US20170327277A1 - Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products - Google Patents
Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products Download PDFInfo
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- US20170327277A1 US20170327277A1 US15/590,647 US201715590647A US2017327277A1 US 20170327277 A1 US20170327277 A1 US 20170327277A1 US 201715590647 A US201715590647 A US 201715590647A US 2017327277 A1 US2017327277 A1 US 2017327277A1
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- container
- lugs
- finish
- food
- metal closure
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Classifications
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- 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
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
- B65D79/0087—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a closure, e.g. in caps or lids
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- 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
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/0485—Threaded or like caps or cap-like covers secured by rotation with means specially adapted for facilitating the operation of opening or closing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
- B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging
-
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
-
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/023—Neck construction
- B65D1/0246—Closure retaining means, e.g. beads, screw-threads
-
- 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
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
-
- 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
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
-
- 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
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
-
- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B2220/00—Specific aspects of the packaging operation
- B65B2220/24—Cooling filled packages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B7/00—Closing containers or receptacles after filling
- B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
- B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
- B65B7/2835—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers applying and rotating preformed threaded caps
Definitions
- the present application relates to container assemblies including metal closures and containers that include a plastic finish and to methods of hot-filling food and beverage products.
- thermoplastic materials such as polyethylene terephthalate (PET)
- PET polyethylene terephthalate
- a metal closure may sometimes grip in an inconsistent manner with plastics, making it difficult to provide container assemblies that may be opened by consumers in a repeatable manner.
- some thermoplastic materials may soften or deform under conditions used during some hot-fill processes that may commonly be used to minimize the growth or presence of bacteria or other contaminants in food and beverage products. Softening of thermoplastics may further exacerbate problems associated with use of metal closures in combination with plastic containers.
- a container assembly may comprise a plastic container including an opening and a finish, the finish including a plastic material that is softer than glass; wherein the finish includes one or more threads; and a metal closure including four lugs; wherein the lugs are configured to engage the one or more threads when the metal closure is placed and rotated on the plastic container and pull the plastic container and the metal closure together.
- metal closures may include lugs that include one or more flattened sides.
- a beverage product may comprise a beverage sterilized using a hot-fill packaging process; and a container assembly including a metal closure and a container that includes a thermoplastic finish.
- the container assembly may include an opening and a metal closure including four lugs.
- lugs may further include one or more flattened sides.
- a method of packaging a food or beverage product may include treating a food or beverage product to a condition that includes application of an elevated temperature greater than about 50° C.; partially cooling the food or beverage product; adding the food or beverage product to a container including a thermoplastic finish having at least one thread; capping the food or beverage product in the container by rotating a metal closure onto the finish, the metal closure including four lugs engaged with the at least one thread sufficient to provide an air-vacuum tight seal; maintaining the food or beverage product and the container at a hold temperature less than the elevated temperature; and further cooling the food or beverage product and the container.
- FIG. 1 is a perspective view of a container assembly including a metal closure and part of a container including a finish.
- FIG. 2A is a bottom plan view of the metal closure of FIG. 1 .
- FIG. 2B is a top plan view of the metal closure of FIG. 1 .
- FIG. 3 is a partial cross-sectional view taken along section A-A of FIG. 2A .
- FIG. 4A is a detailed cross-sectional view of Detail B of FIG. 3 .
- FIG. 4B is a detailed cross-sectional view of an alternative embodiment of a lug.
- FIG. 4C is a detailed cross-sectional view of another alternative embodiment of a lug.
- FIG. 5 is a flowchart illustrating a method of packaging a food or beverage product.
- This disclosure is directed to container assemblies that include a metal closure and a plastic container and to methods of packaging food and beverage products using the container assemblies described herein.
- Apparatuses and methods described herein may include metal closures and plastic containers, including those that may be relatively soft or that may be difficult to use together with hot-fill processes.
- some plastic containers as described herein may be softer than common glass containers.
- plastics described herein may be thermoplastics which may include plastics that may soften, deform or experience structural changes at temperatures at or below temperatures that may be used in hot-fill processing of food and beverage products.
- containers described herein may be made of one or more plastic materials, including but not limited to polyethylene terephthalate (PET).
- PET polyethylene terephthalate
- the containers may be sized to contain various food and beverage products, including, for example, sodas, juices, juice cocktails, sauces, dairy products or the like.
