US20040238548A1 - Container and method for manufacturing thereof - Google Patents

Container and method for manufacturing thereof Download PDF

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Publication number
US20040238548A1
US20040238548A1 US10/486,515 US48651504A US2004238548A1 US 20040238548 A1 US20040238548 A1 US 20040238548A1 US 48651504 A US48651504 A US 48651504A US 2004238548 A1 US2004238548 A1 US 2004238548A1
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US
United States
Prior art keywords
hollow body
container
wafer
sealing means
flange
Prior art date
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Abandoned
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US10/486,515
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English (en)
Inventor
Ake Rosén
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Individual
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Individual
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Publication of US20040238548A1 publication Critical patent/US20040238548A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • B65D1/06—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents with closable apertures at bottom
    • 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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/02—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved with means for heating the material prior to forming
    • 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
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/06—Integral, or permanently secured, end or side closures
    • B65D17/12—Closures secured by soldering, welding, or otherwise uniting opposed surfaces
    • B65D17/14—Closures secured by soldering, welding, or otherwise uniting opposed surfaces by cold or hot pressing of plastic sealing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
    • B29K2709/10—Mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical

Definitions

  • the present invention relates to a container and a method for producing the same, and more specifically a container comprising a hollow body extended along a longitudinal axis and thermoformed from a sheet- or web-shaped hollow body material, a sealing means and an opening means, said hollow body defining, together with the sealing means, a compartment which can be made to communicate with the surroundings by opening of said opening means, the hollow body being essentially cylindrical or in the form of a truncated cone and having a closed first end and an opposite open second end.
  • Containers of the type described by way of introduction are normally used as disposable containers for liquid foodstuffs.
  • the type of container is easy to produce from a relatively inexpensive material. It is also possible to reuse the material included in the container.
  • a container of this type is disclosed in SE508002.
  • the container described therein comprises a hollow body, which can be made, for example, by thermoforming from a sheet material containing polypropylene with a suitable filler.
  • the hollow body has an open rear side, through which the hollow body can be filled with contents. Subsequently the container is sealed by applying a rear cover over said open rear side.
  • the top plane of the hollow body is provided with an opening device. By suitable angling of the top plane and the bottom plane, respectively, relative to a front plane of the hollow body, a hollow body with a large opening is obtained, through which filling is allowed while the deep drawing ratio of worked surface to drawing depth can be reduced.
  • the prior-art container is not without drawbacks. On the one hand it is relatively expensive to produce and, on the other, it is complicated to provide it with an external decorative print. Finally, it cannot be used for carbonated foodstuffs.
  • a further container of the type described by way of introduction is known from DE19950514.
  • the container described therein comprises a thermoformed hollow body with a closed, bottom-forming end and an opposite open end, over which a sealing means is applicable.
  • a gripping means and a pouring duct are formed in connection with the open end to facilitate opening of the container by removing the sealing means, which thus also forms the opening means of the container, and to facilitate pouring of contents held in the container.
  • This container is well suited for viscous food products but is probably not suitable for food products such as fruit juice or milk.
  • the container should be user-friendly and also be suited for food products of low viscosity, such as fruit juice or milk.
