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(11) | EP 3 067 174 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | METHOD OF LABELLING A FOOD WRAP ROLL, PERFORATION DEVICE OF THE LABELLING MACHINE AND LABEL OF THE FOOD WRAP ROLL |
| (57) The method of labelling the food wrap roll consists in unwinding the label in the
form of a ribbon (1) from the unwinding roller (2) and feeding it to the tensioning
and perforating roller (3), which is located beneath the unwinding roller (2), the
roller (3) featuring at least one bushing tube (11) with the needles (12) and puncturing
perforation holes (15) along the label ribbon (1), and the label ribbon (1) is fed
through a set of guide rollers (4), wound on the rolled up food wrap roll (5) and
cut off crosswise. The perforation device of the labelling machine comprises the rollers (16) with bearings, mounted pivotally on the axle (13), and at least one bushing tube (11) mounted coaxially in between, with the needles (12) attached on the outer circumference and projecting out the circumference of the rollers (16), wherein the axle (13) mounted on the holders (19), attached to the frame of the labelling machine (17), is detachable. The label wound on the food wrap roll, characterised in that it features at least one row of perforation holes (15). |
Technical Field
[0001] The present invention relates to the method of labelling food wrap rolls, for example aluminium film rolls. The present invention also relates to the perforation device of the food wrap roll labelling machine and the food wrap roll label produced according to the invention and using the device according to the invention.
Background Art
[0002] Methods of perforation of material sheets are known, which consist in feeding such sheets between perforating rollers featuring needles on the entire roller circumference.
[0003] A solution disclosed in Chinese application CN201932394 (U) is known, wherein a "multi-layer staggered punching device" is used for the perforation of multi-layer sheets of paper. The device comprises pairs of needle rollers and supporting rubber rollers arranged vertically, one above the other, which allows simultaneous perforation of several layers of paper sheets. The needle rollers comprise needles on the entire roller surface.
[0004] Perforation knives are also known, which have the form of rings with perforating pins, used to perforate film or paper sheets or ribbons. The knives are positioned between subsequent guide rollers.
Summary of invention
[0005] The essence of the invention is the method of labelling the food wrap roll, which consists in machine-made wrapping of the product in the form of a rolled up food wrap roll in a transparent or pre-printed film label, wherein the label in the form of a ribbon is unwound from the unwinding roller and fed to the perforating roller featuring at least one bushing tube with needles. The perforating roller punctures perforation holes along the label ribbon. Next, the label ribbon is fed through a set of guide rollers, wound on the rolled up food wrap roll and cut off crosswise.
[0006] The heat-shrinkable film wound on the food wrap roll, once cut off, is preferably shrunk on the sides by supplying hot air from heat sealers.
[0007] The label ribbon is preferably punctured along a single row, making holes the diameter of which is 1 mm.
[0009] The essence of the invention is also the perforation device of the labelling machine comprising rollers with bearings, mounted pivotally on an axle, and at least one bushing tube, which is coaxially mounted in between, with needles attached on the outer circumference and projecting out the circumference of the rollers. The axle, which is detachable, is mounted on holders attached to the frame of the labelling machine.
[0010] A metal ring shall preferably be placed inside the bushing tube, fitted tightly beneath the inner tips of the needles, and the sides of the bushing tube are fitted tightly inside the rollers. The bearings through which the axle passes, together with the casing, enclose the sides of the perforating roller.
[0011] The essence of the invention is also the label wound on the food wrap roll, which comprises at least one row of perforation holes.
[0014] The label is preferably made of heat-shrinkable film, whereas its edges are shrunk by heat around the sides of the food wrap roll.
[0015] An advantage of the method according to the invention is that perforation of the label can be performed on an existing labelling process line by addition of one stage, using simple measures, i.e. addition or replacement of the existing tensioning roller with a roller comprising a bushing tube with a row of needles. Another advantage of the invention is that the device according to the invention in the form of the perforating roller features a simple design, and it can be incorporated in existing labelling machines. In addition, the device is easy to operate.
