Metal deforming – With cutting – By composite tool
Patent
1991-03-18
1992-03-31
Crane, Daniel C.
Metal deforming
With cutting
By composite tool
72294, 72319, 72335, 83214, 83682, 83649, B21D 500, B21D 2824
Patent
active
050996711
ABSTRACT:
Apparatus is provided for forming strips of sheet metal into supports or hangers for ducts and the like. The apparatus comprises a reel for holding a coil of sheet metal for being formed into strips, a strip feeder for extracting lengths of sheet metal from a coil of sheet metal held in the reel, and a combination brake, punch and shear mounted on the reel for causing a 90 degree bend in a portion of the strip near the end to be sheared off, for punching at least one hole in, and for shearing, each of the extracted lengths of sheet metal from the coil, the combination brake, punch and shear being configured for causing the bending, punching and shearing with a single operational stroke, a hole being punched in the extracted length of sheet metal between the bend and shear lines before the bend is made and before the strip is sheared form the coil of sheet metal. The strip feeder comprises a pair of rollers between which sheet metal from the coil is passed so as to be advanced from the coil in response to rotation of the rollers in a strip advancing direction, and including a manual crank for causing the rotation of the rollers in a sheet metal advancing direction, rotation of the rollers being calibrated so that a given rotation of the rollers causes the extraction of a known length of sheet metal from the coil.
REFERENCES:
patent: 494535 (1893-03-01), Vanstone
patent: 1379005 (1921-05-01), Eligh
patent: 1423586 (1922-07-01), Throne
patent: 1526518 (1925-02-01), Wentworth
patent: 1529387 (1925-03-01), Anderson
patent: 1573810 (1926-02-01), Cunningham
patent: 2210062 (1940-08-01), Campbell
patent: 2460281 (1947-02-01), Garberding
patent: 3248988 (1966-05-01), Janczy
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