EP1259437B1 - One-piece blank for a folding packaging unit - Google Patents

Abstract

The one-piece blank for a collapsible packing unit has a rectangular bottom(1) to which are connected sections(12a,12b) bounded by parallel running fold line pairs(4a,4b,4c,4d), a third inner side flap(5) connected to a long side of the bottom by a section(12c) bounded a parallel running fold line pair(4e,4f), and a first outer side flap(6) connected to the long side of the bottom by a section(12d) bounded by another fold line pair(4g,4h). The fold line pairs have the same spacing determining the internal height of the packing unit. An independent claim is included for a packing unit used as a protection against moisture.

Description

The invention relates to a one-piece blank for forming a hinged packaging container from a foldable material such as cardboard or cardboard, in particular for packaging flat objects such as a stack of sheets of paper, and using such a one-piece blank a packaging unit protected against moisture.

A large number of blanks for packaging are known, in some cases also blanks which consist of a single blank and do not have to be glued to form packaging containers formed from them.

From DE 91 05 189 U 1 , for example, a one-piece blank for a foldable packaging is known which, for packaging books, preferably has two inside and outside flaps opposite one another. The two inside flaps are to be combined by a tab arranged on one of the flaps to form a tension bridge that is integral with the packaged goods. The tab is designed such that when force is exerted on the tensioning bridge, its tensioning height can be changed relative to the base area of the packaging.

For the packaging of copy paper, for example, DE 298 22 246 U 1 proposes a one-piece blank for a folding box, the front wall, bottom and rear wall of which are connected to one another by folding lines and the front and rear walls of which each carry side panels, the width of which is approximately half as large is large, as is the distance between the front and rear walls. The bottom of this folding box has a folding flap on both sides. The side panels are folded over to form side walls opposite the front and rear wall and covered in their lower area by the folding flaps of the floor and glued to them. A lid flap is attached to the upper edge of the rear wall, which extends to the front wall and carries a flap there, which can either be glued to the front wall or inserted into the folding box.

From FR-A-2 145 836 a blank of corrugated cardboard for the packaging of disc-shaped packaging goods (records) is known, which has a rectangular central part provided with an insertion opening, two with a fold line and one the narrow sides of the central part articulated, opposite first and second inner flap, a rectangular outer part flap articulated via a section on one of the two longer sides of the central part and a third inner side flap which is connected via a trapezoidal section to the other long side of the central part and on whose narrow sides are hinged side flaps. The disc-shaped packaging material is placed on the third inner flap, the side flaps are folded over the packaging material for centering, after which the third inner flap is folded onto the central part, so that the packaging material is placed in its center. A tab attached to the free end of the outside flap serves to close the packaging container and is inserted into the insertion opening in the central part. The use of corrugated cardboard for the production of the packaging container has the effect that the tab inserted between the outside flap and the packaging material does not lie against the outside flap when the packaging container is closed and forms a type of compensation spring for the packaging material. An incision in the flap, in combination with a fold line provided on both sides, causes the incision to protrude with a slight fold and catches on the edges of the insertion opening located in the bottom.
The disadvantage of the known packaging container is that processing on high-speed packaging machines is ruled out due to the complicated folding processes, in particular when inserting and centering the packaged goods and folding the multi-part inside flap. The locking mechanism also prevents the packaging container from being opened easily, since there is a risk of the hooking tab that the packaging container is damaged or even destroyed when it is opened for the first time.

