EP1093433B1 - Case and cardboard blank with tearaway wall - Google Patents

Case and cardboard blank with tearaway wall Download PDF

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Publication number
EP1093433B1
EP1093433B1 EP00936970A EP00936970A EP1093433B1 EP 1093433 B1 EP1093433 B1 EP 1093433B1 EP 00936970 A EP00936970 A EP 00936970A EP 00936970 A EP00936970 A EP 00936970A EP 1093433 B1 EP1093433 B1 EP 1093433B1
Authority
EP
European Patent Office
Prior art keywords
flap
case
cut
line
wall
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.)
Expired - Lifetime
Application number
EP00936970A
Other languages
German (de)
French (fr)
Other versions
EP1093433A1 (en
Inventor
Jean-Yves Bacques
Gérard Mathieu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otor SA
Original Assignee
Otor SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR9907579A external-priority patent/FR2795051B1/en
Priority claimed from FR9915704A external-priority patent/FR2802179B1/en
Application filed by Otor SA filed Critical Otor SA
Publication of EP1093433A1 publication Critical patent/EP1093433A1/en
Application granted granted Critical
Publication of EP1093433B1 publication Critical patent/EP1093433B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/54—Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing
    • B65D5/5405—Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing for opening containers formed by erecting a blank in tubular form
    • B65D5/542—Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing for opening containers formed by erecting a blank in tubular form the lines of weakness being provided in the container body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/54—Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/142—Cutting, e.g. perforating, punching, slitting or trimming using presses or dies
    • 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
    • B65D2301/00—Details of blanks
    • B65D2301/10—Blanks mutually positioned to minimise waste material upon cutting out the individual blank from a continuous or large sheet

Definitions

  • the present invention relates to a box cardboard or corrugated cardboard packaging from a blank of one piece and comprising a removable wall.
  • the present invention aims to provide a blank and a box responding better than those previously known to the requirements of practice especially in this that it authorizes the complete removal of the packaging by a few simple movements allowing a perfect presentation on the shelves in stores.
  • the invention allows mounting in automatic at high speed (over twenty cases / min), the cases obtained having a great strength and also being easily stackable on pallets.
  • the present invention provides in particular a box made of a sheet of cardboard or corrugated cardboard, according to claim 1. To do this, there are provided junction lines between the wall formed by a removable panel and the other adjacent panels (bottom, cover, and adjacent side walls) fully precut.
  • junction line between two panels a panel being formed by a shutter or a or several flaps of the blank, a line of junction consisting of a few attachment points or fasteners between the two panels, which makes the two panels easily removable from each other, by tearing the line of junction by combining a traction perpendicular to the line and a progressive detachment of the points one after the other.
  • the precut junction lines are thus arranged to exhibit good resistance in the sense of the line, and / or as long as a primer tearing has not started.
  • a hard point makes it possible to avoid a beginning of tearing on either side of the line and / or in the middle.
  • frangible portion that does not holds only by a few points or parts of attachment with the rest of the blank and that is why easily detachable from the blank, by pulling perpendicular to the plane of the blank (some Newtons, for example from 5 to 10 N).
  • the precut portion and / or the lines precut are arranged to present a good resistance in the vertical direction as long as the forces are mainly exercised in the plane of the walls. This resistance is particularly sufficient for allow the transport of products even if the packaging is gripped by the upper part.
  • the precut lines are obtained by perforating the dotted cardboard with cutting blades called “perforating nets”.
  • the dotted lines are therefore defined by an alternation regular perforated lines called “cutters” and non-perforated lines called “attachment points”.
  • the distance between two attachment points in other words the cutting length, is called D1
  • the distance between two nets sharp in other words the length of a point of attachment, is called D2.
  • a perforating profile is thus commonly designated by a series of two digits corresponding to D1 and D2, separated by a point.
  • the values D1 and D2 are always constant on the same cutting line.
  • an 8.3 net will consist of a alternating cutouts 8 mm long and attachment points 3 mm long.
  • the route followed by the dotted lines also serve as a fold line
  • the nets also have a so-called “creasing", that is to say that between the perforations, the attachment points are crushed by more deep to facilitate subsequent folding around the line concerned.
  • the perforating blades are generally made of steel, and are embedded over part of their height in a wooden form which ensures their rigidity to lateral deformations during pressurization on the cardboard to be cut.
  • the difficulty in choosing a net is to select the one which allows to obtain a grubbing up easy, fast and clean by the operator while avoiding accidental breakage of attachment points by any other cause.
  • the present invention therefore proposes to create lines of variable junction on the same length of thread perforating, this taking advantage of the fact that the couple of tear applied to the area to be torn is variable depending on the angle between the force applied and the wall with the dots of attachment, and that the energy transmitted to the point of attachment is a function of the speed at which is applied the movement.
  • variable resistance zones are obtained by varying the distances D1 and D2 on the same net.
  • the invention thus also provides a case packing in cardboard sheet or corrugated cardboard comprising a removable wall provided with lines of partially precut junction forming a net having cut portions of length D1 separated two by two by attachment points length D2, characterized in that at least one of the lengths D1 and D2 varies along said thread.
  • the invention also provides a case packaging formed from a single blank in sheet material of cardboard or corrugated cardboard, comprising a first vertical wall connected by connecting lines to the bottom and top walls and to the adjacent side walls of the body, characterized in that said joining lines are precut and in that the vertical wall opposite the first wall is integral with the wall from the bottom through at least a portion frangible precut separable by simple traction and / or one or more bonding points manually removable by simple pull.
  • the portion (s) partially precut and / or the point (s) collage are arranged to present good resistance in the vertical direction, i.e. so that the efforts are exerted essentially in the wall plan.
  • the separation force exerted between walls is certainly perpendicular to the walls, these then dissociate easily manually, without delamination of the cardboard, for example with a force of the order of 5 to 10 Newtons, advantageously and for example after passing a hard point requiring an additional effort of some Newtons from the user, using for example his thumb as a foil and / or lever arm to pass this hard point.
  • the box retains its rigidity, which does not allow spreading or yawning that promotes risk tear initiation, moreover advantageously still prevented by the hard point mentioned above.
  • a cutting blade for sheet material cardboard or corrugated cardboard including a net having cutting portions of length D1 separated two by two by hollow portions of length D2, characterized in that at least one of the lengths D1 and D2 varies along said thread.
  • the invention also provides a blank allowing to obtain the cash register as described above.
  • the invention also provides a blank in terms of sheet of cardboard or corrugated cardboard for manufacture of a packing case, according to claim 17.
  • Figure 1 shows a blank 1 of corrugated cardboard double-sided, for example 3 mm thick.
  • the blank is made up of a series of four rectangular shutters 2, 3, 4 and 5 interconnected by lines of folding.
  • the suite includes a first flap 2 intended to form a side wall of the body, connected by a first junction line 6, confused with a fold line between shutters, at a second part 3 intended to form the bottom of the cash register, and respectively by a second line 7 and a third junction line 8 also forming fold lines with two adjacent flaps 10 and 11, rectangular or substantially rectangular.
  • the first part 2 is also connected to a third rectangular flap 4, by a fourth junction line 9 consisting of a shaped line hat.
  • Line 9 straddles the line of folding 12, parallel and located on the side opposite the fold line 6 to form the opposite edge of the checkout.
  • the suite includes a fourth rectangular shutter intended to form the wall of the body opposite to the first wall 2.
  • Each of the first, second, third and fourth junction lines (6, 7, 8, 9) are precut according to the invention.
  • junction line 9 makes it possible to determine two rectangular or trapezoidal parts 13 and 14, of flap, located on either side of a portion central 15 in trapezoidal shape, straddling the line and having a part located on the third part 4, terminated by an opening or recess 16 made in said third flap intended to form the top of the body.
  • Line 15 therefore has a shape of ⁇ or cap.
  • the recess is for example rectangular and / or triangular, and allows the user to pass a or more fingers to tear off the first wall formed by the first flap 2.
  • Each of components 3, 4 and 5 also includes on both sides and in the extension of the two flaps 10 and 12 of the first part 2, flaps rectangular or substantially rectangular, respectively 17, 18; 19, 20 and 21, 22 specific to cooperate once the body is formed with the flaps of the first flap so as to form side walls openwork opposite of the body.
  • the second 3 part comprises on the opposite side to the first part a set 23 of three flaps rectangular or substantially rectangular, with know a central flap 24 connected to the second flap by a fold line 25 and two small flaps end 26 connected respectively by lines folding 27 located in the extension or substantially in line with the line of folding 25, to the two side flaps 17 and 18 of the second part 3.
  • These two side flaps 17 and 18 include to them each and respectively, on the side of the first flap 2, a frangible portion precut 28, 29 along an open line with one side 30, 31 fully exposed to the outside of the flaps of a part and towards the first part on the other hand.
  • the fourth part 5 includes on its outer edge 32 located on the side opposite the third flap 4 a frangible portion precut 33, by example rectangular or trapezoidal, specific to cooperate with the central flap 24 of the second flap 3.
  • This precut portion 33 is extended towards the part 5 by a hollowed out part 34 in said fourth flap 5, for gripping the wall, to allow a easy removal once the blank is shaped form a package.
  • FIGS 2 and 3 show other embodiments of the flaps of the second part 3 according to the invention.
  • Figure 2 thus shows a second flap 3 provided two side flaps 17 'and 18', each fitted with a end flap 26.
  • the two flaps 17 'and 18' are each provided with two partially pre-cut 35 and 36, 37 and 38, rectangular or substantially rectangular, symmetrical two by two relative to the longitudinal axis 39 of the blank.
  • Portions 35 and 37 are located at the end flaps directed to the first flap 2 and are free on three sides.
  • the portions 36 and 38 are located on the side of the other end of the flaps and are free in two sides, which allows to save a part 39, 40 in withdrawal in the flap 17 ', 18' towards the flap 3.
  • Figure 3 shows another embodiment 17 '', 18 '' flaps of the second part 3 according to the invention.
  • Each flap has two portions pre-cut 28 'and 29', of the type of parts 28 and 29 described with reference to Figure 1, and two others pre-cut parts 41 and 42, free only on the side merged with the outer edge of the flap.
  • the flaps 17 '', 18 '' do not have small end flaps.
  • Load 48 is introduced laterally into the packaging, as shown in 49, then the flaps side intended to form the side walls of the body are folded down after pre-gluing for example with hot-melt glue, in particular portions 28, 29 partially precut, so as to form the body as shown at the end of training in 50.
  • the box is then transported and brought by example in a supermarket.
  • the wall formed by the first flap 2 is then torn off (step 51) manually by a user, what the latter can easily do given pre-cut junction lines, then packaging is put on the shelf (not shown).
  • the lower part 52 forming the bottom is uncoupled at the level of the precut portions 28, 29 by spreading outwards in the direction of arrow 53 (step 54).
  • the shovel-shaped bottom 52 is then extracted by below, by the user who retains them manually pushing the top or part upper 55 of the body and the load 48.
  • FIG. 5 shows a set 56 of blanks 1, 1 ′, 1 '' as described with reference to Figure 1, which can be easily made from the same width of cardboard, continuous.
  • Pre-cut junction lines 6, 7, 8, 9 or for connecting pre-cut portions 28, 29, 33 are obtained by punching the dotted cardboard with perforating spinning cutting blades.
  • the dotted lines are therefore defined by a alternating perforated lines and non-perforated lines perforated so-called attachment points.
  • a perforating profile is therefore defined by the two digits corresponding to D1 and D2.
  • Figure 6 shows another embodiment of blanks 57, 57 'recessed in opposition, manufactured in continuous from the same width of cardboard.
  • the first flap 58 here has two flaps 59 and 60, symmetrical with respect to the longitudinal axis 61 blank and each formed by a first part rectangular and a second trapezoidal part or substantially triangular of greater height that the first part located on the side of the third flap 62 and directed towards the outside of the blank.
  • the flaps 63, 64 of the second part intended for form the bottom of the package are small flaps rectangular located on the periphery of said second shutter.
  • the two side flaps 63 are extended by a small tongue 65, the central flap 64, end, being for example the same width as the side flaps 63.
  • the third part 62 and the fourth part 66 each have two large sides rectangular or substantially rectangular flaps 67, 68, intended to form when they are glued between them, and with the flaps of the first and second shutters, the other two side walls of the checkout.
  • the blank 1 is not pre-cut as described with reference to Figure 4, but brought to flat (step 70).
  • Load 71 can either be pistoned (no mode shown), or brought laterally on the blank (step 72), before folding the blank around packaging by coating as presented in 73, the load resting on top of the package or third part 4.
  • the packaging is then finished as shown in 74 in Figure 7, the flaps 10, 11; 21, 22, then 17, 18, 19, 20 being folded down after gluing, the second part 3 suitable for forming the bottom of the packaging, being folded over the load, its flap end center 24 being glued to the portion pre-cut 33 of the fourth part 25 as indicated in 75.
  • FIG. 8 another mode of production of a blank 80 according to the invention comprising a first flap 81 connected by first, second, third and fourth junction lines 82, 83, 84, 85 respectively to a second part 86, a third part 87 and a fifth part 88, the second part 86 being intended to form the bottom of the body and being by example identical to the second part described in reference to figure 1.
  • the third and fifth parts 87, 88 are meanwhile located on either side of the first flap 81, with which they are connected by second and third pre-cut junction lines confused with the fold lines, the fourth junction line 85 being on horseback with a folding line 89 of junction with a flap rectangular 90 to form identical portions in portions 13, 14, 15 and a recess identical to the recess 16 in the blank of FIG. 1.
  • a fourth flap 91 is provided at the end of the fifth part 88 and includes the pre-cut portion 92, identical to the portion 33 according to the invention, which will be glued to the end flap 93 of the second part.
  • the fourth part also has a tab end 94 of bonding with the third flap 87 (or conversely the tab can be on the third part and sticks to the fourth) each third, fourth and fifth parts comprising a substantially rectangular flap, 95, 96, 97 of the same width as the flap of the first flap and which are intended to form the top of the body.
  • the flaps 95 and 97 are symmetrical with respect to the first part 81 and include for example a offset at the angle located on the side of the flap 90 of the first flap, complementary in shape to the portion 15.
  • FIG. 9 shows the formation of a box 98 according to the invention from a blank 80 of the type of that described with reference to FIG. 8.
  • the blank is first brought flat and then preformed into a belt, the tongue 94 being stuck on the third part 87, the bottom 86 of the body being brought back then glued.
  • the box is then tilted open (step 99), the load 100 being then introduced before closing the flaps 90, 96 then 95, 97 to constitute the top of the box.
  • FIG. 11 shows a panel 103 of double-sided corrugated cardboard, for example 3 mm thick according to an embodiment of the invention with a partially precut line 104, comprising a first zone 105 and a second zone 106.
  • Zone 105 has cut portions 107 of a first length D1, and attachment points 108 of a first length D2.
  • the second zone 106 has cut portions 109 of a second length D1 'shorter than D1, for example two times smaller, and 110 attachment points of the same length D2 as the attachment points 108.
  • Figure 11 also shows the straight blade 111 cutting comprising a net 112 of shape arranged to cut the line partially precut 104 and fixed on a rigid support 113, removably to allow a change easy.
  • FIG 12 gives an enlarged side view of another embodiment of the cutting blade 114 usable with the invention.
  • the blade includes a rectilinear thread which here comprises four zones, with progressive lifting difficulty, know a first zone 115, of easy tearing, a second, less easy pull-out zone 116, one third and fourth zones 117 and 117 ', difficult uprooting without momentum.
  • the first zone 115 is provided with cutting portions 118 of length, for example 15 mm, and of rectangular recessed portions 119 to form the attachment points, of length 5 mm.
  • the second zone 116 comprises cutting portions 118 'of 10 mm and identical recessed portions 119.
  • the third zone 117 comprises cutting portions 118 '' of a third length of 6 mm and recessed portions 119 always 5 mm, and finally the fourth zone 117 'comprises cutting portions 118''of 6 mm and hollow portions 119 'of 16 mm.
  • the present invention is not limited to more embodiments particularly described. She embraces contrary all the variants and in particular those where the precut portions belong in part to flaps of the first and not of the second part.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Cartons (AREA)
  • Making Paper Articles (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Display Devices Of Pinball Game Machines (AREA)

