Method for producing a package

Abstract

The invention relates to a method for producing circumferential packages of paper rolls, wherein the paper rolls have a wound paper web (2) and two opposite end faces and a circumferential surface connecting the two end faces to each other, wherein the method comprises the following steps: applying a protective material (10) in liquid form to an end section of the paper web (2) by means of at least one application device; wherein the protective material (10) is applied on one or both sides of the end section of the paper web (2); winding the end section of the paper web such that the end section forms at least one outer layer of the paper roll; hardening the protective material (10), thereby forming a protective layer covering the circumferential surface.

Description

Technical Field

[0001] This invention relates to a method for producing circumferential packaging (Umfangsverpackung) of paper rolls. The invention also relates to a method for producing end-face packaging of paper rolls and a method for producing packaging of paper rolls. The paper rolls each have wound paper cores, two opposing end faces, and a circumferential surface connecting the end faces. Background Technology

[0002] Such paper rolls have been known from existing technology for a long time, and they are used, for example, in the papermaking and printing industries. They can be unprinted, for example, as raw paper rolls, or printed as paper rolls.

[0003] These are typically used to transport long paper rolls, sometimes several kilometers in length, from one production site to another for further processing. To prevent damage during transport, the rolls must be packaged and protected. This is usually done by removing the rolls from their production equipment so that their ends can be accessed without shafts. Handling paper rolls is expensive and requires large machinery, as each roll can weigh up to 1.5 tons.

[0004] Packaging is performed in a separate packaging machine that can be operated automatically or semi-automatically. In some cases, the paper rolls are also packaged manually. The packaging typically consists of circumferential wrapping, which is designed to protect the circumferential surface of the paper roll. The packaging also usually has two-end wrapping.

[0005] Conventionally, circumferential packaging is made of two layers of kraft paper with an area weight of, for example, 100 g / m², wherein a waterproof layer, such as a polyurethane layer, may be disposed between the two layers. This waterproof layer is suitable for, for example, an area weight of 20 g / m². Alternatively, circumferential packaging can also exist in the form of a film placed around the paper roll to protect it from external influences, particularly moisture. Of course, the film can also be reinforced with a reinforcing layer, for example, made of cardboard, to achieve mechanical stability and protect the paper layers, for example, from impacts and shocks. End-face packaging is conventionally used in the form of a coated cardboard cap, the diameter of which at least substantially corresponds to, and preferably exactly corresponds to, the diameter of the paper roll. This end cap protects the end face of the paper roll from external influences. The end cap itself has a foldable edge protection, wherein the diameter of the end cap is, for example, larger than the diameter of the paper roll to be packaged. In this case, the end cap protrudes and can be folded. The untreated portion then forms the edge protection. Alternatively, a separate edge protection is used, which is glued to the transition from the end cap to the circumferential packaging.

[0006] The process of packaging paper rolls is expensive. It typically requires a separate packaging machine, or the rolls must be manually packaged on the shaft of a roll changer or its manufacturing machine, particularly a printing press, after the paper pulp is processed and then wound up. This requires additional staff. Furthermore, storage space and additional financial expenditure are needed due to the availability of individual packaging materials from suppliers. Summary of the Invention

[0007] Therefore, the object of the present invention is to improve the method of packaging paper rolls so that they can be carried out quickly, simply and cost-effectively, while still ensuring good and safe packaging of the paper rolls.

[0008] The present invention achieves the above objective by a method for producing circumferential packaging of paper rolls, wherein the paper roll has wound paper cores and two opposing end faces and a circumferential surface connecting the end faces to each other, wherein the method includes the following steps:

[0009] - Apply a liquid protective material to the end section of the paper pulp.

[0010] - The end section of the paper rib is wound around such that the end section forms at least one outer layer of the paper roll, and

[0011] - Harden the protective material to form a protective layer covering the circumferential surface.

