Synthetic resin vessel and heat sealed lid

A vessel composed of a synthetic resin and having a top opening, a flange formed integrally with and along the peripheral edge portion of the opening, a continuous ridge protuberance formed on and along the top face of the flange, and a lid to be heat-sealed through the protuberance to close the opening and to be removed by unsealing, said vessel having a projection extending toward the outer periphery at one or both portions of the protuberance where an operation for the unsealing is started or/and terminated, and wherein the outer end of the projection on the outer periphery side is inclined so that the height of the outer end is reduced.

A vessel composed of a synthetic resin and having a top opening, a flange formed integrally with and along the peripheral edge portion of the opening, a continuous ridge protuberance formed on and along the top face of the flange, and a lid to be heat-sealed through the protuberance to close the opening and to be removed by unsealing, said vessel having a projection extending toward the outer periphery at one or both portions of the protuberance where an operation for the unsealing is started or/and terminated, and wherein the projection is formed on an extension of the flange, and the tip of the extension is inclined downardly.

A vessel for storing foodstuffs and the like comprising:

• a vessel body composed by synthetic resin and having a top opening, a flange having a substantially flat top face integral with and extending radially outwardly and continuously along the peripheral edge portion of the top opening, the flange extending radially outwardly at a constant angle relative to the sidewall of the vessel body around the entire periphery of the vessel body, an upwardly extending protuberance integral with and extending continuously along the top face of the flange to define a continuous sealing surface, the protuberance being radially spaced from the radial innermost and outermost extents of the flange and having a radially pointed portion, the flange having a radial outward extension on which extends the radially pointed portion, and the radially pointed portion having a generally V shape which is pointed in the radial outward direction;
• and a vessel lid dimensioned to overlie and rest upon the sealing surface of the flange protuberance without contacting the interior of the vessel body and being heat sealable therewith to seal closed the top opening.

A vessel for storing foodstuffs and the like comprising:

• a vessel body composed of synthetic resin and having a top opening, a flange having a substantially flat top face integral with and extending radially outwardly and continuously along the peripheral edge portion of the top opening, and an upwardly extending protuberance integral with and extending continuously along the top face of the flange to define a continuous sealing surface, the protuberance being radially spaced from the radial innermost and outermost extents of the flange and having a radially pointed portion, the radially pointed portion of the flange protuberance being pointed in the radial outward direction and tapering in height in the radial direction so that the radial outer end thereof is lesser in height than the radial inner end thereof;
• and a vessel lid dimensioned to overlie and rest upon the sealing surface of the flange protuberance and being heat sealable therewith to seal closed the top opening.

A vessel for storing foodstuffs and the like comprising:

• a vessel body composed of synthetic resin and having a top opening, a flange having a substantially flat top face integral with and extending radially outwardly and continuously along the peripheral edge portion of the top opening, and an upwardly extending protuberance integral with and extending continuously along the top face of the flange to define a continuous sealing surface, the protuberance being radially spaced from the radial innermost and outermost extents of the flange and having a radially pointed portion, the radially pointed portion of the flange protuberance being pointed in the radial outward direction, and the flange having a radial outward extension on which extends the radially pointed portion, the flange extension being inclined downwardly in the region radially outwardly of the flange protuberance;
• and a vessel lid dimensioned to overlie and rest upon the sealing surface of the flange protuberance and being heat sealable therewith to seal closed the top opening.