PLASTIC CONTAINER WITH SNAP-FIT CLOSURE Russian patent published in 2005 - IPC

FIELD: packing equipment, particularly pressure-molded containers.

SUBSTANCE: container has snap-fit closure and snap-fit member located on upper container edge and adapted to connect closure. Closure has peripheral snap-fit edge and peripheral groove for upper container edge receiving. Closure has area brought into tight contact with upper container edge and provided with peripheral sealing structure arranged inside the groove. Sealing structure is formed of material having higher elasticity in comparison with container and/or closure material. Sealing structure is made separately from snap-fit edge and is formed as a single whole by pressure molding on closure or container. Outer side of upper container are has peripheral beam facing downwards and connected to upper container edge at height of sealing structure location or at distance equal to several container wall thicknesses. Sealing structure may have two sealing parts located at different angles to main container axis, wherein container and/or closure have areas adapted to provide tight contact with sealing parts. Container and sealing structure may be provided with fin-like extensions which are brought into contact one to another when closure is put on container. Outer side of the groove at sealing structure height receiving sealing structure of the lid contacts with outer container surface from sides thereof near upper container edge.

EFFECT: increased reliability, leak protection, particularly when container is used to store volatile and other hazardous substances such as oil, for instance mineral oil.

19 cl, 5 dwg