Magnetic Patents (Class 347/53)
  • Patent number: 9176205
    Abstract: The present invention relates to a microfluidic chip for measuring the magnetic susceptibility of a superparamagnetic nanoparticle droplet and a method for measuring magnetic susceptibility using the same. According to the invention, the magnetic susceptibility of a superparamagnetic nanoparticle can be continuously and accurately measured in a flowing fluid using a microfluidic chip including microfluidic channels.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: November 3, 2015
    Assignee: The Industry & Academic Cooperation in Chungnam National University (IAC)
    Inventors: CheolGi Kim, IlGyo Jeong, Young-Jae Eu, KunWoo Kim, XingHao Hu, Brajalal Sinha
  • Patent number: 9068695
    Abstract: Magnetorheological (MR) antibubbles are used for fluid delivery. A method of transporting a substance in a fluid in accordance with the invention comprising the steps of forming an antibubble in the fluid, the antibubble containing the substance to be transported and magnetic or magnetizable particles, and guiding the antibubble through the fluid with a magnet. The particles are ferromagnetic, paramagnetic or diamagnetic, and the magnet is a permanent magnet or an electromagnet. The substance to be transported may include a reactant associated with a catalytic mechanism; a pigment; or a lubricant. The delivery system may include a substance or magnetic particles which are fluorescent.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: June 30, 2015
    Assignee: SMRT Delivery LLC
    Inventor: Justin E. Silpe
  • Patent number: 8960864
    Abstract: A nozzle unit for a printer that includes a sleeve having a guide path formed in the sleeve and through which ink passes, a nozzle hole seat arranged at one end of the sleeve and having a nozzle hole corresponding to the guide path, and a nozzle holder accommodating the sleeve and the nozzle hole seat, having an opening whose diameter is larger than a diameter of the nozzle hole of the nozzle hole seat so that the ink passing through the nozzle hole is externally discharged through the opening, and including a paramagnetic material.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: February 24, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Kyoung-Wook Min
  • Patent number: 8936352
    Abstract: A printer includes a nozzle hole plate including a plurality of nozzle holes, the nozzle hole plate being rotatable; and a nozzle part including a sleeve having a leading passage corresponding to one of the plurality of nozzle holes of the nozzle hole plate.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: January 20, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ye-Seul Na, Kyoung-Wook Min
  • Publication number: 20140218442
    Abstract: A method of printing with a magnetic ink includes ejecting a plurality of magnetic ink drops onto a print medium in a print zone and applying a magnetic field to the ink drops on the print medium. The magnetic field increases a viscosity of the magnetic ink drops and reduces or eliminates absorption of the magnetic ink into a porous print medium such as paper.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 7, 2014
    Applicant: XEROX CORPORATION
    Inventor: Michael D. Thompson
  • Patent number: 8789925
    Abstract: A method of printing with a magnetic ink includes ejecting a plurality of magnetic ink drops onto a print medium in a print zone and applying a magnetic field to the ink drops on the print medium. The magnetic field increases a viscosity of the magnetic ink drops and reduces or eliminates absorption of the magnetic ink into a porous print medium such as paper.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: July 29, 2014
    Assignee: Xerox Corporation
    Inventor: Michael D. Thompson
  • Patent number: 8789922
    Abstract: In one embodiment, a hammer bank for a line printer includes a back plate having a front surface, a back surface and a uniform thickness between the front and back surfaces. At least one hammer is disposed in front of the back plate. The at least one hammer is spring-biased for forward movement and away from the back plate and is releasably retained against such forward movement by a magnetic force acting rearwardly thereon. An elongated pole piece that is associated with the at least one hammer extends forwardly from the front surface of the back plate and is selectively operable to interrupt the magnetic force acting thereon.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: July 29, 2014
    Assignee: Printronix, Inc.
    Inventors: John W. Gemmell, Rohit Sharma, Rudy Concepcion, Jr.
