With Electric Field Ejection (applied To Fluid) Patents (Class 347/55)
  • Patent number: 10457821
    Abstract: An aqueous inkjet ink includes at least water, a coloring material, a water-soluble organic solvent component, a surfactant, and resin microparticles. The water-soluble organic solvent component includes a first monool-type solvent represented by R1O(CH2CH2O)mH in which R1 represents a straight or branched alkyl group having 1 to 4 carbon atoms, and m represents an integer of 2 or 3, a second monool-type solvent represented by R2O(C3H6O)nH where R2 represents a straight or branched alkyl group having 1 to 4 carbon atoms, and n represents an integer of 2 or 3, and a third monool-type solvent that is at least one selected from the group consisting of 3-methoxy-1-butanol and 3-methoxy-3-methyl-1-butanol. The content of the third monool-type solvent in the ink is about 8% by mass or greater and about 27% by mass or less. The content of the first monool-type solvent in the ink is about 0.5% by mass or greater and about 9% by mass or less. The content of the second monool-type solvent in the ink is about 0.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: October 29, 2019
    Assignee: ROLAND DG CORPORATION
    Inventors: Shinji Tabuchi, Aoi Tanaka
  • Patent number: 10457079
    Abstract: An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes an organic solvent and a coloring material, and the image recorded matter has a tackiness power of from 80 to 110 nN.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 29, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kaori Toyama, Yuuki Yokohama, Hiromi Sakaguchi, Hideaki Nishimura, Masayuki Fukuoka, Shuusuke Someno
  • Patent number: 10207505
    Abstract: A method of fabricating a charging device for an inkjet printing system includes providing a charging device body having at least one conductive trace passing through the interior of the charging device body connecting between a charging face of the charging device body and an interconnection region remote from the charging face. A portion of the at least one conductive trace is exposed on the charging face. A vapor deposition process is used to deposit a conductive base layer through a shadow mask onto the charging face, wherein the deposited conductive base layer contacts the exposed portion of at least one conductive trace. One or more conductive metallic layers are plated onto the deposited conductive base layer to form a charging electrode.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: February 19, 2019
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Robert J. Simon, Michael Frank Baumer, James E. Harrison, Jr., Brian George Morris, Charles D. Rike
  • Patent number: 10201970
    Abstract: The liquid ejection head includes a wall member having formed therein a void for communicating between a first liquid chamber and a second liquid chamber; a first energy generation element to eject the liquid in the first liquid chamber; a second energy generation element to eject the liquid in the second liquid chamber; a first electrode arranged in a vicinity of the first energy generation element in the first liquid chamber; a second electrode for forming, between the first electrode and the second electrode, an electric field in liquid inside the first liquid chamber; and a supply port which supplies liquid to the first energy generation element. The wall member includes a channel wall defining a channel through which the second liquid chamber, the void, and the supply port communicate, and the second electrode is arranged between the second liquid chamber and the supply port in the channel.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: February 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akio Goto, Yoshinori Misumi, Maki Kato, Norihiro Yoshinari, Yuzuru Ishida, Takahiro Matsui
  • Patent number: 10093100
    Abstract: A liquid ejecting apparatus includes a liquid ejecting portion which has a nozzle that ejects liquid, and a flushing receptive body which receives the liquid that is ejected in a flushing operation in which the liquid is ejected from the nozzle, the flushing receptive body including a receiving member that is able to receive the liquid, a receiving member holding portion which holds the receiving member, and a fixing member with conductivity that fixes the receiving member to the receiving member holding portion by contacting the receiving member and has a mesh form portion that forms an adhesion surface to which the ejected liquid is adhered with the receiving member in the flushing operation, in which the fixing member is electrically grounded.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: October 9, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Koji Harada, Shigeki Suzuki, Kinya Ozawa, Hitotoshi Kimura
  • Patent number: 9969158
    Abstract: An electrospray emitter (10) for emitting a liquid comprising a sheet (40) having a channel (65) opening to an aperture (55) on a flat emitter surface extending across the sheet (40). A charging electrode (80) coupleable to an electrical supply and arranged to apply an electrical charge to liquid passing into the channel (65). A control electrode (50) proximal to the channel (65) for controlling electrospray emission, that may be embedded in the sheet. A non-wetting or insulating layer (30) may be applied to the sheet.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: May 15, 2018
    Assignee: QUEEN MARY & WESTFIELD COLLEGE
    Inventors: John Stark, Mark Richard Shepherd
  • Patent number: 9878493
