B - Operations – Transporting – 25 – G
Patent
B - Operations, Transporting
25
G
26/29, 24/76
B25G 3/28 (2006.01) B65D 63/06 (2006.01) B65D 63/14 (2006.01)
Patent
CA 1088732
ABSTRACT OF THE DISCLOSURE A gritless seal, a method for making the seal, and a method for forming a joint with the seal between over- lapped ligature segments is provided. In the preferred embodiment, the seal has a body which includes a generally rectangular-shaped central portion and a pair of generally rectangular-shaped legs each connected to the central portion by a longitudinally extending bend. The seal has an inner gripping layer for lying in surface contact with the over- lapping ligature segments and has an outer, ductile layer of material adjacent the inner layer. The inner gripping layer is brittle and has a hardness greater than that of the outer, ductile layer. In forming the joint, the seal is disposed about the overlapped ligature segments and is folded, squeezed, and/or crimped about the segments under pressure sufficient to deform the outer, ductile layer and produce fracture cracks in the inner gripping layer which present sharp edges to engage and hold the surfaces of the overlapping ligature segments and whereby the inner grip- ping layer is maintained against the surfaces of the over- lapping ligature segments by the deformed, outer, ductile layer. The seal is made from sheet steel stock by coating the outer surface with a non-ferrous masking material and then submerging the seal in a bath or sodium cyanide, sodium chloride, and graphite at 1500°F for 15 minutes after which the seal is quenched in oil.
311400
Beach John R.
Haraden William J.
Sauer L. Peter
Fetherstonhaugh & Co.
Signode Corporation
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