CA1283079C - Pasteurizable container closure - Google Patents
Pasteurizable container closureInfo
- Publication number
- CA1283079C CA1283079C CA000470840A CA470840A CA1283079C CA 1283079 C CA1283079 C CA 1283079C CA 000470840 A CA000470840 A CA 000470840A CA 470840 A CA470840 A CA 470840A CA 1283079 C CA1283079 C CA 1283079C
- Authority
- CA
- Canada
- Prior art keywords
- bottle
- closure
- container
- skirt
- finish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
- B67B3/00—Closing bottles, jars or similar containers by applying caps
- B67B3/02—Closing bottles, jars or similar containers by applying caps by applying flanged caps, e.g. crown caps, and securing by deformation of flanges
- B67B3/10—Capping heads for securing caps
- B67B3/18—Capping heads for securing caps characterised by being rotatable, e.g. for forming screw threads in situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/348—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being rolled or pressed to conform to the shape of the container, e.g. metallic closures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Dental Preparations (AREA)
Abstract
ABSTRACT
A closure or bottles is disclosed which includes an internal radius support disk or cylinder for positioning within the bottle mouth to enable the bottle to resist radial inward deformation when subjected to pasteurization or other post-bottling heat treatment. The closure can be formed by coining a conventional aluminum roll-on cap blank using a pressure block having a central land projectable into the mouth of the bottle to form the support disk or cylinder from the top of the cap blank.
A closure or bottles is disclosed which includes an internal radius support disk or cylinder for positioning within the bottle mouth to enable the bottle to resist radial inward deformation when subjected to pasteurization or other post-bottling heat treatment. The closure can be formed by coining a conventional aluminum roll-on cap blank using a pressure block having a central land projectable into the mouth of the bottle to form the support disk or cylinder from the top of the cap blank.
Description
7!3 PASTEURIZABLE CONTAINER C OSURE
This invention relates generally to closures for containers formed of thermoplastic resins, and particularly -to closures which are specifically designed for sealing such containers of pressurized liquids, such as carbonated beverages in situations where, after filling, the bottle and its contents will be subjected to an elevated heat treatment of one sort or another, such as pasteurization.
The use of thermoplastic resins to form bottles for containing various liquid commodities has expanded rapidly in recent years. Much of the growth has occurred : in the development of non-returnable containers for carbonated beverages, the containers beiny typically molded of thermoplastic polyethylene terephthalate ~PET). Bottles of this construction are disclosed in United States Patent 3,733,309. The toiletry, cosmetic, - detergent, and pharmaceutical markets are examples of other industries in which significant grow~h has occurred in the use of such plastic containers and bottles.
Despite this expansion, the development of satisfactory closures for such bottles for certain products has remained illusive.
Certain products require post-bottling heat treatment, such as pasteurization, to assure stable product quality and long shelf life. An example of such a product is beer. Pasteurized bottled beer is produced by filling cold beer into previously rinsed containers which ' , . ~ ~, .... ... ~ . . .. .
I
are then capped. The bot~led beer is then passed through a pasteurizer where the bottle is subjected to an external spray of water for 20 minutes or more with the temperature of the water being approximately 150 degrees F. The pasteurizer is programmed such that the beer temperature rises to about 140 degrees F and is held at that temperature for about 6 minutes. The product is then cooled as it exits the pasteurizer.
Numerous closures have been employed in an attempt to seal the containers in such a manner that when subjected to the elevated temperature of pasteurization ~ and inherent internal pressures, the integrity of the seal ; remains intact. One type of closure employed was the conventional aluminum roll-on closure of the type used on soft drink bottles wherein the skirt of the closure has threads or impressions formed in it by the deformation of ; the skirt against the finish of the container. An example of an apparatus for applying such beverage closures with a locXing band (pilfer proof ring3 is described in United States Patent 3,760,561. Closures of molded plastic similar to those disclosed in United States Patents 4j322,009 or 4,352,436 have also been tested. It has been observed that when PET containers are sealed with conventional aluminum roll-on caps or with plastic caps featuring a top edge seal, and the sealed containers then subjected to the pasteurization process, closure leak failures occur in more than 5% of the containers.
C)'7s3 It has been observed that the cause for the failure is generally a reforming or a movement of the sealing surface, primarily of the bottle finish, under the temperatures and pressures involved during the pasteurization process. To overcome this problem, it has been suggested that the polyester forming the container itself be modified by a heat l:reatment. See, for example, United States Patents 4,039,641 and 4,375,442. However, even when the bottles are heat-set and conventional closures as previously discussed are employed, the elevated temperatures and pressures of the pasteurization treatment cause the thermoplastic in the region of the finish to creep sufficiently to cause seal failure resulting in loss of carbonation and possible product contamination.
It has been suggested to provide a separate hermetic seal over the mouth of the bottle, for example, by a mylar film sonically welded to the mouth of the bottle. The presencs of the welded seal is no~ only permitted but also desirable in certain industries, such 2S pharmaceuticals in that it can be used to indicate to the purchaser the absence of any tampering with the contents of the container. In other industries, however, thP presence of such a seal is thought to be commercially : unacceptable to the public. It is generally accepted that the presenc~ of such a sonically welded seal on the mouth of a bottle containing beer, ale, or other malt liquor ~, .
~ ;
30'79 . ~, would be commercially unsa-tisfactory.
Broadly, the present invention provides a closure which includes an internal radius support means in the form of a cylinder or disk which is positioned within the container mouth to enable the container to resist radial deformation of the mouth. The cylinder or disk depends into the ;nouth of the container a sufficient distance to provide support with sufficient compressive strength to resist any inward radial collapse of the top edge of the opening of the container so as to maintain the integrity of contact between the sealing portion of the closure and the outer edge of the top sealing surface of the container. The support disk does not generally form a sealing contact with the inner edge of the mouth of the container. The support disk can be preformed in the cap or can be created by a forming of the cap blank at the time the cap is applied to the bottle.
More particularly, the invention in one aspect pertains to a plastic container and closure for use on the plastic container, the plastic container consisting essentially of a thermoplastic resin which is deformable when subjected to an elevated temperature equivalent to pasteurization having an opening including a top sealing surface and an externally ; screw-threaded finish, the container and closure containing liquid at an elevated pressure. The closure is especially adapted to assist the opening of the container to resist deformation due to exposure to the elevated temperature followed by cooling. The closure comprises a metal cap having a liner, the metal cap including an annular skirt portion having threads 30'7~3 -~a-cooperatively engaging the external screw-threads on the finish of the container. A rim portion is integral with a top of the skirt portion and extends radially inward from the skirt portion sealingly engaging the sealing surface of the container.
