Container closure assembly

Claim 2

A closure forming arrangement for an open end of a tubular container which comprises a ring member of semi-rigid plastic material having a rim forming section with peripheral surfaces in planes generally normal to each other and having an outboard peripheral recess opening in a direction generally normal to one surface of said rim section and extending generally parallel to the other surface which outboard recess is configured to receive a marginal portion of the container wall at the open end thereof with means therein to grip said wall portion when the latter is seated in said recess, and said ring member having a recess inboard of said peripheral recess which opens in a direction to receive therein marginal portions of a closure forming disc member of paperboard or similar material with inwardly spaced means for holding the disc against movement inwardly of the container, said outboard recess extending generally parallel with an outboard peripheral surface of said rim section and between outboard and inboard wall sections which extend generally parallel to each other and normal to a connecting wall section extending between corresponding ends of said outboard and inboard wall sections, said inboard recess being defined by the inboard surface of said inboard wall section, an overhanging extension of said connecting wall section and a wall section spaced from said overhanging extension of said wall section and extending inwardly of said inboard wall section, said wall section which extends inwardly of said inboard wall section having an area of reduced thickness intermediate its innermost and outermost edges which increases its flexibility and cooperates with the overhanging extension of said connecting wall section in clamping said closure forming disc in position in said recess.

Claim 3

A closure forming assembly for a tubular container body having a band formation on the marginal edge of the sidewall which presents, on the outboard face thereof, an abutment forming edge facing in the axial direction away from the end of the container, said closure forming assembly comprising a ring member of semi-rigid, continuous plastic material which has a peripheral outer wall section, a cooperating inner wall section spaced radially inwardly thereof and a connecting wall section in a plane normal to the plane of said outer and inner wall sections thereby providing a radially outer annular groove opening in an axial direction inwardly of said connecting wall section for receiving therein a marginal portion of said container sidewall and said band formation so as to secure said ring member on said container body in end closure forming relation, and said ring member having a radially inner annular groove which opens in an axial direction outwardly relative to the inwardly opening direction of said outer annular groove and inwardly in a radial direction for receiving therein marginal portions of a closure member which is in the form of a disc, said connecting wall section extending radially inwardly at its inboard margins so as to form a narrow flange which overlies outboard portions of said inner annular groove, an innermost axially directed wall constituting a flange formation which is radially spaced inwardly of said inner wall section, a flange formation extending in a radial plane and connecting the innermost edges of said axially directed innermost flange formation and said inner wall section, which connecting flange formation has an area of reduced thickness so as to form a flexing area, said innermost flange formation having a bead formation at its outermost edge with the terminal edge thereof in a radial plane spaced axially inwardly of the inner face of the portion of said connecting wall section which overlies said innermost groove a distance slightly less than the thickness of said closure disc so as to cooperate with the inwardly extending margin of said connecting wall section in clamping the marginal portions of said disc, and said bead formation being spaced inwardly of the inner edge of said connecting wall section a distance sufficient to permit the margins of said closure disc to be depressed into said innermost groove when seating said disc therein or removing said disc therefrom.

Claim 4

A closure forming assembly for a tubular container body having a band formation on the marginal edge of the sidewall which presents, on the outboard face thereof, an abutment forming edge facing in the axial direction away from the end of the container, said closure forming assembly comprising a ring member of semi-rigid, continuous plastic material which has a peripheral outer wall section, a cooperating inner wall section spaced radially inwardly thereof and a connecting wall section in a plane normal to the plane of said outer and inner wall sections thereby providing a radially outer annular groove opening in an axial direction inwardly of said connecting wall section for receiving therein a marginal portion of said container sidewall and said band formation so as to secure said ring member on said container body in end closure forming relation, and said ring member having a radially inner annular groove which opens in an axial direction outwardly relative to the inwardly opening direction of said outer annular groove and inwardly in a radial direction for receiving therein marginal portions of a closure member which is in the form of a disc, said connecting wall section extending radially inwardly at its inboard margins so as to form a narrow flange which overlies outboard portions of said inner annular groove, an innermost axially directed wall constituting a flange formation which is radially spaced inwardly of said inner wall section, a flange formation extending in a radial plane and connecting the innermost edges of said axially directed innermost flange formation and said inner wall section, which connecting flange formation has an area of reduced thickness so as to form a flexing area, said innermost flange formation having a bead formation at its outermost edge with the terminal edge thereof in a radial plane spaced axially inwardly of the inner face of the portion of said connecting wall section which overlies said innermost groove a distance slightly less than the thickness of said closure disc so as to cooperate with the inwardly extending margin of said connecting wall section in clamping the marginal portions of said disc, and said bead formation being spaced inwardly of the inner edge of said connecting wall section a distance sufficient to permit the margins of said closure disc to be depressed into said innermost groove when seating said disc therein or removing said disc therefrom.