Abstract

The invention concerns a case, a blank and a cardboard or corrugated cardboard sheet package blank. The case is formed from one single blank and comprises a side wall (2) arranged to be entirely torn away manually by a user.

Description

La présente invention concerne une caisse d'emballage en carton ou carton ondulé formée à partir d'un flan d'une seule pièce et comprenant une paroi arrachable.The present invention relates to a box cardboard or corrugated cardboard packaging from a blank of one piece and comprising a removable wall.

Elle concerne également un flan pour obtenir une telle caisse d'emballage, avec prédécoupe partielle des lignes de jonction par lame perforante pour obtenir une paroi arrachable.It also concerns a blank to obtain a such packing box, with partial precut connecting lines with a perforating blade for obtain a removable wall.

Elle trouve une application particulièrement importante, bien que non exclusive, dans le domaine des emballages pour produits rigides (bocaux, boítes...) ou semi rigides (sacs...), permettant de présenter facilement les produits à l'extérieur de leur emballage de transport de façon immédiate, propre et attractive, notamment sur les étagères des rayons de magasins à grande surface.It finds a particularly application important, although not exclusive, in the field packaging for rigid products (jars, boxes ...) or semi rigid (bags ...), allowing easily display products outside their transport packaging immediately, clean and attractive, especially on the shelves of department store shelves.

On connaít déjà (EP 0 637 548) des caisses d'emballage permettant une déconnexion rapide de la partie supérieure de la caisse par rapport à la partie inférieure formant barquette, autorisant une présentation rapide du contenu de l'emballage dans ladite barquette.We already know (EP 0 637 548) cases packaging allowing rapid disconnection of the upper part of the body in relation to the lower part forming a tray, allowing a quick presentation of the contents of the packaging in said tray.

Une telle caisse est cependant obtenue à partir de deux flans différents collés l'un à l'autre et présente l'inconvénient de ne pas permettre d'enlever facilement, rapidement et totalement tous les produits de l'emballage, pour être présentés alignés sur une étagère.Such a case is however obtained from two different blanks glued to each other and has the drawback of not allowing removal easily, quickly and completely all packaging products, to be presented aligned on a shelf.

On connaít également (US-A-3,533,549) une boíte formée par un flan avec ouverture sur le dessus obtenue par arrachage manuel du couvercle, et poignée renforcée. Une telle boíte rigide ne permet pas d'enlever facilement le produit qu'il contient pour le mettre en rayon. We also know (US-A-3,533,549) a box formed by a blank with opening on top obtained by manual removal of the cover, and handle strengthened. Such a rigid box does not allow easily remove the product it contains to put it on the shelf.

La présente invention vise à fournir un flan et une caisse répondant mieux que ceux antérieurement connus aux exigences de la pratique notamment en ce qu'elle autorise l'enlèvement complet de l'emballage par quelques mouvements simples permettant une présentation impeccable sur les étagères dans les magasins.The present invention aims to provide a blank and a box responding better than those previously known to the requirements of practice especially in this that it authorizes the complete removal of the packaging by a few simple movements allowing a impeccable presentation on the shelves in stores.