A disk-shaped internal support portion is integral with an inner edge of the rim portion and depends therefrom into the mouth of the container so as to be positioned below the sealing surface of the container. The support portion has sufficient compressive strength to resist radial collapse of the top of the opening of the container to maintain the rim portion of the closure and the sealing surface of the container in sealing engagement during exposure of the liquid-filled container and closure to the elevated temperature and subsequent cooling, so as to maintain the integrity of contact between the rim portion of the closure and the top sealing surface of the container.
The invention further pertains to a bottle of a carbonated beverage and a metal closure for sealing the bottle to maintain a selected pressure within the bottle where the bottle,contents and closure are subjected to an elevated heat treatment such as pasteurization followed by cooling. The bottle comprises a plastic material which is deformable when subjected to the elevated heat treatment and the bottle is formed to include a finish portion and an end portion, the end portion having a cylindrical inner surface and an outwardly presented sealing surface, with the surfaces cooperating to define a mou-th for the bottle. The closure is mounted over the end portion of the bottle and has a skirt surrounding and interengaged with the finish portion of the bottle to hold the . .
. . ~' .
()'79 -4b-closure in place on -the bottle. An annular wab is coupled in sealing relation to the sealing surface of the bottle and seal-maintaining means is provided for maintaining the annular web of the closure in coupled relation to the sealing surface of the bot-tle during the elevated heat treatment and sub-sequent cooling. The seal-maintaining means comprises a radially outwardly presented side wall contiguous to the cylind-rical inner surface of the end portion of the bottle. A disk projects from an inner edge of the side wall across the mouth of the bottle, the disk and side wall providing support for the end portion of the bottle to maintain, during the heat treatment and subsequen-t cooling, the integrity of coupling between the outwardly presented sealing surface of the bottle and the annular web portion of the closure, whereby unwanted leakage from the bottle is prevented.
Still further, the invention pertains to the process of pasteurizing a carbonated beverage contained in a bottle, the bottle consisting essentially of a thermoplastic resin which is deformable when subjected to an elevated temperature equivalent to pasteurization, and the bottle being formed to include a finish portion defining the mouth of the bottle. There is provided a method of maintaining the configuration of the finish of the bottle during exposure to the elevated temperature, the method including the sequential steps of providing a metal closure having a substantially flat top wall defining a con-tinuous peripheral edge and a downwardly extending skirt depending from the peripheral edge of the top wall, and applying the closure to the bottle to cause the skirt to come into contact with the ~ A
. . .
. .
0'79 -4c-finish portion of the bottle to position the closure in place on the bottle without interlocking the skirt and the finish portion. The method also includes deforming the top wall of the applied closure to define a bottle mouth configuration-maintaining member extending downwardly a predetermined distance into the mouth of the bottle in spaced relation to the radially outwardly situated closure skirt. The skirt of the applied closure and the finish portion are interengaged to hold the configuration-maintaining member within the mouth of the bottle to resist radially inward movement of the finish portion of the bottle during exposure of the bottle and closure assembly to the elevated pasteurization temperature and to retain the closure in place on the bottle, whereby the configuration of the finish portion of the bottle is maintained to prevent unwanted leakage from the bottle and closure assembly during pasteuri-zation.
The reformation of conventional aluminum roll-on caps or other caps can be achieved at the time of application by the use of a modified pressure block to form a closure in accordance with this invention. The ,~ pressure block includes a central land of a diameter slightly less,than the inner diameter of the mouth of the container to which the closure is to be applied. The - central land has an axial dimension sufficient to displace a central portion in the form of a disk or cylinder of the material forming the cap into the mouth of the container , . .
', :
' l~f~ 3'79 so as to enable the container to resist radial deformation. The skirt of the aluminum cap can be elongated slightly so as to still properly interact with the conventionally positioned piler-proof enlargement band on the bottle. Alternatively, a conventionally sized aluminium roll-on cap can be used with a bottle having a slightly narrower pilfer proof band.
Early experimental results suggest that the present invention is adaptable to all conventional inish sizes including both 28mm and 38mm. Surprisingly, it has been determined that it is no longer necessary to use bottles with heat-set finishes and instead conventional amorphus untreated bottle finishes of PET or other thermoplastic resin can be employed with the present cap with no seal failure occurring during or subsequent to the conventional beer pasteurization process.
The various features and advantages derived from the present invention can be more readily understood by a consideration of the following discussion and the accompanying drawings illustrating the prior art a~d the inventionf and showing a preferred embodiment of the invention exemplifying the best mode of carrying out the invention as presently perceived. In such drawings:
Fig. 1 is an elevation view of a typical PET
bottle on which a cap of the present invention can be employed.
Fig. 2 is a sectional detail view of a .
'79 conventional PET bottle having a heat-set finish with a conventional roll-on aluminum cap properly positioned ; thereon.
Fig. 3 is a sectional view of the bottle and cap shown in Fig. 2 subsequent to the beer pasteurization treatment.
Fig. 4 is a sectiona:l view of an aluminum roll-on cap in accordance with the present invention.
Fig. 5 is a sectional view of a molded plastic cap in accordance with the present invention.
Fig. 6 is a partial sectional view of a pressure bloc~ in accordance wi~h the present invention in touching contact with a cap blank on the top of a bottle.
Fig. 7 is a sectional view o the pressure block shown in Fig. 6 in full pressure contact forming the cap blank on the top of the bottle.
Fig. 8 is a sectional view of the pressure block shown in Fig. 6 with the thread forming members engaging the skirt of the cap to roll or swage the closure threads.
A bottle lO is shown in Fig. 1 which has been formed by conventional blow molding techniques of a suitable plastic material, such as polyethylene terephthalate, polypropylene, polyethylene, or polyvinylchloride. The bottle lO has an opening 12 at the top which includes a top sealing surface 14 and a screw-threaded finish 16 terminating in its lower end with a pilfer-proof band 18. Spaced below the pilfer proof band 18 is a neck support ledge 20. Below the neck support ledge 20 is a tubular sidewall or body portion 22. The bottle 10 typically terminates at its lower end in a generally convex or dome-shaped pressure bottom 24 which is enclosed in a base cup 26 either cemented or snap fit to the lower end of the bottle 10. The bottle 10 is generally symmetrical about longitudinal axis 28 although various designs have been adopted particularly for the tubular sidewall portion 22 as a secondary indication of the bottle contents.
