Closure fitment

Claim 2

A sealed package comprising, a container having an unthreaded outwardly flared neck terminating at its open end in a substantially smooth rim, and a closure cap mounted on and sealing said open end, said closure cap including a sealing fitment including an end panel adapted to engage said smooth rim and overlay said open end of the container, a downwardly depending annular skirt integrally formed on said end panel adjacent the outer periphery thereof telescoping downwardly over and encircling the outer surface of said smooth rim, a first downwardly depending annular sealing ring integrally formed on said end panel in inwardly spaced concentric relation to said skirt, said first sealing ring being dimensioned to engage and form a first seal with the inner surface of said outwardly flared neck along a first seal line spaced below said smooth rim, and a second downwardly depending annular sealing ring integrally formed on said end panel between said first sealing ring and said skirt, said second sealing ring being dimensioned to engage and form a second seal with the inner surface of said outwardly flared neck along a second seal line spaced above and radially outwardly from said first seal line, and a retaining fitment adapted to telescope onto and retain said sealing fitment on said open end, said retaining fitment and said skirt having cooperating cam surfaces thereon adapted to engage one another and compress said skirt radially inwardly beneath said smooth rim when said retaining fitment is telescoped onto said sealing fitment to thereby releasably retain said sealing fitment on said open end of said outwardly flared neck.

Claim 3

The sealed package defined in claim 1 wherein said second sealing ring comprises a shoulder integrally molded on said first sealing ring and projecting outwardly therefrom at a point spaced above the bottom edge of said first sealing ring.

Claim 4

The sealed package defined in claim 1 wherein said first and second sealings rings are molded from a resilient synthetic resin material.

Claim 5

The sealed package defined in claim 3 wherein said first and second sealing rings are dimensioned to engage and form a seal with said container neck having a maximum allowable diameter, and wherein said resilient material is capable of radial compression sufficiently to permit the sealing rings to be inserted into and seal a container having a minimum allowable diameter less than said maximum allowable diameter whereby said sealing fitment may be employed to seal containers having neck diameters varying within predetermined limits.

Claim 6

The sealed package defined in claim 1 wherein said retaining fitment comprises an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof, and a downwardly depending skirt dimensioned to telescope onto said annular skirt on said sealing fitment, said cam surfaces being formed on the radially opposed surfaces of said downwardly depending skirt portion of said retaining fitment and said annular skirt of said sealing fitment, said cam surfaces cooperating to compress said annular skirt on said sealing fitment inwardly to contact and form a seal with the outer surface of said outwardly flared neck beneath said smooth rim.

Claim 7

The sealed package defined in claim 1 further comprising a vent opening in said end panel of said sealing fitment, and vent sealing means carried on said retaining fitment, said vent sealing means being operable to seal said vent when said closure cap is installed on said container and to vent said container when said retaining fitment is removed therefrom.

Claim 8

The sealed package defined in claim 6 wherein said vent sealing means is adapted to vent said container prior to releasing said sealing fitment upon telescoping movement of said retaining fitment in a direction to release said sealing fitment.

Claim 9

A sealed package comprising, a container having an unthreaded outwardly flared neck terminating at its open end in a substantially smooth rim, and a closure cap assembly mounted on and sealing said open end, said closure cap assembly including a molded plastic sealing fitment having an end panel adapted to engage said rim and overlay said open end, a downwardly depending annular skirt integrally molded on said end panel adjacent the outer periphery thereof and dimensioned to telescope dOwnwardly over and closely encircle the outer surface of said rim, radially extending cam means on said skirt, a first downwardly depending annular sealing ring integrally molded on said end panel in inwardly spaced concentric relation to said annular skirt and dimensioned to engage and form a first seal with the inner surface of said outwardly flared neck along a first seal line spaced below said rim, and a retaining fitment adapted to telescope onto said sealing fitment when said sealing fitment is positioned on said container neck, said retainer fitment including an end panel adapted to overlay at least a portion of said end panel on said sealing fitment adjacent the outer periphery thereof, and a downwardly depending annular skirt having an inner surface dimensioned to engage said cam means and radially compress said skirt on said sealing fitment when said retaining fitment is telescoped thereon to retain said retaining fitment on said neck.

