Patents by Inventor Kenji Yabe

Kenji Yabe 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).

  • Patent number: 6988786
    Abstract: An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: January 24, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mineo Kaneko, Ken Tsuchii, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe
  • Patent number: 6984025
    Abstract: An ink jet head includes a substrate provided with heat generating members for generating a bubble in ink on a surface of the substrate, a plurality of discharge ports for discharging the ink, the ports opposed to the surface of the substrate, and a plurality of ink flow passages communicating with the plurality of discharge ports to feed the ink. A plurality of the heat generating members is provided in each of the ink flow passages, and the discharge port is arranged on an extension line extending from a center of a pressure generating area composed of the plurality of heat generating members toward the surface of the substrate in a normal direction. Moreover, a distance dhc between centers of each of two heat generating members arranged most apart from each other among the plurality of heat generating members is set to be larger than a diameter do of an aperture of the discharge port.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: January 10, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mineo Kaneko, Ken Tsuchii, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe
  • Patent number: 6976748
    Abstract: Since the large amount nozzle arrays are disposed at first columns and the small amount nozzle arrays are disposed at second columns on both sides of the shifting directions along the main scan direction, the deflection of the ink droplet caused by the first air flows is totally reduced.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: December 20, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Yabe, Mineo Kaneko, Ken Tsuchii, Nobuyuki Hirayama, Masaki Oikawa
  • Patent number: 6830317
    Abstract: In an ink jet recording head from which a small ink droplet and a large ink droplet can be discharged, a common liquid chamber is connected to discharge ports via ink flow paths and pressure chambers, and ink droplets are discharged from the discharge ports by utilizing thermal energy of heaters. Widths of the ink flow paths are narrower than widths of the pressure chambers so that the ink flow paths act as restriction portions. If it is assumed that a sectional area of the small liquid droplet ink flow path is SS, a sectional area of the small liquid droplet pressure chamber is SRS, a sectional area of the large liquid droplet ink flow path is SL and a sectional area of the large liquid droplet pressure chamber is SRL, a relationship SS/SRS<SL/SRL is established.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: December 14, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ken Tsuchii, Mineo Kaneko, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe, Keiji Tomizawa
  • Patent number: 6799831
    Abstract: The present invention provides a liquid discharge recording head comprising a substrate on which an energy generating element for generating liquid discharging energy is provided, and an orifice plate which is laminated with the substrate and in which a discharge port corresponding to the energy generating element is provided, and wherein a liquid droplet is discharged in a direction substantially perpendicular to surfaces of the substrate and the orifice plate, and further wherein a flow path is formed between the substrate and the orifice plate, a groove encircling the flow path is formed in the orifice plate, and edge portions of the orifice plate contacted with the groove are formed as saw-shaped portions having a number of minute indentations.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: October 5, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Inamoto, Haruhiko Terai, Hiroyuki Yamamoto, Yoshiaki Kurihara, Kenji Yabe
  • Publication number: 20040021731
    Abstract: Since the large amount nozzle arrays are disposed at first columns and the small amount nozzle arrays are disposed at second columns on both sides of the shifting directions along the main scan direction, the deflection of the ink droplet caused by the first air flows is totally reduced.
    Type: Application
    Filed: April 21, 2003
    Publication date: February 5, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Kenji Yabe, Mineo Kaneko, Ken Tsuchii, Nobuyuki Hirayama, Masaki Oikawa
  • Patent number: 6676241
    Abstract: An ink jet head comprises a substrate bearing a liquid discharge pressure generating element for generating energy for discharging liquid from a discharge port, a flow path forming member adjoined to the substrate and forming a flow path communicating with the discharge port through a position on the liquid discharge pressure generating element, and an adhesion layer formed in at least a part between the substrate and the flow path forming member and having an adhesion force with respect to the substrate and the flow path forming member larger than an adhesion force between the flow path forming member and the base, wherein the adhesion layer is formed, in a portion where the stress in the flow path forming member is concentrated in a direction of peeling from the substrate, in an area wider than the adjoining area between the flow path forming member and said adhesion layer.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: January 13, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenji Yabe
  • Publication number: 20040004648
    Abstract: An ink jet head includes a substrate provided with heat generating members for generating a bubble in ink on a surface of the substrate, a plurality of discharge ports for discharging the ink, the ports opposed to the surface of the substrate, and a plurality of ink flow passages communicating with the plurality of discharge ports to feed the ink. A plurality of the heat generating members is provided in each of the ink flow passages, and the discharge port is arranged on an extension line extending from a center of a pressure generating area composed of the plurality of heat generating members toward the surface of the substrate in a normal direction. Moreover, a distance dhc between centers of each of two heat generating members arranged most apart from each other among the plurality of heat generating members is set to be larger than a diameter do of an aperture of the discharge port.