Bottles 10 having the general configuration illustrated in Fig. 1 have been subjected to a crystallization of the finish 16 in general accordance with the teachings of United States Patent 4, 375,442. A
sectional detail of such a bottle 10 is shown in both Figs. 2 and 3. In Fig. 2, the crystallized section 11 shows some small variation of the linearity of the internal surface 13 of the bottle 10 due principally to heat shrinkage which occurs during the crystallization process. The uncrystalli2ed portion 15 of bottle 10 remains substantially undeformed even through a typical capping procedure.
In a typical capping procedure, an aluminum cap 30 is applied which includes a deformable plastic liner typically made o~ a moldable thermoplastic such as polyvinylchloride or e~hylene~inylacetate. The cap 30 includes a flat ~op wall 32 and a skirt portion 34 which :
~ 8~ 9 has been swaged by rollers against the finish 16 of the bottle 10 in order to form cooperative threads 36. The process for forming such threads is well known and disclosed, for example, in United States Patent 3,760,561. The cap 30 also includes a pilfer-proof ring portion 38 which has been swacJed under the pilfer-proof band 18 at the time the threacls 36 are formed.
When a cap 30 is properly applied as shown in Fig. 2 under the usual soft drink bottling process which includes no pasteurization or other elevated temperature scheme, the cap seals satisfactorily and a negligible failure rate is observed. When such a cap is employed in bottling beer or other commodities which are then subjected to a post bottling pasteurization process as previously outlined, it has been observed that the neck portion of the bottle 10 has deformed to the shape shown in Fig. 3. Despite the fact that portion 11 of the bottle has been crystallized or heat set, considerable deformation particularly of the sealing surface 14 is observed. Tests have shown that a failure rate of more than 5% can be expected even in bottles having crystallized finishes containing beer after having completed the beer pasteurization cycle described above.
The deformation observed is characterized by an essentially radial inward collapse of the mou~h portion 12 which in turn causes th sealing surface 14 to draw away from the rim portion 33 of the cap 30. While in many , 3~ 9 _g _ instances the deformation of the bottle is so small as to not cause a problem, in more than 5% of the bottles, the deformation is sufficient to cause a leak to develop.
This inward deformation of the bottle mouth 1~
can be prevented by use of a cap constructed in accordance with the present inv~ntion. One such cap 40 is shown in Fig. 4 to include an annular skirt portion 42 having threads 44 engaging the external screw threaded finish 16 of the container 10. A rim portion 46 integral with the top 45 of the skirt portion 42 extends radially inward from the skirt and sealingly engages the sealing surface 14 of the bottle. An internal support portion 48 is integral with the inner edge 47 of the rim portion and depends therefrom into the mouth 12 of the container. The support portion 48 has the form of a cylinder and has sufficient compressive strength to resist any radial collapse of the top edge of the opening 12 of the bottle so as to maintain the integrity of contact between the rim portion 46 of the cap 40 and the sealing surface 14 of the container 10. The cap will preferrably include a pilfer-proof ring 49 which engages the pilfer-proof band 18 of the container in the usual fashion. The cap 40 will include a conventional liner ~1 similar to the liner 3~ of cap 30.
An alternative embodiment of the invention is illustrated as cap 50 in Fig. 5. Cap 50 is shown to be constructed of a suitable molded plastic resin such as .
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.
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.
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polypropylene, polyethylene, copolymers or mechanical blends of these, or other suitable polymers. The cap 50 can inGlude one or more sealing rings or ridges such as are variously disclosed in United States Patents 4,276,989, 4,299,328, and 4,398,645. Alternatively, the cap can include a flowed-in sealing liner 52 such as that disclosed in United States Pat:ent No. 4,331,249 the material of which may be selected from a vinylchloride type resin and can include any of those disclosed by : lO United States Patent No. 4,392,581. The cap 50 includes a skirt portion 54 having threads 55 engaging the external screw-threaded finish 16 of the container 10. The rim portion 56 including either the liner 52 as illustrated or ; sealing rings as disclosed in prior art, engages the sealing surface 14 of the bottle lO. An internal support portion 5J8 depends from the rim portion 56 into the mouth 12 of the container 10. The material selected for forming the support portion should have sufficient compressive : strength to resist any radial inward collapse of the top edge 12 of the bottle 10 so as to maintain the integrity : of contact between the rim portion 56 of the cap 50 and the sealing surface 14 of the container lO. The cap 50 can include a pilfer-proof ring 59 which engages ~he pilfer-proof band 18 of the bottle lO. The cap 50 can be applied with the aid of apparatus such as that disclosed : in United States Patent 4,308,707.
The cap shown in Fig. 4 was installed in a manner ~307~ , discussed below on PET bottles containing beer. The bottles did not have a heat treated or crystallized finish but instead were made of conventional amorphous untreated PET. The bottles with the cap 40 installed in place were subjected to the convention beer pasteurization treatment discussed above and no failures whatsoever were observed.
It is believed that the central support portion 48 o cap 40 provided a sufficient resistance to counter any tendency for the radial collapse of the top portion of the bottle during the pasteurization procedure thereby maintaining the in~egrity of contact between the top ; sealing surface 14 of the bottle and the rim portion 46 of the cap.
The closure 40 can be formed from conventional cap blanks during the roll forming capping process by including a modified pressure block ~0 such as is shown in Figs. 6 - 8. The pressure block 60 is used in a conventional capping machine 61 the details of which are not shown but can comprise an apparatus such as that shown '!~ 20 in United States Patent 3,760,561 or other conventional machines. The pressure bloc~ 60 includes an annular ring portion 62 for ensuring the sealing engagement of the cap and the ~op surface of the container. The pressure block 60 also includes a central land por~ion 64 having a diameter less than the inner diameter of the mouth 12 of the bottle. The land 64 extends in the direction of axis 65 axially a distance sufficien~ to displace a central :
-~ - . .
:; .
3(3~79 disk or cylinder of the metal forming the cap blank 43 into the mouth 12 of the bottle 10. As illustrated, the central land portion 64 comprises one end of a cylinder 67 havinq three distinct radius portions including the land portion 64 and outer rim portion 66 and a body portion 68. The outer rim portion 66 and body portion 68 are snugly received within the sleeve 63 of the pressure block 60 while the central land port:ion 64 extends axially downward so as to project into the container mouth 12.