    Abstract: The disclosed spray deposition systems and methods use spray charging and discharging techniques to assist with digital deposition of spray droplets on a substrate. For example, the disclosed systems and methods have a charging system that generates spray droplets from a spray generator and charges the droplets. Focusing electrodes help to collimate the droplets into a tight droplet stream and, optionally, steering electrodes help direct the tight droplet stream. A charge removal system neutralizes or removes the charge from the droplets, either during the deposition of the droplets on a substrate or after the droplets have been deposited on a substrate.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: January 30, 2018
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: John Steven Paschkewitz, Eric Shrader, Victor Beck
  • Patent number: 9857732
    Abstract: A developing device includes a developing roller and a conveyor roller. The developing roller includes a first magnet. The conveyor roller includes a second magnet. The first magnet includes a first magnetic pole and a second magnetic pole. The second magnet includes a third magnetic pole and a fourth magnetic pole. The first and fourth magnetic poles are magnetic poles having the same polarity. One of the second and third magnetic poles is a magnetic pole having the same polarity as the first magnetic pole. The other of the second and third magnetic poles is a magnetic pole having a polarity different from the first magnetic pole. The developer is transferred from the conveyor roller to the developing roller by the third and second magnetic poles. The developer is transferred from the developing roller to the conveyor roller by the first and fourth magnetic poles.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: January 2, 2018
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Tamotsu Shimizu, Kenichi Tamaki
  • Patent number: 9789716
    Abstract: An ink jet printer includes a cleaning blade that cleans the surface of a transport belt that attracts a sheet of recording paper by electrostatic adsorption and transports the attracted recording paper, and a pressing roller. The width of the cleaning blade is smaller than the width of the pressing roller that is located downstream of the cleaning blade, and thus, ink, paper dust, and the like that have escapes from both ends of the cleaning blade to the outside and have not been wiped off are caught by the pressing roller.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: October 17, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Satoshi Chiba
  • Patent number: 9776916
    Abstract: In various aspects, the processes disclosed herein may include the steps of inducing an electric field about a non-conductive substrate, and depositing functionalized nanoparticles upon the non conductive substrate by contacting a nanoparticle dispersion with the non-conductive substrate, the nanoparticle dispersion comprising functionalized nanoparticles having an electrical charge, the electric field drawing the functionalized nanoparticles to the non-conductive substrate. In various aspects, the related composition of matter disclosed herein comprise functionalized nanoparticles bonded to a surface of a non-conductive fiber, the surface of the non-conductive fiber comprising a sizing adhered to the surface of the non-conductive fiber. This Abstract is presented to meet requirements of 37 C.F.R. §1.72(b) only. This Abstract is not intended to identify key elements of the processes, and related apparatus and compositions of matter disclosed herein or to delineate the scope thereof.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: October 3, 2017
    Assignee: UNIVERSITY OF DELAWARE
    Inventor: Erik Thostenson
  • Patent number: 9757745
    Abstract: A system capable of depositing a matrix film containing a low amount of impurities (e.g. neutral particles) is provided. The system includes: a first plate electrode 120 having an attachment surface on which a sample plate P is to be attached; a second plate electrode 130 arranged so as to face the attachment surface; a nozzle 110 for spraying a liquid containing a matrix substance into the space between the two electrodes 120 and 130 by an electrospray method, the nozzle 110 arranged so that none of the electrodes 120 and 130 lies on the central axis A of a spray flow of the liquid; and an electric field creator 140 for creating, between the two electrodes 120 and 130, an electric field for forcing electrically charged droplets contained in the spray flow of the liquid containing the matrix substance to move toward the attachment surface.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: September 12, 2017
    Assignee: SHIMADZU CORPORATION
    Inventor: Kazuteru Takahashi
  • Patent number: 9630205
    Abstract: An electrostatic application apparatus 100 comprises a tubular electrode 1 forming a first flow path F1 whose inner surface is formed of an electrically conductive wall; a counter electrode 20 placed to block an extension of an axis line of the first flow path F1; a power source 30 applying a voltage between the tubular electrode 1 and the counter electrode 20, and a liquid supply unit 40 supplying a liquid to the first flow path F1. If an axial length of the first flow path F1 is L1 and an inside diameter of the first flow path F1 is D1, then L1/D1 is 35 or more, the inside diameter D1 of the first flow path is 0.5 to 2.0 mm, and the length L1 of the first flow path is 20 to 100 mm.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: April 25, 2017
    Assignee: Nagase Techno-Engineering Co., Ltd.
