DE202009009934U1 - Folding box for frozen food and apparatus for producing the folding box - Google Patents

Abstract

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,
• one in at least one wall (2 to 5) extending tear strip (28),
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).

Description

The The invention relates to a folded box for frozen food and to a device for Making the carton.

folding cartons for frozen foods for example for fish sticks or vegetables used. Due to this purpose, food-grade materials must be used be used. As a result, one uses as starting material Primary fiber paperboard (also called "fresh fiber box"), because a secondary fiber board (also called "recycling cardboard") not for reasons of hygiene may be used. The primary fiber board is coated on the inside with polyethylene, so that the material not soaked with fat or liquid. The layer of polyethylene is extruded onto the cardboard.

Known Folding cartons for Frozen foods are openable, by at least one adhesive bond between a wall and a adjacent wall of the carton is broken. Are known also folding boxes for Frozen food with a tear strip bounded by a perforation, which can be opened by severing the tear strip along the perforations are. The known cartons are not easy to handle. A reclosure after taking frozen food can not, which makes further storage in the folding box of frozen food more difficult. This is disadvantageous in particular in the case of supply packs which are suitable for several Meals are sized. For example, folding cartons for fish sticks meanwhile so that they are 2 × 10 up to 2 × 16 fish sticks be able to record. In addition, when opening the Packaging carton residues get into the food and its quality affect. This can be particularly easy by separating the perforation Pulling out the tear strip happen. In addition, arise when tearing the tear strip unclean, frayed separation edges, the appearance of the Impact folding carton.

From that Based on the object of the invention, a carton for frozen foods with cheaper To create handling properties. Furthermore, a device be created for the production of the carton.

The Task is by a carton with the features of the claim 1 solved.

• • 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 limit a volume for receiving frozen food,
• A tear strip which extends 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.

Of the tear the carton according to the invention is lightweight due to the reinforcing strip to open. This results in smooth separation edges and the cardboard does not fray out. It is particularly advantageous that the resistant layer of Polyolefin by the thus sufficiently firmly connected reinforcing strip is separated. The opened one Folding box has a pleasing appearance and cardboard residues do not fall into the frozen food into it. Due to the arrangement of the reinforcing strip in the elongated Deepening can the cartons lie flat and evenly horizontally layered in stacks at the producer of frozen food for packaging the frozen food be provided without the stacks due to local material buildup or locally elevated wall thickness slip or tip over. Furthermore is the frozen food when filling in does not affect the carton, because the reinforcing thread in the oblong Well hidden and is not projecting into the volume for receiving the frozen food. The carton thus has excellent storage, transport and cartoning properties.

The Polyolefin coated with the paperboard is preferably one Polyethylene. The polyolefin may in particular also be a polypropylene be. The invention also relates to cartons in which the layer on the inside of the box from other suitable Plastic as a polyolefin. Basically, the invention relates on cardboard boxes on the inside with a food-safe and frozen layer are made of plastic.

It It goes without saying that the reinforcing strip also consists of a food-compatible and frozen material consists. Preferably exceeds the tensile strength of the reinforcing strip the tensile strength of the polyolefin, with which the cardboard on the inside is coated. For example, there is the reinforcing strip made of oriented polypropylene. It is stretched and stretched and heat-set polypropylene.

The reinforcing strip can be different Have cross-sectional shapes. In particular, he can use a reinforcing thread, for. B. with a circular cross-section, or a reinforcing tape, z. B. 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.

Of the reinforcement strips can be connected in various ways with the layer of polyolefin, in particular by sealing, welding or by gluing. Prefers is the sticking. Preferably, the reinforcing strip is already present bonding to the polyolefin layer with an adhesive provided so that he by introducing into the depression with the Layer is connectable.

above Information on the usable materials of the layer on the inside of carton and reinforcing strip to the possible Cross-sectional shapes of the reinforcing strip and also apply to its association with the polyolefin layer for the explained below Variants of the invention according to claims 3, 5, 10, 15, 17, 22, 23, 25, 27, 29, 31 and 34.

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 basis weight (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).

Further The task is accomplished by a folding box with the characteristics of the Claim 3 solved.

• – 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 delimits a volume for receiving frozen food,
• A tear strip extending in at least one wall,
• - Wherein the at least one wall is connected on the inside along the tear strip with 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 not penetrate this layer.

advantageous Embodiments of the carton are given in subclaims. The carton according to claim 3 may be advantageous to the features of at least one of the preceding claims exhibit.

