EP2345591A1 - Coffret de conteneur pliable doté d'une partie inférieure rétractable - Google Patents

Coffret de conteneur pliable doté d'une partie inférieure rétractable Download PDF

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Publication number
EP2345591A1
EP2345591A1 EP10150816A EP10150816A EP2345591A1 EP 2345591 A1 EP2345591 A1 EP 2345591A1 EP 10150816 A EP10150816 A EP 10150816A EP 10150816 A EP10150816 A EP 10150816A EP 2345591 A1 EP2345591 A1 EP 2345591A1
Authority
EP
European Patent Office
Prior art keywords
panels
blank
cornering
side panels
foldable
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.)
Withdrawn
Application number
EP10150816A
Other languages
German (de)
English (en)
Inventor
Bas Van Riel
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.)
SCA Packaging Tilburg
Original Assignee
SCA Packaging Tilburg
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
Application filed by SCA Packaging Tilburg filed Critical SCA Packaging Tilburg
Priority to EP10150816A priority Critical patent/EP2345591A1/fr
Publication of EP2345591A1 publication Critical patent/EP2345591A1/fr
Withdrawn legal-status Critical Current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
    • B65D5/36—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections
    • B65D5/3607—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank
    • B65D5/3614—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank to form a tubular body, at least one of the ends of the body remaining connected
    • B65D5/3621—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank to form a tubular body, at least one of the ends of the body remaining connected collapsed along two fold lines of the tubular body

