US20080257945A1 - Interlocking Means for Carton Panels - Google Patents
Interlocking Means for Carton Panels Download PDFInfo
- Publication number
- US20080257945A1 US20080257945A1 US11/816,513 US81651306A US2008257945A1 US 20080257945 A1 US20080257945 A1 US 20080257945A1 US 81651306 A US81651306 A US 81651306A US 2008257945 A1 US2008257945 A1 US 2008257945A1
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- US
- United States
- Prior art keywords
- locking
- toe
- panel
- heel
- apertures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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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
- B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
- B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
- B65D71/12—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers the packaging elements, e.g. wrappers being formed by folding a single blank
- B65D71/14—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers the packaging elements, e.g. wrappers being formed by folding a single blank having a tubular shape, e.g. tubular wrappers without end walls
- B65D71/16—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers the packaging elements, e.g. wrappers being formed by folding a single blank having a tubular shape, e.g. tubular wrappers without end walls with article-locating elements
- B65D71/20—Slits or openings along the fold line of the tubular body
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00129—Wrapper locking means
- B65D2571/00135—Wrapper locking means integral with the wrapper
- B65D2571/00154—Wrapper locking means integral with the wrapper interlocked
- B65D2571/0016—Wrapper locking means integral with the wrapper interlocked by tabs protruding from one end and co-operating with openings at the other end
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00129—Wrapper locking means
- B65D2571/00135—Wrapper locking means integral with the wrapper
- B65D2571/00154—Wrapper locking means integral with the wrapper interlocked
- B65D2571/00172—Wrapper locking means integral with the wrapper interlocked by tabs cut within one end and facing towards the other end when blank is unfolded, and co-operting with openings at the other end
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00246—Locating elements for the contents
- B65D2571/00253—Locating elements for the contents integral with the wrapper
- B65D2571/00277—Slits or openings formed along a fold line
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00432—Handles or suspending means
- B65D2571/00438—Holes
- B65D2571/00444—Holes for fingers
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00648—Elements used to form the wrapper
- B65D2571/00654—Blanks
- B65D2571/0066—Blanks formed from one single sheet
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00123—Bundling wrappers or trays
- B65D2571/00709—Shape of the formed wrapper, i.e. shape of each formed element if the wrapper is made from more than one element
- B65D2571/00716—Shape of the formed wrapper, i.e. shape of each formed element if the wrapper is made from more than one element tubular without end walls
Definitions
- This invention relates to panel interlocking means for securing together a pair of panels, for example, adjacent overlapping panels of a paper-board carton. In some situations, these panels are provided by the opposite ends of a wrapper blank which are brought together and interlocked.
- a similar interlocking means is disclosed in GB 2 400 345 to Paine.
- GB '345 a “heel and toe” locking tab is formed at one end of a wallet and the heel and toe are inserted into separate apertures formed at the other end of the wallet to releasably hold the wallet together.
- the locking tab disclosed in Paine is not wholly pivotal which can made manipulation of the locking tab into the locking aperture difficult.
- each diverging fold line terminates at free edge of the first.
- the angle defined between the diverging fold lines may determine the extent the whole locking tab can pivot relative to the first panel.
- a single locking aperture may be provided into which both the locking toe and locking heel are inserted.
- the one or more locking apertures may be provided with at least one pair of slits extending outwardly from one of said one or more locking apertures, which slits further facilitate the insertion of the locking tab into said one or more locking apertures.
- the locking heel may in part be defined by a substantially semi-circular cut line and in part by arcuate end portions, wherein the arcuate end portions terminate at the divergent fold lines.
- the one or more locking apertures may have a heel-engaging edge, the heel-engaging edge having a slit extending from each end of the heel engaging edge.
- said one or more locking apertures is in part defined by a toe-engaging edge, said toe-engaging edge having a toe engaging edge slit extending from each end of the toe engaging edge to facilitate the insertion of the locking toe ( 60 a ) within said one or more locking apertures.
- the locking toe may be shaped such that it has arcuate shoulder portions and wherein side portions of said one or more locking apertures are similarly shaped to promote easy insertion of the locking toe within said one or more locking apertures.
- the second panel may be provided with a first hinge line, the first hinge line extending between said toe-engaging edge slits to define a first engagement tab between said toe engaging edge slits.
- the centre of the second locking heel lies on the same horizontal axis as the first locking heel and the second locking heel is spaced diagonally from the locking toe such that the centre of the second locking heel lies on different vertical and horizontal axes to the axes on which the centre of the locking toe lies.
- said three locking apertures form a triangular locking aperture arrangement for receiving said first and second locking heels and said locking toe.
- FIG. 2 shows the blank of a wraparound carton having two panels to be locked together, one panel having a locking aperture and the other panel having a locking tab according to a second embodiment of the invention
- a blank 310 for a wraparound carton is provided with first and second bottom panels 328 a and 328 b respectively, which are adapted to be interlocked.
