Purging Without A Cap Patents (Class 347/35)
  • Patent number: 10239318
    Abstract: A liquid discharge apparatus includes a plurality of pressure chambers that generate a pressure for discharging a liquid, a plurality of nozzles that communicate individually with the pressure chambers and that discharge the liquid, a common liquid chamber that includes a plurality of supply openings and that has, at an end portion side in an arrangement direction of the supply openings, a region in which flow speed of the liquid flowing toward the supply openings is higher than in another region, and a controller that controls a maintenance by expelling the liquid from the nozzles. During the maintenance, the controller controls expelling the liquid from a first nozzle to a second nozzle that is one of nozzles located on the end portion side of the first nozzle in the arrangement direction of the supply openings, in an order of the first nozzle to the second nozzle.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 26, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Hitoshi Takaai, Shunsuke Watanabe, Shingo Tomimatsu, Kohei Yuwaki
  • Patent number: 10118395
    Abstract: A discharger is configured to discharge liquid in a liquid channel to outside the liquid channel. The liquid is at least one of first liquid and second liquid different from the first liquid. An agitator is configured to agitate the liquid in the liquid channel. When executed by a processor, instructions cause the processor to perform: an introducing process of, when the second liquid exists in the liquid channel, controlling the discharger to discharge the second liquid to outside the liquid channel and to introduce the first liquid from the tank into the liquid channel; an agitating process of, after the introducing process, controlling the agitator to agitate the liquid in the liquid channel; and a discharging process of, after the agitating process, controlling the discharger to discharge the liquid in the liquid channel agitated by the agitator to outside the liquid channel.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: November 6, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Toshiro Ueda
  • Patent number: 10081200
    Abstract: A recording apparatus includes a recording head on which a plurality of nozzle rows are arranged in a width direction that intersects with a transfer direction; and a support section which includes a discarding section which includes a position which faces the nozzle rows and allows ink ejected by the recording head to pass therethrough, and a support surface which is disposed at a position which does not face the nozzle rows and is configured to support the paper sheet, wherein the support surface includes a first support surface which is disposed in a region which faces gaps between the nozzle rows in the width direction and a second support surface which extends in a region longer than a region in which the first support surface is disposed in the width direction, and the first support surface and the second support surface are formed to be flush with each other.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: September 25, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Kazunori Mori
  • Patent number: 10071572
    Abstract: A platen includes: a supporting portion that can support a sheet; a suction unit that sucks the sheet in such a manner as to attach the sheet to the supporting portion; a first ink receiver that receives ink ejected downstream of the leading end of the sheet passing the supporting portion; and a second ink receiver that receives ink ejected upstream of the trailing end of the sheet passing the supporting portion.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: September 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Takahide Onuma, Yasunori Saito, Arihito Miyakoshi, Masahiko Kubota, Yusuke Imahashi, Nobuhito Yamaguchi, Hiroshi Arimizu, Yoshinori Itoh
  • Patent number: 10029469
    Abstract: A recording apparatus includes a supporting portion that supports a sheet of paper transported and a recording head fixedly disposed at a position opposing the supporting portion, for recording. The recording head has nozzle rows for ejecting ink, and the nozzle rows are arranged side by side in the recording head in a direction intersecting a transport direction of the sheet. The supporting portion has a dumping portion including a position opposite the nozzle rows of the recording head, and the dumping portion is capable of receiving the ink ejected from the nozzle rows when the recording head performs flushing. The supporting portion has a supporting surface capable of supporting the sheet at a position not opposite the nozzle rows of the recording head. A slope inclining relative to the supporting surface is disposed in at least part of the boundary region between the dumping portion and the supporting surface.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 24, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Kazunori Mori
  • Patent number: 10016983
