Patents by Inventor Christopher Deverell

Christopher Deverell 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).

  • Voided films of polyester with polyolefin particles
    Patent number: 4187113
    Abstract: Opaque voided films having a total luminous transmission not exceeding 25% are made from blends of a polyester preferably polyethylene terephthalate, with 3 to 27% of an ethylene or propylene polymer, prepared by dry blending. One end use of the film, as a base for photographic prints is also described.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: February 5, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Carl F. Mathews, Christopher Deverell, Gordon E. A. Pears, Peter G. Knowles
  • Splicing process and apparatus
    Patent number: 4129469
    Abstract: Webs such as thermoplastics films are spliced together by electrostatic charges while moving at equal speeds. Particularly useful in the production of thermoplastics such as polyethylene terephthalate films and in a preferred embodiment facilitates the threading of the film after a malfunction, e.g., splitting in the stenter. The production web is fed to a dump while splicing and rethreading is effected by feeding a leader web through a subsequent stage of the apparatus, e.g., to a wind-up device. The leader web is fed into the wind-up at the same speed as the production web passing to dump and the webs are spliced together by electrostatic charges. The web passing to dump and the feed of the leader web are severed in that order.
    Type: Grant
    Filed: July 12, 1977
    Date of Patent: December 12, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Christopher Deverell, Ronald W. Wells
  • Opaque molecularly oriented and heat set linear polyester film and process for making same
    Patent number: 3944699
    Abstract: Opaque voided films having a total luminous transmission not exceeding 25% are made from blends of a polyester preferably polyethylene terephthalate, with 3 to 27% of an ethylene or propylene polymer, prepared by dry blending. One end use of the film, as a base for photographic prints is also described.
    Type: Grant
    Filed: October 19, 1973
    Date of Patent: March 16, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Carl Fraser Mathews, Christopher Deverell, Gordon Edmund Alfred Pears, Peter George Knowles