Patents by Inventor John D. Sawkins

John D. Sawkins 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).

  • Two-compartment container
    Patent number: 6065643
    Abstract: A two-compartment container (10) comprises two flexible "D" shaped cross section tubular housings (11) each having a respective shoulder (17) with a nozzle (25). The two tubular housings (11) each have a flat portion (14) and an arcuate portion (15) and are held in side-by-side relationship so that the flat portions (14) are in contact over substantially their entire widths and lengths.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: May 23, 2000
    Assignee: Betts UK Limited
    Inventors: John W. Harvey, John D. Sawkins
  • Method of manufacture of flexible tube containers
    Patent number: 5942071
    Abstract: A method of manufacture of a shaped flexible tube container, typically having a square or "D" section tube, from a flexible plastic tube (15) of substantially round cross section, in which longitudinally extending creases (31, 32) are formed in the wall of the tube by a creasing means (16, 17) acting on the external surface of the tube. The creasing means preferably comprise at least air of rollers (16 or 17) and the tube passes between the two rollers.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: August 24, 1999
    Assignee: Courtaulds Packaging Limited
    Inventor: John D. Sawkins