  • Patent number: 8663511
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, a method for applying a force to at least one of an inner stream, an outer stream or both of a combined stream to produce a plurality of capsules, receiving image data, processing the image data, detecting undesirable capsules from the processed image data, applying a bias charge only to the detected undesirable capsules, and segregating the biased undesirable capsules from the unbiased desirable capsules. Additional embodiments are disclosed.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: March 4, 2014
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Kyekyoon Kim, Hyungsoo Choi
  • Patent number: 8657409
    Abstract: In one embodiment, a hammer bank for a line printer includes a back plate and a plurality of elongated pole pieces extending forwardly from a front surface thereof. Each of the pole pieces has an electrical coil disposed about a circumfery thereof. A permanent magnet has a back surface coupled to the front surface of the back plate, and a shunt fret defining a plurality of elongated, downwardly extending shunts has a back surface coupled to a font surface of the permanent magnet. A hammer fret defining a plurality of elongated, upwardly extending hammers has a back surface coupled to the front surface of the back plate. Each of the hammers is interdigitated between a pair of adjacent shunts. Each hammer includes an elongated spring portion having a hammer head disposed at an upper end thereof, and each hammer head has a forwardly projecting printing tip thereon.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: February 25, 2014
    Assignee: Printronix, Inc.
    Inventors: John W. Gemmell, Rohit Sharma, Rudy Concepcion
  • Patent number: 8470570
    Abstract: An apparatus for printing a biomolecular droplet onto a substrate using an electric charge concentration effect includes; an electric field forming electrode including an accommodating area in which the biomolecular droplet including micro magnetic beads is accommodated and a nozzle formed on an end of the accommodating area through which the biomolecular droplet is discharged, a substrate disposed below the electric field forming electrode, including a grounded target surface onto which the biomolecular droplet discharged from the nozzle of the electric field forming electrode is deposited, a magnet disposed below the substrate which applies a magnetic force on the micro magnetic beads, and an open circuit type voltage applying unit electrically connected to the electric field forming electrode which applies a charge to the electric field forming electrode which generates an electrical force which causes the biomolecular droplet to be ejected onto the target surface of the substrate.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: June 25, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kui-hyun Kim, Byung-chul Kim, Su-hyeon Kim
  • Patent number: 8467114
    Abstract: Disclosed is a system for printing an image comprising a plurality of pixels, the system comprising: a carriage arranged to make a plurality of passes along a scanning axis with respect to a print medium; a plurality of printheads mounted on the carriage, each printhead corresponding to a different ink color and comprising at least one ejection nozzle; and, a print controller configured to receive data defining for each pass zero or more locations at which to deposit each of the ink colors to produce each pixel; wherein the data is such that for at least one pixel, at least one of the ink colors is deposited at substantially more locations on one pass relative to the other passes.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: June 18, 2013
    Assignee: Hewlett-Packard Industrial Printing Ltd.
    Inventor: Igor Yakubov
  • Patent number: 8186807
    Abstract: A droplet ejection device includes a pressure chamber that includes a cavity surrounded by a side wall and a bottom wall, a deformable substrate that is provided above the pressure chamber to cover the cavity and that is parallel to the bottom wall, a magnetic body having an opening that is provided above the deformable substrate and that is fixed to the deformable substrate, and a coil that is disposed above the deformable substrate, that surrounds the magnetic body, and that is fixed to a fixing portion provided above the side wall.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: May 29, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Kijima, Minoru Usui
  • Patent number: 8100505
    Abstract: A liquid ejecting head includes a substrate, a nozzle forming member for forming on a principal surface of the substrate a nozzle comprising a flow passage of liquid and an orifice for ejecting the liquid, and a dummy pattern. The dummy pattern has substantially the same dimension as at least a part of the nozzle and is formed so that a cross-section of the dummy pattern is exposed at an end surface of the nozzle forming member.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: January 24, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomotsugu Kuroda, Toru Yamane, Mikiya Umeyama, Masaki Oikawa, Yuichiro Akama, Chiaki Muraoka, Keiji Tomizawa
  • Patent number: 7997697
