EP2739194A2

EP2739194A2 - Device for wetting a carrier medium, such as a paper web

Info

Publication number: EP2739194A2
Application number: EP12723474.8A
Authority: EP
Inventors: Andreas Hug; Reto Killer; Edy SCHMIDLIN
Original assignee: Audag AG
Current assignee: Audag AG
Priority date: 2011-05-31
Filing date: 2012-05-23
Publication date: 2014-06-11
Also published as: WO2012163770A3; CA2837655A1; WO2012163770A2; KR20140057218A; CN103732112A; US20140318448A1; DE102011102882A1; JP2014525821A; SG195169A1

Abstract

A device for wetting a carrier medium, such as a paper web, a material web, a nonwoven web or a woven fabric web or a knitted fabric web, is provided, having an injection unit consisting of a first elongate hollow element with an opening, preferably with a plurality of openings which are spaced apart from one another in the longitudinal direction, and of a pump which is connected to the elongate hollow element, pumps the wetting liquid through the elongate hollow element and through the opening or the openings, and, as a result, injects a single or multiple jet into the carrier medium.

Description

Device for moistening a carrier medium,

like a paper web

The present invention relates to a device for moistening a carrier medium, such as a paper web, a fabric web, a nonwoven web or a fabric web or knitted web.

Such devices are known for example from EP1450660B1, EP1597993B1 and WO 2010/072298.

While the device according to the two said EP patents is suitable for moistening paper webs with aqueous liquids, the device according to said WO-document is for the moistening with liquids with volatiles, such as alcohols, for the purpose of cleaning or sterilization the hands of a surgeon or a mechanic or surfaces, for example in operating theaters or in clean rooms. Practical tests with the known devices have shown that they fulfill their intended purpose, and above all that it is possible by means of a roller, in particular a grooved roller, to evenly moisten a paper web without the moistened paper web being relatively weak is tearing during dispensing or extraction. The device according to said WO document also avoids the occurrence of troublesome evaporation losses, even if the volatile constituent liquid is present over a longer period of days or weeks in a trough into which the underside of the grooved roll dips. Somewhat problematic in the known devices, however, is the somewhat complex construction, in particular in the variant according to WO 2010/072298, in which a sealed lid above the tub is required. Further, depending on the application, for example for the moistening of toilet paper with water or the moistening of paper webs for the purpose of sterilization, different constructions are required so that different interpretations are necessary for different purposes.

The object of the present invention is to provide a novel and compact apparatus for moistening carrier media which is usable with only minor adjustments for a wide variety of moistening purposes and liquid properties, such as viscosity or volatility, which are relatively simple and easy to manufacture is inexpensive, but still allows a uniform, evaporation-free or at least low evaporation humidification and avoids unwanted losses of the liquid to be used. In order to clarify the object underlying the present invention, it is also pointed out that when using a paper web with individual sections of approximately A4 size for sterilization purposes, approximately 3 g of isopropanol must be distributed to the surface of the sheet. This poses a critical requirement for the dispensing of the liquid if it is to be distributed over its full area and to a fairly uniform extent over an A4 section.

However, it is not absolutely necessary to achieve an absolutely uniform distribution of the liquid, since liquid which is applied in places to strongly absorbent carrier media may be deposited in the carrier medium short time both in the longitudinal direction and in the transverse direction will distribute. Nevertheless, a regular application of the liquid should take place, so that there is a fairly uniform distribution immediately after delivery of the section. Excessive moistening of the carrier medium is in most cases absolutely to be avoided, since with materials such as paper wet spots can reduce the strength of the material web to such an extent that undesirable cracking of the web is to be feared. To achieve this object, a device for moistening a support medium, such as a paper web, a fabric web, a nonwoven web or a fabric web or knitted web is provided according to the invention, comprising an injection unit consisting of an elongated hollow member or injection tube with an opening, preferably with a plurality in the longitudinal - Direction spaced apart openings and from a connected to the elongated hollow member pump, which pumps the moistening liquid through the elongated hollow member and through the opening or the openings and thereby injects a single or multiple beam in the support medium.

With this device, the beam is homogeneously and compactly placed in or directly on the support medium, without that by a spraying a finely divided spray is formed, resulting in loss of liquid. In this way, a controlled, complete, sputter-free and completely or largely evaporation-free uniform liquid application of different carrier media.

