EP2279957A2 - Folding box for deep-frozen food and device for producing the folding box - Google Patents

Abstract

The box has walls (2-5) made of virgin fiber board, and a polyolefin layer provided at an inner side (32), which defines volume for receiving deep-frozen food. A tear-off strip (28) extends into the walls, which include an elongated recess (33) provided at the inner side along the tear-off strip. A reinforcement strip (34) is arranged in the elongated recess, and is connected with the polyolefin layer. A maximum thickness of the reinforcement strip corresponds to a depth of the elongated recess. Independent claims are also included for the following: (1) a layout for producing a folding box (2) a device for producing a foldable sheet material for forming a folding box.

Description

The invention relates to a carton for frozen food and to a device for producing the carton.

Frozen food cartons are used, for example, for fish fingers or vegetables. Because of this purpose food-compatible materials must be used. As a result, primary fiber board (also called "fresh fiber board") is used as starting material, since a secondary fiber board (also called "recycling board") may not be used for reasons of hygiene. The primary fiber board is coated on the inside with polyethylene, so that the material is not soaked with grease or liquid. The layer of polyethylene is extruded onto the cardboard.

Known folding boxes for frozen food can be opened by breaking at least one adhesive bond between a wall and an adjacent wall of the folding box. Also known are cartons for frozen food with a limited by a perforation tear strips that can be opened by separating the tear strip along the perforations. The known cartons are not easy to handle. Reclosing after removal of frozen food is not possible, which complicates the further storage in the carton frozen food. This is particularly disadvantageous for storage packages that are dimensioned for several meals. For example, folding boxes for fish sticks are now sized so that they can take 2x10 to 2x16 fish fingers. In addition, when opening the packaging, cardboard residues may enter the food and affect its quality. This can be done particularly easily by separating the perforation when pulling the tear strip. In addition, when tearing the tear strip unclean, frayed separating edges that affect the appearance of the carton.

Based on this, the present invention seeks to provide a carton for frozen food with more favorable handling properties. Furthermore, an apparatus for producing the carton to be created.

The object is achieved by a folding box with the features of claim 1.

• Wände aus einem Karton aus Primärfasern mit einer Schicht aus einem Polyolefin an der Innenseite, die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
• einen in mindestens einer Wand erstreckten Aufreißstreifen,
• wobei die mindestens eine Wand an der Innenseite im Bereich des Aufreißstreifens eine längliche Vertiefung aufweist, in der ein Verstärkungsstreifen angeordnet ist, der mit der Schicht aus Polyolefin verbunden ist und dessen Stärke maximal etwa der Tiefe der Vertiefung entspricht.

The carton according to the invention for frozen food has

• Walls made of a cardboard of primary fibers with a layer of a polyolefin on the inside, which confine a volume for receiving frozen food,
• a tear strip extending in at least one wall,
• wherein the at least one wall on the inside in the region of the tear strip has an elongated recess in which a reinforcing strip is arranged, which is connected to the layer of polyolefin and whose thickness corresponds approximately to the depth of the depression.

Advantageous embodiments of the carton are given in subclaims.

The tear strip of the carton according to the invention is easy to open due to the reinforcing strip. This results in smooth separation edges and the cardboard does not fray. It is particularly advantageous that the resistant layer of polyolefin by the thus firmly connected Reinforcement strip is separated. The opened carton has an appealing appearance and cardboard remains do not fall into the frozen food. Due to the placement of the reinforcing strip in the elongated recess, the cartons can be laid flat and evenly stacked horizontally in stacks at the frozen food manufacturer for packaging the frozen food without the stacks slipping due to local material buildup or locally increased wall thicknesses. In addition, the frozen food is not compromised when filling in the carton, since the reinforcing thread is hidden in the elongated recess and does not protrude into the volume for receiving the frozen food. The carton thus has excellent storage, transport and cartoning properties.

The polyolefin coated on the paperboard is preferably a polyethylene. The polyolefin may in particular also be a polypropylene. The invention also relates to cartons in which the layer on the inside of the carton consists of a suitable plastic other than a polyolefin. Basically, the invention relates to cartons, which are provided on the inside with a food-compatible and freeze-capable layer of plastic.

It is understood that the reinforcing strip is made of a food-compatible and cryopanelated material. Preferably, the tensile strength of the reinforcing strip exceeds the tensile strength of the polyolefin with which the paperboard is coated on the inside. For example, the reinforcing strip is made of oriented polypropylene. These are stretched and stretched and heat-set polypropylene.

The reinforcing strip may have various cross-sectional shapes. In particular, it may comprise a reinforcing thread, e.g. with a circular cross section, or a reinforcing tape, e.g. with rectangular cross section, be. Preferably, it is a reinforcing tape, which may be particularly well connected to the layer of polyolefin on a flat side.

The reinforcing strip may be bonded to the polyolefin layer in various ways, in particular by sealing, welding or by gluing. Preference is the sticking. Preferably, the reinforcing strip is already provided with an adhesive prior to bonding to the layer of polyolefin, so that it can be connected to the layer by introducing it into the depression.

The above information on the usable materials of the layer on the inside of the carton and the reinforcing strip to the possible cross-sectional shapes of the reinforcing strip and to its connection with the layer of polyolefin also apply to the variants of the invention described below according to claims 3, 4, 7, 10 , 11, 12 and 13.

According to one embodiment, the at least one wall with the recess on the inside on the outside above the depression on no survey. As a result, an imprint on the outside of the wall is not disturbed by a protrusion. In this case, the cardboard preferably has a relatively low weight per unit area (for example 10 to 30 g / m ² , in particular about 13 to 15 g / m ² ) or a relatively small wall thickness (for example 0.25 to 1.5 mm, in particular 0.5 to 1 mm).

Furthermore, the object is achieved by a folding box with the features of claim 3.

• Wände aus einem Karton aus Primärfasern mit einer Schicht aus einem Polyolefin an der Innenseite, die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
• einen in mindestens einer Wand erstreckten Aufreißstreifen,
• wobei die mindestens eine Wand an der Innenseite entlang des Aufreißstreifens mit einem Verstärkungsstreifen verbunden ist und
• die mindestens eine Wand in der Außenseite beidseitig des Aufreißstreifens Ritzlinien aufweist, deren Tiefe so bemessen ist, dass sie in die Schicht aus Polyolefin an der Innenseite nicht eindringen oder diese Schicht nicht durchdringen.

The carton according to the invention for frozen food has

• Walls made of a cardboard of primary fibers with a layer of a polyolefin on the inside, which confine a volume for receiving frozen food,
• a tear strip extending in at least one wall,
• wherein the at least one wall on the inside along the tear strip is connected to a reinforcing strip and
• the at least one wall in the outer side on both sides of the tear strip has scribe lines whose depth is such that they do not penetrate into the layer of polyolefin on the inside or do not penetrate this layer.

Advantageous embodiments of the carton are given in subclaims. The carton according to claim 3 may advantageously have the features of at least one of the preceding claims.

The tear strip of the carton according to the invention is easy to open due to the reinforcing strip. This results in smooth separation edges and the cardboard does not fray. It is particularly advantageous that the resistant layer of polyolefin is separated by the thus firmly connected reinforcing strip. The opened carton has an appealing appearance and cardboard remains do not fall into the frozen food. The scribe lines facilitate the tearing of the package, but do not affect their tightness. You can especially in the field of deposit or the Base of a multilayer carton end. Preferably, the scribe lines penetrate the entire carton or at least a substantial portion thereof. The scribe lines favor severing the tear strip without fraying the carton. The scribe lines may be aligned with, or in between or outside, the flanks of the recess.

Furthermore, the object is achieved by a folding box with the features of claim 4.

• Wände aus einem Karton aus Primärfasern mit einer Schicht aus einem Polyolefin an der Innenseite, die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
• einen in mindestens einer Wand erstreckten Aufreißstreifen,
• wobei die mindestens eine Wand an der Innenseite entlang des Aufreißstreifens mit einem Verstärkungsstreifen verbunden ist,
• mindestens eine Wand am längsseitigen Rand und/oder am querseitigen Rand eine Klebelasche aufweist, die mit der Innenseite der benachbarten Wand verklebt ist, und
• die benachbarte Wand im Bereich ihrer Überlappung mit der Klebelasche ein Laschenende des Aufreißstreifens aufweist, das über den Rand der Wand hinaussteht, der die Klebelasche aufweist.

The carton according to the invention for frozen food has

• Walls made of a cardboard of primary fibers with a layer of a polyolefin on the inside, which confine a volume for receiving frozen food,
• a tear strip extending in at least one wall,
• wherein the at least one wall on the inside along the tear strip is connected to a reinforcing strip,
• at least one wall on the longitudinal edge and / or on the transverse edge has an adhesive tab which is glued to the inside of the adjacent wall, and
• the adjacent wall, in the region of its overlap with the glue flap, has a tab end of the tear strip which projects beyond the edge of the wall having the glue flap.