    Abstract: A droplet discharge head including a nozzle substrate having nozzle openings, a cavity substrate having discharge chambers that communicate with the nozzle openings and discharge droplets from the nozzle openings, a reservoir substrate having a reservoir concave portion that serves as a reservoir which communicates commonly with the discharge chambers. The reservoir substrate is provided between the nozzle substrate and the cavity substrate and a resin thin film is formed on a whole inner face of the reservoir concave portion and on a bottom face of a second concave portion. The second concave portion is provided in a peripheral of the reservoir concave portion and has a depth which is smaller than the depth of the reservoir concave portion. The resin thin film is cut circularly so as to surround the reservoir concave portion, and a part of the resin thin film serves as a diaphragm buffering pressure variation. serves as a diaphragm buffering pressure variation.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: August 16, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Katsuji Arawaka, Kazufumi Oya
  • Patent number: 7980681
    Abstract: Disclosed are an ink-jet head and a manufacturing method thereof. The ink-jet head, which has a reservoir storing ink, a chamber being supplied with the ink from the reservoir, a restrictor connecting the reservoir to the chamber, and a nozzle discharging the ink, includes: a chamber plate, in which the chamber is formed; a vibration plate, which is laminated on an upper surface of the chamber plate to cover the chamber and in which a first coil is placed; a first middle plate, which is laminated on a lower surface of the chamber plate and in which the restrictor is formed, and a second coil is placed; and a lower plate part, which is laminated on a lower surface of the first middle plate and in which the reservoir and the nozzle are formed.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: July 19, 2011
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sang-Jin Kim, Jea-Woo Joung, Young-Seuck Yoo
  • Patent number: 7959263
    Abstract: The invention provides for a printhead integrated circuit for an inkjet printer. The printhead integrated circuit includes a wafer substrate defining a nozzle outlet port. The printhead integrated circuit also includes an electromagnetic piston inside the chamber, the piston mounted to the wafer substrate via torsion springs, said piston operatively forced towards the outlet port when activated. Also included is a solenoid coil positioned on the wafer substrate about the piston to activate the piston when a current is passed through the coil.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: June 14, 2011
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 7950773
    Abstract: An inkjet drop ejection apparatus includes a chamber defined by a plunger spaced from an ejection nozzle; and an actuator for moving the plunger towards the nozzle, the actuator including a magnetic plate and a solenoid coil provided circumferentially between the magnetic plate and the plunger, the solenoid coil for inducing a magnetic field in at least one of the magnetic plate and the plunger. The plunger has defined therethrough a series of apertures arranged around a circumference of the plunger, the apertures substantially mapping a locus of the solenoid coil.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: May 31, 2011
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Publication number: 20100271432
    Abstract: A circuit line forming device, including an inkjet head to eject a conductive ink onto one side of a substrate, the conductive ink containing nanoparticles including a ferromagnetic core and a conductive layer surrounding the ferromagnetic core; and a magnetic field generator part, positioned on the other side of the substrate in correspondence with the inkjet head, wherein the magnetic field generator part applies a magnetic field on the conductive ink, when the conductive ink is ejected to form circuit lines.
    Type: Application
    Filed: July 2, 2010
    Publication date: October 28, 2010
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: In-Keun Shim, Jae-Woo Joung
  • Patent number: 7802870
    Abstract: A scalable expandable spray ink printer machine for use with paper roll stock is disclosed. A series of three or four print heads are place serially in proximity to paper stock. The configuration of the cylindrical print head allows the heads to be expanded for printing on wider paper stock. The print heads include a combination of fixed, turning and sliding components to align or block ink flow from the print ink reservoir. The printer is in fixed position perpendicular to the travel direction and rotates internally on an axis parallel to the paper or media to be printed. The print head is sectional and lengthwise expandable in fixed unit lengths. The printing machine is ideally suited for advertising or other elongated print media. Due to the use of standard paper, roll stock and speed of the printing, signs can be printed on demand and displayed in real-time.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: September 28, 2010
    Inventor: Dwain Gipson
  • Publication number: 20100208000
    Abstract: A printhead that has an array of ink ejection nozzles, an array of chambers adapted to store ink for ejection through each of the nozzles respectively, a silicon substrate for supporting the array of chambers and defining a plurality of ink inlet channels for feeding ink to the array of chambers, the silicon substrate having a planar structure with one surface that supports the chambers and an opposing surface from which the elongate ink feed channels extend, a plurality of actuators, one of the actuators being positioned in each of the chambers respectively for ejecting drops of ink through the nozzle, a plurality of ink inlet channels connecting the ink feed channels to the array of chambers and, layers of CMOS drive circuitry supported on the silicon substrate.
