FIELD: packaging industry.
SUBSTANCE: ring area of the sheet is clamped and the circumferential section is extended. During extending of the metal sheet into the cup the base contains the material of extended and thinned circumferential section. Meanwhile the cup base has the thickness less than initial thickness of the metal sheet. The container housing and the container contain the named cup with thinned bottom.
EFFECT: container weight decrease.
24 cl, 16 dwg
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|---|---|---|---|
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