    Type: Application
    Filed: April 21, 2003
    Publication date: January 8, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Mineo Kaneko, Ken Tsuchii, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe
  • Publication number: 20030222941
    Abstract: An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.
    Type: Application
    Filed: April 18, 2003
    Publication date: December 4, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Mineo Kaneko, Ken Tsuchii, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe
  • Patent number: 6652079
    Abstract: An ink jet recording head that is capable of avoiding damages due to cavitation of an electrothermal converting element and thus extending its life is provided. The ink jet recording head comprises a plurality of ink discharge ports for discharging ink; a plurality of electrothermal converting elements provided to be associated with each of the ink discharge ports, respectively, for bubbling and discharging the ink; a plurality of pressure chambers for containing the electrothermal converting elements and providing spaces for heating and bubbling the ink; a common liquid chamber for supplying ink to the plurality of pressure chambers; and a plurality of ink flow paths for communicating the pressure chambers with the common liquid chamber. The ink flow paths are arranged such that central lines in a direction of ink supply to the pressure chambers are positioned offset from central lines of the electrothermal converting elements in the same direction.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: November 25, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ken Tsuchii, Mineo Kaneko, Masaki Oikawa, Ryoji Inoue, Kenji Yabe
  • Publication number: 20030214552
    Abstract: An ink jet head according to the present invention comprises multiple discharge ports for discharging ink, multiple ink flow paths for communicating with the discharge ports, and heat generating elements for generating bubble in ink filling the ink flow paths. Two heat generating elements are arranged in each ink flow path, and the discharge ports are arranged along a line that is extended, from the center of a pressure generation region formed by the two heat generating elements, in the normal direction relative to the surface of the substrate. The pitch for the arrangement of the heat generating elements is equal to or greater than 600 dpi, and the interval dhn between a partition wall defining the ink flow path and the heat generating element adjacent to the partition wall is equal to or smaller than 4 &mgr;m.
    Type: Application
    Filed: April 23, 2003
    Publication date: November 20, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Mineo Kaneko, Ken Tsuchii, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe
  • Publication number: 20030214551
    Abstract: An ink jet head is provided with a plurality of nozzle arrays formed by many numbers of ink nozzles for discharging large-amount ink droplets and small-amount ink droplets. Although the ink jet head generates heat more on the middle portion thereof, it is cooled by discharges of ink droplets. The degree of cooling is greater by the large-amount ink droplets to be discharged. Thus, on the first column in the main scan direction, the small-amount nozzle array is positioned, and on the second column, the large-amount nozzle array is positioned. In this way, it is made possible to balance the temperature distributions in the main scan direction. As a result, color images can be formed in high quality.
    Type: Application
    Filed: April 21, 2003
    Publication date: November 20, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventor: Kenji Yabe
  • Publication number: 20030197760
    Abstract: In an ink jet recording head according to the present invention in which a small ink droplet and a large ink droplet can be discharged, a common liquid chamber is connected to discharge ports via ink flow paths and pressure chambers, and ink droplets are discharged from the discharge ports by utilizing thermal energy of heaters. Widths of the ink flow paths are narrower than widths of the pressure chambers so that the ink flow paths act as restriction portions. When it is assumed that a sectional area of the small liquid droplet ink flow path is SS, a sectional area of the small liquid droplet pressure chamber is SRS, a sectional area of the large liquid droplet ink flow path is SL and a sectional area of the large liquid droplet pressure chamber is SRL, a relationship SS/SRS<SL/SRL is established. According to the present invention, with this arrangement, even in the nozzle for discharging the small ink droplet, loss is reduced and energy efficiency can be enhanced.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 23, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Ken Tsuchii, Mineo Kaneko, Keiichiro Tsukuda, Masaki Oikawa, Kenji Yabe, Keiji Tomizawa
  • Patent number: 6575560
    Abstract: A liquid discharge recording head, comprising a plurality of orifice strings each having a plurality of orifices arranged correspondingly to respective recording liquids for discharging the recording liquids of a plurality of colors, a plurality of liquid flow paths and electrical heat converting elements corresponding to the plurality of orifices, and a plurality of liquid supplying apertures arranged along the orifice strings for supplying the recording liquids of the plurality of colors to the plurality of liquid flow paths, wherein the orifice strings corresponding to the recording liquids of the plurality of colors are symmetrically arranged about the head scanning direction regarding the same color of the recording liquids and the head has a plurality of chambers having communication with the liquid flow paths in the opposite side of the orifice strings with the liquid supplying apertures therebetween.