De plus, l'invention permet un montage en automatique à forte cadence (supérieure à vingt caisses/mn), les caisses obtenues présentant une grande solidité et étant par ailleurs aisément gerbables sur palettes.In addition, the invention allows mounting in automatic at high speed (over twenty cases / min), the cases obtained having a great strength and also being easily stackable on pallets.

Elle permet également de garantir mieux que précédemment une découpe parfaitement contrôlée, facile et fiable à 100%, tout en autorisant une résistance optimisée de 1a zone à déchirer afin de prévenir tout risque accidentel de déchirement des points d'attaches, par exemple à cause d'un choc sur la zone fragilisée ou d'un mouvement violent des produits à l'intérieur de l'emballage.It also helps to better guarantee that previously a perfectly controlled cut, easy and 100% reliable, while allowing optimized resistance of the area to be torn in order to to prevent any accidental risk of tearing of the attachment points, for example due to a shock on the weakened area or a violent movement of products inside the package.

Cette amélioration se révèle particulièrement utile lorsqu'il s'agit de perforations pratiquées sur le pourtour d'une face complète d'emballage, pour laquelle les risques d'amorçage des parties prédécoupées sont importants, surtout sur le milieu des arêtes de la face, ou l'effort est le plus élevé.This improvement is particularly evident useful for perforations on around a complete packaging face, for which the risks of priming of the parts precuts are important, especially on the middle of the edges of the face, or the effort is the highest.

Dans ce but, la présente invention propose notamment une caisse en matière en feuille de carton ou carton ondulé, selon la revendication 1.
Pour ce faire, il est prévu des lignes de jonction entre la paroi formée par un panneau arrachable et les autres panneaux adjacents (fond, couvercle, et parois latérales adjacentes) entièrement prédécoupées.To this end, the present invention provides in particular a box made of a sheet of cardboard or corrugated cardboard, according to claim 1.
To do this, there are provided junction lines between the wall formed by a removable panel and the other adjacent panels (bottom, cover, and adjacent side walls) fully precut.

Par ligne de jonction prédécoupée entre deux panneaux, un panneau étant formé par un volet ou un ou plusieurs rabats du flan, on entend une ligne de jonction constituée par quelques points d'attache ou parties d'attache entre les deux panneaux, ce qui rend les deux panneaux facilement désolidarisables l'un de l'autre, par déchirement de la ligne de jonction en combinant une traction perpendiculaire à la ligne et un détachement progressif des points d'attache l'un après l'autre.By pre-cut junction line between two panels, a panel being formed by a shutter or a or several flaps of the blank, a line of junction consisting of a few attachment points or fasteners between the two panels, which makes the two panels easily removable from each other, by tearing the line of junction by combining a traction perpendicular to the line and a progressive detachment of the points one after the other.

Les lignes de jonction prédécoupées sont ainsi agencées pour présenter une bonne résistance dans le sens de la ligne, et/ou tant qu'une amorce de déchirement n'a pas été entamée.The precut junction lines are thus arranged to exhibit good resistance in the sense of the line, and / or as long as a primer tearing has not started.

Avantageusement un point dur permet d'éviter un début de déchirement de part et d'autre de la ligne et/ou au milieu.Advantageously, a hard point makes it possible to avoid a beginning of tearing on either side of the line and / or in the middle.

De même, et dans la suite, par portion frangible prédécoupée on entendra une portion frangible qui ne tient que par quelques points ou parties d'attache avec le reste du flan et qui est de ce fait facilement désolidarisable du flan, par traction perpendiculaire au plan du flan (quelques Newtons, par exemple de 5 à 10 N).Likewise, and thereafter, per frangible portion precut we will hear a frangible portion that does not holds only by a few points or parts of attachment with the rest of the blank and that is why easily detachable from the blank, by pulling perpendicular to the plane of the blank (some Newtons, for example from 5 to 10 N).

Ainsi, la portion prédécoupée et/ou les lignes prédécoupées sont agencées pour présenter une bonne résistance dans le sens vertical tant que les efforts s'exercent essentiellement dans le plan des parois. Cette résistance est notamment suffisante pour permettre le transport des produits même si l'emballage est saisi par la partie supérieure.Thus, the precut portion and / or the lines precut are arranged to present a good resistance in the vertical direction as long as the forces are mainly exercised in the plane of the walls. This resistance is particularly sufficient for allow the transport of products even if the packaging is gripped by the upper part.

Classiquement, les lignes prédécoupées sont obtenues en perforant le carton en pointillé avec des lames de découpes appelées " filets perforants ". Les pointillés sont donc définis par une alternance régulière de traits perforés dits " coupeurs " et de traits non perforés dits " points d'attache ".Conventionally, the precut lines are obtained by perforating the dotted cardboard with cutting blades called "perforating nets". The dotted lines are therefore defined by an alternation regular perforated lines called "cutters" and non-perforated lines called "attachment points".

La distance qui sépare deux points d'attaches, autrement dit la longueur de coupe, est appelée D1, tandis que la distance qui sépare deux filets coupants, autrement dit la longueur d'un point d'attache, est appelée D2.The distance between two attachment points, in other words the cutting length, is called D1, while the distance between two nets sharp, in other words the length of a point of attachment, is called D2.

On désigne ainsi communément un profil perforant par une série de deux chiffres correspondant à D1 et D2, séparés par un point. Les valeurs D1 et D2 sont toujours constantes sur une même ligne de découpe.A perforating profile is thus commonly designated by a series of two digits corresponding to D1 and D2, separated by a point. The values D1 and D2 are always constant on the same cutting line.

Par exemple, un filet 8.3 sera constitué d'une alternance de découpes de 8 mm de longueur et de points d'attache de 3 mm de longueur.For example, an 8.3 net will consist of a alternating cutouts 8 mm long and attachment points 3 mm long.

Dans le cas présent, le trajet suivi par les pointillés devant aussi servir de ligne de pliage, les filets ont également une fonction dite de " rainage ", c'est-à-dire qu'entre les perforations, les points d'attache sont écrasés par des filets plus profonds pour faciliter le pliage ultérieur autour de la ligne concernée.In the present case, the route followed by the dotted lines also serve as a fold line, the nets also have a so-called "creasing", that is to say that between the perforations, the attachment points are crushed by more deep to facilitate subsequent folding around the line concerned.

De même que les lames ou filets de découpe simple ou que les filets de rainage, les lames perforantes sont généralement réalisées en acier, et sont enchâssées sur une partie de leur hauteur dans une forme en bois qui assure leur rigidité aux déformations latérales lors de la mise en pression sur le carton à découper.As well as simple cutting blades or nets or that the crease nets, the perforating blades are generally made of steel, and are embedded over part of their height in a wooden form which ensures their rigidity to lateral deformations during pressurization on the cardboard to be cut.

La difficulté dans le choix d'un filet consiste à sélectionner celui qui permet d'obtenir un arrachage facile, rapide et propre par l'opérateur tout en évitant une rupture accidentelle des points d'attache par une quelconque autre cause.The difficulty in choosing a net is to select the one which allows to obtain a grubbing up easy, fast and clean by the operator while avoiding accidental breakage of attachment points by any other cause.

C'est ainsi qu'en fonction de la nature du grammage des papiers ainsi que de l'épaisseur du carton ondulé, l'homme du métier sera conduit à faire varier les valeurs D1 et D2 jusqu'à trouver le meilleur compromis possible.This is how, depending on the nature of the paper weight as well as the thickness of the corrugated cardboard, the skilled person will be led to vary the values D1 and D2 until you find the best compromise possible.

Plus la valeur de D2 sera élevée et plus l'énergie nécessaire à l'arrachage sera importante.The higher the value of D2, the higher the energy necessary for uprooting will be important.

De même, plus la valeur de D1 est faible, et plus il y aura de points d'arrachage sur une distance définie, et plus l'énergie sera importante.Similarly, the lower the value of D1, the more there will be tear points over a distance defined, the more energy will be important.

Cependant, au delà d'une certaine valeur de D2, le risque est que la déchirure ne suive pas le trajet prévu, mais qu'au contraire elle s'en écarte, dégradant considérablement l'aspect de la découpe. However, beyond a certain value of D2, the risk is that the tear does not follow the path planned, but on the contrary it deviates from it, considerably degrading the appearance of the cut.

On a par exemple représenté sur le graphe de la figure 1, la variation de la force d'arrachage d'un point d'attache en fonction de la longueur du point d'attache en millimètres pour un type de carton déterminé.We have for example represented on the graph of the Figure 1, the variation of the lifting force of a attachment point according to the length of the point of attachment in millimeters for a type of cardboard determined.

Les zones d'arrachage de l'art antérieur ne parviennent pas toujours à un compromis satisfaisant entre facilité d'arrachage et résistance.The pull-out areas of the prior art do not not always reach a satisfactory compromise between ease of lifting and resistance.

Dans un mode avantageux de réalisation la présente invention propose donc de créer des lignes de jonction variables sur une même longueur de filet perforant, ceci en profitant du fait que le couple de déchirement appliqué sur la zone à déchirer est variable en fonction de l'angle entre la force appliquée et la paroi comportant les points d'attache, et que l'énergie transmise au point d'attache est fonction de la vitesse à laquelle est appliquée le mouvement.In an advantageous embodiment the present invention therefore proposes to create lines of variable junction on the same length of thread perforating, this taking advantage of the fact that the couple of tear applied to the area to be torn is variable depending on the angle between the force applied and the wall with the dots of attachment, and that the energy transmitted to the point of attachment is a function of the speed at which is applied the movement.

Ces zones de résistance variables sont obtenues en faisant varier les distances D1 et D2 sur un même filet.These variable resistance zones are obtained by varying the distances D1 and D2 on the same net.