    Abstract: An ink delivery device is described. The ink delivery device includes an ink die with a first surface. The ink delivery device also includes an overmold to encapsulate a number of surfaces of the ink die. The overmold has a second surface that is wider than the first surface. The second surface receives an adhesive to attach the ink delivery device to a printhead. The ink delivery device also includes an ink slot passing through the overmold and at least a portion of the ink die.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: July 10, 2018
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Chien-Hua Chen, Michael W Cumbie, Devin Alexander Mourey
  • Patent number: 9962941
    Abstract: A recording apparatus includes a discharge section configured to discharge an ink from a nozzle onto a medium, a common flow path configured to supply a liquid to the nozzle, an ink supply path configured to supply the ink to the common flow path, filling liquid supply paths configured to supply a filling liquid to the common flow path, an air release path configured to release air in the common flow path, and a switching between section configured to switch the opening and closing of the ink supply path, the filling liquid supply paths, and the air release path.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: May 8, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Goki Hiramoto
  • Patent number: 9931834
    Abstract: A printing control method for a printing apparatus that includes a controller, such that the controller: sets a plurality of first regions along a first direction on a print medium that is conveyed, and a plurality of second regions between two first regions of the plurality of first regions, on the basis of print data; and causes ink to be discharged from a print head to the plurality of first regions so as to print on the basis of the print data and also causes ink to be discharged from the print head to the second region determined on the basis of an indicator value for predicting poor discharging of ink in the print head.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: April 3, 2018
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Fumihiro Osakabe
  • Patent number: 9873258
    Abstract: A liquid-consuming apparatus includes: a tank including a liquid storage chamber configured to store a liquid, an inlet through which the liquid is poured into the liquid storage chamber, and a liquid flow channel configured to let the liquid flow therethrough from the liquid storage chamber; a cap configured to be attachable to the tank to cover the inlet; a cover configured to be movable relative to the tank between a closed position where a surface, of the tank, in which the inlet is formed is covered and an open position where the surface of the tank is exposed; and a holder configured to hold the cap removed from the tank. The cover is prevented from moving to the closed position by the cap held by the holder to be positioned in a movement area of the cover moving from the open position to the closed position.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: January 23, 2018
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Yoshinori Osakabe, Tomohisa Higuchi, Suguru Tomoguchi
  • Patent number: 9862188
    Abstract: An ink-jet printer, including: an ink-jet head; and a head moving device for moving the head in a scanning direction, wherein the ink-jet head includes a first head unit having a first nozzle row from which first ink is ejected and a second nozzle row from which second ink that differs in color from the first ink is ejected, a second head unit disposed so as to be shifted from the first head unit in a nozzle arrangement direction by a distance less than a nozzle pitch, and a third head unit disposed between the first and second head units in the scanning direction so as to be shifted from the first head unit in the nozzle arrangement direction by a distance corresponding to a predetermined natural number multiple of the nozzle pitch, the third head unit having fifth and sixth nozzle rows from which the first ink is ejected.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: January 9, 2018
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Hiroto Sugahara
  • Patent number: 9809036
    Abstract: A method is disclosed. The method includes analyzing an image of a first flushing pattern applied on a medium during production of a print job to detect presence of one or more defective ink jet nozzles and adjusting to a second flushing pattern during the production of the print job upon detecting the presence of one or more defective print head nozzles.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 7, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Kartheek Chandu, Carl Bildstein
  • Patent number: 9764561
    Abstract: An inkjet printer is operated to print an ink image and clear inkjets simultaneously. The inkjet printer delivers to a first inkjet in a printhead a first signal that ejects an ink drop from the first inkjet that corresponds to a pixel of an ink image stored in a memory of the printer and delivers to at least one other inkjet in the printhead a second signal that ejects an ink drop from the at least one other inkjet that does not correspond to a pixel of the ink image stored in the memory of the printer.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: September 19, 2017