    Inventor: Tsutomu Ueno
  • Patent number: 9616667
    Abstract: An inkjet head including a substrate configured to discharge ink including a supporting surface formed of a resin material and configured to support the substrate, the supporting substrate including a portion continuing to a surface intersecting the supporting surface and forming a corner portion, the portion forming the corner portion including a non surface treated area which is not surface treated, the supporting surface including a portion adjacent to the non surface treated area being surface treated areas which is surface treated, wherein the substrate and the supporting surface are bonded via an adhesive agent disposed in the non surface treated area and the surface treated area.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: April 11, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kyosuke Toda
  • Patent number: 9547236
    Abstract: A patterning apparatus is provided. The patterning apparatus includes a plurality of liquid jet units arranged in one or more groups and configured to jet an anti-etching liquid onto a surface of a substrate. The patterning apparatus also includes a plurality of exposure units configured to expose light on the anti-etching liquid jetted on the surface of the substrate to heat and cure the jetted anti-etching liquid to form anti-etching patterns on the surface of the substrate. Further, the patterning apparatus includes a control unit configured to control motion status and jetting status of the plurality of liquid jet units and motion status and exposure status of the plurality of exposure units, so as to form the anti-etching patterns at a predetermined line width and thickness.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: January 17, 2017
    Assignee: SEMICONDUCTOR MANUFACTURING INTERNATIONAL (SHANGHAI) CORPORATION
    Inventors: Qiang Wu, Huayong Hu, Chang Liu, Jianhua Ju, Charles Kwok Fung Lee
  • Patent number: 9475327
    Abstract: The transfer inkjet printer device includes an intermediate transfer body including an intermediate transfer surface capable of moving along a rotation route; an inkjet head used to discharge ink including toner particles onto the intermediate transfer surface at a first area in the rotation route in a state where the toner particles are charged, so as to form an intermediate image composed of an ink layer on the intermediate transfer surface; a pressure device used to press the ink layer of the intermediate image on the intermediate transfer surface, onto a surface of a recording medium at a second area in the rotation route; and an electric field application device used to electrophorese the charged toner particles in the ink layer of the intermediate image toward the recording medium at the second area.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: October 25, 2016
    Assignee: Miyakoshi Printing Machinery Co., Ltd.
    Inventors: Hideo Izawa, Takao Namiki, Junichi Setoyama
  • Patent number: 9475281
    Abstract: A method of reducing and/or preventing the accumulation of concentrated ink at an ejection point of a printhead of an electrostatic inkjet printer when ink is not being ejected at the ejection point, the method comprising reversing the electric field at the ejection point of the printhead during a non-printing phase of operation to reduce the concentration of ink at the ejection point.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: October 25, 2016
    Assignee: Tonejet Limited
    Inventors: Andrew John Clippingdale, Jr., Ammar Lecheheb, John Lawton Sharp
  • Patent number: 9475013
    Abstract: The present invention generally relates to systems and methods for creating droplets. In one aspect, a plurality of droplets (27) is introduced into a continuous fluid stream (21) to cause the continuous fluid stream to form discrete droplets. In some cases, the droplets that are formed from the continuous fluid stream may be substantially monodisperse. The continuous fluid stream may, in some cases, be a jetting fluid stream flowing at a relatively high linear flow rate, and in certain embodiments, high rates of droplet formation from the jetting fluid may thereby be achieved. Additionally, certain aspects of the invention are generally directed to devices, such as microfluidic devices, able to form such droplets.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: October 25, 2016
    Assignee: President and Fellows of Harvard College
    Inventors: Adam R. Abate, David A. Weitz
  • Patent number: 9370864
    Abstract: A compliant micro device transfer head and head array are disclosed. In an embodiment a micro device transfer head includes a spring portion that is deflectable into a space between a base substrate and the spring portion.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: June 21, 2016
    Assignee: Apple Inc.