  • the container should be easy to produce, and it should also be possible to produce it at a relatively low cost.
  • the container should also be able to hold carbonated contents.
  • a container comprising a hollow body extended along a longitudinal axis and thermoformed from a sheet- or web-shaped hollow body material, a sealing means and an opening means.
  • the hollow body defines, together with the sealing means, a compartment which can be made to communicate with the surroundings by opening of said opening means.
  • the hollow body is essentially cylindrical or in the form of a truncated cone and has a closed first end and an opposite open second end.
  • the container is characterised in that said opening means is arranged in or in connection with the first end of the hollow body, and that said sealing means covers the second end of the hollow body and thus forms a bottom of the container.
  • a dimensionally stable and user-friendly container which can produced at an extremely low cost.
  • the rounded shape of the hollow body makes it possible to reduce its wall thickness while at the same time the risk of deformation of the container filled with contents is significantly reduced.
  • the hollow body By the hollow body being thermoformed, it can be made of a laminated hollow body material, thereby making it possible to give the hollow body the desired properties as regards, for instance, rigidity and permeability to gas.
  • the container can be made extremely stable since the bottom-forming sealing means is arranged over the open second end of the hollow body.
  • the hollow body of the container is, perpendicular to said longitudinal axis, essentially circular in cross-section.
  • a rotationally symmetrical hollow body is provided, which can easily be provided with a decorative print.
  • the hollow body of the container is, perpendicular to said longitudinal axis, essentially elliptic in cross-section. This means that a container can be provided which is extremely comfortable to hold.
  • the hollow body of the container is essentially in the form of a truncated cone, its narrow end forming the first end of the hollow body. This makes each hollow body easy to produce by a thermoforming process while at the same time the completed hollow bodies can be stacked.
  • the first end advantageously has essentially the form of a semisphere.
  • the hollow body is advantageously made of a material having at least one core layer comprising a filler of mineral material and a binder of polyolefin material.
  • Said sealing means preferably forms a wafer which is made of a wafer material.
  • the sealing means is advantageously made of a material comprising a filler of mineral material and a binder of polyolefin material.
  • the wafer has according to a preferred embodiment a central elevation directed towards said compartment and adapted to constitute a bottom of champagne bottle type.
  • a flange encompasses the second end of the hollow body, with which flange the sealing means is connected.
  • the sealing means can have a circumferential flange which is designed complementarily to the flange of the hollow body and connected thereto.
  • said hollow body has an internal rim portion and said sealing means has a circumferential flange which is designed complementarily to said rim portion and connected thereto, said flange connecting at an angle to the radially inwardly located part of the sealing means.
  • the sealing means advantageously consists of a wafer, with a central elevation to form a bottom of champagne bottle type, the angled flange ensuring a reliable connection of the sealing means to the hollow body.
  • Said opening means advantageously is resealable.
  • the opening means of the container has a tear-off tab, which preferably wholly or partly is defined by a tear initiation, along which the material included therein has been heat-treated to cause a material weakening in the form of, for instance, embrittlement.
  • the opening means of the container comprises a screw cap assembly.
  • a method for producing a container filled with contents being characterised by the steps of thermoforming, from a sheet- or web-shaped hollow body material having at least one core layer comprising a filler of mineral material and a binder of polyolefin material, a hollow body extended along a longitudinal axis and being essentially cylindrical or elliptic and having a closed first end and an opposite open second end, arranging an opening means of the hollow body in or in connection with its first end, supplying contents to the hollow body through the second end thereof, and applying a wafer over the second end of the hollow body for surrounding the contents in a compartment defined by said hollow body and said wafer, said wafer forming a bottom of the container.
