Patents Assigned to Penntech Papers, Inc.
  • High mineral composite fine paper
    Patent number: 4445970
    Abstract: Composite fine paper suitable for offset and gravure printing at high speeds and containing over 30% filler up to 70% filler for basis weights of 30-150 lbs/3300 ft.sup.2, is produced on a high speed paper-making machine from a furnish containing large quantities of filler, preferably a mixture of clay and talc, and including 3-7% of an ionic latex which is selected to provide good retention and good strength without leaving a residue on the screen.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: May 1, 1984
    Assignee: Penntech Papers, Inc.
    Inventors: Richard L. Post, Robert G. Fort