[0016] An advantage of the label according to the invention is that it can be easily and quickly removed from the food wrap roll by tearing it off along the perforation line.
Technical Problem
[0017] The object of the invention is to obtain a label wrapping the aluminium film roll, which allows its quick and easy removal, and to devise a method for longitudinal perforation of the pre-printed label ribbon used for wrapping film wrap rolls using existing labelling devices without the perforation function. The object of the invention is also to design a device for longitudinal perforation of the label ribbon, the device which can be installed on known and already existing process lines.
Brief description of drawings
[0018] An application example of the manner according to the invention, the device according to the invention and the product according to the invention are presented in the figures, where:
Fig. 1 shows a labelling machine with subsequent stages of label production
Fig. 2 shows a view on the perforating roller of the device
Fig. 3 shows a cross-section of the perforating roller
Fig. 4 shows a view on the bushing tube with perforating needles
Fig. 5 shows a cross-section of the bushing tube with perforating needles
Fig. 6 shows how the perforating roller is attached to the frame of the labelling machine
Figs. 7 and 8 show the product in the form of a label with one row of perforation holes, applied on the food wrap roll.
Description of embodiments
[0019] Embodiment 1. Labelling of the food wrap roll consists in machine-made wrapping of the product in the form of rolled up food wrap roll in a transparent or pre-printed film-made label. The pre-printed label in the form of the ribbon 1 is unwound from the unwinding roller 2 and fed to the tensioning and perforating roller 3 located beneath the unwinding roller 2, the roller 3 featuring a bushing tube 11 with needles 12 located in the centre. Along the centre of the continuous band of the label ribbon 1, there is one row of needles 12 of the perforating roller 3, spaced every 1 mm, which punctures perforation holes 15 having a diameter of 1 mm. Next, the label ribbon 1 is fed through a set of guide rollers 4, wound on the rolled up food wrap roll 5 and cut off crosswise using the cutter 6. The food wrap rolls 5, 7, 8 are fed to the perforation machine 17 using a system of transfer rollers 10.
[0020] Embodiment 2. In another embodiment the procedure is as in the first embodiment, but the heat-shrinkable label 18 is used, which, once cut off, is shrunk on the sides 14 by supplying hot air from heat sealers 9.
[0021] Embodiment 3. In yet another embodiment of the labelling application according to the invention the procedure is as in the first or second embodiment, but the perforating roller 3 features a bushing tube 11 with needles 12, the bushing tube located on its side, and therefore the label 18 features perforation holes 15 accordingly to its design, located on the side, at a distance of 7 cm from the roll edge.
[0022] Embodiment 4. According to the invention, the perforation device of the labelling machine 17 features two rollers 16 in the form of hollow cylinders, mounted pivotally on the axle 13 using two bearings 22 located at the outer ends. The bearings 22 are located in the casing 23 which encloses the outer ends of the rollers 16. The axle 13 features spacers 21 which prevent displacement of the perforating roller 3. Inner ends of the rollers 16 are tightly fitted on the bushing tube 11 which is coaxial relative to the same. The bushing tube 11 features a 2 mm high flange 23 with holes, having a 1 mm cross section and drilled every 1 mm, featuring 40 needles 12, having a diameter of 1 mm and a length of 10 mm, mounted permanently using adhesive. The needles 12 project out the outer circumference of the flange 23. Inside the bushing tube 11 and below the flange 24, there is a ring 20, the width of which is equal to the width of the flange 24, which locks driving the needles 12 inwards the bushing tube 11. Once connected with the rollers 16, the outer circumference of the flange 23 is faced with the outer circumference of the rollers 16. The needles 12 project out the circumference of the rollers 16 and the flange 23. The axle 13, which is detachable, is mounted on metal holders 19 attached to the frame of the labelling machine 17 using screws. In this embodiment, the working length of the perforating roller 3 is 400 mm and the axle length is 530 mm. The outer diameter of the roller is 50 mm.