Definitions

  • the present invention relates to a container which is foldable from a flat, double-folded format into a three-dimensional container box wherein a bottom part is automatically formed. It also relates to a specific blank which is used for forming such a container, and a method of producing the foldable container from such blank.
  • Foldable containers mainly made from cardboard or corrugated cardboard blanks, are known in the field.
  • Such a container usually consists of side panels, bottom panels and top panels which are all present in the blank before the product is folded.
  • the side panels are used as the vertical walls of the box and form together a rectangular tube.
  • the top and bottom panels are folded such that they form a closed top and bottom surface. Boxes used for removal purposes require the user to fold the bottom and top by hand.
  • Such a product can be unfolded from its flat folded state into a three dimensional container wherein the side panels are brought into a tubular rectangular relationship, and the inside folded bottom panels automatically spread out to form a bottom surface.
  • the folded product itself entails quite a stack of panels folded over each other, because it comprises two layers of side panels between which at least two layers of bottom panels are folded; thus at least four layers of panels are stacked in the flat folded product.
  • these structures of container boxes are used for cigarette boxes.
  • the multiple folded structure inherently deviates from a perfectly flat folded structure which compromises their storage and stacking.
  • a further aim is to develop such a container box which is easy in use, and which may be used as a single-use packaging for pellet loads (1000 x 1200 mm.).
  • it an aim of the invention to develop a simple production method for such a container box based on known production machines.
  • a non-folded blank is developed according to the claims, the blank being suitable to be formed into a container box.
  • the invention in a first aspect relates to a blank for a three-dimensional container box which is flat-foldable and has an automatically folding bottom part, the blank having a vertical and a horizontal dimension, comprising a horizontal row of four side panels and a horizontal row of four bottom panels adjacent to the side panels, the side panels being foldable with respect to the bottom panels over a horizontal fold line, and the individual side panels being foldable with respect to each other over parallel vertical fold lines, the individual bottom panels are foldable with respect to each other over cornering fold lines which extend from a top corner of the bottom panel to the edge of the bottom panel, the cornering fold lines having an oblique orientation with respect to the horizontal and vertical fold lines, and wherein two neighbouring bottom panels share one cornering fold line by which they form a pair of retractable cornering bottom panels in the three-dimensional container box.
  • the cornering fold lines have preferably an angle of 45° with respect to the horizontal and vertical fold lines. This angle, as will be shown in detail below, achieves that, when the container box formed from this blank is in its unfolded state, the side panels adapt mutual corners of 90°, while a flat bottom part is automatically formed by a retraction movement which is concomitant to the unfolding movement.
  • the angle of the cornering fold line determines the angle under which the adjacent side panels will be placed, according to the relationship: the angle with the horizontal fold line is half of the angle between neighbouring side panels.
  • the unfolding, or folding open, of the flat folded container made from the blank of the invention is a combined movement which includes the retraction of the bottom panels into one assembled bottom part.
  • This combined movement makes the container very easy to be formed into its three dimensional state, even when used in large dimensions for pellets. There are no specific handlings needed in forming the bottom part.
  • Folding lines are for the sake of clarity lines having a weakened resistance to folding, e.g. by compressing the material along that line using a roller.
  • the bottom panel comprises a cut-out slot.
  • This feature helps and eases the automatically forming of the bottom, in that less blank material is present in the bottom corners of an unfolded container box. The automatically forming of the bottom is thus less hindered by accumulation of blank material in the bottom corners.
  • cut-out slot may alternatively be comprised in the neighbouring bottom panel that shares the cornering fold line. Also a combination is comprised in the invention.
  • the bottom panels are divided in neighbouring pairs by an incision extending over the vertical width of the bottom panels which are separated.
  • two pairs of two bottom panels are formed, each pair sharing one cornering fold line.
  • the retraction movement of the bottom panels is thus dependent of only two cornering fold lines, which assures a simple operation of the retraction movement.
  • all bottom panels are divided individually by an incision extending over the vertical width of the bottom panels which are separated.
  • the method of producing the flat folded container allows that neighbouring pairs of bottom panels are attached to each other in an attachment step. For that reason, the invention also comprises this alternative.
  • the incision per pair is a two dimensional cut-away part extending over the vertical width of the bottom panels which are separated.
  • a triangular shape of a cut-away part which is defined along two cutting lines: one cutting line follows the vertical fold line between two adjacent side panels over the vertical width of the bottom panels, and the second cutting line is a line oblique to the vertical and horizontal fold lines and crosses the first cutting line, preferably in the upper corner of the bottom panel.
  • the cut-away part supports the automatic retraction of the bottom panels into a flat bottom part: it reduces the overlapping areas of bottom panels that are retracted together into an assembly forming the bottom part.
  • each bottom panel shares a cornering fold line with both its neighbouring bottom panels. This alternative allows the same automatic retraction of the bottom panels, and relies on four cornering fold lines which makes the bottom structure stronger.
  • one outer side panel comprises a connecting strip for connecting with the opposite outer panel.
  • the blank is intended to be formed into a rectangular tubular shape, which necessitates all four side walls to be consecutively connected together during the formation process.
  • a connecting strip which may extend over the full vertical width of the side panel, is expedient.
  • the strip can be used to apply glue upon, and be pressed against the opposite outer panel.
  • the connecting strip may be applied as a separate part (i.e. not part of the blank) during the formation process.
  • the invention relates to a method of forming a three-dimensional container box which is flat foldable, comprising:
  • This method is less complicated than known processes for forming a flat folded box having a automatically forming bottom part.
  • the method relies on one main step of folding along one direction (i.e. the vertical direction), which is combined with steps of glue application.
  • the method thus requires less equipment and less time because the bottom parts are not to be glued and pre-folded in a separate step.
  • the method is performed over a moving band conveyor which is commonly used in the field, and the conveyor is provided with glue applicators.
  • the flat folded product has only one direction of folding, instead of two, so that the product comprises less stacking of panel layers.
  • the product allows the application of thicker material for the blank, for instance cardboard may be used of 7 to 10 mm thickness. This allows the use of so-called 'heavy duty' cardboard, which is used for more demanding situations as regards the strength of the container.
  • the larger range of thickness for the process also allows the production of containers of larger dimensions which necessarily require a more thick material to obtain a required rigidity so that spontaneous collapsing of the box is prevented.
  • the invention also relates to a three-dimensional container box which is flat foldable and is obtainable by the method of the invention.
  • the invention relates to a three-dimensional container box which is flat foldable, comprising a blank according to the invention, wherein:
  • This container box is in its flat folded state easily stacked in large numbers because of its relative small thickness of two panel layers and its virtually planar character. From the stack, a user may immediately take one flat folded container, and in one single action, spread open the side panels which automatically are urged into a mutual relationship defined by the cornering fold lines. At the same time, the cornering fold lines together with the bottom connecting areas, urge the bottom panels to assemble into one bottom part.
  • the container thus unfolded may be used directly to place on a pellet and be filled with items to be packed.
  • the container When the container is applied in transportation for single-use ('one-way use'), the container does not need to be removed from the pellet, and the assembled bottom part does not need to be further strengthened in any way.
  • one outer side panel 8 is provided with a connecting strip 25 for connecting to the opposite outer side panel 8 to the right.
  • the bottom panels comprise further a folding line 28.
  • the line 28 may alternatively be in the form of an incision line.
  • a bottom corner connecting area 30 is present between folding line 12 and line 28.
  • Figure 2a shows a blank 1 of fig. 1 , with the same features as above.
  • the bottom corner connecting areas 30 are covered with glue which is suitable for attaching cardboard pieces together.
  • the connecting strip 25 is provided with glue.
  • the two outer side panels 8a and outer fold lines 10a are indicated in view of the process for producing the flat foldable container.
  • the two inner side panels are marked 8b.
  • Figure 2b shows a blank which is flat folded over its two outer fold lines 10a, so that the two outer side and bottom panels now overlap the two inner side and bottom panels.
  • the outer side panels 8a fully overlap the inner side panels 8b.
  • the connecting strip 25 is overlapped by the outer side panel 8a.
  • the product is held until the parts 25 and 30 provided with glue are fixedly attached to their opposing and contacting surfaces by the hardened glue.
  • Figure 2c shows the product obtained in figure 2b , wherein one side panel 8 is lifted so that the container is unfolded from its flat folded state into a 3-dimensional box. Because of the connecting areas 30, the bottom panels 9 are automatically urged to flip according to the arrows F so that all bottom panels 9 are folded over the horizontal fold lines 11 in such a way that they are retracted and assemble into one bottom panel which is perpendicular to the side panels 8.
  • Figure 3 shows a top-view of the bottom panels at the inside of the box, when unfolded into its final form of a rectangular box, subsequent to the unfolding stage shown in figure 2c .
  • the side panels 8 (not shown) of the box are brought into a rectangular orientation, so that all neighbouring side panels 8 are in a perpendicular orientation to one another.
  • the bottom parts of the box are formed by the folded bottom panels 9, which are retracted, folded, and partly overlap.
  • Each pair has a common cornering folding line 12 which urges each pair in perpendicular orientation towards the side panels when the box is unfolded.
  • the oblique incision lines 22 limiting the 9IA and 9IIA panels are chosen such that the respective incision lines border on each other in the final unfolded state of the box. Effectively these panels do not overlap which assures an easy unfolding.
  • the opposite side of the bottom part of the box is formed by the two retracted bottom panels 9IB and 9IIB which are bordering on each other at the dotted line 40. Effectively these two rectangular bottom panels cover the whole bottom of the box at the outside.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
EP10150816A 2010-01-15 2010-01-15 Coffret de conteneur pliable doté d'une partie inférieure rétractable Withdrawn EP2345591A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10150816A EP2345591A1 (fr) 2010-01-15 2010-01-15 Coffret de conteneur pliable doté d'une partie inférieure rétractable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10150816A EP2345591A1 (fr) 2010-01-15 2010-01-15 Coffret de conteneur pliable doté d'une partie inférieure rétractable