From the prior art according to FR-A-1 510 190 , on which the preamble of claim 1 is based, a packaging container which is particularly suitable for fragile packaging goods or books is known. For its manufacture, two opposite corners are first cut off from a square arch, whereby a blank with an equally square bottom is produced. Via sections hinged to the four sides of the base, which form the two side walls and the front and rear walls in the erected packaging container, the base is also a square outer side flap, opposite it is a triangular inner side flap and side portions hinged to the other two sides of the base are formed in the form of isosceles trapezoids, with the trapezoidal side sections only over half the length of their base line are connected to the square bottom. An imaginary diagonal through the square arch leads centrally through an opening made in the floor, which is located adjacent to the side of the floor to which the triangular inner flap is hinged. The trapezoidal side sections each have a pair of fold lines in the middle, so that they can be congruent with one another and have the shape of irregular trapezoids, in which a right angle is applied to the side sections which are adjacent at one end to the square outer side flap. The second right angles of the irregular trapezoids are almost in the folded state on the imaginary diagonal of the arch.
The folding of the trapezoidal side sections of the blank creates a packaging container which is initially still open on one side, in which the folded side sections form a special interior for receiving the packaging material, which can be expanded by applying pressure to the halves of the folded trapezoids below to insert the packaging material. For this purpose, notches are provided in the trapezoidal halves of the packaging container. After inserting the packaging material, the packaging container is closed on one side by the triangular inside flap. The packaging container is finally closed by means of a square outer flap which is articulated on the opposite side of the floor. At its end opposite the floor there are three sections separated by two fold lines, but otherwise free of incisions or impressions. The middle section is adjoined by a locking tongue which has two wings at its outer end and is to be inserted into the opening in the bottom.
A packaging container which is double-walled except for the side walls is obtained, which, because of its square interior, is unsuitable for the rectangular format of paper sheets common worldwide. The cost of materials required for packaging paper sheets also appears to be too high. Another disadvantage is that processing on high-speed packaging machines is not possible. In this known packaging container, too, a closure mechanism is used with the closure tongue to be inserted into the opening, the two wings of which get caught in the opening, which hinders easy and in particular non-destructive opening of the container.

From US-A-3 758 019 a container for packaging garments is known which has a rectangular bottom. The one opposite the floor The wall of the packaging container, i.e. the lid, is formed from two lateral lid sections and an upper and a lower outside flap. The upper and lower outer side flaps are articulated on opposite sections which are provided to form the front and rear walls and which in turn are articulated on the floor. The side cover sections are designed in the form of irregular octagons for receiving corresponding shapes of the upper outer side wall. Tabs extend the sections forming the side walls and, when the packaging container is unfolded, represent a partially double lower front wall starting from the two side walls. At the ends of the section forming the front wall there are hook-shaped closure elements for connection to corresponding incisions in the side walls. The upper outside flap is designed in the form of a hexagon onto which a pentagon is placed, the baseline of the pentagon being shorter than the side of the hexagonal outside flap that is opposite the side hinged to the front wall. The lower outside flap is pentagonal and has a tongue at its tip for insertion into an incision located on the upper outside flap.
The elaborate construction of the blank with its multitude of tabs, sections and closure elements precludes mechanical unfolding of the blank and automatic filling of the packaging container, as well as simple handling, which is intended to mean easy and non-destructive opening and reclosing of the container.

The object of the present invention is to propose a one-piece blank for a packaging container which can be produced inexpensively without major cutting losses, which can be produced and filled automatically on standard packaging machines by unfolding the blank, and an optimized protection of the contents from dirt and mechanical impairment with a given minimum protection of the Content is guaranteed to be extremely wet and is particularly easy to handle, which in particular means that the packaging container can be resealed and that the packaging container can be opened easily without destroying it.
Another object of the invention is a further increase in protection of the packaging container with its contents from moisture and great moisture, packaging units of this embodiment also having an original seal which provides effective protection until they are removed by the end user Theft of individual sheets of paper forming the content from the packaging units and virtually eliminates both contamination and kinking of the sheets after they have been filled into the packaging unit by the manufacturer.