[0012] The method according to the invention can be carried out, for example, in a production facility, particularly in a printing production line that produces paper rolls (i.e., processes and winds up paper fibers). For this purpose, preferably, only an additional coating tool is used, by which a protective material is applied in liquid form to the paper fibers, particularly to the end sections of the paper fibers. This can be, for example, an anilox roller with a trough, through which the protective material is drawn from the trough. To avoid over-coating, a scraper can be provided for removing excess protective material from the anilox roller. In this embodiment of the method, the protective material is preferably applied from the anilox roller to a coating roller, such as a rubber roller, which then applies the protective material to the end regions of the paper fibers. Alternatively, the coating tool is, for example, a printhead, such as a digital printing apparatus, a laminating tool, or a laminating device.

[0013] The protective material is applied in liquid form and preferably has protective properties, particularly hydrophobicity, in its hardened form. Waxes, resins, or plastics (such as polyurethane (PU) or polyethylene (PE)) are suitable as protective materials. The protective material can be colored or dyed to meet individual needs and preferences. The protective material can also be designed in different colors, allowing for the application of different colors of protective material, for example, at different locations on the end section. This opens up further possibilities for appearance design. This is particularly advantageous in protective materials applied to the end section that are externally visible after the protective material has hardened. Labels, barcodes, or QR codes can also be applied to this area using different colored protective materials. This is particularly easy to achieve when at least one coating tool is a digital printing tool. The amount of protective material applied is advantageously at least 3 g / m², preferably at least 5 g / m², particularly preferably at least 8 g / m², and at most 50 g / m², preferably at most 30 g / m², and particularly preferably at most 15 g / m².

[0014] The protective material can be applied to one side or both sides of the end section of the paper pulp, i.e., the top and bottom of the paper pulp. The desired amount and distribution of the applied protective material can be monitored by at least one sensor and electronic controller.

[0015] Because the protective material is applied directly to the paper roll in the coating tool, there is no need to reduce the production speed of production equipment (such as a printing line). This saves time. A separate printing tool can be installed downstream of the coating tool to print information, such as details about the contents of the paper roll, delivery location, or other information, onto the preferably hardened protective material. At least one coating tool can be a digital coating tool or an analog coating tool.

[0016] The application of the protective material is preferably monitored using at least one sensor, and more preferably using multiple sensors. The results are preferably used to detect and correct any deviation from the predetermined target coating amount. Furthermore, the monitoring results are preferably stored, particularly preferably electronically, so that in the event of future problems or claims, it can be traced whether sufficient protective material was used.

[0017] Advantageously, the length of the end section during paper winding is designed to be sufficient to form multiple outer layers of the paper roll, preferably at least three outer layers, particularly preferably at least five outer layers, and even more particularly preferably at least seven outer layers. The more outer layers the end section forms in the paper roll, the better the protection of the underlying paper. Preferably, the length of the end section is at least 3m, more preferably at least 5m, particularly preferably at least 8m, and a maximum of 100m, preferably a maximum of 40m, and particularly preferably a maximum of 20m. When the paper rib is wound on the shaft or the winding core (also understood as the shaft), one layer of wound paper is produced on the shaft for each revolution of the shaft. After, for example, 100 revolutions of the shaft, the paper rib has 100 layers on the shaft. Then, the 100 layers are stacked together.

[0018] Advantageously, a mark is applied to the pulp at the starting point of the end section. The mark can preferably be electronically processed after being automatically captured, for example, by optical capture with a camera. The electrical or electronic control unit of the device recognizes the mark and generates a control signal, which is used to control a coating tool for a protective material, such that the protective material can be applied to the end section of the pulp characterized by the mark.

[0019] Preferably, the protective material is hardened before the winding end section. For this purpose, the paper coated with the protective material is preferably guided by a drying or hardening device. Depending on the protective material, the coated paper can be irradiated with infrared light, UV radiation, heat, or other radiation to accelerate hardening. Within the scope of this invention, hardening is also understood as crosslinking or polymerizing the protective material. If the protective material is hardened before winding, the hardened protective material can be printed particularly easily.

[0020] Alternatively, the end sections are wound before the protective material is fully hardened, such that the protective material preferably connects the multiple outer layers of the paper pulp formed by the end sections to each other during the hardening process. This does not create multiple separate layers of protective material with hardened material, but rather the different layers of protective material are connected during the hardening, crosslinking, or polymerization process to form a single, thicker, and thus more secure protective layer.