    Type: Application
    Filed: April 22, 2010
    Publication date: August 19, 2010
    Inventor: Kia Silverbrook
  • Patent number: 7712679
    Abstract: The mist ejection head has: a nozzle plate in which a nozzle hole for ejecting liquid is formed; a liquid chamber connected to the nozzle hole; an ultrasonic wave generating device which applies an ultrasonic wave to the liquid in the liquid chamber; and a reflective wall which reflects the ultrasonic wave applied to the liquid, wherein: the reflective wall is disposed so as to oppose the nozzle plate and has an axially symmetrical shape comprising a portion of a parabolic surface, the portion including an apex of the parabolic surface and being on an apex side with respect to a focal point of the parabolic surface; an axis of the parabolic surface passes through the nozzle hole; and the focal point of the parabolic surface is positioned in a vicinity of the nozzle hole.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: May 11, 2010
    Assignee: Fujifilm Corporation
    Inventor: Sho Onozawa
  • Publication number: 20100053275
    Abstract: An inkjet drop ejection apparatus includes a chamber defined by a plunger spaced from an ejection nozzle; and an actuator for moving the plunger towards the nozzle, the actuator including a magnetic plate and a solenoid coil provided circumferentially between the magnetic plate and the plunger, the solenoid coil for inducing a magnetic field in at least one of the magnetic plate and the plunger. The plunger has defined therethrough a series of apertures arranged around a circumference of the plunger, the apertures substantially mapping a locus of the solenoid coil.
    Type: Application
    Filed: November 10, 2009
    Publication date: March 4, 2010
    Inventor: Kia Silverbrook
  • Patent number: 7669970
    Abstract: An ink nozzle unit is provided for an inkjet printhead. The nozzle unit includes a substrate assembly. A nozzle extends from the substrate assembly. The nozzle defines an internal nozzle chamber and an ink ejection portal through which ink supplied to the nozzle chamber can be ejected. A magnetic field generator is configured to generate a magnetic field passing though the nozzle chamber. A paddle is movably mounted within the nozzle chamber and includes at least one solenoid coil. An actuator is configured to activate the solenoid coil so that the paddle moves and ejects ink within the nozzle chamber out through the ink ejection portal.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: March 2, 2010
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Publication number: 20090262164
    Abstract: A developer supply device, includes: a developer holder; and a developer reservoir which is disposed inside of the developer holder, holds a liquid developer, and has at least one supply section that supplies the liquid developer from the developer reservoir to the developer holder, the liquid developer including a toner and an aqueous medium, and the developer supply device supplying the liquid developer that has been supplied to the developer holder to a medium which is a supply target for the liquid developer.
    Type: Application
    Filed: December 16, 2008
    Publication date: October 22, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Keitaro Mori, Ryosaku Igarashi, Yasuaki Watanabe
  • Publication number: 20090219343
    Abstract: An actuator includes a deformable substrate, a magnetic body having an opening, provided above the substrate, and a coil that is disposed above the substrate and surrounds the magnetic body.