Furthermore, this can uniformly be applied to the carrier medium with a constant amount per unit area. Furthermore, no or only very small amounts of the ingredients of the liquid volatilize during the admission process. The carrier medium can always be applied completely across the board. The guidance of the carrier medium in the injection unit allows the lossless and complete admission of the same.

According to the invention, the carrier medium is wholly or partially, without or with a defined distance around the elongated hollow body, by means of a suitable guide device. around the injection tube, guided around. In this way, the liquid can be brought directly into or at least substantially directly to the carrier medium, which also ensures that hardly any losses can occur.

The device has an output mechanism, which is arranged in particular on the inlet side of the elongate hollow body and makes it possible to obtain a dispensable sheet-like part of the web of the carrier medium in the wet state without moistening a subsequent part. The output of the carrier medium is preferably controlled by electronic pulse.

It when the elongated hollow member of the injection unit cooperates with a hollow slide, which is designed to perform a relative movement with respect to the elongate hollow member, which serves for the release or the closure of said openings is particularly favorable.

In this case, the slider can be arranged inside or outside the elongated hollow member. Further, the slider may be made to perform a linear motion or a rotational movement with respect to the elongate hollow member, or combined rotational and linear movements may be performed. It is not absolutely necessary for the slider to move, instead the slider could be fixed and the elongate hollow member movably arranged to open and close said openings, or both the slider and the elongate hollow member could be moved.

In addition, the relative movement can be carried out so that the opening width of the openings for metering the liquid dispensing is controllable. It can seals between the slide and the elongated hollow member are arranged to prevent leaks, especially in the closed state of the openings.

It is also particularly favorable when both the elongated hollow member and the slide are formed by a respective hollow pipe section, wherein one of the hollow pipe sections may have a longitudinal slot in the longitudinal direction.

The openings of the elongated hollow member or hollow tube may have outlines selected from the group of circular, oval, elliptical, square, rectangular, triangular and polygonal.

The cross-sectional areas of the openings can be chosen the same or different, the latter in particular if a uniform amount of liquid from each opening with pressure decrease along the elongated hollow tube to be compensated by increasing the opening cross-section or when a deliberately uneven liquid output along the elongated hollow member should be desired. The passages in the wall of the elongated hollow member which open at the openings may have outwardly from the interior of the elongated hollow member a shape converging from the group, diverging, first converging and then diverging, first converging and then diverging, trumpet-shaped and is selected calyx. Such designs can be readily generated by spark erosion, by electrochemical machining, or by laser or water jet.

When the liquid is withdrawn from a solid bottle, a controllable valve is preferably inserted into the conduit between the bottle and the injection unit, which is opened by the pump when liquid is withdrawn and discharged, allowing an air supply to the pressure equalizing bottle. Instead, a thin-walled, compressible by the ambient pressure, i. collapsible bottle be used, so that a vent valve is not required. If necessary, the pump can serve as an on / off valve.

The device or the injection system can be used under stationary or mobile conditions.

The invention will be explained in more detail below by means of exemplary embodiments with reference to the drawings, in which:

1 shows a device according to the invention in a schematic representation, 2 is an enlarged view of the hollow tube of the embodiment of FIG. 1, to show the selectability of the length of the hollow tube,

3A to 3H different ways of arranging the openings of the hollow tube,

4 shows several alternatives for the outline of the openings,

5 shows various possible cross-sectional shapes of the passages leading to the individual openings,

6 shows a preferred embodiment according to the invention with a linear slide,

Fig. 7 shows a further preferred embodiment according to the invention with a rotary valve, Fig. 8A to 8D different possible embodiments of a guide device for a web-shaped support medium, and

9A to 9F show a preferred arrangement of the injecting unit, wherein Figs. 9A and 9B show the humidifying position of the injection tube, Figs. 9C and 9D show the emptying position of the injection tube, and Figs. 9E and 9F show the sealing position of the injection tube, respectively in a perspective view View and in a front view. 1 shows a device 10 according to the invention for moistening a carrier medium 12, such as a paper web 12, a fabric web 12, a nonwoven web 12, a fabric web 12 or a knitted web 12. The device 10 has an injection unit 14 consisting of an elongated hollow member 16 a plurality of openings 18 spaced from each other in a longitudinal direction of the hollow member 16. Furthermore, the apparatus 10 comprises a pump 20 connected to the elongate hollow member 16 which pumps the moistening liquid through the elongated hollow member 16 and through the openings 18 and thereby injects it into or onto the support medium 12.