Of the tear the carton according to the invention is lightweight due to the reinforcing strip to open. This results in smooth separation edges and the cardboard does not fray out. It is particularly advantageous that the resistant layer of Polyolefin by the thus sufficiently firmly connected reinforcing strip is separated. The opened one Folding box has a pleasing appearance and cardboard residues do not fall into the frozen food into it. The scribe lines facilitate the tearing open of the packaging but not their tightness. You can especially in the field of Insert or the base of a multi-layer carton ends. Preferably The scribe lines penetrate the entire cardboard or at least a substantial one Part of it. The scribe lines favor Cutting out the tear strip without fraying the box. The scribe lines can be on the flanks of the recess be aligned or in between or outside the same.

Further The task is accomplished by a folding box with the characteristics of the Claim 5 solved.

• – 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 delimits a volume for receiving frozen food,
• A tear strip extending in at least one wall,
• Wherein the at least one wall is connected on the inside along the tear strip with a reinforcing strip,
• - Has at least one wall on the longitudinal edge and / or on the transverse edge an adhesive flap which is glued to the inside of the adjacent wall, and
• - The adjacent wall in the region of its overlap with the adhesive flap has a tab end of the tear strip, which protrudes beyond the edge of the wall having the adhesive flap.

advantageous Embodiments of the carton are given in subclaims. The carton according to the invention Advantageously, the features of at least one of the preceding claims exhibit.

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 made of polyolefin is separated by the sufficiently 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.

Further The task is accomplished by a folding box with the characteristics of the Claim 10 solved.

• – 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,
• – 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 delimits a volume for receiving frozen food,
• A tear strip extending in at least one wall,
• Wherein the at least one wall is connected on the inside along the tear strip with a reinforcing strip,
• - 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, and comprise
• - Wherein the tear strip completely rotates over the walls, which are guided at longitudinal edges together, or completely rotates over the walls, which are guided at transverse edges to each other, so that the folding box is separable by separating the tear strip in two parts.

advantageous Embodiments of the carton are given in subclaims. The carton may advantageously also have the features at least have one of the preceding claims.

Of the tear the carton according to the invention is lightweight due to the reinforcing strip to open. This results in smooth separation edges and the cardboard does not fray out. It is particularly advantageous that the resistant layer of Polyolefin by the thus sufficiently firmly connected reinforcing strip is separated. The opened one Folding box has a pleasing appearance and cardboard residues do not fall into the frozen food into it. After separating the carton into two parts, the larger part as a container for the rest Frozen food and the smaller part can be used as a cap to reclosure of the larger part serves. For this purpose, the cap can be slipped on the larger part. The tear strip can at different levels the transverse edges on the walls circulate. In particular, he can at least partially with respect to the edges inclined, curved or stepped Course have. Preferably runs the tear strip parallel to the long sides edges or the transverse edges the walls.

According to one Design that facilitates reclosing the carton, have at least two opposing walls each in the middle of a fold line, which is parallel to the longitudinal side edges run if the tear strip on the Walls are revolving on the longitudinal side edges are hinged to each other, and which run parallel to the transverse edges, if the tear strip runs over walls, the on lateral edges are hinged together. The fold lines enable the carton the open end to squeeze something so that the separated cap can be easily put on. The fold lines are preferred score lines.

According to one preferred embodiment The relationship the lengths the carton on both sides of the tear strip about 2: 1 to 5: 1. Because of these length ratios Can the carton by cutting out the tear strip in a container for the rest Frozen food and divided into a cap for reclosing the container.

Further The task is accomplished by a folding box with the characteristics of the Claim 15 solved.

• – 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 delimits a volume for receiving frozen food,
• A tear strip extending in at least one wall,
• - Wherein the at least one wall is connected on the inside along the tear strip with a reinforcing strip and
• - The tear strip extends from one end of another fold line in a wall starting over at least one wall and ends at the other end of the further fold line, so that after separation 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 carton according to the invention Advantageously, the features of at least one of the preceding claims exhibit.

Of the tear the carton according to the invention is lightweight due to the reinforcing strip to open. This results in smooth separation edges and the cardboard does not fray out. It is particularly advantageous that the resistant layer of Polyolefin by the thus sufficiently firmly connected reinforcing strip is separated. The opened one Folding box has a pleasing appearance and cardboard residues do not fall into the frozen food into it. This folding box bounds the tear strip a flap, which after removal of the tear strip by flaps around the Fold line open can be. The further fold line is in particular by an imaginary Just defined between the two ends of the tear strip, where the flap can be folded around this imaginary straight line. Prefers the further fold line is a crease line or another prepared Folding line around which the flap can be unfolded.