- the panels 328 a and 328 b are disposed at the opposite ends of one and the same wraparound carton blank 310 which is to be formed into a carton sleeve in which panels 328 a and 328 b then provide overlapping, interlocked bottom panels of the carton.
- Second bottom panel 328 b includes a locking tab arrangement which comprises a pair of integral locking heels 360 b , 360 c and an integral locking toe 360 a .
- the locking tab arrangement is hinged to panel 328 b along fold lines 363 , 365 and 367 .
- the fold lines 363 , 365 are positioned on either side of the locking heels 360 b , 360 c respectively and diverge from the locking heels 360 b , 360 c toward an end edge 340 of the second bottom panel 328 b .
- Fold line 367 extends between the adjacent locking heels 360 b , 360 c .
- the angle of the fold lines 363 , 365 relative to the fold line 367 is, in this embodiment, acute so that the fold lines diverge from the locking heels 360 b , 360 c toward the locking toe 360 a.
- the tab 378 beneath lower edge 374 may displace or give inwardly of the aperture 370 a until the locking toe 360 a is pushed inside the aperture 370 a .
- the natural resilience of the paperboard material causes the tab 378 to relax into coplanar alignment with the remainder of the first bottom panel 328 a .
- the locking toe 360 a relaxes into an unfolded position and the shoulder portions 361 abut the inside face of the first bottom panel 328 a thereby interlocking the two bottom panels 328 a , 328 b and forming a composite bottom panel of the carton 330 as shown in FIG. 10 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
Abstract
A panel interlocking arrangement for securing together a pair of panels (28 b, 28 a). The two panels may form overlapping panels of a paperboard carton. The interlocking arrangement comprises a locking tab (60) having a heel (60 b) and a toe (60 a). The locking tab is provided adjacent an end (40) of one (28 b) of the panels and is hinged about its centre to that panel by a pair of divergent fold lines (63, 65). The interlocking arrangement further comprises one or more locking apertures (70) formed in the other (28 a) of the panels. The one or more apertures are shaped in complementary fashion to the locking tab. To lock the panels together, the locking tab is inserted into the one or more apertures. The insertion of the locking tab is facilitated by both the heel and toe of the locking tab being pivotal about the divergent fold lines.
Description
- This invention relates to panel interlocking means for securing together a pair of panels, for example, adjacent overlapping panels of a paper-board carton. In some situations, these panels are provided by the opposite ends of a wrapper blank which are brought together and interlocked.
- Locking tabs which are struck from one end of a carton wrapper and which are arranged to be driven through corresponding apertures, defined by retaining tabs, struck from an opposite end of the wrapper are well known e.g. from U.S. Pat. No. 3,955,748 to Calvert. In US '748 an interlocking means is provided which comprises a locking aperture formed in one end panel and arranged to cooperate with a corresponding locking tab joined to the other end panel, the locking tab comprising an integral locking heel and locking toe, which are arranged to be inserted into the aperture.
- A similar interlocking means is disclosed in U.S. Pat. No. 4,577,799 to Oliff. In US '799 a locking tab is also formed integrally with the locking aperture to engage the toe of the locking tab thereby to aid in holding the locking tab in an interlocked relationship with the locking aperture.
- A similar interlocking means is disclosed in GB 2 400 345 to Paine. In GB '345 a “heel and toe” locking tab is formed at one end of a wallet and the heel and toe are inserted into separate apertures formed at the other end of the wallet to releasably hold the wallet together. The locking tab disclosed in Paine is not wholly pivotal which can made manipulation of the locking tab into the locking aperture difficult.
- The prior art locks are often provided in panels at opposite ends of a wraparound carton and when locked together the panels provide a composite bottom wall of a carton. A locking mechanism for this application is therefore intended only to be locked once to hold the carton in an erected form. If however the carton is required to be opened and reclosed, it is desirable to provide a locking mechanism in an upper or side panel of the carton to facilitate the opening and reclosing of the carton. It is therefore necessary to provide a more durable and efficient lock which can be readily operated by a consumer to open and reclose the carton and whilst providing a secure lock.
- The present invention seeks to avoid or at least mitigate these and other problems of the prior art by providing a locking arrangement which is more durable, reusable and easier to operate.
- According to a first aspect of the invention, there is provided a panel interlocking arrangement of the heel and toe type, for securing together first and second panels of a wraparound carton, the interlocking arrangement comprising a locking tab formed at least in part in said first panel and one or more locking apertures provided in said second panel for receiving the locking tab, the locking tab comprising a locking heel and locking toe characterised in that the locking tab is hinged to the first panel by means of a pair of diverging fold lines extending from the locking heel towards the locking toe, said diverging fold lines predetermine a hinging action between the locking tab and the first panel, to facilitate the insertion of each of the locking toe and heel into said one or more locking apertures thereby to lock the panels together.
- Preferably wherein each diverging fold line terminates at free edge of the first. The angle defined between the diverging fold lines may determine the extent the whole locking tab can pivot relative to the first panel.