Claim 10

A sealed package comprising, a container having an unthreaded outwardly flared neck terminating at its open end in a substantially smooth rim, and a closure cap assembly mounted on and sealing said open end, said closure cap assembly including a molded plastic sealing fitment having an end panel adapted to engage said rim and overlay said open end, a downwardly depending annular skirt integrally molded on said end panel adjacent the outer periphery thereof and dimensioned to telescope dOwnwardly over and closely encircle the outer surface of said rim, radially extending cam means on said skirt, a first downwardly depending annular sealing ring integrally molded on said end panel in inwardly spaced concentric relation to said annular skirt and dimensioned to engage and form a first seal with the inner surface of said outwardly flared neck along a first seal line spaced below said rim, and a retaining fitment adapted to telescope onto said sealing fitment when said sealing fitment is positioned on said container neck, said retainer fitment including an end panel adapted to overlay at least a portion of said end panel on said sealing fitment adjacent the outer periphery thereof, and a downwardly depending annular skirt having an inner surface dimensioned to engage said cam means and radially compress said skirt on said sealing fitment when said retaining fitment is telescoped thereon to retain said retaining fitment on said neck.

Claim 11

The sealed package defined in claim 8 wherein said end panel on said retaining fitment comprises an end flange overlaying the peripheral edge portion only of said end panel on said sealing fitment, said end flange having a central opening therein, and pull tab means integrally formed with said end flange and extending into said central opening to facilitate removal of said retaining fitment.

Claim 12

The sealed package defined in claim 9 further comprising a frangible taper-proof web normally retaining said pull tab means in an inoperative position, said taper-proof web being readily broken to permit said pull tab to be manually lifted to remove said retaining fitment from said sealing fitment to thereby permit said sealing fitment to be removed from said container.

Claim 13

The sealed package defined in claim 10 wherein said pull tab comprises a disc member positioned within said central opening and having one side secured to said end flange by an integrally formed hinge member, said frangible web being integrally formed with and joining said disc member and said end flange at a point spaced from said hinge member, whereby a lifting force applied to said disc will initially break said frangible web then progressively lift said retaining fitment commencing at the side thereof adjacent said hinge.

Claim 14

The sealed package defined in claim 11 and further comprising a vent opening in said end panel of said sealing fitment, and vent plug means integrally formed on said disc in position to project into and seal said vent opening when said retaining fitment is telescoped onto said sealing fitment, said vent plug being dimensioned to be withdrawn from said vent opening upon lifting of said disc to thereby vent the interior of said container before said retaining fitment is lifted to open the container.

Claim 15

The sealed package defined in claim 8 and further comprising vent means in said end panel of said sealing fitment, and vent sealing means normally engaging and sealing said vent means when said closure cap is installed on said container, said vent sealing means being disengaged from said vent means to thereby vent said container when said retaining fitment is removed from said sealing fitment.

Claim 16

The sealed package defined in claim 13 wherein said vent means comprises a vent opening in said sealing fitment, and said vent sealing means comprises plug means integrally formed on said retaining fitment in position to project into said vent opening when said closure cap is installed on said container.

Claim 17

The sealed package defined in claim 13 wherein said vent means comprises a plurality of vent openings, and wherein said vent sealing means is adapted to disengage said vent openings successively to thereby progressively increase the rate of venting said container as said retaining fitment is progressively removed.

Claim 18

The sealed package defined in claim 8 wherein said sealing fitment further comprises a second downwardly depending annular sealing ring integrally formed on said end panel between said first annular sealing ring And said annular skirt, said second sealing ring being dimensioned to engage and form a seal with the inner surface of said container neck along a second seal line spaced above and radially outwardly from said second seal line.

