Method for producing a packaging

Abstract

The disclosure relates to a method for producing a circumferential packaging for a paper roll. The paper roll has a wound paper web and two opposing end faces and a circumferential surface that connected the end faces to each other. The method includes the following steps: applying a protective material in liquid form to an end section of the paper web by at least one application unit, the protective material being applied to one of two sides of the end section of the paper web, winding up the end section of the paper web, so that the end section forms at least one outer layer of the paper roll, and curing the protective material, resulting in a protective layer that covers the circumferential surface.

Claims

1. A method for producing a circumferential packaging for a paper roll, the circumferential packaging and paper roll is formed from a single paper web, the paper roll having two opposing end faces and a circumferential surface that connects the end faces to each other, the method comprising the steps: applying a protective material in liquid form to an end section of the paper web by at least one application unit, the protective material being applied to one or two sides of the end section of the single paper web, winding up the end section of the single paper web so that the end section with the protective material forms at least one outer layer of the paper roll, and curing the protective material after the winding up thereby creating a single protective layer that covers the circumferential surface of the single paper roll.

2. The method according to claim 1, wherein the end section forms multiple outer layers of the paper roll when it is wound up to at least three outer layers.

3. The method according to claim 1, wherein the end section is wound up while the protective material is not yet fully cured, so that the protective material connects several outer layers of the single paper roll formed by the end section during curing.

4. The method according to claim 1, wherein the end section is so long that it forms multiple outer layers of the single paper roll when it is wound up to at least five outer layers.

5. The method according to claim 1, wherein the end section is so long that it forms multiple outer layers of the single paper roll when it is wound up to at least seven outer layers.

6. The method of claim 1, wherein the applying the protective material is applied to only to the end section of the single paper web.

7. The method of claim 6, wherein the end section of the paper web is at least three outer layers, wherein each of the outer layers represents one revolution of the single paper web.

8. The method of claim 1, wherein a mark is applied to the single paper web that forms a start of the end section such that once the mark has been detected, a control signal is generated such that the protective material is applied to the end section of the single paper web starting at the mark.

9. A method for producing an end side packaging for a paper roll, the paper roll having a wound paper web and two opposing end faces and a circumferential surface that connects the end faces to each other, the method comprising the following steps: providing an end cover that comprises a base body with an opening and a tab for covering the opening, the base body and the tab being designed as a single piece, arranging the end cover on a shaft in such a way that the end cover rests on an end side of the paper roll and the shaft extends through the opening, removing the paper roll from the shaft, and covering the opening with the tab.

10. The method according to claim 9, wherein the end cover is put on the shaft before the paper web is rolled up.

11. The method according to claim 9, wherein the opening is an indentation and the end cover is slid onto the shaft.

12. The method according to claim 11, wherein the tab has a first part for covering a first part of the indentation and a second part for covering a second part of the indentation, the first part of the indentation being covered by the first part of the tab before the paper roll is removed from the shaft.

13. The method according to claim 9, wherein the tab is connected to the base body across at least part of its circumference along a parting line, which has a perforation, wherein the tab has to be separated from the base body along the parting line before the end cover is slid onto the shaft.

14. The method according to claim 9, wherein the base body and the tab are produced from a paper material or cardboard material coated with a protective material.

15. A method for producing a packaging for a paper roll, the paper roll having a wound paper web and two opposing end faces and a circumferential surface that connects the end faces to each other, the method comprising the following steps: producing a circumferential packaging comprising: applying a protective material in liquid form to an end section of the paper web by means of at least one application unit, the protective material being applied to one or two sides of the end section of the paper web, winding up the end section of the paper web so that the end section forms at least one outer layer of the paper roll, and curing the protective material thereby creating a protective layer that covers the circumferential surface, producing an end side packaging comprising: providing an end cover that comprises a base body with an opening and a tab for covering the opening, the base body and the tab being designed as a single piece, arranging the end cover on a shaft in such a way that the end cover rests on an end side of the paper roll and the shaft extends through the opening, removing the paper roll from the shaft, and covering the opening with the tab, and connecting the at least one end side packaging to the circumferential packaging.

16. The method according to claim 15, wherein two end side packagings are produced for one of the two end sides of the paper roll in each case.

17. The method according to claim 15, wherein the protective material for the circumferential packaging and the protective material for the at least one end side packaging are identical.

18. The method according to claim 15, wherein a diameter of at least one end cover is greater than the diameter of the paper roll and part of the end cover is turned down to connect the end side packaging to the circumferential packaging.

19. The method according to claim 15, wherein an edge protector is applied along the edges of the paper roll along which the circumferential surface adjoins the end sides after the circumferential packaging has been connected to the at least one end side packaging or to connect the circumferential packaging to the end side packaging.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, a number of embodiment examples of the invention will be explained in more detail with the aid of the accompanying figures. They show

(2) FIG. 1the schematic representation of a device for producing a circumferential packaging,

(3) FIG. 2the schematic sectional view through a paper roll according to an embodiment example of the present invention,

(4) FIG. 3the schematic sectional view through a paper roll according to a further embodiment example of the present invention,

(5) FIGS. 4 to 9schematic representations of different steps in the method for producing an end side packaging,

(6) FIG. 10the schematic representation of an end cover,

(7) FIG. 11the schematic representation of a further end cover and

(8) FIG. 12the schematic representation of the edge of an end cover.