Advantageous embodiments of the carton are given in subclaims. The folding box according to the invention may advantageously also have the features of at least one of the preceding claims.

The tear strip of the carton according to the invention is easy to open due to the reinforcing strip. This results in smooth separation edges and the cardboard does not fray. It is particularly advantageous that the resistant layer of polyolefin is separated by the thus firmly connected reinforcing strip. The overhanging tab end facilitates initial grasping and pulling out of the tear strip. This purpose is also served by a further embodiment according to which the wall with the adhesive flap has a deep embossing on the edge below the tab end projecting beyond this edge. The user can dip something in the embossing and grip the tab end better. According to a further embodiment, which supports the gripping of the tab end, this is trapezoidal, widening outwards. Finally, the extraction of the tab end and initial tearing of the tear strip is assisted by the fact that the tab end is bounded by scribe lines which penetrate or penetrate the layer of polyethylene. This embodiment, the scribe lines in the region of the tab end is more pronounced than in the other areas, so that it is easier possible to pull out the tab end. Preferably, the area in which the tab end is delimited by the deeper scribed lines does not extend beyond the region of overlap of the glue flap in the wall. Otherwise, leaking of the packaging in the region of the flap end may occur.

Furthermore, the object is achieved by a carton having the features of claim 7.

• Wände aus einem Karton aus Primärfasern mit einer Schicht aus einem Polyolefin an der Innenseite, die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
• einen in mindestens einer Wand erstreckten Aufreißstreifen,
• die Wände an längsseitigen Rändern aneinandergelenkte und zu einer Röhre geschlossene Wände und an querseitigen Rändern der vorgenannten Wände angelenkte weitere Wände, die die endseitigen Öffnungen der Röhre schließen, umfassen und
• wobei der Aufreißstreifen vollständig über die Wände umläuft, die an längsseitigen Rändern aneinander gelenkt sind, oder vollständig über die Wände umläuft, die an querseitigen Rändern aneinander gelenkt sind, so dass die Faltschachtel durch Heraustrennen des Aufreißstreifens in zwei Teile trennbar ist.

The carton according to the invention for frozen food has

• Walls made of a cardboard of primary fibers with a layer of a polyolefin on the inside, which confine a volume for receiving frozen food,
• a tear strip extending in at least one wall,
• the walls at longitudinal edges abutted and closed to a tube walls and hinged to lateral edges of the aforementioned walls further walls which close the end openings of the tube include, and
• the tear strip completely circulating over the walls which are hinged together at longitudinal edges or completely circulating over the walls which are hinged to one another at transverse edges, so that the folding box is separable by separating the tear strip into two parts.

Advantageous embodiments of the carton are given in subclaims. According to one embodiment, the at least one wall is connected on the inside along the tear strip with a reinforcing strip. The carton may advantageously also have the features of at least one of the preceding claims.

The tear strip of the carton according to the invention is easy to open. It is particularly easy to open the carton when the tear strip on the inside is connected to a reinforcing strip. This results in smooth separation edges and the cardboard does not fray. It is particularly advantageous that the resistant layer of polyolefin is separated by the thus firmly connected reinforcing strip. The opened carton has an appealing appearance and cardboard remains do not fall into the frozen food. After separating the carton into two parts, the larger part than Container for remaining frozen food and the smaller part can be used as a cap, which serves to reclosure of the larger part. For this purpose, the cap can be slipped on the larger part. The tear strip may circulate at various levels with respect to the transverse edges on the walls. In particular, he may have an at least partially inclined, curved or stepped course with respect to the edges. Preferably, the tear strip is parallel to the longitudinal edges or the transverse edges of the walls.

According to an embodiment which facilitates reclosing the carton, at least two opposing walls each have a fold line in the middle, which run parallel to the longitudinal edges, if the tear strip rotates over the walls, which are hinged against each other at longitudinal edges run parallel to the transverse edges, if the tear strip rotates over walls which are hinged together at transverse edges. The fold lines allow the carton to be slightly compressed at the open end, so that the severed cap is easier to put on. The fold lines are preferably score lines.

According to a preferred embodiment, the ratio of the lengths of the carton on both sides of the tear strip is about 2: 1 to 5: 1. Due to these aspect ratios, the carton may be divided by separating the tear strip into a container for remaining frozen food and a cap to reseal the container.

Furthermore, the object is achieved by a folding box with the features of claim 10.

• Wände aus einem Karton aus Primärfasern mit einer Schicht aus einem Polyolefin an der Innenseite, die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
• einen in mindestens einer Wand erstreckten Aufreißstreifen,
• wobei die mindestens eine Wand an der Innenseite entlang des Aufreißstreifens mit einem Verstärkungsstreifen verbunden ist und
• der Aufreißstreifen von einem Ende einer weiteren Faltlinie in einer Wand ausgehend über mindestens eine Wand verläuft und am anderen Ende der weiteren Faltlinie endet, so dass nach Heraustrennen des Aufreißstreifens eine Klappe gebildet wird, die um die weitere Faltlinie klappbar ist.

The carton according to the invention for frozen food has

• Walls made of a cardboard of primary fibers with a layer of a polyolefin on the inside, which confine a volume for receiving frozen food,
• a tear strip extending in at least one wall,
• wherein the at least one wall on the inside along the tear strip is connected to a reinforcing strip and
• the tear strip extending from one end of another fold line in a wall over at least one wall and ends at the other end of the further fold line, so that after removal of the tear strip a flap is formed, which is foldable about the further fold line.

Advantageous embodiments of the carton are given in subclaims. The folding box according to the invention may advantageously also have the features of at least one of the preceding claims.

The tear strip of the carton according to the invention is easy to open due to the reinforcing strip. This results in smooth separation edges and the cardboard does not fray. It is particularly advantageous that the resistant layer of polyolefin is separated by the thus firmly connected reinforcing strip. The opened carton has an appealing appearance and cardboard remains do not fall into the frozen food. In this carton, the tear strip bounds a flap which can be opened after removal of the tear strip by flaps around the fold line. The further fold line is defined in particular by an imaginary straight line between the two ends of the tear strip, wherein the flap can be folded around this imaginary straight line. Preferably, the further fold line is a crease line or another prepared fold line around which the flap can be unfolded. Furthermore, the object is achieved by a folding box with the features of claim 11.

• Wände aus einem Karton aus Primärfasern mit einer Schicht aus einem Polyolefin an der Innenseite, die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
• einen in mindestens einer Wand erstreckten Aufreißstreifen,
• wobei die mindestens eine Wand an der Innenseite entlang des Aufreißstreifens mit einem Verstärkungsstreifen verbunden ist und
• der Aufreißstreifen in mindestens einer Wand eine zusammenhängende Fläche vollständig umgrenzt, so dass nach Heraustrennen des Aufreißstreifens der von diesem umgrenzte Teil der mindestens einen Wand aus dieser herausnehmbar ist.

The carton according to the invention for frozen food has

• Walls made of a cardboard of primary fibers with a layer of a polyolefin on the inside, which confine a volume for receiving frozen food,
• a tear strip extending in at least one wall,
• wherein the at least one wall on the inside along the tear strip is connected to a reinforcing strip and
• the tear strip completely delimits a coherent surface in at least one wall so that, after the tear strip has been severed, the part of the at least one wall delimited by the tear strip can be removed therefrom.

Advantageous embodiments of the carton are given in subclaims. The folding box according to the invention may advantageously also have the features of at least one of the preceding claims.

The tear strip of the carton according to the invention is easy to open due to the reinforcing strip. This results in smooth separation edges and the cardboard does not fray. It is particularly advantageous that the resistant layer of polyolefin is separated by the thus firmly connected reinforcing strip. The opened carton has an appealing appearance and cardboard remains do not fall into the frozen food. In this embodiment, the tear strip allows a part detach at least one wall to engage through the opening thus created in the interior of the carton.

• Bevorzugt kommt ein mehrlagiger Karton zum Einsatz. Dieser kann an der Außenseite eine gestrichene Decke, darunter eine Einlage und darunter eine Unterlage aufweisen. An der Innenseite befindet sich die Schicht aus Polyethylen oder einem anderen Polyolefin. Die Kartonlagen bestehen aus Primärkarton bzw. Frischfaserkarton. Bevorzugt ist der Karton ein Chromo-Karton (GC). Hierbei handelt es sich um einen mehrlagigen Karton mit einer holzfreien weißen, meist mehrfach gestrichenen Decke, einer hellen Einlage und einer hellen oder weißen Unterlage. Die Decke ist gut bedruckbar. Die Unterlage ist mit der Schicht aus einem Polyolefin kaschiert.

