Patents Assigned to Caribonum Limited
  • Patent number: 5231118
    Abstract: The invention relates to a pressure-activatible correcting tape, which has a conventional carrier and a lift-off layer for removing typed or printed type images, the lift-off layer containing a wax, a binder and optionally further additives. This correcting tape is characterized in that the lift-off layer contains approximately 5 to 35% by weight of butyl rubber, approximately 30 to 90% by weight of wax and approximately 0.1 to 5% by weight of a dispersant having a dispersing action in an aqueous medium for the aforementioned substances. The lift-off layer can be produced by means of an aqueous coating liquid, which is environmentally advantageous compared with organic dispersants. This correcting tape can be used without restriction and independently of the type of typewriter.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: July 27, 1993
    Assignee: Caribonum Limited
    Inventors: Ian Hogarth, Andrew Scott, Christine Abbott, Robert I. Wilkinson
  • Patent number: 4950536
    Abstract: An invention relates to a pressure-activatible correcting tape, which has a conventional carrier and a lift-off layer for removing typed or printed type images, the lift-off layer containing a wax, a binder and optionally further additives. This correcting tape is characterized in that the lift-off layer contains approximately 5 to 35% by weight of butyl rubber, approximately 30 to 90% by weight of wax and approximately 0.1 to 5% by weight of a dispersent having a dispersing action in an aqueous medium for the aforementioned substances. The lift-off layer can be produced by means of an aqueous coating liquid, which is environmentally advantageous compared with organic dispersents. This correcting tape can be used without restriction and independently of the type of typewriter.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: August 21, 1990
    Assignee: Caribonum Limited
    Inventors: Ian Hogarth, Andrew Scott, Christina Abbott, Robert I. Wilkinson
  • Patent number: 4107327
    Abstract: This application is concerned with solvent coated carbon papers which consist of a base sheet, a layer of porous material with colored ink contained within the pores in which the porous material comprises a mixture of a cellulose ester and an acrylic resin.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: August 15, 1978
    Assignee: Caribonum Limited
    Inventors: Edward Arthur Tilson, Raymond Leonard Mayhew