• a) einem rechteckigen Boden,
• b) einem darin angebrachten geradlinigen Einschnitt, der teilweise zu einer länglichen Öffnung verbreitert ist, deren eine Begrenzungslinie von dem Einschnitt gebildet ist,
• c) einer ersten und einer zweiten Innenseitenklappe, die an den sich gegenüberliegenden und rechtwinklig zum geradlinigen Einschnitt verlaufenden ersten und zweiten Seiten des Bodens angebracht sind und
• d) die über durch ein erstes bzw. zweites parallel verlaufendes Faltlinienpaar begrenzte Abschnitte mit dem Boden verbunden sind,
• e) einer dritten Innenseitenklappe, die über einen durch ein drittes parallel verlaufendes Paltlinienpaar begrenzten rechteckigen Abschnitt mit einer dritten Seite des Bodens verbunden ist, die parallel zum geradlinigen Einschnitt und diesem benachbart verläuft,
• f) einer ersten Außenseitenklappe, die über einen durch ein viertes parallel verlaufendes Faltlinienpaar begrenzten Abschnitt mit einer vierten Seite des Bodens verbunden ist, die der mit der dritten Innenseitenklappe über den durch das dritte parallel verlaufende Faltlinienpaar begrenzten Abschnitt verbundenen dritten Seite gegenüberliegt,
• g) wobei die ersten vier Faltlinienpaare den gleichen und die Innenhöhe des Verpackungsbehältnisses bestimmenden Abstand aufweisen,
• h) einer sich verjüngend ausgebildeten zweiten Außenseitenklappe, die über einen durch ein fünftes parallel verlaufendes Faltlinienpaar begrenzten Abschnitt mit der ersten Außenseitenklappe verbunden ist,
• i) wobei die zweite Außenseitenklappe an ihrem dem fünften Faltlinienpaar gegenüberliegenden Endbereich eine erste Falzlinie und eine dazu parallel verlaufende zweite Falzlinie aufweist sowie
• j) einer plan ausgebildeten Einstecklasche, die
  • zum Verschluss des Verpackungsbehältnisses in die Öffnung einführbar ausgestaltet ist,
  • die sich zu ihrem freien Ende hin verjüngt, und
  • die über die gesamte Länge ihres dem freien Ende gegenüberliegenden anderen Endes über die zweite Falzlinie mit der Außenseitenklappe angelenkt verbunden ist,
  wobei den erfindungsgemäßen Zuschnitt folgende Kombination weiterer Merkmale derart kennzeichnet, dass
• k) die erste und zweite Seite des Bodens eine geringere Länge aufweisen als die dritte und vierte Seite des Bodens,
• l) die einwandig ausgebildeten Innenseitenklappen in Form gleichschenkliger Trapeze einschnittfrei ausgebildet sind, wobei die Basislinien dieser Trapeze einschnittfrei und jeweils über ihre gesamte Länge den den Trapezen zugewandten Faltlinien der ersten drei parallel verlaufenden Faltlinienpaare entsprechen, wobei die Innenseitenklappen über die den Trapezen zugewandten Faltlinien mit den durch die ersten drei Faltlinienpaare begrenzten Abschnitte verbunden sind,
• m) die erste Außenseitenklappe rechteckig ausgebildet ist,
• n) der Abstand des fünften Faltlinienpaars größer als der Abstand der ersten vier Faltlinienpaare ist,
• o) die erste Falzlinie einschnittfrei in die zweite Außenseitenklappe eingeprägt ist,
• p) die Einstecklasche einschnittfrei ausgebildet ist und
• q) die Breite der Einstecklasche größer als die in Richtung des geradlinigen Einschnitts bemessene Länge der Öffnung und kleiner als die Länge des geradlinigen Einschnitts ist.

The task at hand is solved with a one-piece cut to form a hinged packaging container made of a foldable material such as cardboard or cardboard, with:

• a) a rectangular bottom,
• b) a rectilinear incision made therein, which is partially widened to form an elongated opening, a boundary line of which is formed by the incision,
• c) a first and a second inner side flap which are attached to the opposite first and second sides of the base and which run at right angles to the straight cut, and
• d) which are connected to the floor via sections delimited by a first or second pair of parallel folding lines,
• e) a third inner side flap which is connected via a rectangular section delimited by a third pair of parallel fold lines to a third side of the base which runs parallel to and adjacent to the straight cut,
• f) a first outer side flap, which is connected via a section delimited by a fourth pair of parallel fold lines to a fourth side of the base, which is opposite the third side connected to the third inner flap via the section delimited by the third parallel fold line pair,
• g) the first four pairs of fold lines being at the same distance and determining the inner height of the packaging container,
• h) a tapered second outside flap which is connected to the first outside flap via a section delimited by a fifth pair of folding lines running in parallel,
• i) wherein the second outside flap has at its end region opposite the fifth pair of fold lines a first fold line and a second fold line running parallel thereto and
• j) a flat insertion flap, the
  • is designed to be insertable into the opening for closing the packaging container,
  • which tapers towards its free end, and
  • which is connected to the outside flap over the entire length of its other end opposite the free end via the second fold line,
  the following combination of further features characterizing the blank according to the invention such that
• k) the first and second sides of the base are shorter than the third and fourth sides of the base,
• l) the single-walled inside flaps are designed without incisions in the form of isosceles trapezoids, the baselines of these trapezoids without incisions and over their entire length corresponding to the folding lines facing the trapezoids of the first three parallel folding line pairs, the inside flaps via the folding lines facing the trapezoids with the are connected by sections delimited by the first three pairs of fold lines,
• m) the first outside flap is rectangular,
• n) the distance between the fifth pair of fold lines is greater than the distance between the first four pairs of fold lines,
• o) the first fold line is embossed into the second outside flap without incisions,
• p) the insertion flap is free of incisions and
• q) the width of the insertion flap is greater than the length of the opening dimensioned in the direction of the straight cut and smaller than the length of the straight cut.