The following embodiments apply to all variants of the invention:

• Preferably, a multilayer cardboard is used. This may have on the outside a painted ceiling, including an insert and underneath a pad. On the inside is the layer of polyethylene or another polyolefin. The cardboard layers consist of primary cardboard or virgin fiber cardboard. The cardboard is preferably a chromo cardboard (GC). This is a multi-layered box with a wood-free white, mostly multi-coated ceiling, a light inlay and a light or white base. The blanket is easy to print. The backing is laminated with the layer of a polyolefin.

According to a preferred embodiment, at least one wall has an imprint and / or a coloring on the outside.

The carton can have different geometries. Preferably, it is cuboid. But it can also be circular cylindrical or prismatic, etc.

According to one embodiment, the folding box at the longitudinal edges directed to each other and closed to a tube walls and hinged to lateral edges of the aforementioned walls further walls that close the end openings of the tube. In this way, in particular a cuboid carton can be realized.

According to a further embodiment, at least one wall on the longitudinal edge and / or at least one wall on the transverse edge has an adhesive tab which is glued to the inside of the adjacent wall. This allows the production of the carton of one-piece blanks. By gluing the tube and the end-side openings of the tube are closed.

Furthermore, the invention relates to blanks for producing a carton according to one of the preceding claims.

A blank according to the invention comprises at least one wall of a cardboard of primary fibers with a layer of a polyolefin on the inside and a tear strip extending in the at least one wall, the at least one wall along the tear strip having on the inside an elongated recess in which a reinforcing strip is arranged, which is connected to the layer of polyolefin and whose thickness corresponds approximately to the depth of the depression.

Another blank according to the invention comprises at least one wall of a cardboard of primary fibers having a layer of a polyolefin on the inside and a tear strip extending in the at least one wall, the at least one wall along the tear strip having a reinforcing strip which is integral with the layer Polyolefin is connected and the at least one wall in the outer side on both sides of the tear strip has scribe lines whose depth is such that they do not penetrate into the layer of polyolefin on the inside or not penetrate this layer.

Another blank according to the invention has at least one wall of a cardboard of primary fibers with a layer of a polyolefin on the inside and a tear strip extending in the at least one wall, the at least one wall along the tear strip having a reinforcing strip connected to the layer of polyolefin, at least one wall at the longitudinal edge and / or at the transverse edge an adhesive flap having with the inside of another wall is glued and the further wall in the region in which it can be brought in overlapping arrangement with the adhesive flap to be glued to the adhesive tab, a tab end of the tear strip which protrudes slightly beyond the edge of this wall.

A further blank according to the invention comprises walls of a cardboard of primary fibers with a layer of a polyolefin on the inside and a tear strip extending in at least one wall, the walls being hinged together at longitudinal edges and closeable into a tube and at transverse edges of the aforementioned Walls hinged further walls include, with which the end-side openings of the tube are closable, the tear strip extends completely over the walls, which are guided at longitudinal edges together, or completely across the walls, which are directed at transverse edges together, so that the blank is separable by separating the tear strip in two parts. According to an advantageous embodiment, the at least one wall is connected on the inside along the tear strip with a reinforcing strip.

Another blank according to the invention comprises walls of a cardboard of primary fibers with a layer of a polyolefin on the inside and a tear strip extending in at least one wall, the at least one wall on the inside along the tear strip being connected to a reinforcing strip and the tear strip of one end of another fold line extending in a wall over at least one wall and at the other end in the further fold line ends, so that after removal of the tear strip, a flap is formed which can be folded around the further fold line.

A further blank according to the invention comprises walls of a cardboard of primary fibers having a layer of a polyolefin on the inside and a tear strip extending in at least one wall, the at least one wall on the inside along the tear strip being connected to a reinforcing strip and the tear strip in at least one wall completely bounds a contiguous surface, so that after separation of the tear strip of the bounded by this part of the at least one wall is removable therefrom.

Preferably, the blank is a one-piece blank, in which the walls are hinged to each other via fold lines. The fold lines are preferably score lines. According to embodiments, the blank has at least one further feature of a part of the above-explained folding box.

Furthermore, the object is achieved by a device having the features of claim 13.

• ein Nutrad zum Einbringen einer länglichen Vertiefung in ein Bahnmaterial aus Karton mit einer Schicht aus Polyethylen oder einem anderen Polyolefin an der Innenseite,
• eine das Nutrad drehbar lagernde Zustelleinrichtung, mit der das Nutrad mit einer einstellbaren Andruckkraft gegen die Innenseite des Bahnmaterials pressbar ist,
• eine drehbar gelagerte Gegenwalze, deren Achse parallel zur Achse des Nutrades angeordnet ist, gegen deren Umfang das Nutrad pressbar ist,
• eine Einrichtung zum Zuführen des Bahnmaterials zwischen Nutrad und Gegenwalze,
• einen Sensor zum Ermitteln der Tiefe der mittels des Nutrades in die Innenseite des Bahnmaterials eingeprägten Vertiefung, der in Durchlaufrichtung des Bahnmaterials hinter dem Nutrad angeordnet ist,
• einer mit dem Sensor und der Zustelleinrichtung verbundenen Regeleinrichtung, die die Andruckkraft des Nutrades in Abhängigkeit von der mittels des Sensors ermittelten Tiefe der Vertiefung steuert, und
• eine Einrichtung zum Zuführen eines Verstärkungsstreifens in die längliche Vertiefung des Bahnmaterials und eines Klebemittels zwischen Verstärkungsstreifen und Vertiefung.

An inventive device for producing foldable sheet material for forming a carton for frozen food with a tear strip of the kind discussed above

• a groove wheel for introducing an elongated recess into a sheet material made of cardboard with a layer of polyethylene or another polyolefin on the inside,
• a feed device which rotatably supports the groove wheel and with which the groove wheel can be pressed against the inside of the web material with an adjustable pressure force,
• a rotatably mounted counter-roller, the axis of which is arranged parallel to the axis of the grooved wheel against whose circumference the grooved wheel can be pressed,
• a device for feeding the web material between the groove wheel and counter-roller,
• a sensor for determining the depth of the recess impressed into the inside of the web material by means of the groove wheel, which recess is arranged behind the groove wheel in the direction of passage of the web material,
• a control device connected to the sensor and the feed device, which controls the pressing force of the grooved wheel as a function of the depth of the depression determined by means of the sensor, and
• means for feeding a reinforcing strip into the elongated recess of the web material and an adhesive between reinforcing strip and recess.

In the apparatus according to the invention, the backing roll forms a substrate which, when the elongate depression is pressed in by means of the grooved wheel into the inside of the web material, prevents an elevation from forming on the outside of the web material. Further, the regulation of the depth of the elongated recess ensures that it is inserted as deeply into the sheet material as is necessary in view of placing the reinforcement strip in the recess without protruding beyond the level of the inside of the sheet material adjacent to the recess , When introducing the depression into the web material, it may be considered that virgin fiber cardboard has a "memory" effect which causes the depth of the depression to decrease somewhat in a period of time after its manufacture. Compensation is the depression targeted slightly deeper pressed than required to accommodate the reinforcing strip completely in it. In this case, the initial depth of the incorporated in the web material recess depends on the machine speed and the material used. The initial depth is preferably selected so that after the resetting operations the recess is at least so deep that the reinforcing strip does not protrude beyond the inside of the web material adjacent to the recess and there are no protrusions on the outside of the web material.

According to a further embodiment, the means for feeding the web material and / or the means for supplying the reinforcing strip comprises a supply roll of the web material and / or a supply roll for the reinforcing strip and a roller bearing associated with the respective supply roll for rotatably supporting the supply roll. In principle, it is also possible to supply the web material and / or the reinforcing strip in the form of flat strips, which can be removed from a stack.

According to one embodiment, the means for feeding the reinforcing strip introduces the web material on the circumference of the backing roll into the depression. Here, the counter roll can be used as a substrate for pressing the reinforcing strip. Preferably, the means for supplying the reinforcing strip under pretension to the web material on the periphery of the counter roll.

The adhesive may be introduced separately from the means for supplying the reinforcing strip and adhesive between reinforcing strips and adhesive. Preferably, the reinforcing strip is provided from the outset with an adhesive, so that the means for supplying the Reinforcement strip and the adhesive when inserting the reinforcing strip in the elongated recess at the same time applied the adhesive between reinforcing strip and depression.

According to one embodiment, means for feeding and means for guiding the web material are aligned with the backing roll such that the backing material at least partially wraps around the backing roll and the means for feeding the reinforcing strip introduces the reinforcing thread in the wrap region of the opposite side into the elongate depression of the web material / or the sensor detects the depth of the depression in the wrap area. The wrap area of the counter roll forms a base for the gluing of the reinforcing strip and for the measurement of the depth. The wrap is for example 180 °. This promotes advantageous arrangement of the means for feeding and the means for carrying away the web material on the same side of the backing roll.