- According to a feature of the invention a single locking aperture may be provided into which both the locking toe and locking heel are inserted. The one or more locking apertures may be provided with at least one pair of slits extending outwardly from one of said one or more locking apertures, which slits further facilitate the insertion of the locking tab into said one or more locking apertures. The locking heel may in part be defined by a substantially semi-circular cut line and in part by arcuate end portions, wherein the arcuate end portions terminate at the divergent fold lines. The one or more locking apertures may have a heel-engaging edge, the heel-engaging edge having a slit extending from each end of the heel engaging edge.
- Preferably the arcuate end portions of the locking heel each abut an edge of one of said heel engaging edge slits extending from an upper edge of said one or more locking apertures, when the locking tab is engaged within said one or more locking apertures, to provide a secure lock.
- Preferably said one or more locking apertures is in part defined by a toe-engaging edge, said toe-engaging edge having a toe engaging edge slit extending from each end of the toe engaging edge to facilitate the insertion of the locking toe (60 a) within said one or more locking apertures. The locking toe may be shaped such that it has arcuate shoulder portions and wherein side portions of said one or more locking apertures are similarly shaped to promote easy insertion of the locking toe within said one or more locking apertures. The second panel may be provided with a first hinge line, the first hinge line extending between said toe-engaging edge slits to define a first engagement tab between said toe engaging edge slits.
- Preferably the first engagement tab can hinge about said first hinge line to facilitate the insertion and removal of the locking heel within said one or more locking apertures. The second panel may be provided with a second hinge line extending between each side edge of the aperture and the engagement tab, the second hinge line defining side engagement tabs which are foldable to encourage the insertion of the locking heel within said one or more locking apertures and which aid the secure engagement of the locking tab within said one or more locking apertures.
- Alternatively wherein said one or more locking apertures comprises two locking apertures, one locking aperture for receiving the locking toe and a separate locking aperture for receiving the locking heel.
- Preferably the locking heel may be spaced and offset the locking toe.
- Additionally two locking apertures are disposed in an off set alignment similar to the off set alignment of the locking toe and heel such that the locking toe and heel can be received and held within said two locking apertures to secure the two panels together.
- Preferably the locking heel is spaced diagonally from the locking toe, such that the centre of the locking heel lies on different vertical and horizontal axes relative to the vertical and horizontal axes upon which the centre of the locking toe lies. Additionally the locking tab may comprise a second locking heel and said one or more locking apertures comprise a third locking aperture for receiving said second locking heel.
- Preferably the centre of the second locking heel lies on the same horizontal axis as the first locking heel and the second locking heel is spaced diagonally from the locking toe such that the centre of the second locking heel lies on different vertical and horizontal axes to the axes on which the centre of the locking toe lies. Preferably said three locking apertures form a triangular locking aperture arrangement for receiving said first and second locking heels and said locking toe.
- Additionally the locking tab may comprise a second locking toe and two additional locking heels and said one or more locking apertures may comprise a second locking aperture for receiving the second locking toe and said one or more locking apertures comprise third and fourth locking apertures for receiving said two additional locking heels, together said one or more locking apertures having a trapezoidal arrangement.
- Optionally the or each locking toe projects from a free end edge of the first panel.
- Four exemplary embodiments of the present invention will now be described by way of example with reference to the accompanying drawings in which:
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FIG. 1 shows the blank of a wraparound carton having two panels to be locked together, one panel having a locking aperture and the other panel having a locking tab, according to a first embodiment of the invention; -
FIG. 2 shows the blank of a wraparound carton having two panels to be locked together, one panel having a locking aperture and the other panel having a locking tab according to a second embodiment of the invention; -
FIG. 3 shows the blank of a wraparound carton having two panels to be locked together, one panel having a locking aperture and the other panel having a locking tab according to a third embodiment of the invention; -
FIG. 4A shows a perspective top, front and side view of a carton erected from the blank ofFIG. 1 with the locking tab according to the first embodiment of the invention partly engaged in the locking aperture; -
FIG. 4B shows a perspective top, front and side view of the carton ofFIG. 4A with the locking tab completely engaged in the locking aperture; -
