A method for manufacturing a mechanical fixing device, the method comprising: providing a grooved band having mechanical fastening elements and a length in one direction of the machine, wherein the grooved band includes a plurality of laterally separated interrupted grooves that are interrupted by intact bridge regions of the band, where the interrupted grooves extend in a first direction not parallel to a transverse direction of the machine, and where for at least some of the adjacent interrupted grooves, the intact bridge regions are arranged so staggered in a direction transverse to the first direction； apply tension to the grooved belt in the machine direction； and extending the grooved band in a direction transverse to the machine by moving the grooved belt on a convex surface to provide an extended mechanical fastening band, wherein the extended mechanical fastening band comprises multiple strands of the grooved band joined together in at least some of the bridge regions intact and separated from each other between at least some of the bridge regions intact, and where at least a part of the extended surface is an air bearing； or at least a part of the convex surface is a low friction surface, and the convex surface and the grooved band do not move at the same speed in the same direction.Un método para fabricar un dispositivo de fijación mecánica, comprendiendo el método: proporcionar una banda ranurada que tiene elementos de fijación mecánica y una longitud en una dirección de la máquina, en donde la banda ranurada incluye una pluralidad de hendiduras interrumpidas lateralmente separadas que están interrumpidas por regiones puente intactas de la banda, en donde las hendiduras interrumpidas se extienden en una primera dirección no paralela a una dirección transversal de la máquina, y en donde para al menos algunas de las hendiduras interrumpidas adyacentes, las regiones puente intactas están dispuestas de forma escalonada en una dirección transversal a la prime