According to one embodiment, the groove wheel has rounded flanks. The rounded flanks ensure that the depression is gently introduced into the web material and contribute to the avoidance of elevations on the outside of the web material.

• eine längliche Vertiefung in die Innenseite eines Bahnmaterials aus Karton mit einer Schicht aus einem Polyolefin an der Innenseite unter Anwendung eines entsprechenden Gegendruckes auf die Außenseite des Bahnmaterials eingepresst wird,
• die Tiefe der eingepressten Vertiefung fortlaufend und/oder wiederholt ermittelt wird,
• die Tiefe der Vertiefung durch Einstellen der Kraft zum Einpressen der Vertiefung auf einen vorgegebenen Wert nachgeregelt wird und
• ein Verstärkungsstreifen in die längliche Vertiefung eingebracht und mit der Schicht aus Polyolefin verbunden wird.

Finally, the invention relates to a method for producing foldable flat material for forming a folded box for frozen food with a tear strip according to one of the above claims, wherein

• an elongated recess in the inside of a cardboard sheet material with a layer of a polyolefin on the inside using a corresponding counter-pressure is pressed onto the outside of the web material,
• the depth of the indented depression is determined continuously and / or repeatedly,
• the depth of the recess is adjusted by adjusting the force for pressing the recess to a predetermined value, and
• a reinforcing strip is inserted into the elongated recess and bonded to the layer of polyolefin.

According to one embodiment of the method, the depth of the recess is adjusted to a predetermined value, which ensures that when a decrease in the depth of the recess due to a restoring effect of the reinforcement strip disposed within the elongated recess does not exceed the level of the inside of the sheet material next to the recess and the outside of the web over the depression is free of elevations.

