber into the interior of the wick chamber, farther than does the vent tube.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: July 3, 2001
    Assignee: Xerox Corporation
    Inventors: Dennis M. Lengyel, Hiep H. Nguyen
  • Patent number: 6250749
    Abstract: A fluid cartridge, such as a cartridge for filling with ink for use in ink jet printhead includes a housing enclosing a wick chamber, the housing including a top wall. The housing also includes an ink chamber. A fluid conduit connects the ink chamber and the wick chamber. The outer surface of the top wall of the housing is formed with a recess. A vent opening through the top wall of the wick chamber, at the recess, provides communication between the wick chamber and the recess. A covering over the top surface of the housing encloses the recess. An outlet opening through an outer wall other than the top wall of the wick chamber provides fluid communication for the ink to flow from the wick chamber. One end of an overflow tube is in fluid communication with the recess in the top wall of the housing.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: June 26, 2001
    Assignee: Xerox Corporation
    Inventors: Eric A. Merz, Hiep H. Nguyen, Edward M. Carrese, Dennis M. Lengyel
  • Patent number: 5821966
    Abstract: In one embodiment of an ink jet print cartridge wherein ink flows from an ink container to a printhead via an ink manifold which includes an ink pipe which projects into an outlet port in the ink container. The interface between the manifold and the outlet port is sealed by placing a foam member, in compression, between two adjoining surfaces. In one embodiment, the foam is a closed cell neoprene. In another embodiment, the foam is a dual membrane consisting of a first layer of closed cell foam laminated to an open cell foam. In a third embodiment, a member is used to both seal the pipe to outlet port interface and also to wipe the ink pipe clear of ink. A polyurethane member is affixed to the outside surface of the ink container adjacent the outlet port. The polyurethane member has an aperture with a diameter which is smaller than the outside diameter of the ink pipe.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: October 13, 1998
    Assignee: Xerox Corporation
    Inventors: Richard P. Schell, Richard C. Keefe, Vincent J. Ouellette, Norman S. Edgett, Dennis M. Lengyel
  • Patent number: D448797
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: October 2, 2001
    Assignee: Xerox Corporation
    Inventors: Edward M. Carrese, Hiep Nguyen, Eric A. Merz, Bruce A. LaPlant, Richard E. Butts, Douglas J. Baxendell, Dennis M. Lengyel, David P. Breemes
  • Patent number: D452875
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: January 8, 2002
    Assignee: Xerox Corporation
    Inventors: Edward M. Carrese, Hiep Nguyen, Eric A. Merz, Bruce A. LaPlant, Richard E. Butts, Douglas J. Baxendell, Dennis M. Lengyel, David P. Breemes
  • Patent number: D456446
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: April 30, 2002
    Assignee: Xerox Corporation
    Inventors: Edward M. Carrese, Hiep Nguyen, Eric A. Merz, Bruce A. LaPlant, Richard B. Butts, Douglas J. Baxendell, Dennis M. Lengyel, David P. Breemes
  • Patent number: D425110
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: May 16, 2000
    Assignee: Xerox Corporation
    Inventors: Steven J. Dietl, Roger W. Ellender, Dennis M. Lengyel