CA2145125A1

CA2145125A1 - Package unit with bulk packaging material and apparatus for producing same

Info

Publication number: CA2145125A1
Application number: CA 2145125
Authority: CA
Inventors: Franz Sperner
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-24
Filing date: 1995-03-21
Publication date: 1996-08-25
Also published as: DE29503127U1

Abstract

A packing unit (20) is disclosed for filling cavities in packaging containers, boxes, etc. in order to hold items securely in place. It has a having a casing (21) consisting of a web of material (23) and formed in the manner of a wound tubular roll (22) and filled with free-running packing material (11) characterized in that the web of material takes the form of a web (23) of preferably biodegradable non-woven material which is impregnated substantially over its entire surface with a heat-sealable bonding agent. A
device (31) for manufacturing the packing units (20) is also disclosed. It has a preferably vertically oriented hollow winding core (32) with a feed mechanism (33) for feeding the web of material. The mechanism is oriented at a given angle to the axis of the winding core (32). The device includes a drive mechanism (36) to withdraw the web of material (23) from the feed device (33) and for wrapping the web of material around the winding core (32). Also, a device (46) is provided for joining the overlapping longitudinal edges (24, 25) of the web of material (23) in the area where the first layer of the web of material is wrapped around the winding core. Furthermore a filling hopper (67) is arranged above the hollow winding core (32) to accept the free-running packing material (11). A sealing device (51, 52) and a cutting device (51, 62) are arranged below the winding coil (32). The drive device (36) for withdrawing the web of non-woven material (23) takes the form of a recirculatingly driven endless belt (37) arranged transverse to the axis of the winding coil (32) and at an angle corresponding substantially to the feed angle of the web of non-woven material, and running at a wrap-around angle of approximately 360° around the winding core (32) on top ofthe web of non-woven material (23).

Description

21~5125 The present invention relates to a packing unit for filling cavities in pacha~ ,o"l..~ , boxes, etc. in order to hold packaged items securely in place. The invention also relates to a device for manufacturing such packing units 5 In a packing unit of this type, which is known from W090/08709, the casin~q or wrapper is made from a paper web whose helically arranged longitudinal edges are ~lued together with each other and whose two ends are closed in the manner of a sack. The device for manufacturing such a packing unit is also known from W090/08709 and it consists of a station 10 for applying adhesive to one side of the longitudinal edges of the paper web, a relatively complex drive ll~e-,l,a";;.", for arranging the paper web in ahelical configuration around the winding core and, below the winding core, a co",, " ~d device for producing the bag-type closures by wrapping and securing a Glosure tape around the ends of the packing units. Quite apart 15 from the fact that a sausage-shaped packing unit of this type is not suitablefor filling all conceivable types of cavity, it also requires a great deal of not always justifiable manufacturing effort to produce, for example applying adhesive to the ed~es of the web and tying off the ends in the manner of sacks.
20 It is therefore an object of the present invention, on the ona hand, to create a packing unit of the type ~,e"Lioned at the beginning which has a more favourable shape and is easier to manufacture and, on the other hand, to create a device requiring fewer and less complex col"poner,Ls to manufacture a packing unit of the type mentioned at the beginning.
25 In general terms, the invention provides, in one aspect thereof, a packing unit for filling cavities in packaging co~ ~ - ,er~, boxes, etc. is providcd in order to hold items securely in place, the unit having a casing consisting of a web of material and formed in the manner of a wound tubular roll, and filled with free-running packing material. In accordance with the invention, 30 the web of material takes the form of a web of prt~ laLJly biodegradable `` 21~512~