Ainsi, on pourra démarrer une extrémité de ligne de pointillés par une distance D1 importante et une distance D2 faible, de façon à amorcer facilement la découpe et atteindre une vitesse importante vers le centre de la ligne de pointillés, puis en se rapprochant du centre on réduit progressivement D1 tout en augmentant D2 pour obtenir une résistance au déchirement plus importante, et enfin on réaugmente D1 tout en réduisant D2 au fur et à mesure qu'on approche de l'autre extrémité de la ligne de pointillés.So we can start an end of line of dotted lines by a significant distance D1 and a short distance D2, so as to easily initiate the cut and reach a significant speed towards the center of the dotted line, then approaching the center we gradually reduce D1 while increasing D2 to obtain resistance to greater tearing, and finally we increase D1 while reducing D2 as we go approach the other end of the line of dashed.

L'invention propose ainsi également une caisse d'emballage en feuille de carton ou carton ondulé comprenant une paroi arrachable munie de lignes de jonction partiellement prédécoupée formant un filet présentant des portions coupées de longueur D1 séparées deux à deux par des points d'attache de longueur D2, caractérisée en ce que au moins une des longueurs D1 et D2 varie le long dudit filet.The invention thus also provides a case packing in cardboard sheet or corrugated cardboard comprising a removable wall provided with lines of partially precut junction forming a net having cut portions of length D1 separated two by two by attachment points length D2, characterized in that at least one of the lengths D1 and D2 varies along said thread.

L'invention propose également une caisse d'emballage formée à partir d'un flan unique en matériau en feuille de carton ou carton ondulé, comportant une première paroi verticale reliée par des lignes de jonction aux parois du fond, du dessus et aux parois latérales adjacentes de la caisse, caractérisée en ce que lesdites lignes de jonction sont prédécoupées et en ce que la paroi verticale opposée à la première paroi est solidaire de la paroi du fond par l'intermédiaire d'au moins une portion frangible prédécoupée désolidarisable par simple traction et/ou un ou plusieurs points de collage décollables manuellement par simple traction.The invention also provides a case packaging formed from a single blank in sheet material of cardboard or corrugated cardboard, comprising a first vertical wall connected by connecting lines to the bottom and top walls and to the adjacent side walls of the body, characterized in that said joining lines are precut and in that the vertical wall opposite the first wall is integral with the wall from the bottom through at least a portion frangible precut separable by simple traction and / or one or more bonding points manually removable by simple pull.

Par désolidarisable par simple traction, il faut entendre désolidarisable par écartement manuel obtenu en exerçant une force perpendiculairement aux parois.By detaching by simple pull, it is necessary hear detachable by manual spacing obtained by exerting a force perpendicular to the walls.

Comme déjà mentionné, la ou les portions partiellement prédécoupées et/ou le ou les points de collage sont agencés pour présenter une bonne résistance dans le sens vertical, c'est-à-dire tant que les efforts s'exercent essentiellement dans le plan des parois.As already mentioned, the portion (s) partially precut and / or the point (s) collage are arranged to present good resistance in the vertical direction, i.e. so that the efforts are exerted essentially in the wall plan.

Si par contre l'effort d'écartement exercé entre parois est franchement perpendiculaire aux parois, celles-ci se désolidarisent alors facilement manuellement, sans délaminage du carton, par exemple avec une force de l'ordre de 5 à 10 Newtons, avantageusement et par exemple après passage d'un point dur nécessitant un effort supplémentaire de quelques Newtons de la part de l'utilisateur, utilisant par exemple son pouce comme repoussoir et/ou bras de levier pour passer ce point dur.If, on the other hand, the separation force exerted between walls is frankly perpendicular to the walls, these then dissociate easily manually, without delamination of the cardboard, for example with a force of the order of 5 to 10 Newtons, advantageously and for example after passing a hard point requiring an additional effort of some Newtons from the user, using for example his thumb as a foil and / or lever arm to pass this hard point.

De plus, il convient de noter que, tant que la première paroi latérale de la caisse n'est pas arrachée manuellement par l'utilisateur, la caisse conserve sa rigidité, ce qui n'autorise pas d'écartement ou de bâillement favorisant un risque d'amorce de déchirement, par ailleurs avantageusement encore empêché par le point dur mentionné ci-dessus.In addition, it should be noted that, as long as the first side wall of the body is not torn off manually by the user, the box retains its rigidity, which does not allow spreading or yawning that promotes risk tear initiation, moreover advantageously still prevented by the hard point mentioned above.

Selon un mode de réalisation particulier de l'invention on peut prévoir des lignes prédécoupées avec une lame de découpe pour matériau en feuille de carton ou carton ondulé, comprenant un filet présentant des portions de coupe de longueur D1 séparées deux à deux par des portions en creux de longueur D2, caractérisée en ce que au moins une des longueurs D1 et D2 varie le long dudit filet.According to a particular embodiment of the invention it is possible to provide precut lines with a cutting blade for sheet material cardboard or corrugated cardboard, including a net having cutting portions of length D1 separated two by two by hollow portions of length D2, characterized in that at least one of the lengths D1 and D2 varies along said thread.

Avantageusement le filet présente une première zone avec des portions de coupe d'une première longueur D1 dite importante, suivie d'une deuxième zone de longueur D1', plus petite que D1. Dans des modes de réalisation avantageux, on a de plus recours à l'une et/ou à l'autre des dispositions suivantes :

  • les parois latérales adjacentes à la première paroi sont solidaires de la paroi du fond par l'intermédiaire d'au moins une portion frangible prédécoupée, par exemple sensiblement rectangulaire, désolidarisable par simple traction et/ou un ou plusieurs points de collage décollables manuellement par simple traction ;
  • les parois de la caisse étant formées par des volets et/ou des rabats du flan, les portions frangibles prédécoupées sont découpées selon une ligne ouverte par rapport au bord du volet et/ou du rabat correspondant.
Advantageously, the net has a first zone with cutting portions of a first length D1 called significant, followed by a second zone of length D1 ', smaller than D1. In advantageous embodiments, use is made of one and / or the other of the following arrangements:
  • the side walls adjacent to the first wall are secured to the bottom wall by means of at least one frangible pre-cut portion, for example substantially rectangular, which can be detached by simple traction and / or one or more bonding points which can be removed manually by simple traction;
  • the walls of the box being formed by flaps and / or flaps of the blank, the frangible pre-cut portions are cut in an open line relative to the edge of the flap and / or the corresponding flap.

L'invention propose également un flan permettant d'obtenir la caisse telle que décrite ci-avant.The invention also provides a blank allowing to obtain the cash register as described above.

L'invention propose encore un flan en matière en feuille de carton ou carton ondulé pour la fabrication d'une caisse d'emballage, selon la revendication 17. The invention also provides a blank in terms of sheet of cardboard or corrugated cardboard for manufacture of a packing case, according to claim 17.

Dans des modes de réalisation avantageux, on a de plus recours à l'une et/ou à l'autre des dispositions suivantes :

  • les deuxième et troisième lignes de jonction sont des lignes de pliage reliant le premier volet à des rabats adjacents destinés à former au moins partiellement des parois latérales de la caisse et la quatrième ligne de jonction est une ligne reliant le premier volet à un troisième volet destiné à former le dessus de la caisse ;
  • les deuxième et troisième lignes de jonction sont des lignes de pliage reliant le premier volet à deux volets adjacents destinés à former les parois de la caisse et la quatrième ligne de jonction est une ligne reliant le premier volet à un rabat supérieur destiné à former au moins en partie le dessus de la caisse ;
  • les rabats latéraux du deuxième volet sont chacun muni respectivement d'une portion frangible prédécoupée, par exemple sensiblement rectangulaire ;
  • les portions frangibles prédécoupées des deux rabats latéraux du deuxième volet sont découpées selon une ligne ouverte avec un coté entièrement dégagé vers l'extérieur desdits rabats ;
  • les portions frangibles prédécoupées des deux rabats latéraux du deuxième volet sont situées du coté du premier volet ;
  • chacun des rabats latéraux du deuxième volet comprend au moins une portion frangible prédécoupée supplémentaire ;
  • la quatrième ligne de jonction est en forme de chapeau à cheval sur la ligne de pliage entre le premier volet et le panneau adjacent ;
  • l'une au moins de la portion frangible prédécoupée du quatrième volet et de la quatrième ligne de jonction prédécoupée, est respectivement associée à des moyens de saisie, par exemple comportant une partie évidée dans le flan permettant la préhension pour arrachage par un utilisateur.
In advantageous embodiments, use is made of one and / or the other of the following arrangements:
  • the second and third junction lines are fold lines connecting the first flap to adjacent flaps intended to form at least partially side walls of the box and the fourth junction line is a line connecting the first flap to a third flap intended forming the top of the box;
  • the second and third junction lines are fold lines connecting the first flap to two adjacent flaps intended to form the walls of the body and the fourth junction line is a line connecting the first flap to an upper flap intended to form at least partly the top of the body;
  • the lateral flaps of the second flap are each provided respectively with a frangible pre-cut portion, for example substantially rectangular;
  • the frangible pre-cut portions of the two lateral flaps of the second flap are cut along an open line with one side entirely free towards the outside of said flaps;
  • the frangible portions precut of the two lateral flaps of the second flap are located on the side of the first flap;
  • each of the side flaps of the second flap comprises at least one additional frangible pre-cut portion;
  • the fourth junction line is in the form of a hat straddling the fold line between the first flap and the adjacent panel;
  • at least one of the pre-cut frangible portion of the fourth flap and of the fourth pre-cut junction line, is respectively associated with gripping means, for example comprising a part hollowed in the blank allowing gripping for uprooting by a user.

