METHOD OF MAKING LOCKING MEMBER FOR OPENING METALLIC PACKAGE, LOCKING MEMBER FOR METALLIC PACKAGE, PACKAGE WITH LOCKING MEMBER AND PACKAGE FOR DRINKS Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method comprises steps of forming a round thin blank of a sheet metal with a concave zone, making spherical and cylindrical portions with use of that concave zone, performing a cutout at a level of the spherical portion for making an opening, expanding a peripheral part of the cylindrical portion and crimping a removable cover on the opening for making a crimping seam. EFFECT: enhanced reliability. 18 cl, 19 dwg