SEALING DEVICE WITH OPENING INDICATOR Russian patent published in 2014 - IPC B65D39/00 B65D55/02 

FIELD: packing industry.

SUBSTANCE: sealing device includes at least a drain and shut-off sleeves with threaded sections. Inner surface of shut-off sleeve features an annular support, and side wall of drain sleeve has several "П"-shaped slits forming stop tabs connected to the side wall of drain sleeve at the side of threaded section and capable of shifting by container crown from the first position where stop tabs are partially inside the drain sleeve to the second position where stop tabs are partially outside of the drain sleeve. Prismatic shape of stop tabs is preferred. Sealing device can have a housing covering drain and shut-off sleeves, with perforation along the line between drain and shut-off sleeves. Perforation can be made in the form of alternating bridges and slits.

EFFECT: sealing device design makes concealing of unauthorized opening impossible and prevents shut-off sleeve twist during repeated screwing onto drain sleeve.

4 cl, 3 dwg