Strap crimp and crimping tool

Details Strap crimp and crimping tool Strap crimp and crimping tool

1991-11-18

1993-07-13

Larson, Lowell A.

Wireworking

Seal applying or band fastening

By device having cutting edge

140 932, B21F 902

Patent

active

052264610

ABSTRACT:
A banding strap for holding together the parts of a heat exchanger core during a brazing operation is crimped at its overlapping ends by forming two longitudinally spaced pairs of tabs, each pair being on opposite side edges of the strap. The tabs are bent from the strap ends at an angle normal to the strap surface so that corresponding notches are formed in the strap. The crimping apparatus includes a clamp for holding one end of the strap, a knife for cutting off the strap from stock, a laminated anvil which descends onto one side the strap, and crimping blades which move around to the opposite side of the strap to push portions of the strap ends against the sharp edges of the anvil to form the tabs. A powered ram is coupled to each of the clamp, knife, anvil, and crimping elements to operate each element in proper sequence during ram motion.

REFERENCES:
patent: 2097945 (1937-11-01), Childress
patent: 3034384 (1962-05-01), Novak et al.
patent: 4298061 (1981-01-01), Hoeffken
patent: 4306511 (1981-12-01), Ashby et al.
patent: 4334703 (1982-06-01), Arthur et al.
patent: 4349949 (1982-09-01), Kritzer
patent: 4459917 (1984-07-01), Michael et al.

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