Patents by Inventor Kenji Aono

Kenji Aono 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: 5444473
    Abstract: An ink storage unit used in an ink jet recording apparatus for recording by ejecting ink comprises a plurality of ink storage chambers, a plurality of movable walls and a mechanism for holding each of the movable walls. Each of the ink storage chambers stores ink. Each of the movable walls is provided in the each ink storage chamber respectively so as to seal stored ink against air, and each movable wall can move according to a change of amount of ink in each ink storage chamber. The mechanism for holding the movable walls exerts a force opposed to a force which is exerted on the each movable wall according to the change of amount of ink, on each of the movable walls so as to make the pressure in each ink storage chamber an appropriate negative pressure.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: August 22, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshifumi Hattori, Masashi Kitani, Etsuro Suzuki, Hideo Saikawa, Masami Kojima, Kenji Kawano, Koichi Tanno, Kenji Aono
  • Patent number: 5365262
    Abstract: An ink container for containing ink includes an outer casing; an inner casing, in the outer casing, for containing the ink therein; filler material disposed between the outer casing and the inner casing to isolate the ink from ambient condition change.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: November 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshifumi Hattori, Masashi Kitani, Etsurou Suzuki, Hideo Saikawa, Masami Kojima, Kenji Kawano, Koichi Tanno, Kenji Aono
  • Patent number: 5365260
    Abstract: An ink jet cartridge is composed integrally of a recording head and an ink tank, which are constructed in mutually separable manner, in order to enable repeated use of the recording head by replacement of the ink tank. In an ink supply part in the ink tank, an elastic partition wall is provided with a slit which is normally closed but is opened under a predetermined pressure difference. The slit is so designed as to generate an appropriate negative pressure on the recording head, thereby preventing ink leakage. Also a slit shielding valve member is provided to shield the slit at the abrupt inhaling action of the ink tank at the detaching of the ink tank, in order to prevent air intrusion into the ink tank.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: November 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Kitani, Yoshifumi Hattori, Etsurou Suzuki, Hideo Saikawa, Masami Kojima, Kenji Kawano, Koichi Tanno, Kenji Aono
  • Patent number: 5270739
    Abstract: A liquid container includes a liquid outlet for supplying liquid, a pressure control device disposed in the container and adjacent to the outlet The pressure control device has a value function for permitting liquid supply through the outlet within a predetermined pressure range.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: December 14, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Kitani, Yoshifumi Hattori, Etsurou Suzuki, Hideo Saikawa, Masami Kojima, Kenji Kawano, Koichi Tanno, Kenji Aono
  • Patent number: 5131949
    Abstract: An ink that includes a recording agent and a liquid medium capable of dissolving or dispersing the recording agent. The ink contains a compound represented by the following Formula (I):R.sub.1 --CONH--R.sub.2 (I)wherein R.sub.1 represents an alkyl group or aryl group unsubstituted or substituted with a group selected from a hydroxyl group, a carboxyl group, a sulfone group, an amino group and an acetylamino group; and R.sub.2 represents a hydrogen atom, an amide group, an aminoalkyl group, an aliphatic carboxylic acid residual group, or an aryl group unsubstituted or substituted with a group selected from a hydroxyl group, a carboxyl group, a sulfone group, an amino group and an acetylamino group; provided that R.sub.1 represents the unsubstituted or substituted aryl group when R.sub.2 is a hydrogen atom. The ink is suitably used in ink-jet recording.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: July 21, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Tochihara, Makoto Aoki, Kumiko Mafune, Akira Nagashima, Kenji Aono, Osamu Nishiwaki
  • Patent number: 5132700
    Abstract: An ink-jet recording process and apparatus employing ink that includes a recording agent and a liquid medium capable of dissolving or dispersing the recording agent, wherein said ink contains both a compound represented by the following Formula (I) and a compound represented by the following Formula (II): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent an alkyl group or a hydroxyalkyl group, and any one of them may represent a hydrogen atom; X.sup.- represents an inorganic acid ion; R.sub.4 and R.sub.5 each represent a group selected from a hydrogen atom, an alkyl group and a hydroxyalkyl group; and R.sub.6 represents a group selected from a carboxyl group, a hydroxyl group, a sulfone group, an alkyl group and a hydrogen atom. The ink is suitably used in the ink-jet recording.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: July 21, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Tochihara, Makoto Aoki, Kumiko Mafune, Osamu Nishiwaki, Kenji Aono, Akira Nagashima
  • Patent number: 5080716
    Abstract: An ink comprises a recording agent and a liquid medium capable of dissolving or dispersing the recording agent, wherein said ink contains a compound represented by the following Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represent a group selected from a hydrogen atom, an alkyl group, a hydroxyl group and a carboxyl group; and R.sub.3 represents a monohydric hydroxyalkyl group. The ink is suitably used for ink-jet recording.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: January 14, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Aoki, Kumiko Mafune, Shinichi Tochihara, Osamu Nishiwaki, Kenji Aono, Akira Nagashima
  • Patent number: 5078790
    Abstract: An ink comprises a recording agent and a liquid medium capable of dissolving or dispersing the recording agent, wherein said ink contains both a compound represented by the following Formula (I) and a compound represented by the following Formula (II): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent an alkyl group or a hydroxyalkyl group, and any one of them may represent a hydrogen atom; X.sup.- represents an inorganic acid ion; R.sub.4 and R.sub.5 each represent a group selected from a hydrogen atom, an alkyl group and a hydroxyalkyl group; and R.sub.6 represents a group selected from a carboxyl group, a hydroxyl group, a sulfone group, an alkyl group and a hydrogen atom. The ink is suitably used in the ink-jet recording.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: January 7, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Tochihara, Makoto Aoki, Kumiko Mafune, Osamu Nishiwaki, Kenji Aono, Akira Nagashima