Further The task is accomplished by a folding box with the characteristics of the Claim 17 solved.

• – 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 Aufreißstreifen mit einem Verstärkungsstreifen verbunden ist und
• – der Aufreißstreifen in mindestens einer Wand eine zusammenhängende Fläche vollständig umgrenzt, so dass nach Heraustrennen des Aufreißstreifen 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 delimits a volume for receiving frozen food,
• A tear strip extending in at least one wall,
• - Wherein the at least one wall is connected on the inside along the tear strip with 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 this bounded by this part of the at least one wall is removable from this.

advantageous Embodiments of the carton are given in subclaims. The carton according to the invention Advantageously, the features of at least one of the preceding claims exhibit.

Of the tear the carton according to the invention is lightweight due to the reinforcing strip to open. This results in smooth separation edges and the cardboard does not fray out. It is particularly advantageous that the resistant layer of Polyolefin by the thus sufficiently firmly connected reinforcing strip is separated. The opened one Folding box has a pleasing appearance and cardboard residues do not fall into the frozen food into it. In this embodiment, the tear strip allows to detach a part from at least one wall to pass through the opening thus created to intervene inside the carton.

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 one preferred embodiment has at least one wall on the outside a print and / or a coloring on.

The Folding box can have different geometries. Prefers is it cuboidal. she but may also be circular cylindrical or prismatic, etc.

According to one Embodiment, the carton hinged to each other at the longitudinal edges and to a tube closed walls and on lateral edges the aforementioned walls hinged further walls on top of the end-side openings the tube shut down. In this way, in particular a cuboid carton can be realized become.

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 folding box from one-piece blanks. By gluing the tube and the end-side openings of the tube are closed.

Further The invention relates to blanks for producing a folding box according to one the previously explained Claims.

One 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 in the at least one wall extending tear strip, wherein the at least one Wall along the tear strip on the inside an elongated Recess in which a reinforcing strip is arranged, which is connected to the layer of polyolefin and its maximum strength about the depth of the depression corresponds.

One further inventive blank has at least one wall of a cardboard of primary fibers with a layer of a polyolefin on the inside and one in the at least one wall stretched tear strips on, with the at least one wall along the tear strip a reinforcing strip which is connected to the layer of polyolefin and the at least one wall in the outside on both sides of the tear strip Has scribe lines whose depth is dimensioned so that they in the Polyolefin layer on the inside does not penetrate or these Not penetrate layer.

One further inventive blank has at least one wall of a cardboard of primary fibers with a layer of a polyolefin on the inside and one in the at least one wall stretched tear strips on, with the at least one wall along the tear strip a reinforcing strip which is connected to the layer of polyolefin, at least one Wall on the longitudinal side Edge and / or on the transverse edge has a glue flap, the with the inside of another wall is glued and the other Wall in the area where it overlaps with the Adhesive flap can be brought to be glued to the adhesive flap, a tab end of the tear strip that has something over the edge of this wall protrudes.

One further inventive blank has Walls off a cardboard box of primary fibers with a layer of a polyolefin on the inside and a in at least one wall extending tear strip, wherein the at least a wall on the inside along the tear strip with a reinforcing strip connected to the walls longitudinal edges connected to each other and can be closed to a tube walls and on lateral edges of the aforementioned walls hinged further walls comprise, with which the end-side openings of the tube are closable, the tear strip completely over the Walls away runs, the on the longitudinal side edges are directed to each other, or completely across the walls, the on lateral edges are hinged to each other, so that the cut by separating out of the tear strip is separable into two parts.

One further inventive blank has Walls off a cardboard box of primary fibers with a layer of a polyolefin on the inside and a in at least one wall extending tear strip, wherein the at least a wall on the inside along the tear strip with a reinforcing strip connected and the tear strip from one end of another fold line in a wall starting over at least a wall runs and at the other end in the further fold line ends, so that after Cutting out the tear strip a flap is formed, which folds around the further folding line is.

