Patents by Inventor Toshimitsu Danzuka

Toshimitsu Danzuka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130257977
    Abstract: A printing apparatus includes a print head, a scanning unit, a sheet-form member, a winding device, and a determining unit. The print head includes an orifice face having an ejection orifice to eject a liquid. The scanning unit performs scanning while reciprocating the print head. The sheet-form member performs a wiping operation of the orifice face of the print head, wherein the wiping operation includes a first wiping operation and a second wiping operation. The winding device performs a winding operation of the sheet-form member. The determining unit determines a length of the sheet-form member that is to be wound by the winding device in accordance with a length of time between the first wiping operation performed by the sheet-form member and the second wiping operation performed by the sheet-form member that follows the first wiping operation.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Asako Tomida, Masaya Uetsuki, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Hiroaki Komatsu
  • Publication number: 20130257931
    Abstract: An ink jet recording apparatus includes a recording head, a carriage, a wiping unit, and a control unit. The recording head includes a discharging port surface provided with a first discharging port row group having at least one discharge port row formed by arraying a plurality of discharging ports in a predetermined direction and a second discharging port row group having at least one discharge port row formed by arraying a plurality of discharging ports in a predetermined direction. The carriage causes the recording head to scan reciprocally in a direction intersecting the predetermined direction. The wiping unit includes a sheet member for wiping the discharge port surface and a winding device to wind the sheet member. The control unit controls the winding device so that the first discharge port row group and the second discharge port row group are wiped with different areas of the sheet member.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroaki Komatsu, Masaya Uetsuki, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Asako Tomida
  • Publication number: 20130235107
    Abstract: A color measuring method includes: recording color patterns on a sheet by an inkjet head; measuring colors of the color patterns formed on the sheet; and recovering the inkjet head, wherein the recovering is prohibited within a period after the recording and before the measuring.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 12, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsuyoshi Ibe, Masaya Uetsuki, Toshimitsu Danzuka, Taku Yokozawa, Masataka Kato, Asako Tomida, Hiroaki Komatsu, Shin Genta
  • Patent number: 8469484
    Abstract: In an inkjet apparatus capable of ejecting an ink and a treatment liquid for insolubilizing or coagulating a color material in the ink, a replacement timing for a component of the apparatus is judged based on both the consumption amounts of the ink and treatment liquid measured when the two are consumed together and the consumption amount of the ink measured when the ink is consumed alone. Thus, the component is replaced at an earlier timing when the influence of fixed adhesion is great due to frequent ejection of both of the ink and treatment liquid, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, when the fixed adhesion slowly develops because of less-frequent ejection of both of the ink and treatment liquid, the component is replaced at a later timing and thus can be used until reaching its lifetime.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: June 25, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jumpei Jogo, Yutaka Kawamata, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Hiroaki Komatsu
  • Publication number: 20130027489
    Abstract: A printing apparatus includes a printing unit configured to apply ink to a recording medium while reciprocating a print head with respect to the recording medium and a drying unit configured to apply energy for accelerating dryness to the recording medium to which the ink is applied by the print head. The drying unit applies a larger energy at edges of a range within which the printing unit moves on the recording medium than at a middle of the range.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazuo Suzuki, Masaya Uetsuki, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Asako Tomida, Hiroaki Komatsu
  • Publication number: 20120188304
    Abstract: When performing at least one of preliminary ejection or a suction unit as a countermeasure against adhering ink that accumulates in the portion where preliminary ejection is performed, the preliminary ejection amount and suction speed of the suction unit are optimized. An inkjet print apparatus that prints by using a printing head for ejecting ink, comprising: an ejecting unit; a sucking unit; a measuring unit that measures an elapsed time after the sucking unit is performed; and a control unit that control ejection by the ejecting unit or sucking by the sucking unit according to the elapsed time measured in the measuring unit; wherein as the elapsed time becomes longer, the amount of ink that is ejected to the ink receiving unit in the ejecting unit is increased or a suction speed at which the ink is sucked in the sucking unit is increased.