Publications (1)

Publication Number Publication Date
EP2345591A1 true EP2345591A1 (fr) 2011-07-20

Family

ID=42102147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10150816A Withdrawn EP2345591A1 (fr) 2010-01-15 2010-01-15 Coffret de conteneur pliable doté d'une partie inférieure rétractable

Country Status (1)

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EP (1) EP2345591A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019127917A1 (de) * 2019-10-16 2021-04-22 Smurfit Kappa Gmbh Faltbodenschachtel mit Automatikboden sowie maschinelles Herstellungsverfahren dafür

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357278A (en) * 1999-12-16 2001-06-20 Field Group Plc Cartons
US6557749B1 (en) * 2001-12-19 2003-05-06 Georgia-Pacific Corporation Sheet material container erectable from precursor with auto-forming end closure
WO2004041525A2 (fr) * 2002-11-05 2004-05-21 International Paper Company Caisse a vrac dotee d'un fond a fermeture automatique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357278A (en) * 1999-12-16 2001-06-20 Field Group Plc Cartons
US6557749B1 (en) * 2001-12-19 2003-05-06 Georgia-Pacific Corporation Sheet material container erectable from precursor with auto-forming end closure
WO2004041525A2 (fr) * 2002-11-05 2004-05-21 International Paper Company Caisse a vrac dotee d'un fond a fermeture automatique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019127917A1 (de) * 2019-10-16 2021-04-22 Smurfit Kappa Gmbh Faltbodenschachtel mit Automatikboden sowie maschinelles Herstellungsverfahren dafür

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