- the closures described herein may be metallic and may be made of any suitable metallic material, including, for example, aluminum, tin, or steel.
- container assemblies described herein may include metallic closures with a diameter of about 38 mm.
- FIG. 1 shows a perspective view of a container assembly including a top portion of a container 10 and a closure 12 .
- Closure 12 may be configured for engagement with a finish 14 of container 10 and may be used to form an air-vacuum tight seal.
- container 10 may be sized for engagement with a closure 12 having an inner diameter (ID cap ) (see FIG. 2A ) of about 38 mm.
- ID cap inner diameter
- container 10 may include a finish with an inner diameter (ID con ) of about 28 mm to about 32 mm, or about 30.5 mm.
- container 10 may include a finish with an outer diameter (OD con ) of about 33 mm to about 37 mm, or about 35 mm.
- Finish 14 may include a top edge 16 , cylindrical sidewall 18 , and one or more threads 20 .
- Threads 20 may include a bottom thread surface 22 .
- Threads 20 may sometimes include a thread stop 24 which may prevent over rotation of closure 12 during opening and closing of the container assembly.
- Closure 12 may include a top panel 26 , a cylindrical sidewall 28 , and a plurality of lugs 38 .
- Top panel 26 may be substantially flat or may be curved as further shown, for example, in FIG. 3 .
- Top panel 26 may include a raised or center portion 30 , annular recessed portion 32 , and an annular edge portion 34 .
- top panel 26 may operate as a vacuum-indicating panel wherein when the container assembly is vented a loss of vacuum pressure may be indicated to a consumer.
- top panel 26 may be shaped so that the closure 12 may have an increased degree of flexibility as compared to a level of flexibility accorded if the top panel 26 was flat.
- a top edge 16 of finish 14 and/or an adjacent or nearby surface of finish 14 may be forced against gasketing material 36 (see FIG. 3 ) when the closure 12 is subjected to a downward force as may occur when closure 12 is rotated onto finish 14 .
- threads 20 may be angled downward such that when the closure 12 is rotated onto the container 10 , lugs 38 cooperate with threads 20 to pull the closure 12 and container 10 together.
- Gasketing material 36 may have a thickness D of about 0.9 mm, or other suitable thickness.
- Closure 12 is further shown in FIG. 2A and FIG. 2B .
- FIG. 2A shows a bottom plan view of the closure 12 .
- FIG. 2B shows a top plan view of closure 12 .
- closure 12 may include a circular rim 40 at a lower edge of sidewall 28 .
- Circular rim 40 may help to guide or assist rotation of the closure 12 on container 10 .
- circular rim 40 may include four lugs 38 .
- the lugs 38 may be spaced about equidistant from each other, such as about 90 degrees apart, or the lugs 38 may have other suitable spacing.
- Closure 12 may be characterized by an inner lug diameter (ID lug ).
- the inner lug diameter refers to the diameter of a circle which intersects the innermost point of each of the lugs 38 .
- the inner lug diameter may be smaller than an inner diameter of the closure (ID cap ).
- the inner diameter of the closure refers to the diameter of a circle defined by the inner surface of the rim 40 in regions that do not include the lugs 38 .
- closure 12 may further be characterized by an outer diameter (OD cap ).
- the inner lug diameter ID lug may be about 35.3 mm
- the inner diameter of the closure ID cap may be about 37 mm
- the outer diameter of the closure OD cap may be about 41.9 mm.
- closure 12 may have an inner diameter ID cap (see FIG. 2A ) of about 38 mm.
- inner diameter ID cap see FIG. 2A
- a closure 12 including four lugs 38 may exhibit significantly improved performance over the previously used three-lug configurations.
- Lugs 38 may be characterized by a lug width (W) of about 3.3 mm.
- the lug width W may be defined herein as the distance between an outer surface of cylindrical sidewall 28 and an inner side (e.g., inner side of portions 60 , 64 , 94 as shown in FIGS.
- a lug width W may be from about 3.0 mm to about 3.5 mm or about 3.2 mm to about 3.4 mm.
- Closure 12 may further be characterized by a height (H) and by a dimension (LH) corresponding to the distance between an outer surface of top panel 26 (which may be measured at annular edge portion 34 ) and top sides (e.g., top sides of portions 58 , 62 , 92 as shown in FIGS. 4A-4C ) of lugs 38 .
