Patents by Inventor Keiji Hamamoto

Keiji Hamamoto 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: 8695857
    Abstract: An object is to provide a cap that can be flexibly designed, such as a cap that can be prevented or reduced from being increased in volume when the lid member has been attached to the cap body, while at the same time providing a capability to increase the distance between the lid member and the cap body when the elastic member has been restored, as well as providing a container equipped with the cap.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: April 15, 2014
    Assignee: Taisei Kako Co., Ltd.
    Inventors: Keiji Hamamoto, Hideo Nishikura
  • Patent number: 8394884
    Abstract: A coating material includes a first aqueous dispersion (A) and a second aqueous dispersion (B) wherein a dispersoid of the first aqueous dispersion (A) has an average particle diameter of 1 to 20 ?m and a dispersoid of the second aqueous dispersion (B) has an average particle diameter 1/100 to ? of that of the dispersoid of the first aqueous dispersion (A), and the mass ratio (the aqueous dispersion (A)/the aqueous dispersion (B)) of the dispersoid of the first aqueous dispersion (A) to the dispersoid of the second aqueous dispersion (B) is 2/1 to 100/1. Also provided is a container, which is coated with the coating material and has excellent properties.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: March 12, 2013
    Assignees: Taisei Kako Co., Ltd., Shionogi & Co., Ltd.
    Inventors: Yuichi Kotori, Juichirou Kawabata, Naoki Fujisawa, Keiji Hamamoto, Takahiro Yamaguchi, Takashi Kashimoto, Shinji Hiramoto
  • Patent number: 8118183
    Abstract: A particularly small eyedropper or the like is provided, which has a construction such that, when a body thereof is squeezed, an introduction hole thereof can be easily closed to compress air in a space between an inner layer and an outer layer thereof even in the absence of a check valve in the introduction hole, and defectiveness of the introduction hole can be easily checked. To this end, a test hole (19) communicating with an introduction hole (17) via a space between an outer layer bottle. (1) and an inner layer bag (16) is provided in an outer layer mouth portion (4). The test hole (19) is closed by the inner layer bag (16) and an inside plug (21) fitted in the mouth portion (4). Further, the introduction hole (17) is provided in a middle portion of a body which is pressed by a finger when the bottle is squeezed. The introduction hole (17) is closed by the finger.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: February 21, 2012
    Assignees: Taisei Kako Co., Ltd., Nihon Tenganyaku Kankyusho Co., Ltd.
    Inventors: Kazuya Iwahashi, Hirokazu Mihashi, Keiji Hamamoto, Masaru Otsuka, Yorishisa Uetake, Kenji Matsuura
  • Publication number: 20110303668
    Abstract: An object is to provide a cap that can be flexibly designed, such as a cap that can be prevented or reduced from being increased in volume when the lid member has been attached to the cap body, while at the same time providing a capability to increase the distance between the lid member and the cap body when the elastic member has been restored, as well as providing a container equipped with the cap.
    Type: Application
    Filed: February 26, 2010
    Publication date: December 15, 2011
    Applicant: TAISEI KAKO CO., LTD.
    Inventors: Keiji Hamamoto, Hideo Nishikura
  • Publication number: 20110097525
    Abstract: A coating material includes a first aqueous dispersion (A) and a second aqueous dispersion (B) wherein a dispersoid of the first aqueous dispersion (A) has an average particle diameter of 1 to 20 ?m and a dispersoid of the second aqueous dispersion (B) has an average particle diameter 1/100 to 1/5 of that of the dispersoid of the first aqueous dispersion (A), and the mass ratio (the aqueous dispersion (A)/the aqueous dispersion (B)) of the dispersoid of the first aqueous dispersion (A) to the dispersoid of the second aqueous dispersion (B) is 2/1 to 100/1. Also provided is a container, which is coated with the coating material and has excellent properties.
    Type: Application
    Filed: June 26, 2009
    Publication date: April 28, 2011
    Applicants: TAISEI KAKO CO., LTD., SHIONOGI & CO., LTD.
