Plural Pulses Patents (Class 347/11)
  • Patent number: 10889110
    Abstract: A method for depositing droplets onto a medium, utilising a droplet deposition head is provided. The head used in the method includes: an array of fluid chambers separated by interspersed walls, each fluid chamber communicating with an aperture for the release of fluid droplets and each wall separating two neighbouring chambers. Each wall is actuable such that, in response to a first voltage, it will deform so as to decrease the volume of one chamber and increase the volume of the other chamber, and, in response to a second voltage, it will deform so as to cause the opposite effect on the volumes of its neighbouring chambers.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: January 12, 2021
    Assignee: XAAR TECHNOLOGY LIMITED
    Inventors: Nicholas Marc Jackson, Angus Condie
  • Patent number: 10882311
    Abstract: A print head includes a piezoelectric element that includes a first electrode supplied with a drive signal and a second electrode supplied with a reference voltage signal and is displaced by a difference in electric potential between the first electrode and the second electrode, a cavity that is filled with a liquid ejected from a nozzle along with the displacement of the piezoelectric element, a vibration plate that is disposed between the cavity and the piezoelectric element, a switch circuit that switches between supplying and not supplying the drive signal to the first electrode, and a low pass filter circuit that is electrically connected in parallel with the switch circuit.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: January 5, 2021
    Inventors: Tomoko Hara, Motonori Chikamoto
  • Patent number: 10875307
    Abstract: A method for manufacturing a device for ejecting a fluid, including the steps of: forming, in a first semiconductor wafer that houses a nozzle of the ejection device, a first structural layer; removing selective portions of the first structural layer to form a first portion of a chamber for containing the fluid; removing, in a second semiconductor wafer that houses an actuator of the ejection device, selective portions of a second structural layer to form a second portion of the chamber; and coupling together the first and second semiconductor wafers so that the first portion directly faces the second portion, thus forming the chamber. The first portion defines a part of volume of the chamber that is larger than a respective part of volume of the chamber defined by the second portion.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: December 29, 2020
    Assignee: STMICROELECTRONICS S.r.l.
    Inventors: Domenico Giusti, Marco Ferrera, Carlo Luigi Prelini, Mauro Cattaneo, Andrea Nomellini
  • Patent number: 10875295
    Abstract: A print head includes a piezoelectric element that includes a first electrode supplied with a drive signal and a second electrode supplied with a reference voltage signal and is displaced by a difference in electric potential between the first electrode and the second electrode, a cavity that is filled with a liquid ejected from a nozzle along with the displacement of the piezoelectric element, a vibration plate that is disposed between the cavity and the piezoelectric element, a low pass filter circuit that is supplied with the drive signal, a first switch circuit that switches between supplying and not supplying the drive signal to the first electrode, and a second switch circuit that switches between supplying and not supplying the drive signal after passing through the low pass filter circuit to the first electrode.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: December 29, 2020
    Inventors: Tomoko Hara, Motonori Chikamoto
  • Patent number: 10815474
    Abstract: This system combines 3D printing technology with artificially modified cells for production of nonliving biomaterials. A 3D printer deposits a 3D array of bioengineered cells in the shape of a selected product. The cells are programmed to produce biomaterials in regulated amounts. The cell array deposits biomaterials onto a substrate. The cells and substrate are then removed, leaving a finished, nonliving product with microscale structure and precision.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: October 27, 2020
    Assignee: United States of America as Represented by the Administrator of NASA
    Inventors: Diana M. Gentry, Christopher E. Venter, Lynn J. Rothschild
  • Patent number: 10796441
    Abstract: A method of image-distance transformation using bi-directional scans is provided. The method includes the steps of: performing a first scan on each pixel of an input image using a first mask in a first order to generate an intermediate image; and performing a second scan on each pixel of the intermediate image using a second mask in a second order to obtain distance information of each pixel in the input image. A first current pixel in the input image that is not compared with prior pixels in the first order and in a first current segment is used in the first comparison process in the first scan, and a second current pixel that is compared with prior pixels in the second order and in a second segment is used in the second comparison process in the second scan.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: October 6, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Sze-Yeong Tan
  • Patent number: 10744760
    Abstract: An image processing apparatus configured to generate, based on image data corresponding to a printing image, print data for causing a printer to execute printing includes an input unit (input device, display device) configured to receive, for each of the first ink and the second ink, an ink discharge correction volume for correcting an ink volume discharged from predetermined nozzles among a plurality of first nozzles and a plurality of second nozzles, and a print data generating unit (printer driver) configured to generate the print data based on the image data and the ink discharge correction volume input.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: August 18, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Shun Sakaihara, Naoki Maruyama