non-woven material which is i"" ,~y"~ed s~.l,sk",i' '~y over its entire surface with a heat-sealable bonding agent.
In another aspect but still defining the invention in general terms, a device for manufacturing packing units formed as described in the preceding 5 paragraph, having a pr~:r~:ldbly vertically oriented hollow winding core with a feed Illd~,llall;~ for feeding the web of material, said ",ecl,a~ ", being oriented at a given angle to the axis of the winding core, and having a drive ",~,I,an;~"" to withdraw the web of material from the feed device and for wrapping the web of material around the winding core (32), and having also 10 a device for joining the overlapping longitudinal edges of the web of material in the area where the first layer of the web of material is wrapped around the winding core, and having also a fill hopper arranged above the hollow winding core to accept the free-running packing material, and having a sealing device snd a cutting device arranged below the windiny coil, 15 According to the invention, the drive device for v~:llldlt.~i.lg the web of non-woven material takes the form of a recirculatingly driven endless belt arranged transverse to the axis of the winding coil and at an angle co",:".on ' ,9 s~ .Lc", "y to the feed angle of the web of non-woven material, and running at a wrap-around angle of aprj~.d~r,c,l,,ly 360 around 20 the winding core on top of the web of non-woven material.
Thanks to the measures provided according to the invention for the manufacture of the packing unit, the web of material can be bonded in any desired fashion to form a spiral-wound roll and in particular the ends of this wound tubular roll can be bonded together in any desired way. Since the 25 non-woven material is il)~ yllclldd with a heat-sealable bonding agent it makes no dirr~,~nce which of the sides of the web material forms the inner or outer side of the bond. The strength of the non-woven material can be adjusted within certain limits by the heat-sealable bonding agent. In the device used according to the invention to produce such packing units the 30 web of non-woven material is already i"",,~y"~led with heat-sealable bonding agent, so that a station for supplying adhesive is not needed.
h" II,e""o,t" by using the structurally simple and cost-effective endless belt, ` 21~512~

the non-woven material can be helically wrapped around and moved alony the winding core.
According to another feature of the invention, the spirally arran~ed longitudinal edges of the web of non-woven material overlap and the ends 5 of the casing are brought together and bonded in a flat, narrow strip by the a~F' 1 of heat and pressure.
With the aid of further features of the invention, a packing un~t is obtained which can be closed in a simple manner at both ends. This type of closure is not possible with the prior art ~e- l,nolouy referred to above because the 10 paper web used in that case is coated with adhesive only on the inner or outer side and it is prd..; 'Iy i", ~ '~ to apply the adhesive on the inside of the wound tubular roll.
The web can be made of a number of different materials, such as a non-woven, woven, or knitted material. The non-woven material has a weight 15 per unit area of 5 to 100 g/mZ. The non-woven material may consist in particular of oxygen-bleached cotton, ground-up wood, or the like. The bonding agent may contain 10 to 40% of a l,;~deu,ada~ adhesive. It may also consist of natural materials or synthetic resin. rl~1r~,ably, th~ packing unit of the invention is c~""~ aL,le.
20 The bonding agent may be applied, for example, by spraying or i"""e,2,i~
by pressing it on, or by applying it in the form of fine particles. The bonding agent does not develop its bonding capability until it is heated under pressure to a certain temperature. In this way it is possible for the casing material to be compactly stored and ~ "~.o~ d as an ill~ I,,edic,~ product, 25 prior to manufacture of the packing unit, with the bonding agent already applied to the non-woven material and without the individual layers sticking to each other.
In âccordance with another variant of the invention the casing consists of one or more layers of non-woven material so that, depel~ ~y on the ` 2145125 stresses to which the packinr~ unit is expected to be exposed when used as an elastic filler in packing containers, boxes, and similar, a suitably robust outer skin or casing can be provided. The two or more layers can, for example, be joined to each other at a plurality of points by means of the 5 applied bonding agent.
The free-running packing material is advantageously produced from a material which has already been used in another manner, for Qxample as c~(dL,oa,~ or boxboard, and thus can be put to another use before it is finally destroyed, for example by recycling. This cost-effective i~L~nedidL
10 use of an already used material does not interfere with any later recycling process, so that the free-running packing material can therefore be cheaply produced because ess~"Li~l'y the only investment required is in the machines needed to produce it. This free-running packing material is also envi,u"",~"L~lly friendly because it does not use any raw materials per se.
15 The optimally pl~dt:L~IIll ,ed increase in bulk volume, which is uniformly distributed over sub~Ldll; "y the entire longitudinal and transverse ." "el~sio"s of the chips, has the advantage that the free-running chips of packing material will absorb impacts, shocks and vibrations in the same way, regardless of their random position within the casing and thus inside a 20 packing container. It is further possible to add to the cardboard chips a small pe,c~"Ld~e of paper strips, for example of the kind that are obtained when documents are shredded.
Depending on the width of the web of non-woven material and the overlap, a certain angle of i,,~,l;,,~Liun, p,t:r~r~ly of about 15, is preset for the feed 25 of the web. The overlapping, longitudinal edges of the web are bonded together, in a manner which is simple both in terms of design and manufacture, by means of a heatable pressure roller which is ~ rt~ bly driven at a circ~""rt~ "Lial speed which matches that of the web feed.
Because of the bondin~ agent with which the web of non-woven material 30 has been pre-i,,,p,~ L~d, it is also possible without any difficulty, using the device described, to close the ends of the wound tubular roll by means 21~512~