[0021] The present invention also achieves the aforementioned objective through a method for producing end-face packaging of paper rolls, wherein the paper roll has paper fibers wound on a shaft and two opposing end faces and a circumferential surface connecting the end faces to each other, wherein the method comprises the following steps:

[0022] - Provide an end cap, the end cap comprising a base having an opening and a wing covering the opening,

[0023] - The end cap is arranged on the shaft such that the end cap abuts against the end face of the paper roll, and the shaft extends through the opening.

[0024] - Remove the paper roll from the shaft and

[0025] - Cover the opening with the wing.

[0026] When producing paper rolls, paper fibers, which can be several kilometers long, are wound onto a shaft. The shaft is mounted on at least one end face of the paper roll, preferably on both end faces. This allows for winding due to the large mass of the paper roll and the large forces generated by the high rotational speed during winding. However, in this case, it is impossible to wrap the entire end face of the paper roll because the shaft protrudes from the end face.

[0027] The method for producing end-face packaging according to the invention significantly simplifies production. End caps are used, for example, produced on a paper base, and preferably comprising cardboard coated, particularly with a waterproof coating. This coating can be made, for example, of polyurethane (PU) or polyethylene (PE). A flap can be understood as a planar element covering an opening in the end cap.

[0028] The end caps are preferably formed to be at least nearly circular, more preferably perfectly circular, and in the first embodiment have, for example, a stamped opening. Before the paper rib is wound, such an end face is inserted into the shaft through the opening by guiding the shaft around which the paper rib is to be wound. Preferably, two such end caps are inserted into the shaft, wherein the paper rib is wound between the two end caps to form a paper roll.

[0029] Alternatively, the end cap has a notch, the shape of which is different from a circle. The notch advantageously extends radially inward from the edge of the end cap. Particularly preferably, the notch extends through the center point of the circular cap.

[0030] In another embodiment, the opening is a hole through which the shaft can be inserted and connected to the edge of the end cap via a cut. The cut preferably replaces the notch.

[0031] Now push this end cap onto the shaft on which the paper roll is mounted until the shaft extends through the notch. For this purpose, for example, if the opening is a hole and the notch is merely a cut extending from the outer edge of the end cap to the hole, a portion of the end cap may have to be folded, stacked, or unfolded. The shaft particularly preferably passes through the center point of the end cap. In this state, most of the end face of the paper roll is covered and protected by the end cap. Due to the notch of the end cap, only a portion of the end face remains accessible from the outside and is therefore unprotected. After removing the paper roll from the shaft, the shaft no longer protrudes from the end face of the paper roll, and the remaining portion of the end face of the paper roll can be covered and protected. For this purpose, the notch of the end cap is covered by the flaps of the end cap.

[0032] In another embodiment, the cover has two half-covers arranged to form a hole between them, through which the shaft extends in its arranged state. Preferably, the half-covers are designed in the same manner such that every two half-covers can be assembled onto the base. Of course, half-covers with different designs that generally form the base can also be used.

[0033] The flaps of the end cap can be designed as separate elements and are preferably formed of the same material or a combination of the same materials as the rest of the end cap. The flaps are preferably slightly larger than the opening in the substrate of the end cap they cover, such that the edges of the flaps can be connected to the edges of the notch, for example, by bonding them to the edges of the notch.

[0034] Alternatively, the flap and the base are designed as a single piece. Preferably, the flap is attached to the base along a separation line on at least a portion of its circumference, the separation line preferably having a perforation, wherein the flap must preferably be separated from the base along the separation line before the end cap is pushed onto the shaft. In an advantageous embodiment, the separation line forms a boundary between the base and the flap, thereby forming an opening in the base.

