US Patent 6883422 Round baler binding arrangement including twine tension control

A binding arrangement and a process for the control of a binding arrangement is described that includes a binding material delivery arrangement, a cutting arrangement and a braking arrangement for the binding material, where the brake can be controlled and generates a variable braking force. To improve the binding process for harvested crop, brakes for the binding material are applied with which a binding material tension is generated or is increased to cause the binding material to be retarded during the binding process in opposition to the flow of the binding material. The brakes are controlled such that only a low binding material tension is caused at the beginning of the binding process to increase the tension to as large a value as possible during the continuing binding process and to reduce the tension upstream of the cutting arrangement again at the end of the binding process. This control is done through a control arrangement, as a function of the binding material delivery conditions, and performs at least two changes in braking force within one binding cycle.