L'invention sera mieux comprise à la lecture de la description qui suit de modes de réalisation donnés à titre d'exemples non limitatifs. La description se réfère aux dessins qui l'accompagnent dans lesquels :

  • La figure 1 est une vue en plan d'un flan selon un premier mode de réalisation de l'invention.
  • La figure 2 est une vue en plan d'un autre mode de réalisation des rabats du deuxième volet du flan de la figure 1.
  • La figure 3 est une vue en plan d'un autre mode de réalisation des rabats du deuxième volet du flan de la figure 1.
  • La figure 4 est un schéma synoptique de formation puis d'ouverture d'une caisse d'emballage avec le flan de la figure 1, préjonctionné.
  • La figure 5 est une vue en plan d'une laize de carton découpée en continu pour former des flans selon la figure 1.
  • La figure 6 est une vue en plan d'un autre mode de réalisation de flan selon l'invention.
  • La figure 7 est un schéma synoptique de formation d'une caisse d'emballage à partir du flan de la figure 1, par enrobage de la charge avec le flan.
  • La figure 8 est une vue en plan d'un autre mode de réalisation du flan selon l'invention.
  • La figure 9 est un schéma synoptique de formation d'une caisse à partir d'un flan du type de celui décrit en référence à la figure 8.
  • La figure 10 est une courbe donnant la variation de la force d'arrachage d'un point d'attache pour un type de carton particulier.
  • La figure 11 montre une lame de découpe utilisable pour découper des flans selon un mode de réalisation de l'invention, et une paroi d'emballage après découpe.
  • La figure 12 montre une lame de découpe à profil progressif selon un autre mode de réalisation utilisable avec l'invention.
The invention will be better understood on reading the following description of embodiments given by way of nonlimiting examples. The description refers to the accompanying drawings in which:
  • Figure 1 is a plan view of a blank according to a first embodiment of the invention.
  • FIG. 2 is a plan view of another embodiment of the flaps of the second flap of the blank of FIG. 1.
  • FIG. 3 is a plan view of another embodiment of the flaps of the second flap of the blank of FIG. 1.
  • Figure 4 is a block diagram of the formation and opening of a packaging case with the blank of Figure 1, pre-punched.
  • FIG. 5 is a plan view of a width of cardboard cut out continuously to form blanks according to FIG. 1.
  • Figure 6 is a plan view of another embodiment of the blank according to the invention.
  • Figure 7 is a block diagram of forming a packing case from the blank of Figure 1, by coating the load with the blank.
  • Figure 8 is a plan view of another embodiment of the blank according to the invention.
  • FIG. 9 is a block diagram of the formation of a box from a blank of the type described with reference to FIG. 8.
  • Figure 10 is a curve showing the variation of the tear-off force of an attachment point for a particular type of carton.
  • FIG. 11 shows a cutting blade usable for cutting blanks according to an embodiment of the invention, and a packaging wall after cutting.
  • Figure 12 shows a progressive profile cutting blade according to another embodiment usable with the invention.

Dans la suite de la description, on utilisera les mêmes numéros de référence pour désigner les mêmes éléments.In the following description, we will use the same reference numbers to designate the same elements.

La figure 1 montre un flan 1 en carton ondulé double face, par exemple de 3 mm d'épaisseur. Le flan est formé d'une suite de quatre volets rectangulaires 2, 3, 4 et 5 reliés entre eux par des lignes de pliage.Figure 1 shows a blank 1 of corrugated cardboard double-sided, for example 3 mm thick. The blank is made up of a series of four rectangular shutters 2, 3, 4 and 5 interconnected by lines of folding.

Plus précisément, la suite comporte un premier volet 2 destiné à former une paroi latérale de la caisse, relié par une première ligne de jonction 6, confondue avec une ligne de pliage entre volets, à un deuxième volet 3 destiné à former le fond de la caisse, et respectivement par une deuxième ligne 7 et une troisième ligne 8 de jonction formant également lignes de pliage à deux rabats adjacents 10 et 11, rectangulaires ou sensiblement rectangulaires.More specifically, the suite includes a first flap 2 intended to form a side wall of the body, connected by a first junction line 6, confused with a fold line between shutters, at a second part 3 intended to form the bottom of the cash register, and respectively by a second line 7 and a third junction line 8 also forming fold lines with two adjacent flaps 10 and 11, rectangular or substantially rectangular.

Le premier volet 2 est par ailleurs relié à un troisième volet rectangulaire 4, par une quatrième ligne de jonction 9 constituée par une ligne en forme de chapeau. La ligne 9 est à cheval sur la ligne de pliage 12, parallèle et située du côté opposé à la ligne de pliage 6 pour former l'arête opposée de la caisse.The first part 2 is also connected to a third rectangular flap 4, by a fourth junction line 9 consisting of a shaped line hat. Line 9 straddles the line of folding 12, parallel and located on the side opposite the fold line 6 to form the opposite edge of the checkout.

La suite comprend un quatrième volet rectangulaire destiné à former la paroi de la caisse opposée à la première paroi 2.The suite includes a fourth rectangular shutter intended to form the wall of the body opposite to the first wall 2.

Chacune des première, deuxième, troisième et quatrième lignes de jonction (6, 7, 8, 9) sont prédécoupées selon l'invention. Each of the first, second, third and fourth junction lines (6, 7, 8, 9) are precut according to the invention.

La ligne de jonction 9 permet de déterminer deux parties rectangulaires ou trapézoïdales 13 et 14, de volet, situées de part et d'autre d'une portion centrale 15 en forme trapézoïdale, à cheval sur la ligne et comportant une partie située sur le troisième volet 4, terminée par une ouverture ou évidement 16 réalisé dans ledit troisième volet destiné à former le dessus de la caisse.The junction line 9 makes it possible to determine two rectangular or trapezoidal parts 13 and 14, of flap, located on either side of a portion central 15 in trapezoidal shape, straddling the line and having a part located on the third part 4, terminated by an opening or recess 16 made in said third flap intended to form the top of the body.

La ligne 15 a donc une forme de Ω ou de chapeau.Line 15 therefore has a shape of Ω or cap.

L'évidement est par exemple rectangulaire et/ou triangulaire, et permet à l'utilisateur de passer un ou plusieurs doigts de façon à arracher la première paroi formée par le premier volet 2.The recess is for example rectangular and / or triangular, and allows the user to pass a or more fingers to tear off the first wall formed by the first flap 2.

Chacun des volets 3, 4 et 5 comporte également de part et d'autre et dans le prolongement des deux rabats 10 et 12 du premier volet 2, des rabats rectangulaires ou sensiblement rectangulaires, respectivement 17, 18 ; 19, 20 et 21, 22 propres à coopérer une fois la caisse formée avec les rabats du premier volet de façon à former des parois latérales opposées ajourées de la caisse.Each of components 3, 4 and 5 also includes on both sides and in the extension of the two flaps 10 and 12 of the first part 2, flaps rectangular or substantially rectangular, respectively 17, 18; 19, 20 and 21, 22 specific to cooperate once the body is formed with the flaps of the first flap so as to form side walls openwork opposite of the body.

Le deuxième 3 volet comprend du coté opposé au première volet un jeu 23 de trois rabats rectangulaires ou sensiblement rectangulaires, à savoir un rabat central 24 relié au deuxième volet par une ligne de pliage 25 et deux petits rabats d'extrémité 26 reliés respectivement par des lignes de pliage 27 situées dans le prolongement ou sensiblement dans le prolongement de la ligne de pliage 25, aux deux rabats latéraux 17 et 18 du deuxième volet 3.The second 3 part comprises on the opposite side to the first part a set 23 of three flaps rectangular or substantially rectangular, with know a central flap 24 connected to the second flap by a fold line 25 and two small flaps end 26 connected respectively by lines folding 27 located in the extension or substantially in line with the line of folding 25, to the two side flaps 17 and 18 of the second part 3.

Ces deux rabats latéraux 17 et 18 comportent quant à eux chacun et respectivement, du côté du premier volet 2, une portion frangible prédécoupée 28, 29 selon une ligne ouverte avec un côté 30, 31 entièrement dégagé vers l'extérieur des rabats d'une part et vers le premier volet d'autre part.These two side flaps 17 and 18 include to them each and respectively, on the side of the first flap 2, a frangible portion precut 28, 29 along an open line with one side 30, 31 fully exposed to the outside of the flaps of a part and towards the first part on the other hand.

Le quatrième volet 5 comprend quant à lui sur son bord externe 32 situé du côté opposé au troisième volet 4 une portion frangible prédécoupée 33, par exemple rectangulaire ou trapézoïdale, propre à coopérer avec le rabat central 24 du deuxième volet 3.The fourth part 5 includes on its outer edge 32 located on the side opposite the third flap 4 a frangible portion precut 33, by example rectangular or trapezoidal, specific to cooperate with the central flap 24 of the second flap 3.

Cette portion prédécoupée 33 est prolongée vers le volet 5 par une partie évidée 34 dans ledit quatrième volet 5, de préhension de la paroi, pour permettre un arrachage facile une fois le flan conformé pour former un emballage.This precut portion 33 is extended towards the part 5 by a hollowed out part 34 in said fourth flap 5, for gripping the wall, to allow a easy removal once the blank is shaped form a package.

On a représenté sur les figures 2 et 3 d'autres modes de réalisation des rabats du deuxième volet 3 selon l'invention.Figures 2 and 3 show other embodiments of the flaps of the second part 3 according to the invention.

La figure 2 montre ainsi un deuxième volet 3 muni de deux rabats latéraux 17' et 18', chacun muni d'un rabat d'extrémité 26. Les deux rabats 17' et 18' sont munis chacun de deux portions partiellement prédécoupées 35 et 36, 37 et 38, rectangulaires ou sensiblement rectangulaires, symétriques deux à deux par rapport à l'axe longitudinal 39 du flan. Figure 2 thus shows a second flap 3 provided two side flaps 17 'and 18', each fitted with a end flap 26. The two flaps 17 'and 18' are each provided with two partially pre-cut 35 and 36, 37 and 38, rectangular or substantially rectangular, symmetrical two by two relative to the longitudinal axis 39 of the blank.