    Assignee: Xerox Corporation
    Inventors: Edward F. Burress, Brent R. Jones
  • Patent number: 9597876
    Abstract: There is provide an ink-jet recording apparatus including: an ink containing a self-dispersible pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than five times a blending percentage by weight of the self-dispersible pigment in the ink.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: March 21, 2017
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Kenjiro Imai, Atsushi Nakamura
  • Patent number: 9517631
    Abstract: A liquid-consuming apparatus includes: a tank including a liquid storage chamber configured to store a liquid, an inlet through which the liquid is poured into the liquid storage chamber, and a liquid flow channel configured to let the liquid flow therethrough from the liquid storage chamber; a cap configured to be attachable to the tank to cover the inlet; a cover configured to be movable relative to the tank between a closed position where a surface, of the tank, in which the inlet is formed is covered and an open position where the surface of the tank is exposed; and a holder configured to hold the cap removed from the tank. The cover is prevented from moving to the closed position by the cap held by the holder to be positioned in a movement area of the cover moving from the open position to the closed position.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: December 13, 2016
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Yoshinori Osakabe, Tomohisa Higuchi, Suguru Tomoguchi
  • Patent number: 9498971
    Abstract: A controller controls an ink liquid feeding operation performed by an ink pump from a negative pressure tank to a pressure tank, and an ink replenishing operation performed by an ink replenisher according to a liquid level in each of the pressure tank and the negative pressure tank so that, during purging, the liquid level in each of the pressure tank and the negative pressure tank is maintained at a reference level.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: November 22, 2016
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Isao Matsushima
  • Patent number: 9493012
    Abstract: A droplet ejecting apparatus includes a liquid filling chamber filled with a liquid, and a plurality of pressure chambers in communication with the liquid filling chamber and filled with the liquid. Each of the pressure chambers includes a communication port in communication with the liquid filling chamber, a pressure generating element for exerting pressure on the liquid which fills the interior of each pressure chamber, and a nozzle for ejecting the liquid in each pressure chamber therefrom in the form of droplets. A recovery controller brings the pressure generating element corresponding to the communication port included in a partial region of the liquid filling chamber into operation to cause the corresponding nozzle to eject the droplets.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 15, 2016
    Assignee: SCREEN HOLDINGS CO., LTD.
    Inventor: Tamio Fukui
  • Patent number: 9475280
    Abstract: When a nozzle abnormality detecting mechanism detects an abnormality of the nozzle, in the maintenance process of causing the drive waveform to be applied plural times to the actuator corresponding to the nozzle that the detecting mechanism detects as being abnormal, and thereby causing the ejecting operation to be performed, at least a first-time drive waveform applied to the actuator is a flushing pulse which causes a meniscus in the nozzle not to be positively attracted from an initial position to the pressure chamber, but causes the meniscus to be extruded to the ejection side and thereby causes the liquid to be ejected from the nozzle.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: October 25, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Junhua Zhang
  • Patent number: 9427970
    Abstract: According to one example, there is provided a printing system having a print bar on which are installable multiple printheads. The system comprises a nozzle servicing module moveable across the length of the print bar to selectively perform a nozzle servicing operation on a group of printhead nozzles.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: August 30, 2016
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Gianni Cessel, Jose Luis Valero Navazo, Jeffrey Allen Wagner
  • Patent number: 9421774
    Abstract: An inkjet recording apparatus includes a conveyance section, a recording head, a maintenance mechanism, and a control section. The conveyance section conveys a recording medium. The recording head discharges ink droplets toward the recording medium while the conveyance section conveys the recording medium. The maintenance mechanism performs maintenance on the recording head. The control section causes the maintenance mechanism to operate upon determination that a width of a next recording target recording medium is greater than a width of a recording medium subjected to image recording prior to the next recording target recording medium.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: August 23, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Satoshi Tsunemi, Shinji Yoshinaga, Takeshi Watanabe, Hiroatsu Tamai, Hidenori Takenaka, Jumpei Hobo, Tomohisa Soda