- lug 38 may have a generally rounded profile. As shown in FIGS. 4B and 4C , in some embodiments lug 38 may have a profile wherein one or more portions may be flattened.
- lug profile 50 of FIG. 4A is shown to include a rounded lug top portion 58 and a rounded lug inner portion 60 .
- Lug profile 54 of FIG. 4B is shown to include a flattened top portion 62 and a flattened inner portion 64 .
- Lug profile 90 of FIG. 4C is shown to include a flattened top portion 92 and a rounded inner portion 94 .
- other lug embodiments may include a flattened inner portion and a rounded top portion.
- Top portions 58 , 62 , 92 and inner portions 60 , 64 , 94 may respectively engage with the bottom thread surface 22 and cylindrical side wall 18 of finish 14 when closure 12 is engaged with container 10 .
- interaction between the closure 12 and finish 14 may be influenced by frictional interaction between the lugs 38 and either or both of the bottom surface 22 of threads 20 and/or cylindrical sidewall 18 , which may, at least in part, be influenced by the shape of the lugs 38 and/or threads 20 .
- Container assemblies described herein may be used with food and beverage products packaged using either of cold-fill or hot-fill processes.
- Hot-fill processes may be preferred or necessary for some food and beverage products.
- hot-filled processes may be used to sterilize some beverage products and may be necessary to achieve a desired product shelf-life.
- gas contained in the head-space may cool which may result in a concomitant reduction in the head-space pressure.
- the resultant vacuum may sometimes be used with vacuum-indicating panels to provide assurance to a consumer that the product has not been tampered with or otherwise inadvertently opened.
- a hot-fill process may refer to a process wherein a food or beverage product is treated at a temperature of greater than about 50° C.
- some hot-fill processes may include heating a food or beverage product to a temperature of greater than or equal to about 60° C., about 65° C., or about 75° C., or about 100° C.
- some hot-fill processes may include heating a food or beverage product to a temperature of no greater than about 100° C., about 95° C., or about 90° C.
- Hot-fill processing may include holding a food or beverage in a holding cell at such elevated temperature for a period of time such as about 10 seconds to about 30 seconds.
- a food or beverage product may be at least partially cooled to a still elevated temperature (e.g., such as a temperature of between about 65° C to about 90° C).
- the food or beverage product may then be added to a container in a fill process and sealed by engaging the container with a closure.
- the product fill temperature may be about 82° C. to about 85° C.
- the filled container assembly may be maintained at the still elevated temperature for an “in-package” hold step, which may sometimes last for several minutes. The filled container assembly may then be cooled and further processed for distribution.
- PET is a thermoplastic that may start to soften at a temperature of about 76° C. Accordingly, in most hot-fill processes suitable for use with a majority of food and beverage products, deformation of PET, as well as some other thermoplastic containers, may occur to at least some degree. This deformation may be problematic for several reasons. For example, proper engagement of threads 20 and lugs 38 may be disrupted if this deformation is too severe. For example, a removal torque or force necessary to open a container assembly may become highly variable when a thermoplastic is deformed during hot-fill processing. For example, in other container assemblies, some product samples may only be opened by adding an amount of force that is greater than may be readily applied by some consumers. The container assemblies and methods described herein may alleviate or remove this concern.
- the force necessary to open a container assembly may be more reproducibly controlled.
- the shape of lugs 38 and/or threads 20 may be modified to reduce sample-to-sample variation of a force necessary to open a container assembly.
- one or more sides of the lugs 38 may be shaped to possess a profile that is more flattened than used in prior lug designs.
- either or both of top portion 62 or inner portion 64 of lugs 38 may be flattened.
- a flattened portion of a lug refers to a portion of a lug wherein a radius of curvature of the portion is greater than about 1.5 mm.
- one or more lugs may have a flattened top portion characterized by a radius of curvature of greater than about 2.5 mm, about 3.0 mm, or about 3.5 mm, or between about 2.5 mm and about 3.5 mm.
- one or more lugs may have a flattened inner portion characterized by a radius of curvature of greater than about 1.5 mm, about 2.0 mm, or about 2.5 mm, or between about 1.5 mm and about 2.5 mm.
- a method 74 of packaging a food or beverage product using the container assemblies described herein is shown.
