Production of moistureproof sheet wrapping materials

Claim 1

A PROCESS FOR FORMING A SMOOTH CONTINUOUS COATING OF A SYNTHETIC ORGANIC FILM-FORMING POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF ETHYLENICALLY UNSATURATED COMPOUNDS ON THE SURFACE OF A TRAVELLING FILM OF A WATER-SENSITIVE ORGANIC NON-FIBROUS MATERIAL WHICH PROCES COMPRISES APPLYING TO THE FILM A THIN COATING OF A LIQUID AQUEOUS DISPERSION OF SAID POLYMER AND BEFORE THE AQUEOUS PHASE OF THE AQUEOUS DISPERSION OF THE COATING HAS BEEN INBIBED BY THE FILM, BRINGING THE COATED SURFACE OF THE FILM INTO CONTACT WITH THE BARREL OF A WATER WET SMOOTHING ROLLER ROTATING IN SUCH A DIRECTION THAT AT THE ZONE OF CONTACT OF THE ROLLER WITH THE COATED SURFACE OF SAID FILM, THE BARRELL OF THE ROLLER IS MOVING IN A DIRECTION OPPOSITE TO THE DIRECTION OF TRAVEL OF THE COATED FILM, EACH POINT ON THE BARREL OF THE ROLLER BEING SUPPLIED WITH A FRESH FILM OF WATER UPON EACH REVOLUTION OF THE ROLLER BEFORE MAKING FRESH CONTACT WITH THE COATED FILM.