The method for simultaneously forming and applying a closure in accordance with the present invention is illustrated in Figs. 6 - 8. As shown in Fig.
6, a conventional aluminum roll-on cap blank 43 is positioned over the finish 14 of the bottle 10 and the - capping machine with the modified pressure block 60 descends to contact the top of the cap blank 43. As in the conventional process, the bottle 10 is retained and supported by the neck support 20 so that a compressive force may be applied to the cap blank 43.
As the pressure block 60 descends in direction D
against the support S of the bottle 10, the central land portion 64 of the pressure block 60 contacts and depresses a central portion in the form of cylinder or disk 48 into the mouth 12 of the bottle as shown in Fig. 7. This causes the contiguous annular portion 47 into conorming relation with the cylindrical inner surface 12 of the rim of the bottle 10. The annular ring portion 62 on the .
~L G~ O ;;~3 l~wer end of sleeve 63 of the pressure block 60 then contacts the outer rim 45 to pinch the liner 41 in tight sealing relation with the sealing surface 14 of the bottle 10 .
With the modified pressure block thus in place, the thread rollers 72 and the pilfer-proof band roller 74 radially contact the outer surface of the skirt 42 as shown in Fig. 8 to form the threads 44 and swage the pilfer-proof ring 49 around the bottle finish 16 in the 10 conventional manner. The rollers 72 and 74 are then retracted and the capped bottle released from the capping machine in the usual process, leaving a cap 40 as shown in Fig. 4 firmly in place on the bottle 10.
Inasmuch as ~he displacement of the central disk - 48 downward into the mouth of the bottle requires a slightly greater amount of aluminum than would be necessary with a flat topped cap such as is shown in Fig.
This invention relates generally to closures for containers formed of thermoplastic resins, and particularly -to closures which are specifically designed for sealing such containers of pressurized liquids, such as carbonated beverages in situations where, after filling, the bottle and its contents will be subjected to an elevated heat treatment of one sort or another, such as pasteurization.
The use of thermoplastic resins to form bottles for containing various liquid commodities has expanded rapidly in recent years. Much of the growth has occurred : in the development of non-returnable containers for carbonated beverages, the containers beiny typically molded of thermoplastic polyethylene terephthalate ~PET). Bottles of this construction are disclosed in United States Patent 3,733,309. The toiletry, cosmetic, - detergent, and pharmaceutical markets are examples of other industries in which significant grow~h has occurred in the use of such plastic containers and bottles.
Despite this expansion, the development of satisfactory closures for such bottles for certain products has remained illusive.
Certain products require post-bottling heat treatment, such as pasteurization, to assure stable product quality and long shelf life. An example of such a product is beer. Pasteurized bottled beer is produced by filling cold beer into previously rinsed containers which ' , . ~ ~, .... ... ~ . . .. .
I
are then capped. The bot~led beer is then passed through a pasteurizer where the bottle is subjected to an external spray of water for 20 minutes or more with the temperature of the water being approximately 150 degrees F. The pasteurizer is programmed such that the beer temperature rises to about 140 degrees F and is held at that temperature for about 6 minutes. The product is then cooled as it exits the pasteurizer.
Numerous closures have been employed in an attempt to seal the containers in such a manner that when subjected to the elevated temperature of pasteurization ~ and inherent internal pressures, the integrity of the seal ; remains intact. One type of closure employed was the conventional aluminum roll-on closure of the type used on soft drink bottles wherein the skirt of the closure has threads or impressions formed in it by the deformation of ; the skirt against the finish of the container. An example of an apparatus for applying such beverage closures with a locXing band (pilfer proof ring3 is described in United States Patent 3,760,561. Closures of molded plastic similar to those disclosed in United States Patents 4j322,009 or 4,352,436 have also been tested. It has been observed that when PET containers are sealed with conventional aluminum roll-on caps or with plastic caps featuring a top edge seal, and the sealed containers then subjected to the pasteurization process, closure leak failures occur in more than 5% of the containers.
C)'7s3 It has been observed that the cause for the failure is generally a reforming or a movement of the sealing surface, primarily of the bottle finish, under the temperatures and pressures involved during the pasteurization process. To overcome this problem, it has been suggested that the polyester forming the container itself be modified by a heat l:reatment. See, for example, United States Patents 4,039,641 and 4,375,442. However, even when the bottles are heat-set and conventional closures as previously discussed are employed, the elevated temperatures and pressures of the pasteurization treatment cause the thermoplastic in the region of the finish to creep sufficiently to cause seal failure resulting in loss of carbonation and possible product contamination.
It has been suggested to provide a separate hermetic seal over the mouth of the bottle, for example, by a mylar film sonically welded to the mouth of the bottle. The presencs of the welded seal is no~ only permitted but also desirable in certain industries, such 2S pharmaceuticals in that it can be used to indicate to the purchaser the absence of any tampering with the contents of the container. In other industries, however, thP presence of such a seal is thought to be commercially : unacceptable to the public. It is generally accepted that the presenc~ of such a sonically welded seal on the mouth of a bottle containing beer, ale, or other malt liquor ~, .
~ ;
30'79 . ~, would be commercially unsa-tisfactory.
Broadly, the present invention provides a closure which includes an internal radius support means in the form of a cylinder or disk which is positioned within the container mouth to enable the container to resist radial deformation of the mouth. The cylinder or disk depends into the ;nouth of the container a sufficient distance to provide support with sufficient compressive strength to resist any inward radial collapse of the top edge of the opening of the container so as to maintain the integrity of contact between the sealing portion of the closure and the outer edge of the top sealing surface of the container. The support disk does not generally form a sealing contact with the inner edge of the mouth of the container. The support disk can be preformed in the cap or can be created by a forming of the cap blank at the time the cap is applied to the bottle.
More particularly, the invention in one aspect pertains to a plastic container and closure for use on the plastic container, the plastic container consisting essentially of a thermoplastic resin which is deformable when subjected to an elevated temperature equivalent to pasteurization having an opening including a top sealing surface and an externally ; screw-threaded finish, the container and closure containing liquid at an elevated pressure. The closure is especially adapted to assist the opening of the container to resist deformation due to exposure to the elevated temperature followed by cooling. The closure comprises a metal cap having a liner, the metal cap including an annular skirt portion having threads 30'7~3 -~a-cooperatively engaging the external screw-threads on the finish of the container. A rim portion is integral with a top of the skirt portion and extends radially inward from the skirt portion sealingly engaging the sealing surface of the container.
