Patents Assigned to Mitsubishi Pencil Kabushiki Kaishaki
  • Writing instrument
    Patent number: 6398442
    Abstract: A free-ink collector type writing implement includes ink (12) having a low viscosity of 2 to 100 mPa S, a collector (6) having both an internal pressure regulating function and an ink guiding feed, and a thin reservoir (1) having an ink holding capability connected with the ink guiding feed is accommodated in an ink tank (7), wherein the volumes of the reservoir (1), the ink tank (7) and the collector (6) are set to have an optimum relationship. Furthermore, the ink tank (7) is separated into two parts by a ring (13).
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: June 4, 2002
    Assignee: Mitsubishi Pencil Kabushiki Kaishaki
    Inventor: Kazuhiko Furukawa