With Individual Drop Generation And/or Control Patents (Class 347/74)
  • Patent number: 10583653
    Abstract: The present disclosure provides an inkjet head device for inkjet printers, which includes a tubular base, a composite plate and an inkjet head assembly mounted on the composite plate; the composite plate includes a fiberglass plate and a plastic plate integrally connected to the fiberglass plate, the fiberglass plate is engaged with the open side of the base along an axial direction of the base, the plastic plate is located on a surface facing the base of the fiberglass plate. According to the inkjet head device for inkjet printers of the disclosure, the base plate is a composite plate formed by integrally connecting the fiberglass plate and the plastic plate, where the inkjet head assembly is mounted to form an integrated module, thus the disassembly, the assembly, or the maintenance are convenient.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: March 10, 2020
    Assignee: LEAD TECH (ZHUHAI) ELECTRONIC CO., LTD.
    Inventors: Jinsong Liu, Jingbiao Chen, Guozheng Fu, Yuandong He, Ke He
  • Patent number: 10176658
    Abstract: A document may include a non-magnetic substrate, a first colorant mixture printed as a first image upon the substrate, the first colorant mixture including a magnetic ink, and a second colorant mixture printed as a second image upon the substrate in substantially close spatial proximity to the printed first colorant mixture. The second colorant mixture may consist essentially of one or more non-magnetic inks and exhibit properties of both low visual contrast and high magnetic contrast against the first colorant mixture, such that the resultant printed substrate does not reveal the first image to the human eye, but will reveal the first image to a magnetic image reader.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: January 8, 2019
    Assignee: Xerox Corporation
    Inventors: Reiner Eschbach, Martin S. Maltz, Raja Bala, Yonghui Zhao
  • Patent number: 9636911
    Abstract: The purpose of the present invention is to suppress variance in the print quality of an inkjet recording device. In order to solve the above problem, the present invention is an inkjet recording device of a charge control type equipped with two or more nozzles which are disposed side by side in a print head, the inkjet recording device being characterized by the following: having a control unit for performing print control independently for each of a plurality of printing configurations; the control unit having an input unit whereby current values of print elements of each of the printing configurations can be periodically checked, and having an output unit whereby the print elements during a subsequent print can be modified; and in that the control unit further adjusts each of the nozzles for every print so as to cause the “charging voltage”, “deflecting voltage”, and “ink pressure” of the subsequent print to approach a reference value.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: May 2, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiroko Kurihara, Takashi Kawano
  • Patent number: 9623689
    Abstract: A modular inkjet printhead assembly including a plurality of printhead modules mounted on alternating sides of a central rail assembly. The rail assembly includes a beam and a rod attached to a side of the beam. The printhead modules include a jetting module having an array of nozzles, a first alignment tab having a first alignment datum and a second alignment datum, a second alignment tab having a third alignment datum and a fourth alignment datum, a rotational alignment feature including a fifth alignment datum, and a cross-track alignment feature including a sixth alignment datum. Portions of the alignment tabs of the jetting module are adapted to fit within corresponding notches in the beam. A jetting module clamping mechanism and a jetting module cross-track force mechanism apply forces to the jetting module that causes each alignment datum to engage with corresponding alignment features on the rail assembly.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: April 18, 2017
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Michael J. Piatt, Scott F. Roberts, John Charles Brazas, Jr., Charles D. Rike, David F. Tunmore
  • Patent number: 9527306
    Abstract: The effect of air resistance acting on ink drops discharged from nozzles of an ink-jet head is appropriately controlled, for example, by means of a method suitable for a breathable medium, such as a cloth and the like. In this way, for example, high-resolution printing, printing with a great gap distance, and the like is properly implemented.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: December 27, 2016
    Assignee: MIMAKI ENGINEERING COMPANY, LTD.
