EP3988217A1 - A moistening system for paper sheets - Google Patents
A moistening system for paper sheets Download PDFInfo
- Publication number
- EP3988217A1 EP3988217A1 EP21200875.9A EP21200875A EP3988217A1 EP 3988217 A1 EP3988217 A1 EP 3988217A1 EP 21200875 A EP21200875 A EP 21200875A EP 3988217 A1 EP3988217 A1 EP 3988217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- unit
- nozzles
- plate
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000123 paper Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000009423 ventilation Methods 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 15
- 238000004026 adhesive bonding Methods 0.000 claims description 9
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0884—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being aligned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
- B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
- B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
- B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
- B31F1/2818—Glue application specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
- B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
- B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
- B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
- B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
- B31F1/2872—Spraying devices, e.g. for moistening purposes; Lubricating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
Definitions
- the present invention relates to a moistening system for paper sheets, specifically applied to machines for making corrugated cardboard.
- Machines for making multi-layer cardboard, such as corrugated cardboard conventionally comprise systems for unwinding paper from special reels, systems for corrugating the intermediate layer(s) and systems for coupling and gluing the various layers.
- a conventional structure of corrugated cardboard provides two layers of corrugated paper separated by a flat sheet and closed on the two outer sides by flat sheets of paper called covers.
- Such bars may be arranged above, below, or in certain cases, also beside the paper strip unwound from the reel, but when the bars in particular are arranged above the paper - which is the most convenient and widespread circumstance - condensation is created on the lower surface thereof which tends to drip onto the underlying paper, thus inducing actual wetting in the contact point.
- Such a wetting is detrimental for the quality results of the corrugated cardboard production method. Indeed thereby, instead of being homogeneously moistened, the paper has uneven areas in which it may be soaked in water.
- the problem at the basis of the present invention therefore is providing a moistening system for paper in cardboard making machines which overcomes the drawbacks of the prior art.
- the object of the present invention is a moistening system for paper sheets or strips in a cardboard making machine, comprising a frame which supports a plurality of nozzles for spraying water, comprising a micro-perforated plate comprising holes for distributing atomized water and micro-holes for dispensing a ventilation air flow.
- Another object of the invention is a corrugated cardboard making machine comprising one or more moistening systems as defined above.
- the corrugated cardboard making machine indicated as a whole by numeral 1, comprises, in the order from left to right, that is according to the processing line indicated by the horizontal arrow I, the following working units:
- the moistening system 100 may be placed at one or more of the down arrows shown in Figure 1 according to the requirements of the system, the will of the user and the moistening level required in the various production steps.
- the moistening system 100 may be placed:
- the moistening system 100 comprises a frame 8 that supports a plurality of spray nozzles 9 configured to dispense a mixture of water and air, a plate 10 that supports a plurality of ventilation nozzles 11 configured to dispense air, and a micro-perforated plate 12 comprising holes 19 for distributing atomized water over a paper sheet or strip (which is, for example positioned at a predefined distance below system 100) and micro-holes 20 for dispensing a ventilation air flow, in which plate 10 is sandwiched between frame 8 and the micro-perforated plate 12.
- Frame 8 comprises a nozzle-holder bar 13 and two lateral closing sides 14a, 14b.
- a first and a second series of spray nozzles 9 are arranged on opposite sides of the nozzle-holder bar 13.
- the nozzles 9 of the two series are placed in staggered positions so as to optimize the distribution of the atomized water over the surface of the paper sheet or strip.
- Plate 10 comprises a plurality of openings 10a for housing the spray nozzles 9 and a plurality of holes 10b for housing the ventilation nozzles 11.
- Plate 10 further comprises peripheral sides 22 on which the micro-perforated plate 12 is fastened so that a chamber 23 for the circulation of air is formed between the surface of plate 10 and the micro-perforated plate 12.
- the ventilation nozzles 11 are arranged in two substantially parallel series between frame 8 and plate 10 and are inserted into the holes 10b of plate 10 so as to face chamber 23.
- the ventilation nozzles 11 in a series are connected to one another by a pipe 18 in which ventilation air flows.