FIG. 4C shows an inside view of the front of the carton ofFIG. 4B illustrating the locking tab engaged in the aperture; -
FIG. 5 is a front view of the locking tab and aperture of the second embodiment of the invention shown in interlocked relationship; -
FIG. 6 is a front view of the locking tab and aperture of the third embodiment of the invention shown in interlocked relationship and -
FIG. 7 is a perspective view of the carton ofFIG. 4B with containers held within the carton. -
FIG. 8 shows the blank of a wraparound carton having a panel interlocking arrangement for locking together two panels, one panel having a locking aperture arrangement and the other panel having a locking tab arrangement according to a fourth embodiment of the invention; -
FIG. 8A shows an enlarged view of one end of the blank of the wraparound carton showing the locking tab arrangement; -
FIG. 8B shows an enlarged view of the other end of the blank of the wraparound carton showing the locking aperture arrangement; -
FIG. 9 shows a first step in the locking of the two panels of the wraparound carton ofFIG. 1 ; and -
FIG. 10 shows the composite bottom panel of the wraparound carrier which is formed by locking the two panels together. - Referring to
FIG. 1 , a blank 10 for forming a wraparound carton is provided with a pair ofpanels Panels panels panels panels locking tab 60 and a lockingaperture 70. - The carton blank 10 is also provided with a series of main panels hinged together in series, which main panels can be folded around a group of articles, such as beverage or food containers C to form a wraparound carton 30 (as shown in
FIG. 7 ). The main panels include atop panel 20 which is hinged on either side to upperbevelled panels second side panel 22 and abottom panel 24. The bevelledpanel 18 a is hinged to theupper side panel 28 b. Thebottom panel 24 is hinged on either side to lower bevelledpanels panel 26 b is hinged to thelower side panel 28 a. The main panels are hinged in series alongfold lines FIG. 1 . - The blank 10 is also provided with a series of upper
article receiving apertures 50 formed in the upperbevelled panels article receiving apertures 50 are each provided withcuts 52 which extend from a lower edge of theaperture 50 into the adjacent upper andsecond side panels cuts 52 allow an upper portion of the containers C, wrapped within thecarton 30, to protrude slightly to encourage a tight fit of the containers C within thecarton 30 and also provide a degree of flexibility which can facilitate the operation of the panel interlocking means i.e. the engagement of thelocking tab 60 within the lockingaperture 70, when the blank 10 is assembled around an article group and acarton 30 formed. A similar array ofarticle receiving apertures 54 are provided in thebottom panels 24 and lowerbevelled panels wraparound carton 30. - Whereas in the embodiments to be described, the panel interlocking means is illustrated with reference to a wraparound carton, this is to serve as an example only, it being understood that there are a variety of carton structures and arrangements in which the panel interlocking means could be employed, all of which will be obvious to one skilled upon reading the following description. Indeed it will also be obvious that the panel interlocking means herein described can be used for interlocking panels formed of foldable sheet material that may or may not be panels of a carton and also that more than one interlocking means could be employed. The remainder of the description therefore focuses upon the panel interlocking means.
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Side panel 28 b includes alocking tab 60 projecting outwardly in the plane of thepanel 28 b from anend edge 40 of that panel. Thelocking tab 60 comprises anintegral locking heel 60 b andintegral locking toe 60 a. Thelocking tab 60 is hinged topanel 28 b alongfold lines locking tab 60, substantially in the middle of the tab, and diverge from the lockingheel 60 b towards the lockingtoe 60 a. The angle of the fold lines 63, 65 relative to theend edge 40 is, in this embodiment less than 180° so that the fold lines diverge from the lockingheel 60 b. The lockingheel 60 b is struck from theside panel 28 b and has aleading edge 66. The lockingheel 60 b is adjoined to thehinge connections arcuate portions 68, whicharcuate portions 68 are so shaped to improve the engagement of the locking tab within the lockingaperture 70. In use thearcuate portions 68 provide a locking edge for cooperation with anedge 72 of the lockingaperture 70. The lockingtoe 60 a has a trailingedge 62 and is shaped in complementary fashion to the lockingaperture 70 such that inuse shoulder portions 61 of the lockingtoe 60 a provide a locking edge for cooperation with the edge ofslits aperture 70. -
Panel 28 a includes the lockingaperture 70 which is formed in complementarily fashion to the shape of thelocking tab 60. The lockingaperture 70 is defined in part by alower edge 74, opposite side edges 76 and anupper edge 72 whichupper edge 72 cooperates with thearcuate portions 68 of the leadingedge 66. The locking aperture is provided with a series of radially or outwardly extending pairs ofslits 73 a/73 b, 75 a/75 b and 77 a/77 b. Slits ornicks upper edge 72 to assist the insertion of the lockingtoe 60 b into the lockingaperture 70. Side slits 77 a, 77 b extend outwardly from the side 76 of the lockingaperture 70 and are positioned and angled such that upon insertion of thelocking tab 60 into the lockingaperture 70, the side slits 77 a, 77 b define edges which may be abutted by theshoulder portions 61 of the lockingtoe 60 a. Finally, theslits lower edge 74 and in part define a tab between theslits lower edge 74. Which tab is, to some degree, flexible to allow that portion of thelower side panel 28 a immediately beneath thelower edge 74 to move inwardly and outwardly relative to the remainder of thelower side panel 28 a to facilitate the locking an unlocking of the panel interlocking means. - To construct the
