Method for manufacturing tubular sleeve

Details Method for manufacturing tubular sleeve Method for manufacturing tubular sleeve

1975-05-22

1976-12-28

DiPalma, Victor A.

Pipes and tubular conduits

Combined

72379, 72384, 72394, 113116Y, 113116J, 138178, F16L 5500

Patent

active

039995763

ABSTRACT:
A tubular sleeve for use in a headlight assembly and the like and the method of manufacturing it. A strip blank is punched out of metal sheets or coiled strips. The blank has a straight edge along the lengths thereof and an arcuate edge opposite to the straight edge symmetrical relative to a plane passing through the center of the strip blank transversely thereof. The blank has opposite ends having straight edges substantially parallel to the plane. The strip is bent or rolled into a tubular split-sleeve configuration and then a marginal edge portion along the arcuate edge is flared outwardly with a varying taper. The flare is then further bent to form a flange normal to the sides of the body of the split-sleeve. A ring is formed on the flange extending generally toward the straight edge by offsetting a marginal edge portion of the flange. The edges of the split-sleeve along the split are joined to form a closed tubular sleeve.

REFERENCES:
patent: 1991642 (1935-02-01), Turnquist
patent: 2092255 (1937-09-01), Keller
patent: 3348511 (1967-10-01), Cowles

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