Patent ID: 6241138
Filing Date: 2001-06-05
Classification: D21G

Abstract:
A paper web threading apparatus for use with a papermaking machine including a plurality of rotating drums including an upstream drum, a downstream drum and a middle drum disposed therebetween, each drum including an end, the upstream drum including a sheave mounted on the end thereof, the downstream drum including a sheave mounted on the end thereof, the apparatus comprising:a transfer sheave assembly mounted on the end of the middle drum, the transfer sheave assembly comprising a first sheave attached to the middle drum that rotates with the middle drum and a second sheave that rotates freely and independently of the middle drum,at least four endless ropes including at least two upstream ropes and at least two downstream ropes,the upstream ropes extending adjacent to one another and wrapping partially around the sheave of the upstream drum before wrapping partially around one of the first or second sheaves of the transfer sheave assembly before diverging from one another downstream of the transfer sheave assembly,the downstream ropes being spaced laterally divergent from one another before converging and assuming adjacent positions with respect to each other and wrapping partially around the other of the first or second sheaves of the transfer sheave assembly before wrapping partially around the sheave of the downstream drum.