FIELD: power industry.
SUBSTANCE: top contains an internal bore with an upper and lower ring protrusions and a bottom. The bottom is made of two parts: the upper is the cup and the lower is the disk, made of sheet steel. The conical projection on the cup is made by cold stamping. Binary marking of the vial is made in the form of holes located on the cup between its edges and a stamped conical projection. The cup and disk are made with different reflective ability of their surfaces.
EFFECT: invention allows to increase the coefficient of metal use in the manufacture of the top, exclude deformation of the sidewall of the boring of the lid when performing binary marking.
4 cl, 1 dwg
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