Patents by Inventor Gillian H. Betts

Gillian H. Betts 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).

  • Patent number: 5162289
    Abstract: A subcoat of plastic pigment particles and a binder is provided beneath the microcapsule coating of otherwise conventional pressure-sensitive copying paper of the CB or CFB type. The plastic pigment particles may be hollow or solid. Inorganic pigment particles are preferably also present in the subcoat. The binder may be a mixture of styrene/butadiene latex and polyvinyl alcohol. The subcoat typically has a coatweight of 3 to 6 g m.sup.-2. The presence of the plastic pigment subcoat improves copying intensity, or permits a desired given copy intensity to be obtained at a lower microcapsule coatweight.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: November 10, 1992
    Assignee: The Wiggins Teape Group Limited
    Inventors: Gillian H. Betts, Terence Reid