    Type: Application
    Filed: February 26, 2009
    Publication date: September 3, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takeshi KIJIMA, Minoru USUI
  • Publication number: 20090185007
    Abstract: A printhead that has an array of ink ejection nozzles, an array of chambers adapted to store ink for ejection through each of the nozzles respectively, a plurality of ink inlet channels for feeding ink the array of chambers, and a plurality of actuators, one of the actuators being positioned in each of the chambers respectively for ejecting drops of ink through the nozzle. A plurality elongate ink feed channels is connected to the ink inlet channels. Each of the ink inlet channels is long and narrow relative to the dimensions of the chamber such that ink in said chamber is restricted from flowing out during ink drop ejection by viscous drag generated by the ink inlet channel. This enhances the droplet ejection efficiency as less of the pressure pulse generated by the actuator is lost to ink back flow.
    Type: Application
    Filed: March 3, 2009
    Publication date: July 23, 2009
    Inventor: Kia Silverbrook
  • Patent number: 7328975
    Abstract: An inkjet drop ejection apparatus 1010 having a chamber 1012 with a nozzle 1011; and an actuator with a thermal bend arm 1034. The arm has a cold portion 1024 and a hot portion 1022 such that thermal expansion of the hot portion bends the arm. The cold portion is positioned for greater exposure to ink flow than the hot portion. The heat generated by the hot portion of the thermal bend arm can heat up the cold portion. As the cold portion heats, it expands thereby forcing the hot portion to heat to a higher temperature to achieve the same expansion differential that provides the required bend in the arm. By positioning the cold portion for greater exposure to the ink flow, it dissipates heat to the ink and its temperature is more stable. This in turn improves the efficiency of the arm and the entire printhead.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: February 12, 2008
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 7275802
    Abstract: Embodiments of a cleaner are disclosed.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: October 2, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Berardelli, Antoni Murcia
  • Patent number: 7204581
    Abstract: A magnetostatic actuator uses a ferrofluid slug confined in a cylindrical tube which is wrapped in a conducting coil. By applying a current to the coil, a magnetic field is generated inside the coil. The ferrofluid slug may be attracted to the interior of the coil by the interaction of its magnetic moment with the field generated inside the coil. Movement of the ferrofluid slug in response to the magnetic field may be used to actuate various devices, such as a droplet dispenser.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: April 17, 2007
    Assignee: Palo Alto Research Center, Incorporated
    Inventor: Eric Peeters
  • Patent number: 7134608
    Abstract: An inkjet printhead with an array of ink ejectors 1 for printing onto a media substrate, each ink ejector 1 having a chamber 2 for holding ink 3, a nozzle 11 and an actuator 5 for movement within the chamber 2; such that, movement of the actuator 5 in one direction forces a quantity of ink out of the chamber 2 and towards the media substrate and subsequent movement of the actuator 5 in an opposing direction assists the quantity of ink to form a droplet 18.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: November 14, 2006
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 7007859
    Abstract: A method of operating a liquid ejection device including a fluid chamber having a fluid outlet port in a wall of the chamber; a fluid inlet port in a wall of the chamber and a paddle located in the chamber, the paddle including a fluid directing means; the method including urging the paddle from a first position to a second position to cause ink to flow out of the outlet and thereby cause a meniscus to bulge, the motion causing the fluid directing means to direct fluid away from the inlet and urging the paddle from the second position to a first position to cause the meniscus to break thereby ejecting ink from the outlet.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: March 7, 2006
    Assignee: Silverbrook Research PTY LTD
    Inventor: Kia Silverbrook
  • Patent number: 7008045
    Abstract: A liquid drop discharger includes a coil for generating a magnetic field based on an electric current that is applied; a moving section, removably disposed with respect to the coil so as to be movable in a central axial direction of the coil, for generating an induced current by the magnetic field generated by the coil; device for vertically applying a magnetic field to a peripheral surface of a peripheral member, where the induced current is generated, of the moving section; and a discharge opening, which moves together with the moving section, for discharging a liquid by changing the volume of a liquid chamber containing the liquid as a result of the movement of the moving section.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: March 7, 2006
    Assignee: Sony Corporation
    Inventors: Isamu Nakao, Tsutomu Ishimoto, Masaru Uryu, Yoshio Ohashi, Takao Kondo, Motohiro Furuki, Masanobu Yamamoto
  • Patent number: 6988784
    Abstract: Microelectromechanical pagewidth printheads include a very large number of ink ejection nozzles fabricated upon a silicon wafer. Ink stored in the printhead subsequent to a printing operation is vulnerable to becoming undesirably viscous thereby causing inconsistent printing. In order to address this problem the present invention provides a printhead recapping mechanism. The mechanism includes a base portion, that includes a solenoid coil and a movable capping portion which incorporates magnetically attractive material responsive to the coil. A spring biases the capping portion to a quiescent capping position when the printhead is not in use. During printing operations a current is applied to the solenoid coil to overcome the biasing spring and draw the capping portion from the capping position.