  • Patent number: 10682863
    Abstract: In a configuration having a circulation flow path in association with an ejection element, a liquid ejecting apparatus is capable of circulating liquid suitably and maintaining stable ejection operation while reducing liquid vaporization, a power supply capacity, and the effect of noise. For this purpose, in a configuration in which liquid delivery mechanisms that facilitate a flow in a flow path are prepared in association with pressure chambers, the liquid delivery mechanisms are divided into a plurality of blocks and the liquid delivery mechanisms included in each of the blocks are driven at different timings.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 16, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuro Yamazaki, Toru Nakakubo, Kazuhiro Yamada, Yoshiyuki Nakagawa, Akiko Hammura
  • Patent number: 10675864
    Abstract: A printing apparatus receives, as serial data, a plurality of commands for driving a printhead including arrayed print elements to perform printing. Then, a first signal is internally generated in the apparatus, and a second signal is generated based on the position of a conveyed print medium. In addition, each command is extracted from the received serial data. While switching over the first and second signals based on each command, the printhead is driven to perform a preparation operation prior to image printing by the printhead based on the first signal and to print an image based on image data on the print medium based on the second signal. Upon switchover of the first signal to the second signal, switchover to the second signal is controlled after disabling the first signal for a predetermined period.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 9, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takuji Katsu
  • Patent number: 10654264
    Abstract: A printing system includes a printing apparatus and a printing control apparatus for creating image data to be printed. The printing apparatus has a print head having an array of printing elements, a conveying unit for conveying a print medium in a direction intersecting with the array direction, and a control unit for setting the conveying speed. The printing control apparatus has an acquisition unit for acquiring a maximum concurrent drive number in the printing elements based on image data, an adjustment value for adjusting an inclination of a print position of the print head with respect to the conveying direction, and a maximum value and minimum value of an adjustment value for adjusting a print position of the print head in the array direction. The control unit sets the conveying speed based on the acquired maximum concurrent drive number.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: May 19, 2020
    Assignee: Canon Finetech Nisca Inc.
    Inventors: Yusuke Tanaka, Daichi Nitta
  • Patent number: 10643642
    Abstract: An apparatus comprises a main pole, a trailing shield, a write-field-enhancing structure, a write coil, a write current control circuit configured to supply a write current to the write coil to record a bit to a magnetic medium, and a driving current control circuit configured to supply a driving current to the write-field-enhancing structure, wherein the driving current comprises a driving pulse, and wherein the driving current comprises an AC component with a duty cycle selected based at least in part on a power constraint. A method of writing to a magnetic medium comprises supplying a write current to a write coil of a magnetic write head, and supplying a driving current to a free layer disposed in a write gap between a main pole and a trailing shield, wherein the driving current comprises an AC component with a duty cycle based at least in part on a power constraint.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: May 5, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Gonçalo Marcos Baião De Albuquerque, Yunfei Ding, Alexander Goncharov, Kuok San Ho, Daniele Mauri, Goran Mihajlovic, Suping Song, Petrus Antonius Van Der Heijden
  • Patent number: 10632745
    Abstract: An inkjet head comprises a pressure chamber that stores liquid; an actuator that changes a volume of the pressure chamber in response to an applied driving signal; and an applying section that applies the driving signal to the actuator. The driving signal includes a discharge pulse and an oscillation pulse. The discharge pulse enables liquid to be discharged from a nozzle communicating with the pressure chamber. The oscillation pulse is applied before the discharge pulse and has a potential opposite in polarity to that of the discharge pulse to generate pressure oscillation for promoting discharge of the liquid in the liquid. When the driving signal includes two or more successive discharge pulses, a cycle of the discharge pulse is 1.5 times or more and 2.5 times or less as long as a half cycle of a main acoustic resonance frequency of the liquid in the pressure chamber.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: April 28, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Yasuhito Kiji
  • Patent number: 10611146
    Abstract: A method of operating a drop-on demand (DOD) jetting device having a nozzle, a pressure chamber filled with a liquid and connected to the nozzle and an actuator energized by a drive signal, wherein a periodic DOD signal determines whether or not a droplet is jetted out from the nozzle in a given DOD period, and the drive signal has a waveform configured to cause the actuator to excite a pressure wave in the liquid, the method further comprising the steps of a) energizing the actuator with a waveform that has a fixed pattern and extends over a time interval that is longer than the given DOD period; and b) ignoring the DOD signal in at least the first DOD period that follows after said period for which the step a) has been performed.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: April 7, 2020
    Assignee: CANON PRODUCTION PRINTING HOLDING B.V.