Claim 19

A two-part closure cap assembly for a container having an outwardly flared unthreaded neck terminating at its open end in a substantially smooth rim overhanging a portion of the outer surface of the neck, said closure cap assembly comprising, in combination, a sealing fitment and a retaining fitment, said sealing fitment being molded from a single mass of plastic material and including an end panel adapted to overlay said open end and engage said rim to close said container, a first annular skirt depending downwardly from the peripheral edge of said second end panel, said first annular skirt being dimensioned to telescopingly receive and encircle said rim and to project downwardly therebelow, and cam means including a radially thickened portion extending around the outer surface of said first annular skirt in vertically spaced relation to said end panel and spaced below said rim when said sealing fitment is positioned on said container, said retaining fitment being adapted to be forced downwardly onto said retaining fitment to seal said container and to be lifted therefrom to open the container, said retaining fitment including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a second downwardly depending annular skirt dimensioned to closely encircle said first annular skirt and to telescope over and force said radially thickened portion inward to compress said first annular skirt inward beneath said rim when said retaining fitment is forced downward onto said sealing fitment to thereby releasably retain said closure cap assembly on the container.

Claim 20

A two-part closure cap assembly for a container having an outwardly flared unthreaded neck terminating at its open end in a substantially smooth rim overhanging a portion of the outer surface of the neck, said closure cap assembly comprising, in combination, a sealing fitment and a retaining fitment, said sealing fitment being molded from a single mass of plastic material and including an end panel adapted to overlay said open end and engage said rim to close said container, a first annular skirt depending downwardly from the peripheral edge of said second end panel, said first annular skirt being dimensioned to telescopingly receive and encircle said rim and to project downwardly therebelow, and cam means including a radially thickened portion extending around the outer surface of said first annular skirt in vertically spaced relation to said end panel and spaced below said rim when said sealing fitment is positioned on said container, said retaining fitment being adapted to be forced downwardly onto said retaining fitment to seal said container and to be lifted therefrom to open the container, said retaining fitment including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a second downwardly depending annular skirt dimensioned to closely encircle said first annular skirt and to telescope over and force said radially thickened portion inward to compress said first annular skirt inward beneath said rim when said retaining fitment is forced downward onto said sealing fitment to thereby releasably retain said closure cap assembly on the container.

Claim 21

The closure cap assembly defined in claim 17 further comprising an annular inwardly directed sealing bead formed on and extending around the inner periphery of said first annular skirt in position to project beneath said rim and form a seal with the outer surface of the container when said cap assembly is installed thereon.

Claim 22

The closure cap defined in claim 18 wherein said annular bead is positioned and dimensioned to engage said rim as said first annular skirt is being compressed to thereby cam said sealing fitment tightly onto said open end.

Claim 23

The closure cap defined in claim 17 comprising a plurality of concentric axially spaced annular sealing fins integrally molded on the inner surface of said first annular skirt in position to engage and form a seal with the outer surface of said container neck.

Claim 24

The closure cap as defined in claim 17 further comprising lifting tab means on said retaining fitment to facilitate lifting said retaining fitment off said sealing fitment to open the container, said lifting tab being eccentrically secured on said retaining fitment to initially lift one side thereof upon application of a lifting force to said tab.

Claim 25

The closure cap as defined in claim 21 further comprising an outwardly directed flange formed on said sealing fitment and projecting outwardly from said first annular skirt at the peripheral edge of said end panel, and pivot flange means formed on and extending part way only around the inner surface of said second annular skirt in substantially opposed relation to lifting tab means, said pivot flange being adapted to snap over said outwardly directed flange when said retainer is installed on said sealing fitment and to resist vertical movement of the side of said retaining fitment opposite said lifting tab upon initial lifting thereof.

Claim 26

The closure cap as defined in claim 22 wherein said end panel on said retaining fitment comprises an end flange overlaying the peripheral edge portion only of said end panel on said sealing fitment, said end flange having a central opening therein and pull tab means integrally formed with said end flange and Extending into said central opening to facilitate removal of said retaining fitment.

