Wireworking – Loop forming
Patent
1979-03-29
1980-10-21
Larson, Lowell A.
Wireworking
Loop forming
140 927, 140104, 11 1R, B21F 3502
Patent
active
042288304
ABSTRACT:
A device for forming a hanging eye in a wire binder, having a plurality of loops extending through a stack of sheets adjacent one edge of the sheets with the recess formed in the edge, comprising, a housing, a pair of tongs pivotally mounted in the housing, forming a jaw for grasping one of the loops in the binder, and a first driver for closing and opening the tongs to grasp and release the loop. The frame is movable to bring the jaw into the vicinity of the recess with the first driver being energized to grasp a loop adjacent the recess in the jaw. A second driver is connected to the tongs for rotating them about 90.degree. to rotate the grasped loop adjacent the recess. The first driver is then energized to open the jaws and the second driver is energized to remove the jaws from the vicinity of the recess. A hanging eye is thus formed from the loop which has been rotated through 90.degree. in a continuous operation. The invention is also drawn to a method for producing a hanging eye in a continuous wire binder.
REFERENCES:
patent: 1906449 (1933-05-01), Dedrick et al.
patent: 2161689 (1939-06-01), Strandberg
patent: 3342223 (1967-09-01), Hall et al.
patent: 3685062 (1972-08-01), Pearson
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