    Type: Application
    Filed: January 26, 2012
    Publication date: July 26, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tsuyoshi Ibe, Masaya Uetsuki, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Hiroaki Komatsu
  • Publication number: 20120176438
    Abstract: An inkjet recording apparatus that suppresses temperature rising of a recording head to decrease standby time when the recording head is high in temperature, thereby reducing a drop in recording speed and degradation in image quality. The inkjet recording apparatus includes a recording head configured to have a discharge port surface in which a discharge port for discharging ink is formed, a temperature sensor configured to detect temperature of the recording head, and a cleaning unit configured to make contact with the recording head to clean the discharge port surface. The inkjet recording apparatus controls whether to make the cleaning unit contact the discharge port surface based on the recording head temperature detected by the temperature sensor.
    Type: Application
    Filed: December 30, 2011
    Publication date: July 12, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazuo Suzuki, Masaya Uetsuki, Toshimitsu Danzuka, Masataka Kato, Tsuyoshi Ibe, Asako Tomida, Hiroaki Komatsu
  • Patent number: 8132898
    Abstract: A recording head includes ejection ports that eject ink, a first liquid chamber for supplying ink to the ejection ports, a second liquid chamber for supplying ink to the first liquid chamber, a gas reservoir disposed in the upper part of the first liquid chamber and collecting gas, a first outlet through which fluid is discharged out of the gas reservoir, and a pump chamber into which fluid is moved through the first outlet out of the first liquid chamber by producing a pressure difference from the first liquid chamber.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: March 13, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideo Fukazawa, Toshiro Sugiyama, Shigeru Watanabe, Kouhei Tokuda, Tsuyoshi Mikoshiba, Takeshi Kouda, Masaya Uetsuki, Toshimitsu Danzuka, Hiroaki Shirakawa, Masataka Kato
  • Publication number: 20120026230
    Abstract: This invention prevents a possible color mixing, that may occur more than a predetermined time after the wiping operation, by executing a pre-printing cleaning ejection while at the same time minimizing the amount of waste ink produced by the cleaning ejection. To this end, if a color mixing is determined as being likely to occur an elapsed time after the previous wiping operation, the pre-printing cleaning ejection uses a second ink volume U, which represents both the color mixing elimination ink volume and the ejection failure elimination ink volume. If it is decided that there is no likelihood of the color mixing occurring the elapsed time after the wiping operation, the pre-printing cleaning ejection uses the first ink volume D which represents only the ejection failure elimination ink volume.
    Type: Application
    Filed: July 22, 2011
    Publication date: February 2, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Toshimitsu Danzuka, Kazuo Suzuki, Yutaka Kawamata, Masataka Kato, Asako Tomida, Jumpei Jogo, Hiroaki Komatsu
  • Publication number: 20110310159
    Abstract: In an inkjet apparatus using an inkjet head ejecting multiple types of inks different in viscosity after evaporation of solvent, a replacement timing for a component is judged by using a consumption amount of each type of ink and a generation rate in amount of ink droplets. Accordingly, in the case of using a large amount of ink strongly susceptible to fixed adhesion and increase in viscosity, the component is replaced at an earlier timing, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, in the case of using a large amount of ink less susceptible to fixed adhesion and increase in viscosity, the component is replaced at a later timing and thus can be used until reaching its lifetime.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 22, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazuo Suzuki, Yutaka Kawamata, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Jumpei Jogo, Hiroaki Komatsu
  • Publication number: 20110310160
    Abstract: In an inkjet apparatus capable of ejecting an ink and a treatment liquid for insolubilizing or coagulating a color material in the ink, a replacement timing for a component of the apparatus is judged based on both the consumption amounts of the ink and treatment liquid measured when the two are consumed together and the consumption amount of the ink measured when the ink is consumed alone. Thus, the component is replaced at an earlier timing when the influence of fixed adhesion is great due to frequent ejection of both of the ink and treatment liquid, which prevents fixed adhesion from influencing the print performance and the printing apparatus main body. By contrast, when the fixed adhesion slowly develops because of less-frequent ejection of both of the ink and treatment liquid, the component is replaced at a later timing and thus can be used until reaching its lifetime.
