Method of manufacturing lamelliform earthenware

Claim 1

A METHOD OF PREPARING VITRIFIED LAYERED CERAMIC SHEETWARE OF CHARACTERISTIC UNIDIRECTIONAL SHRINKAGE ALONG THE THICKNESS THEREOF DURING FIRING, COMPRISING THE STEPS OF SPREADING FIRST ON AN INERT FIRE RESISTANCE SUPPORT AN ISOLATING AQUEOUS CERAMIC PASTE LAYER OF UNIDIRECTIONAL SHRINKAGE DURING FIRING SERVING AFTER HEATING TO FACILITATE THE SEPARATION OF THE VITRIFIED TILE PRODUCT FROM THE INERT SUPPORT, SAID ISOLATING PASTE LAYER CONTAINING ON DRY WEIGHT BASIS AN AMOUNT RANGING ABOUT A QUARTER OF PLASTIC CLAY AND FEW UNITS PER THOUSAND OF COLLOIDAL BENTONITE, THE REMAINDER COMPRISING CHIEFLY LIMESTONE, THEREAFTER SPREADING ON SAID LAYER FIRING AT LEAST ONE UNFIRED AQUEOUS CERAMIC PASTE LAYER OF UNIDIRECTIONAL SHRINKAGE DURING FIRING, THIS LATTER AQUEOUS PASTE CONSISTING OF A GROUND MIXTURE CONTAINING PRINCIPALLY ON A DRY WEIGHT BASIS AN AMOUNT RANGING ABOUT 8% OF KAOLIN, 7% OF TALC, 0.5% OF COLLOIDAL BENTONITE, 0.1% OF SODIUM PHOSPHATE THE REMAINDER CONSISTING OF LEAN INGREDIENTS GROUND TO A PARTICLE DIAMETER OF LESS THAN ONE MILLIMETER, THEREAFTER SPREADING A THIN LAYER OF ENAMEL GLAZE, FIRING THE PLURAL LAYERS TO VITRIFY AND SOLIDIFY THE CREAMIC SHEETWARE, AND SEPARATING FROM THE INERT SUPPORT THE FIRED TILE THUS FORMED, WHICH LATTER OPERATION IS FACILITATED AFTER HEATING BY THE PRESENCE OF THE ISOLATING LAYER.

Claim 2

A METHOD OF PREPARING VITRIFIED LAYERED CERAMIC SHEETWARE OF CHARACTERISTIC UNIDIRECTIONAL SHRINKAGE ALONG THE THICKNESS THEREOF DURING FIRING, COMPRISING THE STEPS OF SPREADING FIRST ON AN INERT FIRE RESISTANCE SUPPORT AN ISOLATING AQUEOUS CERAMIC PASTE LAYER OF UNIDIRECTIONAL SHRINKAGE DURING FIRING SERVING AFTER HEATING TO FACILITATE THE SEPARATION OF THE VITRIFIED TILE PRODUCT FROM THE INERT SUPPORT, SAID ISOLATING PASTE LAYER CONTAINING ON DRY WEIGHT BASIS AN AMOUNT RANGING ABOUT A QUARTER OF PLASTIC CLAY AND FEW UNITS PER THOUSAND OF COLLOIDAL BENTONITE, THE REMAINDER COMPRISING CHIEFLY LIMESTONE, THEREAFTER SPREADING ON SAID LAYER FIRING AT LEAST ONE UNFIRED AQUEOUS CERAMIC PASTE LAYER OF UNIDIRECTIONAL SHRINKAGE DURING FIRING, THIS LATTER AQUEOUS PASTE CONSISTING OF A GROUND MIXTURE CONTAINING PRINCIPALLY ON A DRY WEIGHT BASIS AN AMOUNT RANGING ABOUT 8% OF KAOLIN, 7% OF TALC, 0.5% OF COLLOIDAL BENTONITE, 0.1% OF SODIUM PHOSPHATE THE REMAINDER CONSISTING OF LEAN INGREDIENTS GROUND TO A PARTICLE DIAMETER OF LESS THAN ONE MILLIMETER, THEREAFTER SPREADING A THIN LAYER OF ENAMEL GLAZE, FIRING THE PLURAL LAYERS TO VITRIFY AND SOLIDIFY THE CREAMIC SHEETWARE, AND SEPARATING FROM THE INERT SUPPORT THE FIRED TILE THUS FORMED, WHICH LATTER OPERATION IS FACILITATED AFTER HEATING BY THE PRESENCE OF THE ISOLATING LAYER.