Abstract A composite container with a light weight and relatively thin plastic body portion having an open neck portion around which is fixed a separate and rigid annular ring member with threads or other fastening means for cooperative attachment of a closure member thereto; the container body portion being initially a plastic preform with an outward flange rim at the open end and the annular ring member being assembled with the preform to a position around the neck portion and in engagement with the flange rim; and with the preform then reformed with the body wall expanded beneath the adjacent end of the ring member to trap the same in engagement with the flange rim. There are conventional plastic glass jars and bottles with relatively thick walls and resultantly of relatively increased weight to provide a threaded finish of sufficient strength to properly secure and seal a threaded cap thereon. Also, there are containers of various types having threaded members of various types separately secured thereto. In some of these types, as where plastic materials are employed, there is a mold formation of the parts with a welding of the materials of the container and threaded members; in others, there is mechanical interlocking between the container and the threaded member.
A composite container assembly comprising a container portion and an annular relatively rigid ring portion, said container portion being formed from a thin-walled plastics material with insufficient rigidity to be formed with properly functioning cap attaching formations for a closure cap, said container portion comprising a body section, a neck section integrally formed on the upper end of said body section, and a flange section integrally formed on the upper end of said neck section, said body section immediately below said neck section having a shoulder extending substantially radially outwardly of said neck section, the outer diameter of said ring portion being less than the outer diameter of said shoulder of said body section, said ring portion disposed circumferentially about said neck section with the lower end of said ring portion vertically abutting said shoulder, said ring section having external cap attaching formations extending outwardly thereof, said flange section immediately overlying and positioned against the upper end of said ring portion, the outer diameter of said flange section being substantially less than the radially outward extension of said external cap attaching formations, said flange section being sufficiently flexible to provide a seal between an applied closure cap and the interior of said container portion, indentations formed in the inner surface of said ring portion, and portions of said neck section indented into said indentations to lock said ring portion against rotation relative to said neck section.
Claim 2
Dependent Claim
236 words
A composite container assembly comprising a container portion and an annular relatively rigid ring portion, said container portion being formed from a thin-walled plastics material with insufficient rigidity to be formed with properly functioning cap attaching formations for a closure cap, said container portion comprising a body section, a neck section integrally formed on the upper end of said body section, and a flange section integrally formed on the upper end of said neck section, said body section immediately below said neck section having a shoulder extending substantially radially outwardly of said neck section, the outer diameter of said ring portion being less than the outer diameter of said shoulder of said body section, said ring portion disposed circumferentially about said neck section with the lower end of said ring portion vertically abutting said shoulder, said ring section having external cap attaching formations extending outwardly thereof, said flange section immediately overlying and positioned against the upper end of said ring portion, the outer diameter of said flange section being substantially less than the radially outward extension of said external cap attaching formations, said flange section being sufficiently flexible to provide a seal between an applied closure cap and the interior of said container portion, indentations formed in the inner surface of said ring portion, and portions of said neck section indented into said indentations to lock said ring portion against rotation relative to said neck section.