Abstract: A strap for a security device has a core (12,62) within a flexible sleeve (14,64), and the sleeve is extensible independently of the core such that the core is not under tension. Because the core is not under tension, it is more difficult to cut and substantially inhibits, if not prevents, cutting of the sleeve. The core may take various forms which resist cutting in different ways. Examples are elongate, normally metallic planar bodies (12,34,38) having longitudinal flexibility but resistance to lateral flexure, and extensible springs (16,22,26). The sleeve (14,64) can also be designed to complicate any attempt to cut the strap as a whole, and may comprise multiple layers (76,78).

Abstract: A lock comprises a male element, and a female element for receiving the male element enabling aligned copular engagement. The male element has a shoulder and the female element a catch for closing behind the shoulder to hold the male element therein. The catch and a lock casing are held in the female element with the axis of the lock casing inclined, normally at a right angle, to the line of engagement of the male and female elements. The lock casing and the female element have juxtaposed faces inclined to the line of engagement of the male and female elements. At least one face on the lock casing extends from the casing outwardly from the line of engagement contiguous with an inwardly facing complementary face on the female element. In this way longitudinal forces generated by attempted separation of the engaged male and female elements are resolved by the faces into a lateral force on the female element.

Abstract: A security device has a flexible strap (26) with a lock unit (28) attached at each end. The strap (26) comprises a plurality of longitudinally extending multi-filament cables or ropes (2) arranged in a substantially planar array embedded in an elastomeric material (4). The cables or ropes (2) have a coating of primer for creating a bond with the elastomeric material (4). The primer may be restricted to the external surface of the cables or ropes (2), or some of the surfaces of the filaments may be free of primer. This facilitates relative movement of the filaments during flexure or compression of the strap (26). Moreover, an extrusion process for manufacturing the strap (26) including a priming station (12) is disclosed.