    Inventors: Masaru Ohnishi, Kazuhide Yokoyama
  • Patent number: 9522533
    Abstract: A droplet driving control device includes: a droplet ejection control unit which ejects droplets at requested droplet ejection periods; and an adjustment unit which adjusts control of the droplet ejection control unit using at least continuous two of the droplet ejection periods as one set based on an error of droplet speed with respect to a proper value thereof, so that droplets can be ejected at different droplet ejection periods within a range of the one set, and an average value of the droplet ejection periods within the range of the one set for ejecting the droplets can be equal to each of the requested droplet ejection periods.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: December 20, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shinji Seto, Hirotake Sasaki
  • Patent number: 9278522
    Abstract: Provided are various methods and devices for electrohydrodynamic (E-jet) printing. The methods relate to sensing of an output current during printing to provide control of a process parameter during printing. The sensing and control provides E-jet printing having improved print resolution and precision compared to conventional open-loop methods. Also provided are various pulsing schemes to provide high frequency E-jet printing, thereby reducing build times by two to three orders of magnitude. A desktop sized E-jet printer having a sensor for real-time sensing of an electrical parameter and feedback control of the printing is provided.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: March 8, 2016
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Andrew Alleyne, Kira Barton, Sandipan Mishra, Placid Ferreira, John Rogers
  • Patent number: 9216587
    Abstract: A liquid circulation part has a recovery path where a liquid flows into a retaining part from a first head and a second head. The recovery path has a first merging point where the liquid flowing from the first head and the liquid flowing from the second head are merged, a first recovery path part where the liquid flowing from the first head flows into the first merging point, and a second recovery path part where the liquid flows from the first merging point. The cross-sectional area of the second recovery path part, orthogonal to a direction of flow of the liquid in the second recovery path part, is greater than the cross-sectional area of the first recovery path part, orthogonal to the direction of flow of the liquid in the first recovery path part.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: December 22, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Masaaki Ando, Kaoru Koike
  • Patent number: 9211556
    Abstract: The invention relates to a method for operating a jetting device, configured to expel droplets of an electrically conductive fluid wherein at least a part of the conductive fluid is positioned in a magnetic field, the method comprising the steps of providing a direct electrical current in the part of the conductive fluid positioned in the magnetic field, and providing an alternating electrical current in the part of the conductive fluid positioned in the magnetic field, the alternating electrical current, wherein the direct electrical current and the alternating electrical current are controlled such that the sum of heat generated by the direct electrical current and the alternating electrical current is substantially constant. The invention further relates to a jetting device for employing the described method.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: December 15, 2015
    Assignee: OCE-TECHNOLOGIES B.V.
    Inventor: Sandor Hubertus Gertrudis Joppen
  • Patent number: 9162449
    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: Grant
    Filed: August 26, 2014
    Date of Patent: October 20, 2015
    Assignee: Enjet Co., Ltd.
    Inventors: Do-Young Byun, Vu Dat Nguyen, Baek Hoon Seong
  • Patent number: 9144993
    Abstract: An apparatus includes an inkjet assembly having inkjet nozzles through each of which ink flows at a nominal flow rate as it is ejected from the nozzle onto a substrate. Ink is held under a nominal negative pressure associated with a characteristic of a meniscus of the ink in the nozzle when ejection of ink from the nozzle is not occurring. The apparatus includes recirculation flow paths, each flow path having a nozzle end at which it opens into one of the nozzles and another location spaced from the nozzle end that is to be subjected to a recirculation pressure lower than the nominal negative pressure so that ink is recirculated from the nozzle through the flow path at a recirculation flow rate.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: September 29, 2015
    Assignee: FUJIFILM Dimatix, Inc.
    Inventors: Robert L. Wells, Jr., Bailey Smith, Marlene McDonald, William Letendre, Matthew Aubrey, John Kelly, Darrell Herrick, Robert Hasenbein
  • Patent number: 9039146
    Abstract: A material deposition system includes a frame, a support coupled to the frame to support an electronic substrate during a deposit operation, a gantry coupled to the frame, and a deposition head coupled to the gantry. The deposition head is movable over the support by movement of the gantry. The deposition head includes a chamber to hold material, an actuator to push a volume of material out of the chamber, a needle extending from the chamber and terminating in a needle orifice, and at least two air jets located on opposite sides of the needle orifice. A desired volume of material is formed at the needle orifice in response to the actuator, and each of the at least two air jets produce a timed pulse of air to create a micro-droplet from the desired volume and to accelerate the micro-droplet to high velocity.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: May 26, 2015
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventors: Kenneth C. Crouch, Kui-Chiu Kwok, Robert W. Tracy, Rita Mohanty, Thomas J. Karlinski, Scott A. Reid
  • Patent number: 9022535
    Abstract: Ink jet printers, ink stream modulators, and methods to generate droplets from an ink stream are disclosed. An example method to generate droplets from an ink stream includes generating a stream of ink with an inkjet nozzle and modulating the stream of ink into a plurality of droplets by generating an alternating electrical field having a frequency based on a permittivity of the ink to cause a dielectrophoretic effect.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: May 5, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jun Zeng, Michael H. Lee, Henryk Birecki
  • Patent number: 9010910
    Abstract: A material deposition system includes a frame, a support coupled to the frame to support an electronic substrate during a deposit operation, a gantry coupled to the frame, and a deposition head coupled to the gantry. The deposition head is movable over the support by movement of the gantry. The deposition head includes a chamber to hold material, an actuator to push a volume of material out of the chamber, a needle extending from the chamber and terminating in a needle orifice, and at least two air jets located on opposite sides of the needle orifice. A desired volume of material is formed at the needle orifice in response to the actuator, and each of the at least two air jets produce a timed pulse of air to create a micro-droplet from the desired volume and to accelerate the micro-droplet to high velocity.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: April 21, 2015
    Assignee: Illinois Tool Works Inc.