of straight hcat -- " ,9 jaws. Advantageously, during this heat-sealing process the wound tubular roll is separated between these two pairs of heat-sealing jaws so that simultaneously, on the one hand, the already filled section of wound tubular roll is also sealed at its other end and, on the other 5 hand, the next section of wound tubular roll to be filled is also sealed at its bottom end. The individual sections of wound tubular roll are filled in batchwise fashion without having to interrupt the winding process.
Further details and enlhQ "~"l~ of the invention may be taken from the following description, in which the invention is explained and described in 10 more detail on the basis of the embodiment depicted in the drawing, which shows:
Figure 1: A dia~lallllllalic~ partially cutaway side view of a device for producing packing units according to a preferred embodiment of the present invention.
Figure 2: A partially cutaway view along line ll-ll in Figure 1.
Figure 3: A partially cutaway view along line lll-lll in Figure 1.
Figure 4: A view of the packing unit as indicated by the arrow IV
in Figure 1.
Fi~ure 5: A section along the line V-V in Figure 4.
Figure 6: A perspective view of a free-running packing material in the form of ca,dl,oa,~l chips, as contained in the packing unit according to Figures 1, 4 and 5.
The cardboard chip 11 shown in perspective view in Figure 6 is of knowntype and is made of packaging c~,.ll,oa,d. It is, for example, about 40 x 50 25 mm in si~e. A plurality of such chips form a free-running packing material 214al2~

and are manufactured from single-ply cardboard of the type normally used for cardboard boxes and packaging purposes, which is constructed of two outer layers of paper or cardboard 12, 13 with between them a sandwich layer of corrugated ,a,~uoa~d 14. It goes without saying that other types of 5 pa~ ,9 cardboard, in particular also thicker, e.g. two-ply or multi-ply packaging ca"~oa,d, or simple types of ..a,duoa~d may be used for this purpose. Fl~rl:r~nce is given to using packing chips 11 made from used or waste .,ard~oa,d material. To increase its bulk volume by about 20%
compared with a flat piece of cardboard of the same di,,,el,s;ul1s, the chip 10 1 1 illustrated here pocsesses recesses 16 and peaks 17 arranged in an ap~ru~ilyldluly uniform matrix in such a Wây that each recess 16 in the one surface of a chip 11 col,~s,uo~1ds to a matching peak 17 p,u;~.,li~g from the other surface of the chip. In each case, a plurality of such pairs of recesses/peaks 16, 17 are arranged in parallel rows, and the orientation of 15 these recesses or peaks is reversed from row to row. While in one row the peaks project above one of the surfaces, in the other row they project above the other surface. In a direction transverse to the c~rur~r~e~ ned rows, each of which is made up in the same way of recesses 16 and peaks 17, one recess is followed by one peak in the same surface, then there 20 comes another recess followed by another peak, and so on. It is understood that the recesses 16 and the peaks 17 may also be offset in relation to each other in the stated transverse direction and also that the chips 11 need not be only rectangular in shape, as depicted, but may also have any other desired geometrical shape.
25 According to the Figures 4 and 5 a plurality of packing chips 11 is combined together into a packing unit 20 in such a manner that this plurality of packing chips 11 is loosely filled into a casing 21 sealed at both ends. The casing 21 has the shape of a wound tubular roll 22 formed by a helically wound web of non-woven material 23 of a certain width, wherein the 30 adjacent longitudinal edges 24 and 25 of the web of non-woven material 23 overlap each other and are firmly joined at the overlap 26. The two ends of the wound tubular roll 22 are pressed together, parallel to each ûther in a transverse straight line and are firmly joined with each other, thereby 214312~