    Type: Grant
    Filed: January 3, 2005
    Date of Patent: January 24, 2006
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 6913345
    Abstract: A method of firing a plurality of jetting heaters in an ink jet printer includes identifying a first of the jetting heaters to be fired. A second of the jetting heaters to be fired immediately after the firing of the first jetting heater is also identified. Power is simultaneously applied to each of the first jetting heater and the second jetting heater.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: July 5, 2005
    Assignee: Lexmark International, Inc.
    Inventors: George Keith Parish, Kristi Maggard Rowe
  • Patent number: 6789880
    Abstract: A microinjector uses bubbles as virtual valves to eject droplets of different sizes. The microinjector is in fluid communications with a reservoir and has a substrate, an orifice layer, and a plurality of nozzles. The substrate has a manifold for receiving ink from the reservoir. The orifice layer is positioned on the top of the substrate so that a plurality of chambers are formed between the orifice layer and the top of the substrate. Each of the nozzles has an orifice and at least three bubble generating components. The bubble generating components are selectively driven by a driving circuit so that each nozzle can eject droplets of different sizes.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: September 14, 2004
    Assignee: BenQ Corporation
    Inventors: Chung-Cheng Chou, Tsung-Ping Hsu, In-Yao Lee, Wei-Lin Chen, Hung-Sheng Hu
  • Patent number: 6601942
    Abstract: A ferro-fluidic inkjet printhead sealing and spitting system is provided for maintaining inkjet printhead health, prior to and after installation in an inkjet printing mechanism. As a ferro-fluidic capping system for sealing printhead nozzles which eject ink having either polar properties or non-polar properties, the system includes a support structure engageable with the printhead, and a magnetic element supported by the support structure. A ferro-fluidic fluid overlays the magnetic element to seal against the printhead nozzles when the support structure is engaged with the printhead. The ferro-fluidic fluid has polar properties when the ink has non polar properties, and non-polar properties when the ink has polar properties. The ferro-fluidic fluid may be used to receive ink spit from the printhead, or when used with an adhesive tape, to protect an inkjet cartridge during shipping. An inkjet printing mechanism having such a ferro-fluidic system, along with associated methods are also provided.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: August 5, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Bret K. Taylor, Jefferson P. Ward, Dawn M. Beachnau Hood
  • Publication number: 20030052945
    Abstract: The invention relates to a structure comprising a sequence of elements (t) for sending or receiving a signal along an axis. Two successive elements (t) along the direction of the axis are offset with respect to each other along the direction perpendicular to the axis. The structure comprises at least two layers of material (K1, K2) deposited on a reception substrate (S1) using the layer transfer technique.