  • Patent number: 9302488
    Abstract: A liquid ejecting apparatus, including: a tank for storing a liquid; a liquid ejecting head including an inner passage having an inlet, an outlet and individual liquid channels; a supply passage connecting the tank and inlet; a return passage connecting the tank and outlet; a supply device to forcibly supply the liquid in the tank to the inner passage; a restrictor valve to restrict a liquid amount flowing through the return passage; and a controller to drive the supply device while placing the restrictor valve in an open state, where the liquid in the tank returns back thereto via the supply passage, the inner passage, and the return passage, in order, and to drive the supply device to keep circulation and control the restrictor valve to restrict, during the circulation, the amount of the liquid that flows through the return passage, for discharging the liquid from the ejection opening.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: April 5, 2016
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Shuichi Tamaki
  • Patent number: 9296210
    Abstract: A liquid ejecting apparatus includes: a liquid ejecting unit that has a liquid ejecting head moving back and forth in a scanning direction, the liquid ejecting head being provided with a nozzle surface in which nozzles capable of ejecting liquid are formed; a wiping portion that wipes the nozzle surface; a liquid receiving portion that is capable of receiving the liquid ejected through the nozzles; and a maintenance portion that performs maintenance on the liquid ejecting head. Further, a receiving area where the liquid receiving portion is provided is disposed at a position that is adjacent to a wiping area where the wiping portion is provided and is more distanced from a landing area where the liquid ejected through the nozzles toward an ejection target medium lands than the wiping area in the scanning direction.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: March 29, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Keiji Matsumoto
  • Patent number: 9289981
    Abstract: An object is to provide a head drive unit that prevents an increase in viscosity of inks in nozzles even when a head is present outside an image forming region and also provide an inkjet printer, and the head drive unit includes: a drive signal output device 31 that outputs either a discharge signal or a meniscus oscillation signal to each head; a cycle generator 326 that generates a cyclic oscillation timing signal for the meniscus oscillation signal; an input interruption detector 324 that detects that input of a print timing signal is interrupted; and a drive signal selector 32 that selects the meniscus oscillation signal as a drive signal output from the drive signal output device and continuously applies the meniscus oscillation signal to all nozzles of each head in synchronization with an oscillation timing signal when interruption of the input of the print timing signal is detected.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: March 22, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Naoya Komada, Shingo Tsubotani
  • Patent number: 9218549
    Abstract: A number of printable images on a continuous sheet and printing throughput can be increased when printing an image in which images of different sizes coexist and are arranged. In a printing apparatus which prints a plurality of images by using a full-line inkjet printhead while conveying the sheet, the size of an image and a position of a sheet where the image is printed are analyzed from inputted image data. A necessary type of preliminary discharge is determined in accordance with the analysis result. Then, print data is generated by adding, to the image data, data for preliminary discharge complying with the determined type of preliminary discharge. It is controlled to print by the full-line printhead based on the generated print data.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Seiya Fujinaga
  • Patent number: 9168765
    Abstract: A printing apparatus includes a carriage configured to perform a reciprocating movement while facing a sheet, the carriage being equipped with an inkjet head, and a drying unit configured to apply energy from above the carriage to the sheet so as to dry ink, wherein, when the carriage performs the reciprocating movement, the carriage is reversed at a reversing position where the application of the energy to an end of the sheet or an end of an image formed on the sheet is not blocked by the carriage.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: October 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takuya Kawamura
  • Patent number: 9162508
    Abstract: An inkjet recording apparatus that performs preliminary discharge operation without a carriage and a recording medium interfering with each other is provided. The inkjet recording apparatus performs, at a center region in a conveyance direction of a recording medium, the preliminary operation at a position according to an edge portion of the recording medium obtained by an optical sensor. Further, the inkjet recording apparatus performs, at a leading edge region and a trailing edge region of a recording medium, the preliminary operation at a position based on input data.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: October 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Akiyoshi Sahara
