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 cardboard or corrugated cardboard packaging case formed from a single-piece blank and comprising a removable wall.
• It also relates to a blank for obtaining such a packaging case and a perforating blade for partial pre-cutting of the junction lines with such a tear-away wall.
• the invention allows automatic assembly at a high rate (greater than twenty boxes / min), the boxes obtained having great strength and also being easily stackable on pallets.
• This improvement is particularly useful when perforations are made around the edge of a complete packaging face, for which the risks of priming of the precut parts are significant, especially on the middle of the edges of the face, or the effort is the highest.
• the present invention provides in particular a box made of a sheet of cardboard or corrugated cardboard, characterized in that it is formed from a single blank and in that it has a side wall arranged to be entirely manually removable by a user.
• 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 flap or one or more flaps of the blank, is meant a junction line formed by a few attachment points or attachment parts between the two panels, which makes the two panels which can easily be separated from one another, by tearing the junction line by combining a traction perpendicular to the line and a progressive detachment of the attachment points one after the other.
• the precut junction lines are thus arranged to exhibit good resistance in the direction of the line, and / or as long as a tear initiation has not been started.
• a hard point makes it possible to avoid the beginning of tearing on either side of the line and / or in the middle.
• frangible portion precut a frangible portion which only holds by a few points or parts of attachment with the rest of the blank and which is therefore easily detachable from the blank, by traction perpendicular to the plane of the blank (some Newtons, for example from 5 to 10 N).
• the precut portion and / or the precut lines are arranged to have good resistance in the vertical direction as long as the forces are exerted essentially in the plane of the walls. This resistance is in particular sufficient to allow the transport of the products even if the packaging is grasped by the upper part.
• the precut lines are obtained by perforating the cardboard in dotted lines with cutting blades called “perforating nets”. The dotted lines are therefore defined by a regular alternation of perforated lines called “cutters” and non-perforated lines called "attachment points”.
• the distance between two attachment points in other words the cutting length
• D2 the distance between two cutting threads, in other words the length of an attachment point
• a perforating profile is thus commonly designated by a series of two figures corresponding to Dl and D2, separated by a point.
• the values Dl and D2 are always constant on the same cutting line.
• an 8.3 net will consist of alternating cutouts 8 mm long and attachment points 3 mm long.
• the path followed by the dotted lines must also serve as a fold line, the nets also have a function called “creasing", that is to say that between the perforations, the attachment points are crushed by deeper threads 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 the pressurization on the cardboard to be cut.
• the difficulty in choosing a net consists in selecting the one which makes it possible to obtain an easy, quick and clean lifting by the operator while avoiding accidental rupture of the attachment points by any other cause.
• the present invention therefore proposes to create variable junction lines on the same length of perforating thread, this taking advantage of the fact that the tearing torque applied to the area to be torn is variable depending on the angle between the applied force and the wall containing the attachment points, and that the energy transmitted to the attachment point is a function of the speed at which the movement is applied.
• variable resistance zones are obtained by varying the distances D1 and D2 on the same thread.
• the invention thus also proposes a packing case made of cardboard sheet or corrugated cardboard comprising a tear-off wall provided with partially precut junction lines forming a net having cut portions of length Dl separated two by two by attachment points of length D2, characterized in that at least one of the lengths Dl and D2 varies along said thread.
• the invention also provides a packaging case formed from a single blank of cardboard or corrugated sheet material, comprising a first vertical wall connected by connecting lines to the bottom walls, the top and the side walls. adjacent to the body, characterized in that said junction lines are precut and in that the vertical wall opposite the first wall is secured to the bottom wall by means of at least one frangible pre-cut portion which can be detached by simple pulling and / or one or more bonding points that can be removed manually by simple pull.
• the partially precut portion (s) and / or the bonding point (s) are arranged to have good resistance in the vertical direction, that is to say as much that the forces are exerted essentially in the plane of the walls.
• the spacing force exerted between walls is certainly perpendicular to the walls, the latter then easily dissociate manually, without delamination of the cardboard, for example with a force of the order of 5 to 10 Newtons, advantageously and by example after passing a hard point requiring an additional effort of a few Newtons on the part of the user, using for example his thumb as a repeller and / or lever arm to pass this hard point.
• the invention also proposes a cutting blade for material of cardboard sheet or corrugated cardboard, comprising a thread 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 Dl and D2 varies along said thread.
