CARTON PACKING

Abstract: A carton packing is configured with a tightly-fitting closing field, which can be torn open, in under a flap cover for re-closing of the opened packing. The closing field is hinged to the same opening edge as the flap cover, and can be torn open along its three remaining edges. The flap cover is configured with a closing tag for snap-locking with a closing edge on a front side field, which is left remaining on the front with the tearing-up of the closing field, and the same closing tag is also suitable for entering into locking engagement with the torn-up closing field, so that this will thereafter form an inside covering on the flap cover. In the initial opening of the carton, the user does not have to dispose of the torn-up closing field and, moreover, the closing field will appear as a security closure as it will be deformed in a permanent manner already with the initial opening.

Description: Carton packing The present invention concerns a carton packing, preferably of medium size, e.g. for accommodating a granulated material with a portion weight of 0.5-2.0 kg. For such cartons, it is generally desirable that they can appear with a form of security closure as well as with a re-use closing in connec-tion with an upper opening part of the packing. It is here-with well-known that the packing can have a flap cover, the lower edge of which can be adjoined with the sides of the packing via a strip part of the carton material which can be torn off, in that the carton items used are preformed with suitable perforations for the defining of such strip zones for tearing up. Such perforations can be undesirable in cases where the contents of the packing in the unopened packing must be kept shielded against the influence of the surrounding atmosphere in a more or less absolute manner. With the occurrence of high demands concerning tightness, it has hitherto been found necessary to connect the opening part of the carton packing with a plastic frame which serves as the basis for a closing membrane part which can be torn up, while there is a re-closing cover piece otherwise belonging to the packing. For the user it is relatively troublesome to effect the relevant first-time openings, among other things because these often involve that a piece which shall be torn open or torn off must be disposed of. With the present invention it is realised that the user can consider it a distinct advantage if a closing piece which can be torn open is arranged in such a manner that, after being torn open, it can remain as an integrated part of the packing, in that it is thus felt that the opening is effected in a more "clean" manner. The invention is based on the consideration that it is possible with simple means to form a carton packing with a flap cover for both the initial opening and the re-closing, and with a carton closing field which, as a flat cover field, extends from the same hinging edge as the flap cover, and which along its three remaining edges is connected with the corresponding three edge areas of the carton opening itself in a manner in which it can be torn open, said closing field thus having projecting parts which are suitable, by the folding-in of the torn-open closing field in the flap cover, for entering into holding engagement with this cover in such a manner that the closing field thereafter appears as a permanent inner covering on the flap cover for folding- up and down together with the cover in subsequent openings and re-closings of the carton. After the tearing-open of the closing field, the user can thus simply press this field up in the flap cover or alternatively fold the flap cover down for closing, whereby the cover will bring along the closing field and enter into holding engagement with this in the closed position, after which the freed closing field will automatically follow up with the cover at the next opening, i.e. the closing field will apparently have disappeared as if by a conjuring trick, in that only to a slight degree does it become visible on the inner side of the flap cover. The holding means for the closing field can well be in holding engagement with the flap cover right from the start, in that they do not need to be able to resist the related tearing-up force in the first opening of the cover. After the tearing free of the closing field, a relatively weak holding engagement is sufficient to establish a coupling together of the parts. It is a possibility, however, that the active holding parts appear as a result of the actual tearing open of the closing field, so that they play no part whatsoever in the first opening of the flap cover, but in all openings after the said tearing open. In connection with the invention it has been found possible to provide a completely tight closure by use of the said closing field as an integrated part of the carton item which forms the body part of the carton. The flap cover will also be able to be configured as an integrated part, but in practice it has proved most expedient to let this cover be a separate part, which with a short downwards-extending web is glued fast to the rear field of the body part along that edge from which the closing field extends. In the following, the invention is explained in more detail with reference to the drawing, in which figs. 1-3 are perspective views for the illustration of the folding-open and the closing of a packing with a preferred embodiment of the invention, and figs. 4,5 and 7 are corresponding views for the illustration of the opening of the packing, while fig. 6 shows the inner side of a flap cover on the packing, and figs. 8-13 show other relevant configurations. The shown packing consists of a body part 2 and a separately-formed cover part 4. In the area down under the upper opening in the body part, this part can be of completely conventional configuration, and for this reason the drawing shows only the upper end of the packing. As shown in fig. 1, the back of the body part is extended upwards