    Inventors: Andreas Bibl, John A. Higginson, Hsin-Hua Hu
  • Patent number: 9346270
    Abstract: A liquid ejecting head includes a pressure chamber substrate where a plurality of spaces to be a pressure chamber along a Y direction are formed in an X direction, a vibration plate that seals the space by being stacked in the pressure chamber substrate, and a piezoelectric element and a supporting unit that are stacked in the vibration plate on an opposite side to the pressure chamber substrate, in which positions at one end in the Y direction are different from each other in a first space and a second space among the plurality of spaces, and the supporting unit suppresses a vibration of the vibration plate by being formed so as to overlap with at least the one end side portion in the first space in a planar view.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: May 24, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Motoki Takabe, Eiju Hirai, Yoichi Naganuma, Shunya Fukuda, Akira Miyagishi
  • Patent number: 9298124
    Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: March 29, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Go Araki, Norihito Naito
  • Patent number: 9266344
    Abstract: An ink jet print head with an integrated ink handling unit includes a heater and a filter for the ink. The ink handling unit has an inlet port for liquid ink and a circulation system connected to the inlet port and adapted to pass the liquid ink through the heater and to the filter. The circulation system includes a single, non-branched duct that passes continuously from the inlet port to the filter, and the duct of the circulation system passes in meander fashion through a heated block of the heater.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: February 23, 2016
    Assignee: OCÉ-TECHNOLOGIES B.V.
    Inventor: Marco T. R. Moens
  • Patent number: 9235188
    Abstract: A cartridge is attached to or detached from a main body of an image forming apparatus that has an opening portion and a door that opens or closes the opening portion. The cartridge includes: a memory unit with a contact portion via which the cartridge is connected to the main body to transmit information of the cartridge to the main body; and a moving member on which the contact portion is mounted, wherein the moving member is moved to a first position where the contact portion is hidden inside the cartridge and a second position where the contact portion protrudes out of the cartridge to be connected to a connection portion provided in the main body, the moving member being moved to the second position in connection with closing of the door.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: January 12, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-won Moon, Joon-hee Kim, Oh-dug Kwon, Ho-jin Jang
  • Patent number: 9186892
    Abstract: A liquid jet head includes base plates, a first actuator plate and a second actuator plate separately arranged on one principal planes of the base plates, and configured to jet a liquid, first extracting electrodes electrically connected to first drive electrodes, on the one principal plane of the first base plate, and second extracting electrodes electrically connected to second drive electrodes, on the one principal plane of the second base plate. The second extracting electrodes are pulled out on the one principal plane through through holes formed in the base plates.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: November 17, 2015
    Assignees: SII PRINTEK INC., SEIKO INSTRUMENTS INC.
    Inventors: Satoshi Horiguchi, Tokio Tatsumi
  • Patent number: 9192039
    Abstract: A radiation source having a nozzle configured to direct a stream of fuel droplets along a trajectory towards a plasma formation location, a laser configured to direct laser radiation at the fuel droplets at the plasma formation location to generate, in use, a radiation generating plasma. The nozzle has an internal surface that is configured to prevent contamination present in fuel used to form the fuel droplets from being deposited on that internal surface.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: November 17, 2015
    Assignee: ASML Netherlands B.V.
