Patents Assigned to Preco Corporation
  • Electrostatic reproduction process employing novel transfer paper
    Patent number: 3933489
    Abstract: Electrostatic reproduction processes utilizing papers which have a surface resistivity of not more than 0.9-3 .times. 10.sup.11 IPC ohmn/square at a relative humidity of 25 percent and a surface resistivity of not more than 25-60 .times. 10.sup.11 IPC ohms/square at a relative humidity of 10 percent.
    Type: Grant
    Filed: February 21, 1974
    Date of Patent: January 20, 1976
    Assignee: Preco Corporation
    Inventor: Wally Z. Walters