Claim 27

The closure cap as defined in claim 23 further comprising a frangible taper-proof web normally retaining said pull tab means in an inoperative position, said taper-proof web being readily broken to permit said pull tab to be manually lifted to remove said retaining fitment from said sealing fitment to thereby permit said sealing fitment to be removed from said container.

Claim 28

The closure cap as defined in claim 24 wherein said pull tab comprises a disc member positioned within said central opening and having one side secures to said end flange by an integrally formed hinge member, said frangible web being integrally formed with and joining said disc member and said end flange at a point spaced from said hinge member, whereby a lifting force applied to said disc will initially break said web then progressively lift said retaining fitment commencing at the side thereof adjacent said hinge.

Claim 29

The closure cap defined in claim 25 further comprising a vent opening in said end panel of said sealing fitment, and vent plug means integrally formed on said disc in position to project into and seal said vent opening when said retaining fitment is telescoped onto said sealing fitment, said vent plug being dimensioned to be withdrawn from said vent opening upon lifting of said disc to thereby vent the interior of said container before said retaining fitment is lifted to open the container.

Claim 30

The closure cap defined in claim 17 further comprising vent means in said end panel of said sealing fitment, and vent sealing means normally engaging and sealing said vent means when said closure cap is installed on said container, said vent sealing means being disengaged from said vent means to thereby vent said container when said retaining fitment is removed from said sealing fitment.

Claim 31

The closure cap defined in claim 27 wherein said vent sealing means comprises a vent opening in said sealing fitment, and plug means integrally formed on said retaining fitment in position to project into said vent opening when said closure cap is installed on said container.

Claim 32

The closure as defined in claim 28 wherein said vent means comprises a plurality of vent openings, and wherein said vent sealing means is adapted to disengage said vent openings successively to thereby progressively increase the rate of venting said container as said retaining fitment is removed.

Claim 33

The closure cap as defined in claim 17 wherein said sealing fitment further comprises a first downwardly depending annular sealing ring integrally formed on the inner surface of said end panel in concentric inwardly spaced relation to said annular skirt, said first sealing ring being dimensioned to engage and form a seal with the inner surface of said neck along a first seal line spaced below said open end.

Claim 34

The closure cap as defined in claim 30 wherein said sealing fitment further comprises a second downwardly depending annular sealing ring integrally formed on said end panel between said first sealing ring and said first annular skirt, said second sealing ring being dimensioned to engage and form a seal with the inner surface of said container neck along a second seal line spaced above and radially outwardly from said first seal line.

Claim 35

The closure cap as defined in claim 31 wherein said second sealing ring comprises a shoulder integrally molded on said first sealing ring and projecting outwardly therefrom at a point spaced above the bottom edge of said first sealing ring.

Claim 36

The closure cap defined in claim 32 wherein said first and second sealing rings are molded from a resilient synthetic resin material.

Claim 37

The closure cap defined in claim 33 wherein said first and second sealing rings are dimensioned to engage and form a seal with said container neck having a maximum allowable diameter, and wherein said resilient material is capable of radial compression sufficiently to permit the sealing rings to bE inserted into and seal a container housing a minimum allowable diameter less than said maximum allowable diameter, whereby said sealing fitment may be employed to seal container having neck diameters varying within predetermined limits.

Claim 38

A two-part closure cap assembly for a container having an outwardly flared unthreaded neck terminating at its open end in a substantially smooth rim overhanging a portion of the outer surface of the neck, said closure cap assembly comprising, in combination, a sealing fitment and a retaining fitment, said sealing fitment being molded from a single mass of plastic material and including an end panel adapted to overlay said open end and engage said rim to close said container, a first annular skirt depending downwardly from the peripheral edge of said second end panel and having an outwardly and downwardly tapering outer surface in the general configuration of a frustum of a cone, said first annular skirt being dimensioned to telescopingly receive and encircle said rim and to project downwardly therebelow, said generally conical outer surface defining radially extending cam means on said first annular skirt in vertically spaced relation to said end panel, said retaining fitment being adapted to be forced downwardly onto said sealing fitment to seal said container and to be lifted therefrom to open the container, said retaining fitment including and end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a second downwardly depending annular skirt dimensioned to closely encircle said first annular skirt and to engage said force said cam means radially inward to compress said first annular skirt inward beneath said rim when said retaining fitment is forced downward onto said sealing fitment to thereby releasably retain said closure cap assembly on the container.