1. 1. Faltschachtel für Tiefkühlkost mit
   • Wänden (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32), die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
   • einem in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28),
   • wobei die mindestens eine Wand (2 bis 5)an der Innenseite (32) entlang des Aufreißstreifens (28) eine längliche Vertiefung (33) aufweist, in der ein Verstärkungsstreifen (34) angeordnet ist, der mit der Schicht (38) aus Polyolefin verbunden ist und dessen Stärke maximal etwa der Tiefe der Vertiefung (33) entspricht.
2. 2. Faltschachtel nach Ziffer 1, bei dem die mindestens einer Wand (2 bis 5) mit der Vertiefung (33) an der Innenseite (32) an der Außenseite (31) oberhalb der Vertiefung (33) keine Erhebung aufweist.
3. 3. Faltschachtel für Tiefkühlkost mit
   • Wänden (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32), die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
   • einem in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28),
   • wobei die mindestens eine Wand (2 bis 5) an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist und
   • wobei die mindestens eine Wand (2 bis 5) in der Außenseite (31) beidseitig des Aufreißstreifens (28) Ritzlinien (29, 30) aufweist, deren Tiefe so bemessen ist, dass sie in die Schicht (38) aus Polyolefin an der Innenseite (32) nicht eindringen oder diese Schicht (38) nicht durchdringen.
4. 4. Faltschachtel nach Ziffer 3 und mindestens einer der Ziffern 1 oder 2.
5. 5. Faltschachtel für Tiefkühlkost mit
   • Wänden (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32), die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
   • einem in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28),
   • wobei die mindestens eine Wand (2 bis 5) an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist,
   • mindestens eine Wand (2) am längsseitigen Rand und/oder am querseitigen Rand eine Klebelasche (20) aufweist, die mit der Innenseite der benachbarten Wand (5) verklebt ist, und
   • die benachbarte Wand (5) im Bereich ihrer Überlappung mit der Klebelasche (10) ein Laschenende (36) des Aufreißstreifens (28) aufweist, das etwas über den Rand der Wand (2) hinaussteht, der die Klebelasche (10) aufweist.
6. 6. Faltschachtel nach Ziffer 5 und einer der Ziffern 1 bis 4.
7. 7. Faltschachtel nach Ziffer 5 oder 6, bei der die Wand mit der Klebelasche (10) am Rand unterhalb des über diesen Rand hinausstehenden Laschenendes (36) eine Tiefprägung (37) aufweist.
8. 8. Faltschachtel nach einer der Ziffern 5 bis 7, bei der das Laschenende (36) trapezförmig ist.
9. 9. Faltschachtel nach einer der Ziffern 5 bis 8, bei der das Laschenende (36) durch Ritzlinien (29, 30) begrenzt ist, die in die Schicht (38) aus Polyethylen eindringen oder diese durchdringen.
10. 10. Faltschachtel für Tiefkühlkost mit
    • Wänden (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32), die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen,
    • einem in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28),
    • wobei die Wände an längsseitigen Rändern aneinander gelenkte und zu einer Röhre geschlossene Wände (2 bis 5) und an querseitigen Rändern der vorgenannten Wände angelenkte weitere Wände (11, 12), die die endseitigen Öffnungen der Röhre schließen, umfassen und
    • wobei der Aufreißstreifen (28) vollständig über die Wände (2 bis 5) umläuft, die an längsseitigen Rändern aneinander gelenkt sind, oder vollständig über die Wände umläuft, die an querseitigen Rändern aneinander gelenkt sind, so dass die Faltschachtel durch Heraustrennen des Aufreißstreifens (28) in zwei Teile (42, 43) trennbar ist.
11. 11. Faltschachtel nach Ziffern 10, bei der die mindestens eine Wand (2, 5) an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist,
12. 12. Faltschachtel nach Ziffer 10 oder 11 und einer der Ziffern 1 bis 9.
13. 13. Faltschachtel nach einer der Ziffern 10 bis 12, bei der der Aufreißstreifen (28) parallel zu den längsseitigen Rändern oder den querseitigen Rändern der Wände (2 bis 5) verläuft.
14. 14. Faltschachtel nach einer der Ziffern 10 bis 13, bei der mindestens zwei einander gegenüberliegende Wände (2 bis 5) jeweils in der Mitte eine Faltlinie (39, 40) aufweisen, die parallel zu den längsseitigen Rändern verlaufen, falls der Aufreißstreifen (28) über die Wände umläuft, die an längsseitigen Rändern aneinandergelenkt sind, und die parallel zu den querseitigen Rändern verlaufen, falls der Aufreißstreifen über Wände umläuft, die an querseitigen Rändern aneinandergelenkt sind.
15. 15. Faltschachtel nach einer der Ziffern 10 bis 14, bei der das Verhältnis der Längen der Faltschachtel auf beiden Seiten des Aufreißstreifens (28) etwa 2:1 bis 5:1 beträgt.
16. 16. Faltschachtel für Tiefkühlkost mit
    • Wänden (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32), die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen, und
    • einem in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28),
    • wobei die mindestens eine Wand (2 bis 5) an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist und
    • der Aufreißstreifen von einem Ende einer weiteren Faltlinie in einer Wand (2 bis 5) ausgehend über mindestens eine Wand verläuft und am anderen Ende der weiteren Faltlinie endet, so dass nach Heraustrennen des Aufreißstreifens (28) eine Klappe gebildet wird, die um die weitere Faltlinie klappbar ist.
17. 17. Faltschachtel nach Ziffer 16 und einer der Ziffern 1 bis 15.
18. 18. Faltschachtel für Tiefkühlkost mit
    • Wänden (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32), die ein Volumen zur Aufnahme von Tiefkühlkost begrenzen, und
    • einem in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28),
    • wobei die mindestens eine Wand (2 bis 5) an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist und
    • der Aufreißstreifen (28) in mindestens einer Wand eine zusammenhängende Fläche vollständig umgrenzt, so dass nach Heraustrennen des Aufreißstreifens (28) der von diesem umgrenzte Teil der mindestens einen Wand aus dieser herausnehmbar ist.
19. 19. Faltschachtel nach Ziffer 10 und einer der Ziffern 1 bis 17.
20. 20. Faltschachtel nach einer der Ziffern 1 bis 19, bei der der Karton ein Chromo-Karton (GC) ist.
21. 21. Faltschachtel nach einer der Ziffern 1 bis 20, bei der mindestens eine Wand (2 bis 5) an der Außenseite einen Aufdruck und/oder Einfärbung aufweist.
22. 22. Faltschachtel nach einer der Ziffern 1 bis 21, bei der der Verstärkungsstreifen (28) mit der Schicht (38) aus Polyethylen verklebt ist.
23. 23. Zuschnitt zum Herstellen einer Faltschachtel gemäß einer der Ziffern 1 bis 22 mit mindestens einer Wand (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite und einem in der mindestens einen Wand (2 bis 5) erstreckten Aufreißstreifen (28), wobei die mindestens eine Wand (2 bis 5) entlang des Aufreißstreifens (28) an der Innenseite eine längliche Vertiefung (33) aufweist, in der ein Verstärkungsstreifen (34) angeordnet ist, der mit der Schicht (38) aus Polyolefin verbunden ist und dessen Stärke maximal etwa der Tiefe der Vertiefung (33) entspricht.
24. 24. Zuschnitt zum Herstellen einer Faltschachtel gemäß einer der Ziffern 1 bis 22 mit mindestens einer Wand (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32) und einen in der mindestens einen Wand (2 bis 5) erstreckten Aufreißstreifen (28), wobei die mindestens eine Wand (2 bis 5) entlang des Aufreißstreifens (28) einen Verstärkungsstreifen (34) aufweist, der mit der Schicht (38) aus Polyolefin verbunden ist und die mindestens eine Wand (2 bis 5) in der Außenseite beidseitig des Aufreißstreifens Ritzlinien (29, 30) aufweist, deren Tiefe so bemessen ist, dass sie in die Schicht (38) aus Polyolefin an der Innenseite (32) nicht eindringen oder diese Schicht (38) nicht durchdringen.
25. 25. Zuschnitt nach Ziffer 24 und Ziffer 23.
26. 26. Zuschnitt zum Herstellen einer Faltschachtel gemäß einer der Ziffern 1 bis 22 mit mindestens einer Wand (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32) und einem in der mindestens einen Wand erstreckten Aufreißstreifen (28), wobei die mindestens eine Wand (2 bis 5) entlang des Aufreißstreifens (28) einen Verstärkungsstreifen (34) aufweist, der mit der Schicht (38) aus Polyolefin verbunden ist, mindestens eine Wand am längsseitigen Rand und/oder am querseitigen Rand eine Klebelasche (10) aufweist, die mit der Innenseite einer weiteren Wand (5) verklebbar ist und die weitere Wand (5) in dem Bereich, in dem sie in überlappende Anordnung mit der Klebelasche (10) bringbar ist, um mit der Klebelasche verklebt zu werden, ein Laschenende (36) des Aufreißstreifens (28) aufweist, das etwas über den Rand (35) dieser Wand (5) hinaussteht.
27. 27. Zuschnitt nach Ziffer 26 und einer der Ziffern 23 bis 25.
28. 28. Zuschnitt zum Herstellen einer Faltschachtel gemäß einer der Ziffern 1 bis 22 mit mindestens einer Wand (2 bis 5, 11, 12) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32) und einem in mindestens einer Wand erstreckten Aufreißstreifen (28), wobei die Wände (2 bis 5) an längsseitigen Rändern aneinander gelenkte und zu einer Röhre schließbare Wände und an querseitigen Rändern der vorgenannten Wände angelenkte weitere Wände (11, 12) umfassen, mit denen die endseitigen Öffnungen der Röhre schließbar sind, der Aufreißstreifen vollständig über die Wände (2 bis 5) hinweg verläuft, die an längsseitigen Rändern aneinander gelenkt sind, oder vollständig über die Wände (2, 4, 11, 12) hinweg verläuft, die an querseitigen Rändern aneinander gelenkt sind, so dass der Zuschnitt durch Heraustrennen des Aufreißstreifens (28) in zwei Teile trennbar ist.
29. 29. Zuschnitt nach Ziffer 28 und einer der Ziffern 23 bis 27.
30. 30. Zuschnitt nach Ziffer 28 oder 29, bei dem die mindestens eine Wand (2 bis 5, 11, 12) an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist.
31. 31. Zuschnitt zum Herstellen einer Faltschachtel gemäß einer der Ziffern 1 bis 22 mit mindestens einer Wand (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32) und einen in mindestens einer Wand (2 bis 5) erstreckten Aufreißstreifen (28), wobei die mindestens eine Wand an der Innenseite (32) entlang des Aufreißstreifens (28) mit einem Verstärkungsstreifen (34) verbunden ist und der Aufreißstreifen (28) von einem Ende einer weiteren Faltlinie in einer Wand ausgehend über mindestens eine Wand verläuft und am anderen Ende in der weiteren Faltlinie endet, so dass nach Heraustrennen des Aufreißstreifens (28) eine Klappe gebildet wird, die um die weitere Faltlinie klappbar ist.
32. 32. Zuschnitt nach Ziffer 31 und einer der Ziffern 23 bis 30.
33. 33. Zuschnitt zum Herstellen einer Faltschachtel gemäß einer der Ziffern 1 bis 22 mit mindestens einer Wand (2 bis 5) aus einem Karton aus Primärfasern mit einer Schicht (38) aus einem Polyolefin an der Innenseite (32) und einem in mindestens einer Wand erstreckten Aufreißstreifen (28), wobei die mindestens eine Wand (2 bis 5) an der Innenseite (32) entlang des Aufreißstreifens mit einem Verstärkungsstreifen (34) verbunden ist und der Aufreißstreifen (28) in mindestens einer Wand (2 bis 5) eine zusammenhängende Fläche vollständig umgrent, so dass nach Heraustrennen des Aufreißstreifens (28) der von diesem umgrenzte Teil der mindestens einen Wand aus dieser herausnehmbar ist.
34. 34. Zuschnitt nach Ziffer 33 und einer der Ziffern 23 bis 32.
35. 35. Zuschnitt gemäß einer der Ziffern 23 bis 34 mit mindestens einem weiteren Merkmal eines Teils der Faltschachtel gemäß einer der Ziffern 1 bis 22.
36. 36. Vorrichtung zum Herstellen von faltbarem Flachmaterial zur Bildung einer Faltschachtel für Tiefkühlkost mit einem Aufreißstreifen oder eines Zuschnittes zum Herstellen einer solchen Faltschachtel gemäß einer der Ziffern 1 bis 35 mit
    • einem Nutrad (46) zum Einbringen einer länglichen Vertiefung (33) in ein Bahnmaterial (49) aus Karton mit einer Schicht (38) aus einem Polyolefin an der Innenseite,
    • einer das Nutrad drehbar lagernden Zustelleinrichtung (47), mit der das Nutrad (46) mit einer einstellbaren Andruckkraft gegen die Innenseite des Bahnmaterials (49) pressbar ist,
    • einer drehbar gelagerten Gegenwalze (48), deren Achse parallel zur Achse des Nutrades (46) angeordnet ist, gegen deren Umfang das Nutrad (46) pressbar ist,
    • einer Einrichtung zum Zuführen des Bahnmaterials (49) zwischen Nutrad (46) und Gegenwalze (48),
    • einem Sensor (54) zum Ermitteln der Tiefe der mittels des Nutrades (46) in die Innenseite des Bahnmaterials (49) eingeprägten Vertiefung (33), der in Durchlaufrichtung des Bahnmaterials (49) hinter dem Nutrad (46) angeordnet ist,
    • einer mit dem Sensor (54) und der Zustelleinrichtung verbundenen Regeleinrichtung (55), die die Andruckkraft des Nutrades (46) in Abhängigkeit von der mittels des Sensors (54) ermittelten Tiefe der Vertiefung (33) steuert, und
    • einer Einrichtung zum Zuführen (50) eines Verstärkungsstreifens (34) in die längliche Vertiefung (33) des Bahnmaterials (49) und eines Klebemittels zwischen Verstärkungsstreifen (34) und Vertiefung (33).
37. 37. Vorrichtung nach Ziffer 36, bei der die Einrichtung (50) zum Zuführen des Bahnmaterials (50) und/oder die Einrichtung zum Zuführen des Verstärkungsstreifens (34) eine Vorratsrolle für das Bahnmaterial und/oder eine Vorratsrolle (51) für den Verstärkungsstreifen (34) und ein der jeweiligen Vorratsrolle zugeordnetes Rollenlager zum drehbaren Lagern der Vorratsrolle aufweist.
38. 38. Vorrichtung nach Ziffer 36 oder 37, bei der die Einrichtung zum Zuführen (50) des Verstärkungsstreifens (34) das Bahnmaterial (49) auf den Umfang der Gegenwalze (48) in die Vertiefung (33) einführt.
39. 39. Vorrichtung nach einer der Ziffern 36 bis 38, bei der die Einrichtung zum Zuführen und eine Einrichtung zum Wegführen des Bahnmaterials so auf die Gegenwalze (48) ausgerichtet sind, dass das Bahnmaterial (49) die Gegenwalze (48) zumindest teilweise umschlingt und die Einrichtung zum Zuführen (50) des Verstärkungsstreifens (34) den Verstärkungsstreifen im Umschlingungsbereich der Gegenwalze (48) in die längliche Vertiefung (33) des Bahnmaterials (49) einführt und/oder der Sensor (54) die Tiefe der Vertiefung im Umschlingungsbereich erfasst.
40. 40. Vorrichtung nach einer der Ziffern 36 bis 39, bei der das Nutrad (46) gerundete Flanken aufweist.