1 shows a guide device 24, in which the web-shaped carrier medium 12 is guided via deflection rollers 26, 28 from a carrier medium roll 30 to the injection unit 14, so that the carrier medium 12 completely or partially, with or without a defined distance around the injection tube 16 around can be performed. As a result, the liquid 22 can be applied directly in or at least substantially directly to the carrier medium 12. After moistening the carrier medium 12, it is guided past an output mechanism 32 or an output mechanism 32. The dispensing mechanism 32 is disposed on the inlet side 34 of the elongated hollow body 16 and allows the reference of a dispensable sheet-shaped part 12 of the web of the carrier medium 12 in the wet state, without a subsequent part 12 of the support medium 12 is moistened. In order to ensure the covering of the sheet-shaped part 12 of the web of the carrier medium 12 in the moistened or wet state, a separating device 36 is provided on the dispensing mechanism 32, which may comprise eg a knife 36, a serrated edge 36 or a cutting device 36. The trajectory of the carrier medium 12 may optionally be subject to perforation or other weak points such as lateral indentations. see to facilitate the tearing of individual sections 12.

The output mechanism 32 is preferably controllable by means of an electronic pulse generator 38. As a result, the desired amount of liquid 22 to be dispensed or the exact length of the carrier medium 12 to be humidified as well as the dispensing speed of the carrier medium 12 can be adjusted or regulated in a known manner by means of existing control and regulating units 38. The dispensing mechanism 32 may be connected to the pump 20 which then also serves as a

/ Shutdown mechanism for the liquid supply 22 to the output mechanism 32 and for the partitioning of a liquid reservoir 40 may serve. This succeeds particularly well when the pump 20 is designed as a positive displacement pump 20.

The injection of the liquid 22 is effected by means of the injection unit 14, which is adapted to the respective liquid 22 and the respective carrier medium 12 which are to be dispensed. In the injection unit 14, the concentration of certain substances in the liquid 22 can be measured by means of a measuring unit 42. If this drops below a certain minimum value, eg after a longer service life, the injection unit 14 is emptied before the delivery to the carrier medium 12 takes place. The renewed pressure build-up and the liquid supply are then carried out again via the variable metering pump 20. The amount of liquid and the pressure are then regulated by means of the electronic control 38 as usual. By means of a selected adaptable design of the pump 20, a plurality of different liquids 22 and a large range of discharged amounts of liquid 22 per unit area of the support medium 12 are covered, it is only necessary, the control of the pump 20 of the desired dosage or ver - used to adjust liquid 22. Thus, with a basic design, a wide range of applications can be covered inexpensively. Also, the length of the injection unit 14 can be easily adjusted according to the respective desired web width of the support medium 12 without the design of the pump 20 itself must be changed.

The dispensable liquid 22 may be dispensed from the liquid reservoir 40, e.g. a fixed bottle 40, wherein in line 44 between see the bottle 40 and the injection unit 14, a controllable valve 46 is inserted, which can be opened at liquid decrease and -ausgäbe due to the use of the pump 20. The valve 46 can be connected to the liquid reservoir 40 by means of a line 48 which is provided between the valve 46 and the liquid reservoir 40 and thus enables an air supply into the liquid reservoir 40 for pressure equalization or forced ventilation. The forced ventilation thus prevents the build-up of a vacuum in the liquid reservoir 40. Alternatively, the liquid reservoir 40 may consist of a thin-walled, collapsible bottle 40, which can be compressed by the ambient pressure and thus a ventilation line between the injection unit 14 and