carton 30 from the blank 10, the main panels are sequentially folded aboutfold lines lower side panels panels locking tab 60 is pivoted about the angled or divergingfold lines 63 65. The divergingfold lines tab 60 andupper side panel 28 b. - The predetermined hinging action facilitates the pivoting of locking
tab 60 such thatlocking tab 60 is folded substantially perpendicular position relative to thelower side panel 28 a. In this way, the leadingedge 66 of the lockingtoe 60 b can be inserted into the lockingaperture 70 by sliding the lockingtoe 60 b againstupper edge 72. The shaped side edges 76 of the lockingaperture 70 encourage the lockingtoe 60 b to engage the upper edge of theaperture 70. This is illustrated inFIG. 4A , wherein the lockingtoe 60 b is inserted by rotating thelocking tab 60 about the fold lines 63, 65 until thelocking tab 60 abuts thelower side panel 28 a and the lockingheel 60 b can be pushed no further. - The locking
heel 60 a is then rotated aboutfold lines toe 60 b abuts an inside face of thelower side panel 28 a. The lockingheel 60 a then overlies a lower portion of the lockingaperture 70. The locking tab is again rotated about the fold lines 63, 65 but in the opposite direction to the first rotation thereby to accommodate the insertion of the lockingheel 60 a. - Again the diverging
fold lines locking tab 60 in the reverse direction to facilitate the insertion of the lockingheel 60 a. Theshoulders 61 of the lockingheel 60 a can then be pushed past the side edge 76 of the lockingaperture 70, assisted by the slight inward displacement of the portion of thelower side panel 28 a between slits 77 a, 75 a and 77 b, 75 b. Thelower edge 62 of the lockingheel 60 a is also pushed past thelower edge 74 of the locking aperture. The tab beneathlower edge 74 may displace or give inwardly of theaperture 70 until the locking heel is pushed inside theaperture 70. The natural resilience of the paperboard material causes the tab beneathlower edge 74 and the portion of thelower side panel 28 a, betweenslits lower side panel 28 a. - Furthermore the locking
heel 60 a relaxes into an unfolded position and abuts the inside face of thelower side panel 28 a thereby interlocking the twoside panels carton 30 as shown inFIGS. 4B and 7 . A view illustrating the inside face of the interlocked upper andlower side panels FIG. 4C . InFIG. 4C dotted lines are used to illustrate parts of the interlocking means which are on the outside of the carton and hence cannot actually be seen from the inside view of the carton. It can also be seen from the view inFIG. 4A that the portions of thelower side panel 28 a between theslits 73 a/76 a and 73 b/76 b overlap a central portion of thelocking tab 60. - The
locking tab 60 is prevented from sliding with respect to thelower side panel 28 a by virtue of the shape of thelocking tab 60 andaperture 70 and the arrangement ofslits arcuate portions 61 abut theupper edge 72, thearcuate portions 61 and juxtaposedslits lower side panels lower side panels end edge 40 may abut an edge created by the side slits 77 a,77 b. In this way a durable and secure interlock is formed. - Second, third and fourth embodiments of the present invention are shown in
FIGS. 2 , and 5, 3 and 6 and 8-10 respectively. Like reference numbers are used to identify panels and features which are similar to those of the first embodiment, albeit the numbers are raised by a factor of 100, 200 and 300 to distinguish between embodiments. Since the subsequent embodiments share similar features to the first embodiment only differences will be described in detail. - In the second embodiment shown in
FIG. 2 , an exemplary wraparound carton is again used to illustrate how the interlocking means might be used. In this embodiment side slits 77 a, 77 b are replaced by a weakenedarcuate arrangement nick lines slits side edge aperture 170 thereby defining engagingtabs tabs lower side panel 128 a along the weakenedlines lines shoulder portions 161 to assist in the engagement of the lockingheel 160 a within theaperture 170. This is so because theengagement tabs lower side panel 128 a since they are hinged about the weakenedlines locking heel 160 a readily to push past theengagement tabs lower side panel 128 a. Thus a durable and strong interlocking mechanism is provided.FIG. 5 shows a front view of the interlockedpanels - The third embodiment is illustrated in
FIGS. 3 and 6 . In this embodiment, the lockingaperture 270 has side edges 276 a and 276 b which haveshoulder portions heel 260 a. The similar shaping of theaperture 270 and lockingheel 260 a enables thelocking tab 260 to be more easily inserted into theaperture 270. Additionally a weakened arcuate line is provided between theslits tab 281. The weakenedline 279 provides a more definite hinge by which thetab 281 can be folded when the lockingheel 260 a is inserted and removed from the lockingaperture 270 to lock and unlock thepanels - The fourth embodiment of the invention will now be described.