    Inventors: Kenneth C. Crouch, Kui-Chiu Kwok, Robert W. Tracy, Rita Mohanty, Thomas J. Karlinski, Scott A. Reid
  • Patent number: 8998391
    Abstract: A method for determining the quality of a break-off of an ink jet of a CIJ printing machine is disclosed. In one aspect, this method includes: generating a first line of N1 drops, all charged by the charge means, at the same voltage V1. Also included is: generating at least one drop G1, charged by the charge means, at a second voltage (VG1), followed by at least one drop G2, charged by the charge means, at a third voltage (VG2) lower than V1; generating a second line of N2 drops, all charged by the charge means, at a same voltage V2; and measuring, using an electrostatic sensor, the charge variation of a non-deflected jet of drops including at least the first line of drops and the second line of drops, separated by the drops G1 and G2, during the passage of the jet in front of the sensor.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: April 7, 2015
    Assignee: Markem-Imaje
    Inventors: Florence Odin, Jean-Pierre Arpin
  • Patent number: 8991986
    Abstract: A method of printing an image with a continuous inkjet printer system employing bimodal drop size generation with pigmented inkjet ink compositions comprising a polymer additive, wherein the liquid ink is an aqueous inkjet ink comprises dispersed pigment colorant particles having a mean particle size of less than 150 nanometers and at least about 0.1 wt % of polymer additive distinct from any polymer dispersant used to disperse the pigment particles, and recirculating liquid ink supplied to the nozzle if the printer system from a liquid ink source is in-line filtered with a filter selected to be effective at retaining particles having particle sizes equal to and greater than 0.6 micrometers from the liquid ink and to pass the dispersed pigment particles. The invention enables high quality drop control in a continuous inkjet printing system.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: March 31, 2015
    Assignee: Eastman Kodak Company
    Inventors: Allan Francis Sowinski, Simon C. Haseler, Robert Link, Rajesh Vinodrai Mehta, Todd Russell Griffin
  • 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
  • Patent number: 8974029
    Abstract: An ink jet recording apparatus and printing control method are provided in which when a moving speed of a printing object is changed, a difference in writing start position is reduced and printing quality is improved. The apparatus includes an ink container, a nozzle connected to the container for ejecting ink, a charging electrode to charge the ejected ink, a deflecting electrode to deflect the charged ink, a gutter to collect ink not used for printing, a writing start timing control circuit to generate a first line clock signal, a printing width control circuit to generate a second line clock signal, and a control part. The control part controls print start timing based on the first clock signal, and when the printing object reaches the printing start timing, the control part performs a width adjustment of a character string of printing content based on the second clock signal.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: March 10, 2015
    Assignee: Hitachi Industrial Equipment Systems, Ltd.
