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
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
  • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
• • 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
  • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
  • B65D3/02—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape
  • B65D3/04—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape essentially cylindrical
• • 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
  • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
  • B65D3/10—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure
  • B65D3/12—Flanged discs permanently secured, e.g. by adhesives or by heat-sealing
• • 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
  • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
  • B65D2577/10—Container closures formed after filling
  • B65D2577/20—Container closures formed after filling by applying separate lids or covers
  • B65D2577/2041—Pull tabs
  • B65D2577/205—Pull tabs integral with the closure
• • 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
  • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
  • B65D2577/10—Container closures formed after filling
  • B65D2577/20—Container closures formed after filling by applying separate lids or covers
  • B65D2577/2075—Lines of weakness or apertures
  • B65D2577/2091—Lines of weakness or apertures in cover

Definitions

• This invention relates to a container com ⁇ prising a container body made of a paperboard-based material and comprising a top opening at one end and a bottom opening at the other end; a bottom closing the bottom opening; and a lid for closing the top opening of the container body.
• the body of the container of the ype described above is made of liquid packaging paper- board, such a container can be used, for instance, for packaging various products to be spooned out, such as ice-cream, yoghurt and pudding.
• the lid should be relatively easily and at least substantial ⁇ ly completely detachable. Normally, this is realized in such a way that the body of the container com ⁇ prises an outwardly projecting flange to the upper surface of which an even lid material is seamed.
• This kind of container requires a relatively large space as compared with its useful volume.
• US Patent Specification.4,261,502 and FI Published Spe ⁇ cification 70826 disclose an alternative lid struc ⁇ ture in which a round cup-like lid is inserted into the opening of the body and the edge area of the lid is heat-sealed to the inner surface of the body. This kind of lid is, however, rather difficult to open especially if it 'is to be detached completely.
• US Patent Specification 4,261,502 also discloses a container comprising a conical body closed at the top with a lid made of aluminum foil. This container is formed by a conventional sector-shaped blank called a drink cup blank, and it requires about 15 to 20% more paperboard than a straight-walled container of equal volume.
• the object of the present invention is to pro ⁇ vide a container in which a lid which is easily de ⁇ tachable, also completely, can be attached to a body made of a paperboard-based material.
• a container of the invention which is characterized in that an edge area around the top opening of the body comprises a continuous section having substantially the shape of a truncated cone and extending around and tapering towards the top opening, the generatrix of said body section being at an angle with the generatrix of the container body; and the lid comprises a section having substantially the shape of a truncated cone and the angle of taper of which substantially corresponds to that of the body section having the shape of a truncated cone, said lid section being attached detachably to said body, section.
• the container body section having substantially the shape of a truncated cone refers to a body section which is at an angle with the main part of the body and one end of which is smaller in diameter than the other end.
• the shape of the ends may vary: the ends can be round, oblong, rectangular with rounded corners or even more irregular in shape.
• the container body section having the shape of a truncated cone comprises a -continuous sealing surface extending around the top opening of the container for the lid.
• the thickness of the container body section having the shape of a truncated cone can be equal to one or more material thicknesses of the body. Par ⁇ ticularly advantageously, the thickness of the body section having the shape of a truncated cone is two or more times the material thickness of the body, vhereby the edge of the body around the top opening is folded outwards upon the body. As a result, the edge of the top opening of the container is stiffened and, what is apparently even more important, the cut edge of .the board, i.e. the so-called mill edge, will be positioned outside the container so that the product to be packaged into the container is not able to penetrate inside the board.
• the layers have to be glued together if the outer surface of the container is not of a heat-seal- able material. If the doubled edge is once more fold- ed -outwardly upon the body, the edge area will be threefold, and the plastic-coated inner surface of the container will be positioned against the outer surface of the body, thus enabling heat-sealing.
• a similar multi-layer edge area is also achieved in such way that the edge of the body is first rolled outwards and then flattened and simultaneously heat- sealed against the body.
• Figure 1 shows an exemplifying embodiment of a container body for a container of the invention and two mandrels used for shaping it;
• Figure 2 shows an operational stage at which a narrowed portion V-shaped in cross-section is formed in the edge area of the container body;
• Figure 3 shows an operational stage at which a section having the shape of a truncated cone is ' formed in the edge area of the container;
• Figure 4 illustrates the attachment of a lid to the container body
• Figure . 5 shows a finished container according to one exemplifying embodiment of the invention.
• Figure 1 shows a cylindrical container body 1 of a paperboard-based material.
• a mandrel ' 9- is inserted into the container body 1 through a bottom opening 3 at its one end, and another mandrel 14 is inserted through a top opening 2 of the container body 1.
• the mandrel 9 inserted through the bottom opening 3 of the container body bears on the con ⁇ tainer body 1 at least close to the top opening 2 of the container body before it tapers into a portion 10 having the shape of a truncated cone.
• the mandrel inserted through the top opening 2 bears on the con ⁇ tainer body 1 at the edge of the top opening 2 before it similarly tapers into a portion 15 having the shape of a truncated cone.
• a narrowed portion 11 V- shaped in cross-section can be formed in an edge area 5 around the top opening 2 of the container body ( Figure 1) by means of the portions 10 and 15 of the mandrels 9 and 14, respectively.
• An outer section 12 having the shape of a truncated cone is formed closer to the top opening 2 and a section 13 similarly having the shape of a truncated cone is formed at a greater distance from the top opening 2 in the con ⁇ tainer body by the sides 12 and 13 of the narrowed portion 11, respectively.
• the outer section having the shapp of a truncated cone in the container body 1 can be pressed upon, the inner section having the shape of a truncated cone by means of, for instance, a shaping tool 17 shown in Figure 3, so that a section 6 having the shape of a truncated cone is formed at the edge of the top opening of the con ⁇ tainer body 1.
• the section 6 tapers towards the top opening 2 so that- its- generatrix is at an angle with the generatrix of the body 1.
• the section 6 with the shape of a truncated cone c ⁇ in be forced very accurately into the desired shape between the mandrel 9 and the shaping tool 17.
• the sections 12 and 13, which form the section 6, can be heat-sealed together if the outer surface of the container body is provided with a plastic ' layer. Otherwise they have to be glued together.
• a plane lid 7 provided peripherally with a section 8 having the shape of a truncated cone is positioned above the top opening 2 of the body 1.
• the angle of taper of this section is preferably equal to that of the section 6 of the body 1.
• the lid 7 can now be attached to the body 1, e.g., by heat-sealing the sections 6 and 8 together, e.g., by means of a lid sealing tool 18 shown in Figure 4.
• the sealing can be performed extremely tightly as the mandrel 9 is still positioned within the body 1.
• the lid of the container can be closed very tightly, but the lid is, however, very easily openable as it can be easily subjected to a force which tends to detach it from the section 6 of the body.
• This detachment can be further facilitated by providing e.g. the inner surface of the lid 7, which is to be heat-sealed to the body 1, with a peelable plastic coating.
• the mandrel 9 is removed from within the body 1, whereafter the product to be packaged can, if de ⁇ sired, be introduced into the container body through the bottom opening of the body.
• the container body can also be filled through an opening made in the bottom or in the lid for the purpose, whereby the opening can be separately closeable by means of a closing plug or flap.
• the bottom opening of the con ⁇ tainer is closed either by suitably folding the con ⁇ tainer material or by means of a separate bottom 4 in a manner conventional in the art.
• US Patent Specifi ⁇ cation 4,261,502 discloses ways in which the bottom can be attached to the container body.
• the structure formed by the container body and the lid in accordance with the invention is a new combination of properties of great importance in the packaging technology. Such properties include the completely openable lid, the high ratio between the useful volume and the space requirement of the cont- ainer, savings on packaging material and a new outer appearance different from other containers designed for the same purpose.
• a finished container of the invention is shown ' in Figure 5. As appears from Figure 5, the lid 7 is provided peripherally with a lifting tab 19 which is not heat-sealed to the body 1, so that the lid 7 is easily detachable by pulling the tab 19.
• the lifting tab 19 adjoins an area of the lid 7, which area is separated from the rest of the lid by means of a perforation 20 which penetrates the paperboard layer but not the plastic layer forming the inner surface of the container.
• a perforation 20 which penetrates the paperboard layer but not the plastic layer forming the inner surface of the container.
• the container of the invention and one specific method for producing such a container has been described above mainly by means of one exemplifying embodiment. If it is sufficient that the thickness of the body section having the shape of a truncated cone is equal to the material thickness of the body 1, this section can be formed in the edge of the body 1 either by a shaping tool tsimilar to the tool 17 shown in Figure 3, or by means of a shaping tool similar to the tool 16 of Figure 2, when the mandrel 9 is in ⁇ serted within the body 1 in such a way that the upper edge of its portion 10 having the shape of a trun- cated cone is substantially on a level with the ' edge of the body 1.
• the shape of the body ' 1 may also differ from the cylinder shape shown in the figures.
• the cross-sectional shape of the body may vary relatively arbitrarily, provided that no sharp angles are formed in the edge area of the top opening of the body.
• the manufacturing technique restricts the cross-sectional shape of the body mainly in that the shaping mandrel of the edge area has to be introduced within the body through its bottom opening. Therefore it is not possible that the body becomes broader in the upward direction if it is not possible to widen - the mandrel in one way or an ⁇ other.
• the method of producing the container of the invention is similar to the method described above.