One further inventive blank has Walls off a cardboard box of primary fibers with a layer of a polyolefin on the inside and a in at least one wall extending tear strip, wherein the at least a wall on the inside along the tear strip with a reinforcing strip connected and the tear strip in at least one wall a contiguous area completely bounded, so that after Cutting out the tear strip the bounded by this part of the at least one wall of this is removable.

Prefers The blank is a one-piece blank, with the walls over fold lines hinged to each other. The fold lines are preferably score lines. According to embodiments the blank has at least one further feature of a part the above explained Folding box on.

Further The object is achieved by a device having the features of the claim 34 solved.

• • 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 Bahmmaterials 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 depression 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 whose axis is arranged parallel to the axis of the grooved wheel against the circumference of which 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 depression 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
• A means for feeding a reinforcing strip into the elongated recess of the web material and an adhesive between the reinforcing strip and the recess.

at the device according to the invention forms the counter roll a substrate that is pressed in the elongated Deepening by means of the grooved wheel in the inside of the web material prevents a bump on the outside of the web material forms. Further, by regulating the depth of the elongated Deepening ensures that these are so deep in the web material is introduced, as is required, the reinforcing strip to arrange in the recess without him beyond the level of the inside the web material protrudes next to the recess. When introducing The recess in the web material can be taken into account that fresh fiber board a reset or "Memory" effect which causes the depth of the depression in a period of time after their production decreases slightly. For compensation, the Deepened targeted slightly deeper pressed than required to the reinforcing strip completely in it. The initial depth depends on the web material incorporated recess of the machine speed and the used material. The initial depth is preferred chosen so that after expiry of the reset operations the Deepening at least as deep is that of the reinforcing strip no over the inside of the web material protrudes next to the recess and no elevations on the outside of the Web material present.

According to one Another embodiment, the means for supplying the Web material and / or the means for supplying the reinforcing strip a supply roll of the web material and / or a supply roll for the reinforcing strip and one of the respective supply roll associated roller bearing for rotatable bearings of the supply roll. In principle, it is also possible, the web material and / or the reinforcing strip in the form of flat strips, which can be removed from a pile.

According to one Design leads the device for feeding the reinforcing strip that Web material on the circumference of the counter roll in the recess. Here, the counter roll as a base for the pressing of the reinforcing strip be used. Preferably, the means for supplying the reinforcement strips under bias to the web material on the circumference of the backing roll at.

The Adhesive may be from the means for feeding the reinforcing strip and the adhesive separately between reinforcing strips and adhesive be introduced. Preferably, the reinforcing strip is from the outset provided with an adhesive, so that the means for supplying the reinforcing strip and the adhesive during insertion of the reinforcing strip in the oblong Deepening at the same time the adhesive between reinforcing strips and depression applied.

According to one Embodiment are a means for supplying and means for carrying away the Web material so aligned on the backing roll that the web material the counter roll at least partially wraps around and the device for feeding the reinforcing strip the reinforcing thread in the wrap area of the opposite side in the elongated recess of the web material introduces and / or the sensor the depth of the depression in the wrap detected. The wrap around the counter roll forms a base for the Gluing the reinforcing strip and for the measurement of depth. The wrapping area is for example 180 °. This favored Advantageous arrangement of the means for feeding and the means for lead away of the web material on the same side of the backing roll.

According to one Design has the Nutrad rounded edges. The rounded flanks cause the depression to be gently introduced into the web material will and will help avoid bumps 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 is pressed into the inside of a sheet material of cardboard with a layer of a polyolefin on the inside using a corresponding counter pressure on the outside of the sheet material,
• • the depth of the indented depression remains fend and / or repeatedly determined,
• • 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 connected to the layer of polyolefin.

According to one Embodiment of the method is the depth of the depression on a predetermined value, which ensures that at a decrease the depth of the depression due to a return effect of within the elongated one Recessed reinforcing strips no over the level of the inside of the sheet material next to the recess stands out and the outside of the web material the well is free of surveys.

The Invention is described below with reference to the accompanying drawings of embodiments explained in more detail. The Drawings show:

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

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

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

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

5 the same carton after resealing in a perspective view;

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

7 the same carton after closing in a perspective view;

8th the same carton after the separation of the tear strip in a perspective view;

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.

at the following explanation various embodiments are the parts bearing the same name with the same name Reference number provided, the parts further embodiments by a point placed behind the reference number and individual Reference numerals are designated behind this point.