Les portions 35 et 37 sont situées à l'extrémité des rabats dirigée vers le premier volet 2 et sont libres sur trois côtés.Portions 35 and 37 are located at the end flaps directed to the first flap 2 and are free on three sides.

Les portions 36 et 38 sont situées du côté de l'autre extrémité des rabats et sont libres sur deux côtés, ce qui permet de ménager une partie 39, 40 en retrait dans le rabat 17', 18' vers le volet 3.The portions 36 and 38 are located on the side of the other end of the flaps and are free in two sides, which allows to save a part 39, 40 in withdrawal in the flap 17 ', 18' towards the flap 3.

La figure 3 montre un autre mode de réalisation des rabats 17'', 18'' du deuxième volet 3 selon l'invention.Figure 3 shows another embodiment 17 '', 18 '' flaps of the second part 3 according to the invention.

Chaque rabat est muni de deux portions prédécoupées 28' et 29', du type des parties 28 et 29 décrites en référence à la figure 1, et deux autres parties prédécoupées 41 et 42, libres uniquement sur le côté confondu avec le bord externe du rabat.Each flap has two portions pre-cut 28 'and 29', of the type of parts 28 and 29 described with reference to Figure 1, and two others pre-cut parts 41 and 42, free only on the side merged with the outer edge of the flap.

Dans ce mode de réalisation, les rabats 17'', 18'' ne sont pas munis de petits rabats d'extrémité.In this embodiment, the flaps 17 '', 18 '' do not have small end flaps.

C'est par contre le rabat central 43 du volet 3 qui comporte deux petites languettes ou rabat 44 d'extrémité, qui vont pouvoir être rabattus pour former une caisse selon l'invention.It is on the other hand the central flap 43 of the flap 3 which has two small tabs or flap 44 end, which can be folded down to form a box according to the invention.

Celle-ci va maintenant plus particulièrement être décrite en référence à la figure 4, donnant un schéma synoptique 45 d'un premier mode de réalisation de formation de la caisse obtenue avec le flan 1 décrit ci-avant.This will now be more particularly described with reference to Figure 4, giving a diagram block 45 of a first embodiment of formation of the body obtained with the blank 1 described above.

A partir du flan 1 préjonctionné par l'intermédiaire du rabat central 24 avec la portion prédécoupée 33 du quatrième volet 5, le flan est ouvert en 46, puis mis à l'équerre (étape 47). From blank 1 pre-punched by through the central flap 24 with the portion pre-cut 33 of the fourth part 5, the blank is opened in 46, then set square (step 47).

La charge 48 est introduite latéralement dans l'emballage, comme montré en 49, puis les rabats latéraux destinés à former les parois latérales de la caisse sont rabattus après pré-encollage par exemple avec de la colle hot-melt, notamment des portions 28, 29 partiellement prédécoupées, de façon à former la caisse telle que montrée en fin de formation en 50.Load 48 is introduced laterally into the packaging, as shown in 49, then the flaps side intended to form the side walls of the body are folded down after pre-gluing for example with hot-melt glue, in particular portions 28, 29 partially precut, so as to form the body as shown at the end of training in 50.

La caisse est alors véhiculée puis amenée par exemple dans un supermarché.The box is then transported and brought by example in a supermarket.

La paroi formée par le premier volet 2 est alors arrachée (étape 51) manuellement par un utilisateur, ce que ce dernier peut faire facilement compte tenu des lignes de jonction prédécoupées, puis l'emballage est mis sur l'étagère (non représentée).The wall formed by the first flap 2 is then torn off (step 51) manually by a user, what the latter can easily do given pre-cut junction lines, then packaging is put on the shelf (not shown).

La partie inférieure 52 formant le fond est désolidarisée au niveau des portions prédécoupées 28, 29 par écartement vers l'extérieur dans le sens de la flèche 53 (étape 54).The lower part 52 forming the bottom is uncoupled at the level of the precut portions 28, 29 by spreading outwards in the direction of arrow 53 (step 54).

Le fond 52 en forme de pelle est alors extrait par en dessous, par l'utilisateur qui retient en les repoussant manuellement le dessus ou la partie supérieure 55 de la caisse et la charge 48.The shovel-shaped bottom 52 is then extracted by below, by the user who retains them manually pushing the top or part upper 55 of the body and the load 48.

Enfin la partie supérieure 55 de la caisse est enlevée de façon à libérer entièrement la charge 48 sur l'étagère.Finally the upper part 55 of the body is removed so as to completely release the load 48 on the bookshelf.

La figure 5 montre un ensemble 56 de flans 1, 1', 1'' tels que décrits en référence à la figure 1, qui peuvent être facilement fabriqués à partir d'une même laize de carton, en continu. FIG. 5 shows a set 56 of blanks 1, 1 ′, 1 '' as described with reference to Figure 1, which can be easily made from the same width of cardboard, continuous.

Les lignes de jonction prédécoupées 6, 7, 8, 9 ou de raccordement de portions prédécoupées 28, 29, 33 sont obtenues en perforant le carton en pointillé avec des lames de découpe à filer perforant.Pre-cut junction lines 6, 7, 8, 9 or for connecting pre-cut portions 28, 29, 33 are obtained by punching the dotted cardboard with perforating spinning cutting blades.

Les pointillés sont donc définis par une alternance de traits perforés et de traits non perforés dits points d'attache.The dotted lines are therefore defined by a alternating perforated lines and non-perforated lines perforated so-called attachment points.

La distance qui sépare deux points d'attache, ou autrement dit longueur de coupe, étant appelée D1 et la distance qui sépare deux traits perforés, ou autrement dit longueur de point d'attache, étant appelée D2, un profile perforant est donc défini par les deux chiffres correspondant à D1 et D2.The distance between two attachment points, or in other words cutting length, being called D1 and the distance between two perforated lines, or in other words length of attachment point, being called D2, a perforating profile is therefore defined by the two digits corresponding to D1 and D2.

En fonction de la nature et du grammage des papier, ainsi que de l'épaisseur du carton ondulé, on fait varier les valeurs de D1 et D2 jusqu'à trouver le meilleur compromis possible pour permettre un arrachage facile tout en conservant une solidité suffisante de l'emballage.Depending on the nature and grammage of paper, as well as the thickness of the corrugated cardboard, varies the values of D1 and D2 until you find the best possible compromise to allow a easy removal while retaining strength sufficient packaging.

Avantageusement, on fait donc ainsi varier D1 et D2 sur la même ligne prédécoupée pour créer des points plus fragiles ou des points durs comme indiqué ci-avant.Advantageously, we therefore vary D1 and D2 on the same pre-cut line to create more fragile points or hard points as indicated above.

La figure 6 montre un autre mode de réalisation de flans 57, 57' encastrés en opposition, fabriqués en continu à partir d'une même laize de carton.Figure 6 shows another embodiment of blanks 57, 57 'recessed in opposition, manufactured in continuous from the same width of cardboard.

Le premier volet 58 comporte ici deux rabats 59 et 60, symétriques par rapport à l'axe longitudinal 61 du flan et chacun formé d'une première partie rectangulaire et d'une deuxième partie trapézoïdale ou sensiblement triangulaire de plus grande hauteur que la première partie située du côté du troisième volet 62 et dirigés vers l'extérieur du flan.The first flap 58 here has two flaps 59 and 60, symmetrical with respect to the longitudinal axis 61 blank and each formed by a first part rectangular and a second trapezoidal part or substantially triangular of greater height that the first part located on the side of the third flap 62 and directed towards the outside of the blank.

Les rabats 63, 64 du deuxième volet destiné à former le fond de l'emballage, sont des petits rabats rectangulaires situés sur le pourtour dudit deuxième volet. Les deux rabats latéraux 63 sont prolongés par une petite languette 65, le rabat central 64, d'extrémité, étant par exemple de même largeur que les rabats latéraux 63.The flaps 63, 64 of the second part intended for form the bottom of the package, are small flaps rectangular located on the periphery of said second shutter. The two side flaps 63 are extended by a small tongue 65, the central flap 64, end, being for example the same width as the side flaps 63.

Le troisième volet 62 et le quatrième volet 66 comportent chacun de part et d'autre deux grands rabats rectangulaire ou sensiblement rectangulaires 67, 68, destinés à former lorsqu'ils seront collés entre eux, et avec les rabats des premier et deuxième volets, les deux autres parois latérales de la caisse.The third part 62 and the fourth part 66 each have two large sides rectangular or substantially rectangular flaps 67, 68, intended to form when they are glued between them, and with the flaps of the first and second shutters, the other two side walls of the checkout.

On a représenté sur la figure 7 un autre mode de réalisation de formation d'un emballage à partir d'un flan 1 selon l'invention.Another mode of packaging formation from a blank 1 according to the invention.

Dans ce cas le flan 1 n'est pas préjonctionné comme décrit en référence à la figure 4, mais amené à plat (étape 70).In this case the blank 1 is not pre-cut as described with reference to Figure 4, but brought to flat (step 70).

La charge 71 peut soit être pistonnée (mode non représenté), soit amenée latéralement sur la flan (étape 72), avant de replier le flan autour de l'emballage par enrobage comme présenté en 73, la charge reposant sur le dessus de l'emballage ou troisième volet 4. Load 71 can either be pistoned (no mode shown), or brought laterally on the blank (step 72), before folding the blank around packaging by coating as presented in 73, the load resting on top of the package or third part 4.