    Inventors: Antonius Theodorus Wilhelmus Kempen, Erik Roelof Loopstra, Corne Rentrop, Dennis De Graaf, Frits Gubbels, Gregory Richard Hayes, Hubertus Johannes Van De Wiel
  • Patent number: 9150020
    Abstract: A liquid droplet discharge apparatus that discharges liquid droplets finely and stably and includes a liquid droplet discharge unit and a voltage applying unit that is connected to the liquid droplet discharge unit, the liquid droplet discharge unit includes a nozzle and a tube that surrounds the nozzle, and the nozzle and the tube are coated with metal.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: October 6, 2015
    Assignees: Samsung Display Co., Ltd., Unist Academy-Industry Research Corporation
    Inventors: Dae-Young Lee, Hyang-Shik Kong, Jung Gun Nam, Gug Rae Jo, Hyung Bin Cho, Byeong Wan Ahn, Jan Ung Park
  • Patent number: 9114609
    Abstract: An inkjet printer includes an electrode in either a printhead or an image receiving member that is operatively connected to a waveform generator. During operation, a controller operates the waveform generator to generate an electrostatic field between the printhead and the image receiving member during operation of inkjets in the printhead to eject ink drops. The controller operates the waveform generator to reduce an amplitude of the electrostatic field while the ink drops travel toward the image receiving member during a time when satellite ink drops can be formed from the ejected ink drops. The controller subsequently operates the waveform generator to generate the electrostatic field while the ink drops are in flight after formation of the satellite to accelerate the ink drops and satellites towards the image receiving member.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: August 25, 2015
    Assignee: Xerox Corporation
    Inventors: Jeffrey J. Folkins, Jing Zhou, Richard P. Germain
  • Patent number: 9073322
    Abstract: An electrostatic actuator array including a plurality of recesses within an actuator membrane and a method for forming same. In an embodiment, a width of each recess is wider than a width of each bonding feature of a plurality of bonding features, and each bonding feature extends into one of the recesses. In another embodiment, a width of each recess is narrower than a width of each bonding feature. In each embodiment, adhesive within the recesses bonds the membrane to the bonding feature. The recesses provide a flow path for the adhesive to reduce or prevent adhesive encroachment into an air chamber within which an actuator electrode is located.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: July 7, 2015
    Assignee: XEROX CORPORATION
    Inventors: Peter J. Nystrom, Gary D. Redding
  • Patent number: 9073314
    Abstract: An electrohydrodynamic printing system includes a nozzle that dispenses a printing fluid and a substrate support. The nozzle includes a conductive portion. A voltage source applies a voltage differential between the conductive portion of the nozzle and the substrate support. A controller is configured to provide a burst mode waveform to the voltage source such that a drop of the printing fluid is caused to form from the conductive nozzle and travel toward the substrate support.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: July 7, 2015
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Michael J. Motala, Giuseppe Farruggia
  • Patent number: 9028026
    Abstract: Provided herein is an apparatus for printing on a 3-dimensional surface using electrohydrodynamic force, the apparatus having a stage where a print object is placed; a shape obtainer storing surface information of the print object; a nozzle receiving ink and discharging the received ink to a surface side of the print object; a power supply supplying power to the nozzle; and a controller receiving the surface information of the print object from the shape obtainer and controlling a movement of the nozzle or the stage. Thus, an apparatus for printing on a 3-dimensional surface using electrohydrodynamic force is provided, which is capable of performing a precision printing process on a 3-dimensional surface.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: May 12, 2015
    Assignee: Enjet Co. Ltd.
    Inventors: Do-Young Byun, Vu Dat Nguyen
  • Patent number: 8998382
    Abstract: A droplet ejection device comprising a flow passage, a nozzle orifice formed in a wall of the flow passage, a circulation system for circulating a liquid through the flow passage, and an actuator system for generating a pressure wave in the liquid in the flow passage, wherein an obstruction member is arranged in the flow passage in a position opposite to the nozzle orifice and projecting towards the nozzle orifice.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: April 7, 2015
    Assignee: Oce-Technologies B.V.
    Inventors: Hendrikus J. M. Freriks, Hans Reinten, Marcus J. Van Den Berg, Igor Shklyarevskiy, Klaas Verzijl, Ronald Berkhout
  • Patent number: 8979228
    Abstract: Provided is an inkjet recording apparatus capable of recording a high quality image without limiting the kinds of ink or recording media, including an inkjet head having a plurality of nozzles to eject ink droplets, wherein the ink droplets ejected from the plurality of the nozzles is charged by applying voltage between the inkjet head and the recording medium, and land on the recoding medium so as to record the image on the recording medium, wherein after a first ink droplet lands on the recording medium, a second ink droplet lands on the recording medium so as to overlap with the first ink droplet before discharging of the first ink droplet is completed.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: March 17, 2015
    Assignee: Konica Minolta, Inc.