According to 1 has a cut 1 walls 2 . 3 . 4 . 5 at the longitudinal edges 6 . 7 . 8th are hinged together. Furthermore, the wall has 2 to a longitudinal edge 9 a glue flap 10 hinged.

The cut 1 has more walls 11 . 12 at the lateral edges 13 . 14 the Wall 4 are articulated. At transverse edges 16 . 17 the Wall 2 are more adhesive tabs 18 . 19 hinged. Finally, on lateral edges 20 . 21 the Wall 3 and 22 . 23 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 over all the walls 2 . 3 . 4 . 5 and the glue flap 10 a tear strip 28 , This one is made of parallel scribe lines 29 . 30 in the outside 31 of the blank 1 laterally limited. Furthermore, it includes on the inside 32 of the blank 1 an embossed oblong depression 33 , In the depression 33 is a reinforcing strip 34 glued.

In the wall 5 has the tear strip 28 at the outer longitudinal edge 35 the Wall 5 a trapezoidal flap end 36 passing through diverging sections of the scribe lines 29 . 30 is limited. The flap end 36 stand something (about 1 mm) outwards over the longitudinal edge 35 in front.

Further, the wall faces 2 and the glue flap 9 a strip-shaped impression 37 on, extending over the longitudinal edge 9 extends.

The cut 1 is made of chromo cardboard on the inside 32 a layer 38 made of polyethylene. The scribe lines 29 . 30 basically do not grab in the layer 38 made of polyethylene. In the area of the flap end 36 penetrate the layer 38 made of polyethylene.

The walls 3 . 5 point approximately in the middle on the same side of the tear strip 28 each one extending in the longitudinal direction crease line 39 . 40 on. The crease lines 39 . 40 each extend about a quarter to a third of the length of the wall 3 . 5 ,

The reinforcing strip 34 It is made of oriented polypropylene and has an adhesive film on the inside that allows it to bottom out 33 is attached.

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

The cut 1 is stacked either in this pre-glued state or in the state according to 1 piled up and provided to the producer of frozen food. Because the reinforcing strip 34 inside the oblong depression 33 is arranged, the stack is evenly or the blanks are not aligned obliquely in the stack, so that the stack is stable.

The pre-glued blanks are used to fill frozen food 1 removed from the stack or 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 straps 24 to 27 folded into the openings and then the adhesive tabs 18 . 19 folded over the dust straps and finally the other walls 11 . 12 against the other adhesive tabs 18 . 19 worked and glued to these.

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

According to 3 and 4 becomes the tear strip 28 round out separately and thus the folding box into a larger lower part 42 and a smaller upper part 43 divided. When removing the tear strip 28 the carton is along the scribe lines 29 . 30 Torn up and the shift 38 along the edges of the reinforcing strip 34 separated. The at the reinforcement strip 34 bonded part of the layer 38 stays on the reinforcement strip 34 and comes with the tear strip 28 separated out. In a way, the carton is opened without the carton frayed.

The bigger part 42 forms a container for remaining frozen food and the smaller part 43 a cap for reclosing the container.

To reclose the carton 41 become the opposite walls 2 . 4 of the lower part 42 something compressed, leaving the walls 5 . 6 in the upper area along the fold lines 39 . 40 something to be folded inside. This will be the cross section of the lower part 42 reduced and the upper part 43 the carton 41 is on the lower part 42 pushed. In 5 is the carton 41 shown in a re-locked arrangement. Residual quantities can be stored especially in the case of supply packaging.

The 6 to 8th show another cuboid carton 41.1 which has a flatter geometry. In this carton 41.1 the dust straps are replaced by tabs 24.1 . 25.1 in slots of other adhesive tabs 18.1 . 19.1 are pluggable. At the same time is the glue flap 10.1 laterally with push-in latches 44.1 . 45.1 provided in the slots of the other adhesive tabs 18.1 . 19.1 are pluggable. The glue flap 10.1 is dimensioned so that when inserting the tuck 44.1 . 45.1 in the neighboring walls 18.1 . 19.1 a shell is formed, which is fillable and then by folding the wall 4.1 can be closed. This will be the walls 5.1 . 11.1 . 12.1 with the outsides of the adjacent adhesive tabs 10.1 . 18.1 . 19.1 glued to the shell.

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 carton 41.1 around.

8th shows the carton 41.1 opened after severing the tear strip 28.1 , This will make the carton 41.1 again in a larger part 42.1 and a smaller part 43.1 divided as a cap to reclosure of the larger part 42.1 is usable.

