Cores formed by at least three segments having obiformal curved surfaces

Core forwinding self-adhesively coated materials in web form, having an outer contour formed by at least three segments substantially in the form of portions of a circle, with

• a) the segments being arranged convexly with respect to the axis of the core,
• b) the surfaces of the segments having normals aligned orthogonally with respect to the axis of the core,
• c) adjacent segments meeting each other and forming edges where they meet, said edges being aligned parallel with respect to the axis of the core and the core having a recess on the inside, so that the core together with self-adhesively coated materials wound thereon can be fitted on cylindrical core holders.

A wound form of adhesive tape, wherein an adhesive tape is wound on a core having an outer contour formed by at least three segments substantially in the form of portions of a circle, with

• a) the segments being arranged convexly with respect to the axis of the core,
• b) the surfaces of the segments having normals aligned orthogonally with respect to the axis of the core,
• c) adjacent segments meeting each other at edges, said edges being aligned parallel with respect to the axis of the core and the core having a recess on the inside, so that the core together with self-adhesively coated materials wound thereon can be fitted on cylindrical core holders.

A wound form of adhesive tape, wherein an adhesive tape is wound on a core having an outer contour formed by three to seven segments of the same shape in the form of portions of a circle, which are arranged symmetrically around the axis of the core, with

• a) the segments being arranged convexly with respect to the axis of the core,
• b) the surfaces of the segments having normals aligned substantially orthogonally with respect to the axis of the core,
• c) adjacent segments meeting each other at edges, said edges being aligned parallel with respect to the axis of the core and the core having a recess on the inside, so that the core together with self-adhesively coated materials wound thereon can be fitted on cylindrical core holders.