Production of threaded metal rods for making U-bolts

Details Production of threaded metal rods for making U-bolts Production of threaded metal rods for making U-bolts

1988-06-06

1989-06-06

Combs, E. Michael

72 31, 72213, B21K 174, B21D 908

Patent

active

048358053

ABSTRACT:
Elongated straight cylindrical metal rods are threaded along opposite end portions, and the cylindrical outer surface of the center portion of each rod is marked to form a visual indicator of the longitudinal center of the rod. The straight rods are successively inserted into a rod bearing machine having a mandrel with a mark indicating the center plane of the bending operation. The mid-point mark on each rod is aligned with the center plane mark on the machine, and the rod is bent to form a precision U-bolt. Preferably, the mark identifying the center of each rod extends circumferentially around the metal rod and is formed by a stripe or color contrasting ink directly on the rod or on a label attached to the rod to provide a permanent mark which does not require rotating the rod to find the mark.

REFERENCES:
patent: 4643786 (1987-02-01), Cecchi
patent: 4654912 (1987-04-01), Gray
patent: 4748707 (1988-06-01), Gray

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