Method of making printed felt base floor coverings

Claim 1

IN THE MANUFACTURE OF PRINTED FELT BASE FLOOR COVERING BY A PROCESS WHICH INCLUDES COATING A SHEET OF ASPHALTSATURATED FELT WITH AN OLEORESINOUS COATING; APPLYING AN ADHESIVE COATING CONTAINING ABOUT 20% TO ABOUT 50% BINDER INCLUDING ABOUT 80% TO ABOUT 50% INERT FILLER, SAID BINDER INCLUDING ABOUT 25% TO ABOUT 80% TACKIFIER SELECTED FROM THE GROUP CONSISTING OF STYRENE-BUTADIENE COPOLYMERS, ACRYLONITRILE-BUTADIENE COPOLYMERS, ISOBUTYLENE-ISOPRENE COPOLYMERS, AND POLYCHLOROPRENE, AND ABOUT 75% TO 20% REINFORCING AGENT SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, COPOLYMERS OF POLYVINYL CHLORIDE AND POLYVINYL ACETATE, COPOLYMERS OF POLYVINYL CHLORIDE AND POLYVINYLIDENE CHLORIDE, STYRENE-BUTADIENE COPOLYMERS, AND POLYSTYRENE OVER SAID OLEORESINOUS COATING; BLOCK PRINTING A DECORATIVE VINYL RESIN COATING OVER SAID ADHESIVE COATING; AND FUSING SAID BLOCK PRINTED VINYL RESIN FILM, THE THE IMPROVEMENT COMPRISING COATING SAID IMPREGNATED FELT WITH A BUTADIENE-STYRENE COPOLYMER SIZE COAT PRIOR TO APPLICATION OF SAID OLEORESINOUS COATING WHEREBY BLISTERING OF THE DECORATIVE VINYL FILM DURING FUSION AT TEMPERATURES OF ABOUT 280* F. TO ABOUT 350* F. IS PREVENTED.