  • the step of arranging said opening means is carried out integrally with the step of thermoforming said hollow body.
  • said hollow body is thermoformed in a form in which a wall portion supports a screw cap with an internal thread, whereby an externally threaded projection, engaging the internal thread of the screw cap, of said screw cap assembly is thermoformed in said screw cap in connection with the step of thermoforming said hollow body.
  • FIG. 1 is a cross-sectional view of a first embodiment of an inventive container.
  • FIGS. 2 a - 2 c illustrate schematically the method for producing a hollow body for the container shown in FIG. 1.
  • FIGS. 3 a - 3 b are perspective views which illustrate the method for filling the hollow body produced in FIGS. 2 a - 2 c.
  • FIGS. 4 a - 4 c are perspective views which illustrate the method for applying a sealing means on a filled hollow body to form a preferred second embodiment of an inventive container.
  • FIGS. 5 a - 5 b illustrate schematically the method for producing a hollow body for the container shown in FIG. 4 c.
  • FIGS. 6 a - 6 c are perspective views which illustrate the method for applying a sealing means on a filled hollow body to form a preferred third embodiment of an inventive container.
  • FIG. 7 illustrates schematically the method for producing a hollow body for the container shown in FIG. 6 c.
  • FIG. 8 is a schematic, partly sectional side view of a container according to a fourth embodiment of the present invention.
  • FIG. 1 illustrates a first embodiment of an inventive container 1 .
  • the container comprises a hollow body 2 , an opening means 3 and a sealing means 4 .
  • the hollow body 2 is of a form which is rotationally symmetrical about a longitudinal axis 5 and thus is, perpendicular to said longitudinal axis 5 , essentially circular in cross-section.
  • the hollow body need not necessarily have a rotationally symmetrical shape and thus can also be given a cross-section, which is, for instance, essentially elliptic, which in some cases may be desirable for producing a container which is more comfortable to hold.
  • the hollow body 2 is essentially in the form of a truncated cone. It will however be appreciated that the hollow body can also be given an essentially cylindrical form.
  • the narrow end of the hollow body 2 forms a closed first end 6 and the wide end of the hollow body 2 forms an open second end 7 opposite to the first end 6 .
  • the first end 6 has been given an essentially semispherical shape, but it will be appreciated that said first end 6 can also be shaped in some other manner.
  • the hollow body 2 carries a flange 8 which encompasses the second end 7 .
  • the sealing means 4 is in the shown embodiment designed in the form of a wafer 9 , which is applied over the open second end 7 of the hollow body 2 .
  • the wafer 9 has a circumferential flange 10 which is designed complementarily to the flange 8 of the hollow body 2 and is formed of the periphery of the wafer 9 and which is made to abut against the flange 8 of the hollow body 2 and is connected therewith, for instance by a sealing operation in which said flanges 8 , 10 are made, by heat treatment, to sealingly adhere to each other.
  • said hollow body 2 defines together with said wafer 9 a compartment 11 , the wafer 9 forming a bottom 12 of the inventive container 1 .
  • the opening means 3 is arranged in or in connection with the first end 6 of the hollow body 2 .
  • the opening means 3 is arranged in said first end 6 of the hollow body 2 and integrally formed therewith. More specifically, the openings means 3 consists of a projection 13 which is extended from said first end 6 of the hollow body 2 and in which a duct 14 is formed which communicates with the compartment 11 . The end of the projection 13 facing away from the compartment 11 is sealed in the non-open state of the container 1 .
  • the opening means 3 forms in its open state a connection between the compartment 11 and the surroundings.
  • Both the hollow body 2 and the sealing means 4 are preferably made of a laminate material with a core layer comprising a filler of mineral material and a binder of polyolefin material.
  • a filler of mineral material e.g. chalk, talc and mica.
  • FIGS. 2 a - 2 c illustrate the method for producing a hollow body 2 for the container 1 shown in FIG. 1.