    Inventors: Yuichi Kotori, Juichirou Kawabata, Naoki Fujisawa, Keiji Hamamoto, Takahiro Yamaguchi, Takashi Kashimoto, Shinji Hiramoto
  • Patent number: 7867434
    Abstract: A particularly small eyedropper or the like is provided, which has a construction such that, when a body thereof is squeezed, an introduction hole thereof can be easily closed to compress air in a space between an inner layer and an outer layer thereof even in the absence of a check valve in the introduction hole, and defectiveness of the introduction hole can be easily checked. To this end, a test hole (19) communicating with an introduction hole (17) via a space between an outer layer bottle (1) and an inner layer bag (16) is provided in an outer layer mouth portion (4). The test hole (19) is closed by the inner layer bag (16) and an inside plug (21) fitted in the mouth portion (4). Further, the introduction hole (17) is provided in a middle portion of a body which is pressed by a finger when the bottle is squeezed. The introduction hole (17) is closed by the finger.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: January 11, 2011
    Assignees: Taisei Kako Co., Ltd., Nihon Tenganyaku Kenkyusho Co., Ltd.
    Inventors: Kazuya Iwahashi, Hirokazu Mihashi, Keiji Hamamoto, Masaru Otsuka, Yorishisa Uetake, Kenji Matsuura
  • Patent number: 7845505
    Abstract: A container cap locking a plug member to a mouth by a locking member and capable of being removed from the mouth together with the plug member by repositioning a holder member. The locking member is covered on the container mouth so as to hold the plug and the holder member is fitted to the outer peripheral sides of a plurality of locking pieces of the locking member. In each locking piece, an upper side part is connected to a lower side part through a thin-walled bending part. The upper side part is locked to the rubber plug from the lower side with the holder member on the outer peripheral side thereof. The lower side part is locked to the container mouth from the lower side by the holder member. Locking projected parts prevent the lower end of the holder member from coming out of the upper side part.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: December 7, 2010
    Assignee: Taisei Kako Co., Ltd.
    Inventors: Keiji Hamamoto, Seiji Yoshimura, Shitomi Tamaoki
  • Publication number: 20100189942
    Abstract: A blister packaging multilayer resin film is used to produce a blister package in which an item is sealed between a support substrate and the multilayer resin film, wherein the multilayer resin film includes an oxygen barrier layer that is arranged on a side of the multilayer resin film which side faces the support substrate, and a moisture proof layer that is arranged on a side of the oxygen barrier layer which side does not face the support substrate.
    Type: Application
    Filed: June 13, 2008
    Publication date: July 29, 2010
    Applicants: SHIONOGI & CO., LTD., TAISEI KAKO CO., LTD.
    Inventors: Takumi Tamura, Shinji Hiramoto, Keiji Hamamoto, Takuya Tsuji
  • Publication number: 20090174102
    Abstract: A particularly small eyedropper or the like is provided, which has a construction such that, when a body thereof is squeezed, an introduction hole thereof can be easily closed to compress air in a space between an inner layer and an outer layer thereof even in the absence of a check valve in the introduction hole, and defectiveness of the introduction hole can be easily checked. To this end, a test hole (19) communicating with an introduction hole (17) via a space between an outer layer bottle (1) and an inner layer bag (16) is provided in an outer layer mouth portion (4). The test hole (19) is closed by the inner layer bag (16) and an inside plug (21) fitted in the mouth portion (4). Further, the introduction hole (17) is provided in a middle portion of a body which is pressed by a finger when the bottle is squeezed. The introduction hole (17) is closed by the finger.
    Type: Application
    Filed: March 6, 2009
    Publication date: July 9, 2009
    Inventors: Kazuya Iwahashi, Hirokazu Mihashi, Keiji Hamamoto, Masaru Otsuka, Yorishisa Uetake, Kenji Matsuura
  • Patent number: 7404814
    Abstract: An infusion vessel has a vessel body having an internal cavity to serve as an infusion medium space, a cylindrical discharge mouth continuing from a lower portion of the vessel body, a medicine chamber disposed in the discharge mouth and kept airtight against ambient air, and a separator intervening between the infusion medium space and the medicine chamber so as to keep the space in a liquid-tight state against the holder. The separator is subject to displacement, rotation or deformation such as to bring the infusion medium space into communication with the medicine chamber, so that the infusion vessel can be made ready for use by conducting a simple operation to mix the medicine with the infusion medium that have been separated from each other within the vessel during its normal state before use.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: July 29, 2008
    Assignee: Taisei Kako Co., Ltd.
