STOPPED FOR BOTTLES WITH CHAMPAGNE OR OTHER CARBONATED DRINKS Russian patent published in 1997 - IPC

FIELD: food industry; polymeric stoppers. SUBSTANCE: outer ring projections of stopper are grouped in two cascades. Ratio of distance "a" from flange to nearest projection of first cascade to distance "b" between projections of first and second cascades nearest to flange is chosen basing on condition . Rigidly ribs should be preferable made longitudinal with tapering profile in meridional plane and thinning from top of stopper to its bottom portion. Ratio of rigidly rib thickness δ to stopper wall thickness d_o is chosen condition . Ratio of rigidly rib height "h" to stopper length "l" complies with condition . Number of longitudinal rigidly ribs should be chosen to provide 2 < n ≅ 6r. In some cases rigidly ribs can be made cross, arranged symmetrically relative to outer rings. EFFECT: improved reliability in handling, provision of tightness of carbonated drink bottles at gauge pressure up to 1.5 MPa. 5 cl, 5 dwg