• the net has a first zone with cutting portions of a first length Dl called large, followed by a second zone of length Dl ', smaller than Dl.
• the cutting blade is arranged to allow the formation of precut lines of the type described above.
• the side walls adjacent to the first wall are integral with the bottom wall by means of at least one frangible pre-cut portion, for example substantially rectangular, which can be detached by simple pulling and / or one or more bonding points which can be removed manually by single pull;
• the frangible pre-cut portions are cut in an open line relative to the edge of the flap and / or the corresponding flap.
• the invention also provides a blank making it possible to obtain the box as described above.
• the invention also proposes a blank of cardboard or corrugated sheet material for the manufacture of a packing case, of the type comprising at least four rectangular flaps, said rectangular flaps comprising a first flap intended to form a first side wall. of the body, connected by a first junction line to a second flap intended to form the bottom of the body, and respectively by second, third and fourth lines of junction with panels adjacent formed by one or more flaps and at least a third flap, and a fourth rectangular flap intended to form a second side wall of the box opposite to the first wall, characterized in that the second flap has two lateral flaps and a flap d end, in that the first, second, third and fourth junction lines are precut and in that the fourth flap or the end flap of the second flap comprise at least one frangible portion precut.
• 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 body and the fourth junction line is a line connecting the first flap to a third flap intended to form the top of the body;
• 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 the less partially the top of the body;
• the side flaps of the second part are each provided respectively with a frangible portion precut, for example substantially rectangular; - the pre-cut frangible 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 pre-cut portions 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 pre-cut frangible portion
• the fourth junction line is hat-shaped on 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.
• FIG. 1 is a plan view of a blank according to a first embodiment of the invention.
• - Figure 2 is a plan view of another embodiment of the flaps of the second flap of the blank of Figure 1.
• - Figure 3 is a plan view of another embodiment of the flaps of the second flap of the blank of Figure 1.
• FIG. 4 is a block diagram of 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 continuously to form blanks according to Figure 1.
• FIG. 6 is a plan view of another embodiment of blank according to the invention.
• FIG. 7 is a block diagram of the formation of a packing case from the blank of Figure 1, by coating the load with the blank.
• FIG. 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.
• FIG. 10 is a curve giving the variation of the tearing force of an attachment point for a particular type of cardboard.
• FIG. 11 shows a cutting blade according to an embodiment of the invention and a packaging wall after cutting.
• FIG. 12 shows a progressive profile cutting blade according to another embodiment of one invention.
• the same reference numbers will be used to designate the same elements.
• Figure 1 shows a blank 1 of double-sided corrugated cardboard, for example 3 mm thick.
• the blank is formed by a series of four rectangular shutters
• the suite comprises a first flap 2 intended to form a side wall of the body, connected by a first junction line 6, combined with a fold line between flaps, to a second flap 3 intended to form the bottom of the body, 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 flap 2 is also connected to a third rectangular flap 4, by a fourth junction line 9 constituted by a hat-shaped line.
• Line 9 straddles fold line 12, parallel and located on the side opposite to fold line 6 to form the opposite edge of the body.
• the suite includes a fourth rectangular flap intended to form the wall of the body opposite the first wall 2.
• junction line 9 makes it possible to determine two rectangular or trapezoidal parts 13 and 14, of flap, located on either side of a central portion 15 in trapezoidal shape, straddling the line and comprising a part located on the third flap 4, terminated by an opening or recess 16 produced in said third flap intended to form the top of the box.
• Line 15 therefore has a shape of ⁇ or cap.
• the recess is for example rectangular and / or triangular, and allows the user to pass one or more fingers so as to tear off the first wall formed by the first flap 2.
• Each of the flaps 3, 4 and 5 also comprises on either side and in the extension of the two flaps 10 and 12 of the first flap 2, rectangular or substantially rectangular flaps, respectively 17, 18; 19, 20 and 21, 22 adapted to cooperate once the body formed with the flaps of the first flap so as to form opposite openwork side walls of the body.
• the second 3 flap comprises on the side opposite to the first flap a set 23 of three rectangular or substantially rectangular flaps, namely a central flap 24 connected to the second flap by a fold line 25 and two small end flaps 26 connected respectively by fold lines 27 situated in the extension or substantially in the extension of the line of folding 25, to the two lateral flaps 17 and 18 of the second flap 3.