- Referring to
FIG. 8 , a blank 310 for a wraparound carton is provided with first and secondbottom panels panels panels - The
carton blank 310 is provided with a series of main panels hinged together in series, which main panels can be folded around a group of articles, such as bottles (B) to form a wraparound carton. The main panels include atop panel 323 which is hinged on either side toupper side panels lower side panels bevelled panels bottom panel 328 a is hinged to lowerbevelled panel 326 b and thebevelled panel 326 b is in turn hinged to thelower side panel 324. The secondbottom panel 328 b is hinged to the lowerbevelled panel 318 a, which is in turn hinged to thelower side panel 320. The main panels are hinged in series alongfold lines FIG. 8 . - The blank 310 is also provided with a series of upper
article receiving apertures 350 formed in theupper side panels - Second
bottom panel 328 b includes a locking tab arrangement which comprises a pair of integral lockingheels integral locking toe 360 a. The locking tab arrangement is hinged topanel 328 b alongfold lines heels heels end edge 340 of the secondbottom panel 328 b. Foldline 367 extends between the adjacent lockingheels fold lines fold line 367 is, in this embodiment, acute so that the fold lines diverge from the lockingheels toe 360 a. - The locking
heels bottom panel 328 b and are shaped similarly to those of the earlier embodiment. Nevertheless it is envisaged that the locking heels could take a different form, providing that the lockingapertures bottom panel 328 a are complementarily shaped. In use thearcuate portions 368 provide a locking edge for cooperation withedges apertures toe 360 a has a trailingedge 362 and is shaped in complementary fashion to a lockingaperture 370 c which is also formed in the firstbottom panel 328 a. The lockingtoe 360 a is shaped such thatshoulder portions 361 are provided. Theshoulder portions 361 are arranged to co-operate with outwardly extendingside slits aperture 370 a. - The first
bottom panel 328 a comprises a locking aperture arrangement which includes lockingapertures heels toe 360 a. - Turning to the details of the locking aperture arrangement, the locking
aperture 370 a is defined in part by alower edge 374, opposite side edges 376 and an upper edge 372 which upper edge 372 cooperates with thearcuate portions 368 of the leading edge 366 of the lockingtoe 360 a when the bottom panels 320 a, 320 b are interlocked. The lockingaperture 370 a is provided with a radially or outwardly extending pair ofslits 377 a/377 b that are positioned and angled such that upon insertion of the lockingtoe 360 a into the lockingaperture 370 a, the side slits 377 a, 377 b define edges which may be abutted by theshoulder portions 361 of the lockingtoe 360 a. Additionally, slits 375 a, 375 b extend from thelower edge 374 and in part define atab 378 between theslits lower edge 374. Thetab 378 is, to some degree, flexible to allow thatportion 378 of the firstbottom panel 328 a, immediately beneath thelower edge 374, to move inwardly and outwardly relative to the remainder of the firstbottom panel 328 a to facilitate the locking and unlocking of the lockingtoe 360 a within the lockingaperture 370 a. The twofurther apertures bottom panel 328 a are each defined by anarcuate edge 384 a, 384 b and acurvilinear edge apertures respective locking heel heel corresponding locking aperture - To construct a carton from the blank 310, the main panels are sequentially folded about
fold lines carrier 330 and thetop panel 323 is placed on top of the bottles, the upper side panels and the upper andlower side panels lower side panels side panels b bottom panels carrier 330. - In order to lock together
panels fold lines bottom panel 328 a as illustrated inFIG. 9 . From this position, the leading edges 366 of each lockingheel corresponding locking aperture heels edges - The locking tab arrangement is then rotated about
fold lines bottom panel 328 a and into co-planar overlapping relationship. The lockingtoe 360 a then overlies a lower portion of the locking aperture 370 and the lockingheels bottom panel 328 a. Theshoulders 361 of the lockingtoe 360 a can then be pushed past theupper edge 374 of the lockingaperture 370 a, assisted by the slight inward displacement oftab 378. Theleading edge 362 of the lockingtoe 360 a is also pushed past thelower edge 374 of the lockingaperture 370 a. Thetab 378 beneathlower edge 374 may displace or give inwardly of theaperture 370 a until the lockingtoe 360 a is pushed inside theaperture 370 a. The natural resilience of the paperboard material causes thetab 378 to relax into coplanar alignment with the remainder of the firstbottom panel 328 a. Furthermore the lockingtoe 360 a relaxes into an unfolded position and theshoulder portions 361 abut the inside face of the firstbottom panel 328 a thereby interlocking the twobottom panels carton 330 as shown inFIG. 10 . - The locking tab arrangement is prevented from sliding with respect to the
lower side panel 328 a by virtue of the shape of the locking toe andheels apertures slits curvilinear edges arcuate portions 368 and curvilinear ends 383 a, 385 a are oppositely angled thereby forming a strong and secure engaging edge when the first andsecond panels bottom panels - In this embodiment the locking
toe 360 a and lockingheels apertures toe 360 a lies on horizontal and vertical axes spaced and offset from the horizontal and vertical axes spaced and offset from the horizontal and vertical axes upon which the centre of each lockingheel heels line 367. - The diverging
