Patents by Inventor Todd Cleland
Todd Cleland 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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Publication number: 20090021702Abstract: A projection kiosk for a multi-projector digital signage system includes an enclosure and a frame disposed therein. The frame includes attachment points which can hold in position a plurality of projectors. The projectors may be aligned with sub-pixel-resolution accuracy to enable projection of pixel-aligned images onto a screen. The enclosure includes a heat ducting subsystem configured to direct air into the enclosure, duct air through the projectors, and discharge air away from a projection path between the plurality of projectors and the screen.Type: ApplicationFiled: July 20, 2007Publication date: January 22, 2009Inventors: Todd A. Cleland, Thomas M. Carrico, William R. Wagner, Steven W. Greer, Ron R. Bendsneyder
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Publication number: 20090019472Abstract: A system for pricing advertising includes an electronic video display disposed in an advertising venue, wherein the display is configured to display advertising; a sensor configured to sense a number of people in an audience of the electronic video display; and a processing element for determining pricing for the advertising. The pricing for the advertising is determined based on the number of people in the audience. A method of pricing advertising, the method includes determining a number of people in an audience of an electronic video display disposed at an advertising venue on which the advertising is displayed; and determining pricing of the advertising based on the number of people in the audience.Type: ApplicationFiled: July 9, 2007Publication date: January 15, 2009Inventors: Todd A. Cleland, Darryl Greig
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Patent number: 7004556Abstract: Several improvements have been made in inkjet print cartridges to realize 5 ng drop weights at ejection frequencies of 18 KHz. These improvements include small nozzle openings, improved heater resistor efficiency, and better ink supply reliability.Type: GrantFiled: September 28, 2004Date of Patent: February 28, 2006Assignee: Hewlett-Packard Development, L.P.Inventors: Todd A. Cleland, Robert C. Maze, Michael D. Miller, Rama Prasad, Robert N. K. Browning, Dale R. Oughton, Joseph M. Torgerson, Kenneth D. Saul, Michael B. Hager, Douglas M. Collins, Leslie A. Field, Storrs Hoen, Phillip W. Barth
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Publication number: 20050104934Abstract: Several improvements have been made in inkjet print cartridges to realize 5 ng drop weights at ejection frequencies of 18 KHz. These improvements include small nozzle openings, improved heater resistor efficiency, and better ink supply reliability.Type: ApplicationFiled: September 28, 2004Publication date: May 19, 2005Inventors: Todd Cleland, Robert Maze, Michael Miller, Rama Prasad, Robert Browning, Dale Oughton, Joseph Torgerson, Kenneth Saul, Michael Hager, Douglas Collins, Leslie Field, Storrs Hoen, Phillip Barth
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Patent number: 6799822Abstract: A fluid ejection device includes a substrate, drop generators formed on the substrate at a high density, primitive select lines, and a ground line. The drop generators are arranged in primitives of drop generators. Each drop generator includes a heater resistor having a high resistance. Each primitive select line is separately electrically coupled to a corresponding one of the primitives and is configured to connect to a power source. The ground line is electrically coupled to all of the primitives.Type: GrantFiled: October 7, 2002Date of Patent: October 5, 2004Assignee: Hewlett-Packard Development Company, L.P.Inventors: Todd A. Cleland, Robert C. Maze, Michael D. Miller, Rama Prasad, Robert N. K. Browning, Dale R. Oughton, Joseph M. Torgerson, Kenneth D. Saul, Michael B. Hager, Douglas M. Collins, Leslie A. Field, Storrs Hoen, Phillip W. Barth
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Patent number: 6662435Abstract: A method of manufacturing an ink jet print head with a substrate defining an ink aperture. A number of ink energizing elements are located on the major surface of the substrate. A barrier layer is connected to the upper surface, and peripherally encloses an ink manifold. The barrier encompasses the ink aperture. An orifice plate is connected to the barrier layer, spaced apart from the substrate's major surface, enclosing the ink manifold. The plate defines a number of orifices, each associated with a respective ink energizing element. The ink manifold is an elongated chamber having opposed ends defined by end wall portions of the barrier layer. The barrier end wall portions each have an intermediate end wall portion protruding into the manifold.Type: GrantFiled: October 5, 2000Date of Patent: December 16, 2003Assignee: Hewlett-Packard Development Company, LPInventors: Robert C. Maze, Douglas M. Collins, Todd A. Cleland, Leslie A. Field, Storrs T. Hoen, Phillip W. Barth
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Patent number: 6594899Abstract: An inkjet printing device employs an inkjet printhead with a plurality of drop generators to eject drops of ink. Each drop generator includes a planar heater resistor, a protection layer having a first heating surface on the heater resistor and a second heating surface entirely surrounding the first heater surface on the heater resistor, and an ink ejection nozzle. The drop generator vaporizes ink at the first heating surface and ejects a drop of ink of a first mass from the nozzle when a first range of energies is applied to the heater resistor. The drop generator vaporizes ink at the first heating surface and the second heating surface and ejects a drop of ink of a second mass from the nozzle when a second range of energies is applied to the heater resistor.Type: GrantFiled: February 14, 2001Date of Patent: July 22, 2003Assignee: Hewlett-Packard Development Company, L.P.Inventors: Robert C. Maze, Todd A. Cleland, Arun K. Agarwal, Mark A. Buonanno
