Abstract: Methods and apparatus for making paint roller covers by spirally wrapping a strip of hot thermoplastic film onto an exterior surface of a thermoplastic tubular form and spirally wrapping fabric strip having a thermoplastic backing onto the spiral wound strip of thermoplastic film while the thermoplastic film is still sufficiently hot to cause the thermoplastic film to flow into interstices in the fabric backing and permanently bond the fabric strip to the exterior surface of the tubular form. The tubular form may either comprise a plurality of preformed tubes or be formed by spirally wrapping a continuous length of core strip material around a mandrel while maintaining the adjacent edges of the core strip material in closely spaced, nonoverlapping relation to form a spiral seam between the core strip edges.

Abstract: A method and apparatus for making paint roller covers by spirally advancing a thermoplastic tubular form past a plurality of electronic corona discharge heads arranged in a helical path around the tubular form to subject substantially the entire exterior surface of the tubular form to high frequency, high voltage sparks as the tubular form spirally advances past the heads to make substantially the entire exterior surface more receptive to adhesion when a uniform layer of epoxy adhesive is subsequently applied to the treated exterior surface of the tubular form. Next a fabric strip is spirally wrapped over the epoxy adhesive to bond the fabric strip to the tubular form. To make the exterior surface of the tubular form still more receptive to adhesion, the exterior surface may be preheated immediately prior to treating the exterior surface with high voltage sparks.

Abstract: A paint roller cover with thermoplastic core and method and apparatus for making same by spirally wrapping a strip of hot extruded thermoplastic film onto an exterior surface of hollow thermoplastic tubing and spirally wrapping a strip of fabric having a thermoplastic backing onto the spiral wound strip of thermoplastic film while the thermoplastic film is still sufficiently hot to cause the thermoplastic film to flow into interstices in the thermoplastic backing of the fabric and permanently bond the fabric to the exterior surface of the tubing. The fabric covered tubing is then cooled and separated into a plurality of individual lengths of fabric covered tubes.

Abstract: A method and apparatus for making a paint roller cover by spirally wrapping a strip of hot extruded thermoplastic film onto an exterior surface of hollow thermoplastic tubing and spirally wrapping a strip of fabric having a thermoplastic backing onto the spiral wound strip of thermoplastic film while the thermoplastic film is still sufficiently hot to cause the thermoplastic film to flow into interstices in the thermoplastic backing of the fabric and permanently bond the fabric to the exterior surface of the tubing. The fabric covered tubing is then cooled and separated into a plurality of individual lengths of fabric covered tubes.