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

Next to the groove wheel 46 is a counter roll 48 arranged. The groove wheel 46 is on the circumference of the counter roll 48 aligned, whose axis is parallel to that of the Nutrades 46 is.

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

Furthermore, the device has a device, not shown, for carrying away the web material 49 on which the web material is vertical from the counter roll 48 withdraws.

Thus, the web material becomes 49 between the groove wheel 46 and the counter roll 48 fed, wraps around half the circumference of the backing roll 48 and becomes diametrically opposite the groove wheel 46 from the counter roll 48 led away. The groove wheel 46 pressed an elongated recess in the polyethylene-coated inside of the web material 49 one.

Furthermore, the device has a device for feeding 50 of the side coated with an adhesive reinforcing strip 34 on. The device for feeding 50 includes a rotatably mounted supply roll 51 , From this supply roll 51 out becomes the reinforcing strip 34 over pulleys 52 . 53 the circumference of the counter roll 48 fed. The reinforcing strip 34 is exactly by the means for supplying the reinforcing strip 50 placed in the recess and glued there. The reinforcing strip 50 wraps around the counter roll 48 in an angular range of 90 ° to 180 °.

The wrap around the counter roll 48 is a sensor 54 assigned, which is designed as a laser depth gauge. The sensor 54 is with an electronic control device 55 connected, in turn, with the delivery facility 47 connected is. By permanently monitoring the depth of the recess by means of the sensor 54 and adjusting the contact pressure of the Nutrades 46 by means of the delivery device 47 it is ensured that the depression adheres to a predetermined depth.

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

Claims (38)