  • FIG. 2 a illustrates an extruder unit 15 , by means of which a web-shaped hollow body material 16 is produced. It will be appreciated that said web- or sheet-shaped hollow body material 16 can also be obtained in other ways, such as in rolls.
  • Said hollow body material 16 consists, as mentioned above, advantageously of a laminate material with a core layer containing a filler of mineral material in the form of chalk, talc and/or mica and a binder of polyolefin material.
  • the web-shaped hollow body material 16 is passed to a forming station 17 . If the hollow body material 16 is obtained in rolls, an intermediate heat treatment station (not shown) is required to heat the hollow body material 16 to a temperature at which it is formable. Optionally, such a heat treatment station can also be necessary in connection with extrusion of the web-shaped hollow body material 16 to ensure that this is kept at a temperature which is sufficient for the subsequent forming.
  • the forming station 17 comprises a forming means 18 and a stamping means 19 .
  • the forming means 18 comprises a cavity 20 , into which a stamp 21 of the stamping means 19 is insertable. It will be appreciated that the forming means 18 may comprise a plurality of such cavities, in which case the stamping means 19 may comprise a corresponding number of stamps.
  • the web-shaped hollow body material 16 is passed to the forming station 17 so that part thereof is applied over the cavity 20 of the forming means 18 .
  • FIG. 2 b illustrates how the stamp 21 of the stamping means 19 is inserted into the cavity 20 , whereby a hollow body 2 is formed in the hollow body material 16 by thermoforming.
  • the stamp 21 supports a cutting means 22 , which engages the hollow body material 16 and thus releases the hollow body 2 from the thus formed web-shaped material as retained.
  • a thus released hollow body 2 is illustrated in FIG. 2 c.
  • the cutting means 22 can be designed in such manner that the hollow body 2 remains connected with said material retained at a limited number of points to allow the subsequent release of the hollow body 2 from the material retained by a small degree of force being applied to the hollow body 2 .
  • said hollow body 2 can also be thermoformed in other manners. For instance, it is possible to apply a pressure above atmospheric on the side 23 of the web-shaped hollow body material 16 facing away from said cavity 20 , whereby the hollow body material is pressed into the cavity 20 for thermoforming of said hollow body 2 . Correspondingly, it is also possible to apply a subatmospheric pressure in the cavity 20 , whereby the hollow body material 16 is sucked into the cavity 20 . Finally, it is also possible to combine these methods in a suitable way.
  • hollow bodies 2 Owing to the hollow body 2 having the form of a truncated cone where the narrow end 6 is directed downwards in the cavity 20 of the forming means 19 , easy removal of the thermoformed hollow body 2 is allowed.
  • the thus produced hollow bodies 2 are also stackable, whereby such a stack of hollow bodies 2 can form a space-saving magazine, from which a filling machine (not shown) obtains hollow bodies 2 for producing filled containers 1 according to the present invention. It will further be appreciated that thus stacked hollow bodies can be transported in a very space-saving manner from producer to user.
  • the opening means 3 arranged in or in connection with the first end 6 of the hollow body 2 can be formed in connection with the thermoforming of the hollow body 2 or in a subsequent operation.
  • FIGS. 3 a - 3 b illustrate the method for filling the hollow body 2 described with reference to FIG. 1.
  • the hollow body 2 is oriented in such manner that its open second end 7 is directed upwards, after which filling can be made with the aid of a filling means 24 through said open second end 7 .
  • the hollow body 2 is filled with liquid foodstuff contents.
  • liquid foodstuff contents is meant liquid products such as milk as well as viscous products such as yoghurt.
  • the sealing means 4 in the form of a wafer 9 as shown in FIG. 1 is applied over the open second end 7 of the hollow body 2 to form the container 1 shown in FIG. 1.
  • FIGS. 4 a - 4 c illustrate a method for applying a sealing means 4 over the open second end 7 of a hollow body 2 filled with contents, to form a preferred second embodiment of an inventive container 1 .
  • the sealing means 4 consists of a circular wafer 9 which has a circumferential flange 10 , which is designed complementarily to a flange 8 surrounding the open second end 7 of the hollow body 2 .
