| 摘要 |
The cut edge of a roller blind that is fixed on a winding shaft produces an abrupt change in diameter. The radius of curvature of the wound blind abruptly changes at this location. The resulting bend in the roller blind predominantly stabilizes over time on the inner layers of the wound blind. When the roller blind is pulled out, the bend becomes visible in the form of a strip. In order to prevent this bend from forming, the outer surface of the roller blind transitions into a ramp surface in the winding shaft at the fixing point. The ramp surface can be produced by means of grinding, a filler body or use of a correspondingly stepped winding shaft.
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