Claim 39

A two-part closure cap assembly for a container having an outwardly flared unthreaded neck terminating at its open end in a substantially smooth rim overhanging a portion of the outer surface of the neck, said closure cap assembly comprising, in combination, a sealing fitment and a retaining fitment, said sealing fitment being molded from a single mass of plastic material and including an end panel adapted to overlay said open end and engage said rim to close said container, a first annular skirt depending downwardly from the peripheral edge of said second end panel and having an outwardly and downwardly tapering outer surface in the general configuration of a frustum of a cone, said first annular skirt being dimensioned to telescopingly receive and encircle said rim and to project downwardly therebelow, said generally conical outer surface defining radially extending cam means on said first annular skirt in vertically spaced relation to said end panel, said retaining fitment being adapted to be forced downwardly onto said sealing fitment to seal said container and to be lifted therefrom to open the container, said retaining fitment including and end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a second downwardly depending annular skirt dimensioned to closely encircle said first annular skirt and to engage said force said cam means radially inward to compress said first annular skirt inward beneath said rim when said retaining fitment is forced downward onto said sealing fitment to thereby releasably retain said closure cap assembly on the container.

Claim 40

The closure cap defined in claim 35 further comprising male screw threads formed on said conical outer surface, said second annular skirt being substantially cylindrical and having female screw threads formed on the inner surface thereof adapted to mate and cooperate with said male screw threads to compress said first annular skirt inward as said retaining fitment is threaded onto said sealing fitment.

Claim 41

The closure cap as defined in claim 36 further comprising restraining means on said sealing fitment adapted to be engaged to restrain said sealing fitment against rotation as said retaining fitment is threaded downward thereover.

Claim 42

The closure cap defined in claim 37 comprising at least one radially inwardly extending annular sealing fin on the inner surface of said first annular skirt in position to engage and form a seal with the outer surface of a container when the closure cap assembly is installed thereon.

Claim 43

A two-part closure cap assembly for a container having an outwardly flared unthreaded neck terminating at its open end in a substantially smooth rim overhanging a portion of the outer surface of the neck, said closure cap assembly comprising, in combination, a sealing fitment and a retaining fitment, said sealing fitment being molded from a single mass of plastic material and including an end panel adapted to overlay said open end and engage said rim to close said container, a first annular skirt depending downwardly from the peripheral edge of said second end panel, said first annular skirt being dimensioned to telescopingly receive and encircle said rim and to project downwardly therebelow, radially extending cam means on the outer surface of said first annular skirt in vertically spaced relation to said end panel, said retaining fitment being adapted to be forced downwardly onto said sealing fitment to seal said container and to be lifted therefrom to open the container, said retaining fitment including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a second downwardly depending annular skIrt dimensioned to closely encircle said first annular skirt and to engage said force said cam means radially inward to compress said first annular skirt inward beneath said rim when said retaining fitment is forced downward onto said sealing fitment to thereby releasably retain said closure cap assembly on the container, an annular concentric channel formed in said end panel of said sealing fitment and extending only part way therethrough, a plurality of circumferentially spaced apertures formed in and extending through said end panel from within said channel, an annular concentric ring formed on said end panel of said retaining fitment and adapted to fit into said channel and seal said apertures when said cap assembly is mounted on said container, and eccentric lifting tab means on said retaining fitment for applying a lifting force to one side of said retaining fitment to progressively lift said retaining fitment upward from one side and thereby progressively withdraw said annular concentric ring from said channel.