    Inventors: Cornelis W. M. Venner, Johannes M. M. Simons
  • Patent number: 10603908
    Abstract: A first drive waveform for causing a liquid to be discharged from a first discharge unit and performing printing becomes a first potential during a first period, becomes a fourth potential during a second period, and becomes the first potential during a third period. A second drive waveform for inspecting the first discharge unit becomes a second potential during a fourth period, becomes a third potential during a fifth period, and becomes the second potential during a sixth period, where the third potential is lower than the fourth potential and the first potential.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: March 31, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Toshiyuki Suzuki
  • Patent number: 10603901
    Abstract: A printer as an example of a liquid discharging apparatus includes a nozzle, a drive signal generation unit that generates a drive signal for driving a piezoelectric element, and a discharge abnormality detection unit that detects a change of an electromotive force of the piezoelectric element, which is caused by residual vibration in a cavity after the drive signal is supplied. The drive signal generation unit generates a first drive signal for checking whether or not a first discharge abnormality caused by a foreign substance adhering to a surface on which the nozzle opens occurs and a second drive signal for checking whether or not a second discharge abnormality caused by a cause other than the foreign substance occurs. The potential change for detecting the first drive signal is greater than the potential change for detecting the second drive signal.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: March 31, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Shinkawa, Yasuhiro Hosokawa, Noriaki Saito
  • Patent number: 10549529
    Abstract: According to one embodiment, a driving device includes a head driver configured to generate and apply a driving signal to an actuator for ejecting a liquid from a pressure chamber connected to a nozzle, the driving signal including a contraction pulse, the contraction pulse causing the actuator to contract a volume of the pressure chamber, and end application of the contraction pulse when a flow rate of the liquid from the nozzle has a negative value in a liquid ejection direction from the nozzle.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: February 4, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Jun Takamura, Yasuhito Komai, Takanori Gomi
  • Patent number: 10535810
    Abstract: A control apparatus controls driving of an oil feeding unit. The oil feeding unit includes a piezoelectric body that deforms in response to a voltage applied thereto, and a reservoir to store lubricating oil. The capacity of the reservoir changes in accordance with deformation of the piezoelectric body so as to discharge lubricating oil from the oil feeding unit. The control apparatus includes N driving circuits 71a to 71n configured to apply voltages to the piezoelectric body (where N is an integer equal to or greater than two). The N driving circuits 71a to 71n are connected in parallel to the piezoelectric body. During oil feeding, the control apparatus uses a predetermined number of the driving circuits selected from the N driving circuits. The predetermined number is smaller than N.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: January 14, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Yoshimichi Higashiyama, Masami Naka, Tsukasa Sakazaki
  • Patent number: 10513111
    Abstract: A drive circuit (100) for driving actuators of a printhead (97) from a common drive waveform has a switching circuit (32) for coupling the common drive waveform to an actuator (1,2), and a timing circuit (10) to control the switching circuit to form a drive pulse from the common drive waveform. The drive pulse is trimmed by controlling a duration (TTRIM) of a step at an intermediate level (VHOLD) in the drive pulse. This can improve the trade-off between available range of trimming and thermal efficiency because the voltage drop across the switching circuit can be reduced, compared to trimming only the height. Decoupling during a flat portion of the common drive waveform can enable the timing of the decoupling to be more relaxed compared to decoupling during a slope. Such relaxing can enable costs, complexity and thermal loading to be reduced.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: December 24, 2019
    Assignee: XAAR TECHNOLOGY LIMITED
    Inventors: Anirban Lahiri, Mujahid-ul Islam, Mario Massucci, Ian Anthony Hurst, Stephen Mark Jeapes, Neil Christopher Bird, Anthony Saugey
  • Patent number: 10388305
    Abstract: Disclosed herein are apparatuses and methods for writing to a magnetic medium, and data storage devices comprising such apparatuses and methods. An apparatus comprises a main pole, a trailing shield, a write-field-enhancing structure, a write coil, a write current control circuit configured to supply a write current to the write coil to record a bit to a magnetic medium, and a driving current control circuit configured to supply a driving current to the write-field-enhancing structure, wherein the driving current comprises a driving pulse. A method of writing to a magnetic medium comprises supplying a write current to a write coil of a magnetic write head, and supplying a driving current to a free layer disposed in a write gap between a main pole and a trailing shield of the magnetic write head, wherein the driving current comprises an AC component.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: August 20, 2019
    Assignee: Western Digital Technologies, Inc.