forming a strip-shaped closure edge 27, 28. The casing 21 is rclatively loosely filled with packing chips 11 so that, as the packing chips 11 slide around inside the casing 21, the packing unit 20 can adapt its shape to the prevailing circumstances. In acco,.ld~ce with a variant of the invention, it is 5 also possible to add paper strips, of the kind produced by a document shredder, to the cardboard chips 11 in the casing 21, but in a very much lower proportion than the chips. Figure 4 shows that, because of its loose degree of filling, when it is Iying down the wound tubular roll 22 assumes an oval cross section. It is also possible to produce the casing 21 by 10 winding it from a two-ply or multi-ply web 23.
For the web 23 a non-woven material is used which is il"~ ndl~d over its entire surface with a bonding agent. This bonding agent is thus spread over and inside the entire fabric of the non-woven material; this is achieved by i"""e,~ the non-woven material in or spraying it with the d~plUpridle 15 bonding agent. The latter is a heat-sealable adhesive which is activated by pressure and temperature to form a bond. In this way the longitudinal edges 24 and 25 are firmly joined together and also the two closures of the web of non-woven material, namely the upper and lower closure strips 27 and 28, are formed. The b;o~ ld~abl~ web material is of non-woven, woven, 20 knitted, or similar construction; it may have a weight per surface area of 5 to 100 g/m2 and it consists in particular of oxygen-bleached cotton, ground-up wood, or similar. The bonding agent, which may be produced from natural substances or from synthetic resin, may contain between 10 and 40% of a bi~lo$,ic~"y dr-~lddabl~ adhesive.
25 Figures 1 to 3 show a device 31 for manufacturing wound tubular rolls 22, for filling the wound tubular rolls 22 with cdldboal~i chips 11, possibly with the addition of paper strips, and for sealing both ends of the wound tubular roll 22 after it has been filled, i.e. for continuously manufacturing complete packing units 20.
30 The facility 31 is provided with a vertically arranged, hollow winding core 32, which is fixed and non-rotating. A feed ",ecl,dni~", 33, which is not ~ 2~ 2~
shown in full detail, for the web of non-woven material 23 which is withdrawn from a roll, also not shown here, is arranged at an angle of <90 to the axis of the winding core 32 (the web comes at angle from the top right in Figure 1~. The feed 33 ill.,Or,l,ordlt:s guide or deflector rollers5 arranged in various planes. The web of non-woven material 23, which is fed to the outer circumference of the winding core 32 at an acute angle of, for example, 15 to the horizontal, is v~iLlldlc~ l by a drive or withdrawal device 36 from the roller, which is not depicted here, and ~lal l~,uOl II:d axially along the length of the winding core 32. At a point along the direction of 10 feed 33, i.e. ahead of the winding core 32, a printing station 34 with a printing roller 35 is provided so that the web of non-woven material 23 can be printed with advertising text, a de~,ldldLioll of the contents, etc.
The drive ",eclld";~", 36 pos~ses a recirculating belt 37 which is p,~ r~,dbly not as wide as the web of non-woven material 23. This endless, 15 recirculating belt runs around two guide rollers 38 and 39 arranged on opposite sides of the winding core 32 with their axes oriented pe",el ' '^~
to the axis of the winding core 32, and one of these two guide rollers, for example roller 38, is motor-driven. The guide rollers 38, 39 are oriented parallel to each other and are offset in height with regard to each other in 20 such a way that the imaginary line joining them is also inclined at about 15 to the horizontal and thus the resulting direction of the belt 37 is sub~Ldll~' "y identical to the direction of the web of non-woven material 23 being fed into the machine. Starting at the right-hand guide roller 38 shown in Figure 1, the slightly less inclined strand 41 of the belt 37 wraps itself 25 s~b:~La~ y by about 360 around the winding core 32, runs downwards at an angle on the core, then the departing section 42 of the belt continues on to the other guide roller 39, from which the return belt section 43 is taken back to guide roller 38, past the winding core 3Z and pl~:f~51ably without coming into contact with it. The belt 37 is driven in this direction B
30 and in the opposite direction B', which have just been described, and thus parallel to and in the same direction as drive direction A of the web of non-woven material 23. The belt 37 wraps itself on winding core 32 while running over and on top of the web of non-woven material 23. Through this 2~4al~

