A method for forming a flange at an open end of a pipe comprises increasing the diameter of the open end of the pipe to form a radially-enlarged pipe wall. The search areas are determined by identifying candidate points in the low-resolution image which have low pixel absolute difference values, and the merge condition may correspond to a certain minimum distance between centers of the overlapping areas. The first deflectable body portion has a first free leg defining a first spring contact portion. The edge of the profiled groove is situated downstream with respect to the tangential component of the fiber flow. A pivot system is also provided at the base module and at the patient module to pivot the patient module relative to the base module about a horizontal axis.