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Publication number: 20030117462Abstract: Several improvements have been made in inkjet print cartridges to realize 5 ng drop weights at ejection frequencies of 18 KHz. These improvements include small nozzle openings, improved heater resistor efficiency, and better ink supply reliability.Type: ApplicationFiled: October 7, 2002Publication date: June 26, 2003Inventors: Todd A. Cleland, Robert C. Maze, Michael D. Miller, Rama Prasad, Robert N.K. Browning, Dale R. Oughton, Joseph M. Torgerson, Kenneth D. Saul, Michael B. Hager, Douglas M. Collins, Leslie A. Field, Storrs T. Hoen, Phillip W. Barth
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Patent number: 6536878Abstract: This present invention is embodied in a low-cost printing system including a printhead and an ink composition that provides photographic-quality resolution. The printhead of the present invention includes a high-density array of drop generators that eject ink drops having a low drop weight and that operate at a high frequency. Further, high-resistance firing resistors are used to provide minimum energy dissipation and the firing resistors are preferably thin-film resistors to ensure that a minimal amount of energy is needed to eject ink drops. The stability of the ink drop volume is maintained by including an overdamped structure within the ink drop generators that allow the ink chambers to fill up with ink slowly. The ink composition of the present invention includes an ink additive that prevents decel from occurring during sustained high-frequency printing bursts.Type: GrantFiled: June 12, 2001Date of Patent: March 25, 2003Assignee: Hewlett-Packard CompanyInventors: Vladek P. Kasperchik, Kenneth W. Peterson, Todd A. Cleland, Robert C. Maze
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Patent number: 6491377Abstract: A high quality inkjet printhead includes a substrate having a multiplicity of heater resistors formed thereon at a density of at least six heater resistors per square millimeter. Each of the heater resistors also has a total resistance of at least 70 &OHgr; and an overlaying passivation thermal barrier characteristic adjusted to enable ejection of an ink drop of less than 6.5 ng with an energy impulse equal to or less than 1.4 &mgr;joules.Type: GrantFiled: August 30, 1999Date of Patent: December 10, 2002Assignee: Hewlett-Packard CompanyInventors: Todd A. Cleland, Robert C. Maze, Michael D. Miller, Rama Prasad, Robert N. K. Browning, Dale R. Oughton, Joseph M. Torgerson, Kenneth D. Saul, Michael B. Hager, Douglas M. Collins, Leslie A. Field, Storrs T. Hoen, Phillip W. Barth
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Patent number: 6478410Abstract: This present invention is embodied in a low-cost printing system including a printhead and an ink composition that provides photographic-quality resolution. The printhead of the present invention includes a high-density array of drop generators that eject ink drops having a low drop weight and that operate at a high frequency. Further, high-resistance firing resistors are used to provide minimum energy dissipation and the firing resistors are preferably thin-film resistors to ensure that a minimal amount of energy is needed to eject ink drops. The stability of the ink drop volume is maintained by including an overdamped structure within the ink drop generators that allow the ink chambers to fill up with ink slowly. The ink composition of the present invention includes an ink additive that prevents decel from occurring during sustained high-frequency printing bursts.Type: GrantFiled: August 23, 2001Date of Patent: November 12, 2002Assignee: Hewlett-Packard CompanyInventors: Rama Prasad, Todd A. Cleland, Robert C Maze, Dale R. Oughton
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Patent number: 6402296Abstract: A high resolution printer includes a printhead having optimized features including 12 to 14 micron diameter orifices spaced apart from adjacent orifices by a distance of between 76 to 94 microns. The orifice plate is electroformed and plated to a thickness ranging from 20 to 25 microns. A polymeric barrier layer secures the orifice plate to a printhead substrate.Type: GrantFiled: October 29, 1998Date of Patent: June 11, 2002Assignee: Hewlett-Packard CompanyInventors: Todd A. Cleland, Rio Rivas, David Pidwerbecki
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Publication number: 20020041308Abstract: A thermal ink jet print head with an orifice plate for defining numerous of orifice apertures and numerous strain relief elements. Each strain relief element is a closed slit between abutting and separable portions of the plate, such that a stress applied to the plate across the strain relief element will tend to open the slot, or cause the edges to move in a direction perpendicular to the plane of the plate, or otherwise provide a thin cross section that deforms more easily, thereby limiting strain in other portions of the plate.Type: ApplicationFiled: December 13, 2001Publication date: April 11, 2002Inventors: Todd A. Cleland, Garrard Hume
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Patent number: 6360439Abstract: A method of manufacturing an orifice plate for a fluid ejection device comprises defining a plurality of orifice apertures in a substantially planar plate; and defining a plurality of closed slits in the plate.Type: GrantFiled: August 5, 1998Date of Patent: March 26, 2002Assignee: Hewlett-Packard CompanyInventors: Todd A. Cleland, Garrard Hume