contact between the belt 37, which arrives at an angle and is wrapped around the core at an angle, and the web of non-woven mater~al 23 on the winding core 32, the web 23 is forced to move in a spiral path around the winding core 32 and is simultaneously Lld~ls~,o, l~d downwards on the core, 5 as is eYident from Figure 1.
Between the point at which the web of non-woven material 23 is fed to the winding core 32 on the one hand, and the drive ",eclla"i~", 36 on the other, i.e. after the web has passed through a wrap-around angle of 360 after leaving the feed-in point, a device 46 is provided in the upper section of the 10 frame 44, to which the drive device 36 is also attached, for the purpose of joining together the overlapping longitudinal edges 24 and 25 of the web of non-woven material 23; the said device 46 coil",,is~s a heated pressure roller 47 whose axis of rotation 48 is arranged sul, lldl lli":ly pe",~ ,ular tothe direction A of the web of non-woven material 23 as it is being fed. The 15 pressure roller 47 is rotatingly driven by a motor 49. The circu",rt:,t,,llial speed of the pressure roller 47 cu"~,onds suLJ ~lanl~lly to the speed at which the web of non-woven material 23 is fed or transported to or around the winding core 32.
After the web 23, which is now joined at the longitudinal edges 24 and 25, 20 has passed through another wrap-around angle of applwdlllal~ly 360, the drive ",~clla"is", 36 or the endless recirculating belt 37 comes into contact with the web of non-woven material 23 and lldll:.po, l~ the unfilled section of wound tubular roll 22', which has been manufactured in this way, along the winding core 32 until it projects beyond the lower end of the windin~
25 core 32 and arrives at a combined sealing/cutting device 51. The latter device is attached to a lower section of the frame 44 and possesses a sealing unit 52 con ,;;,Li"g of two pairs of sealing jaws 53 and 54 arranged one above the other, with straight sealing jaws 55 and 56 or 57 and 58 arranged opposite each other on both sides of the unfilled section of wound 30 tubular roll 22', and these sealing jaws are moved synchronously towards and away from this unfilled section of wound tubular roll 22' along longitudinal guides 59, 60 as indicated by the double arrows C and D. The 21~5~2-~

sealing jaws 55 to 58 arranged pe",en.l;~lar to the axis of the winding core 32 and pe" end;~ular to their horizontal ~uides 59, 60, are heated and, for example usin~ hydraulic force, they press together the web of non-woven material 23 forming the unfilled section of wound tubular roll 22' at two 5 points spaced vertically a short distance apart so that, once the sealing jaws 55 to 58 are activated, the upper closure edge 27 of the already filled section of wound tubular roll 22 and the lower closure edge 28 of a still unfilled section of wound tubular roll 22' are simultaneously produced.
While the sealing jaws 55 to 58 are being activated and thus the two 10 closure edges 27 and 28 are being manufactured under the ~ " n of heat and pressure, a cutting unit 62 forming part of the combined sealin~/cutting device 51 and operatin~ between the two closure edges 27 and 28 separates the unfilled scction of wound tubular roll 22' from the finished section of wound tubular roll 22 ahead of it. For this purpose, the 15 cuttin~ unit 62 po~se,,es a knife 63 which is movable back and forth as indicated by the double arrow E parallel to the directions C and D of the sealing jaws 55 to 58. After the sealing unit 52 is opened, the finished packing unit 20 drops down, for example onto a conveyor belt. The lower end of the unfilled section of wound tubular roll 22' is transported further 20 downwards in a vertical direction beyond the end of the hollow winding core 32, and while this is happening it is filled through the centre of the winding core 32 with packing chips 11.
The packing chips 11 are supplied via a fill hopper 67 which is con,)e~;L~:d with the hollow winding core 32, and between the hopper 67 and the 25 winding core 32 is arranged a metering conduit 66 with a metering unit 65.
The meterin~ unit p~sse~-~s for example an upper and lower metering flap 68, 69, and the distance between the two flaps can be adjusted for different amounts of chips, and between the two flaps the amount of ca,dl,oa"l chips 11 to be filled into the section of wound tubular roll 22' is 30 dt,l~"l,i"ed and measured out. Once the next section of wound tubular roll 22' coming after the finished packing unit 20 has been filled to a predetermined level, the part of the wound tubular roll 22' which is above 2145~25 the fill level enters the combined sealin~/cuttin~ devicQ 51. There th~
sealing and cutting ~, ucess~s described above are repeated.

