Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1994-07-06
1996-03-19
Bryant, David P.
Metal working
Method of mechanical manufacture
With testing or indicating
294211, 29509, 29521, 413 4, 413 6, 723794, B23Q 1700
Patent
active
054994381
ABSTRACT:
A pallet container (1) for liquids has a replaceable inner container (2) made of sheet metal, an outer jacket (6) made of latticework, as well as a pallet (9)in the form of a bottom tray (10), which receives the bottom (16) of the inner container. The inner container (2)is made of sheet steel, preferably constructed as a double-walled structure, and is welded together from a jacket (11), a bottom part (12) and a cover (13). For the production of the inner container, a rectangular sheet-metal blank is bent to form a pipe element, whose mating edges are welded lengthwise. The pipe element is stretched to form a jacket of rectangular cross section. Then, a peripheral bead with a V-shaped cross section in each of the two end areas of the jacket is formed at a distance from its edges, which then are cut. Then, the deep-drawn, tray-shaped bottom part with a rounded edge is superposed or joined exactly to the outer sides of one bead of the jacket and the bottom part is attached to the jacket. In the same way, the cover is attached to the jacket. The bottom part and cover are welded to the jacket. To make a smooth transition between the jacket and the bottom part, on the one hand, and jacket and cover, on the other hand, the transition areas between jacket and bottom part and jacket and cover are flared by pressurizing the inner container, which is placed in a supporting mold.
REFERENCES:
patent: 1227830 (1917-05-01), Richards
patent: 4157609 (1979-06-01), Schutz
patent: 5070717 (1991-12-01), Boyd et al.
patent: 5357667 (1994-10-01), Schutz
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