    Inventors: Yasuyuki Shiraishi, Keiji Hamamoto, Masaharu Nakao, Makoto Kuroki, Seiji Yoshimura
  • Publication number: 20070272648
    Abstract: A container cap capable of securely locking a plug member to a mouth by a locking member when the cap is installed and capable of being easily and rapidly removed from the mouth together with the plug member merely by pulling out a holder member upward in unplugging, comprising the locking member 13 covered on the container mouth 2 so as to hold the rubber plug 3 and the holder member 14 fitted to the outer peripheral sides of the plurality of locking pieces 12 of the locking member 13. In each locking piece 12, an upper side part 12U is connected to a lower side part 12D through a thin-walled bending part 12a at the vertical intermediate part of the locking piece 12, the upper side part 12U is locked to the rubber plug 3 from the lower side with the holder member 14 fitted to the outer peripheral side thereof, and the lower side part 12D is locked to the container mouth 2 from the lower side with the holder member 14 fitted to the outer peripheral side thereof.
    Type: Application
    Filed: June 3, 2004
    Publication date: November 29, 2007
    Inventors: Keiji Hamamoto, Seiji Yoshimura, Shitomi Tamaoki
  • Publication number: 20070181449
    Abstract: This invention provides a container set for mixing at the time of administration allowing a secure mixing operation in administration without dripping chemicals by maintaining the sealed state of the mouth of liquid container particularly until the containers are connected to each other for mixing while storing two contents in the containers, respectively, wherein a tuber plug 5 is detachably fitted to the mouth part 4 of a vial 1 and a cap 30 is fitted to the mouth part 22 of the liquid container 2. The cap 30 has a first structure 31 fitted liquid-tightly to the mouth part 22 and a second structure 32 fitted liquid-tightly to the first structure 31 and having a connection port part 32a connectable liquid-tightly to the mouth part 4.
    Type: Application
    Filed: January 19, 2004
    Publication date: August 9, 2007
    Inventors: Keiji Hamamoto, Seiji Yoshimura, Shitomi Tamaoki
  • Patent number: 7115117
    Abstract: The present invention provides an infusion vessel, which is capable of separately containing a drug and a infusion liquid in a sterile manner and mixing the drug with the infusion liquid in a sterile manner by a simple operation for use, while ensuring the sterility of a connector thereof. The infusion vessel according to the present invention comprises a bag (2) for containing a infusion liquid, a two-mouth vial (3) for containing a drug, and a joint (4) connecting the bag and the vial. A lower mouth portion (33) of the vial (3) is sealed with a rubber plug (7). The joint (4) is air-tightly connected to a liquid outlet port (21) provided in a bottom portion of the bag (2), and extends downward. The joint (4) has an opening (46) for communication between the inside and the outside thereof. An O-ring (6) and an intermediate rubber plug (5) are respectively attached to the joint (4) above and below the opening (46), and fitted in the upper mouth portion (32) of the vial (3) in an axially movable manner.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: October 3, 2006
    Assignee: Taisei Kako Co., Ltd.
    Inventors: Yasuyuki Shiraishi, Keiji Hamamoto, Seiji Yoshimura
  • Publication number: 20060054635
    Abstract: A particularly small eyedropper or the like is provided, which has a construction such that, when a body thereof is squeezed, an introduction hole thereof can be easily closed to compress air in a space between an inner layer and an outer layer thereof even in the absence of a check valve in the introduction hole, and defectiveness of the introduction hole can be easily checked. To this end, a test hole (19) communicating with an introduction hole (17) via a space between an outer layer bottle. (1) and an inner layer bag (16) is provided in an outer layer mouth portion (4). The test hole (19) is closed by the inner layer bag (16) and an inside plug (21) fitted in the mouth portion (4). Further, the introduction hole (17) is provided in a middle portion of a body which is pressed by a finger when the bottle is squeezed. The introduction hole (17) is closed by the finger.
    Type: Application
    Filed: February 13, 2004
    Publication date: March 16, 2006
    Inventors: Kazuya Iwahashi, Hirokazu Mihashi, Keiji Hamamoto, Masaru Otsuka, Yorihisa Uetake, Kenji Matsuura
  • Patent number: 6708850
    Abstract: The present invention provides a discharging container whose main part is a squeeze-bottle adapted for use as eyedroppers and transparent to such a degree as required. This container has to perfectly shut off ambient air and bacteria not to flowing into a liquid content of the container so as to keep it sterilized even after unsealed for use. The discharging container has a laminated bottle 2, and a stopper 3 attached to a finish 2a of the laminated bottle, the bottle being composed of an outer layer 21 and an inner layer 22 delaminating from the outer layer 21. A vent hole 4 is formed in the outer layer so as to introduce ambient air in between the outer and inner layers 21, 22. A discharging passage 10 is formed in the stopper 3 so as to exude through it a liquid content inside the inner layer 22, and the stopper further has a check valve 8 and a filter 7 disposed on the downstream side of the valve.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: March 23, 2004
    Assignees: Taisei Kako Co., Ltd., Nihon Tenganyaku Kenkyusyo Co., Ltd.