Claim 44

A two-part closure cap assembly for a container having an outwardly flared unthreaded neck terminating at its open end in a substantially smooth rim overhanging a portion of the outer surface of the neck, said closure cap assembly comprising, in combination, a sealing fitment and a retaining fitment, said sealing fitment being molded from a single mass of plastic material and including an end panel adapted to overlay said open end and engage said rim to close said container, a first annular skirt depending downwardly from the peripheral edge of said second end panel, said first annular skirt being dimensioned to telescopingly receive and encircle said rim and to project downwardly therebelow, radially extending cam means on the outer surface of said first annular skirt in vertically spaced relation to said end panel, said retaining fitment being adapted to be forced downwardly onto said sealing fitment to seal said container and to be lifted therefrom to open the container, said retaining fitment including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a second downwardly depending annular skIrt dimensioned to closely encircle said first annular skirt and to engage said force said cam means radially inward to compress said first annular skirt inward beneath said rim when said retaining fitment is forced downward onto said sealing fitment to thereby releasably retain said closure cap assembly on the container, an annular concentric channel formed in said end panel of said sealing fitment and extending only part way therethrough, a plurality of circumferentially spaced apertures formed in and extending through said end panel from within said channel, an annular concentric ring formed on said end panel of said retaining fitment and adapted to fit into said channel and seal said apertures when said cap assembly is mounted on said container, and eccentric lifting tab means on said retaining fitment for applying a lifting force to one side of said retaining fitment to progressively lift said retaining fitment upward from one side and thereby progressively withdraw said annular concentric ring from said channel.

Claim 45

The closure cap defined in claim 39 further comprising an outwardly directed flange formed on said sealing fitment and projecting outwardly from said first annular skirt at the peripheral edge of said end panel, and pivot flange means formed on and extending part way only around the inner surface of said second annular skirt in substantially opposed relation to lifting tab means, said pivot flange being adapted to snap over said outwardly directed flange when said retainer is installed on said sealing fitment and to resist vertical movement of the side of said retaining fitment opposite said lifiting tab upon initial lifting thereof.

Claim 46

A two-part closure cap for a pressurized container having an unthreaded neck terminating at its open end in a substantially smooth rim having a diameter greater than the outside diameter of the neck at a point spaced below said rim, said closure cap comprising, in combination, a sealing fitment and a cooperating retaining fitment, said sealing fitment being formed from a resilient material and including an end panel having a downwardly depending annular skirt integrally formed thereon adjacent its outer periphery and a downwardly depending annular sealing ring inwardly spaced from and concentric with said skirt, a vent opening formed in and extending through said end panel, said skirt including a radially extending flange portion extending therearound below said end panel, said flange portion having an outside diameter greater than the maximum diameter of said end panel, said sealing ring having an outer radial surface dimensioned to engage and form a seal with the inner surface of said neck, said retaining fitment being adapted to telescope onto said sealing fitment when said sealing fitment is positioned on said container neck and including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a downwardly depending skirt having an internal diameter less than the outside diameter of said radially extending flange and adapted to engage said flange and cam said annular skirt of said sealing fitment inwardly beneath said smooth rim of said neck when said retaining fitment is telescoped downwardly onto said sealing fitment, and vent sealing means carried on said retaining fitment and adapted to engage and close said vent opening when said closure cap is installed on the container.

Claim 47

A two-part closure cap for a pressurized container having an unthreaded neck terminating at its open end in a substantially smooth rim having a diameter greater than the outside diameter of the neck at a point spaced below said rim, said closure cap comprising, in combination, a sealing fitment and a cooperating retaining fitment, said sealing fitment being formed from a resilient material and including an end panel having a downwardly depending annular skirt integrally formed thereon adjacent its outer periphery and a downwardly depending annular sealing ring inwardly spaced from and concentric with said skirt, a vent opening formed in and extending through said end panel, said skirt including a radially extending flange portion extending therearound below said end panel, said flange portion having an outside diameter greater than the maximum diameter of said end panel, said sealing ring having an outer radial surface dimensioned to engage and form a seal with the inner surface of said neck, said retaining fitment being adapted to telescope onto said sealing fitment when said sealing fitment is positioned on said container neck and including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a downwardly depending skirt having an internal diameter less than the outside diameter of said radially extending flange and adapted to engage said flange and cam said annular skirt of said sealing fitment inwardly beneath said smooth rim of said neck when said retaining fitment is telescoped downwardly onto said sealing fitment, and vent sealing means carried on said retaining fitment and adapted to engage and close said vent opening when said closure cap is installed on the container.