L'emballage est ensuite terminé comme montré en 74 sur la figure 7, les rabats 10, 11 ; 21, 22, puis 17, 18, 19, 20 étant rabattus après encollage, le deuxième volet 3 propre à former le fond de l'emballage, étant rabattu sur la charge, son rabat central d'extrémité 24 étant collé sur la portion prédécoupée 33 du quatrième volet 25 comme indiqué en 75.The packaging is then finished as shown in 74 in Figure 7, the flaps 10, 11; 21, 22, then 17, 18, 19, 20 being folded down after gluing, the second part 3 suitable for forming the bottom of the packaging, being folded over the load, its flap end center 24 being glued to the portion pre-cut 33 of the fourth part 25 as indicated in 75.

Sur la figure 8 on a représenté un autre mode de réalisation d'un flan 80 selon l'invention comprenant un premier volet 81 relié par des première, deuxième, troisième et quatrième lignes de jonction prédécoupées 82, 83, 84, 85 respectivement à un deuxième volet 86, un troisième volet 87 et un cinquième volet 88, le deuxième volet 86 étant destiné à former le fond de la caisse et étant par exemple identique au deuxième volet décrit en référence à la figure 1.In FIG. 8 another mode of production of a blank 80 according to the invention comprising a first flap 81 connected by first, second, third and fourth junction lines 82, 83, 84, 85 respectively to a second part 86, a third part 87 and a fifth part 88, the second part 86 being intended to form the bottom of the body and being by example identical to the second part described in reference to figure 1.

Les troisième et cinquième volets 87, 88 sont quant à eux situés de part et d'autre du premier volet 81, avec lequel ils sont reliés par les deuxième et troisième lignes de jonction prédécoupées confondues avec les lignes de pliage, la quatrième ligne de jonction 85 étant quant à elle à cheval avec une ligne de pliage 89 de jonction avec un rabat rectangulaire 90 pour former des portions identiques aux portions 13, 14, 15 et un évidement identique à l'évidement 16 du flan de la figure 1.The third and fifth parts 87, 88 are meanwhile located on either side of the first flap 81, with which they are connected by second and third pre-cut junction lines confused with the fold lines, the fourth junction line 85 being on horseback with a folding line 89 of junction with a flap rectangular 90 to form identical portions in portions 13, 14, 15 and a recess identical to the recess 16 in the blank of FIG. 1.

Un quatrième volet 91 est prévu à l'extrémité du cinquième volet 88 et comporte la portion prédécoupée 92, identique à la portion 33 selon l'invention, qui va être collée sur le rabat d'extrémité 93 du deuxième volet.A fourth flap 91 is provided at the end of the fifth part 88 and includes the pre-cut portion 92, identical to the portion 33 according to the invention, which will be glued to the end flap 93 of the second part.

Le quatrième volet comporte de plus une languette d'extrémité 94 de collage avec le troisième volet 87 (ou inversement la languette peut être sur le troisième volet et se colle sur le quatrième) chacun des troisième, quatrième et cinquième volets comportant un rabat sensiblement rectangulaires, 95, 96, 97 de même largeur que le rabat du premier volet et qui sont destinés à former le dessus de la caisse. Les rabats 95 et 97 sont symétriques par rapport au premier volet 81 et comportent par exemple un décrochement à l'angle situé du côté du rabat 90 du premier volet, de forme complémentaire à la portion 15.The fourth part also has a tab end 94 of bonding with the third flap 87 (or conversely the tab can be on the third part and sticks to the fourth) each third, fourth and fifth parts comprising a substantially rectangular flap, 95, 96, 97 of the same width as the flap of the first flap and which are intended to form the top of the body. The flaps 95 and 97 are symmetrical with respect to the first part 81 and include for example a offset at the angle located on the side of the flap 90 of the first flap, complementary in shape to the portion 15.

On a représenté sur la figure 9 la formation d'une caisse 98 selon l'invention à partir d'un flan 80 du type de celui décrit en référence la figure 8.FIG. 9 shows the formation of a box 98 according to the invention from a blank 80 of the type of that described with reference to FIG. 8.

Le flan est tout d'abord amené à plat puis préformé en forme de ceinture, la languette 94 étant collée sur le troisième volet 87, le fond 86 de la caisse étant ramené puis collé. La caisse est alors basculée ouverte (étape 99), la charge 100 étant ensuite introduite avant fermeture des rabats 90, 96 puis 95, 97 pour constituer le dessus de la caisse.The blank is first brought flat and then preformed into a belt, the tongue 94 being stuck on the third part 87, the bottom 86 of the body being brought back then glued. The box is then tilted open (step 99), the load 100 being then introduced before closing the flaps 90, 96 then 95, 97 to constitute the top of the box.

La figure 10 montre une courbe 101 donnant la variation de la force d'arrachage d'un point d'attache pour un profil 10.D2, soit avec D1 = longueur des coupeurs de 10 mm, D2 = longueur du point d'attache (mm) en abscisse et la force de rupture (N) en ordonnée, pour un carton ondulé de qualité PC 2T30C090 T140 et un grammage total du carton de 410 g/mm2.FIG. 10 shows a curve 101 giving the variation of the tearing force of an attachment point for a profile 10.D2, that is to say with D1 = length of the cutters of 10 mm, D2 = length of the attachment point ( mm) on the abscissa and the breaking force (N) on the ordinate, for PC 2T30C090 T140 quality corrugated cardboard and a total grammage of the cardboard of 410 g / mm 2 .

On voit que pour D2 = 3 mm, la force est de 9,3 N, pour D2 = 4 mm, on a 12,6 N etc.We see that for D2 = 3 mm, the force is 9.3 N, for D2 = 4 mm, we have 12.6 N etc.

A partir de ces valeurs et celle d'autres courbes similaires, l'homme du métier va pouvoir doser les force d'arrachage en fonction des besoins.
La figure 11 montre un panneau 103 en carton ondulé double face, par exemple de 3 mm d'épaisseur selon un mode de réalisation de l'invention avec une ligne partiellement prédécoupée 104, comprenant une première zone 105 et une deuxième zone 106.From these values and that of other similar curves, a person skilled in the art will be able to measure the tear-out force as required.
FIG. 11 shows a panel 103 of double-sided corrugated cardboard, for example 3 mm thick according to an embodiment of the invention with a partially precut line 104, comprising a first zone 105 and a second zone 106.

La zone 105 comporte des portions découpées 107 d'une première longueur D1, et des points d'attache 108 d'une première longueur D2. La deuxième zone 106 comporte des portions découpées 109 d'une deuxième longueur D1' plus petite que D1, par exemple deux fois plus petite, et des points d'attache 110 de la même longueur D2 que les points d'attache 108.Zone 105 has cut portions 107 of a first length D1, and attachment points 108 of a first length D2. The second zone 106 has cut portions 109 of a second length D1 'shorter than D1, for example two times smaller, and 110 attachment points of the same length D2 as the attachment points 108.

La figure 11 montre également la lame rectiligne 111 de découpe comportant un filet 112 de forme agencée pour découper la ligne partiellement prédécoupée 104 et fixée sur un support rigide 113, de façon amovible pour en permettre un changement facile.Figure 11 also shows the straight blade 111 cutting comprising a net 112 of shape arranged to cut the line partially precut 104 and fixed on a rigid support 113, removably to allow a change easy.

La figure 12 donne une vue latérale agrandie d'un autre mode de réalisation de la lame de découpe 114 utilisable avec l'invention. La lame comprend un filet rectiligne qui comporte ici quatre zones, de difficulté d'arrachage progressif, à savoir une première zone 115, d'arrachage facile, une deuxième zone 116 d'arrachage moins facile, une troisième et une quatrième zone 117 et 117', d'arrachage difficile sans élan.Figure 12 gives an enlarged side view of another embodiment of the cutting blade 114 usable with the invention. The blade includes a rectilinear thread which here comprises four zones, with progressive lifting difficulty, know a first zone 115, of easy tearing, a second, less easy pull-out zone 116, one third and fourth zones 117 and 117 ', difficult uprooting without momentum.

La première zone 115 est munie de portions de découpe 118 de longueur par exemple 15 mm, et de portions en creux rectangulaires 119 pour former les points d'attache, de longueur 5 mm.
La deuxième zone 116 comprend des portions de découpe 118' de 10 mm et des portions en creux 119 identiques.
La troisième zone 117 comprend des portions de découpe 118'' d'une troisième longueur de 6 mm et des portions en creux 119 toujours de 5 mm, et enfin la quatrième zone 117' comporte des portions de découpe 118'' de 6 mm et des portions en creux 119' de 16 mm.The first zone 115 is provided with cutting portions 118 of length, for example 15 mm, and of rectangular recessed portions 119 to form the attachment points, of length 5 mm.
The second zone 116 comprises cutting portions 118 'of 10 mm and identical recessed portions 119.
The third zone 117 comprises cutting portions 118 '' of a third length of 6 mm and recessed portions 119 always 5 mm, and finally the fourth zone 117 'comprises cutting portions 118''of 6 mm and hollow portions 119 'of 16 mm.

Comme il va de soi et comme il résulte également de ce qui précède, la présente invention n'est pas limitée aux modes de réalisation plus particulièrement décrits. Elle en embrasse au contraire toutes les variantes et notamment celles où les portions prédécoupées appartiennent en partie aux rabats du premier et non du deuxième volet.As it goes without saying and as it also results of the above, the present invention is not limited to more embodiments particularly described. She embraces contrary all the variants and in particular those where the precut portions belong in part to flaps of the first and not of the second part.