A disk-shaped internal support portion is integral with an inner edge of the rim portion and depends therefrom into the mouth of the container so as to be positioned below the sealing surface of the container. The support portion has sufficient compressive strength to resist radial collapse of the top of the opening of the container to maintain the rim portion of the closure and the sealing surface of the container in sealing engagement during exposure of the liquid-filled container and closure to the elevated temperature and subsequent cooling, so as to maintain the integrity of contact between the rim portion of the closure and the top sealing surface of the container.
The invention further pertains to a bottle of a carbonated beverage and a metal closure for sealing the bottle to maintain a selected pressure within the bottle where the bottle,contents and closure are subjected to an elevated heat treatment such as pasteurization followed by cooling. The bottle comprises a plastic material which is deformable when subjected to the elevated heat treatment and the bottle is formed to include a finish portion and an end portion, the end portion having a cylindrical inner surface and an outwardly presented sealing surface, with the surfaces cooperating to define a mou-th for the bottle. The closure is mounted over the end portion of the bottle and has a skirt surrounding and interengaged with the finish portion of the bottle to hold the . .
. . ~' .
()'79 -4b-closure in place on -the bottle. An annular wab is coupled in sealing relation to the sealing surface of the bottle and seal-maintaining means is provided for maintaining the annular web of the closure in coupled relation to the sealing surface of the bot-tle during the elevated heat treatment and sub-sequent cooling. The seal-maintaining means comprises a radially outwardly presented side wall contiguous to the cylind-rical inner surface of the end portion of the bottle. A disk projects from an inner edge of the side wall across the mouth of the bottle, the disk and side wall providing support for the end portion of the bottle to maintain, during the heat treatment and subsequen-t cooling, the integrity of coupling between the outwardly presented sealing surface of the bottle and the annular web portion of the closure, whereby unwanted leakage from the bottle is prevented.
Still further, the invention pertains to the process of pasteurizing a carbonated beverage contained in a bottle, the bottle consisting essentially of a thermoplastic resin which is deformable when subjected to an elevated temperature equivalent to pasteurization, and the bottle being formed to include a finish portion defining the mouth of the bottle. There is provided a method of maintaining the configuration of the finish of the bottle during exposure to the elevated temperature, the method including the sequential steps of providing a metal closure having a substantially flat top wall defining a con-tinuous peripheral edge and a downwardly extending skirt depending from the peripheral edge of the top wall, and applying the closure to the bottle to cause the skirt to come into contact with the ~ A
. . .
. .
0'79 -4c-finish portion of the bottle to position the closure in place on the bottle without interlocking the skirt and the finish portion. The method also includes deforming the top wall of the applied closure to define a bottle mouth configuration-maintaining member extending downwardly a predetermined distance into the mouth of the bottle in spaced relation to the radially outwardly situated closure skirt. The skirt of the applied closure and the finish portion are interengaged to hold the configuration-maintaining member within the mouth of the bottle to resist radially inward movement of the finish portion of the bottle during exposure of the bottle and closure assembly to the elevated pasteurization temperature and to retain the closure in place on the bottle, whereby the configuration of the finish portion of the bottle is maintained to prevent unwanted leakage from the bottle and closure assembly during pasteuri-zation.
The reformation of conventional aluminum roll-on caps or other caps can be achieved at the time of application by the use of a modified pressure block to form a closure in accordance with this invention. The ,~ pressure block includes a central land of a diameter slightly less,than the inner diameter of the mouth of the container to which the closure is to be applied. The - central land has an axial dimension sufficient to displace a central portion in the form of a disk or cylinder of the material forming the cap into the mouth of the container , . .
', :
' l~f~ 3'79 so as to enable the container to resist radial deformation. The skirt of the aluminum cap can be elongated slightly so as to still properly interact with the conventionally positioned piler-proof enlargement band on the bottle. Alternatively, a conventionally sized aluminium roll-on cap can be used with a bottle having a slightly narrower pilfer proof band.
Early experimental results suggest that the present invention is adaptable to all conventional inish sizes including both 28mm and 38mm. Surprisingly, it has been determined that it is no longer necessary to use bottles with heat-set finishes and instead conventional amorphus untreated bottle finishes of PET or other thermoplastic resin can be employed with the present cap with no seal failure occurring during or subsequent to the conventional beer pasteurization process.
The various features and advantages derived from the present invention can be more readily understood by a consideration of the following discussion and the accompanying drawings illustrating the prior art a~d the inventionf and showing a preferred embodiment of the invention exemplifying the best mode of carrying out the invention as presently perceived. In such drawings:
Fig. 1 is an elevation view of a typical PET
bottle on which a cap of the present invention can be employed.
Fig. 2 is a sectional detail view of a .
'79 conventional PET bottle having a heat-set finish with a conventional roll-on aluminum cap properly positioned ; thereon.
Fig. 3 is a sectional view of the bottle and cap shown in Fig. 2 subsequent to the beer pasteurization treatment.
Fig. 4 is a sectiona:l view of an aluminum roll-on cap in accordance with the present invention.
Fig. 5 is a sectional view of a molded plastic cap in accordance with the present invention.
Fig. 6 is a partial sectional view of a pressure bloc~ in accordance wi~h the present invention in touching contact with a cap blank on the top of a bottle.
Fig. 7 is a sectional view o the pressure block shown in Fig. 6 in full pressure contact forming the cap blank on the top of the bottle.
Fig. 8 is a sectional view of the pressure block shown in Fig. 6 with the thread forming members engaging the skirt of the cap to roll or swage the closure threads.
A bottle lO is shown in Fig. 1 which has been formed by conventional blow molding techniques of a suitable plastic material, such as polyethylene terephthalate, polypropylene, polyethylene, or polyvinylchloride. The bottle lO has an opening 12 at the top which includes a top sealing surface 14 and a screw-threaded finish 16 terminating in its lower end with a pilfer-proof band 18. Spaced below the pilfer proof band 18 is a neck support ledge 20. Below the neck support ledge 20 is a tubular sidewall or body portion 22. The bottle 10 typically terminates at its lower end in a generally convex or dome-shaped pressure bottom 24 which is enclosed in a base cup 26 either cemented or snap fit to the lower end of the bottle 10. The bottle 10 is generally symmetrical about longitudinal axis 28 although various designs have been adopted particularly for the tubular sidewall portion 22 as a secondary indication of the bottle contents.