  • FIG. 4 b the wafer 9 has been applied over said open second end 7 , so that the flange 10 of the wafer 9 has been made to abut against and then adhere to the flange 8 of the hollow body 2 .
  • FIG. 4 c illustrates the completed container 1 .
  • the first end 6 of the hollow body 2 is turned upwards.
  • the wafer 9 applied over the second end 7 of the hollow body 2 thus forms a bottom 12 of the container 1 .
  • this embodiment of the container 1 comprises an opening means 3 which is arranged in connection with the first end 6 of the hollow body 2 and which is in the form of a tear-off tab 25 .
  • the tab 25 is partly defined by a tear initiation 26 and comprises a gripping means 27 .
  • a user grasps the gripping means 27 and tears up the tab 25 along said tear initiation 26 .
  • FIGS. 5 a - 5 b illustrate a manner in which said tear-off tab 25 can be made.
  • the cavity 20 in which said hollow body 2 is thermoformed, has a recess 28 formed in a wall portion.
  • a pressure above atmospheric is applied on the side 23 of the hollow body material 16 facing away from the cavity 20 , which is indicated by means of arrows P 1 , whereby said gripping means 27 is formed on the circumferential surface of the hollow body 2 .
  • a tear-initiating means 29 is inserted into the hollow body 2 in the cavity 20 .
  • a tear initiation 26 is produced which wholly or, like in the embodiment shown in FIG. 5 c, partly defines a portion of the circumferential surface of the hollow body 2 , said portion comprising said gripping means 27 and thus forming the tear-off tab 25 .
  • the tear-initiating means 29 carries a heating means 30 of a shape corresponding to the extent of the tear initiation 26 .
  • the heating means 30 of the tear-initiating means 29 is made to abut against the hollow body 2 , whereby the heating means 30 causes a weakening in the form of a material embrittlement over the distance along which it makes contact with the hollow body 2 . This distance thus corresponds to said tear initiation 26 .
  • the material embrittlement caused in the tear initiation 26 in combination with the gripping means 27 of the tab 25 , allows easy opening of the container 1 .
  • said material weakening can also be provided in other ways, for instance by thinning of the material. It should be mentioned that a hollow body material comprising a filler of chalk and a binder of polyolefin can be made to have excellent tearing properties.
  • FIGS. 6 a - c illustrate one more preferred, third embodiment of the inventive container 1 . More specifically, the method is shown for applying a sealing means 4 over the open second end 7 of a hollow body 2 filled with contents, to form the preferred third embodiment of the container 1 .
  • the sealing means 4 consists of a wafer 9 with a circumferential flange 10 which is designed complementarily to a flange 8 which surrounds the open second end 7 of the hollow body 2 .
  • FIG. 6 b the wafer 9 has been applied over said open second end 7 , so that the flange 10 of the wafer 9 has been made to abut against and then adhere to the flange 8 of the hollow body 2 .
  • the wafer 9 has been given such a shape as to form in the completed container 1 a bottom 12 of champagne bottle type. More specifically, the wafer 9 comprises a central elevation 31 which extends towards the compartment 11 of the container 1 . As a result, it will be possible to hold carborated contents, such as beer, lemonade or aerated water, in the container 1 without it being deformed owing to the pressure above atmospheric in the container 1 . Of course, also the rotationally symmetrical form of the hollow body 2 contributes to counteracting deformation of the filled container 1 .
  • FIG. 6 c illustrates the completed container 1 and, as is evident, the container 1 comprises an opening means 3 which is arranged at a first end 6 of the hollow body 2 and comprises a screw cap assembly 32 .
  • the cavity 20 of the forming means 18 has a hole 33 formed in a wall portion. More specifically, the hole 33 is located in a position corresponding to the centre of the hollow body 2 at said first end 6 .
  • An internally threaded screw cap 34 is arranged in the hole 33 .
  • a pressure above atmospheric is applied on the side 23 of the web-shaped hollow body material 16 facing away from the cavity 20 , which is indicated by arrows P 2 , whereby an externally threaded projection 35 is thermoformed at the first end 6 of the hollow body 2 , the screw cap 34 acting as a mould.
  • the screw cap 34 may comprise cutting means (not shown), which act to open the end of said projection 35 facing the screw cap 34 , in connection with unscrewing of the cap 34 .
