Apparatus and method of processing a light waveguide product

A process for treating a product having a strand element of at least one waveguide loosely received in a sheath extruded thereon, said process including providing first and second treating chambers, each treating chamber having an inlet, an outlet disposed on a line, at least two storage disks aligned one after another along said line and mounted for rotation on axes spaced along said line in the chamber and means for driving at least one disk of each chamber so that a precise length allocation between the light waveguide and sheath is obtained, said first chamber being positioned with its inlet receiving the product as it leaves the last extruder, said second chamber being arranged with its inlet positioned to receive the product leaving the outlet of the first chamber;

• providing a coolant in the first chamber and a second coolant in the second chamber;
• maintaining the coolants at the desired temperatures for each chamber;
• passing the product sequentially through the first chamber and into the second chamber then looping the product around at least one storage disk in the second chamber before passing it out of the outlet of the second chamber, positively rotating at least one of the disks in each chamber, and then collecting the treated product by winding the product onto a drum.