Liquid reservoir 40 makes unnecessary. The injection system 14 is preferably closed and designed to be safe from evaporation. By means of the valve 46, the liquid supply is sealed off before the injection unit 14 at a standstill. The injection unit 14 is designed in such a way that there is no loss of content during continuous, cyclic and acyclic operation and during / after service life, and optimum action is always available. The valve 46 could also be arranged between the pump 20 and the liquid reservoir 40 or integrated into the pump 20. By means of single or multiple jet liquid 22 is injected under pressure into the carrier medium 12. The beam is homogenous (compact) in or directly onto the carrier medium 12. The device 10 according to the invention enables controlled, complete, sputter-free and completely or largely evaporation-free application of liquid to various carrier media 12. The device 10 makes it possible for the carrier medium 12 to be uniform a constant amount of liquid 22 per unit area can be applied and that no or only very small amounts of the ingredients of the liquid 22 can volatilize during the loading process. The carrier medium 12 is charged with liquid 22 in such a way that it is distributed completely on the carrier medium 12 over the entire area. The guidance of the carrier medium 12 in the region of the injection unit 14 allows the lossless and complete admission of the same with liquid 22. The carrier medium 12 is wholly or partly, without or with a defined distance around the injection tube 16 around. The injection system may be equipped with electronic monitoring and reporting in order to communicate, by means of an interface 50, possibly a wireless communication option, the fill level of the liquid 22 or the remaining amount of carrier medium 12 to a central location (not shown).

Emptying of the liquid, either the amount that is present in the hollow member 16 or the liquid reservoir 40, can be done by a drain valve 52 when the liquid used 22 certain minimum requirements no longer met, for example, after a longer life and / or because exceeded a shelf life has been. As a rule, the measuring device 42 monitors concentration values of certain portions of the liquids 22. If these no longer comply with the minimum requirements, the drain valve 52 can then be opened be and thus empty the existing in the hollow member 16 liquid 22 at one of its ends 54. If the liquid reservoir 40 is to be emptied, this can be communicated to operating personnel either at the device 10 according to the invention or by means of data communication via the interface 50, so that they then remove the liquid 22 via the emptying valve 52.

FIG. 2 is an enlarged view of the hollow tube 16 of the embodiment according to FIG. 1. In this, it is made clear that the length of the hollow tube 16 is freely selectable and can be easily adapted to the desired width of the carrier medium 12.

As can be seen in FIG. 3, the openings 18 of the hollow member 16 may be arranged in at least two rows around the longitudinal axis of the elongated hollow member 16 and / or different exit angles of the liquid 22 in the longitudinal direction of the elongate hollow member 16 and / or in radial planes have the said longitudinal axis. The exit angle is preferably oriented away from the delivery roller 30 so that the delivery roller 30 conveys at least substantially dry web material 12.

FIG. 4 shows various alternatives for the outline shape of the openings 18 of the elongate hollow member 16. The outline shape of an opening 18 may be circular, oval, elliptical, square, rectangular, triangular and polygonal. The exact shape of the opening 18 is typically selected to allow the best possible distribution of the liquid 22 on the carrier medium 12. It would also be possible to provide different sizes or shapes of the openings 18 along the hollow member 16, so that, for example, smaller openings 18 are provided on the edge of the hollow member 16 than in the middle of the hollow member 16. In in other words, the cross-sectional area of the openings 18 along a hollow member 16 may be chosen to be either the same or different. Figures 5A to 5H show that the passages 56 in the wall 58 of the elongate hollow member 16 which terminate at the openings 18, outwardly from the interior of the elongate hollow member 16, have a shape converging, diverging, converging, from the group and then diverging, at first converging and then diverging, trumpet-shaped and having a calyx. This different shape of the passages 56 allows a more accurate adjustment of the distribution of the liquid 22, which passes from the openings 18 and is associated with the carrier medium 12 in connection.

As shown in FIG. 6, the elongate hollow member 16 of the injection unit 14 may be configured to cooperate with a hollow slider 60, which slider 60 is adapted to make relative movement with respect to the elongated hollow member 16. This relative movement serves to release or close said apertures 18. The slider 60 of FIG. 6 is disposed within the elongated hollow member 16, but could instead be located outside of the elongated hollow member 16. To open and close the openings 18, the elongated hollow member 16 fixed and the slider 60 can be arranged to be movable.

Alternatively, the slider 60 could be fixed and the elongated hollow member 16 movably arranged. It would also be possible for both the slider 60 and the elongate hollow member 16 to be movable. Regardless of how the relative movement between the slider 60 and the hollow member 16th is brought about, this relative movement between the slider 60 and the elongated hollow member 16 is preferably executable so that the opening width of the openings 18 for metering the liquid delivery is controllable. Both the elongated hollow member 16 and the slider 60 of Figure 6 are formed by a respective hollow pipe section, wherein one of the hollow pipe sections in the longitudinal direction may have a longitudinal slot, that may be C-shaped.