- a food or beverage product may be treated to conditions that include application of high temperature. For example, in methods that include hot-filling of a beverage, a temperature of between about 60° C. to about 100° C. may be applied. Heat may be added with or without application of other forms of energy or pressure suitable to help sterilize or reduce one or more product contaminants such as bacteria.
- the food or beverage product may be at least partially cooled. For example, in some embodiments, a trim cooler may be used to reduce the temperature of a food or beverage product.
- the food or beverage product may be added to a container including a thermoplastic finish.
- the now filled container may be capped by engaging the container with a metal closure as described herein.
- the filled and capped container assembly may be held at a hold temperature for a desired hold time. For example, in some embodiments, the filled container assembly may be held at a temperature of about 65° C. to about 90° C. for about 1 minute to about 3 minutes.
- the filled container assembly may be cooled to make a packaged food or beverage product available for further processing and/or distribution to consumers.
Abstract
Description
- This application claims the benefit of U.S. Provisional Patent Application No. 62/334,209 filed May 10, 2016, the disclosure of which is incorporated herein by reference.
- The present application relates to container assemblies including metal closures and containers that include a plastic finish and to methods of hot-filling food and beverage products.
- Many different packaging options have been developed for food and beverage products. Included among the most important criteria for selecting a packaging option are packaging material cost and durability. Accordingly, plastics, including thermoplastic materials, such as polyethylene terephthalate (PET), are among the most common materials used in packaging of food and beverage products. However, limitations are found when using plastic materials together with some food and beverage processing steps and/or in combination with some closures. For example, a metal closure may sometimes grip in an inconsistent manner with plastics, making it difficult to provide container assemblies that may be opened by consumers in a repeatable manner. In addition, some thermoplastic materials may soften or deform under conditions used during some hot-fill processes that may commonly be used to minimize the growth or presence of bacteria or other contaminants in food and beverage products. Softening of thermoplastics may further exacerbate problems associated with use of metal closures in combination with plastic containers.
- Accordingly, there is a need for improved packaging materials that include plastic containers and metal closures and for improved methods of hot-filling food and beverage products using container assemblies that include thermoplastic containers and metal closures.
- In some embodiments, a container assembly may comprise a plastic container including an opening and a finish, the finish including a plastic material that is softer than glass; wherein the finish includes one or more threads; and a metal closure including four lugs; wherein the lugs are configured to engage the one or more threads when the metal closure is placed and rotated on the plastic container and pull the plastic container and the metal closure together. In some embodiments, metal closures may include lugs that include one or more flattened sides.
- In some embodiments, a beverage product may comprise a beverage sterilized using a hot-fill packaging process; and a container assembly including a metal closure and a container that includes a thermoplastic finish. In some embodiments, the container assembly may include an opening and a metal closure including four lugs. In some embodiments, lugs may further include one or more flattened sides.
- In some embodiments, a method of packaging a food or beverage product may include treating a food or beverage product to a condition that includes application of an elevated temperature greater than about 50° C.; partially cooling the food or beverage product; adding the food or beverage product to a container including a thermoplastic finish having at least one thread; capping the food or beverage product in the container by rotating a metal closure onto the finish, the metal closure including four lugs engaged with the at least one thread sufficient to provide an air-vacuum tight seal; maintaining the food or beverage product and the container at a hold temperature less than the elevated temperature; and further cooling the food or beverage product and the container.
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FIG. 1 is a perspective view of a container assembly including a metal closure and part of a container including a finish. -
FIG. 2A is a bottom plan view of the metal closure ofFIG. 1 . -
FIG. 2B is a top plan view of the metal closure ofFIG. 1 . -
FIG. 3 is a partial cross-sectional view taken along section A-A ofFIG. 2A . -
FIG. 4A is a detailed cross-sectional view of Detail B ofFIG. 3 . -
FIG. 4B is a detailed cross-sectional view of an alternative embodiment of a lug. -
FIG. 4C is a detailed cross-sectional view of another alternative embodiment of a lug. -
FIG. 5 is a flowchart illustrating a method of packaging a food or beverage product. - The following terms as used herein should be understood to have the indicated meanings.
- When an item is introduced by “a” or “an,” it should be understood to mean one or more of that item.
- “Comprises” means includes but is not limited to.
- “Comprising” means including but not limited to.