fold lines 63, 65 (163, 165, 263, 265, 363, 365) provide a hinge about which the locking tab 60 (160, 260) can pivot. In contrast to prior art mechanisms wherein locking tabs hinge about a straight fold line, by utilising divergent fold lines which extend from the locking heel, toward the locking toe at an angle relative to a notional line normal to the end of the toe (i.e. in line with 367), the pivotal movement of the locking tab in the present invention is more greatly controlled. The hinging action is predetermined by the angle of the divergent fold lines, which can be optimised such that the whole locking tab is permitted to pivot sufficiently out of the plane of said panel to facilitate its insertion into the locking aperture but restricted by the divergent fold lines from folding further i.e. 180° back into coplanar alignment with that panel. The divergent folds effectively introduce a degree of resilience which encourages the locking tab to return to its natural unfolded position, thus introducing a “snapping” effect, where upon inserting the tab into the aperture the heel locks or “snaps” into a locked position behind the panel in which the locking aperture is formed. - It can be appreciated that various changes may be made without departing from the scope of the present invention, for example, the size and shape of the locking tab and locking aperture may be adjusted to accommodate panels of differing size or shape, providing that the lock and aperture are sized in complementary fashion to one another. Other variations may also be made within the scope of the invention. For example the size, shape, position of the
fold lines 363, 365 (and 367) may be altered providing that the locking tab can still pivot or rotate about the hinged connection to assist the insertion of the locking tab into the locking aperture. It will also be apparent that the interlocking mechanism of the present invention could be applied to a variety of cartons and its application is not limited to a wraparound carton. It is also clear that the locking aperture and tab could be formed from opposite ends of a unitary blank, or indeed from two separate panels. - It is also envisaged that the locking mechanism of the present invention may contain only one locking heel provided in an offset position relative to the locking toe, the heel and toe to be received in separate apertures. It is also envisaged that for larger carriers or other applications of the panel interlocking means that the locking tab arrangement could comprise more than one locking toe and more than two locking heels. The locking toe to locking heel ratio may or may not be 1:2, for example in a carrier containing a row of 4 bottles, the locking tab arrangement may comprise two locking toes offset and intermediate a series of three locking heels. In this case the locking aperture arrangement would comprise five apertures arranged in a substantially trapezoidal form.
- It will also be recognised that as used herein, any reference to hinged connection should not be construed as necessarily referring to a single fold line only; indeed it is envisaged that hinged connection can be formed from one or more of the following, a score line, a frangible line or a fold line without departing from the scope of the invention.
Claims (22)
1. A panel interlocking arrangement for securing together first and second panels of a carton, the interlocking arrangement comprising a locking tab formed at least in part in said first panel and one or more locking apertures provided in said second panel for receiving the locking tab, the locking tab comprising a locking heel and a locking toe, wherein the locking tab is hinged to the first panel by a pair of diverging fold lines extending from the locking heel towards the locking toe whereby hinging action between the locking tab and the first panel is predetermined to facilitate the insertion of each of the locking toe and heel into said one or more locking apertures to lock the panels together.
2. A panel interlocking arrangement according to claim 1 wherein each of said diverging fold lines terminates at a free edge of the first panel.
3. (canceled)
4. A panel interlocking arrangement according to claim 1 wherein said one or more locking apertures comprises a single locking aperture into which both the locking toe and locking heel are inserted.
5. A panel interlocking arrangement according to claim 1 wherein said one or more locking apertures are provided with at least one pair of slits extending outwardly from said one or more locking apertures so that the insertion of the locking tab into said one or more locking apertures is facilitated.
6. A panel interlocking arrangement according to claim 1 wherein the locking heel is in part defined by a substantially semi-circular cut line and in part by arcuate end portions, wherein the arcuate end portions terminate at the divergent fold lines respectively.
7. A panel interlocking arrangement according to claim 6 wherein said one or more locking apertures have a heel-engaging edge, the heel-engaging edge having a slit extending from each end of said heel engaging edge.
8. A panel interlocking arrangement according to claim 7 , wherein the arcuate end portions of the locking heel each abut an edge of a respective one of said heel engaging edge slits when the locking tab is engaged within said one or more locking apertures.
9. A panel interlocking arrangement according to claim 1 wherein said one or more locking apertures is in part defined by a toe-engaging edge, said toe-engaging edge having a toe engaging edge slit extending from each end of the toe-engaging edge to facilitate the insertion of the locking toe into said one or more locking apertures.
10. A panel interlocking arrangement according to claim 1 wherein the locking toe is shaped such that the locking toe has arcuate shoulder portions and wherein side portions of said one or more locking apertures are shaped similarly to the shoulder portions respectively to promote easy insertion of the locking toe into said one or more locking apertures.
11. A panel interlocking arrangement according to claim 9 wherein the second panel is provided with a first hinge line, the first hinge line extending between said toe-engaging edge slits to define a first engagement tab between said toe engaging edge slits.
12. A panel interlocking arrangement according to claim 11 , wherein the first engagement tab is hingedly connected to the second panel along said first hinge line to facilitate the insertion and removal of the locking toe into and from said one or more locking apertures.
13. A panel interlocking arrangement according to claim 9 wherein the second panel is provided with a side hinge line extending between each side edge of the one or more locking apertures and an adjacent one of the toe engaging edge slits, the side hinge lines defining side engagement tabs which are foldable to encourage the insertion of the locking toe into said one or more locking apertures and which aid the secure engagement of the locking tab within said one or more locking apertures.