    Inventors: Gonçalo Marcos Baião De Albuquerque, Yunfei Ding, Alexander Goncharov, Kuok San Ho, Daniele Mauri, Goran Mihajlovic, Suping Song, Petrus Antonius Van Der Heijden
  • Patent number: 10369562
    Abstract: A droplet ejecting apparatus includes a solution container, first and second nozzle groups fluidly connected to the solution container and having nozzles from which the solution can be ejected, first actuators respectively associated with each nozzle in the first nozzle group, second actuators respectively associated with each nozzle in the second nozzle group, and drive circuits respectively connected in a parallel to the first and second actuators. Each nozzle has a pressure chamber associated therewith. Each actuator causes a pressure change in a corresponding pressure chamber to control an ejection of a droplet of the solution from the corresponding nozzle. Each drive circuit is configured to supply a drive signal. When supplied by each drive circuit to the first and second actuators respectively, each drive signal causes solution to be ejected from each nozzle of each respective nozzle group at a same time.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: August 6, 2019
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Shuhei Yokoyama, Satoshi Kaiho, Ryutaro Kusunoki
  • Patent number: 10300695
    Abstract: An ink jet printer includes an ink jet head and an ink jet head control circuit supplying a control signal to control the ink jet head. The ink jet head includes a nozzle, an ink chamber, an actuator configured to change a pressure of the ink chamber to eject ink from the nozzle, a driver circuit that is connected to a signal line on which the control signal is supplied and configured to generate a drive waveform for driving the actuator according to the control signal, and a non-volatile memory connected to the signal line and configured to store information of the ink jet head. The ink jet head control circuit includes a drive control circuit connected to the signal line and configured to output the control signal to the signal line, and a non-volatile memory control circuit that accesses the non-volatile memory via the signal line.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: May 28, 2019
    Assignee: Toshiba TEC Kabushiki Kaisha
    Inventors: Teruyuki Hiyoshi, Noboru Nitta, Syunichi Ono
  • Patent number: 10286653
    Abstract: Printheads and techniques for manufacturing printheads are disclosed. An example method includes forming drive circuit components in a circuit layer. The method also includes forming a fluidic device that causes fluid to be ejected from a nozzle. The method also includes forming an interconnect layer that couples the drive circuit components.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: May 14, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Eric T Martin, Chris Bakker, James R Przybyla
  • Patent number: 10272697
    Abstract: In a printer, a print head carriage assembly includes a carriage arranged to move in a main scanning direction relative to a recording medium; a plurality of print heads mounted on the carriage and arranged to apply a curable marking material onto the recording medium; and a number of curing devices mounted on the carriage and disposed in positions relative to the print heads such that each print head is associated with at least one of the curing devices. The at least one of the curing devices is disposed to follow its associated print head in a distance in the main scanning direction so as to cure the ink that has been applied with that print head. The print heads are arranged in at least two rows which extend in the main scanning direction and are staggered in a sub-scanning direction normal to the main scanning direction, and the print heads are grouped such that each print head in each row has, in each other row, a counterpart print head which belongs to the same group.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: April 30, 2019
    Assignee: OCÉ HOLDING B.V.
