Patents Assigned to Material Engineering Technology Lab., Inc.
  • Patent number: 5423793
    Abstract: The present invention provides a stopper device comprising a stopper-support structure having a passage inside and a stopper accommodated in the-passage so as to block the passage but movably in the passage, as well as an apparatus containing the stopper device, used for mixing of two components. The stopper device can be penetrated with a connecting device with no edge and therefore generates no debris during penetration and reliably prevents leakage of container contents.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: June 13, 1995
    Assignee: Material Engineering Technology Lab., Inc.
    Inventors: Keinosuke Isono, Tatsuo Suzuki