- the spray nozzles 9 comprise a hollow body 15 which has a first transverse hole 16 and a second transverse hole 17, said transverse holes 16, 17 facing each other, wherein the first transverse hole 16 is connected to an atomized water delivery pipe (not shown) and the second transverse hole 17 is connected to an atomizing air delivery pipe (not shown).
- the nozzles 9 end with a tip 21 for dispensing the atomized water which is introduced into the openings 10a of plate 10 and into the holes 19 of the micro-perforated plate 12 so as to emerge outside and thus spray water towards the paper sheet or strip.
- the moistening system 100 comprises a command and control unit configured to control the adjustment of the individual spray nozzles 9 by dosing the flow rate both of the water to be atomized and the atomizing air.
- a better adjustment of the amount of water to be atomized may be obtained with respect to the known solutions which provide exclusively adjusting the flow rate of water.
- various portions of the paper sheet or strip may be moistened in a different manner, for example the outer flaps more than the inner portion.
- the moistening system 100 of the invention allows avoiding the condensation on the outer face of the plate that comprises the dispensing openings of the atomized water. Indeed, the circulation of ventilation air in chamber 23 and through the micro-holes 20 of the micro-perforated plate 12 forms a barrier which prevents the rising of the water aerosol, thus preventing the condensation of water droplets and the successive dripping onto the paper sheet or strip.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
Description
- The present invention relates to a moistening system for paper sheets, specifically applied to machines for making corrugated cardboard.
- Machines for making multi-layer cardboard, such as corrugated cardboard, conventionally comprise systems for unwinding paper from special reels, systems for corrugating the intermediate layer(s) and systems for coupling and gluing the various layers.
- A conventional structure of corrugated cardboard provides two layers of corrugated paper separated by a flat sheet and closed on the two outer sides by flat sheets of paper called covers.
- In order to promote the coupling and gluing of the various corrugated and flat layers of paper to one another by a starch-based glue, it has proven to be suitable to moisten the sheets of paper prior to the coupling. Various moistening systems are known, inter alia rollers over which the water is dosed and over which the paper is passed, or specific moistening bars. Indeed, specific bars were prepared, equipped with nozzles that vaporize water over paper sheets which are unwound from reels. The water is dosed so as to obtain the moistening of the paper which, as mentioned, is advantageous in the gluing process.
- Such bars may be arranged above, below, or in certain cases, also beside the paper strip unwound from the reel, but when the bars in particular are arranged above the paper - which is the most convenient and widespread circumstance - condensation is created on the lower surface thereof which tends to drip onto the underlying paper, thus inducing actual wetting in the contact point. Such a wetting is detrimental for the quality results of the corrugated cardboard production method. Indeed thereby, instead of being homogeneously moistened, the paper has uneven areas in which it may be soaked in water.
- The problem at the basis of the present invention therefore is providing a moistening system for paper in cardboard making machines which overcomes the drawbacks of the prior art.
- Such a problem is overcome by a system as defined in the appended claims, the definitions of which form an integral part of the present description.
- The object of the present invention is a moistening system for paper sheets or strips in a cardboard making machine, comprising a frame which supports a plurality of nozzles for spraying water, comprising a micro-perforated plate comprising holes for distributing atomized water and micro-holes for dispensing a ventilation air flow.
- Another object of the invention is a corrugated cardboard making machine comprising one or more moistening systems as defined above.
