Patent ID: 6702133
Filing Date: 2004-03-09
Classification: B65D,Y10S

Abstract:
A retortable container system, comprising:a) a container having a neck portion forming an inner wall tapering radially outwardly as it extends upwardly so as to be inclined at an angle (A2) to the axial direction, said wall having an upper portion having a diameter (d2); b) a closure, said closure comprising (i) a generally circular plastic top portion having upper and lower surfaces, and (ii) a generally cylindrical plastic skirt portion extending downwardly from said top portion, said skirt portion having means for securing said closure to said container neck portion; c) a seal for sealing said closure to said container, said seal comprising (i) a circumferentially extending ridge integrally formed in said plastic top portion so as to project downwardly from said lower surface thereof, said ridge forming a first structural wall extending downwardly from said lower surface of said plastic top portion and tapering radially inwardly as it extends downwardly so as to be inclined to the axial direction, and (ii) a flexible liner bonded to said lower surface of said plastic top portion for compression by said container neck inner wall, a first portion of said flexible liner covering at least said first structural wall so as to form a downwardly extending liner wall having an outer diameter (D2) and tapering radially inwardly as it extends downwardly so as to be inclined at an angle (A1) to the axial direction, prior to compression of said liner by said container neck said liner wall angle (A1) being sufficiently greater than said neck inner wall angle (A2) and said liner wall outer diameter (D2) being sufficiently greater than said diameter (d2) of said container neck wall so that said container neck wall initially contacts said liner wall at said uppermost portion thereof and compression of said liner wall as said closure is tightened onto said container proceeds progressively downward.