  • said end of the projection 35 can be opened in an operation following the thermoforming of the hollow body 2 .
  • a mandrel-like means on the outside of the screw cap facing away from the container. To open the projection 35 , the screw cap is unscrewed, after which it is turned for applying said mandrel-like means to the closed end of the projection 35 .
  • Said mandrel-like means can be surrounded by an internally threaded sleeve, in which case the projection is opened by screwing on said sleeve.
  • FIG. 8 illustrates a fourth embodiment of an inventive container 1 .
  • the container 1 is, like the one described with reference to FIGS. 6 a - c, intended for carborated contents, and therefore the sealing means 4 in the form of a wafer 9 has a central elevation 31 extending towards the compartment 11 of the container 1 to form a bottom 12 of champagne bottle type.
  • the wafer 9 has an upwards angled circumferential flange 37 which is designed complementarily to an internal rim portion 38 of the hollow body 2 .
  • the flange 37 abuts against and adheres, for instance by a hot sealing method, to said rim portion 38 . This results, between the wafer 9 and the hollow body 2 , in an extremely strong connection which in an advantageous fashion can withstand a pressure above atmospheric in the compartment 11 of the container 1 .
  • the wafer 9 which forms a bottom 12 of champagne metal type can be formed in such manner that it initially has an elevation directed away from the compartment 11 of the container 1 .
  • said elevation is pressed inwards so as to be made to extend in the opposite direction, thereby achieving a clamping effect that fixes the wafer 9 and facilitates the subsequent sealing operation.
  • the sealing means 4 which is described with reference to the various embodiments and is in the form of a wafer 9 is produced in a suitable manner. It goes without saying that it is especially possible to produce the wafer 9 described with reference to said third embodiment of the container 1 by a thermoforming process. Said wafer 9 can, of course, also be made by an injection moulding process or by a punching operation.
  • a container 1 and a method for producing the same are thus provided.
  • the inventive container 1 comprises a hollow body 2 of a form which is preferably rotationally symmetrical about a longitudinal axis 5 , an opening means 3 and a sealing means 4 .
  • the hollow body 2 defines together with the sealing means 4 a compartment 11 for liquid contents.
  • the opening means 3 is arranged at a closed first end 6 of the hollow body 2 and forms in its open state a connection between the compartment 11 and the surroundings.
  • the sealing means 4 is applied over an open second end 7 opposite to the first end 6 and forms, in its state applied on the hollow body 2 , a bottom 12 of the inventive container 1 .
  • the circumferential surface of the hollow body 2 is easy to provide with a decorative print, which is indicated at 36 in FIGS. 4 c and 6 c.
  • the rounded form of the container 1 makes it possible to reduce the consumption of material which is necessary for a given volume.
  • the rounded form further ensures that the wall thickness of the hollow body 2 can be minimised without any risk of deformation of the container 1 filled with contents.
  • the fact that the hollow body is formed by thermoforming makes it possible to produce extremely small wall thicknesses.
  • the wall thickness is preferably in the range 50-300 ⁇ m.
  • the inventive container 1 is thus easy to provide with a print 36 and can simultaneously be produced with a minimum of consumed material. All in all, this means that an aesthetically pleasing container 1 can be produced at an extremely low cost.
  • both the hollow body 2 and the sealing means are made of a material comprising a filler of mineral material, preferably chalk, and a binder of polyolefin material.
  • the raw material price of such a mineral-filled polyolefin material is also relatively low, which further promotes the production of an inexpensive container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Packages (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Closing Of Containers (AREA)
  • Closures For Containers (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
US10/486,515 2001-08-22 2002-08-21 Container and method for manufacturing thereof Abandoned US20040238548A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0102789A SE519704C2 (sv) 2001-08-22 2001-08-22 Förpackning samt metod för framställning därav
SE0102789-5 2001-08-22
PCT/SE2002/001499 WO2003018411A1 (en) 2001-08-22 2002-08-21 Container and method for manufacturing thereof

