CONTAINER PRODUCED FROM A HELICALLY BENT SHEET METAL STRIP

摘要

A container is produced from a single-layered, helically bent sheet metal strip. In the strip's upper or lower border region a first helically running border portion of the strip is bent out via a helically running outwardly bent edge with a curved region toward the outside of the container as a protruding flange. A second helically running border portion is in the lower/upper border region. The border regions each border one another adjacently height-wise and are connected to one another in a fluid-tight manner via a continuous, helically running welded joint. The second border portion runs rectilinearly in the plane of the strip and the welded joint has a first and a second weld seam. The first and second weld seams are applied from the outside and the inside of the container, respectively, and the two weld seams are fused to each other in the weld route thereof.

主权项

1. A container (10) produced from a single-layered, helically bent sheet metal strip (20; 20.1, 20.2),
in the upper or in the lower border region of the sheet metal strip (20; 20.1, 20,2) a first helically running border portion (22) of the sheet metal strip (20; 20.1, 20.2) being bent out via a helically running outwardly bent edge (24) with a curved region (B) toward the outside (A) of the container (10) as a protruding flange, there being a second helically running border portion (26) in the lower/upper border region of the sheet metal strip (20; 20.1, 20.2), and the helically running border regions of the sheet metal strip (20; 20.1, 20.2), which each border one another in a manner adjacent in terms of height, being connected to one another in a fluid-tight manner via a continuous, helically running welded joint (40), wherein the second border portion (26) of the sheet metal strip (20; 20.1, 20.2) runs rectilinearly in the plane (E) of the sheet metal, strip (20; 20.1, 20.2), the welded joint (40) has a first and a second weld seam (42, 44), the first weld seam (42), which is preferably produced first of all, being fused from the outside (A) of the container (10) to the outer-side wall of the second border portion (26) and the wall of the curved region (B), the second weld seam (44), which is preferably produced subsequently, being fused from the inside (I) to the end surface (30) of the second border portion (26) of the sheet metal strip (20; 20.1, 20.2), and the weld routes of the first and second weld seam (42, 44) being fused to each other such that there is a homogeneous fully fused welded joint (40) running from the outside (A) to the inside (I).