To produce a packaging container from a blank in accordance with the above statements, the sections delimited by the first two pairs of fold lines are first erected and the associated first two inside flaps are folded down relative to one another. Then the section delimited by the third pair of fold lines is erected and the associated third inside flap is folded over in the direction of the first outside flap. The section delimited by the fourth pair of fold lines is erected, then the first outside flap as the cover opposite the bottom is folded in the direction of the third inside flap. The fifth pair of fold lines is on the outside above the third after it has been folded over Fold line pair arranged, while the second outside flap is folded outside on the floor. The packaging container is closed by inserting the insertion flap into the elongated opening from the outside.

A further embodiment for solving the problem provides a blank, the first outside flap of which has a one-sided and seamless extension in the direction of its longitudinal sides compared to the embodiment described above. A reinforcing strip is articulated to the extended outside flap via a sixth folding line, openings being inserted in the first outside flap and in the reinforcing strip, which are positioned congruently one above the other after the reinforcing strip has been folded over by the sixth folding line onto the first outside flap and thus form a hanging opening ,
The first outside flap is extended by a smaller amount than the height of the reinforcement strip - measured in the direction of the long sides of the outside flap - corresponds.
So-called euro holes are preferably formed as openings in the first outside flap and in the reinforcement strip for using these openings as hanging tabs for a hanging dome as well as for a bracket holder, optionally with or without a price flap.

To produce a packaging container from a blank according to this embodiment, the reinforcement strip is first folded around the sixth fold line onto the first outside flap. The further steps correspond to those for the production of a packaging container without reinforcement strips.

In order to facilitate the opening of the packaging containers according to the invention, a semi-circular opening in the second outside flap that intersects the first fold line is proposed as the preferred embodiment.

In order to indicate the integrity of an original packaging, the invention provides, in a further embodiment, a sealing label, which is partially glued on the outside when the packaging container is closed, partly over the incision, on the second outside flap and partly on the floor.

In order to guarantee, in addition to optimized protection of the contents from dirt and mechanical impairment, particularly extensive protection of the contents from moisture and moisture, the invention provides in a particularly preferred embodiment a packaging unit in which a one-piece cut according to one of the embodiments explained above folded packaging container is shrunk into an outer packaging made of plastic film that completely encloses the packaging container. A plastic film is a polyolefin film which can be printed with the usual printing processes, in particular in its design as a flat or semi-tubular film, with a semi-tubular film being understood to mean a tubular film whose one side opening of the tube is closed.

A very particularly preferred embodiment provides a packaging unit in which a packaging container from a blank, which does not provide for the formation of a reinforcement strip, is shrunk with a plastic film onto which a hanging tab is glued.
So-called euro holes are preferred as an opening in the hanging flap for using this hanging flap for a hanging dome as well as for a bow holder, optionally with or without a price flap.

With the invention, an optimized packaging for flat objects such as a stack of paper sheets, in particular higher quality paper sheets such as inkjet papers, is achieved.
The packaging unit protects the sheets of paper for a long time from dirt, mechanical impairment and, in particular, from moisture and high humidity until the packaging is opened by the end user.
After the outer packaging has been removed and the packaging container has been opened, its resealability ensures the greatest possible protection of the paper sheets that are not used immediately from dirt and mechanical impairment with a minimum protection from moisture until all paper sheets are completely used up.

The invention is explained below with reference to the two schematic figures 1 and 2.