FIG. 7 shows a further variant of a slide 60 which is designed to dispense the liquid 22 in such a way that it can be used to carry out a flow

Rotary movement with respect to the elongated hollow member 16 is formed. It would also be conceivable to provide a slide 60 which combines the linear movement of the slider 60 of Figure 6 with the rotational movement of the slider 60 of Figure 7 and is designed to perform a combined rotary and linear movements. In all variants of slides 60 listed here, seals 62 are arranged between the slide 60 and the elongated hollow member 16 in order to prevent leaks, especially in the closed state of the openings 18. 8A to 8D show the guidance of the carrier medium 12 past the elongate hollow member 16, which is designed to dispense the moistening liquid 22. 8A shows that in a rest position of the device 10 according to the invention, the carrier medium 12 is guided by means of three deflection rollers 26, 28, 64 to the hollow member. A movable deflecting roller 66 is located at a distance from the hollow member 16 in a rest position. FIG. 8B shows how, during the activation of the device 10, this movable deflection roller 66 is brought from an inoperative position into an active position in order to guide the carrier medium 12 into direct contact with the hollow member 16. 8C shows a perspective top view of the hollow member 16, in which the movable deflection roller 66 is in an active position and the carrier medium to be moistened 12 is guided past the openings 18 of the hollow member 16 to the dispensing mechanism 32. FIG. 8D shows a side view of the device 14 according to FIG. 8C.

The device 10 according to the invention can be used under stationary or mobile conditions. The minimum volume of the injection unit 14 depends on the amount of carrier medium 12 to be humidified and is at least 4000 mm ³ or 4 ml. The system operating pressure may be between +0.005 bar and +15.00 bar or higher. By means of the injection tube 16, the carrier medium 12 is applied uniformly and comprehensively with a certain adjustable amount of liquid 22. The quantity of liquid dispensed is determined by the system pressure, the arrangement, design and construction of the outlet openings 18, as well as the volume of the injection tube (s) 18.

The outlet openings 18 of the injection tube (s) 16 are designed in such a way that the adhesive / cohesive behavior of the liquid 22 completely or partially prevents it from escaping or evaporating in a pressure-free or resting state. The arrangement of the outlet openings 18 is symmetrical, asymmetrical or both depending on the properties of the liquid 22. The shape of the outlet openings 18 per injection tube 16 can be used uniformly or mixed depending on the properties of the liquid 22. The side walls 56 of the outlet openings 18 may be linear, convex, concave or mixed. The input and output edge of the opening 18 may be tapered, radius provided o- the beveled. The diameter of the outlet openings 18 may be different at the entrance and exit. The inner diameter at the narrowest part of the outlet opening 18 may be from 0.005 mm to 2.00 mm o- the greater amount. The narrowest or widest point of the outlet opening 18 may be centered or downwards or upwards deviating. Entry and exit angles of the outlet openings 18 may be different. The emission angle of the outlet openings 18 can be at the right angle or in a different angular position to the injection tube 16.

As a carrier medium 12, for example, a paper web 12 can be used which weighs between 10g / m ² and 200g / m ² , this can be applied with 5ml / m ² to 100 ml / m ² liquid 22.

Referring now to Figs. 9A to 9F, a particularly preferred embodiment will now be discussed.

In FIGS. 9A to 9B, a first position of the injection tube 16 of an injection unit 14 according to one of the previous figures, in particular according to FIG. 7, for wetting the material web 12 with liquid 22, i. for injecting the liquid 22 into the web 12. The injection tube 16 is rotated during the moistening against the medium to be moistened 12, so that the outlet openings 18 are directed to it. In this position, the jet strikes the material web 12, which is arranged in the immediate vicinity of the injection tube and preferably in contact with the injection tube, approximately at "right angles." For this purpose, the injection tube 16 is rotatably mounted and is actuated by means of an electric servomotor (not shown) with multiple shift positions (not shown) or similar drive (not shown) is automatically rotated between the various positions illustrated in connection with Figs. 9A-9F.