[0035] The end cap can be provided as a single piece, wherein the flap and the base are preferably not yet separated along the separation line. In this state, the end cap has a preferred circular shape. If the end cap is now arranged on the shaft, the flap separates from the base along the separation line, which is particularly easy to achieve through a pre-existing perforation. This forms an opening, preferably a notch, into which the shaft can be inserted. It has proven particularly advantageous that the flap remains connected to the base of the end cap even after separation along the dividing line. Thus, in this case, the separation line does not extend around the entire circumference of the flap, but only along a portion of the circumference. The flap can then separate from the base of the end cap along the separation line and, for example, fold, where the fold line corresponds to the connection line between the base and the flap.

[0036] In this embodiment, after the paper roll is removed from the shaft, only the folded portion, i.e., the flap, must be folded again. Then, it is reconnected to the base of the end cap along the separation line, so that the opening is completely covered by the flap.

[0037] Advantageously, the flap has a first portion and a second portion, the first portion of the flap covering the first portion of the notch, and the second portion of the flap covering the second portion of the notch, wherein the first portion of the notch is covered by the first portion of the flap before the paper roll is removed from the shaft. The two portions of the flap are preferably adjacent to each other in the radial direction. The first portion is arranged radially outward, and the second portion is arranged radially inward. These two portions can preferably be separated from each other by a second separation line, which may also have perforations. In this embodiment, the flap is preferably separated from the base only along the first separation line before the end cap is pushed onto the shaft. After the end cap has been pushed onto the shaft, the second separation line between the two portions of the flap separates, and the radially outward first portion of the flap can be folded. Then, the first portion of the flap is preferably reattached to the base of the end cap along a portion of the first separation line (the portion of the first separation line extends along this portion of the flap), such that the first portion of the notch is covered, thereby protecting the covered portion of the paper roll. Thus, in this state, the end cap has a groove through which the shaft extends. After the paper roll is removed from the shaft, the second portion of the wing is also folded to cover the second portion of the notch.

[0038] Preferably, the width of the notch, i.e. its circumferential extension, corresponds at least to the diameter of the shaft.

[0039] Preferably, the substrate and the winglets are made of paper or cardboard material coated with a protective material.

[0040] The present invention also achieves the above objective by a method for producing packaging for paper rolls, wherein the paper roll has wound paper cores and two opposing end faces and a circumferential surface connecting the end faces to each other, wherein the method includes the following steps:

[0041] - Manufacture circumferential packaging according to the method described in this article.

[0042] - Manufacture at least one end-face package according to the method described herein, and

[0043] - Connect the at least one end face package to the circumferential package.

[0044] Preferably, two end-face wraps are produced for one of the two end faces of the paper roll. Both end-face wraps are connected to the circumferential wrap, thereby completely wrapping the paper roll and protecting it from external influences.

[0045] Preferably, the protective material used for the circumferential packaging and the protective material used for the end-face packaging are the same.

[0046] In an advantageous embodiment, at least one end cap, preferably all end caps, has a diameter larger than the diameter of the paper roll. In this case, a portion of the end cap is folded onto the circumferential wrapping to attach the end-face wrapping to the circumferential wrapping. This eliminates the need for separate edge protection elements and reduces equipment costs. Of course, additional edge protection elements can also be used to, for example, to more strongly protect the sensitive edges of the paper roll, particularly from external mechanical influences.

[0047] Therefore, preferably after the circumferential packaging is attached to the at least one end-face packaging, or in order to attach the circumferential packaging to the end-face packaging, an edge protection is applied along the edge of the paper roll, the circumferential surface abutting the end face along the edge. The second alternative is particularly advantageous if the diameter of the end-face packaging is not greater than or not sufficiently greater than the diameter of the paper roll.

[0048] The present invention also achieves the above objectives by means of an apparatus for performing the method described herein for producing circumferential packaging, an apparatus for performing the method described herein for producing end-face packaging, and / or an apparatus for performing the method described herein for producing paper roll packaging.

