Patents by Inventor Wilhelm Loewel

Wilhelm Loewel 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: 6038422
    Abstract: A toner cartridge has a hollow-cylindrical main body which is rotatably driveable about is longitudinal axis and has two opposite end sides, the main body being provided in one of the end sides with an outlet opening having a smaller diameter than a diameter of a remaining part of the main body, and at least one substantially truncated-cone-shape, hollow inner body arranged in an interior of the main body, the inner body having one end with a smaller diameter opening into the outlet opening of the main body and another end with a greater diameter connected with the other end side of the main body, the inner body in a region of the end of a greater diameter having a radial recess provided in a wall of the inner body, the main body on its inner surface being provided with a spiral-shaped formation which during rotation of the cartridge transports the toner to the recess of the inner body, the inner body on its inner surface being provided with a spiral-shaped formation which during rotation of the cartridge tra
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: March 14, 2000
    Assignee: R. & A. Leibfarth GmbH Verpackungstechnik
    Inventor: Wilhelm Loewel