Below are summarized various variants of the invention and embodiment thereof:

1. 1. Carton for frozen food with
   • Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) defining a volume for receiving frozen food,
   • a tear strip (28) extending in at least one wall (2 to 5),
   • wherein the at least one wall (2 to 5) on the inner side (32) along the tear strip (28) has an elongated recess (33) in which a reinforcing strip (34) is arranged which is integral with the layer (38) Polyolefin is connected and whose thickness corresponds approximately to the depth of the recess (33).
2. 2. Folding box according to item 1, wherein the at least one wall (2 to 5) with the recess (33) on the inside (32) on the outside (31) above the recess (33) has no survey.
3. 3. Folding box for frozen food with
   • Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) defining a volume for receiving frozen food,
   • a tear strip (28) extending in at least one wall (2 to 5),
   • wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34) and
   • wherein the at least one wall (2 to 5) in the outer side (31) on both sides of the tear strip (28) scribing lines (29, 30) whose depth is dimensioned so that in the layer (38) of polyolefin on the inside ( 32) do not penetrate or penetrate this layer (38).
4. 4. Folding box according to item 3 and at least one of the numbers 1 or 2.
5. 5. Carton for frozen food with
   • Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) defining a volume for receiving frozen food,
   • a tear strip (28) extending in at least one wall (2 to 5),
   • wherein the at least one wall (2 to 5) on the inner side (32) along the tear strip (28) is connected to a reinforcing strip (34),
   • at least one wall (2) on the longitudinal edge and / or on the transverse edge has an adhesive tab (20) which is glued to the inside of the adjacent wall (5), and
   • the adjacent wall (5) in the region of its overlap with the adhesive tab (10) has a tab end (36) of the tear strip (28) protruding slightly beyond the edge of the wall (2) having the tab (10).
6. 6. Folding box according to point 5 and one of the numbers 1 to 4.
7. 7. Folding box according to item 5 or 6, wherein the wall with the adhesive flap (10) has a deep stamping (37) at the edge below the protruding beyond this edge tab end (36).
8. 8. Folding box according to one of the numbers 5 to 7, wherein the tab end (36) is trapezoidal.
9. A carton according to any one of items 5 to 8, wherein the tab end (36) is delimited by score lines (29, 30) penetrating or penetrating the polyethylene layer (38).
10. 10. Folding box for frozen food with
    • Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) defining a volume for receiving frozen food,
    • a tear strip (28) extending in at least one wall (2 to 5),
    • the walls being adjoined to one another at longitudinal edges and connected to a tube walls (2 to 5) and hinged to transverse edges of the aforementioned walls further walls (11, 12) which close the end openings of the tube, and
    • the tear strip (28) completely circulating over the walls (2 to 5), which are hinged together at longitudinal edges, or completely circumscribing the walls, which are hinged together at lateral edges, so that the carton is removed by severing the tear strip (28 ) is separable into two parts (42, 43).
11. 11. Folding box according to item 10, wherein the at least one wall (2, 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34),
12. 12. Folding box according to item 10 or 11 and one of the items 1 to 9.
13. 13. Folding box according to any one of the numbers 10 to 12, wherein the tear strip (28) parallel to the longitudinal edges or the transverse edges of the walls (2 to 5).
14. 14. Folding box according to any one of the numbers 10 to 13, wherein at least two mutually opposite walls (2 to 5) in each case in the middle of a fold line (39, 40) which extend parallel to the longitudinal edges, if the Tear strip (28) rotates over the walls, which are hinged together at longitudinal edges, and which run parallel to the transverse edges, if the tear strip rotates over walls which are hinged together at transverse edges.
15. 15. A carton according to any one of items 10 to 14, wherein the ratio of the lengths of the carton on both sides of the tear strip (28) is about 2: 1 to 5: 1.
16. 16. Folding box for frozen food with
    • Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32), which limit a volume for receiving frozen food, and
    • a tear strip (28) extending in at least one wall (2 to 5),
    • wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34) and
    • the tear strip extends from one end of a further fold line in a wall (2 to 5) over at least one wall and ends at the other end of the further fold line, so that after removal of the tear strip (28), a flap is formed around the further fold line is foldable.
17. 17. Folding box according to item 16 and one of the items 1 to 15.
18. 18. Folding box for frozen food with
    • Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32), which limit a volume for receiving frozen food, and
    • a tear strip (28) extending in at least one wall (2 to 5),
    • wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34) and
    • the tear strip (28) completely delimits a coherent surface in at least one wall so that, after the tear strip (28) has been severed, the part of the at least one wall bounded by the tear strip (28) can be removed therefrom.
19. 19. Folding box according to paragraph 10 and one of the numbers 1 to 17.
20. 20. Folding box according to one of the numbers 1 to 19, in which the carton is a chromo cardboard (GC).
21. 21. Folding box according to one of the numbers 1 to 20, wherein at least one wall (2 to 5) on the outside has a print and / or coloring.
22. 22. Folding box according to one of the numbers 1 to 21, wherein the reinforcing strip (28) is glued to the layer (38) made of polyethylene.
23. A blank for making a carton according to any one of items 1 to 22, comprising at least one wall (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside and one in the at least one wall (2 to 5) extended tear strip (28), wherein the at least one wall (2 to 5) along the tear strip (28) on the inside has an elongated recess (33) in which a reinforcing strip (34) is connected, which is connected to the layer (38) of polyolefin and its maximum strength about the depth of the recess (33) corresponds.
24. A blank for making a carton according to any one of items 1 to 22, comprising at least one wall (2 to 5) of a cardboard of primary fibers having a layer (38) of a polyolefin on the inside (32) and one in the at least one wall (2 to 5) elongated tear strips (28), the at least one wall (2 to 5) along the tear strip (28) having a reinforcing strip (34) bonded to the polyolefin layer (38) and the at least one wall (2 to 5) in the outer side on both sides of the tear strip scoring lines (29, 30), the depth of which is such that they do not penetrate into the layer (38) of polyolefin on the inside (32) or not this layer (38) penetrate.
25. 25. Cutting to 24 and 23.
26. A blank for producing a carton according to any one of items 1 to 22, comprising at least one wall (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) and one in the at least one wall elongated tear strip (28), the at least one wall (2 to 5) along the tear strip (28) having a reinforcing strip (34) bonded to the polyolefin layer (38), at least one wall at the longitudinal edge and / or at the transverse edge has an adhesive tab (10) which is glued to the inside of another wall (5) and the other wall (5) in the area in which they in overlapping arrangement with the adhesive flap (10) can be brought to be glued to the adhesive flap, a tab end (36) of the tear strip (28) which protrudes slightly beyond the edge (35) of this wall (5).
27. 27. Cutting to paragraph 26 and one of the numerals 23 to 25.
28. A blank for making a carton according to any one of items 1 to 22, comprising at least one wall (2 to 5, 11, 12) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) and an in at least one wall extending tear strip (28), wherein the walls (2 to 5) at longitudinal edges mutually steered and closable to a tube walls and hinged to transverse edges of the aforementioned walls further walls (11, 12), with which the end-side openings the tube are closable, the tear strip extends completely over the walls (2 to 5) away, which are guided at longitudinal edges to each other, or completely over the walls (2, 4, 11, 12) away, which guided at transverse edges together are such that the blank by separating the tear strip (28) is separable into two parts.
29. 29. Cutting according to paragraph 28 and one of paragraphs 23 to 27.
30. 30. A blank according to item 28 or 29, wherein the at least one wall (2 to 5, 11, 12) on the inside (32) along the tear strip (28) with a reinforcing strip (34) is connected.
31. A blank for making a carton according to any one of items 1 to 22, having at least one wall (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) and an in at least one wall (2 to 5) extending tear strip (28), wherein the at least one wall on the inside (32) along the tear strip (28) with a reinforcing strip (34) is connected and the tear strip (28) from one end of another Folding line in a wall extends over at least one wall and ends at the other end in the further fold line, so that after separation of the tear strip (28) a flap is formed, which is foldable about the further fold line.
32. 32. Blank after item 31 and one of items 23 to 30.
33. 33. A blank for producing a carton according to any one of items 1 to 22, having at least one wall (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) and one in at least one wall Tear strip (28), wherein the at least one wall (2 to 5) on the inside (32) along the tear strip with a reinforcing strip (34) is connected and the tear strip (28) in at least one wall (2 to 5) a contiguous surface completely umgrent, so that after separating the tear strip (28) of this bounded part of the at least one wall is removable from this.
34. 34. Blank after paragraph 33 and one of paragraphs 23 to 32.
35. 35. Blank according to any one of items 23 to 34, with at least one further characteristic of a part of the carton as defined in one of the numbers 1 to 22.
36. 36. A device for producing foldable flat material for forming a carton for frozen food with a tear strip or a blank for producing such a carton according to one of the numbers 1 to 35 with
    • a groove wheel (46) for inserting an elongated recess (33) into a web material (49) made of cardboard with a layer (38) of a polyolefin on the inside,
    • a feed device (47) which rotatably supports the groove wheel and with which the groove wheel (46) can be pressed against the inside of the web material (49) with an adjustable pressure force,
    • a rotatably mounted counter-roller (48) whose axis is arranged parallel to the axis of the grooved wheel (46) against whose circumference the grooved wheel (46) can be pressed,
    • a device for feeding the web material (49) between the groove wheel (46) and counter-roller (48),
    • a sensor (54) for determining the depth of the recess (33) impressed into the inside of the web material (49) by means of the groove wheel (46), which is arranged behind the groove wheel (46) in the direction of passage of the web material (49),
    • a control device (55) connected to the sensor (54) and the feed device, which controls the pressure force of the groove wheel (46) as a function of the depth of the depression (33) determined by the sensor (54), and
    • means for feeding (50) a reinforcing strip (34) into the elongated recess (33) of the web material (49) and an adhesive between reinforcing strip (34) and depression (33).
37. 37. Apparatus according to item 36, wherein the means (50) for feeding the web material (50) and / or the means for feeding the reinforcing strip (34) comprises a supply roll for the web material and / or a supply roll (51) for the reinforcing strip (51). 34) and one of the respective Supply roll associated with roller bearing for rotatably supporting the supply roll has.
38. 38. Device according to item 36 or 37, wherein the means for feeding (50) the reinforcing strip (34) introduces the web material (49) onto the circumference of the counter roll (48) into the recess (33).
39. 39. Device according to any one of items 36 to 38, wherein the means for supplying and means for guiding the web material are so aligned on the counter roll (48) that the web material (49) at least partially wraps around the counter roll (48) and the Means for feeding (50) the reinforcing strip (34) introduces the reinforcing strip in the wrapping area of the counter roll (48) into the elongated recess (33) of the web material (49) and / or the sensor (54) detects the depth of the recess in the wrapping area.
40. 40. Device according to one of the numbers 36 to 39, wherein the grooved wheel (46) has rounded flanks.