    Inventors: An Qiu, Tsuneaki Takagishi, Takashi Kawano, Nobuhiro Harada, Shinichi Kobayashi
  • Patent number: 8932677
    Abstract: Liquid dispensing includes providing a downwardly inclined slide surface and a carrier liquid dispensing channel that includes an outlet opening on the slide surface. A carrier liquid source is pressurized causing carrier liquid to flow continuously through the outlet opening of the carrier liquid dispensing channel and down the slide surface. A liquid dispenser array structure is provided and includes functional liquid dispensers located on a substrate that is common to the functional liquid dispensers. The functional liquid dispensers include a functional liquid supply channel, a functional liquid source that provides functional liquid, and a drop formation device associated with an interface of the functional liquid supply channel and the slide surface. The drop formation device is selectively actuated to form discrete functional liquid drops in the carrier liquid flowing down the slide surface. The functional liquid is immiscible in the carrier liquid.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: January 13, 2015
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, Hrishikesh V. Panchawagh
  • Patent number: 8919934
    Abstract: A voltage is applied between first and second deflecting electrodes from a deflecting voltage controller, whereby an electric field is formed between the first and second deflecting electrodes in a direction perpendicular to electrode surfaces. An electric line of force is generated from a direction perpendicular to the electrode surface of the first deflecting electrode and made perpendicularly incident on the electrode surface of the second deflecting electrode. Since the first and second deflecting electrodes are parallel to each other, a plurality of parallel electric lines of force are formed perpendicularly to the electrode surfaces of the first and second deflecting electrodes. Droplets after passing charged electrodes fly in a region where this deflecting electric field is formed, whereby charged droplets are deflected in a direction in which the charged droplets approach the second electrode having opposite charging polarity. The charged droplets form a printing pattern.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: December 30, 2014
    Assignee: Hitachi Industrial Equipment Services Co., Ltd.
    Inventors: Masato Ikegawa, Eiji Ishii, Nobuhiro Harada, Tsuneaki Takagishi
  • Patent number: 8911064
    Abstract: A method for providing drop placement adjustment of drops deposited on a print media by a printhead in a continuous inkjet printer, the method comprising the steps of providing the printhead with a drop generator having at least one nozzle; moving the printhead relative to the print media; causing the printhead to form drops from the at least one nozzle with a drop formation period being the time between consecutive drop formations; wherein a portion of the formed drops are allowed to strike pixel locations on the print media for forming print drops, while other drops are directed toward a catcher and do not strike the print media for forming catch drops; creating a series of the print drops to print on a series of consecutive pixel locations; and adjusting a velocity of a portion of the formed print drops relative to a velocity of other print drops to adjust the placement of the print drop within the pixel locations.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: December 16, 2014
    Assignee: Eastman Kodak Company
    Inventors: Robert Link, James L. Bello, Todd R. Griffin
  • Patent number: 8888256
    Abstract: A system and method of printing includes providing print and non-print drop formation waveforms to a drop formation device of a drop ejector in response to input print data to form print and non-print drops, respectively, from a liquid jet. First and second charging waveforms are provided to a charging electrode of a drop charging device when a relative motion of a receiver and the drop ejector is provided or measured at first and second speeds, respectively. The first and second charging waveforms are independent of input print data and include first and second voltage states. The drop formation device and the drop charging device are synchronized to produce print and non-print drop charge states on print and non-print drops, respectively. A deflection device causes print and non-print drops to travel along print and non-print drop paths, respectively, with the non-print drops being collected by a catcher.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: November 18, 2014
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, Hrishikesh V. Panchawagh
  • Patent number: 8876264
    Abstract: An ink droplet generation module for a print head assembly for a continuous ink jet printer, the printer having an ink supply system, a control system and a power supply system. The ink droplet generation module includes a supporting plate, an ink droplet generator, a charge electrode assembly, deflector plates, a phase measurement assembly, and a gutter tube, all attached to the supporting plate.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: November 4, 2014
    Assignee: Videojet Technologies Inc.