FIGS. 9C and 9D show a second position of the injection tube 16 of the injection unit 14, in which the injection tube 16 is designed for the purpose of spraying or for emptying down. That is, the injection tube 16 is rotated about the central longitudinal axis A to a position in which the jet of liquid 22 can exit downwardly "outward." This position is selected for cleaning purposes and with insufficient density of the liquid 22. Again, the control is automatic but may also be triggered by the user if desired The liquid 22 may be collected in a suitable container (not shown).

Figures 9E and 9F show a third position of the injection tube 16 of the injection unit 14 in which the injection tube 16 is rotated to a stop position in which the injection tube 16 is sealed against liquid leakage. In this case, the injection pipe can be closed or sealed by a stationary hollow pipe section 68 which partially encloses the injection pipe 16. This means that after the moistening process has taken place, the injection tube 16 is rotated into a "rest position." In this position, the outlet openings 18 of the injection tube 16 are closed or sealed by a "support" (hollow tube section, bar-shaped part or seal).

The stationary hollow pipe section 68 can be provided with an elongated cutout, which allows the wetting of the material web 14 and the emptying of the injection pipe 16 in the first and second positions unhindered. Instead of using a hollow tube section 68 which partially encloses the injection tube 16, a bar-shaped part can be arranged parallel to the injection tube 16, which performs the corresponding function, ie, closing the opening or openings 18 of the injection tube 16. Furthermore, the rest resting on the injection tube 16 edition, whether by a hollow tube section 68 or formed by a bar-shaped part, be arranged stationary or movable. Movable in the sense that it can be both rotatable or fixed to the longitudinal axis A, as well as can be moved back and forth.

Regardless of which arrangement is chosen, i. Whether a stationary hollow pipe section 68 encompassing the injection pipe 16 or a movable hollow pipe section 68 partially encompassing the injection pipe 16 (which would also be possible) or a bar-shaped closure part is selected, a complete seal or at least one qualitative seal can be achieved by means of suitable seals 70 High quality sealing can be achieved.

The shape and design of the seal 70 can be chosen at will. For example, it can be realized by a plastic strip that can be squeezed, which is glued into the section 68 that partially surrounds the injection tube 16, that completely bridges the opening or openings 18 in the injection tube 16 in the third position and therefore seals them or by individual O's Rings are formed, each of which surrounds an outlet opening 18 in the injection tube 16 in the third position thereof. When a beam-shaped end part is wound, an elongated plastic strip 70 or O-rings 70 can also be used, or the end part itself 68 can be formed from an elastic material and thus assume the sealing function. The cross-sectional shape of the seal 70 may be, for example, oval, rectangular, circular or square.

The injection tube 16 of FIGS. 9A to 9F can also be axially fixed when the hollow tube section 68 partially surrounding the injection tube 16 is movably arranged and about the longitudinal axis A of the Injection tube 16 is rotated and / or guided along the longitudinal axis A of the injection tube 16. Such an axial displacement comes into question when the hollow pipe section 68 is provided, for example, with slits extending over a partial circumference of the hollow pipe section 68 which in the first position are aligned with the openings 18 of the injection pipe 16 but are not aligned with the openings 18 in the third position and thus achieve a seal. The hollow pipe section 68 could also be made both rotatable and movable, so that a rotation and a displacement of the hollow pipe section 68 can take place.

LIST OF REFERENCE NUMBERS

10 device

12 carrier medium

14 injection unit

16 hollow member

18 openings

20 pump

22 liquid

24 guiding device

26 pulley

28 pulley

30 carrier media roll

32 discharge mechanism 34 inlet side

36 separating device

38 pulse generator

40 liquid supply

42 measuring unit

44 line

46 valve

48 line

50 interface

52 valve

54 end

56 passages

58 wall

60 slides

62 seal

64 pulley

66 pulley

68 hollow pipe section

70 seal

A longitudinal axis

Claims

claims

Apparatus (10) for moistening a carrier medium (12), such as a paper web, a fabric web, a nonwoven web or a fabric web or knitted web, with an injection unit (14) consisting of an elongated hollow member (16) with an opening (18), preferably with a plurality of longitudinally spaced apart apertures (18), and a pump (20) connected to the elongate hollow member (16), which supplies the wetting liquid (22) through the elongated hollow member (16) and through the aperture (18). or the openings (18) pumped through and thereby injected a single or multiple beam into the carrier medium (12).

