think this is it

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Note added at 42 mins (2020-08-23 04:52:15 GMT)
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and maybe with "finish"

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Note added at 44 mins (2020-08-23 04:53:43 GMT)
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Explanation:
Most cans are right circular cylinders with identical and parallel round tops and bottoms with vertical sides. However, cans for small volumes or particularly-shaped contents, the top and bottom may be rounded-corner rectangles or ovals. Other contents may suit a can that is somewhat conical in shape.

Fabrication of most cans results in at least one rim—a narrow ring slightly larger than the outside diameter of the rest of the can. The flat surfaces of rimmed cans are recessed from the edge of any rim (toward the middle of the can) by about the width of the rim; the inside diameter of a rim, adjacent to this recessed surface, is slightly smaller than the inside diameter of the rest of the can.

Three-piece can construction results in top and bottom rims. In two-piece construction, one piece is a flat top and the other a deep-drawn cup-shaped piece that combines the (at least roughly) cylindrical wall and the round base. Transition between wall and base is usually gradual. Such cans have a single rim at the top. Some cans have a separate cover that slides onto the top or is hinged.

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Note added at 56 mins (2020-08-23 05:05:32 GMT)
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or "bonding"

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Note added at 56 mins (2020-08-23 05:06:09 GMT)
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a good option here

From the context you have provided and I think it could refer not the cans, but the person this text refers to: the owner of the factory, for example. And in these case "Auslauf" would make sense to mean something like "assembly line".

A translation of Auslauf is: "Möglichkeit, sich im Freien zu bewegen, zu spielen; Bewegungsfreiheit"

This looks to me like like someone is complaining to another someone about the leak in the cans and saying something like: "the flange didn't connect completely in your (assembly line) and leaked.

I am thinking more of a word related to the final process of a product in a factory (when the process ends and it is finally "free" to go to the supermarkets, or something like this).

But I think "assembly line" would work.

Anyway, I hope it helps you.

The outer bottom seams in the run-out were not completely beaded to the can body and gaps with widths of up to 0.10 mm were present.

(4) The pre-form is then flanged, beaded and coated before final inspection.
https://silgancontainers.com/products/cans/

Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials.[1]
Hems are commonly used to reinforce an edge, hide burrs and rough edges, and improve appearance.[1]
Seams are commonly used in the food industry on canned goods, on amusement park cars, in metal roofing (with a roof seamer), and in the automotive industry.
https://en.wikipedia.org/wiki/Hemming_and_seaming

The first operation seam is critical to avoid problems like wrinkles (tightness issues) and leaks. The shape of the seam is determined by the shape of the first operation roll, the second operation roll, their relative positions and distances, lifter height, lifter pressure. Any damage or problems to the seamer or seamer tools can cause severe problems to the double seam like seam bumps, wrinkles, sharp seams, and open seams.
https://en.wikipedia.org/wiki/Can_seamer

Machine for beading cylindrical cans or can bodies
:
The description refers to the steps undergone by one can body 5 only, given that the procedure is repeated identically for each can in turn. The unbeaded can body 5 is transferred from the conveying means of the infeed station 3 to the work station 7 currently positioned alongside. At this juncture, the mandrel 9 and the support means 8 of the work station 7 will be fully spread apart, with the mandrel 9 lying at its lowest possible height and the shelf 13 at its maximum height; remembering also that the diameter of the mandrel 9 is smaller than that of the can body 5, it happens that on arrival of the work station 7 at the fixed sector, the mandrel 9 will be aligned comfortably within the compass of the can body. As the head 2 rotates, the mandrel 9 and the support means 8 draw together through the action of the cams 21 and 22, whereupon the mandrel 9 passes through the shelf 13 by way of the hole or recess 13 and enters the can body 5. The initial stretch 23 of the fixed sector 10 now engages the can body 5, which is thus urged back across the shelf 13, against the brackets 14, and into contact with the barrel 12 of the mandrel 9; once this contact is established, the barrel 12 will begin forcing the can body 5 against the fixed sector 10 and thus bringing about its deformation, which consists investing the cylindrical can wall with the impression of the profiles 28 offered by the matched force and reaction surfaces. The center shaft 11 of the mandrel 12 is neither overhung nor positively engaged during this operating step, as in conventional machines, but supported at the top end by the rollers 37, against which it registers freely and in such a way as will enable continued rotation about its own axis. Approaching the runout area, the two cams 21 and 22 cause the mandrel 9 and the support means 8 to draw apart to the point where, on arrival at the runout station 4, the can body 5 is wholly unencumbered by the mandrel 9 in the transverse direction and can be removed by the respective conveying means 4t.
https://patents.justia.com/patent/5150594

See Fig. 1:
https://worldwide.espacenet.com/patent/search/family/0111115...

Term also used for wheel rims:

The MAKRA Concentricity and Run-Out Test Machine is used in the wheel manufacturing process to simultaneously measure the radial and planar run-out of the exterior and interior wheel bead seat
https://lmcworkholding.com/products/wheel-machines/wheel-tes...