Abstract: A clip is disclosed for connecting two adjacent loops of segment bent helical barbed tape in close proximity to one another at a nesting point of two contiguous folds to form a concertina antipersonnel barrier. The clip includes first and second opposed flaps. The first flap includes an elongated semi-circular aperture extended therethrough and dimensioned to surround the contiguous folds in their entirety such that the clip reinforces the areas of stress concentration that lie proximate the contiguous folds. The second flap includes an identical elongated semi-circular aperture extended therethrough which functions to promote stacking of adjacent coils of helical barbed tape during storage. The clip further includes a unitarily formed locking mechanism defined by an extruded cylindrical sleeve disposed on the first opposed flap and a circular aperture extended through the second opposed flap.

Abstract: A new and improved apparatus and process for continuously forming an intrusion detection barrier coil from a strip of barbed metal tape is provided. The apparatus includes a series of rollers for deforming the central portion of the barbed metal tape into a generally U-shaped configuration, as well as a dispenser for depositing an elastomeric filler material into the U-shaped tape, and a mechanism for feeding a continuous length of vibration-sensitive electrical cable in the elongated, U-shaped tape. Thereafter, the composite assembly of U-shaped barbed tape, elastomeric and electrical cable is continuously forced through a set of opposed rollers so as to roll form the U-shaped section into a generally circular, closed configuration. The composite structure is then bent by a series of offset rollers in a generally horizontal plane to form a helical coil of intrusion detection barbed tape.