    Inventors: Yorihisa Uetake, Keiji Hamamoto, Yasuyuki Shiraishi
  • Patent number: 6672479
    Abstract: A closing member 3 is equipped with a dispensing valve 8 and a filter 7. The valve 8 is deformed resiliently to shift its valve head 82 downstream with its orifice 82a remaining closed if pressure less than a first predetermined pressure and more than a second predetermined pressure is acted on the inner surface of the valve head 82. The valve 8 returns to its original shape to shift the valve head 82 upstream with its orifice 82a remaining closed if the pressure is removed, thereby sucking fluid remaining within the passage 10 back to the upstream side of the filter 7. The closing member 3 has a supporter 31d that prevents the orifice 82a of the valve head 82 from opening when a negative pressure is generated in the bottle.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: January 6, 2004
    Assignees: Taisai Kako Co., Ltd./Nihon Tenganyaku, Kenkyusyo Co., Ltd.
    Inventors: Yasuyuki Shiraishi, Keiji Hamamoto, Hirokazu Mihashi
  • Patent number: 6649121
    Abstract: The present invention provides a method of making laminated bottles each having an outer layer and an inner layer capable of delaminating from the former layer. The method consists of the step of injection molding an outer preform from a molten first resin, and the next step of injection molding an inner preform inside the outer preform, using a molten second resin. The method further has the final step of blow molding a parison composed of the outer and inner preforms so as to form each laminated bottle. The second resin has a melting point lower than that of the first resin, nevertheless and contrarily to the prior art, precise parisons affording satisfactory lamination can now be prepared by the injection molding steps. In addition, ventilation holes are formed in the outer layer readily and surely without damaging the inner layer.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: November 18, 2003
    Assignee: Taisei Kako Co., Ltd.
    Inventors: Keiji Hamamoto, Hirokazu Mihashi
  • Publication number: 20030158537
    Abstract: The present invention provides an infusion vessel, which is capable of separately containing a drug and a infusion liquid in a sterile manner and mixing the drug with the infusion liquid in a sterile manner by a simple operation for use, while ensuring the sterility of a connector thereof. The infusion vessel according to the present invention comprises a bag (2) for containing a infusion liquid, a two-mouth vial (3) for containing a drug, and a joint (4) connecting the bag and the vial. A lower mouth portion (33) of the vial (3) is sealed with a rubber plug (7). The joint (4) is air-tightly connected to a liquid outlet port (21) provided in a bottom portion of the bag (2), and extends downward. The joint (4) has an opening (46) for communication between the inside and the outside thereof. An O-ring (6) and an intermediate rubber plug (5) are respectively attached to the joint (4) above and below the opening (46), and fitted in the upper mouth portion (32) of the vial (3) in an axially movable manner.
    Type: Application
    Filed: February 19, 2003
    Publication date: August 21, 2003
    Applicant: Taisei Kako Co., Ltd.
    Inventors: Yasuyuki Shiraishi, Keiji Hamamoto, Seiji Yoshimura
  • Publication number: 20030105448
    Abstract: An infusion vessel has a vessel body having an internal cavity to serve as an infusion medium space, a cylindrical discharge mouth continuing from a lower portion of the vessel body, a medicine chamber disposed in the discharge mouth and kept airtight against ambient air, and a separator intervening between the infusion medium space and the medicine chamber so as to keep the space in a liquid-tight state against the holder. The separator is subject to displacement, rotation or deformation such as to bring the infusion medium space into communication with the medicine chamber, so that the infusion vessel can be made ready for use by conducting a simple operation to mix the medicine with the infusion medium that have been separated from each other within the vessel during its normal state before use.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 5, 2003
    Inventors: Yasuyuki Shiraishi, Keiji Hamamoto, Masaharu Nakao, Makoto Kuroki, Seiji Yoshimura
  • Publication number: 20030020193
    Abstract: The present invention aims at usage of a noncontact sensor to position preforms so that angular position of each preform can be adjusted finely to take a precisely correct position before stretched and blow molded, without incurring the problem of dusting.
    Type: Application
    Filed: July 25, 2002
    Publication date: January 30, 2003
    Applicant: Taisei Kako Co., Ltd.
    Inventors: Keiji Hamamoto, Taizo Kimura