DETAILED DESCRIPTION OF INVENTION

(9) FIG. 1 schematically depicts part of a device for producing a circumferential packaging according to a first embodiment example of the present invention. A paper web 2 passes through a drying facility 4 in which, for example, a color application applied to the paper web 2 is dried. The paper web 2 subsequently passes through an application device 6 that comprises a scooping tray 8 containing a protective material 10. An anilox roller 12 scoops protective material 10 out of the scooping tray 8. A scraper 14 removes excess protective material 10 from the anilox roller 12. The anilox roller 12 transfers the protective material 10 to an application roller 16, which applies it to the paper web 2. In the embodiment example shown, the paper web 2 with the protective material 10 passes through a second drying facility 18 in which the protective material 10 is dried before the paper web 2 processed in this way is wound onto a shaft 20 of a roll winder. The application of the protective material 10 is monitored via sensors 22 connected to an electronic control unit 24.

(10) FIG. 2 schematically shows how the material of the paper web 2 coated with the protective material 10 is wound onto the shaft 20. Radially inwards is a white area by which it is represented that a large part of the paper web 2 is already wound up, which has not been coated with the protective material 10. In the embodiment example shown in FIG. 2 the protective material 10 is completely cured before the end area of the paper web 2, which was coated with the protective material 10, is wound up. As depicted in FIG. 2, this results in seven separate layers of paper of the paper web 2 that are coated with the protective material 10.

(11) FIG. 3 depicts another embodiment. In this case too, the protective material 10 has been applied to the paper web 2. However, it has not been completely dried, so that the various layers of the paper web 2 that were coated with the protective material 10 and are now wound up are bonded to create a single protective layer, as the protective material 10 of the different layers bonds together. Unlike in FIG. 2, this results in a single protective layer, while in FIG. 2 seven separate protective layers are created.

(12) FIGS. 4 to 9 schematically depict different phases of a method in which an end side packaging is to be produced. FIG. 4 shows an end cover 26. It has a base body 28 designed as a single piece with a tab 30. A first parting line 32, designed as a perforation, extends across part of the circumference of the tab 30. A folding line 34 extends across a second part of the circumference of the tab 30. In the embodiment example shown in FIG. 4, the tab 30 has a first part 36 and a second part 38, which are separated from each other by a second parting line 40.

(13) FIG. 5 shows that the tab 30 has been separated from the base body 28 of the end cover 26 along the first parting line 32 and folded upwards along the folding line 34. An indentation 42 forms, so that the end cover 26 can be slid onto the shaft 20. In the embodiment example shown, the second parting line 40 is intact in this step of the method and the two parts 36, 38 of the tab 30 have not yet been separated from each other.

(14) This changes in FIG. 6. The first part 36 and the second part 38 of the tab 30 are separated from each other along the second parting line 40. The first part 36 of the tab 30 is then turned down, so that only one opening 44 remains open, through which the shaft 20 extends. The first part 36 of the tab 30 is bonded to the base body 28 of the end cover 26.

(15) As shown in FIG. 7, the paper roll with the paper cover 26 depicted in FIG. 7 is then removed from the shaft 20. According to FIG. 8, the second part 38 of the tab is then also folded downwards and the opening 44 as the second part of the indentation 42 closed. FIG. 9 depicts the completely closed end side packaging in which both the first part 36 and the second part 38 of the tab 30 are bonded to the base body 28 of the end cover 26.

(16) FIG. 10 schematically shows a further embodiment of an end cover 26. The opening 44 is designed in the form of a hole that is large enough to accommodate the shaft 20, which is not shown in FIG. 10. To be able to slide the end cover 26 onto the shaft 20, the end cover 26 features a cut 46 that extends from the outer edge 48 of the end cover 26 to the opening 44. The material of the end cover 26 is designed to be so flexible that it does not require a folding line in order to unfold the end cover 26 along the cut 46 and slide it onto the shaft.

(17) FIG. 11 shows the base body 28 of an end cover 26. The base body 28 comprises two cover halves 50. In the middle of them is the opening 44, through which the shaft 20, not depicted, extends when the end cover 26 is in the mounted state. The cut 46 is located between the two cover halves 50, said cut now extending from the central opening 44 to the outer edge 48 of the base body 28 of the end cover 26. In the embodiment example shown in FIG. 11, the two cover halves 50 are designed to be identical. This is advantageous, but not essential. The two cuts 46 do not necessarily have to be opposite each other and symmetrical to the center of the opening 44.

(18) FIG. 12 schematically depicts a base body 28 of an end cover 26, the representation of the specific design of the base body 28 having been omitted. FIG. 12 illustrates the outer edge 48 of the base body 28, on which an edge protector 52 is located. In the embodiment example shown, it features a fastening ring 54 by which the edge protector 52 is fixed, for example stuck, to the base body 28 of the end cover 26. The edge protector 52 has a plurality of folding tabs 56, which are distributed equidistantly across the circumference in the embodiment example shown. This is advantageous, but not essential. An irregular arrangement of the folding tabs 56 is also possible. They project beyond the outer edge 48 of the base body 28 and are used to connect the end side packaging, achieved through the end cover 26, to a circumferential packaging. To this end, the folding tabs 56 are turned down and fixed, for example stuck, to the circumferential packaging.