FIG. 1 shows a blank according to the invention with a rectangular bottom (1) and a rectilinear incision (2a), which is made parallel to its long sides and is partially widened to form an elongated opening (2b) oriented to the inside flap (5).
The sections (12a, 12b) and the two narrow sides of the rectangular bottom (1) are bounded on both sides, bounded by a first pair of parallel fold lines (4a, 4b) and a second pair of parallel fold lines (4c, 4d) in turn, the first two inside flaps (3a, 3b) without incisions.
A third inner flap (5) without incisions is connected to the one long side of the bottom (1) via a section (12c) delimited by a third pair of fold lines (4e, 4f) running in parallel.
With the other long side of the bottom (1), which is opposite the long side of the bottom connected to the inside flap (5) via section (12c), is a first via a section (12d) delimited by a fourth pair of fold lines (4g, 4h) running in parallel rectangular outside flap (6) connected.
Opposite to section (12d), the outside flap (6) is connected to a section (13) delimited by a fifth pair of folding lines (8a, 8b) running parallel, to which a second outside flap (7) is connected. The distance between the fold lines within the fifth pair of fold lines (8a, 8b) is greater than the distance between the two fold lines within the first four pairs of fold lines.
The outside flap (7) is followed by a flat insertion flap (9) articulated via a second fold line (10b) over its entire length, the insertion flap (9) being larger in width than that dimensioned in the direction of the incision (2a) Length of the opening (2b) and less than the length of the incision (2a). The insertion tab (9) tapers towards its free end. To optimize the flexibility of the articulation of the insertion flap (9), a first fold line (10a) is embossed into the second outside flap (7) parallel to the second fold line (10b) and is not narrower than the first fold line (10b). In order to prevent the inserted insertion flap (9) from getting caught in the opening (2b), the insertion flap (9) is connected to the outside flap (7) without incisions.

The outside flap (7) is tapered. The width of the outside flap (7) on its side adjacent to the section (13) delimited by the fifth pair of fold lines (8a, 8b) corresponds to the length of these fold lines, while the opposite side is narrower, but does not fall below the width of the insertion flap.
The inner height of the packaging container thus formed is determined by the distance between the two fold lines within the first four pairs of fold lines.

According to FIG. 2, in the context of a further embodiment, the first outside flap (6) is extended on one side in the direction of its long sides, the lengthening being less than the height of the reinforcement strip (14) which is connected to the outside flap via the fold line (16) (16). 6) is connected in an articulated manner, openings (15a, 15b) each being recessed symmetrically to the fold line (16) in the outside flap (6) and in the reinforcement strips (14). The height of the reinforcing strip (14) is the extent of this in the direction of the longitudinal side of the outside flap (6).

An embodiment taken into account both in FIG. 1 and in FIG. 2 provides that a semicircular opening (11) is formed in the second outside flap (7), the straight base of which is parallel to the fold line (10a) between the two fold lines (10a, 10b) runs and the opening interrupts the course of the first fold line (10a).

list of Terms

1:

ground

2a:

incision

2 B:

elongated opening

3a

1. Inside flap

3b:

2. Inside flap

4a, 4b:

1st pair of fold lines

4c, 4d:

2nd pair of fold lines

4e, 4f:

3rd pair of fold lines

4g, 4h:

4th pair of fold lines

5:

3. Inside flap

6:

1. Outside flap

7:

2. Outside flap

8a, 8b:

5th pair of fold lines

9:

tuck

10a:

1st fold line

10b:

2nd fold line

11:

semicircular opening

12a:

Section delimited by the first pair of fold lines

12b:

section bounded by the second pair of fold lines

12c:

Section delimited by the third pair of fold lines

12d:

section delimited by 4th pair of fold lines

13:

section delimited by 5th pair of fold lines

14:

reinforcement strips

15a:

Opening in reinforcement strips

15b:

Opening in the 1st outside flap

Claims (7)