Carton for frozen food with • walls ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ), which limit a volume for receiving frozen food, • one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ), Wherein the at least one wall ( 2 to 5 ) on the inside ( 32 ) along the tear strip ( 28 ) an elongated depression ( 33 ), in which a reinforcing strip ( 34 ) arranged with the layer ( 38 ) is made of polyolefin and its thickness is at most about the depth of the recess ( 33 ) corresponds. Folding box according to claim 1, wherein the at least one wall / 2 to 5 ) with the depression ( 33 ) on the inside ( 32 ) on the outside ( 31 ) above the depression ( 33 ) has no survey. Carton for frozen food with • walls ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ), which limit a volume for receiving frozen food, • one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ), Wherein the at least one wall ( 2 to 5 ) on the inside ( 32 ) along the tear strip ( 28 ) with a reinforcing strip ( 34 ) and wherein the at least one wall ( 2 to 5 ) in the outside ( 31 ) on both sides of the tear strip ( 28 ) Scribe lines ( 29 . 30 ), the depth of which is dimensioned so that it enters the layer ( 38 ) made of polyolefin on the inside ( 32 ) do not penetrate or this layer ( 38 ) do not penetrate. Folding box according to claim 3 and at least one the claims 1 or 2. Carton for frozen food with • walls ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ), which limit a volume for receiving frozen food, • one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ), Wherein the at least one wall ( 2 to 5 ) on the inside ( 32 ) along the tear strip ( 28 ) with a reinforcing strip ( 34 ), • at least one wall ( 2 ) at the longitudinal edge and / or at the transverse edge an adhesive flap ( 20 ) with the inside of the adjacent wall ( 5 ), and • the adjacent wall ( 5 ) in the region of their overlap with the adhesive flap ( 10 ) a flap end ( 36 ) of the tear strip ( 28 ), which is slightly above the edge of the wall ( 2 ) sticking out the adhesive flap ( 10 ) having. Folding box according to claim 5 and one of claims 1 to 4th Folding box according to claim 5 or 6, wherein the wall with the adhesive flap ( 10 ) at the edge below the tab end projecting beyond this edge ( 36 ) a stamping ( 37 ) having. Folding box according to one of claims 5 to 7, in which the flap end ( 36 ) is trapezoidal. Folding box according to one of claims 5 to 8, in which the flap end ( 36 ) by scribe lines ( 29 . 30 ) which is in the layer ( 38 ) penetrate or penetrate polyethylene. Carton for frozen food with • walls ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ), which limit a volume for receiving frozen food, • one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ) • where the at least one wall ( 2 . 5 ) on the inside ( 32 ) along the tear strip ( 28 ) with a reinforcing strip ( 34 ), the walls are guided at longitudinal edges and closed to a tube walls ( 2 to 5 ) and at transverse edges of the aforementioned walls hinged further walls ( 11 . 12 ), Which close the end openings of the tube, comprise • and wherein the tear strip ( 28 ) completely over the walls ( 2 to 5 ), which are hinged together at longitudinal edges, or completely circumscribing the walls, which are guided at each other at transverse edges, so that the folding box by separating the tear strip ( 28 ) in two parts ( 42 . 43 ) is separable. Folding box according to claim 10 and one of claims 1 to 9th Folding box according to claim 10 or 11, wherein the tear strip ( 28 ) parallel to the longitudinal edges or the transverse edges of the walls ( 2 to 5 ) runs. Folding box according to one of Claims 10 to 12, in which at least two walls ( 2 to 5 ) in the middle of a fold line ( 39 . 40 ), which run parallel to the longitudinal edges, if the tear strip ( 28 ) runs around 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. Folding box according to one of claims 10 to 13, wherein the ratio of the lengths of the folding box on both sides of the tear strip ( 28 ) is about 2: 1 to 5: 1. Carton for frozen food with • walls ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ), which limit a volume for holding frozen food, and • one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ), Wherein the at least one wall ( 2 to 5 ) on the inside ( 32 ) along the tear strip ( 28 ) with a reinforcing strip ( 34 ) and the tear strip from one end of another fold line in a wall ( 2 to 5 ) runs over at least one wall and ends at the other end of the further fold line, so that after separation of the tear strip ( 28 ) A flap is formed, which is hinged to the other folding line. Folding box according to claim 15 and one of claims 1 to 14th Carton for frozen food with • walls ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ), which limit a volume for holding frozen food, and • one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ), Wherein the at least one wall ( 2 to 5 ) on the inside ( 32 ) along the tear strip ( 28 ) with a reinforcing strip ( 34 ) and • the tear strip ( 28 ) completely delimits a coherent surface in at least one wall, so that after separation of the tear strip ( 28 ) of the bounded by this part of the at least one wall is removable from this. Folding box according to claim 17 and one of claims 1 to 16th Folding box according to one of claims 1 to 18, where the carton is a Chromo Cardboard (GC). Folding box according to one of claims 1 to 19, wherein at least one wall ( 2 to 5 ) has an imprint and / or coloring on the outside. Folding box according to one of claims 1 to 20, wherein the reinforcing strip ( 28 ) with the layer ( 38 ) is glued from polyethylene. Blank for producing a folding box according to one of claims 1 to 21 with at least one wall ( 2 to 5 ) from 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 strips ( 28 ), wherein the at least one wall ( 2 to 5 ) along the tear strip ( 28 ) on the inside an elongated recess ( 33 ), in which a reinforcing strip ( 34 ) arranged with the layer ( 38 ) is made of polyolefin and its thickness is at most about the depth of the recess ( 33 ) corresponds. Blank for producing a folding box according to one of claims 1 to 21 with at least one wall ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ) and one in the at least one wall ( 2 to 5 ) extended tear strips ( 28 ), wherein the at least one wall ( 2 to 5 ) along the tear strip ( 28 ) a reinforcing strip ( 34 ) associated with the layer ( 38 ) is made of polyolefin and the at least one wall ( 2 to 5 ) in the outside on both sides of the tear strip scribe lines ( 29 . 