  • Patent number: 9073311
    Abstract: An embodiment of this invention is directed to increasing the number of printable images on a continuous sheet and throughput when printing an image in which images of different sizes coexist and are arranged. Upon printing plural images by using a full-line inkjet printhead while conveying the sheet, the time during which no ink is discharged between successive images is analyzed from inputted image data for each nozzle of the printhead. Based on the analysis result, it is determined whether preliminary discharge is necessary during printing of the plural images. If preliminary discharge is necessary, print data to be used by the printhead is generated by adding, to the image data, data for preliminary discharge. Ink is discharged from the printhead based on the generated print data.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yumi Ikarashi
  • Patent number: 9044937
    Abstract: In a method to execute a printing interruption in a printing operation of an ink printing system in which a printing substrate is printed with at least one print head during the printing interruption in which a feed speed of the printing substrate web comes to a standstill, at least one vibration pulse is sent to the at least one print head to trigger vibration oscillations before a print controller loads print data into the at least one print head. Thereafter a print-start signal is sent to the at least one print head.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: June 2, 2015
    Assignee: Océ Printing Systems GmbH & CO. KG
    Inventor: Stefan Buschmann
  • Publication number: 20150109367
    Abstract: A print head priming system comprises a vent closure section to close a vent, where the vent is to compensate backpressure in a print head. An inlet to receive pressurized gas from a source of pressurised gas is to provide the pressurized gas to the print head. A pressure relief valve is to open in response to pressure in the print head reaching or exceeding a predetermined value by the provision of gas to the print head by the source of pressurised gas.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Francesc Ros Cerro, Macia Sole Pons, David Ramirez Muela, Li Qian
  • Patent number: 9004630
    Abstract: There is provided an inkjet printing apparatus which can perform stable ejection also in successive printing at high speed even in a case of performing printing in use of a print head provided with an ejection opening surface having hydrophilic properties. The inkjet printing apparatus comprises an inkjet print head wherein the control unit controls the print head such that, in a case where the ejection number of the ink ejected from the print head after removing the ink on the ejection opening surface by the ink removal unit is equal to or more than a threshold, a drive energy amount that is supplied for the preliminary ejection operation is larger than a drive energy amount that is supplied for the preliminary ejection operation in a case where the ejection number is less than the threshold.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshikazu Nagatsuka, Shuichi Murakami, Keiji Tomizawa, Atsushi Omura, Etsuko Sawada, Hiroaki Mihara, Yohei Hamade
  • Patent number: 8998361
    Abstract: A recording apparatus is provided, including a recording head, a transport mechanism which has an adjusting mechanism configured to adjust a spacing distance between recording media upstream from the recording head, a discharge control unit configured to control the recording head so that a liquid is discharged when discharge ports face the recording medium and configured to control the recording head so that at least one of discharge flushing and non-discharge flushing is performed when the discharge ports are positioned between the two recording media, and a measuring mechanism which is arranged upstream from the recording head to measure the spacing distance between the recording media. The adjusting mechanism is configured to adjust the next spacing distance between the recording media depending on the spacing distance between the recording media measured by the measuring mechanism.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: April 7, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tomoyasu Yabuki
  • Patent number: 8998378
    Abstract: In an ink jet printing method, a recording medium is moved relative to a print head having a plurality of nozzles, and ink droplets are ejected from the nozzles onto the recording medium in a single pass in accordance with print data supplied to the print head. Spit pattern data is included in the print data A location of an expected ink dot ejected according to the spit pattern data is scanned, providing a scanned image, and such ink dot is searched for in the scanned image in order to determine an actual presence of the ink dot.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: April 7, 2015
    Assignee: OCE-Technologies B.V.