- Where a range of values is described, it should be understood that intervening values, unless the context clearly dictates otherwise, between the upper and lower limits of that range and any other stated or intervening value in other stated ranges may be used within embodiments herein.
- This disclosure is directed to container assemblies that include a metal closure and a plastic container and to methods of packaging food and beverage products using the container assemblies described herein. Apparatuses and methods described herein may include metal closures and plastic containers, including those that may be relatively soft or that may be difficult to use together with hot-fill processes. For example, some plastic containers as described herein may be softer than common glass containers. In some embodiments, plastics described herein may be thermoplastics which may include plastics that may soften, deform or experience structural changes at temperatures at or below temperatures that may be used in hot-fill processing of food and beverage products.
- For example, containers described herein may be made of one or more plastic materials, including but not limited to polyethylene terephthalate (PET). The containers may be sized to contain various food and beverage products, including, for example, sodas, juices, juice cocktails, sauces, dairy products or the like. The closures described herein may be metallic and may be made of any suitable metallic material, including, for example, aluminum, tin, or steel. For example, in some embodiments, container assemblies described herein may include metallic closures with a diameter of about 38 mm.
-
FIG. 1 shows a perspective view of a container assembly including a top portion of acontainer 10 and aclosure 12. Closure 12 may be configured for engagement with afinish 14 ofcontainer 10 and may be used to form an air-vacuum tight seal. In some embodiments,container 10 may be sized for engagement with aclosure 12 having an inner diameter (IDcap) (seeFIG. 2A ) of about 38 mm. For example, in some embodiments,container 10 may include a finish with an inner diameter (IDcon) of about 28 mm to about 32 mm, or about 30.5 mm. In con, some embodiments,container 10 may include a finish with an outer diameter (ODcon) of about 33 mm to about 37 mm, or about 35 mm.Finish 14 may include atop edge 16,cylindrical sidewall 18, and one ormore threads 20.Threads 20 may include abottom thread surface 22.Threads 20 may sometimes include athread stop 24 which may prevent over rotation ofclosure 12 during opening and closing of the container assembly.Closure 12 may include atop panel 26, acylindrical sidewall 28, and a plurality oflugs 38.Top panel 26 may be substantially flat or may be curved as further shown, for example, inFIG. 3 .Top panel 26 may include a raised orcenter portion 30, annularrecessed portion 32, and anannular edge portion 34. In some embodiments,top panel 26 may operate as a vacuum-indicating panel wherein when the container assembly is vented a loss of vacuum pressure may be indicated to a consumer. - In some embodiments,
top panel 26 may be shaped so that theclosure 12 may have an increased degree of flexibility as compared to a level of flexibility accorded if thetop panel 26 was flat. To encourage engagement ofclosure 12 and thefinish 14, atop edge 16 offinish 14 and/or an adjacent or nearby surface offinish 14 may be forced against gasketing material 36 (seeFIG. 3 ) when theclosure 12 is subjected to a downward force as may occur whenclosure 12 is rotated ontofinish 14. For example,threads 20 may be angled downward such that when theclosure 12 is rotated onto thecontainer 10,lugs 38 cooperate withthreads 20 to pull theclosure 12 andcontainer 10 together.Gasketing material 36 may have a thickness D of about 0.9 mm, or other suitable thickness. -
Closure 12 is further shown inFIG. 2A andFIG. 2B .FIG. 2A shows a bottom plan view of theclosure 12.FIG. 2B shows a top plan view ofclosure 12. As shown inFIG. 2A ,closure 12 may include acircular rim 40 at a lower edge ofsidewall 28. Circular rim 40 may help to guide or assist rotation of theclosure 12 oncontainer 10. In some embodiments,circular rim 40 may include four lugs 38. In some embodiments, thelugs 38 may be spaced about equidistant from each other, such as about 90 degrees apart, or thelugs 38 may have other suitable spacing.Closure 12 may be characterized by an inner lug diameter (IDlug). The inner lug diameter refers to the diameter of a circle which intersects the innermost point of each of thelugs 38. The inner lug diameter may be smaller than an inner diameter of the closure (IDcap). The inner diameter of the closure refers to the diameter of a circle defined by the inner surface of therim 40 in regions that do not include thelugs 38. As shown inFIG. 2B ,closure 12 may further be characterized by an outer diameter (ODcap). For example, in some embodiments, the inner lug diameter IDlug may be about 35.3 mm, the inner diameter of the closure IDcap may be about 37 mm, and the outer diameter of the closure ODcap may be about 41.9 mm. - A portion of