- Further features and advantages of the present invention will become more apparent from the description of certain embodiments thereof, given hereinbelow only by way of a non-limiting, indicative example, with reference to the following figures:
-
Figure 1 shows an overall diagrammatic side view of a corrugated cardboard making machine; -
Figure 2 shows a side view of a detail of the machine inFigure 1 ; -
Figure 3a shows a perspective view of a paper moistening system according to the present invention; -
Figure 3b shows an exploded perspective view of the moistening system inFigure 3a ; -
Figure 4 shows a view of the moistening system inFigure 3a according to the cross section III-III. - With reference to the drawings, the corrugated cardboard making machine, indicated as a whole by
numeral 1, comprises, in the order from left to right, that is according to the processing line indicated by the horizontal arrow I, the following working units: - i) a first
paper unwinding unit 2a comprising apaper reel 3; - ii) a
first corrugation unit 4a for the paper unwound fromunit 2a; - iii) a second
paper unwinding unit 2b comprising apaper reel 3 configured to couple a flat sheet of paper to the corrugated sheet of paper from thecorrugation unit 4a; - iv) a third
paper unwinding unit 2c comprising apaper reel 3; - v) a
second corrugation unit 4b for the paper unwound from theunit 2c; - vi) a fourth
paper unwinding unit 2d comprising apaper reel 3 configured to couple a flat sheet of paper to the corrugated sheet of paper from thecorrugation unit 4b; - vii) a fifth
paper unwinding unit 2e comprising apaper reel 3 for a cover layer; - viii) an
alignment unit 5 for the sheets of paper A, B, C from the second, fourth and fifthpaper unwinding units - ix) a set of three
preheating rollers alignment unit 5; - x) a
hot gluing unit 7 for gluing the sheets A, B, C with paper starch glue by hot pressing to form a sheet of corrugated cardboard. - The machine briefly illustrated above is of the conventional type and therefore will not be described in greater detail.
- The
moistening system 100 according to the invention, shown inFigures 3a, 3b and4 , may be placed at one or more of the down arrows shown inFigure 1 according to the requirements of the system, the will of the user and the moistening level required in the various production steps. For example, themoistening system 100 may be placed: - between the first
paper unwinding unit 2a and thefirst corrugation unit 4a, and/or - between the third
paper unwinding unit 2c and thesecond corrugation unit 4b, and/or - at the
alignment unit 5 for the sheets of paper, and/or - immediately downstream of the set of three
preheating rollers - immediately upstream of the
hot gluing unit 7. - The
moistening system 100 comprises aframe 8 that supports a plurality ofspray nozzles 9 configured to dispense a mixture of water and air, aplate 10 that supports a plurality ofventilation nozzles 11 configured to dispense air, and amicro-perforated plate 12 comprisingholes 19 for distributing atomized water over a paper sheet or strip (which is, for example positioned at a predefined distance below system 100) and micro-holes 20 for dispensing a ventilation air flow, in whichplate 10 is sandwiched betweenframe 8 and themicro-perforated plate 12. -
Frame 8 comprises a nozzle-holder bar 13 and twolateral closing sides - A first and a second series of
spray nozzles 9 are arranged on opposite sides of the nozzle-holder bar 13. In the preferred embodiment of the drawings, thenozzles 9 of the two series are placed in staggered positions so as to optimize the distribution of the atomized water over the surface of the paper sheet or strip. -
Plate 10 comprises a plurality ofopenings 10a for housing thespray nozzles 9 and a plurality ofholes 10b for housing theventilation nozzles 11. -
Plate 10 further comprisesperipheral sides 22 on which themicro-perforated plate 12 is fastened so that achamber 23 for the circulation of air is formed between the surface ofplate 10 and themicro-perforated plate 12. - As shown in
Figures 3b and4 , theventilation nozzles 11 are arranged in two substantially parallel series betweenframe 8 andplate 10 and are inserted into theholes 10b ofplate 10 so as toface chamber 23. - The
ventilation nozzles 11 in a series are connected to one another by apipe 18 in which ventilation air flows. - As shown in
Figure 4 , thespray nozzles 9 comprise ahollow body 15 which has a firsttransverse hole 16 and a secondtransverse hole 17, saidtransverse holes transverse hole 16 is connected to an atomized water delivery pipe (not shown) and the secondtransverse hole 17 is connected to an atomizing air delivery pipe (not shown). Thenozzles 9 end with atip 21 for dispensing the atomized water which is introduced into theopenings 10a ofplate 10 and into theholes 19 of themicro-perforated plate 12 so as to emerge outside and thus spray water towards the paper sheet or strip. - On one of the
lateral closing sides frame 8, there are arranged: -
openings transverse holes 16 of thespray nozzles 9 insideframe 8 to an external source of pressurized water, preferably pressurized hot water; - an opening 25 which connects the air pipes connected to the respective
transverse holes 17 of thespray nozzles 9 to an external source of pressurized air; - ventilation
air delivery openings 26 which connect thepipes 18 connected to theventilation nozzles 11 to a source of ventilation air. - In certain embodiments, the
moistening system 100 according to the invention comprises a command and control unit configured to control the adjustment of theindividual spray nozzles 9 by dosing the flow rate both of the water to be atomized and the atomizing air. Thereby, a better adjustment of the amount of water to be atomized may be obtained with respect to the known solutions which provide exclusively adjusting the flow rate of water. By virtue of the adjustment of theindividual nozzles 9, various portions of the paper sheet or strip may be moistened in a different manner, for example the outer flaps more than the inner portion. - Therefore, the
moistening system 100 of the invention allows avoiding the condensation on the outer face of the plate that comprises the dispensing openings of the atomized water. Indeed, the circulation of ventilation air inchamber 23 and through the micro-holes 20 of themicro-perforated plate 12 forms a barrier which prevents the rising of the water aerosol, thus preventing the condensation of water droplets and the successive dripping onto the paper sheet or strip. - It is apparent that only certain particular embodiments of the present invention have been described, to which those skilled in the art can make those modifications required for adapting it to particular applications, without moreover departing from the scope of protection of the present invention.
