| 摘要 |
1. Process for slipping a length of concertinaed tubular sheathing, initially folded flat, onto a load from the top, in which the two parts of each sheathing concertina are parted by parting means ; the sheathing is opened positively ; the open sheathing is drawn downwards so as to surround the load ; the sheath folded flat is cut transversely to obtain a length of sheathing corresponding to the height of the load ; and the sheathing is welded transversely in the immediate vicinity of the transverse cut in order to cover the upper horizontal face of the load, characterized in that partial transverse welding of the sheathing (1) is carried out in such a way that the two parts (5) of each concertina (3) are not fixed to one another, at least from their outer free edge (7), in order to provide, from this outer free edge, continuous access (13) to the interior of the concertina (3), including in line with the transverse weld, and the two parts of each concertina (3) are parted permanently immediately before the sheathing is opened. |