[0023] Embodiment 5. The label 18, which is wound on the food wrap roll 7, is made of pre-printed film and features one row of perforation holes 15 located in the centre. The holes 15 have a diameter of approximately 1 mm and are spaced every 1 mm.
[0024] Embodiment 6. The label 18, which is wound on the food wrap roll 7, is made of pre-printed film and features one row of perforation holes 15 located on the side, at a distance of 70 mm from the roll side. The holes 15 have a diameter of approximately 1 mm and are spaced every 1 mm.
[0025] Embodiment 7. The label 18, which is wound on the food wrap roll 8, is made of pre-printed heat-shrinkable film and features one row of perforation holes 15 located in the centre. The holes 15 have a diameter of approximately 1 mm and are spaced every 1 mm. The outer edges of the label 14 are shrunk around the sides of the food wrap roll 8 by heat.
[0026] Embodiment 8. The label 18, which is wound on the food wrap roll 8, is made of pre-printed heat-shrinkable film and features one row of perforation holes 15 located on the side, at a distance of 70 mm from the roll side. The holes 15 have a diameter of approximately 1 mm and are spaced every 1 mm. The outer edges of the label 14 are shrunk around the sides of the food wrap roll 8 by heat.
[0027] The labels 18 described within embodiments 5-8 are removed from the food wrap rolls 7 or 8 by tearing them off along the perforation line 15.
Reference signs list
[0028]
1. Label ribbon
2. Unwinding roller
3. Perforating roller
4. Guide rollers
5. Food wrap roll
6. Cutter
7. Food wrap roll wrapped in the label
8. Food wrap roll wrapped in the label with sealed sides
9. Heat sealer
10. Transfer rollers
11. Bushing tube
12. Needles
13. Axle
14. Heat-shrinkable film edges
15. Perforation holes
16. Roller
17. Labelling machine
18. Label
19. Holder
20. Ring
21. Spacers
22. Bearing
23. Casing
24. Bushing tube flange
1. The method of labelling the food wrap roll, which consists in machine-made wrapping
of the product in the form of the rolled up food wrap roll in a transparent or pre-printed
film label, characterised in that the label in the form of the ribbon (1) is unwound from the unwinding roller (2)
and fed to the tensioning and perforating roller (3) featuring at least one bushing
tube (11) with needles (12), which punctures perforation holes (15) along the label
ribbon (1), and the label ribbon (1) is fed through a set of guide rollers (4), wound
on the rolled up food wrap roll (5) and cut off crosswise.
2. The method of labelling according to claim 1, characterised in that, once cut off, the heat-shrinkable film label wound on the food wrap roll is shrunk
on the sides by supplying hot air from heat sealers.
3. The method of labelling according to any of claims 1-2, characterised in that the label ribbon is perforated along a single row, making holes the diameter of which
is 1 mm.
4. The method of labelling according to any of claims 1-3, characterised in that the perforation holes (15) are made in the centre of the label ribbon.
5. The perforation device of the labelling machine, characterised in that it features rollers (16) with bearings, mounted pivotally on the axle (13), and at
least one bushing tube (11) mounted coaxially in between, with the needles (12) attached
on the outer circumference and projecting out the circumference of the rollers (16),
wherein the axle (13) mounted on the holders (11), attached to the frame of the labelling
machine (17), is detachable.
6. The device according to claim 5, characterised in that, inside the bushing tube (11) there is a metal ring (20) fitted tightly beneath the
inner tips of the needles (12), the sides of the bushing tube (11) are fitted tightly
inside the rollers (16), and the bearings (22), through which the axle (13) passes,
together with the casing (23), enclose the sides of the perforating roller (3).
7. The label wound on the food wrap roll, characterised in that it features at least one row of perforation holes (15).
8. The label according to claim 7, characterised in that the row of perforation holes (15) is located in the centre of the label.
9. The label according to claim 8, characterised in that the row of perforation holes (15) is located on the side of the label.
10. The label according to any of claims 7-9, characterised in that it is made of heat-shrinkable film, wherein its edges (14) are shrunk around the
sides of the food wrap roll (8) by heat.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description