| 摘要 |
The system (20) has a trapezoidal shaped intended flexible sheet movable between a jam state and a functional state in an extension direction. Two guide rails (30) are reciprocally arranged in the flexible sheet. An extension profile (40) incorporates a covering surface that is directed in the jam state when the covering surface is in the extension direction. The covering surface covers an exit passage slot of the flexible sheet. Side sections (46b) of the covering surface enter into a receiving space enclosed by a main segment (42) when length of the extension profile is reduced. |
