Clamping head for winding tubes

摘要

A clamping head for engaging the interior cavity of a hollow tube, or core, used to wind a traveling web, such as paper produced by a papermaking machine, comprises a head shank in the shape of a truncated hexahedral pyramid having a clamping surface on each side of the hexahedron. A corresponding number of clamping pieces have contact surfaces which engage the clamping surfaces. The clamping and contact surfaces are contoured with concave, convex and straight pitches in the circumferential direction relative to the shank such that their contact is substantially linear. Expansion of the clamping pieces to engage the core is provided by a combination of pivotal and sliding movement of the contact surfaces on the clamping surfaces.