Plastics container assembly

Claim 2

A plastics container assembly having an upstanding side wall and a base and which consists of a tubular wall part and a base closure part fitted to a bottom end of the wall part; one of the parts having a peripheral rib and the other part having a peripheral groove within which the rib is received to provide a fluid seal, said tubular wall part being held in snap-together engagement contact with said base closure part; one of said parts having a peripheral flange which closely overlies a peripheral bottom end face of the other part, and wherein inner surfaces of the wall part and closure part provide a smooth transition from one surface to the other and the effective peripheral junction within the container between the base and the side wall presents a smoothly curved concave profile.

Claim 3

An assembly as claimed in claim 1 in which the peripheral rib is a snap engagement within the peripheral groove.

Claim 4

An assembly as claimed in claim 1 in which the wall part and closure part are permanently bonded together.

Claim 5

An assembly as claimed in claim 3 in which the bonding is by adhesive or welding.

Claim 6

An assembly as claimed in claim 3 in which permanent bonding is provided between the peripheral flange and the bottom end face which it overlies.

Claim 7

An assembly as claimed in claim 1 in which the peripheral flange is external and located on the closure part to overlie the bottom end face of the wall part.

Claim 8

An assembly as claimed in claim 1 in which the closure part comprises a bottom wall which extends substantially. over the bottom of the interior of the container and a tubular extension wall which extends downwardly from the bottom wall within and adjacent to the tubular wall part.

Claim 9

An assembly as claimed in claim 7 in which the peripheral flange is external and located on the closure part to overlie the bottom end face of the wall part and said peripheral flange is located at the bottom of the tubular extension wall of the closure part.

Claim 10

An assembly as claimed in claim 1 in which the closure part comprises a bottom wall which extends substantially over the bottom of the interior of the container and said peripheral rib and groove engage substantially in the plane of said bottom wall.

Claim 11

An assembly as claimed in claim 1 in which the tubular wall part has an internal peripheral sealing flange adjacent to the closure part and which is directed from the side wall downwardly to the closure part, said sealing flange abutting the closure part to provide a fluid seal, to provide the smooth transition between the inner surfaces of the wall part and the closure part and to form at least part of the smoothly curved concave profile at the effective junction within the container between the base and the side wall.

Claim 12

An assembly as claimed in claim 10, in which the sealing flange reduces in its thickness to taper as it recedes from the side wall to provide said smooth transition.

Claim 13

An assembly as claimed in claim 10 in which the sealing flange is flexible.

Claim 14

An assembly as claimed in claim 12 in which the sealing flange is displaced into sealing abutment with the closure part during fitting of the closure part to the tubular wall part.

Claim 15

An assembly as claimed in claim 10 in which the closure part comprises a bottom wall which extends substantially over the bottom of the interior of the container and a tubular extension wall which extends upwardly from the bottom wall within and adjacent to the tubular wall part, and wherein a peripheral recess is formed in the tubular wall part beneath, and partly defined by, the sealing flange and said upward tubular extension wall is received within said peripheral recess whereby the sealing, flange overlies that upward extension wall.

Claim 16

An assembly as claimed in claim 14 in which the peripheral recess beneath the sealing flange receives the upward tubular extension wall in substantially complementary manner.

Claim 17

An assembly as claimed in claim 1 in which the tubular wall part is substantially cylindrical.

Claim 18

An assembly as claimed in claim 1 when fitted with an openable lid for the open top of the assembly.

Claim 19

A plastics container assembly having an upstanding side wall and a base and which consists of a tubular wall part and a base closure part fitted to a bottom end of the wall part; one of said parts having a peripheral rib and the other part having a peripheral groove within which the rib is received to provide a fluid seal; one of said parts having a peripheral flange which closely overlies a peripheral bottom end face of the other part; said tubular wall part having an internal peripheral sealing flange adjacent to the closure part, said sealing flange being directed downward from the side wall to abutt the closure part so as to provide a fluid seal and a smooth transition between the inner surfaces of said wall and closure parts, said abuttment also forming at least part of a smoothly curved concave profile presented by the effective peripheral junction between the base and the sidewall within the container, and said closure part having a bottom wall extending substantially over the interior of the container bottom, a tubular extension wall extending upwardly from said bottom wall within and adjacent to the tubular wall part, said tubular wall part having a peripheral recess beneath and partly defined by the sealing flange, said upward tubular extension wall being receivable within said peripheral recess whereby the sealing flange overlies that upward extension wall.

Claim 20

A plastics container assembly having an upstanding side wall and a base and which consists of a tubular wall part and a base closure part fitted to a bottom end of the wall part; one of said parts having a peripheral rib and the other part having a peripheral groove within which the rib is received to provide a fluid seal; one of said parts having a peripheral flange which closely overlies a peripheral bottom end face of the other part; said tubular wall part having an internal peripheral sealing flange adjacent to the closure part, said sealing flange being directed downward from the side wall to abutt the closure part so as to provide a fluid seal and a smooth transition between the inner surfaces of said wall and closure parts, said abuttment also forming at least part of a smoothly curved concave profile presented by the effective peripheral junction between the base and the sidewall within the container, and said closure part having a bottom wall extending substantially over the interior of the container bottom, a tubular extension wall extending upwardly from said bottom wall within and adjacent to the tubular wall part, said tubular wall part having a peripheral recess beneath and partly defined by the sealing flange, said upward tubular extension wall being receivable within said peripheral recess whereby the sealing flange overlies that upward extension wall.

Claim 21

An assembly as claimed in claim 18 in which the peripheral recess beneath the sealing flange receives the upward tubular extension wall in a substantially complementary manner.