[0049] The working width of the digital printing equipment is preferably at least 1300 mm, more preferably at least 1900 mm, particularly preferably at least 2000 mm, and at most 2300 mm, preferably at most 2200 mm, and particularly preferably at most 2100 mm. When printing paper, the surface to be printed moves through the equipment at a speed preferably at least 80 m / min, more preferably at least 120 m / min, particularly preferably at least 130 m / min, and at most 270 m / min, preferably at most 150 m / min, and particularly preferably at most 140 m / min. If a primer is applied to the surface to be printed, the coating amount is preferably at least 1 g / m². 2 More preferably at least 2g / m 2 Particularly preferred is at least 3g / m 2 And at most 10g / m 2 Preferably, it is at most 6g / m 2 Particularly preferred is up to 4g / m 2 .

[0050] In a first specific embodiment, approximately 3 g / m² of CRYK water-based ink with an inline undercoat is applied to 65 g / m² of white decorative paper on a paper digital printing apparatus with a working width of 2070 mm and a speed of 135 m / min to create a wood-look decoration. The printing apparatus includes additional coating tools comprising a ceramic anilox roller, a trough, and a scooping mechanism. The coating tool uses a scraper with a strength of approximately 8 g / m². This coating tool is positioned along the production direction behind a drying unit where the coated digital print is dried by NIR radiation (NIR: near-infrared). The coating medium applied within the coating tool contains a PE component and a brown pigment. Orders are set to 10,000 linear meters. At the location of the paper core (corresponding to the 10,000th linear meter), a marking machine automatically sets a flag. This flag is mechanically recognized, thus activating an additional coating tool for applying the PE protective material without stopping the entire machine.

[0051] In this embodiment, the printed end section is 20m long and coated with a PE coating of approximately 8g / m², and dried in a drying unit before winding. Also in the drying unit, the protective material is irradiated with NIR radiation and dried therefrom. Furthermore, a small digital printing unit is used, arranged along the production direction behind the coating tool, to print packaging-related information, such as barcodes, multiple times on the protective material. After winding, a multi-layered, waterproof circumferential package is formed. Seven layers of packaging with a circumference of approximately 280cm are formed on a roll diameter of approximately 90cm. According to the prior art, the circumferential package has a unit area weight of approximately 220g / m². The package produced here has a unit area weight of approximately 511g / m², consisting of seven layers of paper coated with 8g / m², weighing 65g / m². Because the protective material contains brown pigment, the external color of the manufactured package is similar to that of conventional cardboard. Packaging-related information is preferably printed in black for easy identification. The roll diameter is measured to be 90cm using a laser. End caps with a diameter of 85cm and upward-folding wings are selected. The flaps are folded upwards, pushing the end caps onto the shaft. The first two flaps in the outer diameter region (i.e., radially outer) of the roll are further folded down, edge protection tape is applied, and the roll is sealed around the perimeter with waterproof tape. The roll is then removed from the roll changer. The second, still open portion of the corresponding flap in the axial region is then folded down and similarly sealed with waterproof tape.

[0052] The roll is then conveyed to the impregnation channel for further processing. The end sections coated with protective material, forming a circumferential wrapping, are used for securing (Einspannen) in the impregnation channel. This saves 20 meters of printed decorative paper.

[0053] In a second specific embodiment, a beige water-based ink is applied to 70 g / m² of decorative paper using a three-color coating roller on a gravure printing machine with a working width of 2070 mm and a speed of 300 m / min to create a wooden cover. After the third applied color dries, a coating tool is arranged in the printing machine. The coating tool includes a ceramic anilox roller, a trough, and a scraper with a scooping capacity of approximately 15 g / m². The applied protective material contains PE components. The production order is set to 17,000 m. At 17,000 m, a marking machine automatically sets a flag and performs mechanical identification. The coating tool is then automatically activated to apply the protective material without stopping the entire machine. The coated end section is 50 m long and coated with approximately 15 g / m² of protective material containing PE components. The protective material is then dried without a separate drying unit before winding, where the protective material is not completely dry. During winding, the layers crosslink or bond to each other to form a waterproof circumferential package. Thirteen layers of packaging are formed over a roll diameter of approximately 116 cm and a circumference of approximately 365 cm. Its unit area weight is approximately 1105 g / m², consisting of 13 layers of 70 g / m² paper and a surface coating of approximately 15 g / m².