Claims (11)
- A moistening system (100) for paper sheets or strips in a cardboard making machine, comprising a frame (8) which supports a plurality of nozzles (9) for spraying water, characterized in that it comprises a micro-perforated plate (12) comprising holes (19) for distributing atomized water and micro-holes (20) for dispensing a ventilation air flow.
- The system (100) according to claim 1, comprising a plate (10) which supports a plurality of ventilation nozzles (11), wherein the plate (10) is sandwiched between the frame (8) and the micro-perforated plate (12).
- The system (100) according to claim 2, wherein the frame (8) comprises a nozzle-holder bar (13) and two lateral closing sides (14a, 14b), a first and a second series of said spray nozzles (9) being arranged on opposite sides of the nozzle-holder bar (13), wherein the nozzles (9) of the two series are preferably placed in staggered positions.
- The system (100) according to claim 2 or 3, wherein the plate (10) comprises a plurality of openings (10a) for housing the spray nozzles (9) and a plurality of holes (10b) for housing the ventilation nozzles (11).
- The system (100) according to any one of claims 2 to 4, wherein the plate (10) comprises peripheral sides (22) on which the micro-perforated plate (12) is fastened so that a chamber (23) for the circulation of air is formed between the surface of the plate (10) and the micro-perforated plate (12) .
- The system (100) according to claim 5, wherein the ventilation nozzles (11) are arranged in two substantially parallel series between the frame (8) and the plate (10) and are inserted into the holes (10b) of the plate (10) so as to face the chamber (23), and wherein the ventilation nozzles (11) in each series are connected to one another by a pipe (18) in which ventilation air flows.
- The system (100) according to any one of claims 1 to 6, wherein the spray nozzles (9) comprise a hollow body (15) which has a first transverse hole (16) and a second transverse hole (17), said transverse holes (16, 17) facing each other, wherein the first transverse hole (16) is connected to a water-to-be-atomized delivery pipe and the second transverse hole (17) is connected to an atomizing air delivery pipe, and wherein the nozzles (9) end with a tip (21) for dispensing the atomized water which is introduced into the openings (10a) of the plate (10) and into the holes (19) of the micro-perforated plate (12) so as to emerge outside and thus spray water towards the paper sheet or strip.
- The system (100) according to claim 7, wherein on one of the lateral closing sides (14a, 14b) of the frame (8), there are arranged:- openings (24a, 24b) which connect the water pipes connected to the respective transverse holes (16) of the spray nozzles (9) inside the frame (8) to an external source of pressurized water, preferably pressurized hot water;- an opening (25) which connects the air pipes connected to the respective transverse holes (17) of the spray nozzles (9) to an external source of pressurized air;- ventilation air delivery openings (26) which connect the pipes (18) connected to the ventilation nozzles 11 to a source of ventilation air.
- The moistening system (100) according to any one of claims 1 to 8, comprising a command and control unit configured to control the adjustment of the individual spray nozzles (9) by dosing the flow rate both of the water to be atomized and the atomizing air.