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Publication number: 20020018103Abstract: This present invention is embodied in a low-cost printing system including a printhead and an ink composition that provides photographic-quality resolution. The printhead of the present invention includes a high-density array of drop generators that eject ink drops having a low drop weight and that operate at a high frequency. Further, high-resistance firing resistors are used to provide minimum energy dissipation and the firing resistors are preferably thin-film resistors to ensure that a minimal amount of energy is needed to eject ink drops. The stability of the ink drop volume is maintained by including an overdamped structure within the ink drop generators that allow the ink chambers to fill up with ink slowly. The ink composition of the present invention includes an ink additive that prevents decel from occurring during sustained high-frequency printing bursts.Type: ApplicationFiled: June 12, 2001Publication date: February 14, 2002Inventors: Vladek P. Kasperchik, Kenneth W. Peterson, Todd A. Cleland, Robert C. Maze
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Patent number: 6309052Abstract: This present invention is embodied in a low-cost printing system including a printhead and an ink composition that provides photographic-quality resolution. The printhead of the present invention includes a high-density array of drop generators that eject ink drops having a low drop weight and that operate at a high frequency. Further, high-resistance firing resistors are used to provide minimum energy dissipation and the firing resistors are preferably thin-film resistors to ensure that a minimal amount of energy is needed to eject ink drops. The stability of the ink drop volume is maintained by including an overdamped structure within the ink drop generators that allow the ink chambers to fill up with ink slowly. The ink composition of the present invention includes an ink additive that prevents decel from occurring during sustained high-frequency printing bursts.Type: GrantFiled: August 30, 1999Date of Patent: October 30, 2001Assignee: Hewlett-Packard CompanyInventors: Rama Prasad, Todd A. Cleland, Robert C Maze, Dale R. Oughton
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Patent number: 6290336Abstract: In order to overcome inefficient power dissipation in parasitic resistances and to provide economies in the power supply, a higher resistance value segmented heater resistor is employed in a thermal inkjet printhead. A production tolerance early failure mechanism is avoided with the use of a cut introduced into the conductive shorting bar coupling the segments of the heater resistor.Type: GrantFiled: September 25, 2000Date of Patent: September 18, 2001Assignee: Hewlett-Packard CompanyInventor: Todd A. Cleland
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Patent number: 6270201Abstract: This present invention is embodied in a low-cost printing system including a printhead and an ink composition that provides photographic-quality resolution. The printhead of the present invention includes a high-density array of drop generators that eject ink drops having a low drop weight and that operate at a high frequency. Further, high-resistance firing resistors are used to provide minimum energy dissipation and the firing resistors are preferably thin-film resistors to ensure that a minimal amount of energy is needed to eject ink drops. The stability of the ink drop volume is maintained by including an overdamped structure within the ink drop generators that allow the ink chambers to fill up with ink slowly. The ink composition of the present invention includes an ink additive that prevents decel from occurring during sustained high-frequency printing bursts.Type: GrantFiled: August 30, 1999Date of Patent: August 7, 2001Assignee: Hewlett-Packard CompanyInventors: Vladek P. Kasperchik, Kenneth W. Peterson, Todd A. Cleland, Robert C. Maze
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Publication number: 20010008411Abstract: An inkjet printing device employs an inkjet printhead with a plurality of drop generators to eject drops of ink. Each drop generator includes a planar heater resistor, a protection layer having a first heating surface on the heater resistor and a second heating surface entirely surrounding the first heater surface on the heater resistor, and an ink ejection nozzle. The drop generator vaporizes ink at the first heating surface and ejects a drop of ink of a first mass from the nozzle when a first range of energies is applied to the heater resistor. The drop generator vaporizes ink at the first heating surface and the second heating surface and ejects a drop of ink of a second mass from the nozzle when a second range of energies is applied to the heater resistor.Type: ApplicationFiled: February 14, 2001Publication date: July 19, 2001Inventors: Robert C. Maze, Todd A. Cleland, Arun K. Agarwal, Mark A. Buonanno
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Patent number: 6247798Abstract: In accordance with the invention a multi-chamber printhead barrier design that is compensated for differences in ink properties is disclosed. The printhead comprises different groups of firing chambers, each group dedicated to a different ink. The barrier design is configured to a particular ink property such as viscosity, in order to provide similar ink refill characteristic for the different groups of firing chambers.Type: GrantFiled: May 13, 1997Date of Patent: June 19, 2001Assignee: Hewlett-Packard CompanyInventors: Todd A. Cleland, Robert C. Maze