APPARATUS AND METHOD FOR APPLYING TRACTION TO AN ELONGATE ELEMENT PRODUCED BY FUSING A PREFORM OF GLASS MATERIAL AND USABLE IN A PROCESS FOR PRODUCING AN OPTICAL FIBRE

摘要

Apparatus for applying traction to an elongate cylindrical element (5) produced by fusion of an end portion (2a) of a preform (2) of glass material, in which a traction device (3) is capable of being connected to a portion (5i) of the elongate cylindrical element (5) to provide traction of the elongate cylindrical element along an axis (6). A device (4) for the rotation of the elongate cylindrical element applies a twist to the elongate cylindrical element (5) about the axis (6) simultaneously with the traction.