Patents Assigned to James River Graphics Limited
  • Coating composition and coated paper
    Patent number: 5145749
    Abstract: Erasable coatings for xerography paper comprise a pigment such as calcium carbonate in a binder such as an aqueous emulsion of an acrylic polymer. The erasability of the coating is improved by replacing at least 15 wt % of the binder with a polyalkane or (preferably) polyalkene wax, such as an aqueous emulsion of a polyolefin.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: September 8, 1992
    Assignee: James River Graphics Limited
    Inventor: Michael K. Matthew
  • Photographic base paper
    Patent number: 5126187
    Abstract: Photographic base paper comprising a surface ply 1 of photographic grade paper and at least one backing ply 3 of a stronger paper such as a kraft paper provides smoothness and rigidity at least as good as conventional wholly photographic grade paper at reduced raw materials cost. Preferred weight of the surface ply is a range of from 20 to 50 gm.sup.-2.The paper can be made on a two-wire Fourdrinier machine (FIG. 5) or on a single wire machine with a secondary headbox (FIGS. 6 and 7).
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: June 30, 1992
    Assignee: James River Graphics Limited
    Inventors: Vaughan W. Punton, Bronislaw Radvan, George Tyler