Fig. 1

einen flachliegenden Zuschnitt einer erfindungsgemäßen Faltschachtel in der Draufsicht;

Fig. 2

eine Faltschachtel gebildet aus dem Zuschnitt von Fig. 1 in einer perspektivischen Ansicht;

Fig. 3

dieselbe Faltschachtel während des Öffnens durch Heraustrennen des Aufreißstreifens in einer perspektivischen Ansicht;

Fig. 4

dieselbe Faltschachtel geöffnet nach vollständigem Heraustrennen des Aufreißstreifens in einer perspektivischen Ansicht;

Fig. 5

dieselbe Faltschachtel nach Wiederverschließen in einer perspektivischen Ansicht;

Fig. 6

eine andere Faltschachtel gemäß der Erfindung in einer aufgeklappten Stellung in einer perspektivischen Ansicht;

Fig. 7

dieselbe Faltschachtel nach dem Verschließen in einer perspektivischen Ansicht;

Fig. 8

dieselbe Faltschachtel nach dem Heraustrennen des Aufreißstreifens in einer perspektivischen Ansicht;

Fig. 9

eine Anlage zum Herstellen von Karton mit einer Schicht aus Polyolefin und einem Verstärkungsstreifen für eine Faltschachtel für Tiefkühlkost in einer schematischen Ansicht.

The invention will be explained in more detail with reference to the accompanying drawings of exemplary embodiments. The drawings show:

Fig. 1

a flat blank of a carton according to the invention in plan view;

Fig. 2

a carton formed from the blank of Fig. 1 in a perspective view;

Fig. 3

the same carton during opening by separating the tear strip in a perspective view;

Fig. 4

the same carton opened after complete separation of the tear strip in a perspective view;

Fig. 5

the same carton after resealing in a perspective view;

Fig. 6

another carton according to the invention in an unfolded position in a perspective view;

Fig. 7

the same carton after closing in a perspective view;

Fig. 8

the same carton after the separation of the tear strip in a perspective view;

Fig. 9

a plant for producing cardboard with a layer of polyolefin and a reinforcing strip for a carton for frozen food in a schematic view.

In the following explanation of various embodiments, the parts provided with the same name are provided with the same reference numeral, wherein the parts are designated further embodiments by a point provided behind the reference numeral and individual reference numerals behind this point.

According to FIG. 1 has a blank 1 walls 2, 3, 4, 5, which are adjacent to each other at longitudinal edges 6, 7, 8. Furthermore, the wall 2 has hinged to a longitudinal edge 9, an adhesive flap 10.

The blank 1 has additional walls 11, 12 which are hinged to transverse edges 13, 14 of the wall 4. At transverse edges 16, 17 of the wall 2 more adhesive tabs 18, 19 articulated. Finally, at transverse edges 20, 21 of the wall 3 and 22, 23 of the wall 5 dust flaps 24, 25 and 26, 27 hinged. The aforementioned linkages are formed by creasing lines.

Parallel to the transverse edges extends across all the walls 2, 3, 4, 5 and the adhesive flap 10, a tear strip 28. This is bounded by parallel score lines 29, 30 in the outer side 31 of the blank 1 side. Further, it comprises on the inside 32 of the blank 1 an embossed elongated recess 33. In the recess 33, a reinforcing strip 34 is glued.

In the wall 5, the tear strip 28 has at the outer longitudinal edge 35 of the wall 5 a trapezoidal tab end 36 bounded by diverging sections of the score lines 29,30. The tab end 36 projects slightly (approximately 1 mm) outward beyond the longitudinal edge 35.

Furthermore, the wall 2 and the adhesive flap 9 has a strip-shaped embossing 37, which extends over the longitudinal edge 9 away.

The blank 1 is made of chromo-cardboard, which has a layer 38 of polyethylene on the inside 32. The scribe lines 29, 30 do not generally engage in the layer 38 of polyethylene. In the region of the flap end 36, they penetrate the layer 38 of polyethylene.

The walls 3, 5 have approximately in the middle on the same side of the tear strip 28 in each case a longitudinally extending creasing line 39, 40. The creasing lines 39, 40 each extend about a quarter to a third of the length of the wall 3, 5. The reinforcing strip 34 is made of oriented polypropylene and has an adhesive film on the inside with which it is attached to the bottom of the recess 33.

The blank 1 is further processed by the wall 2 is folded around the fold line 6 against the inside of the blank 1 and the wall 5 to the fold line 8 against the inside 32 of the blank 1 and the outside of the adhesive flap 9 and glued to it. This can be done by the manufacturer of the carton or by the producer of the frozen food.

The blank 1 is stacked either in this pre-glued state or in the state according to Fig. 1 piled up and provided to the producer of frozen food. Since the reinforcing strip 34 is disposed within the elongated recess 33, the stack is uniform or the blanks are not oriented obliquely in the stack, so that the stack is stable.

For filling frozen food, the pre-glued blanks 1 are removed from the stack and the not yet pre-glued blanks 1 removed and pre-glued and erected into a rectangular tube. Frozen food is then filled through the openings on the transverse edges and then these openings are closed. For this purpose, first the dust flaps 24 to 27 are folded into the openings and then the adhesive tabs 18, 19 folded over the dust flaps and finally the other walls 11, 12 folded against the other adhesive tabs 18, 19 and glued to these.

The finished carton 41 is in FIG. 2 shown. The tear strip 28 can be easily grasped at the tab end 36 protruding laterally over the edge with the embossing 37.

According to Fig. 3 and 4 the tear strip 28 is cut out all around and thereby the carton is divided into a larger lower part 42 and a smaller upper part 43. As the tear strip 28 is severed, the carton is torn open along the score lines 29, 30 and the layer 38 is severed along the edges of the reinforcing strip 34. The portion of the layer 38 adhered to the reinforcing strip 34 remains on the reinforcing strip 34 and is severed with the tear strip 28. In a way, the carton is opened without the carton frayed.

The larger part 42 forms a container for remaining frozen food and the smaller part 43 a cap to reclosure of the container.

To reclosure of the carton 41, the opposing walls 2, 4 of the lower part 42 are slightly compressed, so that the walls 5, 6 in the upper area along the fold lines 39, 40 are folded slightly inwards. As a result, the cross section of the lower part 42 is reduced and the upper part 43 of the carton 41 can be pushed onto the lower part 42. In Fig. 5 the carton 41 is shown in a reclosed arrangement. Residual quantities can be stored especially in the case of supply packaging.