Claims (24)

  1. Case made of cardboard or corrugated cardboard sheet material formed from a single blank and comprising a panel forming at least partly a first side wall (2, 58, 81), said panel or said first wall being arranged so as to be capable of being completely torn off manually by a user while being connected by pre-cut joining lines (6, 7, 8, 9; 82, 83, 84, 85) to the first wall and/or the adjacent walls of the case, said adjacent walls comprising two side walls or two portions of side walls and one wall known as the bottom wall of the case,
    characterised in that the side walls or portions of side walls (10, 11; 59, 60; 87, 88) adjacent to the first wall (2, 58, 81) are respectively integral with the bottom wall (3, 86) or with overlaps (17, 18) connected to the bottom wall, by the intermediary of at least one pre-cut breakable portion (28, 29, 28', 29'; 35, 37; 41, 42) detachable by simple traction and/or one or more adhesion points that can be unstuck manually by simple traction.
  2. Case according to Claim 1, characterised in that the pre-cut joining lines are formed at least partly by folding lines.
  3. Case according to any one of the preceding claims, characterised in that, the walls of the case being formed by flaps and/or overlaps of the blank, the pre-cut breakable portions are cut out along a line that opens out on the edge of the flap and/or the corresponding overlap.
  4. Case according to any one of the preceding claims, characterised in that the wall opposite the first wall is integral with the bottom wall (3, 86) or with an overlap (24, 64, 93) connected to the bottom wall, by the intermediary of at least one pre-cut breakable portion (33, 92) detachable by simple traction and/or one or more adhesion points that can be unstuck manually by simple traction.
  5. Case according to Claim 4, characterised in that the single blank comprises at least four rectangular flaps, namely a first flap (2, 58, 81) intended to form the first wall of the case connected by a first joining line (6, 82) to a second flap (3, 86) intended to form the bottom wall of the case, and by second, third and fourth joining lines (7, 8, 9; 83, 84, 85) respectively to adjacent panels forming an overlap or overlaps (10, 11; 90) and at least one rectangular third flap (4; 62; 87; 88), and a fourth rectangular flap (5; 66; 91) intended to form the wall opposite the first wall of the case,
    and in that the second flap (3) has two side overlaps (17, 18; 17', 18'; 17", 18"; 63) and an end overlap (24; 43; 64; 93), the fourth flap (5; 66; 91) or the end overlap (24; 43; 64; 93) of the second flap comprising the pre-cut breakable portion (33; 92).
  6. Case according to Claim 5, characterised in that the second and third joining lines (7, 8) are folding lines connecting the first flap (2) to adjacent overlaps (17, 18) intended to form at least partially the adjacent side walls of the case and the fourth joining line (9) is a line connecting the first flap (2) to a third flap (4; 62) intended to form the top wall of the case.
  7. Case according to Claim 5, characterised in that the second and third joining lines (83, 84) are folding lines connecting the first flap (81) to two adjacent flaps (87, 88) intended to form the adjacent walls of the case and the fourth joining line (85) is a line connecting the first flap to an upper overlap (90) intended to form, at least partly, the top wall of the case.
  8. Case according to any one of Claims 5 to 7, characterised in that the pre-cut breakable portions (28', 29'; 35, 37) are located on the side of the first flap (2) and in that each of said side overlaps (17', 18'; 17", 18") of the second flap (3) comprises at least one additional pre-cut breakable portion (36, 38; 41, 42).
  9. Case according to any one of the preceding claims, characterised in that the fourth joining line (15, 85) is in the shape of a hat astride the folding line (12) between the first wall and the top wall of the case.
  10. Case according to any one of the preceding claims, characterised in that the first wall and the opposite wall are associated with a hollowed-out part in the blank allowing tearing off by a user.
  11. Case according to any one of the preceding claims, characterised in that at least one pre-cut joining line forms a line having cut portions of a length D1 separated in twos by fastening points of a length D2, at least one of the lengths D1 and D2 varying along said line.
  12. Case according to Claim 11, characterised in that the line is rectilinear in form.
  13. Case according to Claim 11, characterised in that the line is curvilinear in form or has at least one angle.
  14. Case according to any one of Claims 11 to 13, characterised in that the line has a first zone with cut portions of a first length D1 described as large, in order to start the cut-out easily and to reach a significant tearing speed, followed by a second zone of a length D1', less than D1, in order to obtain a greater resistance to tearing.
  15. Case according to any one of Claims 11 to 14, characterised in that the line has a first zone with tearing points of a first length D2 described as small, in order to start the cut-out easily and to reach a significant tearing speed, followed by a second zone of a length D2', greater than D2, in order to obtain a greater resistance to tearing.
  16. Case according to any one of Claims 11 to 15, characterised in that the line has a third zone having cut-out portions of a length D1" greater than D1', and/or tearing points of a length D2" of length less than D2', again to decrease resistance to tearing.
  17. Blank (1, 1', 1"; 57, 57'; 80) made of cardboard or corrugated cardboard sheet material for the manufacture of a case comprising at least four rectangular flaps, said rectangular flaps comprising a panel at least partly forming a first flap (2, 58, 81) intended to form a first side wall of the case, said panel being connected by a first joining line (6, 82) to a second flap (3, 86) intended to form the bottom of the case, and by second, third and fourth joining lines (7, 8, 9; 83, 84, 85) respectively to adjacent panels formed by an overlap or overlaps (10, 11; 90) and at least one third flap (4; 62; 87, 88), and a fourth rectangular flap (5; 66; 91) intended to form a second side wall of the case opposite the first wall,
    characterised in that the second flap (3, 86) has two side overlaps (17, 18; 17', 18'; 17", 18"; 63) and an end overlap (24, 43; 64; 93),
    in that the first, second, third and fourth joining lines are pre-cut,
    and in that the side overlaps (17, 18; 63) of the second flap (3, 86) are each provided with a pre-cut breakable portion (28, 29; 28', 29', 35, 37) respectively.
  18. Blank (1, 1', 1"; 57) according to Claim 17, characterised in that the second and third joining lines (7, 8) are folding lines connecting the first flap (2) to adjacent overlaps (17, 18) intended to form, at least partly, side walls of the case and the fourth joining line (15) is a line connecting the first flap (2) to a third flap (4; 62) intended to form the top of the case.
  19. Blank (80) according to Claim 17, characterised in that the second and third joining lines (83, 84) are folding lines connecting the first flap (81) to two adjacent flaps (87, 88) intended to form the walls of the case and the fourth joining line (85) is a line connecting the first flap (81) to an upper overlap (90) intended to form, at least partly, the top of the case.
  20. Blank according to any one of Claims 17 to 19, characterised in that the fourth flap (5; 66; 91) or the end overlap of the second flap comprise at least one pre-cut breakable portion (33; 92) respectively.
  21. Blank according to Claim 20, characterised in that the pre-cut breakable portions (28, 29; 28', 29'; 35, 37) of the two side overlaps of the second flap are cut out along an open line with one completely clear side towards the outside of said overlaps.
  22. Blank according to any one of Claims 20 and 21, characterised in that the breakable pre-cut portions (28', 29'; 35, 37) are located on the side of the first flap (2) and in that each of said side overlaps (17', 18'; 17", 18") of the second flap (3) comprises at least one additional pre-cut breakable portion (36, 38; 41, 42).
  23. Blank according to any one of Claims 17 to 23, characterised in that the fourth joining line (15, 85) is in the shape of a hat astride the folding line between the first flap and the adjacent panel.
  24. Blank according to any one of Claims 17 to 23, characterised in that the pre-cut breakable portion (33, 92) of the fourth flap (5, 91) and the fourth pre-cut joining line (15, 85) are each respectively associated with a portion (16, 34) hollowed out from the blank allowing gripping for tearing off by a user.
EP00936970A 1999-06-15 2000-05-29 Case and cardboard blank with tearaway wall Expired - Lifetime EP1093433B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9907579A FR2795051B1 (en) 1999-06-15 1999-06-15 BOX, CARDBOARD BLANK WITH REMOVABLE ZONE, AND PERFORATING BLADE FOR PRE-CUTTING SUCH A ZONE
FR9907579 1999-06-15
FR9915704 1999-12-13
FR9915704A FR2802179B1 (en) 1999-12-13 1999-12-13 BLANK AND PACKING BOX WITH RELEASABLE WALL
PCT/FR2000/001468 WO2000076856A2 (en) 1999-06-15 2000-05-29 Case and cardboard blank with tearaway wall

Publications (2)

Publication Number Publication Date
EP1093433A1 EP1093433A1 (en) 2001-04-25
EP1093433B1 true EP1093433B1 (en) 2002-11-20

Family

ID=26234990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00936970A Expired - Lifetime EP1093433B1 (en) 1999-06-15 2000-05-29 Case and cardboard blank with tearaway wall

Country Status (10)

Country Link
EP (1) EP1093433B1 (en)
JP (1) JP2003502220A (en)
AT (1) ATE228086T1 (en)
AU (1) AU763170B2 (en)
CA (1) CA2374569A1 (en)
DE (1) DE60000814T2 (en)
ES (1) ES2184717T3 (en)
NZ (1) NZ516586A (en)
PT (1) PT1093433E (en)
WO (1) WO2000076856A2 (en)

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WO2019145816A1 (en) 2018-01-24 2019-08-01 Stora Enso Oyj Package having a tear away portion and blank therefor

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EP1072523A1 (en) * 1999-07-22 2001-01-31 Kaysersberg Packaging Package formed of a semi-rigid material such as carton for shelving systems in supermarkets
WO2019145816A1 (en) 2018-01-24 2019-08-01 Stora Enso Oyj Package having a tear away portion and blank therefor

Also Published As

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AU763170B2 (en) 2003-07-17
EP1093433A1 (en) 2001-04-25
WO2000076856A2 (en) 2000-12-21
ATE228086T1 (en) 2002-12-15
JP2003502220A (en) 2003-01-21
PT1093433E (en) 2003-04-30
ES2184717T3 (en) 2003-04-16
AU5227600A (en) 2001-01-02
DE60000814T2 (en) 2003-08-28
CA2374569A1 (en) 2000-12-21
NZ516586A (en) 2003-02-28
WO2000076856A3 (en) 2001-05-25
DE60000814D1 (en) 2003-01-02

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