Patents by Inventor Kuangti T. Cheng

Kuangti T. Cheng 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).

  • Toned member cleaning by electrified roller
    Patent number: 5469247
    Abstract: Cleaning roller (7) contacts intermediate transfer roller (4), each rotating at the same surface speed to avoid rubbing. The cleaning roller has an electric potential sufficient to remove toner from the transfer roller to clean it. Silicone oil is applied by a roller 29, which is wetted by oil from a oil impregnated wiper (31). The oil facilitates cleaning and reduces wear of the intermediate transfer roller, which is typically soft to facilitate transfer.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: November 21, 1995
    Assignee: Lexmark International, Inc.
    Inventors: Kuangti T. Cheng, Ashok Murthy, Jeanne M. Saldanha-Singh, Pramod K. Sharma
  • Imaging apparatus with paper preconditioning for transfer
    Patent number: 5412459
    Abstract: In an electrostatic printer (1) paper (11) is first conditioned by being thoroughly dried by rollers (13 and 15), which also immobilize the paper so that it does not wrinkle. The paper is then kept hot on flat plate 17 before it moves into the transfer nip of intermediate transfer drum (5) and transfer roller (7). The paper does not wrinkle on the plate and toner image is transferred to a wide range of papers with exceptional quality and consistency.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: May 2, 1995
    Assignee: Lexmark International, Inc.
    Inventors: John E. Borsuk, Kuangti T. Cheng, Joe D. Moss, Robert G. Newman, Pramod K. Sharma