Device (10) according to claim 1, characterized in that a guide device (24) is provided which guides the carrier medium (12) into the immediate area of the injection unit (14).

Apparatus (10) according to claim 2, characterized in that the guide means (24) for guiding the carrier medium (12) is formed wholly or partly, with or without a defined distance around the injection tube (16).

Device (10) according to any one of the preceding claims, characterized in that the liquid (22) directly in or at least substantially directly on the carrier medium (12) can be brought.

Device (10) according to one of the preceding claims, characterized in that an output mechanism (32) is provided, which is arranged in particular on the inlet side (34) of the elongate hollow member (16) and the reference of a dispensable sheet-like part (12) Allows trajectory of the carrier medium (12) in the wet state, without a subsequent part (12) is moistened.

Device (10) according to one of the preceding claims, characterized in that the output mechanism (32) is controllable by means of an electronic pulse generator (28).

Device (10) according to any one of the preceding claims, characterized in that the elongate hollow member (16) of the injection unit (14) cooperates with a hollow slide (60) adapted to perform relative movement with respect to the elongated hollow member (16) for releasing or closing said openings (18).

Device (10) according to claim 7, characterized in that the slide (60) is arranged inside or outside the elongate hollow member (16).

Device (10) according to claim 7 or 8, characterized in that the slider (60) is designed to perform a linear movement or a rotational movement with respect to the elongated hollow member (16) or is designed to carry out combined rotary and linear movements ,

10. Device (10) according to one of claims 7 to 9, characterized in that for opening and closing said openings (18) either the elongated hollow member (16) fixed and the slide (60) are movably arranged or the slider (60 ) and the elongated hollow member (16) are movably arranged or both the slide (60) and the elongated hollow member (16) are movable.

1 1. A device (10) according to any one of claims 7 to 10, characterized in that the relative movement of the slider (60) and the elongate hollow member (16) is executable so that the opening width of the openings (18) controllable for metering the liquid delivery is.

12. Device (10) according to one of claims 7 to 1 1, characterized in that seals (62) between the slide (60) and the elongate hollow member (16) are arranged to prevent leaks, especially in the closed state of the openings (18 ) to avoid.

13. Device (10) according to one of claims 7 to 12, characterized in that both the elongate hollow member (16) and the slide (60) are formed by a respective hollow pipe section, wherein one of the hollow pipe sections in the longitudinal direction may have a longitudinal slot, ie C-shaped executed.

14. Device (10) according to any one of claims 7 to 13, characterized in that the openings (18) of the elongate hollow member (16) or hollow tube (16) have contours, which are selected from the group circular, oval, elliptical, square, rectangular, triangular and polygonal are selected.

15. Device (10) according to any one of claims 7 to 14, characterized in that the cross-sectional areas of the openings (18) are chosen to be the same or different.

A device (10) according to any one of claims 7 to 15, characterized in that the passages (56) in the wall (58) of the elongate hollow member (16) opening at the openings (18) are from the interior of the elongate hollow member (16) outwardly have a shape that converges from the group, diverges, first converges and then diverges, first converges and then divergent, trumpet-shaped and blumenkelchförmig is selected.

17. Device (10) according to any one of claims 7 to 16, characterized in that the liquid 22 from a solid bottle (40) can be output and a controllable valve (46) in the conduit (48) between the bottle (40) and the injection unit (14) is inserted, which is opened by the pump (20) during liquid withdrawal and discharge and an air supply into the bottle (40) for

Pressure equalization allows.

18. Device (10) according to any one of claims 7 to 16, characterized in that a thin-walled, compressible by the ambient pressure, ie collapsible bottle (40) is used. Device (10) according to one of the preceding claims, characterized in that the pump (20) serves as an on / off valve for the liquid supply and foreclosure from the reservoir (40).

Device (10) according to one of claims 7 to 15, characterized in that the openings (18) are arranged in at least two rows around the longitudinal axis of the elongated hollow member (16) and / or different exit angles of the liquid (22) in the longitudinal direction of the elongated hollow member (16) and / or in radial planes to said longitudinal axis.

Device (10) according to at least one of the preceding claims, characterized in that the injection tube (16) is movable between at least two positions, a moistening position and a sealing position and preferably also in a discharge position.