The invention relates to a winding shaft for a roller blind device with a winding tube and a torsional tensioning device that, with a first end, is coupled to the winding tube in a manner that enables it to rotate in relation thereto. The reordered text document is then presented to the user, thus requiring the user to read each section of the text document in a stand-alone manner. A closing element is formed in a U-shaped pattern with two legs and meshes with each recess of the holding elements.