Patent ID: 8075941

Claim:
A method in a coating line, in which a fibre is uncoiled from a fibre start by means of a pulling device to an extrusion head that comprises a die part and a torpedo part, by means of which on the surface of a primary coated fibre there is arranged a buffer layer which is in tight contact with the primary coated fibre, and in which method the tightly coated fibre is cooled downstream of the extrusion head in a predetermined manner, the method comprising the following steps: determining a target value for line tension by means of the correlation between a line tension and a force required for stripping the buffer layer; measuring the line tension between the extrusion head and the pulling device; comparing the obtained measurement data with the target value to be obtained by means of the correlation between the line tension and the force required for stripping the buffer layer; and adjusting the position of the die part and/or the torpedo part of the extrusion head in the axial direction of the fibre such that the measurement value to be obtained from the line tension measurement attains the target value.