Patents Assigned to Pioneer Industrial Co.
  • Patent number: 5345652
    Abstract: A refill eraser comprises at least one refill member. Each refill member includes a holding barrel having a partition portion and a plurality of rotation-preventive ridges formed on an inner peripheral surface of its front portion, and an eraser body having a generally frustro-conical front end portion, a cylindrical intermediate portion, and a cylindrical rear end portion. The eraser body is press-fitted into and held at its rear end portion and intermediate portion within the front portion of the holding barrel with its rear end portion and intermediate portion engaged with the ridges and with its rear end supported by the partition portion. The front end portion of the eraser body protrudes from the front end of the holding barrel. A plurality of the refill members are refillably held within an elongated tubular shaft. A front end of the eraser body located on the foremost end protrudes from a front end of the tubular shaft.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: September 13, 1994
    Assignee: Pioneer Industrial Co.
    Inventor: Cheng-Hwa Chuang