    Type: Application
    Filed: October 10, 2002
    Publication date: March 20, 2003
    Inventors: Francois Baleras, Gilles Poupon, Bernard Aspar
  • Publication number: 20030030699
    Abstract: Disclosed are an electrification apparatus and an image forming apparatus which reduce ozone generation, provide uniform electrification of a photosensitive body, and have high durability. This electrification apparatus comprises: a first magnet means composed of a magnetized base body obtained by magnetizing a base body of the photosensitive body drum or a magnet configured inside of the base body of the photosensitive body drum; a second magnet means magnetically levitated outside of the photosensitive body drum by the first magnet means; and a discharge electrode firmly attached to a face of the second magnet means opposed to the photosensitive body surface, the discharge electrode having a predetermined distance to the photosensitive body surface.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 13, 2003
    Inventors: Minoru Matsuo, Shigeharu Nakamura
  • Patent number: 6345882
    Abstract: This invention relates to a magnetographic printing process consisting of creating magnetized recorded dots on a surface of a magnetic recording element (3) by at least one elementary magnetic head (2), spraying ink particles on each of the magnetized recorded dots in order to form images composed of image dots, and increasing the energy supplied to the first magnetized recorded dots compared with the energy supplied to other magnetized dots. This invention also relates to a magnetographic printer using the said process.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: February 12, 2002
    Assignee: Nipson SA
    Inventor: Pascal Brechat
  • Publication number: 20020005876
    Abstract: An apparatus for dispersing a first plurality of conductive elongated nano-elements distributed within a carrier-fluid to assemble a conductive device made of a first charge-receptive area of a support surface to which at least one nano-element has attached, including: a nozzle through which the elongated nano-elements are directed such that the nano-elements pass through an electromagnetic field for imparting a preselected charge thereto, and toward at least the first charge-receptive area. The charge-receptive area is given a charge such that it attracts a first end-portion of one of the nano-elements. Also, a method of assembling a conductive device.
    Type: Application
    Filed: April 7, 2001
    Publication date: January 17, 2002
    Inventors: Craig A. Grimes, Elizabeth Dickey
  • Patent number: 6328411
    Abstract: A ferro-fluidic inkjet printhead sealing and spitting system is provided for maintaining inkjet printhead health, prior to and after installation in an inkjet printing mechanism. As a ferro-fluidic capping system for sealing printhead nozzles which eject ink having either polar properties or non-polar properties, the system includes a support structure engageable with the printhead, and a magnetic element supported by the support structure. A ferro-fluidic fluid overlays the magnetic element to seal against the printhead nozzles when the support structure is engaged with the printhead. The ferro-fluidic fluid has polar properties when the ink has non polar properties, and non-polar properties when the ink has polar properties. The ferro-fluidic fluid may be used to receive ink spit from the printhead, or when used with an adhesive tape, to protect an inkjet cartridge during shipping. An inkjet printing mechanism having such a ferro-fluidic system, along with associated methods are also provided.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: December 11, 2001
    Assignee: Hewlett-Packard Company
    Inventors: Bret K. Taylor, Jefferson P. Ward, Dawn M. Beachnau Hood
  • Patent number: 6315914
    Abstract: A method of manufacture of an ink jet print head arrangement is disclosed including a series of nozzle chambers, the method comprising the steps of: (a) utilizing an initial semiconductor wafer having an electrical circuitry layer formed thereon on; (b) etching a series of slots in at least the circuitry layer to define a nozzle cavity inlet; (c) depositing and etching a first layer of magnetic flux material on the electrical circuitry layer to define a first magnetic plate; (d) depositing and etching a insulating layer on the first layer and the electrical circuitry layer, the etching including etching vias for a subsequent conductive layer; (e) depositing and etching a conductive layer in for form of a conductive coil conductively interconnected to the electrical circuitry layer; (f) depositing and etching a hydrophobic material layer in the region of the conductive coil; (g) depositing and etching a sacrificial material layer in the region of the first magnetic plate and the coil, the etching including def
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: November 13, 2001
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 6299786
    Abstract: A method of manufacturing an ink jet printhead includes providing a substrate. A doped layer is deposited on the substrate and is etched to create an array of nozzles on the substrate with a nozzle chamber in communication with each nozzle. Planar monolithic deposition, lithographic and etching processes are used to form a plunger arranged reciprocally within each nozzle chamber to be displaceable towards and away from the nozzle to effect ink ejection and nozzle chamber refill, respectively, and an actuator arranged externally of the nozzle chamber to effect reciprocation of the plunger.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: October 9, 2001