• These two side flaps 17 and 18 each have, respectively, on the side of the first flap 2, a frangible portion precut 28, 29 along an open line with one side 30, 31 entirely free towards the outside of the flaps of a part and towards the first part on the other hand.
• the fourth flap 5 comprises meanwhile on its outer edge 32 located on the side opposite to the third flap 4 a frangible pre-cut portion 33, for example rectangular or trapezoidal, adapted to cooperate with the central flap 24 of the second flap 3.
• This pre-cut portion 33 is extended towards the flap 5 by a recessed part 34 in said fourth flap 5, for gripping the wall, to allow easy tearing off once the blank is shaped to form a package.
• FIG. 2 thus shows a second flap 3 provided with two lateral flaps 17 'and 18', each provided with an end flap 26.
• the two flaps 17 'and 18' are each provided with two partially precut portions 35 and 36 , 37 and 38, rectangular or substantially rectangular, symmetrical two by two with respect to the longitudinal axis 39 of the blank.
• the portions 35 and 37 are located at the end of the flaps directed towards 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 on two sides, which makes it possible to provide a portion 39, 40 recessed in the flap 17 ', 18' towards the flap 3.
• Figure 3 shows another embodiment of the flaps 17 '', 18 '' of the second part 3 according to the invention.
• Each flap is provided with two precut portions 28 'and 29', of the type of the portions 28 and 29 described with reference to FIG. 1, and two other precut portions 41 and 42, free only on the side coincident with the outer edge of the flap .
• the flaps 17 '', 18 '' are not provided with small end flaps.
• the central flap 43 of the flap 3 which comprises two small tabs or flap 44 at the end, which will be able to be folded down to form a box according to the invention.
• FIG. 4 giving a block diagram 45 of a first embodiment of formation of the box obtained with the blank 1 described above.
• the blank is opened at 46, then set to square (step 47).
• the load 48 is introduced laterally into the packaging, as shown in 49, then the side flaps intended to form the side walls of the box are folded down after pre-gluing, for example with hot-melt glue, in particular portions 28, 29 partially precut, so as to form the box as shown at the end of training at 50.
• the box is then transported and brought, for example, to a supermarket.
• the wall formed by the first flap 2 is then torn off (step 51) manually by a user, which the latter can easily do taking into account the precut junction lines, then the packaging is placed on the shelf (not shown).
• the lower part 52 forming the bottom is detached at the level of the precut portions 28, 29 by spacing outwards in the direction of the arrow 53 (step 54).
• the shovel-shaped bottom 52 is then extracted from below, by the user who retains by manually pushing the top or the top part 55 of the body and the load 48.
• Figure 5 shows a set 56 of blanks 1, l ', 1''as described with reference to Figure 1, which can be easily manufactured from the same width of cardboard, continuously.
• the precut junction lines 6, 7, 8, 9 or the connection of precut portions 28, 29, 33 are obtained by perforating the cardboard in dotted lines with perforating spinning cutting blades.
• the dotted lines are therefore defined by an alternation of perforated lines and non-perforated lines called attachment points.
• a perforating profile is therefore defined by the two digits corresponding to Dl and D2.
• Dl and D2 are varied until the best possible compromise is found to allow easy tearing while retaining sufficient strength. packaging.
• Dl and D2 are thus varied on the same precut line to create more fragile points or hard points as indicated above.
• Figure 6 shows another embodiment of blanks 57, 57 'embedded in opposition, continuously manufactured from the same width of cardboard.
• the first flap 58 here comprises two flaps 59 and 60, symmetrical with respect to the longitudinal axis 61 of the blank and each formed by a first rectangular part and a second trapezoidal part or substantially triangular of greater height than 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 flap intended to form the bottom of the packaging are small rectangular flaps located on the periphery of said second flap.
• the two lateral flaps 63 are extended by a small tongue 65, the central flap 64, at the end, being for example of the same width as the lateral flaps 63.
• the third flap 62 and the fourth flap 66 each have on either side two large rectangular or substantially rectangular flaps 67, 68, intended to form when they are glued together, and with the flaps of the first and second flaps, the two other side walls of the body.
• FIG. 7 shows another embodiment of the formation of a package from a blank 1 according to the invention.
• the blank 1 is not pre-cut as described with reference to Figure 4, but brought flat (step 70).
