Patent ID: 9187917
Filing Date: 2015-11-17
Classification: B65B,E04G

Abstract:
1. A machine for tying a length of wire around one or more objects comprising a wire feed mechanism adapted to feed wire from a spool during a first phase; and to withdraw the wire during a second phase, said wire feed mechanism comprising a gripping mechanism including a pair of rollers urged together to apply a gripping force on the wire to grip the wire therebetween and drive the wire in an appropriate direction, wherein one of said rollers is connected to a roller gear and the other of said rollers is connected to a drive gear connected to a motor and said roller gear is driven by said drive gear, and wherein at least one of the rollers is rotatably mounted on a pivoting arm and said pivoting arm is rotatably mounted on a pivot axis, the pivoting arm extending between the pivot axis and the roller that is rotatably mounted to the pivoting arm, and the pivot axis extending in a direction which is perpendicular to the direction in which the pivoting arm extends, such that during said second phase, increasing tension in the wire automatically causes rotation of the pivoting arm about the pivot axis to move the rollers closer together which increases the gripping force on the wire.