    Inventors: Richard F. E. Van Hout, Johan Schutten, Elisabeth H. G. Beckers-Vaasen, John B. L. De Kock, Marcellus W. P. Van De Put, Mark M. J. Gosens
  • Patent number: 10239313
    Abstract: An inkjet head drive apparatus comprises a pressure chamber, an actuator, a nozzle and a drive signal output section. The pressure chamber accommodates an ink. The actuator increases or decreases volume of the pressure chamber through an applied a voltage. The nozzle is connected with the pressure chamber to eject the ink through the change in the volume of the pressure chamber. When an ejection pulse for the ejection of the ink from the nozzle is repeated for equal to or greater than three times, the drive signal output section outputs a drive signal having a driving waveform including an initial ejection pulse having a first voltage amplitude and the second ejection pulses and the pulses thereafter having a second voltage amplitude smaller than the first voltage amplitude to the actuator.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: March 26, 2019
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Yasuhito Kiji, Ryutaro Kusunoki
  • Patent number: 10220615
    Abstract: A method for controlling a liquid ejecting apparatus includes: driving a ejecting section by using each of a plurality of candidate waveforms of a minute vibration pulses in parallel with movement of a liquid ejecting head, the minute vibration pulses vibrates a liquid surface within a nozzle of the liquid ejecting head without causing liquid to be ejected from the nozzle, the candidate waveforms are different from each other; and setting a waveform of the minute vibration pulses included in a driving signal generated by the signal generating section, in accordance with an instruction accepted with an operating device.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: March 5, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Ryota Sakamoto
  • Patent number: 10214010
    Abstract: A driving signal generating circuit generates, for each driving period, a main driving signal including a first sub driving signal including a first driving pulse, a second sub driving signal including a second driving pulse, and a third sub driving signal including a third driving pulse. The third sub driving signal follows the second sub driving signal. A driving signal supplying circuit includes a second dot former to supply the second sub driving signal and the third sub driving signal to an actuator coupled to a defining plate defining a portion of a pressure chamber, without supplying the first sub driving signal to the actuator. The third driving pulse starts after a lapse of a preset time from the start of the second driving pulse. The preset time is equal to a value of about p×Tc, where p is greater than 2.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: February 26, 2019
    Assignee: ROLAND DG CORPORATION
    Inventors: Keisuke Misawa, Kenji Kazaoka
  • Patent number: 10195847
    Abstract: A liquid jetting apparatus includes: a head including nozzles and driving elements arranged to correspond to the nozzles; a power source connected to the driving elements; and a control circuit connected to the power source. The control circuit determines whether an output voltage value of the power source is changed from a first voltage value to a second voltage value. When the control circuit has determined that the output voltage value is changed from the first voltage value to the second voltage value, the control circuit calculates an absolute value of a difference between the first voltage value and the second voltage value and compares the absolute value of the difference and a threshold value. When the absolute value of the difference is equal to or more than the threshold value, the control circuit determines a calculation voltage value smaller than the absolute value of the difference.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: February 5, 2019
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Fumika Hatta
  • Patent number: 10189252
    Abstract: Methods and systems are described herein for driving droplet ejection devices with multi-level waveforms. In one embodiment, a method for driving droplet ejection devices includes applying a multi-level waveform to the droplet ejection devices. The multi-level waveform includes a first section having at least one compensating edge and a second section having at least one drive pulse. The compensating edge has a compensating effect on systematic variation in droplet velocity or droplet mass across the droplet ejection devices. In another embodiment, the compensating edge has a compensating effect on cross-talk between the droplet ejection devices.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 29, 2019
    Assignee: FUJIFILM DIMATIX, INC.
