Patent ID: 7909083

Claim:
A method of fastening a flexible sheet-like structure on a tubular winding shaft defining a longitudinal axis, said method comprising the steps of: forming first and second longitudinally-spaced apart and discrete apertures in the winding shaft only in respective opposite ends thereof so as to pass through a wall of the winding shaft and so that a width of each of the first and second apertures is greater than a thickness of the sheet-like structure, the respective opposite ends of the winding shaft being open; forming first and second angularly positionable tabs on the sheet-like structure only adjacent respective opposite sides thereof; inserting the first and second tabs of the winding shaft into the respective first and second apertures; and fixing the sheet-like structure on the winding shaft by inserting bearing bushings into the respective open ends of the winding shaft such that the bearing bushings directly engage the respective first and second tabs and fix the sheet-like structure on the winding shaft.