Patents by Inventor William Knapman

William Knapman 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).

  • Tipping assembly for an elongate smoking article
    Patent number: 4587982
    Abstract: A cylindrical filter element for a cigarette is wrapped in a ventilated tipping wrapper which is spaced from the filter element by a raised pattern of thermoplastic material printed on the inner surface of the wrapper. The pattern is designed to provide air channels communicating with the ventilations in the wrapper and leading to the mouth end of the filter. This enables the manufacturer to dispense with a separate spacing member which has hitherto been located between the filter and the tipping wrapper. The invention includes a method of making a filter element including such a raised pattern.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: May 13, 1986
    Assignee: Imperial Group PLC
    Inventors: Peter I. Adams, Raymond A. Bryant, William Knapman