• (v. t.) To wind too tightly, as a spring, or too far, as a hoisting rope on a drum.
O`ver·wind' transitive verb To wind too tightly, as a spring, or too far, as a hoisting rope on a drum. 
Steel strip that comes off of the top of the coil on the entry reel into the side trimmer.
to wind beyond the proper limit; wind too far: He must have overwound his watch.