[0054] Select an end cap with a diameter of 115 cm and upward-folding flaps. The flaps fold upwards as the end cap is pushed onto the shaft of the roll changer. The first radially outward-arranged portion of the flaps is further folded down, edge-protecting tape is applied, and it is then bonded with waterproof tape. The roll is then removed from the shaft. Subsequently, the second portion of the flaps, still open in the area of ​​the shaft, is folded down and bonded with waterproof tape. The roll is also conveyed to the impregnation channel for further processing, where the coated end areas of the paper core are used for fixation. This saves 40 meters of printed decorative paper.

[0055] In a third specific embodiment, approximately 4 g / m² of CRYK water-based ink with an inline undercoat is applied to 65 g / m² of white decorative paper on a paper digital printing apparatus with a working width of 2070 mm and a speed of 135 m / min to create a wood-look decoration. In the printing apparatus, digital coating tools are used to apply a large amount of protective material. These tools are arranged in the production direction behind the drying unit for the applied ink. The printheads of the coating tools have a resolution of 30 dpi. They extend across the entire working width. The coating side, where the protective material is applied, corresponds to the printing side. The protective material contains resin components and yellow pigment. The production order is set to 4000 meters. At the 4000-meter mark, a marker automatically sets a flag, which is mechanically recognized, and the coating tools are automatically activated to apply the protective material without stopping the entire apparatus. The coated end section is approximately 30 m long and coated with approximately 10 g / m² of protective material. The protective material is dried using an air drying unit before winding. A small digital printing device arranged in the production direction behind the coating tool prints packaging-related information and barcodes on the last meter of the end section of the protective material.

[0056] After winding, a multi-layered, waterproof, circumferential package is formed. A 16-layer package is formed with a roll diameter of approximately 58 cm and a circumference of approximately 182 cm. Its unit area weight is approximately 1200 g / m², consisting of 16 layers of 65 g / m² paper, coated with approximately 10 g / m². The roll diameter is manually measured at 58 cm. A 50 cm diameter end cap and an upward-folding flap are selected. The flap is folded upwards, pushing the end cap onto the shaft. The first portion of the flap is further folded down radially outwards, edge-protecting tape is applied, and it is sealed around the edges with waterproof tape. The roll is removed from the shaft. Then, the second portion of the flap is folded down and similarly sealed with waterproof tape. The roll is also conveyed to an impregnation channel for further processing, where the coated end areas of the paper cores are used for fixation. This saves 30 m of printed decorative paper. Attached Figure Description

[0057] Several embodiments of the present invention will now be explained in more detail with the aid of the accompanying drawings. As shown in the drawings,

[0058] Figure 1 A schematic diagram of an apparatus for manufacturing circumferential packaging is shown.

[0059] Figure 2 A schematic cross-sectional view of a paper roll according to an embodiment of the present invention is shown.

[0060] Figure 3 A schematic cross-sectional view of a paper roll according to another embodiment of the present invention is shown.

[0061] Figures 4 to 9The diagram illustrates different steps in the end-face packaging manufacturing process.

[0062] Figure 10 A schematic diagram of the end cap is shown.

[0063] Figure 11 A schematic diagram of the other end cap is shown, and

[0064] Figure 12 A schematic diagram showing the edge of the end cap. Detailed Implementation

[0065] Figure 1 A portion of an apparatus for manufacturing circumferential packaging according to a first embodiment of the invention is schematically shown. Paper pulp 2 passes through a drying device 4, in which a coating applied to the paper pulp 2 is dried, for example. The paper pulp 2 then passes through a coating device 6 having a trough 8 in which a protective material 10 is located. An anilox roller 12 scoops the protective material 10 from the trough 8. A scraper 14 peels excess protective material 10 from the anilox roller 12. The protective material 10 is transferred from the anilox roller 12 to a coating roller 16, through which it is applied to the paper pulp 2. In the illustrated embodiment, the paper pulp 2, together with the protective material 10, passes through a second drying device 18, in which the protective material 10 is dried before the treated paper pulp 2 is wound onto the shaft 20 of a roll changer. The coating of the protective material 10 is monitored by a sensor 22 connected to an electronic control device 24.

