Patents Assigned to Nihon Tenganyaku Kenkyusyo Co., Ltd.
  • Patent number: 8490839
    Abstract: In a filtering dispenser container which includes a plug attached to a mouth portion of a bottle thereof and having a liquid discharge passage, and a filter and a check valve provided in the discharge passage, air lock is prevented, even if the container contains a highly percolative liquid, by preventing a very small amount of liquid percolating the check valve from reaching the filter. In the filtering dispenser container, a dam (14) is provided between the check valve (23) and the filter (25) for retaining a very small amount of the liquid percolating the check valve (23) when the check valve is closed. Thus, the filter (25) is prevented from being wetted with the liquid percolating the closed check valve (23) during storage or delivery of the container before the first use of the container.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: July 23, 2013
    Assignees: Taisei Kako Co., Ltd., Nihon Tenganyaku Kenkyusyo Co., Ltd.
    Inventors: Hirokazu Mihashi, Seiji Yoshimura, Kazuko Suzuki, Yorihisa Uetake, Norio Hoshi, Shinji Matsuda, Hidetoshi Kondo
  • Patent number: 7971753
    Abstract: A filter-equipped container which, particularly in a small-sized eyedrop bottle or the like, is capable of accurate dropping while preventing bubbles from being involved when a contents liquid is to be delivered through a delivery port. To solve such problem, a plug body 12 disposed in the mouth of a bottle 10 is provided with a delivery passage for delivering contents liquid received in the bottle 10, the delivery passage being provided with a filter 25. The filter 25 is composed of a filter film 25a for filtering bacteria to prevent the latter from permeating from upstream to downstream as seen in the direction of delivery, and a contents liquid holding member 25b of porous material that has microscopic pores, disposed upstream of the filter film 25a, the contents liquid holding member 25b being in planar contact with the filter film 25a.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: July 5, 2011
    Assignees: Taisei Kako Co., Ltd., Nihon Tenganyaku Kenkyusyo Co., Ltd.
    Inventors: Hirokazu Mihashi, Yasuyuki Shiraishi, Masaru Otsuka, Yorihisa Uetake
  • Publication number: 20070090044
    Abstract: This invention provides a filter-equipped container which, particularly in a small-sized eyedrop bottle or the like, is capable of accurate dropping while preventing bubbles from being involved when a contents liquid is to be delivered through a delivery port. To solve such problem, a plug body 12 disposed in the mouth of a bottle 10 is provided with a delivery passage for delivering contents liquid received in the bottle 10, the delivery passage being provided with a filter 25. The filter 25 is composed of a filter film 25a for filtering bacteria to prevent the latter from permeating from upstream to downstream as seen in the direction of delivery, and a contents liquid holding member 25b of porous material disposed upstream of the filter film 25a, the contents liquid holding member 25b being in planar contact with the filter film 25a.
    Type: Application
    Filed: September 17, 2004
    Publication date: April 26, 2007
    Applicants: TAISEI KAKO CO., LTD., NIHON TENGANYAKU KENKYUSYO CO., LTD.
    Inventors: Hirokazu Mihashi, Yasuyuki Shiraishi, Masaru Otsuka, Yorihisa Uetake
  • 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