    Inventor: Yasuo Nishi
  • Publication number: 20150062250
    Abstract: There is disclosed an apparatus for spraying and patterning, using an electrostatic force, includes a nozzle to which a voltage is applied to exhaust ink, a droplet circulation chamber provided in one end of the nozzle, with a hole provided in one end to spray the ink exhausted from the nozzle based on a particle size of the droplet and to temporarily collect the not-sprayed ink, and a substrate for impacting the ink sprayed from the hole thereon by forming an electric field between the nozzle and the substrate.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 5, 2015
    Inventors: Do-Young Byun, Vu Dat Nguyen, Baek Hoon Seong
  • Patent number: 8888249
    Abstract: The present invention provides a droplet jetting apparatus which jets fluid in a droplet shape. The apparatus includes a main body (100), which has a chamber (110) for containing fluid. The main body further has at least one nozzle (120) which communicates with the chamber and jets a droplet onto a printable matter, and a first electrode (130) which is formed on the inner surface of at least one selected from between the nozzle and the chamber by patterning treatment to make electrical contact with the fluid. The apparatus further includes a second electrode (140), which is provided between the nozzle and the printable matter and has a through hole, through which the droplet is jetted from the nozzle onto the printable matter, a power supply (200) which supplies a voltage applied between the first electrode and the second electrode, and a control unit (300) which controls the power supply.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: November 18, 2014
    Assignee: Enjet Co., Ltd.
    Inventors: Do Young Byun, Ji Hoon Kim, Si Bui Quang Tran
  • Patent number: 8870350
    Abstract: An image forming device includes a head including a nozzle that discharges an electrically-conductive recording liquid in accordance with a driving signal; an intermediate transfer body on which the recording liquid discharged by the head is applied; a voltage apply unit that applies a voltage between the intermediate transfer body and the head, so as to decompose the electrically-conductive recording liquid by electrolysis; a transfer unit that transfers an image supported on the intermediate transfer body onto a recording material; and a discharging control unit that generates the driving signal that causes the electrically-conductive recording liquid to be discharged from the nozzle. The discharging control unit generates the driving signal so that a position of a meniscus is placed outside the nozzle during a time interval in which the recording liquid temporarily bridges between the head and the intermediate transfer body.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Suzuki, Takeo Tsukamoto, Takeshi Orito, Manabu Seo, Hideomi Sakuma, Aino Hasegawa, Hiroyuki Yamashita, Yuuma Usui, Hisayoshi Ohshima, Takahiko Matsumoto
  • Publication number: 20140267501
    Abstract: Embodiments described herein are directed to a system for reducing electrostatic fields underneath print heads in a direct marking printing system. The system includes: one or more print heads for depositing ink onto a media substrate; a media transport for moving the media substrate along a media path past the one or more print heads; a conductive platen contacting the media transport belt; an electrostatic field reducer that includes an alternating current charge device positioned upstream of the one or more print heads; and one or electrically isolated biased electrodes in registration with the ink deposition areas of the one or more print heads. The media transport includes a media transport belt and, when the media is on the transport belt it has an electrostatic field, which can cause printing defects. The electrostatic field reducer and electrodes reduce the electrostatic field on the surface of the media and thereby reduce printing defects.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: XEROX CORPORATION
    Inventors: Palghat S. Ramesh, Joannes N. M. de Jong, Gerald M. Fletcher
  • Publication number: 20140253638
    Abstract: Provided herein is a device for discharging ink using electrostatic force, the device including a nozzle portion for discharging ink through an electric field to a substrate; an electrode portion for creating an electric field between the nozzle and the substrate; and a gas discharge portion for discharging guide gas from outside of the nozzle portion to control a cross-section area of ink being discharged from the nozzle portion.
    Type: Application
    Filed: August 24, 2012
    Publication date: September 11, 2014
    Applicant: Enjet Co., Ltd.