[0066] Figure 2 The illustration schematically shows how the paper pulp 2, coated with protective material 10, is wound onto shaft 20. A white area is visible radially inward, through which the majority of the paper pulp 2, uncoated with protective material 10, is wound. Figure 2 In the illustrated embodiment, the protective material 10 is fully hardened before the end section of the paper rib 2 coated with the protective material 10 is wound. Therefore, as... Figure 2 The paper shown is a seven-layer paper coated with protective material 10 that forms the paper rib 2.

[0067] Figure 3 Another embodiment is shown. Here, protective material 10 is also coated onto the paper pulp 2. However, it is not yet completely dry, so that the different layers of paper pulp 2 coated with protective material 10 and now wound together are connected to a single protective layer, because the different layers of protective material 10 are connected to each other. Therefore, with Figure 2 Compared to simply forming a protective layer, Figure 2 Seven separate protective layers were formed.

[0068] Figures 4 to 9 The illustrations show the different stages of a method for producing end-section packaging. Figure 4End cap 26 is shown. The end cap has a base 28, which is designed as a single piece with the flap 30. A first separation line 32 extends on a portion of the circumference of the flap 30, and the first separation line is designed as a perforation. A fold line 34 extends on a second portion of the circumference of the flap 30. Figure 4 The wing 30 in the illustrated embodiment has a first portion 36 and a second portion 38, which are separated from each other by a second separation line 40.

[0069] Figure 5 As shown, the flap 30 separates from the base 28 of the end cap 26 along the first separation line 32 and folds upward along the fold line 34. This forms a notch 42, allowing the end cap 26 to be pushed onto the shaft 20. In the embodiment shown in this method step, the second separation line 40 is still intact, and the two portions 36, 38 of the flap 30 have not yet separated from each other.

[0070] This is Figure 6 The process was modified. The first portion 36 and the second portion 38 of the flap 30 are separated from each other along the second separation line 40. The first portion 36 of the flap 30 is then folded so that only the opening 44 through which the shaft 20 passes remains open. The first portion 36 of the flap 30 is then bonded to the base 28 of the end cap 26.

[0071] Then as Figure 7 As shown, remove the part with the shaft 20 Figure 7 The paper roll with end cap 26 shown. According to Figure 8 Subsequently, the second part 38 of the wing 30 is also folded downwards, and the opening 44 is closed as the second part of the notch 42. Figure 9 The fully enclosed end-face packaging is shown, with the first portion 36 and the second portion 38 of the flap 30 both bonded to the base 28 of the end cap 26.

[0072] Figure 10 Another embodiment of the end cap 26 is illustrated schematically. The opening 44 is designed as a sufficiently large orifice to accommodate... Figure 10 Shaft 20 (not shown). To enable the end cap 26 to be pushed onto the shaft 20, the end cap 26 has a cutout 46 extending from its outer edge 48 to the opening 44. The end cap 26 is made of a flexible material design, eliminating the need for fold lines to fold the end cap 26 upwards along the cutout 46 and push it onto the shaft.

[0073] Figure 11The base 28 of the end cap 26 is shown. The base 28 consists of two half-caps 50. An opening 44 is located at the center of the base, and a shaft 20 (not shown) extends through this opening when the end cap 26 is in the applied state. A cut 46 is located between the two half-caps 50, extending from the central opening 44 to the outer edge 48 of the base 28 of the end cap 26. Figure 11 In the illustrated embodiment, the two half-caps 50 are designed to be identical. This is advantageous, but not necessary. The two cutouts 46 do not necessarily have to be opposite each other and arranged symmetrically with respect to the center of the opening 44.