1. One-piece blank for forming a folding packaging container from a pliable material such as card or paperboard, especially for packaging flat articles such as a stack of paper sheets, having

   a) a rectangular base (1),

   b) a rectilinear incision (2a) made therein, which is partially widened to form an elongate opening (2b), the boundary line of which is formed by the incision (2a),

   c) first and second inside flaps (3a) and (3b), which are disposed on the opposite first and second sides of the base (1) extending at right angles to the incision (2a) and

   d) which are joined to the base (1) by way of portions (12a, 12b) defined respectively by a first pair of fold lines (4a, 4b) extending in parallel and by a second pair of fold lines (4c, 4d) extending in parallel,

   e) a third inside flap (5), which is joined to a third side of the base (1), which extends parallel and adjacent to the incision (2a), by way of a rectangular portion (12c) defined by a third pair of fold lines (4e, 4f) extending in parallel,

   f) a first outside flap (6), which is joined to a fourth side of the base (1), which lies opposite the third side joined to the third inside flap (5) by way of the portion (12c) defined by the third pair of fold lines (4e, 4f) extending in parallel, by way of a portion (12d) defined by a fourth pair of fold lines (4g, 4h) extending in parallel,

   g) the first four pairs of fold lines (4a, 4b), (4c, 4d), (4e, 4f) and (4g, 4h) having a spacing that is the same and determines the internal height of the packaging container,

   h) a second outside flap (7) of tapering construction, which is joined to the first outside flap (6) by way of a portion (13) defined by a fifth pair of fold lines (8a, 8b) extending in parallel,

   i) the second outside flap (7), at its end region lying opposite the fifth pair of fold lines (8a, 8b), having a first fold line (10a) and, extending parallel thereto, a second fold line (10b), as well as

   j) an insertion tab (9) of flat construction, which

   - for closure of the packaging container is designed to be inserted into the opening (2b)

   - tapers towards its free end, and

   - which, over the entire length of its other end lying opposite the free end, is joined in the manner of a hinge by way of the second fold line (10b) to the outside flap (7),

   characterised in that

   k) the first and second side of the base (1) have a shorter length than the third and fourth side of the base (1),

   l) the one-walled inside flaps (3a, 3b, 5) are in the form of incision-free trapeziums having equal side edges, the base lines of these trapeziums corresponding incision-free and over their entire length to the fold lines (4b, 4d, 4f) by way of which the inside flaps (3a, 3b, 5) are joined to the portions (12, 12b, 12c),

   m) the first outside flap (5) is of rectangular construction,

   n) the spacing of the fifth pair of fold lines (8a, 8b) is greater than the spacing of the first four pairs of fold lines (4a, 4b), (4c, 4d), (4e, 4f) and (4g, 4h),

   o) the first fold line (10a) is impressed incision-free into the second outside flap (7),

   p) the insertion tab (9) is of incision-free construction and

   q) the width of the insertion tab (9) is greater than the length of the opening (2b) measured in the direction of the incision (2a) and less than the length of the incision (2a).
2. One-piece blank according to claim 1, characterised in that

   a) the first outside flap (6) is extended on one side, without attachments, in the direction of its longitudinal sides, the extension being less than the height, measured in the direction of the longitudinal sides of the outside flap, of a reinforcing strip (14) hinged by way of the fold line (16) to the extended outside flap (6),

   b) respective openings (15a, 15b) are let into the first outside flap (6) and the reinforcing strip (14), which, after folding over the reinforcing strip (14) onto the outside flap (6) along the fold line (16), are positioned in register one above the other and form a suspension opening.
3. One-piece blank according to claim 1 or 2, characterised in that in the second outside flap (7) a semi-circular opening (11) is formed, which intersects the first fold line (10a) not adjoining the insertion tab (9).
4. Moisture-proofed packaging unit, especially for receiving flat articles, such as a stack of paper sheets, characterised in that the packaging unit is formed from a blank for forming a folding packaging container according to claim 1, which is shrink-wrapped in a wrapping of plastics film completely enclosing the packaging unit.
5. Moisture-proofed packaging unit, especially for receiving flat articles, such as a stack of paper sheets, characterised in that the packaging unit is formed from a blank for forming a folding packaging container according to claim 2, which is shrink-wrapped in a wrapping of plastics film completely enclosing the packaging unit
6. Moisture-proofed packaging unit, especially for receiving flat articles, such as a stack of paper sheets, characterised in that the packaging unit is formed from a blank for forming a folding packaging container according to claim 3, which is shrink-wrapped in a wrapping of plastics film completely enclosing the packaging unit
7. Moisture-proofed packaging unit according to one of claims 4 or 6, characterised in that a suspension tab is adhesively secured to the wrapping.