    Type: Application
    Filed: June 16, 2011
    Publication date: December 22, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jumpei Jogo, Yutaka Kawamata, Kazuo Suzuki, Toshimitsu Danzuka, Masataka Kato, Asako Tomida, Hiroaki Komatsu
  • Publication number: 20100231641
    Abstract: A simple, low-cost liquid ejection apparatus is provided which can prevent a reverse flow of ink from within the cap into the print head, which would otherwise occur when the interior of the cap is returned to an atmospheric pressure. For this purpose, the ink is sucked out of the nozzle ports of the print head by the recovery unit with the atmospheric vent valve of the subtank open.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 16, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Toshimitsu Danzuka
  • Publication number: 20090315959
    Abstract: A recording head includes ejection ports that eject ink, a first liquid chamber for supplying ink to the ejection ports, a second liquid chamber for supplying ink to the first liquid chamber, a gas reservoir disposed in the upper part of the first liquid chamber and collecting gas, a first outlet through which fluid is discharged out of the gas reservoir, and a pump chamber into which fluid is moved through the first outlet out of the first liquid chamber by producing a pressure difference from the first liquid chamber.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 24, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideo Fukazawa, Toshiro Sugiyama, Shigeru Watanabe, Kouhei Tokuda, Tsuyoshi Mikoshiba, Takeshi Kouda, Masaya Uetsuki, Toshimitsu Danzuka, Hiroaki Shirakawa, Masataka Kato
  • Patent number: 7213903
    Abstract: A capping unit for use with a liquid discharge head. The capping unit includes a cap for covering a discharge surface of the liquid discharge head. The cap includes air-communication openings provided at corners of the cap, and a suction opening. The air-communication openings connect a space in the cap with the atmosphere. A high negative pressure pump provides pressure to the space via the suction opening. The cap minimizes liquid spatter on the discharge surface after a suction process.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: May 8, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshimitsu Danzuka
  • Patent number: 7033006
    Abstract: A stable image may not be obtained due to condensation of an ink left in a subtank. According to the present invention, a stable image is always obtained by changing a method for supplying an ink from a main tank to the subtank in accordance with an elapsed time from the end of previous printing.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: April 25, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Ebisawa, Toshimitsu Danzuka, Yoshito Mizoguchi
  • Patent number: 6929341
    Abstract: In the ink jet recording apparatus using an on-demand supply system, an image natural and stable in color tone is output. For this purpose, when a capacity of a sub-tank is represented by A, an amount of residual ink remaining after the ink has been discharged is represented by “a”, a ratio by weight of a volatile component in a composition of ink used is represented by B and a ratio of a colorant concentration of ink at saturated state made by repeating ink supply and ink discharge, to an initial colorant concentration of the ink is represented by R, they are satisfying an equation of A/(A?a×B)=R?1.20.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: August 16, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshito Mizoguchi, Toshimitsu Danzuka
  • Publication number: 20050024422
    Abstract: A capping unit for use with a liquid discharge head. The capping unit includes a cap for covering a discharge surface of the liquid discharge head. The cap includes air-communication openings provided at corners of the cap, and a suction opening. The air-communication openings connect a space in the cap with the atmosphere. A high negative pressure pump provides pressure to the space via the suction opening. The cap minimizes liquid spatter on the discharge surface after a suction process.
    Type: Application
    Filed: July 28, 2004
    Publication date: February 3, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventor: Toshimitsu Danzuka
  • Publication number: 20040145635
    Abstract: A stable image may not be obtained due to condensation of an ink left in a subtank. According to the present invention, a stable image is always obtained by changing a method for supplying an ink from a main tank to the subtank in accordance with an elapsed time from the end of previous printing.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 29, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Isao Ebisawa, Toshimitsu Danzuka, Yoshito Mizoguchi
  • Patent number: 6698856
    Abstract: The number of printing elements that perform printing with a plurality of types of printing agents is determined in accordance with a maximum multiple printing count with which dots of each one of the plurality of types of printing agents are printed in an overlaying manner at substantially one position on a printing medium.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 2, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshimitsu Danzuka
  • Publication number: 20040021713
    Abstract: In the ink jet recording apparatus using an on-demand supply system, an image natural and stable in color tone is output. For this purpose, when a capacity of a sub-tank is represented by A, an amount of residual ink remaining after the ink has been discharged is represented by “a”, a ratio by weight of a volatile component in a composition of ink used is represented by B and a ratio of a colorant concentration of ink at saturated state made by repeating ink supply and ink discharge, to an initial colorant concentration of the ink is represented by R, they are satisfying an equation of A/(A−a×B)=R≦1.20.
    Type: Application
    Filed: August 4, 2003
    Publication date: February 5, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Yoshito Mizoguchi, Toshimitsu Danzuka