| 摘要 |
A strap for a security device has a core 12 comprising at least one elongate planar body with longitudinal flexibility which is located within an independently extensible, flexible sleeve 14 such that the core is not under tension. The sleeve preferably comprises braided yarns, possibly a metallic or synthetic material, e.g. an elastomeric or a plastics extrusion, alternatively it could be knitted. The planar body may be metallic and there may be interlinked lateral beams. The security device may have locking units at either end such that a loop can be formed, the locking unit may be an elongate slot 10 at one end of the core and a pin 8 for locating in the slot. The body may have spaced perforations (36 Fig 3) for reducing weight. The core may also have lateral ribs (40 Fig 5). As the core is not under tension, it is more difficult to cut and substantially inhibits, if not prevents, cutting of the sleeve. |