[0074] Figure 12 The base 28 of the end cap 26 is shown schematically, with specific embodiments of the base 28 omitted from the illustration. Figure 12 The outer edge 48 of the base 28 is shown, on which an edge protection 52 is provided. In the illustrated embodiment, the edge protection has a retaining ring 54 by which the edge protection 52 is secured to the base 28 of the end cap 26, for example by adhesion. The edge protection 52 has a plurality of folding flaps 56, which are equidistantly distributed circumferentially in the illustrated embodiment. This is advantageous, but not necessary. Irregular arrangements of the folding flaps 56 are also possible. They protrude beyond the outer edge 48 of the base 28 and serve to connect the end face package reached by the end cap 26 to the circumferential package. For this purpose, the folding flaps 56 are folded and secured to the circumferential package, for example by adhesion.

[0075] List of reference numerals

[0076] 2 paper ribs

[0077] 4. Drying device

[0078] 6 Coating Device

[0079] 8-bucket trough

[0080] 10 Protective Materials

[0081] 12 anilox rollers

[0082] 14 scrapers

[0083] 16 coating rollers

[0084] 18 Drying Unit

[0085] 20-axis

[0086] 22 sensors

[0087] 24 electronic control devices

[0088] 26 end caps

[0089] 28 matrix

[0090] 30 winglets

[0091] 32 First Separation Line

[0092] 34 fold lines

[0093] 36 Part 1

[0094] 38 Part Two

[0095] 40 Second Separation Line

[0096] 42 notch

[0097] 44 openings

[0098] 46 incisions

[0099] 48 outer edge

[0100] 50 half cap

[0101] 52 Edge Protection

[0102] 54 fixed ring

[0103] 56 Folding winglets.

Claims

1. A method for producing end-face packaging of a paper roll, wherein the paper roll has wound paper cores (2) and two opposing end faces and a circumferential surface connecting the end faces to each other, wherein the method comprises the following steps: - Provide an end cap (26) having a base (28) with an opening (44) and a flap (30) for covering the opening (44), wherein the base (28) and the flap (30) are preferably designed as a single piece. - The end cap (26) is arranged on the shaft (20) such that the end cap (26) abuts against the end face of the paper roll, and the opening (44) extends through the shaft (20). - Remove the paper roll from the shaft (20), and -The opening (44) is covered by the wing (30).

2. The method according to claim 1, characterized in that, The end cap (26) is inserted into the shaft (20) before the paper rib (2) is wound.

3. The method according to claim 1, characterized in that, The opening (44) is a notch (42), and the end cap (26) is pushed onto the shaft (20).

4. The method according to any one of claims 1 to 3, characterized in that, The blade (30) is connected to the base (28) along a separation line on at least a portion of its circumference, the separation line preferably having a perforation, wherein the blade (30) preferably must be separated from the base (28) along the separation line before the end cap (26) is pushed onto the shaft (20).

5. The method according to claim 3, characterized in that, The wing (30) has a first portion and a second portion, the first portion of the wing being used to cover the first portion of the notch (42), and the second portion of the wing being used to cover the second portion of the notch (42), wherein the first portion of the wing (30) covers the first portion of the notch (42) before the paper roll is removed from the shaft (20).

6. The method according to claim 1, characterized in that, The substrate (28) and the wing (30) are made of paper or cardboard material coated with a protective material (10).

7. A method for producing packaging for paper rolls, wherein the paper roll has wound paper cores (2) and two end faces opposite each other and a circumferential surface connecting the end faces to each other, wherein the method comprises the following steps: -Manufacturing circumferential packaging - Manufacture at least one end-face package according to the method of any one of claims 1 to 6. - Connect the at least one end face package to the circumferential package.

8. The method according to claim 7, characterized in that, Two end-face packages are produced for one of the two end faces of the paper roll.

9. The method according to claim 7 or 8, characterized in that, The protective material (10) used for the circumferential packaging and the protective material (10) used for the at least one end face packaging are the same.

10. The method according to claim 7, characterized in that, At least one end cap (26) has a diameter greater than that of the paper roll, and a portion of the end cap (26) is folded onto the circumferential package to connect the end face package to the circumferential package.

11. The method according to claim 7, characterized in that, After the circumferential packaging is attached to the at least one end-face packaging, or in order to attach the circumferential packaging to the end-face packaging, edge protection is applied along the edge of the paper roll, with the circumferential surface adjacent to the end face along the edge.

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