    Inventors: Salhadin Omer, Jerzy Zaba
  • Patent number: 8864266
    Abstract: A printing device using a print head ejecting ink from a plurality of nozzles to print ink dots of a plurality of dot diameters, includes a print-characteristic acquisition unit obtaining print characteristic information on dot diameters of ink dots to be printed per each predetermined portion of the plurality of nozzles, a distribution ratio determination unit determining a distribution ratio for distributing image data to the predetermined portions of the plurality of nozzles based on the information, a dot print position determination unit quantizing the image data to determine a dot print position based on the image data and sizes and an array of thresholds; and a plurality of masks based on dot distribution order determined according to the distribution ratio, distributing printing of each of the ink dots of the plurality of dot diameters to the dot print position determined by the dot print position determination unit.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Fumiko Suzuki, Norihiro Kawatoko, Hitoshi Nishikori, Osamu Iwasaki, Atsuhiko Masuyama, Satoshi Masuda, Tomoki Yamamuro
  • Patent number: 8851638
    Abstract: A continuous ink jet printing system capable of printing at multiple predetermined print resolutions. The system comprises a drop generator having an array of nozzles for emitting a plurality of continuous streams of liquid for applying ink to media driven in a media advance direction having a source for pressurized liquid for supplying pressurized liquid to the plurality of nozzles. The plurality of nozzles have effective nozzle diameters D0 and a stimulation device associated with each nozzle of the plurality of nozzles for forming ink drops having predetermined drop volumes from the continuous streams of liquid. The predetermined drop volumes include non-print drops of a unit volume V0, and print drops having volumes that are integer multiples of the unit volume, mV0, wherein m is an integer greater than 1. A catcher collects the non-print drops and a selector selects a predetermined print resolution. Each predetermined print resolution has a corresponding print drop volume mV0.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: October 7, 2014
    Assignee: Eastman Kodak Company
    Inventor: Carolyn R. Ellinger
  • Patent number: 8801129
    Abstract: A method for operating a jetting module includes applying to a drop forming mechanism a sequence of drop formation waveforms in which a small-drop waveform applied after another identical small-drop waveform causes a small drop of volume Vs to be formed; applying a large-drop waveform after another identical large-drop waveform causes a large drop of volume VL to be formed, and applying a large-drop waveform adjacent to a small-drop waveform can be done in a way that produces a large drop having a volume VL2, where VL2 is different than VL and a small drop of volume VS2, where VS2 is different than Vs.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: August 12, 2014
    Assignee: Eastman Kodak Company
    Inventors: Robert Link, James Lee Bello, Todd Russell Griffin
  • Patent number: 8794179
    Abstract: The main object of the present invention is to provide a method for manufacturing a pattern formed body by the electric field jet method, capable of stabilizing the discharge amount and the discharge direction of a liquid. The present invention achieves the object by providing a method for manufacturing a pattern formed body characterized in that a pattern is formed on a substrate by: discharging a liquid from a discharge orifice by applying a voltage between a first electrode, disposed in the vicinity of the discharge orifice of a nozzle of a discharge head, and a second electrode, disposed in between the discharge orifice and the substrate, having an opening for discharge; and adhering the liquid onto the substrate by passing through the opening for discharge of the second electrode.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: August 5, 2014
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Katsunori Tsuchiya, Masato Idegami
  • Patent number: 8714716
    Abstract: The present subject matter relates to a method and system for pulsed air-actuated micro-droplet on demand jetting, especially for jetting high viscosity liquids. A needle extends from a liquid chamber and terminates in a drop-forming orifice outlet from which micro-droplets are generated. At least two air jets direct a timed pulse of air at the drop-forming orifice outlet of the needle. The pulsed air is synchronized with the formation of a desired volume of liquid at the orifice outlet to extract and propel a micro-droplet at high velocity to a substrate. The air jets are turned on prior to the forming of the desired volume at the orifice outlet of the needle, and turned off after the micro-droplet had been produced.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: May 6, 2014
    Assignee: Illinois Tool Works Inc.
    Inventor: Kui-Chiu (KC) Kwok
  • Patent number: 8696094
    Abstract: An apparatus and method of ejecting liquid drops includes modulating a liquid jet to cause it to break off into drop clusters, including first and second drops traveling along a path, separated on average by a drop cluster period. An input image data independent charging waveform of a charging device includes a period that is equal to the cluster period and first and second voltage states having opposing polarities. The charging device produces first and second charge states on the first and second drops, respectively, of each cluster. The first and second drops are deflected away from the path toward first and second catchers, respectively. Relative velocity of drops of a selected drop cluster is modulated in response to input print data causing the drops to form a merged drop traveling along the path having a third charge state that prevents it from being deflected to either catcher.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: April 15, 2014
