Process for producing decorative surface covering

Claim 1

A PROCESS FOR PRODUCING A DECORATIVE WEAR RESISTANT RESINOUS COMPOSITION SHEET WHICH COMPRISES MIXING THERMOPLASTIC DECORATIVE CHIPS HAVING A THICKNESS OF ABOUT ONE-THIRD TO ABOUT SEVEN-EIGHTS OF THE THICKNESS OF THE FINAL SHEET, WITH A TACKY, VISCOUS LIQUID PLASTISOL COMPRISING A DISPERSION OF FINE PARTICLES OF UNFUSED AND UNPLASTICIZED VINYL RESIN IN A LIQUID PLASTICIZER AND HAVING A VISCOSITY OF AT LEAST 10**6 CENTIPOISES, TO COMPLETELY COAT SAID CHIPS WITH SIAD LIQUID PLASTISOL, PASSING THE MIXTURE OF PLASTISOL AND CHIPS BETWEEN CALENDER ROLLS TO FORM SAID MIXTURE INTO A THIN FILM HAVING A THICKNESS CORRESPONDING TO THE DISTANCE BETWEEN SAID CALENDER ROLLS, SAID ROLLS BEING HEATED TO A TEMPERATURE SUFFICIENT TO AT LEAST PARTIALLY FUSE AND PLASTICIZE SAID DISPERSED VINLY RESIN, ALLOWING SAID THIN LIQUID FILM TO REMAIN IN CONTACT WITH ONE OF SAID ROLLS UNTIL THE FILM IS CONVERTED TO A SOLID, SELF-SUPPORTING SHEET, THEREAFTER FURTHER HEATING SAID SHEET TO COMPLETELY FUSE AND PLASTICIZE THE DISPERSED VINYL RESIN AND THEN COOLING THE COMPOSITION SHEET THUS PRODUCED.