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AssigneeThe Wooster Brush Company
InventorsWilliam J. Roberts, Steven V. Middlesworth, Ricky L. Dilyard, Serafin J. Gerardo, Dennis D. Humphrey
Estimating the term…
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. In the latter case, the adjacent edges of the hot thermoplastic film may be overlapped outwardly of the spiral seam to provide additional adhesive at the spiral seam for flow into the spiral seam and into the interstices in the fabric backing outwardly of the spiral seam.
A method of making roller covers comprising the steps of spirally wrapping a hot thermoplastic film around a thermoplastic tubular form, and spirally wrapping a fabric strip around the thermoplastic film while the thermoplastic film is sufficiently hot to cause the thermoplastic film to bond the fabric strip to the tubular form.
A method of making roller covers comprising the steps of spirally wrapping a continuous length of thermoplastic core strip material around a mandrel while positioning a spacer between adjacent edges of each successive wrap of the core strip material around the mandrel to prevent such adjacent edges of the core strip material from overlapping each other on the mandrel thus forming a spiral seam between the adjacent edges of the core strip material, applying a layer of adhesive on the spirally wrapped core strip material, and spirally wrapping a fabric strip over the adhesive layer to bond the fabric strip to the core strip material.
Apparatus for making roller covers comprising means for spirally wrapping a continuous length of thermoplastic core strip material around a mandrel, a spacer positioned between adjacent edges of each successive wrap of the core strip material around the mandrel to prevent such adjacent edges of the core strip material from overlapping each other to provide a spiral seam between such adjacent edges, means for applying a layer of adhesive over the spirally wrapped core strip material, and means for spirally wrapping a fabric strip over the adhesive layer to bond the fabric strip to the core strip material.
Apparatus for making roller covers comprising means for wrapping a hot thermoplastic film around a thermoplastic tubular form, and means for spirally wrapping a fabric strip around the thermoplastic film while the thermoplastic film is sufficiently hot to cause the thermoplastic film to bond the fabric strip to the tubular form.
Dependencies are inferred from the claim text.