Claims

1. A packing unit for filling cavities in packaging containers, boxes, etc. in order to hold items securely in place, having a casing consisting of a web of material and formed in the manner of a wound tubular roll and filled with free-running packing material characterized in that the web of material takes the form of a web of preferably biodegradable non-woven material which is impregnated substantially over its entire surface with a heat-sealable bonding agent.

2. A packing unit according to Claim 1, characterized in that the spirally arranged longitudinal edges of the web of non-woven material overlap and the ends of the casing are brought together and bonded in a flat, narrow strip by the application of heat and pressure.

3. A packing unit according to Claim 1, characterized in that the web is made of a non-woven, woven, or knitted material, or similar.

4. A packing unit according to one of the foregoing Claims, characterized in that the non-woven material possesses a weight per unit area of 5 to 100 g/m.

5. A packing unit according to one of claims 1, 2 or 3, characterized in that the non-woven material consists in particular of oxygen-bleached cotton, ground-up wood, or similar.

6. A packing unit according to one of claims 1, 2 or 3, characterized in that the bonding agent contains 10 to 40% of a biodegradable adhesive.

7. A packing unit according to one of claims 1, 2 or 3, characterized in that the bonding agent consists of natural materials or synthetic resin.

8. A packing unit according to one of claims 1, 2 or 3, characterized in that it is compostable.

9. A packing unit according to one of claims 1, 2 or 3, characterized in that the casing is made up of one or more layers of non-woven material.

10. A packing unit according to one of claims 1, 2 or 3, characterized in that the free-running packing material consists at least substantially of chips made from cardboard, and in particular from packaging cardboard, which are formed by cutting preferably used packaging cardboard both lengthwise and crosswise, and the bulk volume of such chips is increased by providing copings and/or bent-over portions and/or peaks and/or recesses

11. A packing unit according to Claim 10, characterized in that the increase in bulk volume of the packing chips is brought about by providing oppositely oriented peaks and recesses alternating in position from row to row in a substantially uniform matrix.

12. A packing unit according to Claim 10, characterized in that the increase in bulk volume is in the range of 20% and the packing chips are in the size range of approximately 40 x 50 mm.

13. A device for manufacturing packing units formed according to at least one of the Claims 1 to 12, having a preferably vertically oriented hollow winding core with a feed mechanism for feeding the web of material, said mechanism being oriented at a given angle to the axis of the winding core and having a drive mechanism to withdraw the web of material from the feed device and for wrapping the web of material around the winding core and having also a device for joining the overlapping longitudinal edges of the web of material in the area where the first layer of the web of material is wrapped around the winding core, and having also a fill hopper arranged above the hollow winding core to accept the free-running packing material and having a sealing device and a cutting device arranged below the winding coil characterized in that the drive device for withdrawing the web of non-woven material takes the form of a recirculatingly driven endless belt arranged transverse to the axis of the winding coil and at an angle corresponding substantially to the feed angle of the web of non-woven material, and running at a wrap-around angle of approximately 360° aroundthe winding core on top of the web of non-woven material

14. A device according to Claim 13, characterized in that the angle of inclination of the web of non-woven material or of the endless belt is about 15° to the horizontal.

15. A device according to one of Claims 13 or 14, characterized in that the device for joining the overlapping longitudinal edges of the web of non-woven material consists of a heatable pressure roller.

16. A device according to Claim 15, characterized in that the axis of the pressure roller is arranged approximately vertical to the direction of the web of non-woven material.

17. A device according to Claim 15, characterized in that the pressure roller is driven synchronously with the speed at which the web of non-woven material is fed.

18. A device according to one of the Claims 13, 14, 16 or 17, characterized in that the sealing device consists of upper and lower pairs of straight heat-sealing jaws and further characterized in that the opposite jaws of each pair can be moved towards each other.

19. A device according to Claim 18, characterized in that the cutting device is arranged between the upper and lower pairs of heat-sealing jaws.

20. A device according to Claim 18, characterized in that the two pairs of heat-sealing jaws are synchronously movable.

21. A device according to Claim 19 or 20, characterized in that the cutting device can be activated during the heat-sealing cycle of the pairs of heat-sealing jaws.

22. A device according to one of Claims 13, 14, 16, 17, 18, 19 or 20, characterized in that a metering device for controlling the filling level isarranged between the fill hopper and the hollowing winding core.

23. A device according to one of Claims 13, 14, 16, 17, 18, 19 or 20, characterized in that a printing station is arranged in the area of the web feed device.