Patents Assigned to Michael Albert Chapman Walker
  • Film cleaning apparatus and method
    Patent number: 5649262
    Abstract: A film cleaning apparatus has a container (32) in which a film (22) is exposed to mercury. This may be achieved by immersing the film in a mercury bath (34), exposing the film to mercury pressure jets (44,46) or a combination of both. The mercury effects removal of contamination such as dust particles and grease from the surface of the film.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: July 15, 1997
    Assignee: Michael Albert Chapman Walker
    Inventors: Michael Albert Chapman Walker, Terence Andrew Watts