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, James A. Katerberg, Hrishikesh V. Panchawagh
  • Patent number: 8697008
    Abstract: A method and device for periodically perturbing the flow field within a microfluidic device to provide regular droplet formation at high speed.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: April 15, 2014
    Assignee: Eastman Kodak Company
    Inventors: Andrew Clarke, Nicholas J. Dartnell, Christopher B. Rider
  • Patent number: 8696081
    Abstract: First and second piezoelectric layers are stacked from a side closer to an opening of a liquid channel formed in a channel member in this order, and are sandwiched between electrodes with respect to a stacking direction. A driving-signal generating section generates an ejection driving signal for ejecting droplets from an ejection port and a non-ejection driving signal for vibrating a meniscus formed in the ejection port without ejecting droplets from the ejection port. A voltage applying section applies, based on image data, a voltage corresponding to the ejection driving signal to one of the first and second piezoelectric layers, and applies a voltage corresponding to the non-ejection driving signal to another one of the first and second piezoelectric layers during a period in which the voltage corresponding to the ejection driving signal is not applied to the one of the first and second piezoelectric layers.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: April 15, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tomoko Hibino
  • Patent number: 8672460
    Abstract: Various particle transport systems and components for use in such systems are described. The systems utilize one or more traveling wave grids to selectively transport, distribute, separate, or mix different populations of particles. Numerous systems configured for use in two dimensional and three dimensional particle transport are described.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: March 18, 2014
    Assignee: Xerox Corporation
    Inventors: Armin R. Volkel, David Biegelsen, Philip D. Floyd, Greg Anderson, Fred Endicott, Eric Peeters, Jaan Noolandi, Karen A. Moffat, Peter M. Kazmaier, Maria McDougall, Daniel G. Bobrow
  • Patent number: 8651632
    Abstract: A group timing delay device shifts the timing of drop formation waveforms supplied to drop formation devices of one of first and second nozzle groups so that print drops from the nozzle groups are not aligned relative to each other along a nozzle array direction. A charging device includes a common charge electrode associated with liquid jets from the nozzle groups and a source of varying electrical potential between the charge electrode and liquid jets which provides a charging waveform that is independent of a print and non-print drop pattern. The charging device is synchronized with the drop formation devices and the group timing delay device to produce a print drop charge state on print drops of a drop pair, a first non-print drop charge state on non-print drops of the drop pair, and a second non-print drop charge state on third drops.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 18, 2014
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, Hrishikesh V. Panchawagh, Shashishekar P. Adiga, Kam C. Ng
  • Patent number: 8651633
    Abstract: A group timing delay device is provided to shift the timing of drop formation waveforms supplied to drop formation devices of nozzles of one of first and second groups so that print drops formed from nozzles of the first and second groups are not aligned relative to each other along a nozzle array direction. A charging device includes a common charge electrode associated with liquid jets formed from the nozzles of the first and second group and a source of varying electrical potential between the charge electrode and liquid jets. The source of varying electrical potential provides a charging waveform that is independent of print and non-print drop patterns. The charging device is synchronized with the drop formation device and the group timing delay device to produce a print drop charge state on print drops and a non-print drop charge state on non-print drops.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 18, 2014
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, Hrishikesh V. Panchawagh, Shashishekar P. Adiga, Kam C. Ng
  • Patent number: 8649020
    Abstract: A color chart having a plurality of mirror-image color blocks arranged in a matrix, with each color block a mirror image of an adjacent color block, each color block having rows and columns of color patches, wherein the concentration of a first color of the multiple colors changes unidirectionally across color patches in any given row of a color block, the concentration of a second color of the multiple colors changes unidirectionally across color patches in any given column of a color block, and the concentration of a third color of the multiple colors remains unchanged across all the plurality of color patches within a color block and differs only between color blocks.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyoshi Ishizaki, Tadashi Kitai, Hitomi Kaneko
  • Patent number: 8646882
    Abstract: Drop formation devices are provided with drop formation waveforms to modulate liquid jets to cause portions of the liquid jets to form print drops having a jet breakoff length Lp in a print drop breakoff length range Rp and non-print drops having a jet breakoff length Lnp in a non-print drop breakoff length range Rnp. A timing delay device shifts the timing of the waveforms supplied to drop formation devices of first and second nozzle groups so that print drops formed from first and second nozzle groups are not aligned relative to each other. A charging device includes a charge electrode that is positioned relative to the breakoff length Lp and breakoff length Lnp such that there is a difference in electric field strength at the two breakoff lengths to produce a print drop charge state on print drops and a non-print drop charge state on non-print drops.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 11, 2014
