Twine wrapper for round bale forming machine

In a crop material roll forming machine having:

• (a) a frame,
• (b) means on the frame defining a roll forming region,
• (c) a dispensing mechanism pivotally mounted on the frame adjacent one end and pivotable back and forth across the machine with its opposite end movable along a predetermined arcuate path in the vicinity of a roll forming region to dispense material for wrapping a bale formed in the roll forming region, the path having its point closest to the roll forming region intermediate a rest position and a maximum stroke position,
• (d) spring means extending between a fixation point on the dispensing mechanism at one side relative to the pivotal mounting of the dispensing mechanism and a fixation point on the frame at the opposite side relative to the pivotal mounting of the dispensing mechanism and operable to urge the dispensing mechanism in a first direction away from the rest position towards the maximum stroke position while dispensing wrapping material,
• the improvement comprising:
• (e) said spring means being attached to the dispensing mechanism relative to the pivotal mounting thereof such that during the pivotal movement of the dispensing mechanism from said intermediate position to said maximum stroke position said spring means act through a moment arm of increasing length, and
• (f) control means connected to the dispensing mechanism and operable to move the dispensing mechanism in a second direction opposite to that induced by said spring means.