Replaceable roll covers with repositionable pressure sensitive adhesive

A pull roll assembly for traversing an advancing web, the pull roll assembly comprising:

• a pull roll having an axis and a cylindrical outer surface;
• a pull roll cover helically wrapped about at least that portion of the cylindrical outer surface of the pull roll that engages an advancing web, the pull roll cover being defined by a substrate sheet having first and second sides, the second side being defined by the outer ends of a plurality of cylindrically shaped stems projecting radially outwardly relative to the pull roll axis, the stems being disposed in a uniform array on and formed integrally with the substrate sheet, and the stems being generally uniform in shape and height and each stem having a constant cross-sectional diameter along its entire height;
• and
• a repositionable pressure sensitive adhesive carried on the first side of the substrate sheet of the pull roll cover to releasably adhere the pull roll cover to the cylindrical outer surface of the pull roll for replacement or realignment, the repositionable pressure-sensitive adhesive being a low tack adhesive that retains sufficient tack to be re-adhered once repositioned on the cylindrical outer surface of the pull roll and that leaves no appreciable residue once removed therefrom.

A pull roll assembly for traversing a linearly advancing web, the pull roll assembly comprising:

• a pull roll having an axis and a cylindrical outer surface;
• a pull roll cover helically wrapped about at least that portion of the cylindrical outer surface of the pull roll that engages an advancing web, the pull roll cover being defined by a substrate sheet having first and second sides, the second side having desired characteristics for frictional engagement with the advancing web;
• and
• a repositionable pressure sensitive adhesive on the first side of the substrate sheet of the pull roll cover to releasably adhere the pull roll cover to the cylindrical outer surface of the pull roll for replacement or realignment, the repositionable pressure-sensitive adhesive being a low tack adhesive that retains sufficient tack to be re-adhered once repositioned on the cylindrical outer surface of the pull roll and that leaves no appreciable residue once removed therefrom.

A pull roll assembly for traversing an advancing woven textile web having a weave defined by crossed fibers, the pull roll assembly comprising:

• a pull roll having an axis of rotation and a cylindrical outer surface;
• a pull roll cover defined by a longitudinal strip of cover material that is helically wrapped, edge to edge, about at least that portion of the cylindrical outer surface which is presented for engagement with the advancing woven textile web, the pull roll cover being defined by a substrate sheet having first and second sides, the second side being defined by the outer ends of a plurality of cylindrically shaped stems projecfing radially outwardly relative to the pull roll axis, the stems being disposed in a uniform array on and formed integrally with the substrate sheet, the stems being identical in shape and height and each stem having a constant cross-sectional diameter along its entire height which is sized so that the outer ends of the stems engage the weave of the advancing textile web by penetrating the interstices between crossed fibers thereof, whereby the constant diameters of the identically shaped stems present a uniform and unchanging engagement surface to the woven textile web as the stems wear down over time;
• and
• a repositionable pressure-sensitive adhesive carried on the first side of the substrate sheet of the cover material to releasably adhere the cover material to the cylindrical outer surface of the pull roll for replacement or realignment, the repositionable pressure sensitive adhesive being a low tack adhesive that retains sufficient tack to be re-adhered once positioned on the cylindrical outer surface of the pull roll and leaves no appreciable residue once removed therefrom.