30 ), the depth of which is dimensioned so that it enters the layer ( 38 ) made of polyolefin on the inside ( 32 ) do not penetrate or this layer ( 38 ) do not penetrate. Blank according to claim 23 and claim 22. Blank for producing a folding box according to one of claims 1 to 21 with at least one wall ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ) and a tear strip extending in the at least one wall ( 28 ), wherein the at least one wall ( 2 to 5 ) along the tear strip ( 28 ) a reinforcing strip ( 34 ) associated with the layer ( 38 ) is made of polyolefin, at least one wall at the longitudinal edge and / or at the transverse edge an adhesive flap ( 10 ) with the inside of another wall ( 5 ) is glued and the other wall ( 5 ) in the area in which they are in overlapping arrangement with the adhesive flap ( 10 ) can be brought to be glued to the adhesive tab, a tab end ( 36 ) of the tear strip ( 28 ), which is slightly above the edge ( 35 ) of this wall ( 5 ) stands out. Blank according to Claim 25 and one of Claims 22 to 24th Blank for producing a folding box according to one of claims 1 to 21 with at least one wall ( 2 to 5 . 11 . 12 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ) and a tear strip (at least one wall) ( 28 ), 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 ), the walls ( 2 to 5 ) at longitudinal edges directed to each other and can be closed to a tube walls and hinged to lateral edges of the aforementioned walls further walls ( 11 . 12 ), with which the end-side openings of the tube are closable, the tear strip completely over the walls ( 2 to 5 ), which are directed at longitudinal edges to each other, or completely over the walls ( 2 . 4 . 11 . 12 ), which are directed to each other at transverse edges, so that the blank by separating the tear strip ( 28 ) is separable into two parts. Blank according to claim 27 and one of claims 22 to 26th Blank for producing a folding box according to one of claims 1 to 21 with at least one wall ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ) and one in at least one wall ( 2 to 5 ) extended tear strips ( 28 ), wherein the at least one wall on the inside ( 32 ) along the tear strip ( 28 ) with a reinforcing strip ( 34 ) and the tear strip ( 28 ) extends from one end of another fold line in a wall starting over at least one wall and ends at the other end in the further fold line, so that after separating the tear strip ( 28 ) A flap is formed, which is hinged to the other folding line. Blank according to Claim 29 and one of Claims 22 to 28th Blank for producing a folding box according to one of claims 1 to 21 with at least one wall ( 2 to 5 ) from a cardboard of primary fibers with a layer ( 38 ) of a polyolefin on the inside ( 32 ) and a tear strip extending in at least one wall ( 28 ), wherein the at least one wall ( 2 to 5 ) on the inside ( 32 ) along the tear strip with a reinforcing strip ( 34 ) and the tear strip ( 28 ) in at least one wall ( 2 to 5 ) completely circumscribes a contiguous surface, so that after the tear-off strip has been cut out ( 28 ) of the bounded by this part of the at least one wall is removable from this. Blank according to Claim 31 and one of Claims 22 to 30th Cutting according to a the claims 22 to 32 with at least one further feature of a part of Folding box according to one of claims 1 until 21. 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 folding box according to one of claims 1 to 33, having a groove wheel ( 46 ) for introducing an elongated recess ( 33 ) into a sheet material ( 49 ) of cardboard with a layer ( 38 ) of a polyolefin on the inside, • a Nutrad the wheel rotatably supporting delivery device ( 47 ), with which the groove wheel ( 46 ) with an adjustable pressure force against the inside of the web material ( 49 ) is pressable, • a rotatably mounted counter-roller ( 48 ) whose axis is parallel to the axis of the 46 ) is arranged against the circumference of the groove wheel ( 46 ) is pressable, • a device for feeding the web material ( 49 ) between the groove wheel ( 46 ) and counter roll ( 48 ), • a sensor ( 54 ) for determining the depth of the by means of the Nutrades ( 46 ) in the inside of the web material ( 49 ) embossed depression ( 33 ), which in the direction of passage of the web material ( 49 ) behind the groove wheel ( 46 ), • one with the sensor ( 54 ) and the delivery device connected control device ( 55 ), the pressure of the grooved wheel ( 46 ) depending on the means of the sensor ( 54 ) determined depth of the Vertie Fung ( 33 ), and • means for feeding ( 50 ) of a reinforcing strip ( 34 ) into the oblong depression ( 33 ) of the web material ( 49 ) and an adhesive between reinforcing strips ( 34 ) and deepening ( 33 ). Device according to Claim 34, in which the device ( 50 ) for feeding the web material ( 50 ) and / or the means for feeding the reinforcing strip ( 34 ) a supply roll for the web material and / or a supply roll ( 51 ) for the reinforcing strip ( 34 ) and one of the respective supply roll associated roller bearing for rotatably supporting the supply roll. Apparatus according to claim 34 or 35, wherein the means for feeding ( 50 ) of the reinforcing strip ( 34 ) the web material ( 49 ) on the circumference of the counter roll ( 48 ) into the depression ( 33 ). Device according to one of claims 34 to 36, wherein the means for supplying and a device for removing the web material so on the counter-roller ( 48 ) that the web material ( 49 ) the counter roll ( 48 ) at least partially wraps around and the means for supplying ( 50 ) of the reinforcing strip ( 34 ) the reinforcing strip in the wrap area of the counter roll ( 48 ) into the oblong depression ( 33 ) of the web material ( 49 ) and / or the sensor ( 54 ) detects the depth of the depression in the wrap area. Device according to one of Claims 34 to 37, in which the groove wheel ( 46 ) has rounded edges.