- A corrugated cardboard making machine (1), comprising the following working units in sequence:i) a first paper unwinding unit (2a) comprising a paper reel (3);ii) a first corrugation unit (4a) for the paper unwound from the unit (2a);iii) a second paper unwinding unit (2b) comprising a paper reel (3) configured to couple a flat sheet of paper to the corrugated sheet of paper from the corrugation unit (4a);iv) a third paper unwinding unit (2c) comprising a paper reel (3);v) a second corrugation unit (4b) for the paper unwound from the unit (2c);vi) a fourth paper unwinding unit (2d) comprising a paper reel (3) configured to couple a flat sheet of paper to the corrugated sheet of paper from the corrugation unit (4b);vii) a fifth paper unwinding unit (2e) comprising a paper reel (3) for a cover layer;viii) an alignment unit (5) for the sheets of paper (A, B, C) from the second, fourth and fifth paper unwinding units (2b, 2d, 2e);ix) a set of three preheating rollers (6a, 6b, 6c) for preheating the sheets of paper (A, B, C) from the alignment unit (5);x) a hot gluing unit (7) for gluing the sheets (A, B, C) with paper starch glue by hot pressing to form a sheet of corrugated cardboard,characterized in that it comprises one or more paper moistening systems (100) according to any one of claims 1 to 9.
- The machine (1) according to claim 10, wherein the moistening system (100) is placed:- between the first paper unwinding unit (2a) and the first corrugation unit (4a), and/or- between the third paper unwinding unit (2c) and the second corrugation unit (4b), and/or- at the alignment unit (5) for the sheets of paper, and/or- immediately downstream of the set of three preheating rollers (6a, 6b, 6c), and/or- immediately upstream of the hot gluing unit (7) .
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102020000024976A IT202000024976A1 (en) | 2020-10-22 | 2020-10-22 | SYSTEM FOR WETTING PAPER SHEETS |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3988217A1 true EP3988217A1 (en) | 2022-04-27 |
Family
ID=74068605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21200875.9A Pending EP3988217A1 (en) | 2020-10-22 | 2021-10-05 | A moistening system for paper sheets |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3988217A1 (en) |
IT (1) | IT202000024976A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0936059A2 (en) * | 1998-02-06 | 1999-08-18 | Mitsubishi Heavy Industries, Ltd. | Corrugator and corrugated fiberboard sheet manufacturing method |
US20050082398A1 (en) * | 2002-02-19 | 2005-04-21 | Frederic Noelle | Device for spraying water with a thin seal support |
EP1872864A2 (en) * | 2006-06-27 | 2008-01-02 | Mankiewicz Gebr. & Co. (GmbH & Co. KG) | Device and method for applying a liquid coating to a surface |
WO2013167771A1 (en) * | 2012-05-07 | 2013-11-14 | Xavier Blanch Andreu | Device for applying a liquid product to a sheet of paper |
CN105750130A (en) * | 2016-05-11 | 2016-07-13 | 陈云霞 | Bundling spraying device |
-
2020
- 2020-10-22 IT IT102020000024976A patent/IT202000024976A1/en unknown
-
2021
- 2021-10-05 EP EP21200875.9A patent/EP3988217A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0936059A2 (en) * | 1998-02-06 | 1999-08-18 | Mitsubishi Heavy Industries, Ltd. | Corrugator and corrugated fiberboard sheet manufacturing method |
US20050082398A1 (en) * | 2002-02-19 | 2005-04-21 | Frederic Noelle | Device for spraying water with a thin seal support |
EP1872864A2 (en) * | 2006-06-27 | 2008-01-02 | Mankiewicz Gebr. & Co. (GmbH & Co. KG) | Device and method for applying a liquid coating to a surface |
WO2013167771A1 (en) * | 2012-05-07 | 2013-11-14 | Xavier Blanch Andreu | Device for applying a liquid product to a sheet of paper |
CN105750130A (en) * | 2016-05-11 | 2016-07-13 | 陈云霞 | Bundling spraying device |
Also Published As
Publication number | Publication date |
---|---|
IT202000024976A1 (en) | 2022-04-22 |
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