Bottles 10 having the general configuration illustrated in Fig. 1 have been subjected to a crystallization of the finish 16 in general accordance with the teachings of United States Patent 4, 375,442. A
sectional detail of such a bottle 10 is shown in both Figs. 2 and 3. In Fig. 2, the crystallized section 11 shows some small variation of the linearity of the internal surface 13 of the bottle 10 due principally to heat shrinkage which occurs during the crystallization process. The uncrystalli2ed portion 15 of bottle 10 remains substantially undeformed even through a typical capping procedure.
In a typical capping procedure, an aluminum cap 30 is applied which includes a deformable plastic liner typically made o~ a moldable thermoplastic such as polyvinylchloride or e~hylene~inylacetate. The cap 30 includes a flat ~op wall 32 and a skirt portion 34 which :
~ 8~ 9 has been swaged by rollers against the finish 16 of the bottle 10 in order to form cooperative threads 36. The process for forming such threads is well known and disclosed, for example, in United States Patent 3,760,561. The cap 30 also includes a pilfer-proof ring portion 38 which has been swacJed under the pilfer-proof band 18 at the time the threacls 36 are formed.
When a cap 30 is properly applied as shown in Fig. 2 under the usual soft drink bottling process which includes no pasteurization or other elevated temperature scheme, the cap seals satisfactorily and a negligible failure rate is observed. When such a cap is employed in bottling beer or other commodities which are then subjected to a post bottling pasteurization process as previously outlined, it has been observed that the neck portion of the bottle 10 has deformed to the shape shown in Fig. 3. Despite the fact that portion 11 of the bottle has been crystallized or heat set, considerable deformation particularly of the sealing surface 14 is observed. Tests have shown that a failure rate of more than 5% can be expected even in bottles having crystallized finishes containing beer after having completed the beer pasteurization cycle described above.
The deformation observed is characterized by an essentially radial inward collapse of the mou~h portion 12 which in turn causes th sealing surface 14 to draw away from the rim portion 33 of the cap 30. While in many , 3~ 9 _g _ instances the deformation of the bottle is so small as to not cause a problem, in more than 5% of the bottles, the deformation is sufficient to cause a leak to develop.
This inward deformation of the bottle mouth 1~
can be prevented by use of a cap constructed in accordance with the present inv~ntion. One such cap 40 is shown in Fig. 4 to include an annular skirt portion 42 having threads 44 engaging the external screw threaded finish 16 of the container 10. A rim portion 46 integral with the top 45 of the skirt portion 42 extends radially inward from the skirt and sealingly engages the sealing surface 14 of the bottle. An internal support portion 48 is integral with the inner edge 47 of the rim portion and depends therefrom into the mouth 12 of the container. The support portion 48 has the form of a cylinder and has sufficient compressive strength to resist any radial collapse of the top edge of the opening 12 of the bottle so as to maintain the integrity of contact between the rim portion 46 of the cap 40 and the sealing surface 14 of the container 10. The cap will preferrably include a pilfer-proof ring 49 which engages the pilfer-proof band 18 of the container in the usual fashion. The cap 40 will include a conventional liner ~1 similar to the liner 3~ of cap 30.
An alternative embodiment of the invention is illustrated as cap 50 in Fig. 5. Cap 50 is shown to be constructed of a suitable molded plastic resin such as .
...,,, .
.
~ !
.
`"
; .' 0'7~
polypropylene, polyethylene, copolymers or mechanical blends of these, or other suitable polymers. The cap 50 can inGlude one or more sealing rings or ridges such as are variously disclosed in United States Patents 4,276,989, 4,299,328, and 4,398,645. Alternatively, the cap can include a flowed-in sealing liner 52 such as that disclosed in United States Pat:ent No. 4,331,249 the material of which may be selected from a vinylchloride type resin and can include any of those disclosed by : lO United States Patent No. 4,392,581. The cap 50 includes a skirt portion 54 having threads 55 engaging the external screw-threaded finish 16 of the container 10. The rim portion 56 including either the liner 52 as illustrated or ; sealing rings as disclosed in prior art, engages the sealing surface 14 of the bottle lO. An internal support portion 5J8 depends from the rim portion 56 into the mouth 12 of the container 10. The material selected for forming the support portion should have sufficient compressive : strength to resist any radial inward collapse of the top edge 12 of the bottle 10 so as to maintain the integrity : of contact between the rim portion 56 of the cap 50 and the sealing surface 14 of the container lO. The cap 50 can include a pilfer-proof ring 59 which engages ~he pilfer-proof band 18 of the bottle lO. The cap 50 can be applied with the aid of apparatus such as that disclosed : in United States Patent 4,308,707.
The cap shown in Fig. 4 was installed in a manner ~307~ , discussed below on PET bottles containing beer. The bottles did not have a heat treated or crystallized finish but instead were made of conventional amorphous untreated PET. The bottles with the cap 40 installed in place were subjected to the convention beer pasteurization treatment discussed above and no failures whatsoever were observed.
It is believed that the central support portion 48 o cap 40 provided a sufficient resistance to counter any tendency for the radial collapse of the top portion of the bottle during the pasteurization procedure thereby maintaining the in~egrity of contact between the top ; sealing surface 14 of the bottle and the rim portion 46 of the cap.
The closure 40 can be formed from conventional cap blanks during the roll forming capping process by including a modified pressure block ~0 such as is shown in Figs. 6 - 8. The pressure block 60 is used in a conventional capping machine 61 the details of which are not shown but can comprise an apparatus such as that shown '!~ 20 in United States Patent 3,760,561 or other conventional machines. The pressure bloc~ 60 includes an annular ring portion 62 for ensuring the sealing engagement of the cap and the ~op surface of the container. The pressure block 60 also includes a central land por~ion 64 having a diameter less than the inner diameter of the mouth 12 of the bottle. The land 64 extends in the direction of axis 65 axially a distance sufficien~ to displace a central :
-~ - . .
:; .
3(3~79 disk or cylinder of the metal forming the cap blank 43 into the mouth 12 of the bottle 10. As illustrated, the central land portion 64 comprises one end of a cylinder 67 havinq three distinct radius portions including the land portion 64 and outer rim portion 66 and a body portion 68. The outer rim portion 66 and body portion 68 are snugly received within the sleeve 63 of the pressure block 60 while the central land port:ion 64 extends axially downward so as to project into the container mouth 12.
The method for simultaneously forming and applying a closure in accordance with the present invention is illustrated in Figs. 6 - 8. As shown in Fig.