closure 12 is shown inFIG. 3 . In some embodiments, theclosure 12 may have an inner diameter IDcap (seeFIG. 2A ) of about 38 mm. For closures that have an inner diameter IDcap of about 38 mm, it had been customary to use a total of three lugs 38. However, in some embodiments described herein, aclosure 12 including fourlugs 38 may exhibit significantly improved performance over the previously used three-lug configurations.Lugs 38 may be characterized by a lug width (W) of about 3.3 mm. The lug width W may be defined herein as the distance between an outer surface ofcylindrical sidewall 28 and an inner side (e.g., inner side ofportions FIGS. 4A-4C ) oflugs 38. In some embodiments, a lug width W may be from about 3.0 mm to about 3.5 mm or about 3.2 mm to about 3.4 mm.Closure 12 may further be characterized by a height (H) and by a dimension (LH) corresponding to the distance between an outer surface of top panel 26 (which may be measured at annular edge portion 34) and top sides (e.g., top sides ofportions FIGS. 4A-4C ) oflugs 38. - As shown in
FIG. 4A , in some embodiments lug 38 may have a generally rounded profile. As shown inFIGS. 4B and 4C , in some embodiments lug 38 may have a profile wherein one or more portions may be flattened. For example, lugprofile 50 ofFIG. 4A is shown to include a roundedlug top portion 58 and a rounded luginner portion 60.Lug profile 54 ofFIG. 4B is shown to include a flattenedtop portion 62 and a flattenedinner portion 64.Lug profile 90 ofFIG. 4C is shown to include a flattenedtop portion 92 and a roundedinner portion 94. Of course, other lug embodiments may include a flattened inner portion and a rounded top portion.Top portions inner portions bottom thread surface 22 andcylindrical side wall 18 offinish 14 whenclosure 12 is engaged withcontainer 10. During engagement, interaction between theclosure 12 and finish 14 may be influenced by frictional interaction between thelugs 38 and either or both of thebottom surface 22 ofthreads 20 and/orcylindrical sidewall 18, which may, at least in part, be influenced by the shape of thelugs 38 and/orthreads 20. - Container assemblies described herein may be used with food and beverage products packaged using either of cold-fill or hot-fill processes. Hot-fill processes may be preferred or necessary for some food and beverage products. For example, hot-filled processes may be used to sterilize some beverage products and may be necessary to achieve a desired product shelf-life. In addition, where a head-space volume is present in a product, following product fill, gas contained in the head-space may cool which may result in a concomitant reduction in the head-space pressure. The resultant vacuum may sometimes be used with vacuum-indicating panels to provide assurance to a consumer that the product has not been tampered with or otherwise inadvertently opened.
- As used herein, a hot-fill process may refer to a process wherein a food or beverage product is treated at a temperature of greater than about 50° C. For example, some hot-fill processes may include heating a food or beverage product to a temperature of greater than or equal to about 60° C., about 65° C., or about 75° C., or about 100° C. Also by way of example, some hot-fill processes may include heating a food or beverage product to a temperature of no greater than about 100° C., about 95° C., or about 90° C. Hot-fill processing may include holding a food or beverage in a holding cell at such elevated temperature for a period of time such as about 10 seconds to about 30 seconds. In some embodiments, following this initial high temperature treatment, a food or beverage product may be at least partially cooled to a still elevated temperature (e.g., such as a temperature of between about 65° C to about 90° C). The food or beverage product may then be added to a container in a fill process and sealed by engaging the container with a closure. In some embodiments, the product fill temperature may be about 82° C. to about 85° C. In some embodiments, the filled container assembly may be maintained at the still elevated temperature for an “in-package” hold step, which may sometimes last for several minutes. The filled container assembly may then be cooled and further processed for distribution.