    Inventors: Sebastian P. R. C. De Smet, Jos De Jong
  • Patent number: 8985740
    Abstract: An inkjet printing apparatus includes a purge unit having a sheet member that purges ink deposited on an orifice face of a print head and a winding unit that winds the sheet member. By using the number of ink ejections executed between a first purge operation and a second purge operation, the amount of winding of the sheet member is controlled after the second purge operation is completed.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Ibe, Masaya Uetsuki, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Hiroaki Komatsu
  • Patent number: 8985736
    Abstract: An image forming apparatus includes an ink jet head, having a pressure chamber, a flow path and a nozzle, which ejects ink in the pressure chamber through the nozzle, a first tank connected to the flow path, a supply unit which supplies ink in the first tank to the pressure chamber through the flow path, a second tank connected to the flow path, a discharge unit which moves ink in the pressure chamber to the second tank through the flow path, and a control section which activates the supply unit and the discharge unit so that ink in the pressure chamber is discharged to the second tank by the discharge unit, ink in the first tank is charged to the pressure chamber by the supply unit and the liquid surface of ink supplied to the pressure chamber is projected from the nozzle.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 24, 2015
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Hideyuki Akaba, Hideaki Nishida
  • Publication number: 20150077466
    Abstract: A liquid droplet ejection apparatus including a head 1 in which a plurality of ink chambers 11 are aligned in one or both of an X direction and a Y direction, liquid droplets are ejected from nozzles 12, and printing is carried out in a print region of a recording medium based on print data, wherein the ink contains a dispersion medium and solid particles having higher specific gravity than that of the dispersion medium, and the liquid droplet ejection apparatus includes a flushing device that performs a flushing operation when the head 1 is present in a non-print region in such a manner that an amount of liquid droplets ejected from the nozzle 11b placed at an end portion in an alignment direction becomes larger than an amount of liquid droplets ejected from the nozzle 11a placed in a central portion in the alignment direction.
    Type: Application
    Filed: June 18, 2014
    Publication date: March 19, 2015
    Inventor: Ryohei KOBAYASHI
  • Patent number: 8955945
    Abstract: An image forming device includes a drive transfer device that selectively transmits a driving force of a first drive source to one of liquid feed pumps, a suction part of a maintenance recovery device and an air-vent opening part. The air-vent opening part is arranged to have a maximum driving-force transmission path leading to the drive transfer device among the liquid feed pumps, the suction part and the air-vent opening part. The maintenance recovery device, the drive transfer device and the liquid feed pumps are arranged in order in a sheet transport direction. The suction part of the maintenance recovery device and the drive transfer device are arranged on opposite sides of a cap of the maintenance recovery device in the sheet transport direction.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: February 17, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Miwa, Tomohiro Sawai, Isamu Kubo
  • Patent number: 8931870
    Abstract: According to one example there is provided a method of printing an image on a substrate using a printing system having a printhead. The method comprises forming, using ink from the printing system, a spittoon on the substrate, printing the image on the substrate, and whilst printing the image, ejecting ink from a printhead into the formed spittoon during a printhead maintenance operation.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: January 13, 2015
    Assignee: Hewlett-Packard Industrial Printing Ltd.
