Patents by Inventor William Raymond Buchan

William Raymond Buchan 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: 3947113
    Abstract: An improved apparatus is disclosed for transferring toner from the surface of a toner-bearing drum, such as a xerographic drum, to a support medium for the toner, such as plain paper. The improvement relates to apparatus of the type which employs a transfer web or belt to remove toner from the toner-bearing drum and to transfer it to a support medium. In such apparatus, it is typical for the transfer web to be at least partially driven by means of its contact with the toner-bearing drum and/or transfer rollers.The improvement described herein comprises providing means for simultaneously disengaging the toner-bearing drum and at least one of the transfer rollers from the transfer web at least once per web cycle, and also providing means for mechanically correcting web alignment and registration while the toner-bearing drum and transfer roller are disengaged. Suitable means for disengaging the toner-bearing drum and transfer roller include the provision of indented surfaces on the drum and transfer roller.
    Type: Grant
    Filed: January 20, 1975
    Date of Patent: March 30, 1976
    Assignee: Itek Corporation
    Inventors: William Raymond Buchan, James A. Kulpan, Edward Francis Mayer