in a closing field 6, which via a fold-line continues in an outer field 8 with rounded corner areas 10, and from here towards the middle with downwards-sloping outer edge pieces 12. At the middle there is an outer field 14 defined by perforated side lines. The lateral sides of the body part each have a short web 16 extending up from an opening line 18, which is not an ordinary fold-line, but a cut line half-scored in from the outside which, however, also hereby serves as fold-line. The front field of the body part reaches up to the level of these lines 18, but a short distance below the upper edge of this field there is formed a transverse "half-cut line" 20 corresponding entirely to the lines 18, but not with the view of also forming a fold- line . The cover item 4 has a cover field 22 which downwards is extended with a web 24 for gluing fast to the rear side of the body part, and which at the sides has fields 26 for the formation of downwards-extending cover skirt parts on a flap cover, supplemented with a front field 28 by ordinary corner assemblies. Through a fold-line f, the front field 28 is ex- tended in an outer field 30 with corresponding dimensions, in that in this field there is merely formed an outer, cen- tremost cut-out 32, the bottom edge 34 of which generally lies rather close to the fold-line f, but otherwise extends in a slightly projecting manner along a convex curve with rounded outer corners . In fig. 2 it is shown that the body part is closed by the folding-down of the closing field 6, in that this has hereby been glued fast or welded to the upper side of the folded-in side webs 16, while the outer field part 8 is folded-down and glued to the edge zone of the front field above the half-cut line 20, and at the smaller centre field 14 directly below this zone. The skirt parts on the flap cover are folded up, and the outer field 30 is bent around the fold-line f . Here it must be noted that in connection with this bending there is only carried out a gluing fast of the side parts of the outer field 30 which demarcates the cut-out 32, which - as also described in EP 0593674 - will involve that the curved edge 34, due to the bend tension in the carton material, will be projecting from the field 28 and herewith form a fixed, spatial tag. Fig. 3 shows that after being glued with the strip part 24 to the rear side of the body part, the cover part 4 is closed down over the top of the carton and herewith covers this in a completely "clean" manner. In practice, the top of the packing will be formed in the disclosed manner even before the packing is filled, in that a core block can thus be inserted through the open bottom to provide counter-pressure for the gluing or the weld- ing operations against the various areas of the body part. The packing can then be filled through the open bottom end, which is thereafter closed. In the closing-down of the flap cover 4, the tag edge 34 will grip under the lower edge of the centre piece 14 on the bent-down foremost piece 8 of the closing field 6, whereby a certain holding effect is created on the closed flap cover, i.e. a locking against completely free folding-up or folding-out of this cover. However, this locking can be overcome by exercising a purposeful opening force on the cover, or respectively by a local pressing-in of the front field of the body part directly under the centre of the foremost skirt part of the flap cover. The flap cover can hereby be opened the first time, c . fig. 4. As a result of the front piece 8 of the closing field being glued only along a narrow zone near its upper edge, the corner parts 10 of this front piece will be projecting slightly due to the bending tension in the carton material, and this will already signal to the user that here there are parts which are intended to be gripped and torn open, which can naturally also be communicated by printed instructions on these corner parts. For effective opening of the packing, the user will thus pull the corner parts 10 up and out and hereby bring the closing field 6,8 to the position shown in fig. 5. By this pulling-up, several functions will be effected: 1) The centremost front field part 14, which is glued to the front field of the packing, is left remaining by the pulling-up, in that its surrounding perforation lines are broken, 2) The edge zone above the half-cut line 20 is broken by de- lamination of the carton material itself, 3) The folded-in upper side webs 16 are broken by de- lamination in a corresponding manner, 4) By complete or partial pulling-up, the closing field 6,8 will be sufficiently freed from the body part so that it can not return to its original position thereafter, already because the front field 8, due to the material tension, will "fold out" when its connection with the body part is broken over the half- cut line 20. By an inspection opening of the flap cover, it will therefore be easy to see whether the "security closure" of the packing is intact in the prescribed closed state. An effect corresponding to the points 2) and 3), i.e. a breaking of tight closure connections, will be able to be achieved by means of a welding or gluing between the rele- o o LO O LO rH rH C\] 00 oo M t H - 1 Cn o Ui o On o Ui CO CO t N. ϋi o Cπ O cn o cn Hi 0 μ s; JU hj ft en ft μ- cn J H JU Ω Φ ft Hi 0 h- J ft H μ- 3 Φ |J oo . 3- Φ hi Φ JU hj 3 0 CQ rt Hi μ- φ ft en tr JU M h- 1 O N. IV> h- 1 h- 1 o cn O cn o cn CQ tr 0 $, 3 μ- 3 Hi μ- ιp H 00 JU H hi Φ JU ft • <; tr φ -> o 3 ip cn rt O rt tr Φ X 3 0 s: 3 rt Φ Ω 3" 3 μ- rQ β φ •

Claims: LO o LO o LO o LO rH rH 00 oo where the said local area (14) of the bent-down part of the closing field is fastened.

Inventors: JOERGENSEN-BECK FRODE, LAMBACH HEINRICH WILLIAM, JOERGENSEN-BECK, FRODE, LAMBACH, HEINRICH, WILLIAM
Applicants: JOERGENSEN BECK FRODE, LAMBACH HEINRICH WILLIAM, SCHUR PACKAGING SYSTEMS AS, JOERGENSEN-BECK, FRODE, LAMBACH, HEINRICH, WILLIAM, SCHUR PACKAGING SYSTEMS A/S
Application year: 2000
Main classification: B65D
IPC codes: B65D5