    Inventors: Liad Weissman, Ran Vilk
  • Patent number: 8926062
    Abstract: Printers and duplexers are described herein. An example duplexer for a printer includes a waste ink roller movable between a concealed region and a receiving region.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: January 6, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Daniel Fredrickson, Russell Yearout
  • Patent number: 8926061
    Abstract: An inkjet printer 1 includes an inkjet head 31 with nozzles for discharging ink, a pressurizer for pressurizing a route for ink supply to the inkjet head 31, a head driver 6 for driving the inkjet head 31, and a controller 8 operable for control the pressurizer to pressurize the route for a prescribed time to have fluxes of ink once spilt out of the nozzles and to render nozzles covered with spilt ink before use of the head driver 6 to drive the inkjet head 31 for discharge operation in a maintenance service to the inkjet head 31.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: January 6, 2015
    Assignee: Riso Kagaku Corporation
    Inventors: Toshihiro Bansyo, Asayo Nishimura, Hiroshi Sugitani
  • Patent number: 8915574
    Abstract: A printing device includes a head that has a plurality of nozzles, a reversing section for reversing a front surface and a back surface that are facing surfaces of a printing medium facing the head, and a control section for causing the head to execute an ejection operation of forming an image forming dot for printing an image designated as a print target and a flushing dot other than the image forming dot on the facing surface by moving either one of the printing medium and the head so as to relatively change the positions of the printing medium and the head and ejecting liquid from each of the nozzles.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: December 23, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Akito Sato
  • Patent number: 8911059
    Abstract: A liquid ejection device may include a liquid ejection head, a conveyor mechanism, a liquid discharging device, and a control device. The control device may be configured to determine a dimension of a recording medium, and determine one or more first ejection nozzles of the liquid discharging device, which correspond to an edge of the recording medium, based on the dimension. The control device may be further configured to control the liquid discharging device to perform a liquid discharging process after the liquid ejection head records an image onto the recording medium, wherein in the liquid discharging process, an amount of liquid discharged from each of the one or more first ejection nozzles is larger than an amount of liquid discharged from each of one or more second ejection nozzles, which correspond to a more inward area of the recording medium than an area corresponding to the one or more first ejection nozzles.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: December 16, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shuichi Tamaki
  • Patent number: 8905517
    Abstract: A method is disclosed. The method includes receiving print job data, rasterizing the print job data to generate image data for each page of the print job data to be printed, calculating a coverage per unit area for two or more color planes of each page of the image data and calculating a flushing mask to flush nozzles of the inkjet print head.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: December 9, 2014
    Assignee: Ricoh Production Print Solutions LLC
    Inventors: Kartheek Chandu, Larry Ernst
  • Patent number: 8888236
    Abstract: An ink jet recording apparatus includes: a carriage which is movable in a forward direction from one end to the other end; a recording head provided in the carriage and having a plurality of nozzle groups from which the ink is discharged; an ink receiver provided at a side of the one end including a flushing position and configured to receive the ink discharged by a flushing operation; and a controller configured to control operations of the carriage and the recording head. In a case that the carriage is moved in the forward direction, the controller executes: an acceleration process for accelerating the carriage; a selecting process for selecting at least one nozzle group for which the flushing operation is performed; a flushing process for performing the flushing operation for the nozzle group selected in the selecting process during the acceleration process; and a recording process for recording the image.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: November 18, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Isao Kobayashi
  • Patent number: 8888220
    Abstract: A printing apparatus comprising: a first transport unit that transports a printing medium; a line head, having a nozzle row in which the plurality of nozzles are arranged, that ejects the liquid from the nozzles onto the printing medium; a second transport unit, disposed at a distance from the first transport unit downstream from the first transport unit, that further transports the printing medium transported by the first transport unit; and a control unit that causes the line head to execute a flushing operation for ejecting the liquid from the nozzles at a predetermined frequency, wherein when causing the line head to execute the flushing operation, the control unit provides a margin, where the liquid does not land, in a region corresponding to a predetermined distance from a leading end of the printing medium that is an end of the printing medium located toward the second transport unit.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: November 18, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Akito Sato
  • Patent number: 8888231