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, Hrishikesh V. Panchawagh, Shashishekar P. Adiga
  • Patent number: 8646883
    Abstract: Drop formation devices are provided with a sequence of drop formation waveforms to modulate the liquid jets to selectively cause portions of the liquid jets to break off into print drops having a print drop volume Vp and non-print drops having a non-print drop volume Vnp. The print and non-print drop volumes are distinct from each other. A timing delay device shifts the timing of drop formation waveforms supplied to drop formation devices of first and second nozzle groups so that print drops from the first and second nozzle groups are not aligned relative to each other. A charging device includes a charge electrode that is positioned in the vicinity of break off of liquid jets to produce a print drop charge state on drops of volume Vp and to produce a non-print drop charge state on drops of volume Vnp.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 11, 2014
    Assignee: Eastman Kodak Company
    Inventors: Michael A. Marcus, Hrishikesh V. Panchawagh, Shashishekar P. Adiga
  • Patent number: 8641175
    Abstract: A liquid jet includes a fundamental period of jet break off. A print period is defined as N times the fundamental period of jet break off where N is an integer greater than 1. Input image data is provided having M levels per input image pixel including a non-print level where M is an integer and 2<M?N+1. A charging device waveform, independent of the input image data, repeats during print periods and includes print and non-print drop voltage states. A drop formation device waveform, having a period equal to the print period, is selected in response to the input image data to form from the jet print drops having a volume corresponding to an input image pixel level. The devices are synchronized to produce a print drop charge to mass ratio and a non-print drop charge to mass ratio on drops breaking off from the jet.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: February 4, 2014
    Assignee: Eastman Kodak Company
    Inventors: Hrishikesh V. Panchawagh, Michael A. Marcus, Shashishekar P. Adiga
  • Patent number: 8617776
    Abstract: A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: December 31, 2013
    Assignee: Eastman Kodak Company
    Inventors: Jason Morgan, John F. Crichton, Raymond Rossborough, Timothy G. Armstrong, Matthias H. Regelsberger
  • Patent number: 8573757
    Abstract: The present invention provides methods of generating scalable patterned features on a substrate. The methods includes ejecting a succession of droplets; applying a force to the droplets in a manner such that the droplets travel along a designated path; altering the properties of one or more of the droplets in a manner so as to adjust the size of the droplets; and depositing the droplets on the substrate to generate patterned features on the substrate. The present invention also provides apparatuses for generating scalable patterned features on a substrate.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 5, 2013
    Assignee: North Carolina Agricultural and Technical State University
    Inventor: Salil Desai
  • Patent number: 8550605
    Abstract: Provided is a channel member having a channel which penetrates from one main surface to the other main surface. The channel is formed with its diameter increased toward the other main surface from the one main surface. A parallel section which is substantially parallel to the other main surface and is exposed to the other main surface is provided on the inner surface of the channel.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: October 8, 2013
    Assignee: Kyocera Corporation
    Inventor: Takehisa Higa
  • Patent number: 8526056
    Abstract: A method for printing with curable ink is presented. The method comprises the steps of: generating an image wise pattern of spaced apart ink droplet locations for representing the image; and separating the pattern into at least first and second different interleaved portions, each portion comprising a plurality of droplet locations and the droplet locations of each interleaved portion being spaced apart from each other and spaced apart from the droplet locations of the remaining interleaved portions. In a first printing pass, ink droplets are deposited on the substrate at the drop locations of the first interleaved portion. Then, in a final printing pass, ink droplets are deposited on the substrate at the droplet locations of the second interleaved portion. The deposited ink droplets are then cured by exposing the deposited ink droplets to curing radiation in a first partial curing step between first and final printing passes and in a final curing step.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: September 3, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Eyal Gargir, Ran Vilk, Anton Andrusier
  • Patent number: 8511801
    Abstract: The invention relates to an apparatus for ejecting droplets of a fluid material, comprising: a reservoir for storing the material, a channel connected with the reservoir, which is provided with at least one outflow opening from which, in use, flows a jet of the material breaking up into droplets, a pump for pressurizing the fluid material in the reservoir, so as to pass the material under pressure through the channel in the direction of the outflow opening, and a movable member provided in the reservoir, the member formed by a plurality of surfaces shaped to induce a pressure variation in the fluid material upstream of the outflow opening, for the purpose of obtaining the jet breaking up into droplets; the movable member mounted to have each opposed surface receiving identical hydrostatic pressure, to generate a net resulting zero force exerted on the movable member by the hydrostatic pressure. Accordingly, a simple mechanism is provided for providing multiple printing nozzles.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: August 20, 2013
