Patents Assigned to General Porcelain Mfg. Co.
  • Composition of a conductive ceramic glaze and improved method of forming same
    Patent number: 4276204
    Abstract: A composition of matter utilized by particular method for forming an electrically conductive glaze upon the outer surface of a ceramic mold form wherein the combination includes approximately 33 percent soda feldspar, approximately 20 percent flint, approximately 9 percent calcium carbonate, approximately 1 to 2 percent ball clay, approximately 2 percent kaolin, approximately 7 percent zinc oxide and approximately 27 percent black iron oxide, all percentages being taken by weight, the method including the addition of an amount of flocculant such as 20 percent magnesium sulfate solution or deflocculant such as sodium tetrapyrophosphate or sodium silicate to control the viscosity of the solution and thereby control the thickness of the layer formed upon the external surface of the ceramic mold form, including the spraying or dipping of the mold form in the resulting solution for coating thereof as well as the firing of the coated ceramic mold form in a furnace or approximately 2200 to 2300 degrees Fahrenheit fo
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: June 30, 1981
    Assignee: General Porcelain Mfg. Co.
    Inventor: Victor Chester
  • Composition of a conductive ceramic glaze and method of forming same
    Patent number: 4183830
    Abstract: A composition of matter which is useful by a particular method for forming an electrically conductive glaze upon the outer surface of a ceramic mold form wherein the combination includes approximately 25 percent potash feldspar, approximately 22 percent flint, approximately 7 to 8 percent calcium carbonate, approximately 1 to 2 percent ball clay, approximately 2 to 4 percent kaolin, approximately 5 percent barium carbonate and approximately 35 percent red iron oxide, all percentages being taken by weight, the method including the addition of an amount of flocculant such as 20 percent magnesium sulfate solution to control the viscosity of the solution and thereby control the thickness of the layer formed upon the external surface of the ceramic mold form, the method also including preferably the spraying or dipping of the mold form in the resulting solution for coating thereof as well as the firing of the coated ceramic mold form in a furnace of approximately 2200 to 2300 degrees Fahrenheit for approximately a
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: January 15, 1980
    Assignee: General Porcelain Mfg. Co.
    Inventor: Victor J. Chester