    Abstract: A cleaning method of an ink supply path in a recording apparatus where ink is supplied from an ink cartridge, includes a first cleaning step of cleaning by supplying to the ink supply path a gas-liquid mixture of a cleaning liquid A provided with an ink cleaning action and gas, and a second cleaning step of cleaning by supplying to the ink supply path a cleaning liquid B provided with an air bubble suppressing action after the first cleaning step.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: November 18, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Tetsuya Aoyama, Hitoshi Ohta
  • Patent number: 8882227
    Abstract: A liquid discharge apparatus, comprising: a transportation unit that transports a medium; a head that includes a first nozzle array on which nozzles for discharging a first liquid are arrayed, and a second nozzle array on which nozzles for discharging a second liquid are arrayed; and a controller that controls the transportation unit and the head based on print data, wherein, in a case where the printing of the print data is designated to be performed without forming the printing dots of the first liquid on the medium, the controller causes the head to discharge the second liquid from the second nozzle array to form the printing dots of the second liquid on the medium, and causes the head to discharge the first liquid from the first nozzle array to form the flushing dots of the first liquid on the medium.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: November 11, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Akito Sato, Satoshi Yamazaki, Keiko Yamada, Yuko Yamamoto
  • Patent number: 8882239
    Abstract: In a method for determining a maintenance performance of a maintenance unit of an inkjet printing system, the inkjet system comprises an inkjet print head having an orifice surface, the orifice surface comprising an orifice, which orifice is in fluid communication with an ink chamber. The method comprises operating the maintenance unit to perform a maintenance operation on the orifice surface of the inkjet print head and detecting the presence of a wiper element or amount of ink over the orifice by detecting a pressure wave in the ink chamber and analyzing the detected pressure wave to determine the maintenance performance of the maintenance unit.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: November 11, 2014
    Assignee: Oce-Technologies B.V.
    Inventors: Mark Miedema, Bastiaan J. H. Middelbos
  • Patent number: 8882240
    Abstract: An inkjet printing apparatus and a print head recovery method are provided according to which, in an environment in which dust (e.g., paper dust) is easily attached to the periphery of an ejection port of a print head, the print head is subjected to a recovery operation depending on the level of the attached dust. The inkjet printing apparatus has a cutter unit for cutting a print medium and a recovery unit for performing the recovery operation by wiping the ejection port formation portion at which the ejection port is formed of the print head while sucking the ejection port formation portion. When the passing number showing how many times the cut part of the print medium cut by the cutter passes the printing position is equal to or higher than a threshold value, the recovery means subjects the print head to the recovery operation.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: November 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Susumu Hirosawa, Hidehiko Kanda, Yutaka Kano, Kentarou Muro
  • Patent number: 8864258
    Abstract: A recording head that includes a pressure chamber filled with ink and a piezoelectric element changing pressure inside the pressure chamber, and that ejects ink from the nozzle according to the change in the pressure inside the pressure chamber. A control unit controls the piezoelectric element and performs ejection driving for ejecting the ink from the nozzle or micro-vibration driving for micro-vibrating a liquid surface inside the nozzle to an extent at which the ink is not ejected from the nozzle; and performs a flushing operation of an ejection amount according to a number of times of micro-vibration driving in a driving period, in a preparation period after the driving period has passed.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: October 21, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Masako Fukuda
  • Patent number: 8864285
    Abstract: A system and a method for cleaning a printhead by providing from a first slit a laminar flow of cleaning fluid that flows through a pretensioned brush for brushing the nozzle plate and collecting debris. The cleaning fluid with the debris is drained by a first slit having a first under pressure and next by a second slit that has a second under pressure that is greater than the first under pressure.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: October 21, 2014
    Assignee: Agfa Graphics NV
    Inventor: Luc De Roeck
  • Patent number: 8833903
    Abstract: An inkjet recording apparatus may include a recording unit, an ink receiver, and a control unit. The recording unit records an image on a sheet by causing a recording head including a plurality of nozzle arrays to reciprocate along a surface of the sheet in a direction in which the plurality of nozzle arrays is arranged. The ink receiver receives ink ejected outside the sheet in preliminary ejection from the recording head. Depending on a recording region on the sheet and which of the plurality of nozzle arrays is or are to be used for recording, the control unit determines a reversing position at which the recording head is reversed in direction of the reciprocation such that all of the plurality of nozzle arrays pass over the ink receiver in a single scan included in the reciprocation.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiyoshi Sahara, Yasufumi Ogasawara, Takeaki Nakano