Security devices
AssigneeZeal Innovation Ltd.
InventorNeil Anthony Barron
Life of this patent
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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.
Claims27
A security device comprising a flexible strap with a lock unit attached at each end, the strap having a plurality of longitudinally extending multifilament cables arranged in a substantially planar array embedded in a thermoplastic or thermosetting elastomeric material, the cross-section of the strap being linear on one side of the array and having indentations on the other side of the array, the indentations extending along the strap between the cables;
- wherein the cables have a coating of primer.
A security device comprising a flexible strap with a lock unit attached at each end, the strap having a plurality of longitudinally extending multifilament cables arranged in a substantially planar array embedded in a thermoplastic or thermosetting elastomeric material, the cross-section of the strap having indentations on both sides of the array, the indentations extending along the strap between the cables;
- wherein the cables have a coating of primer.
A method of making a security device wherein a plurality of multifilament cables coated with a primer and arranged in a planar array extending in a common longitudinal direction are drawn through a die with a mass of heated thermoplastic or thermosetting elastomeric material, which die has a cross-section that forms longitudinal indents on one side of the array between the multifilament cables, the elastomeric material then being cooled with the multifilament cables embedded therein to form a strap in which the primer enhances a bond between the cables and the elastomeric material;
- and attaching complementary lock units to the strap ends.
A method of making a security device wherein a plurality of multifilament coated with primer and arranged in a planar array extending in a common longitudinal are drawn through a die with a mass of heated thermoplastic or thermosetting elastomeric material, which die has a cross-section that forms longitudinal indents on one side of the array between the multifilament cables, the elastomeric material then being cooled with the multifilament cables embedded therein to form a strap in which the primer enhances a bond between the cables and the elastomeric material;
- and attaching complementary lock units to the strap ends, the method including the preparatory step of coating the surfaces of the cables with primer while ensuring that some of the surfaces of the cable filaments are free of primer.
A method of making a security device wherein a plurality of multifilament coated with primer and arranged in a planar array extending in a common longitudinal are drawn through a die with a mass of heated thermoplastic or thermosetting elastomeric material, which die has a cross-section that forms longitudinal indents in the elastomeric material on both sides of the array between the multifilament cables, the elastomeric material then being cooled with the multifilament cables embedded therein to form a strap in which the primer enhances a bond between the cables and the material;
- and attaching complementary lock units to the strap ends.
Dependencies are inferred from the claim text.