    Inventor: Su Jung Kim
  • Patent number: 8807678
    Abstract: A method of driving a hybrid type inkjet printing apparatus according to example embodiments may use both a piezoelectric method and an electrostatic method. The method of driving may include a plurality of driving modes that are determined by adjusting the order, amplitude, and duration of a piezoelectric driving voltage to a piezoelectric actuator and an electrostatic driving voltage to an electrostatic force applying unit. As a result, ink droplets may be ejected in various sizes and shapes. In a first driving mode, a dome-shaped ink meniscus may be formed at an end portion of a nozzle and ink droplets having a smaller size than the nozzle may be ejected from a surface of the dome-shaped ink meniscus. In a second driving mode, a cone-shaped ink meniscus may be formed at an end of the nozzle, and ink droplets having a smaller size than those of the first driving mode may be ejected from a sharp end portion of the cone-shaped ink meniscus.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: August 19, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-woo Chung, Young-ki Hong
  • Patent number: 8746848
    Abstract: Systems and methods of ejecting ink drops from an inkjet printer are disclosed. The systems and methods can include a printhead with one or more actuators with associated nozzles and membranes. A voltage waveform can be applied to the actuators to fill the actuators with a volume of ink and eject the ink through the nozzles as ink drops. The voltage waveform can have associated pre-fill voltage to fill the actuator with ink and a firing voltage to eject the ink. The actuator membranes can have multi-height dimples to protect the membranes from contacting electrodes and reduce the electric field.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: June 10, 2014
    Assignee: Xerox Corporation
    Inventors: Andrew W Hays, Richard P Germain, Joseph A Degroot, Peter J Nystrom, Jun Ma
  • Patent number: 8714703
    Abstract: Apparatus, articles of manufacture, and image forming apparatus for capturing aerosols are disclosed. An example apparatus includes a corona wire, and an excitation source to provide to the corona wire a composite signal having a direct current component and an alternating current component, the alternating current component having a cycle, a first portion of the cycle being sufficient to cause the composite signal to exceed an inception voltage at which ions are generated by the corona wire and a second portion to cause the composite signal to fall beneath the inception voltage, the excitation source to avoid causing the corona wire to substantially charge a substrate.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: May 6, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Napoleon Leoni, Omer Gila
  • Publication number: 20140118444
    Abstract: The present invention provides a droplet jetting apparatus which jets fluid in a droplet shape. The apparatus includes a main body (100), which has a chamber (110) for containing fluid. The main body further has at least one nozzle (120) which communicates with the chamber and jets a droplet onto a printable matter, and a first electrode (130) which is formed on the inner surface of at least one selected from between the nozzle and the chamber by patterning treatment to make electrical contact with the fluid. The apparatus further includes a second electrode (140), which is provided between the nozzle and the printable matter and has a through hole, through which the droplet is jetted from the nozzle onto the printable matter, a power supply (200) which supplies a voltage applied between the first electrode and the second electrode, and a control unit (300) which controls the power supply.
    Type: Application
    Filed: January 6, 2014
    Publication date: May 1, 2014
    Applicant: Enjet Co., Ltd.
    Inventors: Do Young Byun, Ji Hoon Kim, Si Bui Quang Tran
  • Patent number: 8699082
    Abstract: An apparatus to control a printing density in an image forming device and a method thereof, capable of controlling the printing density of a printed matter according to an amount of pages for a single page and a print rate. The apparatus and method solve a problem wherein the printing density is recognized as being degraded due to an increase of pages for a single paper or a reduced print rate. The printing density is set automatically or manually, and a bias voltage applied to a developing roller is controlled according to set-up information so that the printing density is controlled.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: April 15, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young Ju Kim, Bong Gi Lee
  • Patent number: 8696102
    Abstract: A printing apparatus and method may provide efficient transfer of ink from a transfer belt to a recording sheet by using a transfer mechanism having a supporting member for supporting the recording sheet and a contact member. In one arrangement, the contact member may be configured to contact an inner peripheral surface of the transfer belt to bend the transfer belt and push the outer peripheral surface of the belt outward at an angle smaller than 90°. By pushing and bending the transfer belt, the an ink transfer surface of the belt and the recording sheet may be pinched together to affect transfer of the image.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: April 15, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Seiji Shimizu
  • Patent number: 8684500