The Fig. 6 to 8 show a further cuboid carton 41.1, which has a flatter geometry. In this carton 41.1, the dust flaps are replaced by insertion tabs 24.1, 25.1, which can be inserted into slots of the further adhesive tabs 18.1, 19.1. At the same time, the adhesive flap 10.1 is laterally with Inserted tabs 44.1, 45.1 provided, which can be inserted into slots of the other adhesive tabs 18.1, 19.1. The adhesive flap 10.1 is dimensioned so that when inserting the push-in tabs 44.1, 45.1 in the adjacent walls 18.1, 19.1 a shell is formed, which can be filled and then closed by folding the wall 4.1. The walls 5.1, 11.1, 12.1 are glued to the outer sides of the adjacent adhesive tabs 10.1, 18.1, 19.1 of the shell.

Fig. 7 shows the carton 41.1 in the closed state. The tear strip 28.1 again runs perpendicular to the longitudinal edges of the walls 2.1, 3.1, 4.1, 5.1, 10.1 around the volume of the folding box 41.1 around.

Fig. 8 shows the carton 41.1 opened after the separation of the tear strip 28.1. As a result, the folding box 41.1 is again subdivided into a larger part 42.1 and a smaller part 43.1, which can be used as a cap for reclosing the larger part 42.1.

According to Fig. 9 a device according to the invention has a groove wheel 46 with rounded edges, which is rotatably mounted in a feed device 47, which can shift the wheel horizontally in the X direction and press with adjustable force against a substrate.

In addition to the groove wheel 46, a counter-roller 48 is arranged. The groove wheel 46 is aligned with the circumference of the counter roll 48, whose axis is parallel to that of the grooved wheel 46.

Furthermore, the system comprises a device, not shown, for feeding web material 49 made of cardboard with a layer of a polyolefin on the Inside, which feeds the web material 49 vertically between the groove wheel 46 and counter-roller 48.

Further, the apparatus comprises a means, not shown, for carrying away the web material 49, which pulls the web material vertically from the counter roll 48.

Thus, the web material 49 is fed between the grooved wheel 46 and the backing roll 48, wraps around half the circumference of the backing roll 48 and is guided diametrically opposite the grooved wheel 46 from the backing roll 48. The grooved wheel 46 presses an elongated recess into the polyethylene-coated inner side of the web material 49.

Furthermore, the device has a device for supplying 50 of the side coated with an adhesive reinforcing strip 34. The means for feeding 50 comprises a rotatably mounted supply roll 51. From this supply roll 51, the reinforcing strip 34 is fed via deflection rollers 52, 53 to the circumference of the counter roll 48. The reinforcing strip 34 is accurately inserted into the recess by the means for feeding the reinforcing strip 50 and adhered thereto. The reinforcing strip 50 wraps around the counter roll 48 in an angular range of 90 ° to 180 °.

The wrap-around region of the counter-roller 48 is assigned a sensor 54, which is designed as a laser depth gauge. The sensor 54 is connected to an electronic control device 55, which in turn is connected to the feed device 47. By permanently monitoring the depth of the recess by means of the sensor 54 and adjusting the pressing force of the grooved wheel 46 by means of the feed device 47 ensures that the recess maintains a predetermined depth.

The thus prepared sheet material 49 can be cut into pieces according to Fig. 1 be further processed. For this purpose, the corresponding blanks are punched, embossed, grooved and slotted.

Claims (15)

Folding carton for frozen food with Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) which delimits a volume for receiving frozen food, A tear strip (28) which extends in at least one wall (2 to 5), Wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) has an elongated recess (33) in which is disposed a reinforcing strip (34) which is integral with the layer (38) of polyolefin is connected and its strength corresponds approximately to the depth of the recess (33). Folding box according to claim 1, wherein the at least one wall (2 to 5) with the recess (33) on the inside (32) on the outer side (31) above the recess (33) has no elevation. Folding box for frozen food, in particular according to claim 1 or 2, with Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) which delimits a volume for receiving frozen food, A tear strip (28) which extends in at least one wall (2 to 5), Wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34) and Wherein the at least one wall (2 to 5) in the outer side (31) on both sides of the tear strip (28) scribing lines (29, 30), the depth of which is dimensioned so that they in the layer (38) made of polyolefin on the inside (32) do not penetrate or penetrate this layer (38). Folding box for frozen food, in particular according to one of claims 1 to 3, with Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) which delimits a volume for receiving frozen food, A tear strip (28) which extends in at least one wall (2 to 5), Wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34), • at least one wall (2) on the longitudinal edge and / or on the transverse edge has an adhesive tab (20) which is glued to the inside of the adjacent wall (5), and • the adjacent wall (5) in the region of its overlap with the adhesive tab (10) has a tab end (36) of the tear strip (28) protruding slightly beyond the edge of the wall (2) having the tab (10). Folded box according to claim 5, in which the wall with the adhesive flap (10) has a deep embossing (37) at the edge below the tab end (36) extending beyond this edge. A carton according to claim 4 or 5, wherein the tab end (36) is defined by score lines (29, 30) which penetrate or penetrate the layer (38) of polyethylene. Folding box for frozen food, in particular according to one of claims 1 to 6, with Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) which delimits a volume for receiving frozen food, A tear strip (28) which extends in at least one wall (2 to 5), The walls being adjoined to one another at longitudinal edges and connected to a tube walls (2 to 5) and hinged to transverse edges of the aforementioned walls further walls (11, 12) which close the end openings of the tube, and Wherein the tear strip (28) completely rotates over the walls (2 to 5), which are hinged together at longitudinal edges, or completely circumscribes the walls, which are hinged to each other at transverse edges, so that the folding box by separating the tear strip ( 28) is separable into two parts (42, 43). A carton according to claim 7, wherein the at least one wall (2, 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34). Folding box according to claim 7 or 8, wherein at least two mutually opposite walls (2 to 5) each in the middle of a folding line (39, 40) which are parallel to the longitudinal edges if the tear strip (28) revolves over the walls which are hinged together at longitudinal edges and which are parallel to the transverse edges if the tear strip rotates over walls at transverse edges are hinged together. Folding box for frozen food, in particular according to one of claims 1 to 9, with Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of polyolefin on the inside (32) defining a volume for receiving frozen food, and A tear strip (28) which extends in at least one wall (2 to 5), Wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34) and • the tear strip extends from one end of another fold line in a wall (2 to 5) over at least one wall and ends at the other end of the further fold line, so that after removal of the tear strip (28) a flap is formed, which is around the other Folding line is foldable. Folding box for frozen food, in particular according to one of claims 1 to 10, with Walls (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside (32) defining a volume for receiving frozen food, and A tear strip (28) which extends in at least one wall (2 to 5), Wherein the at least one wall (2 to 5) on the inside (32) along the tear strip (28) is connected to a reinforcing strip (34) and • The tear strip (28) in at least one wall completely bounds a contiguous surface, so that after separation of the tear strip (28) of the bounded by this part of the at least one wall is removable therefrom. Blank for producing a carton according to one of claims 1 to 11, having at least one wall (2 to 5) of a cardboard of primary fibers with a layer (38) of a polyolefin on the inside and one in the at least one wall (2 to 5) elongated tear strip (28), the at least one wall (2 to 5) along the tear strip (28) having on the inner side an elongated recess (33) in which a reinforcing strip (34) is arranged, which is connected to the layer (38). is made of polyolefin and whose thickness corresponds approximately to the depth of the depression (33). A device for producing foldable flat material for forming a folded box for frozen food with a tear strip or a blank for producing such a carton according to one of claims 1 to 12 with A groove wheel (46) for introducing an elongated recess (33) into a web material (49) made of cardboard with a layer (38) of a polyolefin on the inside, A feed device (47) which rotatably supports the grooved wheel and with which the grooved wheel (46) can be pressed against the inside of the web material (49) with an adjustable pressing force, A rotatably mounted counter-roller (48) whose axis is arranged parallel to the axis of the groove wheel (46), against whose circumference the groove wheel (46) can be pressed, A device for feeding the web material (49) between the groove wheel (46) and counter-roller (48), A sensor (54) for determining the depth of the depression (33) impressed into the inside of the web material (49) by means of the groove wheel (46), which is arranged behind the groove wheel (46) in the direction of passage of the web material (49), A control device (55) connected to the sensor (54) and the feed device, which controls the pressing force of the groove wheel (46) as a function of the depth of the depression (33) determined by means of the sensor (54), and • means for feeding (50) a reinforcing strip (34) into the elongated recess (33) of the web material (49) and an adhesive between reinforcing strip (34) and recess (33). Apparatus according to claim 13, wherein the means for feeding and means for guiding the sheet material are aligned with the backing roll (48) such that the sheet material (49) at least partially wraps around the backing roll (48) and the means for feeding (50). of the reinforcing strip (34) introduces the reinforcing strip in the wrap area of the counter roll (48) into the elongated recess (33) of the web material (49) and / or the sensor (54) detects the depth of the depression in the wrap area. Apparatus according to claim 13 or 14, wherein the grooved wheel (46) has rounded flanks.

Images