    Type: Grant
    Filed: July 6, 2001
    Date of Patent: June 10, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mineo Kaneko, Kenji Yabe
  • Publication number: 20030048328
    Abstract: The present invention provides a liquid discharge recording head comprising a substrate on which an energy generating element for generating liquid discharging energy is provided, and an orifice plate which is laminated with the substrate and in which a discharge port corresponding to the energy generating element is provided, and wherein a liquid droplet is discharged in a direction substantially perpendicular to surfaces of the substrate and the orifice plate, and further wherein a flow path is formed between the substrate and the orifice plate, a groove encircling the flow path is formed in the orifice plate, and edge portions of the orifice plate contacted with the groove are formed as saw-shaped portions having a number of minute indentations.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 13, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Inamoto, Haruhiko Terai, Hiroyuki Yamamoto, Yoshiaki Kurihara, Kenji Yabe
  • Patent number: 6527367
    Abstract: An ink jet recording head comprises a plurality of pairs arranged correspondingly on one base plate, having at least a plurality of heat generating resistive elements for use of ink discharges arranged on the base plate for generating thermal energy for discharging ink as ink droplets; a plurality of ink discharge ports each arranged in a position facing each of the heat generating resistive elements; a plurality of ink flow paths each communicated with each of the ink discharge ports; and elongated ink supply ports arranged on the base plate along the lines of the heat generating elements for use of ink discharges, being communicated with the plurality of ink flow paths.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: March 4, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenji Yabe
  • Publication number: 20020122101
    Abstract: An ink jet head comprises a substrate bearing a liquid discharge pressure generating element for generating energy for discharging liquid from a discharge port, a flow path forming member adjoined to the substrate and forming a flow path communicating with the discharge port through a position on the liquid discharge pressure generating element, and an adhesion layer formed in at least a part between the substrate and the flow path forming member and having an adhesion force with respect to the substrate and the flow path forming member larger than an adhesion force between the flow path forming member and the base, wherein the adhesion layer is formed, in a portion where the stress in the flow path forming member is concentrated in a direction of peeling from the substrate, in an area wider than the adjoining area between the flow path forming member and said adhesion layer.
    Type: Application
    Filed: February 20, 2002
    Publication date: September 5, 2002
    Inventor: Kenji Yabe
  • Publication number: 20020063756
    Abstract: An ink jet recording head that is capable of avoiding damages due to cavitation of an electrothermal converting element and thus extending its life is provided. The ink jet recording head comprises a plurality of ink discharge ports for discharging ink; a plurality of electrothermal converting elements provided to be associated with each of the ink discharge ports, respectively, for bubbling and discharging the ink; a plurality of pressure chambers for containing the electrothermal converting elements and providing spaces for heating and bubbling the ink; a common liquid chamber for supplying ink to the plurality of pressure chambers; and a plurality of ink flow paths for communicating the pressure chambers with the common liquid chamber. The ink flow paths are arranged such that central lines in a direction of ink supply to the pressure chambers are positioned offset from central lines of the electrothermal converting elements in the same direction.
    Type: Application
    Filed: September 6, 2001
    Publication date: May 30, 2002
    Inventors: Ken Tsuchii, Mineo Kaneko, Masaki Oikawa, Ryoji Inoue, Kenji Yabe
  • Publication number: 20020041307
    Abstract: An ink jet recording head comprises a plurality of pairs arranged correspondingly on one base plate, having at least a plurality of heat generating resistive elements for use of ink discharges arranged on the base plate for generating thermal energy for discharging ink as ink droplets; a plurality of ink discharge ports each arranged in a position facing each of the heat generating resistive elements; a plurality of ink flow paths each communicated with each of the ink discharge ports; and elongated ink supply ports arranged on the base plate along the lines of the heat generating elements for use of ink discharges, being communicated with the plurality of ink flow paths.
    Type: Application
    Filed: September 4, 2001
    Publication date: April 11, 2002
    Inventor: Kenji Yabe
  • Publication number: 20020021326
    Abstract: A liquid discharge recording head, comprising a plurality of orifice strings each having a plurality of orifices arranged correspondingly to respective recording liquids for discharging the recording liquids of a plurality of colors, a plurality of liquid flow paths and electrical heat converting elements corresponding to the plurality of orifices, and a plurality of liquid supplying apertures arranged along the orifice strings for supplying the recording liquids of the plurality of colors to the plurality of liquid flow paths, wherein the orifice strings corresponding to the recording liquids of the plurality of colors are symmetrically arranged about the head scanning direction regarding the same color of the recording liquids and the head has a plurality of chambers having communication with the liquid flow paths in the opposite side of the orifice strings with the liquid supplying apertures therebetween.
    Type: Application
    Filed: July 6, 2001
    Publication date: February 21, 2002
    Inventors: Mineo Kaneko, Kenji Yabe