    Abstract: Diaphragms for electrostatic actuators for inkjet printers and methods for manufacturing are provided. The method includes electroplating a first layer on a mandrel, and applying a photoresist to the first layer. The method also includes electroplating a second layer on the first layer adjacent the photoresist, such that the first and second layers form a substantially homogenous structure, and separating the photoresist from the first and second layers to expose one or more flexure recesses where the photoresist was positioned, with the diaphragm having a reduced stiffness proximal the flexure recess.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: April 1, 2014
    Assignee: Xerox Corporation
    Inventor: Peter J. Nystrom
  • Patent number: 8657414
    Abstract: A fluid-ejection printhead die includes a fluid-ejection firing element and an electrochemical cell. The fluid-ejection firing element is to cause droplets of fluid to be ejected from the fluid-ejection printhead die. The electrochemical cell is to measure an electrical property of the fluid. The fluid-ejection firing element and the electrochemical cell are both part of the fluid-ejection printhead die.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: February 25, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey A. Nielsen, Sadiq Bengall, Greg Scott Long, Joshua M. Yu
  • Patent number: 8651653
    Abstract: An apparatus and method apply release fluid to a leveler in a printing apparatus. The apparatus can include a substrate path, at least one release fluid spray nozzle, and a marking material leveling system having a marking material leveler. The method can include transporting a substrate with marking material along the substrate path. The method can include pulse spraying release fluid to the marking material leveling system using the at least one release fluid spray nozzle to apply the release fluid to the marking material leveler. The method can include leveling marking material on the substrate using the marking material leveler with release fluid.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: February 18, 2014
    Assignee: Xerox Corporation
    Inventors: Anthony S. Condello, Bryan J. Roof
  • Patent number: 8632164
    Abstract: A liquid ejecting apparatus includes a platen disposed with a gap from a nozzle plate of a recording head and supporting a recording medium in ejecting, and an platen application voltage generating unit generating an electric field having a direction different from an electric field generated between an individual external electrode of a piezoelectric vibrator and nozzles, between the nozzle plate and the platen, in which the intensity of the electric field generated by the applied-to-plate voltage generating unit is set in between the maximum electric field intensity and the minimum electric field intensity between the individual external electrode and the nozzles.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: January 21, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Yoichi Yamada, Masaru Kobashi, Toshiya Okada
  • Patent number: 8602532
    Abstract: A fluid-application mechanism is to cause fluid to be applied onto media. An electrowetting mechanism is to generate an electric field to affect the fluid applied onto the media.
    Type: Grant
    Filed: April 30, 2011
    Date of Patent: December 10, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dustin W. Blair, Steven W. Steinfield, Stephen W. Bauer, Dennis M. Huff
  • Patent number: 8596764
    Abstract: An image forming apparatus that forms an image on a sheet by discharging a liquid droplet from a nozzle hole to the sheet, includes a voltage applying part that applies a voltage to an electrostatic attraction member to cause the electrostatic attraction member to attract the sheet, and acts as an electrically charging part that causes the liquid droplet to be electrically charged; and a checking part that detects an electrical charge or an induced electric current of the liquid droplet that has been electrically charged, for checking a state of the liquid droplet being discharged from the nozzle hole, wherein an electric potential applied by the voltage applying part is different between at a time when the liquid droplet is separating from the nozzle hole and at a time when the liquid droplet is flying.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: December 3, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Hitoshi Kida
  • Patent number: 8596763
    Abstract: A liquid transport apparatus includes a substrate, liquid transport channels disposed on a surface of the substrate in which a conductive liquid is transported, electrodes disposed in regions in corresponding ones of the liquid transport channels, and wiring portions coupled to corresponding electrodes and extending along the surface of the substrate between adjacent liquid transport channels. Also, the apparatus includes an insulating layer which is disposed so as to cover the electrodes. The insulating layer has a surface in which the liquid repellency changes according to an electrical potential difference between the conductive liquid and the electrodes. The apparatus also has a potential applying unit which applies an electric potential to each of the electrodes through terminals at the ends of the wiring portions.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: December 3, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Hiroto Sugahara
  • Patent number: 8579414
    Abstract: A fabricated structure for use with an associated marking device is provided. In one form, the fabricated structure includes a self-lifting spring finger having a nib for marking.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: November 12, 2013
    Assignee: Xerox Corporation
    Inventors: David K. Biegelsen, Steven A. Buhler, Scott A. Elrod, John S. Fitch, David K. Fork, Babur B. Hadimioglu, Richard Stearns