- Some embodiments described herein may provide particular advantages and solve problems associated with use of thermoplastic containers in hot-fill processes. For example, PET is a thermoplastic that may start to soften at a temperature of about 76° C. Accordingly, in most hot-fill processes suitable for use with a majority of food and beverage products, deformation of PET, as well as some other thermoplastic containers, may occur to at least some degree. This deformation may be problematic for several reasons. For example, proper engagement of
threads 20 and lugs 38 may be disrupted if this deformation is too severe. For example, a removal torque or force necessary to open a container assembly may become highly variable when a thermoplastic is deformed during hot-fill processing. For example, in other container assemblies, some product samples may only be opened by adding an amount of force that is greater than may be readily applied by some consumers. The container assemblies and methods described herein may alleviate or remove this concern. - In some embodiments, by increasing the number of lugs in bottles sized with an opening of about 38 mm from three to four, the force necessary to open a container assembly may be more reproducibly controlled. In addition, in some embodiments, the shape of
lugs 38 and/orthreads 20 may be modified to reduce sample-to-sample variation of a force necessary to open a container assembly. - For example, in some embodiments, one or more sides of the
lugs 38 may be shaped to possess a profile that is more flattened than used in prior lug designs. For example, referring back toFIG. 4B , either or both oftop portion 62 orinner portion 64 oflugs 38 may be flattened. As described herein, a flattened portion of a lug refers to a portion of a lug wherein a radius of curvature of the portion is greater than about 1.5 mm. In some embodiments, one or more lugs may have a flattened top portion characterized by a radius of curvature of greater than about 2.5 mm, about 3.0 mm, or about 3.5 mm, or between about 2.5 mm and about 3.5 mm. In some embodiments, one or more lugs may have a flattened inner portion characterized by a radius of curvature of greater than about 1.5 mm, about 2.0 mm, or about 2.5 mm, or between about 1.5 mm and about 2.5 mm. - In
FIG. 5 , amethod 74 of packaging a food or beverage product using the container assemblies described herein is shown. In a step 76 a food or beverage product may be treated to conditions that include application of high temperature. For example, in methods that include hot-filling of a beverage, a temperature of between about 60° C. to about 100° C. may be applied. Heat may be added with or without application of other forms of energy or pressure suitable to help sterilize or reduce one or more product contaminants such as bacteria. In some embodiments, as shown in astep 78, the food or beverage product may be at least partially cooled. For example, in some embodiments, a trim cooler may be used to reduce the temperature of a food or beverage product. In astep 80, the food or beverage product may be added to a container including a thermoplastic finish. In astep 82, the now filled container may be capped by engaging the container with a metal closure as described herein. In astep 84, the filled and capped container assembly may be held at a hold temperature for a desired hold time. For example, in some embodiments, the filled container assembly may be held at a temperature of about 65° C. to about 90° C. for about 1 minute to about 3 minutes. In astep 86, the filled container assembly may be cooled to make a packaged food or beverage product available for further processing and/or distribution to consumers. - Although the compositions and methods disclosed herein and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufactures, composition, or matter, means, methods and steps described in the specification. Among other things, any feature described for one embodiment may be used in any other embodiment, and methods described and shown in the figures may be combined. Use of the word “include,” “including,” or “having,” for example, should be interpreted as the word “comprising” would be, i.e., as open-ended. As one will readily appreciate from the disclosure, processes, machines, manufactures, compositions of matter, means, methods, or steps presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufactures, compositions of matter, means, methods or steps.