6, a conventional aluminum roll-on cap blank 43 is positioned over the finish 14 of the bottle 10 and the - capping machine with the modified pressure block 60 descends to contact the top of the cap blank 43. As in the conventional process, the bottle 10 is retained and supported by the neck support 20 so that a compressive force may be applied to the cap blank 43.
As the pressure block 60 descends in direction D
against the support S of the bottle 10, the central land portion 64 of the pressure block 60 contacts and depresses a central portion in the form of cylinder or disk 48 into the mouth 12 of the bottle as shown in Fig. 7. This causes the contiguous annular portion 47 into conorming relation with the cylindrical inner surface 12 of the rim of the bottle 10. The annular ring portion 62 on the .
~L G~ O ;;~3 l~wer end of sleeve 63 of the pressure block 60 then contacts the outer rim 45 to pinch the liner 41 in tight sealing relation with the sealing surface 14 of the bottle 10 .
With the modified pressure block thus in place, the thread rollers 72 and the pilfer-proof band roller 74 radially contact the outer surface of the skirt 42 as shown in Fig. 8 to form the threads 44 and swage the pilfer-proof ring 49 around the bottle finish 16 in the 10 conventional manner. The rollers 72 and 74 are then retracted and the capped bottle released from the capping machine in the usual process, leaving a cap 40 as shown in Fig. 4 firmly in place on the bottle 10.
Inasmuch as ~he displacement of the central disk - 48 downward into the mouth of the bottle requires a slightly greater amount of aluminum than would be necessary with a flat topped cap such as is shown in Fig.
2, it is preferred that either the length of the skirt portion 42 of the cap blank be increased or the vertical 20 dimension of the pi1~er-proof band 18 on the bottle finish be shortened so as to ensure continued proper operation of the pilfer-proof ring feature in the convention~l manner.
An increase in skirt length of about .040 inches is believed to be sufficient to achieve the desired results.
Alternatively, the lower margin of the pilfer-proof band may be raised by this same approximate distance to achieve substantially the same results.
~ ' ' " .
. .
. . .
::
While the present invention has been described with reference to a description of preferred embodiments, demonstrative, and comparative examples, it is intended that the invention not be unduly limited by this description, and instead that the invention be defined by the means and their obvious equivalents set forth in the following claims.
,
An increase in skirt length of about .040 inches is believed to be sufficient to achieve the desired results.
Alternatively, the lower margin of the pilfer-proof band may be raised by this same approximate distance to achieve substantially the same results.
~ ' ' " .
. .
. . .
::
While the present invention has been described with reference to a description of preferred embodiments, demonstrative, and comparative examples, it is intended that the invention not be unduly limited by this description, and instead that the invention be defined by the means and their obvious equivalents set forth in the following claims.
,
Claims (12)
1. In the process of pasteurizing a carbonated beverage contained in a bottle, the bottle consisting essentially of a thermoplastic resin which is deformable when subjected to an elevated temperature equivalent to pasteurization, the bottle being formed to include a finish portion defining the mouth of the bottle, a method of maintaining the configuration of the finish of the bottle during exposure to the elevated temperature, the method comprising the sequential steps of:
providing a metal closure having a substantially flat top wall defining a continuous peripheral edge and a downwardly extending skirt depending from the peripheral edge of the top wall, applying the closure to the bottle to cause the skirt to come into contact with the finish portion of the bottle to position the closure in place on the bottle without interlocking the skirt and the finish portion, deforming the top wall of the applied closure to define a bottle mouth configuration-maintaining member extending downwardly a predetermined distance into the mouth of the bottle in spaced relation to the radially outwardly situated closure skirt, and interengaging the skirt of the applied closure and the finish portion to hold the configuration-maintaining member within the mouth of the bottle to resist radially inward movement of the finish portion of the bottle during exposure of the bottle and closure assembly to the elevated pasteurization temperature and to retain the closure in place on the bottle, whereby the configuration of the finish portion of the bottle is maintained to prevent unwanted leakage from the bottle and closure assembly during pasteurization.
providing a metal closure having a substantially flat top wall defining a continuous peripheral edge and a downwardly extending skirt depending from the peripheral edge of the top wall, applying the closure to the bottle to cause the skirt to come into contact with the finish portion of the bottle to position the closure in place on the bottle without interlocking the skirt and the finish portion, deforming the top wall of the applied closure to define a bottle mouth configuration-maintaining member extending downwardly a predetermined distance into the mouth of the bottle in spaced relation to the radially outwardly situated closure skirt, and interengaging the skirt of the applied closure and the finish portion to hold the configuration-maintaining member within the mouth of the bottle to resist radially inward movement of the finish portion of the bottle during exposure of the bottle and closure assembly to the elevated pasteurization temperature and to retain the closure in place on the bottle, whereby the configuration of the finish portion of the bottle is maintained to prevent unwanted leakage from the bottle and closure assembly during pasteurization.
2. The method of Claim 1 wherein the deforming step includes forcing a contiguous annular portion of the top wall into conforming relation with a cylindrical inner surface of the mouth of the bottle.
3. The method of Claim 1 in which the finish includes a threaded portion and in which the interengaging step includes compressing the skirt into conforming relation with the threaded portion.
4. The method of Claim 1 further comprising the step of swaging a pilfer-proof ring below the lower periphery of a pilfer-proof band extending on the outer surface of the bottle below the finish.
5. A plastic container and closure for use on the plastic container, the plastic container consisting essentially of a thermoplastic resin which is deformable when subjected to an elevated temperature equivalent to pasteurization having an opening including a top sealing surface and an externally screw-threaded finish, the container and closure containing liquid at an elevated pressure, the closure being especially adapted to assist the opening of the container to resist deformation due to exposure to said elevated temperature followed by cooling, the closure comprising a metal cap having a liner, the metal cap including an annular skirt portion having threads cooperatively engaging the external screw-threads on the finish of the container, a rim portion integral with a top of the skirt portion and extending radially inward from the skirt portion sealingly engaging the sealing surface of the container and a disk-shaped internal support portion integral with an inner edge of the rim portion and depending therefrom into the mouth of the container so as to be positioned below the sealing surface of the container, the support portion having sufficient compressive strength to resist radial collapse of the top of the opening of the container to maintain the rim portion of the closure and the sealing surface of the container in sealing engagement during exposure of the liquid-filled container and closure to the elevated temperature and subsequent cooling so as to maintain the integrity of contact between the rim portion of the closure and the top sealing surface of the container.