    Inventors: Hrishikesh V. Panchawagh, Christoph Menzel
  • Patent number: 10166766
    Abstract: A head driving device drives a liquid ejection head. The liquid ejection head includes a plurality of nozzles and a plurality of pressure generating devices provided respectively corresponding to the nozzles. The head driving device includes a driving-waveform correcting unit configured to correct driving waveform data that defines ejection characteristics of liquid to be ejected from the nozzle based on interference patterns expressing variations in the ejection characteristics caused by an interference occurring in the nozzle.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: January 1, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Naruhiro Masui
  • Patent number: 10137686
    Abstract: An ink jet head includes a pressure chamber connected to a nozzle, an actuator configured to cause liquid in the pressure chamber to be ejected from the nozzle by deforming a wall of the pressure chamber, and a drive circuit configured to apply voltage to the actuator to drive the actuator. When a droplet of the liquid is ejected from the nozzle, the voltage applied to the actuator is changed from a first value to a second value that causes the pressure chamber to expand, and then changed from a third value that is equal to the second value or between the first value and the second value to the first value after a time period ?, which is a primary natural oscillation period of the actuator when the pressure chamber and the nozzle are filled with the liquid.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: November 27, 2018
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Ryutaro Kusunoki, Shuhei Yokoyama, Meng Fei Wong
  • Patent number: 10131142
    Abstract: In accordance with an embodiment, an inkjet head comprises a pressure chamber, an actuator and a control section. The pressure chamber houses ink. The actuator is driven to expand or contract the volume of the pressure chamber in order to eject the ink from an opening of the pressure chamber. The control section applies an expansion pulse of which the width is 0.4 times-0.9 times as large as an AT which is half a natural vibration period during which nozzle negative pressure is changed in the pressure chamber and which expands the pressure chamber to the actuator, and applies a contraction pulse which contracts the pressure chamber to the actuator.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: November 20, 2018
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Masaya Ichikawa
  • Patent number: 10046558
    Abstract: A method for recovering missing inkjets in a printhead including determining an inkjet in the printhead is not ejecting ink, purging degassed ink into the printhead, adjusting a pressure in the printhead so that ink drools out of an aperture of each nozzle of the printhead, repeatedly applying a non-firing waveform at a frequency for a predetermined amount of time to the printhead while the ink drools out of the aperture of each nozzle of the printhead, and after the predetermined amount of time, adjusting the pressure in the printhead to a normal printhead pressure.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: August 14, 2018
    Assignee: XEROX CORPORATION
    Inventor: Douglas Dean Darling
  • Patent number: 10029485
    Abstract: An ink jet recording method uses an ink jet recording apparatus including a plurality of heads arranged in parallel in a first direction, each of which ejects droplets of a different radiation-curable ink composition onto a recording medium, and first light sources provided for corresponding heads so as to be disposed at a predetermined side of the corresponding heads. The first light sources emit active radiation to irradiate the droplets on the recording medium. The method includes ejecting droplets of the ink compositions from the heads onto the recording medium, and performing a first irradiation by irradiating the droplets of each ink composition with the active radiation from the corresponding first light source at an irradiation energy within 500 ms after the droplets have landed. The irradiation energy is in the range of 5% to 10% of the energy E90 at which the ink composition is 90% cured.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: July 24, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Taketoshi Kagose, Satoru Miura
  • Patent number: 10022962
    Abstract: A fluidic die may include a number of actuators. The number of actuators form a number of primitives. The fluidic die may include a digital-to-analog converter (DAC) to drive a number of the delay circuits. The delay circuits delay a number of activation pulses that activate the actuators associated with the primitives to reduce peak power demands of the fluidic die. A number of delay circuits may be coupled to each primitive.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: July 17, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Scott A. Linn, George H. Corrigan, III, Michael W. Cumbie
  • Patent number: 9981468
    Abstract: An ink jet printing apparatus is provided which can suppress defective ejection of ink from the nozzles. An element array with a plurality of print elements arranged therein is divided into a plurality of groups of print elements. For each of the plurality of groups, the apparatus determines whether any area undergoes a failure to perform a normal printing operation. If the apparatus determines, for any of the plurality of groups, that any area is likely to undergo the failure, when the print medium is printed based on the print data corresponding to the area, control is performed in such a manner that a first amount of energy supplied to drive one print element is greater than a second amount of energy supplied to drive one print element immediately before the print medium is printed based on the print data corresponding to the area.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: May 29, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Joji Katsuura
  • Patent number: 9969157
    Abstract: A fluidic die may include a number of actuators. The number of actuators form a number of primitives. The fluidic die may include a digital-to-analog converter (DAC) to drive a number of the delay circuits. The delay circuits delay a number of activation pulses that activate the actuators associated with the primitives to reduce peak power demands of the fluidic die. A number of delay circuits may be coupled to each primitive.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: May 15, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Scott A. Linn, George H. Corrigan, III, Michael W. Cumbie
  • Patent number: 9956768
    Abstract: A liquid ejection device includes a head driving unit that generates a first driving voltage and a second driving voltage in which whether or not there is ejection of liquid from a first ejection element in a case where the first driving voltage alone is applied to the first ejection element that is a detection target of a short circuit between ejection elements is different from whether or not there is ejection of liquid from the first ejection element in a case where the first driving voltage and the second driving voltage are applied to the first ejection element, supplies the first driving voltage to the first ejection element, and supplies the second driving voltage to the second ejection element suspected of a short circuit with the first ejection element.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: May 1, 2018
    Assignee: FUJIFILM Corporation
    Inventor: Tadashi Kyoso
  • Patent number: 9925772
    Abstract: A method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the method having a discharging step of performing continuous application to a piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element and thereby discharge ink in an ink chamber 22 from an opening portion 21, and a vibrating step of performing application of the piezoelectric elements 23 to all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: March 27, 2018
    Assignee: MIYAKOSHI PRINTING MACHINERY CO., LTD.