Claims (20)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/590,647 US20170327277A1 (en) | 2016-05-10 | 2017-05-09 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
CA3023937A CA3023937A1 (en) | 2016-05-10 | 2017-05-10 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
EP17796769.2A EP3455143A4 (en) | 2016-05-10 | 2017-05-10 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
PCT/US2017/031973 WO2017196988A1 (en) | 2016-05-10 | 2017-05-10 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
MX2018013796A MX2018013796A (en) | 2016-05-10 | 2017-05-10 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products. |
US16/922,216 US20200385177A1 (en) | 2016-05-10 | 2020-07-07 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
Applications Claiming Priority (2)
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US201662334209P | 2016-05-10 | 2016-05-10 | |
US15/590,647 US20170327277A1 (en) | 2016-05-10 | 2017-05-09 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
Related Child Applications (1)
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US16/922,216 Continuation US20200385177A1 (en) | 2016-05-10 | 2020-07-07 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
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US20170327277A1 true US20170327277A1 (en) | 2017-11-16 |
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Family Applications (2)
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US15/590,647 Abandoned US20170327277A1 (en) | 2016-05-10 | 2017-05-09 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
US16/922,216 Abandoned US20200385177A1 (en) | 2016-05-10 | 2020-07-07 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
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US16/922,216 Abandoned US20200385177A1 (en) | 2016-05-10 | 2020-07-07 | Container assemblies including metal closures and thermoplastic containers and methods of hot-filling food and beverage products |
Country Status (5)
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US (2) | US20170327277A1 (en) |
EP (1) | EP3455143A4 (en) |
CA (1) | CA3023937A1 (en) |
MX (1) | MX2018013796A (en) |
WO (1) | WO2017196988A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111977159A (en) * | 2019-05-23 | 2020-11-24 | 膳魔师(中国)家庭制品有限公司 | Container with cover |
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US20030077333A1 (en) * | 2001-06-04 | 2003-04-24 | Phillips Kenneth M. | Oral Rehydration compositions |
US20120074157A1 (en) * | 2009-05-29 | 2012-03-29 | Crown Packaging Technology, Inc. | Closure assembly |
US20140263155A1 (en) * | 2013-03-15 | 2014-09-18 | Silgan White Cap LLC | Metal closure and seal combination for maintaining the shape of a plastic container neck |
US20150375887A1 (en) * | 2013-01-30 | 2015-12-31 | PLASTIPAK BAWT S.à r I. | An Assembly Comprising a Wide-Mouth Plastic Preform or Container having a Reinforced Neck Finish and a Screwable Closure |
US20170233150A1 (en) * | 2014-08-20 | 2017-08-17 | Crown Packaging Technology, Inc. | Lug closure |
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US1516046A (en) | 1922-04-26 | 1924-11-18 | Nat Seal Company Inc | Closure |
US2063157A (en) * | 1933-06-15 | 1936-12-08 | Hazel Atlas Glass Co | Metal closure for bottles and jars |
US3516565A (en) * | 1967-07-10 | 1970-06-23 | Anchor Hocking Corp | Gasketed metal closure cap |
US4392580B1 (en) * | 1981-07-21 | 1991-04-02 | Closure cap | |
EP1223022B1 (en) * | 1992-05-12 | 2004-11-17 | E.R. Squibb & Sons, Inc. | Method of moulding plastics articles and articles produced thereby |
EP3066017B1 (en) | 2014-04-11 | 2021-11-24 | Silgan White Cap LLC | Metal closure with low pressure engagement lugs |
-
2017
- 2017-05-09 US US15/590,647 patent/US20170327277A1/en not_active Abandoned
- 2017-05-10 MX MX2018013796A patent/MX2018013796A/en unknown
- 2017-05-10 WO PCT/US2017/031973 patent/WO2017196988A1/en unknown
- 2017-05-10 EP EP17796769.2A patent/EP3455143A4/en not_active Withdrawn
- 2017-05-10 CA CA3023937A patent/CA3023937A1/en not_active Abandoned
-
2020
- 2020-07-07 US US16/922,216 patent/US20200385177A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030077333A1 (en) * | 2001-06-04 | 2003-04-24 | Phillips Kenneth M. | Oral Rehydration compositions |
US20120074157A1 (en) * | 2009-05-29 | 2012-03-29 | Crown Packaging Technology, Inc. | Closure assembly |
US20150375887A1 (en) * | 2013-01-30 | 2015-12-31 | PLASTIPAK BAWT S.à r I. | An Assembly Comprising a Wide-Mouth Plastic Preform or Container having a Reinforced Neck Finish and a Screwable Closure |
US20140263155A1 (en) * | 2013-03-15 | 2014-09-18 | Silgan White Cap LLC | Metal closure and seal combination for maintaining the shape of a plastic container neck |
US20170233150A1 (en) * | 2014-08-20 | 2017-08-17 | Crown Packaging Technology, Inc. | Lug closure |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111977159A (en) * | 2019-05-23 | 2020-11-24 | 膳魔师(中国)家庭制品有限公司 | Container with cover |
Also Published As
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MX2018013796A (en) | 2019-08-05 |
WO2017196988A4 (en) | 2018-01-11 |
US20200385177A1 (en) | 2020-12-10 |
EP3455143A4 (en) | 2019-12-18 |
CA3023937A1 (en) | 2017-11-16 |
EP3455143A1 (en) | 2019-03-20 |
WO2017196988A1 (en) | 2017-11-16 |
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