Method and apparatus for toughening metal strap buckles

Details Method and apparatus for toughening metal strap buckles Method and apparatus for toughening metal strap buckles

A - Human Necessities

44

B

A44B 11/00 (2006.01) B65D 63/16 (2006.01)

Patent

CA 2303693

The invention relates to a metal tie buckle made from a single piece of rounded wire that has been bent into a predetermined configuration, wherein two pairs of strap engaging arms that are essentially parallel to one another are provided for securing the buckle to the strap. The buckle has been treated with a hardening process, such as carburizing, carbonitriding, nitriding and induction hardening, that strengthens and toughens the buckle. This helps to keep the arms parallel and prevents the propensity of the buckle to achieve plastic deformation, which in turn helps to prevent the strap from being pinched, or otherwise causing uneven stress on the strap, which could result in premature failure of the strap.

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