Patent ID: 7040569

Claim:
A winding tube for winding up strips, films, or sheets of thin plastic, paper or metal, made of a spiral shaped wound metal strip with adjacent strip windings that overlap at least partially, the metal strip having a corrugated profile in cross-section including outer and inner corrugation heads, and the tube made of the wound metal strip having an outer wall and an inner wall, wherein the outer corrugation heads ( 1 ) of the metal strip, which are located on the outer wall of the tube following winding of the metal strip to make the tube, are wider than the inner corrugation heads ( 2 ), which are located on the inner wall of the tube following winding of the metal strip to make the tube; and wherein adjacent corrugations of the profile substantially abut in sections of their outer head regions ( 1 ) located on the outer wall of the tube, and the inner head regions ( 2 ) of the adjacent corrugations located on the inner wall of the tube are completely distanced from each other.