Container and closure therefor

Claim 1

A container comprising a container body and a closure both being of plastics material, the body having an annular wall defining an opening and a lip around the opening, the lip having a sealing region surrounding the opening and a radially outwardly directed shoulder spaced axially along the wall from the sealing region, the shoulder having an abutment surface facing radially outwardly and axially away from the lip, and the closure having a cover portion surrounded by a U-shaped rim, the rim comprising a radially inner axial wall, a spaced radially outer axial wall and a base interconnecting said walls which define between them an axially facing recess of the rim for insertion of the lip between the walls, the rim also including a sealing region at the junction of the inner wall and base, one sealing region being in compressively loaded and tangential engagement with the other region to provide substantially a point contact between the regions in a cross-section along the axis and along a single annular line when the lip is received within the rim, and the outer wall incorporating a radially inwardly projecting bead to coact with the shoulder to urge the lip towards the base of the rim and to urge the sealing regions into said engagement, the outer wall being resiliently flexible outwardly for snap engagement around and release from the shoulder.