    Inventor: Kia Silverbrook
  • Patent number: 6267905
    Abstract: This patent describes a method of manufacturing a permanent magnet electromagnetic ink jet print head wherein an array of nozzles are formed on a substrate utilising planar monolithic deposition, lithographic and etching processes. Multiple ink jet heads are formed simultaneously on a single planar substrate such as a silicon wafer. The print heads can be formed utilising standard VLSI/ULSI processing and can include integrated drive electronics formed on the same substrate. The drive electronics preferably being of a CMOS type. In the final construction, ink can be ejected from the substrate substantially normal to the substrate plane.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: July 31, 2001
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 6120133
    Abstract: There is provided a magnetic ink jetting apparatus which, when magnetic ink is jetted from an ink jet apparatus, uniformly mixes the pigment and liquid of the magnetic ink and jets it. The magnetic ink jetting apparatus for jetting the magnetic ink with a uniform mixture of pigment and liquid includes a plurality of ink chamber barriers forming an ink chamber for receiving the magnetic ink, and a magnetic layer creating magnetism in the ink chamber so as to concentrate the pigment of the magnetic ink, the magnetic layer being formed between the plurality of ink chamber barriers.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: September 19, 2000
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Byung-Sun Ahn
  • Patent number: 5808637
    Abstract: A ferromagnetic ink is formed by a dispersion of ferromagnetic particles mixed with an ink base. Drops of the ink are ejected from an inkjet printhead to print characters or markings onto a print media sheet. To resist clogging printhead nozzles, the dispersed ferromagnetic particles have an average diameter equal to or less than approximately 1/10 of the average nozzle diameter. A magnetic field is applied to the ejected ink drops during printing to direct, or more specifically bias, the ink drops toward the print media. The magnetic "biasing" force aids in maintaining drop shape along the ejection path, and in reducing bounce. As a result, edge roughness and spray are decreased so as to improve print quality. In alternative embodiments, the magnetic field source is formed by a permanent magnet or electromagnet. Such a field source is integral to or adjacent to a printer platen. The field source is located adjacent to the printhead and in several embodiments extends along the scan path of the printhead.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: September 15, 1998
    Assignee: Hewlett-Packard Company
    Inventors: Donald E. Wenzel, David E. Hackleman
  • Patent number: 5517223
    Abstract: An inkjet printing method and apparatus in which an ejecting head is rotated to selectively eject ink by centrifugal force. The viscosity of ink is varied electrically or magnetically. The method and apparatus requires no additional heater, piezoelectric element or compressor, thereby simplifying the structure and reducing the production cost of the printer.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: May 14, 1996
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyu-cheol Shin
  • Patent number: 5511477
    Abstract: A method and apparatus for direct production of photopolymeric printing plates. The method comprises forming a positive and/or negative image on a substrate by ink-jet printing with a photopolymeric ink composition, optionally preheated. The apparatus for carrying out the method of the invention comprises a rotatable drum adapted for retaining on its inner or outer surface the substrate to be printed; a carriage, displaceable axially in respect of the drum; a container for a photopolymeric ink composition; at least one nozzle communicating with the carriage for ejecting the photopolymeric ink composition; and a UV source located so as to expose the printed surface of the substrate to UV radiation.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: April 30, 1996
    Assignee: Idanit Technologies, Ltd
    Inventors: Uri Adler, Ori Miller
  • Patent number: 5337078
    Abstract: An apparatus for recording information carried by an electro-magnetic radiation beam. The apparatus has a recording unit having two electrodes, a photoconductive member and a recording member of liquid crystals capable of holding electric charges, the members being arranged so as to face each other between the electrodes. An electro-magnetic radiation beam carrying information to be recorded is directed to the photoconductive member under presence of a voltage across the electrodes. An electric field corresponding to a conductivity variation of the photoconductive member according to the information is thus applied to the recording member to form a charge latent image corresponding to the information on the recording member. The recording member is then heated so that an intensity of the applied electric field exceeds a specific threshold level at which an optical characteristic of the liquid crystal begins to vary according to the charge latent image.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: August 9, 1994
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Yoshihisa Koyama, Yuji Uchiyama