    Inventors: Hideo Izawa, Yasushi Katagiri, Seiji Komatsuda
  • Patent number: 9844934
    Abstract: A liquid jetting device comprising a plurality of ejection units each of which is arranged to eject a droplet of a liquid and comprises a nozzle, a liquid duct connected to the nozzle and an electro-mechanical transducer arranged to create an acoustic pressure wave in the liquid in the duct, the device further comprising an electronic control system arranged to receive a pressure signal from at least one of the transducers and to generate a transducer control signal on the basis of the received pressure signal and to control the transducers of said plurality of ejection units to operate in a mode of operation selected from a variety of different modes of operation, wherein the control system is arranged to detect an acoustic property of the liquid of the basis of the received pressure signal and to select the mode of operation in accordance with the detected property, the control system being arranged to deliver transducer control signals to the transducers, which control signals are derived from a common bas
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: December 19, 2017
    Assignee: OCE-TECHNOLOGIES B.V.
    Inventors: Hylke Veenstra, Theo Hummel, Amol Khalate, Cor Venner, Marko Mihailovic
  • Patent number: 9815279
    Abstract: An inkjet head drive apparatus comprises a pressure chamber, an actuator, a nozzle and a drive signal output section. The pressure chamber accommodates an ink. The actuator increases or decreases volume of the pressure chamber through an applied a voltage. The nozzle is connected with the pressure chamber to eject the ink through the change in the volume of the pressure chamber. When an ejection pulse for the ejection of the ink from the nozzle is repeated for equal to or greater than three times, the drive signal output section outputs a drive signal having a driving waveform including an initial ejection pulse having a first voltage amplitude and the a second ejection pulses and the pulses thereafter having a second voltage amplitude smaller than the first voltage amplitude to the actuator.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: November 14, 2017
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Yasuhito Kiji, Ryutaro Kusunoki
  • Patent number: 9796175
    Abstract: A controller adapted for an inkjet printing system is described. The controller can include an analyzer and a prefire inserter. The analyzer can be configured to determine whether a nozzle arrangement should generate a fire pulse in a current line, and whether the last preceding fire pulse was further in the past than an interval value threshold N. The prefire inserter can be configured to insert one or more prefire pulses into the N lines before the current line.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: October 24, 2017
    Assignee: Océ Holding B.V.
    Inventors: Timo Sponer, Martin Wilhelm
  • Patent number: 9776436
    Abstract: A method for controlling a print device by generating a firing encoder signal from varying one or more characteristics of a reference signal where, the one or more characteristics are varied based on at least the position of a print medium at a reference time. The firing encoder signal is used to synchronize firing of at least one print head of the print device after the reference time.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: October 3, 2017
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: David Chanclon, Alberto Borrego Lebrato, Juan Francisco Redondo Del Campo
  • Patent number: 9776401
    Abstract: A droplet ejection apparatus includes, a droplet ejection head, wherein the droplet ejection head includes a nozzle communicated with a pressure chamber, a first piezoelectric element configured to pressure liquid in the pressure chamber so as to cause a droplet to be ejected, and a second piezoelectric element capable of pressuring the liquid in the pressure chamber, a first drive waveform generation unit configured to generate a first drive waveform to be applied to the first piezoelectric element, a second drive waveform generation unit configured to generate a second drive waveform to be applied to the second piezoelectric element, and a control unit configured to apply the second drive waveform to the second piezoelectric element after the first piezoelectric element is driven due to the applied first drive waveform. Residual vibration of the liquid in the pressure chamber is suppressed by a vibration caused by the second piezoelectric element.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: October 3, 2017
    Assignee: Ricoh Company, Ltd.
