Patent ID: 6190583
Filing Date: 2001-02-20
Classification: G02B

Abstract:
A method of making a slotted rod for an optical cable, said method comprising the steps of:introducing into an extruder a tension member, said extruder having a head portion with a space into which a molten resin is injected in a state where said tension member penetrates therethrough, and providing a rotatable die at a resin extruding orifice of said head portion; androtating said rotatable die, during when the resin covering said tension member is being extruded from said head portion, about a moving direction of said tension member such that said die alternately reverses the rotational direction thereof for every predetermined reversing pitch of said tension member and twisting said tension member alternately in rotational directions opposite to the rotational directions of said rotatable die in synchronization with the rotation of said rotatable die.