• the load 71 can either be pistoned (mode not shown), or brought laterally onto the blank (step 72), before folding the blank around the packaging by coating as shown in 73, the load resting on top of the packaging or third part 4.
• the packaging is then finished as shown at 74 in FIG. 7, the flaps 10, 11; 21, 22, then 17, 18, 19, 20 being folded down after gluing, the second flap 3 suitable for forming the bottom of the packaging, being folded down on the load, its central end flap 24 being glued to the precut portion 33 of the fourth part 25 as indicated in 75.
• FIG. 8 shows another embodiment of a blank 80 according to the invention comprising a first flap 81 connected by first, second, third and fourth precut junction lines 82, 83, 84, 85 respectively to a second shutter 86, a third shutter 87 and a fifth shutter 88, the second shutter 86 being intended to form the bottom of the body and being for example identical to the second shutter described with reference to FIG. 1.
• the third and fifth flaps 87, 88 are located on either side of the first flap 81, with which they are connected by the second and third pre-cut junction lines merged with the fold lines, the fourth junction line 85 being in turn astride a fold line 89 of junction with a rectangular flap 90 to form portions identical to portions 13, 14, 15 and a recess identical to one recess 16 of the blank of FIG. 1.
• a fourth flap 91 is provided at the end of the fifth flap 88 and includes the precut portion 92, identical to the portion 33 according to the invention, which will be glued to the end flap 93 of the second flap.
• the fourth flap further includes an end tab 94 for bonding with the third flap 87
• each of the third, fourth and fifth flaps 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 box.
• the flaps 95 and 97 are symmetrical with respect to the first flap 81 and comprise, for example, a recess at the angle situated on the side of the flap 90 of the first flap, of shape complementary to the portion 15.
• FIG. 9 shows the formation of a box 98 according to the invention from a blank 80 of the type described with reference to FIG. 8.
• the blank is first brought flat and then preformed into shape belt, the tongue 94 being glued to the third flap 87, the bottom 86 of the body being brought down and then glued.
• the box is then tilted open (step 99), the load 100 then being introduced before closing the flaps 90, 96 then 95, 97 to constitute the top of the box.
• FIG. 10 shows a curve 101 giving the variation of the tearing force of an attachment point for a profile 10.
• the force is 9.3 N
• 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.
• the zone 105 comprises cut portions 107 of a first length D1, and attachment points 108 of a first length D2.
• the second zone 106 comprises cut portions 109 of a second length Dl 'which is smaller than Dl, for example twice as small, and attachment points 110 of the same length D2 as the attachment points 108.
• FIG. 11 also shows the rectilinear cutting blade 111 comprising a thread 112 of shape arranged to cut the partially precut line 104 and fixed on a rigid support 113, in a removable manner to allow an easy change.
• FIG 12 gives an enlarged side view of another embodiment of the cutting blade 114 according to the invention.
• the blade comprises a rectilinear thread which here comprises four zones, of progressive tearing difficulty, namely a first zone 115, of easy tearing, a second zone 116 of less easy tearing, a third and a fourth zone 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 of 5 mm, and finally the fourth zone 117 'comprises cutting portions
• the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all of its variants and in particular those where the precut portions belong in part to the flaps of the first and not of the second flap.

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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)

Applications Claiming Priority (5)

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• 2000
  • 2000-05-29 CA CA002374569A patent/CA2374569A1/fr not_active Abandoned
  • 2000-05-29 ES ES00936970T patent/ES2184717T3/es not_active Expired - Lifetime
  • 2000-05-29 JP JP2001503334A patent/JP2003502220A/ja active Pending
  • 2000-05-29 AU AU52276/00A patent/AU763170B2/en not_active Expired
  • 2000-05-29 AT AT00936970T patent/ATE228086T1/de not_active IP Right Cessation
  • 2000-05-29 PT PT00936970T patent/PT1093433E/pt unknown
  • 2000-05-29 DE DE60000814T patent/DE60000814T2/de not_active Expired - Lifetime
  • 2000-05-29 WO PCT/FR2000/001468 patent/WO2000076856A2/fr active IP Right Grant
  • 2000-05-29 NZ NZ516586A patent/NZ516586A/xx not_active IP Right Cessation
  • 2000-05-29 EP EP00936970A patent/EP1093433B1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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