Publications (1)

Publication Number Publication Date
US20040238548A1 true US20040238548A1 (en) 2004-12-02

Family

ID=20285087

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/486,515 Abandoned US20040238548A1 (en) 2001-08-22 2002-08-21 Container and method for manufacturing thereof

Country Status (11)

Country Link
US (1) US20040238548A1 (sv)
EP (1) EP1419093A1 (sv)
KR (1) KR20040027918A (sv)
AU (1) AU2002325453B2 (sv)
BR (1) BR0211971A (sv)
CA (1) CA2455892A1 (sv)
MX (1) MXPA04001673A (sv)
PL (1) PL367962A1 (sv)
SE (1) SE519704C2 (sv)
TW (1) TW579355B (sv)
WO (1) WO2003018411A1 (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070048409A1 (en) * 2004-02-16 2007-03-01 Eros Bettini Container for liquid food products and procedure for packaging said liquid food products
US10688748B2 (en) * 2013-03-14 2020-06-23 Milacron Llc Techniques to mold parts with injection-formed aperture in gate area
WO2022195289A3 (en) * 2021-03-19 2022-10-27 Bg Research Ltd An apparatus and associated methods for thermal cycling

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917267A (en) * 1986-11-12 1990-04-17 Laverdure Roland J A Self-closing valve with tamper evident lip seal tab for liquids, pastes or solids
US5058801A (en) * 1990-04-16 1991-10-22 Cin-Made Corporation Composite can
US5191988A (en) * 1989-12-02 1993-03-09 Tetra Pak Holdings S.A. Pack with peripheral seam for flowable contents
US5609266A (en) * 1992-10-16 1997-03-11 Yoshino Kogyosho Co., Ltd. Refilling container having flexible shoulder portion movable between subsided and extended positions
US5654051A (en) * 1993-04-29 1997-08-05 Tetra Laval Holdings & Finance S.A. Packaging material and packaging containers produced therefrom
US5782376A (en) * 1995-05-25 1998-07-21 General Mills, Inc. Thermoformed plastic containers and their method of manufacture
US6116440A (en) * 1996-11-01 2000-09-12 Colgate - Palmolive Company Resealable thermoformed container
US20040104513A1 (en) * 2001-07-03 2004-06-03 Canino Paul Allen Paper package with injection-molded plastic seams and handle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347681A1 (de) * 1983-01-06 1984-07-12 Cosden Technology, Inc., Wilmington, Del. Verfahren zur herstellung eines behaelters
DE3607211A1 (de) * 1986-03-05 1987-09-10 Merklinghaus Horst Verpackungsbehaelter, insbesondere becher, napf oder dergleichen, aus kunststoffmaterial sowie verfahren zu seiner herstellung
DE19950154A1 (de) * 1999-10-19 2001-04-26 Bosch Gmbh Robert Thermogeformter Behälter und Vorrichtung zum Formen eines solchen Behälters

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917267A (en) * 1986-11-12 1990-04-17 Laverdure Roland J A Self-closing valve with tamper evident lip seal tab for liquids, pastes or solids
US5191988A (en) * 1989-12-02 1993-03-09 Tetra Pak Holdings S.A. Pack with peripheral seam for flowable contents
US5058801A (en) * 1990-04-16 1991-10-22 Cin-Made Corporation Composite can
US5609266A (en) * 1992-10-16 1997-03-11 Yoshino Kogyosho Co., Ltd. Refilling container having flexible shoulder portion movable between subsided and extended positions
US5654051A (en) * 1993-04-29 1997-08-05 Tetra Laval Holdings & Finance S.A. Packaging material and packaging containers produced therefrom
US5782376A (en) * 1995-05-25 1998-07-21 General Mills, Inc. Thermoformed plastic containers and their method of manufacture
US6116440A (en) * 1996-11-01 2000-09-12 Colgate - Palmolive Company Resealable thermoformed container
US20040104513A1 (en) * 2001-07-03 2004-06-03 Canino Paul Allen Paper package with injection-molded plastic seams and handle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070048409A1 (en) * 2004-02-16 2007-03-01 Eros Bettini Container for liquid food products and procedure for packaging said liquid food products
US10688748B2 (en) * 2013-03-14 2020-06-23 Milacron Llc Techniques to mold parts with injection-formed aperture in gate area
WO2022195289A3 (en) * 2021-03-19 2022-10-27 Bg Research Ltd An apparatus and associated methods for thermal cycling

Also Published As

Publication number Publication date
SE0102789D0 (sv) 2001-08-22
KR20040027918A (ko) 2004-04-01
PL367962A1 (en) 2005-03-07
CA2455892A1 (en) 2003-03-06
MXPA04001673A (es) 2004-05-31
AU2002325453B2 (en) 2005-03-24
BR0211971A (pt) 2004-09-21
SE0102789L (sv) 2003-02-23
WO2003018411A1 (en) 2003-03-06
SE519704C2 (sv) 2003-04-01
TW579355B (en) 2004-03-11
EP1419093A1 (en) 2004-05-19

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