Claim 48

A two-part closure cap for a container having an unthreaded neck terminating at its open end in a substantially smooth rim having a diameter greater than the outside diameter of the neck at a point spaced below said rim, said closure cap comprising, in combination, a sealing fitment and a cooperating retaining fitment, said sealing fitment being formed from a resilient material and including an end panel having a downwardly depending annular skirt integrally formed thereon adjacent its outer periphery and a downwardly depending annular sealing ring inwardly sPaced from and concentric with said skirt, said annular skirt being adapted to telescope over and project beneath the container''s smooth rim, said sealing ring having an outer radial surface dimensioned to engage and form a seal with the inner surface of the container neck, said retainer fitment being adapted to be telescoped downwardly onto said sealing fitment when said sealing fitment is positioned on the container neck to releasably retain said closure cap on the container neck and to telescope upwardly to release said sealing fitment and thereby permit easy removal of said cap from the container, said retainer fitment including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a downwardly depending skirt having an internal surface adapted to engage and releasably retain said skirt of said sealing fitment beneath the smooth rim of the container neck when said retaining fitment is telescoped downwardly onto said sealing fitment, at least one vent opening formed in and extending through said end panel of said sealing fitment, and cooperating vent sealing means carried on said retainer fitment and adapted to close said at least one vent opening when said retainer fitment is telescoped fully downward onto said sealing fitment, said vent sealing means being adapted to open said at least one vent opening to vent the container upon limited upward telescoping movement of said retainer fitment on said said sealing fitment, said limited upward telescoping movement being insufficient to release and thereby permit removal of said retaining fitment from the container neck.

Claim 49

A two-part closure cap for a container having an unthreaded neck terminating at its open end in a substantially smooth rim having a diameter greater than the outside diameter of the neck at a point spaced below said rim, said closure cap comprising, in combination, a sealing fitment and a cooperating retaining fitment, said sealing fitment being formed from a resilient material and including an end panel having a downwardly depending annular skirt integrally formed thereon adjacent its outer periphery and a downwardly depending annular sealing ring inwardly sPaced from and concentric with said skirt, said annular skirt being adapted to telescope over and project beneath the container''s smooth rim, said sealing ring having an outer radial surface dimensioned to engage and form a seal with the inner surface of the container neck, said retainer fitment being adapted to be telescoped downwardly onto said sealing fitment when said sealing fitment is positioned on the container neck to releasably retain said closure cap on the container neck and to telescope upwardly to release said sealing fitment and thereby permit easy removal of said cap from the container, said retainer fitment including an end panel adapted to overlay at least a portion of the end panel of said sealing fitment adjacent the outer periphery thereof and a downwardly depending skirt having an internal surface adapted to engage and releasably retain said skirt of said sealing fitment beneath the smooth rim of the container neck when said retaining fitment is telescoped downwardly onto said sealing fitment, at least one vent opening formed in and extending through said end panel of said sealing fitment, and cooperating vent sealing means carried on said retainer fitment and adapted to close said at least one vent opening when said retainer fitment is telescoped fully downward onto said sealing fitment, said vent sealing means being adapted to open said at least one vent opening to vent the container upon limited upward telescoping movement of said retainer fitment on said said sealing fitment, said limited upward telescoping movement being insufficient to release and thereby permit removal of said retaining fitment from the container neck.

Claim 50

The closure cap as defined in claim 42 wherein said at least one vent opening comprises a plurality of apertures formed in and extending through said end panel of said sealing fitment, said vent sealing means being adapted to successively vent said apertures upon upward telescoping movement of said retaining fitment.