6. The plastic container and closure of Claim 5 wherein the container consists essentially of a thermoplastic resin selected from the group consisting of polyethylene terephthalate, polypropylene, polyethylene, polyvinylchloride, and mechanical blends and copolymers thereof.
7. A bottle of a carbonated beverage and a metal closure for sealing the bottle to maintain a selected pressure within the bottle where the bottle, contents, and closure are subjected to an elevated heat treatment such as pasteurization followed by cooling, the bottle comprising a plastic material which is deformable when subjected to the elevated heat treatment, the bottle being formed to include a finish portion and an end portion, the end portion having a cylindrical inner surface and an outwardly presented sealing surface, the surfaces cooperating to define a mouth for the bottle, the closure being mounted over the end portion of the bottle, the closure having a skirt surrounding and interengaged with the finish portion of the bottle to hold the closure in place on the bottle, an annular web coupled in sealing relation to the sealing surface of the bottle, and seal-maintaining means for maintaining the annular web of the closure in coupled relation to the sealing surface of the bottle during the elevated heat treatment and subsequent cooling, the seal-maintaining means comprising a radially outwardly presented side wall contiguous to the cylindrical inner surface of the end portion of the bottle and a disk projecting from an inner edge of the side wall across the mouth of the bottle, the disk and side wall providing support for the end portion of the bottle to maintain, during the heat treatment and subsequent cooling, the integrity of coupling between the outwardly presented sealing surface of the bottle and the annular web portion of the closure, whereby unwanted leakage from the bottle is prevented.
8. The bottle and closure of Claim 7 further comprising a liner positioned within the skirt conformable to the opening of the bottle in sealing relation thereto.
9. The bottle and closure of Claim 7 wherein the skirt includes threads for cooperatively engaging the finish portion of the bottle.
10. The bottle and closure of Claim 7 further comprising a pilfer proof ring portion joined to a lower edge of the skirt.
11. The bottle and closure of Claim 7 wherein the skirt and seal-maintaining means consists essentially of metal cylinder shaped to conform to the dimensions of the bottle mouth.
12. The bottle and closure of Claim 7, wherein the side wall portion limits radially inward travel of the end portion of the bottle during the cooling of the bottle, contents, and closure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US58655684A | 1984-03-05 | 1984-03-05 | |
| US586,556 | 1984-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1283079C true CA1283079C (en) | 1991-04-16 |
Family
ID=24346227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000470840A Expired - Lifetime CA1283079C (en) | 1984-03-05 | 1984-12-21 | Pasteurizable container closure |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0154502B1 (en) |
| JP (1) | JPS60193850A (en) |
| AT (1) | ATE54895T1 (en) |
| AU (1) | AU565746B2 (en) |
| CA (1) | CA1283079C (en) |
| DE (1) | DE3578788D1 (en) |
| IL (1) | IL74020A (en) |
| ZA (1) | ZA85167B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2514376B2 (en) * | 1987-09-10 | 1996-07-10 | 日本クラウンコルク株式会社 | Sealing method |
| JP4833608B2 (en) * | 2005-08-05 | 2011-12-07 | 麒麟麦酒株式会社 | Sealed container |
| US20090008360A1 (en) * | 2007-05-31 | 2009-01-08 | Graham Packaging Company, L.P. | Finish and closure for plastic pasteurizable container |
| EP4028250A1 (en) * | 2019-09-12 | 2022-07-20 | SABIC Global Technologies B.V. | Container assembly, closure cap for container assembly, container for container assembly, method for manufacturing a container assembly |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191316645A (en) * | 1913-07-21 | 1914-03-05 | Frederick Thomas Marwood | Improvements in and relating to Stoppering Bottles. |
| FR1050765A (en) * | 1951-01-09 | 1954-01-11 | Pirelli | Perfectly sealed screw cap, for plastic containers |
| GB1061686A (en) * | 1965-05-06 | 1967-03-15 | Metal Box Co Ltd | Improvements in or relating to closing containers |
| DE1946312A1 (en) * | 1969-09-12 | 1971-05-27 | Kuehne Peter Dipl Ing | Cap closure for thin-walled plastic bottles with a sharp-edged mouth rim |
| JPS52110176A (en) * | 1976-03-11 | 1977-09-16 | Crown Cork Japan | Cap and method of sealing same |
| JPS52152060U (en) * | 1976-05-13 | 1977-11-17 | ||
| MX148372A (en) * | 1978-09-04 | 1983-04-15 | Cerveceria Cuauhtemoc S A | TOP IMPROVEMENTS FOR PACKAGING |
| JPS5768353A (en) * | 1980-10-17 | 1982-04-26 | Crown Cork Japan | Vessel cover having vessel explosion preventive characteristic |
| AU560751B2 (en) * | 1981-07-24 | 1987-04-16 | H-C Industries Inc. | Plastic bottle closure |
| JPS59165342U (en) * | 1983-04-22 | 1984-11-06 | 株式会社吉野工業所 | sheet metal cap |
-
1984
- 1984-12-20 AU AU36982/84A patent/AU565746B2/en not_active Ceased
- 1984-12-21 CA CA000470840A patent/CA1283079C/en not_active Expired - Lifetime
-
1985
- 1985-01-08 ZA ZA85167A patent/ZA85167B/en unknown
- 1985-01-08 IL IL74020A patent/IL74020A/en not_active IP Right Cessation
- 1985-02-06 JP JP60020171A patent/JPS60193850A/en active Granted
- 1985-02-27 EP EP85301317A patent/EP0154502B1/en not_active Expired - Lifetime
- 1985-02-27 DE DE8585301317T patent/DE3578788D1/en not_active Expired - Lifetime
- 1985-02-27 AT AT85301317T patent/ATE54895T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ATE54895T1 (en) | 1990-08-15 |
| DE3578788D1 (en) | 1990-08-30 |
| IL74020A (en) | 1988-11-30 |
| EP0154502A3 (en) | 1986-06-04 |
| JPH0440266B2 (en) | 1992-07-02 |
| JPS60193850A (en) | 1985-10-02 |
| EP0154502A2 (en) | 1985-09-11 |
| AU565746B2 (en) | 1987-09-24 |
| AU3698284A (en) | 1985-09-12 |
| ZA85167B (en) | 1985-08-28 |
| IL74020A0 (en) | 1985-04-30 |
| EP0154502B1 (en) | 1990-07-25 |
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Legal Events
| Date | Code | Title | Description |
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| MKLA | Lapsed |