    Assignee: Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO
    Inventors: Frederikus Johannes Maria de Vreede, Antonius Paulus Aulbers, Rene Jos Houben
  • Patent number: 8511786
    Abstract: One aspect is a drop detection arrangement including a light source for projecting a light beam for scattering light off of an ejected drop. The arrangement includes a light collector configured to collect the scattered light off the ejected drop and configured to process scattered light into an output signal. The arrangement includes a controller configured to receive the output signal from the light collector, to calculate the velocity of the ejected drop and to determine the volume of the ejected drop using the output signal and the velocity of the ejected drop.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: August 20, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Kenneth Ward
  • Patent number: 8490282
    Abstract: According to one feature of the present invention, a method of manufacturing a porous catcher includes providing a catcher face material layer; forming pores in the catcher face material layer using a first etching process that is controlled by a first photolithographic mask; providing a reinforcing structure material layer that is in mechanical contact with the porous catcher face; forming openings in the reinforcing structure material layer using a second etching process that is controlled by a second photolithographic mask; and fluidically connecting the openings in the reinforcing structure and the pores of the catcher face using a material removal process.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: July 23, 2013
    Assignee: Eastman Kodak Company
    Inventors: Shan Guan, Yonglin Xie, Chang-Fang Hsu
  • Patent number: 8488184
    Abstract: According to the present invention, there is disclosed an image forming apparatus comprising a constitution driven/controlled independently for each recording head. The apparatus rewrites image data or parameters or changes a driving voltage at a desired timing, and realizes a uniform or appropriate density of an image formed by control of an ink spout amount based on a temperature detection signal of the recording head detected by a temperature detection unit disposed in each recording head. The apparatus is capable of remarkably narrowing a mutual conveying interval among a plurality of conveyed recording mediums.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: July 16, 2013
    Assignee: Riso Kagaku Corporation
    Inventors: Toshinao Aruga, Keiichirou Tawara, Naoki Ishii
  • Patent number: 8485635
    Abstract: In a method to regenerate during operation ink in nozzles of at least one inkjet print head operating according to drop on demand in an inkjet print apparatus, nozzles of the print head that generate print dots on a printing substrate are activated such that the nozzles output first ink droplets of a predetermined volume in a direction towards the printing substrate. Nozzles that are not being currently used to generate print dots on the printing substrate are activated such that they output at least one second ink droplet of a smaller volume in comparison to the first ink droplets volume. During at least the outputting of the second ink droplet, a suction flow is generated between the inkjet print head and the printing substrate of such strength that the second ink droplet is deflected so it does not arrive at the printing substrate.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: July 16, 2013
    Assignee: Océ Printing Systems GmbH
    Inventor: Christoph Stadler
  • Patent number: 8469495
    Abstract: A method of producing ink drops (54, 56) in a printing apparatus (20) sends print-nonprint data from a controller (38) to at least one inkjet nozzle (28). The print-nonprint data includes data on a current ink drop and data on at least one previous ink drop. A set of waveforms (114, 116) is provided to the at least one nozzle and a waveform based on the print-nonprint data is selected. The selected waveform is supplied to an ink droplet formation device associated with the at least one nozzle and an ink drop is produced from the at least one nozzle.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: June 25, 2013
    Assignee: Eastman Kodak Company
    Inventors: Jeffrey S. Gerstenberger, Keith A. Hadley, Manh Tang
  • Patent number: 8439487
    Abstract: A method for creating composite droplets for use in an ink jet system includes a first fluid (1) brought into contact with a second fluid within a set of channels (5,14). The interface between the fluids is characterized by an interfacial tension. The first fluid forms spaced droplets (8) within the second fluid, the composite of the first and second fluids passing through an orifice (6) to form a jet (9).
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: May 14, 2013
    Assignee: Eastman Kodak Company
    Inventors: Andrew Clarke, John M. Higgins, Andrew M. Howe, Danuta Gibson, Stephanie V. Desrousseaux
  • Patent number: RE45067
    Abstract: The invention concerns a contactless numerical printing machine for products of average fluidity, such as varnish, glue, and conducting or scratchable ink, onto a substrate of variable thickness and dimensions. The machine includes a special device for printing without contact by projection. The projected materials are materials of average fluidity or composed of large-dimension molecules. The process used includes an electro-acoustic device for control of the projection, and a multiplicity of projection nozzles, each controlled individually. The machine also includes a production chain with different work stations, whose printing devices are controlled by a computer management system. The production chain allows printing with a certain precision in given zones located during the processing by an appropriate work station.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: August 12, 2014
    Assignee: MGI France
    Inventors: Edmond Abergel, Raphael Renaud