Landscapes

• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Closures For Containers (AREA)
• Packages (AREA)
• Magnetic Record Carriers (AREA)
• Cartons (AREA)
• Diaphragms For Electromechanical Transducers (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
• Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
• Thermally Insulated Containers For Foods (AREA)
• Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
• Devices For Use In Laboratory Experiments (AREA)
• Glass Compositions (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8529396

Family Applications (1)

Country Status (9)

Cited By (4)

Families Citing this family (9)

Citations (7)

Family Cites Families (12)

• 1989
  • 1989-11-22 FI FI895565A patent/FI895565A/fi not_active Application Discontinuation
• 1990
  • 1990-11-16 AU AU66477/90A patent/AU6647790A/en not_active Abandoned
  • 1990-11-16 EP EP90916490A patent/EP0501987B1/en not_active Expired - Lifetime
  • 1990-11-16 AT AT90916490T patent/ATE120702T1/de not_active IP Right Cessation
  • 1990-11-16 ES ES90916490T patent/ES2070339T3/es not_active Expired - Lifetime
  • 1990-11-16 DK DK90916490.7T patent/DK0501987T3/da active
  • 1990-11-16 WO PCT/FI1990/000277 patent/WO1991007325A1/en active IP Right Grant
  • 1990-11-16 DE DE69018478T patent/DE69018478T2/de not_active Expired - Fee Related
  • 1990-11-16 US US07/848,956 patent/US5236120A/en not_active Expired - Fee Related
• 1992
  • 1992-04-15 FI FI921704A patent/FI97358C/fi not_active IP Right Cessation

Patent Citations (7)

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