    Inventor: Hirohito Murate
  • Patent number: 9738069
    Abstract: A driving pulse to be applied to a plurality of print elements in a print element array is decided based on the deviation of the discharge amount from the print elements.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: August 22, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuhei Oikawa, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Hiroshi Taira, Yosuke Ishii, Satoshi Azuma, Hiroaki Komatsu, Kazuhiko Sato
  • Patent number: 9718269
    Abstract: The uniformity of performance of inkjet nozzles within a print head containing a plurality of said nozzles is optimized by characterizing one or more performance attributes of the nozzles within said print head. A waveform set is generated that comprises a plurality of waveforms to compensate for variations of the one or more performance attributes among the nozzles. One of the waveforms within the waveform set is assigned to each nozzle to optimize the one or more performance attributes of each nozzle relative to each other nozzle in the print head. Based upon the waveform assigned to each nozzle, each nozzle in the print head responds substantially uniformly relative to each other nozzle in the print head.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: August 1, 2017
    Assignee: ELECTRONICS FOR IMAGING, INC.
    Inventor: John Duffield
  • Patent number: 9701109
    Abstract: When the discharging abnormalities detection circuit detects a state in which the ink droplet is not discharged from the first nozzle which discharges a relatively large ink droplet, a second recording mode is set, and in a recording process, the ink droplet discharges from a second nozzle without discharging the ink droplet from a first nozzle.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: July 11, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Eiichiro Watanabe
  • Patent number: 9701117
    Abstract: A liquid-jet head includes: a passage member including a plurality of individual passages and a manifold communicating commonly with the individual passages, the individual passages each having a pressure generating chamber communicating with a nozzle orifice that ejects liquid, the pressure generating chambers being formed on one surface side of the passage member on an opposite side from the nozzle orifices, the individual passages and the manifold communicating with each other through communicating paths, and each adjacent two of the individual passages communicating with each other through the corresponding communicating path; and reinforcement walls each provided between the communicating paths in a parallel direction of the individual passages, the reinforcement walls defining the communicating paths.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: July 11, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hajime Nakao, Takaaki Koizumi
  • Patent number: 9682548
    Abstract: A print device is configured to perform printing by an ink jet scheme including: an ink jet head including a nozzle, an ink chamber that stores ink droplets at an upstream of the nozzle, and a piezoelectric element; and a drive signal output section that outputs a drive signal for causing the piezoelectric element to be displaced. The drive signal includes a discharge driving signal for causing the piezoelectric element displaced so that ink droplets are discharged from the nozzle, and a post-discharge controlling signal for causing the piezoelectric element displaced after the ink droplets are discharged from the nozzle, the drive signal output section outputs the discharge driving signal by which a voltage changes linearly from a first voltage to a second voltage which are predeterminedly set, at a timing when the ink droplets are to be discharged from the nozzle, and outputs a substantial sine wave.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: June 20, 2017
    Assignee: MIMAKI ENGINEERING CO., LTD.
    Inventor: Masaru Ohnishi
  • Patent number: 9649845
    Abstract: A liquid jetting apparatus includes a casing, a tank formed with a liquid storage chamber which stores liquid, an inlet which allows the liquid to be poured into the liquid storage chamber, and a liquid outflow channel which allows the liquid to flow out from the liquid storage chamber, a conveying mechanism which conveys a recording medium along a conveying path extending in a front-rear direction, a carriage which moves in a left-right direction, and a head mounted on the carriage and having a nozzle which jets the liquid onto the recording medium conveyed by the conveying mechanism. The tank, the conveying path, and the carriage are arranged inside the casing, the tank is arranged outside the conveying path in the left-right direction, and at least a part of the tank is arranged inside both ends of a movement area of the carriage in the left-right direction.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: May 16, 2017
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Yoshinori Osakabe, Tomohisa Higuchi, Akira Shinoda, Akinori Igarashi, Suguru Tomoguchi, Hisaki Sakurai
  • Patent number: 9630408
    Abstract: An inkjet head that is able to circulate ink. The inkjet head includes a diaphragm plate, a first restrictor plate, one or more chamber plates, a second restrictor plate, and an orifice plate. The orifice plate forms a plurality of nozzles. The chamber plates form a plurality of chambers corresponding with the nozzles, and also form a return manifold for receiving ink from the chambers when circulating the ink through the inkjet head. The diaphragm plate forms a diaphragm that seals the chambers. The first restrictor plate controls a flow of ink between the chambers and the return manifold to circulate the ink through the inkjet head. The second restrictor plate controls the flow of ink between a supply manifold and the chambers.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: April 25, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Nishimura, Giang Vo, Connor Matsumori