14. A panel interlocking arrangement according to claim 1 wherein said one or more locking apertures comprises two locking apertures for receiving the locking toe and the locking heel respectively.
15. A panel interlocking arrangement according to claim 14 wherein the locking heel is spaced and offset from the locking toe.
16. A panel interlocking arrangement according to claim 15 wherein the two locking apertures are disposed in an offset alignment similar to the offset alignment of the locking toe and heel such that the locking toe and heel can be received and held within said two locking apertures to secure the two panels together.
17. A panel interlocking arrangement according to claim 15 wherein the locking heel is spaced diagonally from the locking toe such that the centre of the locking heel lies on different vertical and horizontal axes relative to the vertical and horizontal axes upon which the centre of the locking toe lies.
18. A panel interlocking arrangement according to claim 14 wherein the locking tab comprises a second locking heel and said one or more locking apertures comprises a third locking aperture for receiving said second locking heel.
19. A panel interlocking arrangement according to claim 18 wherein the centre of the second locking heel lies on the same horizontal axis as the first locking heel and wherein the second locking heel is spaced diagonally from the locking toe such that the centre of the second locking heel lies on different vertical and horizontal axes to the axes on which the centre of the locking toe lies.
20-21. (canceled)
22. A panel interlocking arrangement according claim 1 wherein the locking toe projects from a free end edge of the first panel.
23. A carton comprising a series of main panels including first and second panels which are secured together by a panel interlocking arrangement, the interlocking arrangement comprising a locking tab formed at least in part in said first panel and one or more locking apertures provided in said second panel for receiving the locking tab, the locking tab comprising a locking heel and a locking toe,
wherein the locking tab is hinged to the first panel by a pair of diverging fold lines extending from the locking heel towards the locking toe.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0503423.6 | 2005-02-18 | ||
GB0503423A GB0503423D0 (en) | 2005-02-18 | 2005-02-18 | Interlocking means for carton panels |
GB0516599.8 | 2005-08-12 | ||
GB0516599A GB0516599D0 (en) | 2005-08-12 | 2005-08-12 | Interlocking means for carton panels |
PCT/US2006/006343 WO2006089305A1 (en) | 2005-02-18 | 2006-02-18 | Interlocking means for carton panels |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080257945A1 true US20080257945A1 (en) | 2008-10-23 |
Family
ID=36603567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/816,513 Abandoned US20080257945A1 (en) | 2005-02-18 | 2006-02-18 | Interlocking Means for Carton Panels |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080257945A1 (en) |
WO (1) | WO2006089305A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014227184A (en) * | 2013-05-21 | 2014-12-08 | 凸版印刷株式会社 | Carton |
US20170057717A1 (en) * | 2014-05-05 | 2017-03-02 | Westrock Packaging Systems, Llc | Panel interlocking device for a carton and blank therefor |
JP2021535048A (en) * | 2018-08-22 | 2021-12-16 | ウエストロック・パッケージング・システムズ・エルエルシー | Article heel receiving mechanism in cartons and cartons and blanks for cartons |
US20220135302A1 (en) * | 2019-02-12 | 2022-05-05 | Westrock Packaging Systems, Llc | Panel interlocking device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0715904D0 (en) | 2007-08-15 | 2007-09-26 | Meadwestvaco Packaging Systems | Locking means for carton and blank therefor |
WO2010104812A1 (en) | 2009-03-11 | 2010-09-16 | Meadwestvaco Packaging Systems, Llc | Wraparound article carrier having a bottom retention feature |
JP7106280B2 (en) * | 2017-11-14 | 2022-07-26 | アサヒビール株式会社 | blanks for cartons and cartons |
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GB2276610A (en) * | 1993-04-01 | 1994-10-05 | Crest Cartons Ltd | Wraparound carton holder |
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Cited By (5)
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JP2014227184A (en) * | 2013-05-21 | 2014-12-08 | 凸版印刷株式会社 | Carton |
US20170057717A1 (en) * | 2014-05-05 | 2017-03-02 | Westrock Packaging Systems, Llc | Panel interlocking device for a carton and blank therefor |
US10099833B2 (en) * | 2014-05-05 | 2018-10-16 | Westrock Packaging Systems, Llc | Panel interlocking device for a carton and blank therefor |
JP2021535048A (en) * | 2018-08-22 | 2021-12-16 | ウエストロック・パッケージング・システムズ・エルエルシー | Article heel receiving mechanism in cartons and cartons and blanks for cartons |
US20220135302A1 (en) * | 2019-02-12 | 2022-05-05 | Westrock Packaging Systems, Llc | Panel interlocking device |
Also Published As
Publication number | Publication date |
---|---|
WO2006089305A1 (en) | 2006-08-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MEADWESTVACO PACKAGING SYSTEMS, LLC, VIRGINIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AUCLAIR, JEAN-MICHEL;REEL/FRAME:020274/0918 Effective date: 20071112 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |