DE102018110595A1 - Method and device for producing a packaging cushion - Google Patents

Abstract

Described is a method for producing a resilient packaging pad (10) from a flat material web (2). In the method, the two-dimensional material web (2) with a predetermined feed (v) in a along a longitudinal direction (l) of the material web (2) extending feed direction (R) withdrawn from a supply (3), conveyed by a transport roller unit (5) and in a in the feed direction (R) on the transport roller unit (5) following stowage device (6) transported. The flat material web (2) is thereby guided, at least during the advance (v), by the transport roller unit (5) by means of guide devices (7) provided for this purpose. In a longitudinal direction (l) extending and in a transverse direction (q) of the material web (2) over a first section width (b1) extending first web section (2.1) of the material web (2) by means of the transport roller unit (5) in the transverse direction (q ) oriented transverse fold lines (FQ), whereby a directional, accordion-like first fold (F1) is generated with a first elastic restoring force. The material web (2) is compressed during the feed (v) by the guide means (7) and / or accumulating means (6) in the transverse direction (q). Further, in the storage device (6) a predetermined, the feed (v) counteracting back pressure (p) on the web (2) and the web (2) in the storage device (6) by an interaction of feed (v) and back pressure (p) stowed in the longitudinal direction (1), such that in at least one second web section (2.2) of the material web (2) extending in the transverse direction (q) of the material web (2) over a second section width (b2) has an irregular second fold (FIG. F2) is produced with a second elastic restoring force and the material web (2) is thereby permanently deformed to form a packaging pad (10).

Description

Technical area

The invention relates to a method and an apparatus for producing a packaging pad as well as to a packaging pad produced according to the method.

State of the art

Packaging pads, which are also referred to as filling material, are well known. Such packaging pads are, for example, shaped articles made, for example, of a foamed polystyrene or balloon-like, inflatable bodies of thin film filled with air. Environmentally compatible variants are made for example of paper.

Also known from the prior art are smaller filler particles known to be made of pulp, especially paper. For example, the DE 43 02 316 C1 a method in which the Füllmaterialteilchen are made of a sheet-shaped or strip-shaped material. For this purpose, strips of laminated paper are glued together and from the glued laminated paper are produced by cutting and deforming the Füllmaterialteilchen. The disadvantage must be handled with this method with glue. Furthermore, the glued laminated paper must be heated to deformation, whereby the energy consumption during manufacture is adversely affected.

For example, the GB 2 508 267 A an apparatus for producing packaging pads, with which a packaging pad can be made from a laid-up in several layers of paper web. With the device of GB 2 508 267 A the layers of the paper web arranged on top of one another are provided with a predetermined fold and are crumpled together in the longitudinal direction by means of an acting compression that the paper web laid in several layers is permanently deformed into an air-filled cushion. The air-filled cushion is formed substantially in the form of a double cushion, in which a central portion is provided with the convolution that the individual layers of the paper web are connected to each other in this central portion of the fold and formed on both sides of this central portion each have a cushion is.

Another method for producing a paper pad from a single-ply paper web is the DE 198 58 537 A1 in which the paper web is deformed wave-shaped and then jammed or crumpled in a jam channel to form a packaging pad.

In the case of the known packaging upholstery, there is often the problem that, in particular in the case of environmentally compatible design, for example in the form of paper packaging upholstery, the production process is often complicated to produce packaging upholstery which has a damping or cushioning property corresponding to the desired requirements. Despite the known from the prior art solutions, therefore, there is still a need for packaging pad, which have a good damping effect and in particular are simple and inexpensive to produce.

Presentation of the invention

Object of the present invention is therefore to provide a method for the production of packaging pads available, which overcomes the disadvantages of the prior art and which allows for low cost and in a particularly simple way the cost-effective and simple production of packaging pads with an improved cushioning effect. This object is achieved by the method according to independent claim 1. An apparatus for the production of packaging pads is the subject of claim 11. A corresponding packaging pad is the subject of claim 18. Further advantageous aspects, details and embodiments of the invention will become apparent from the dependent claims, the description and the drawings.

The present invention provides a method for producing a packaging pad from a sheet of sheet material. In the present method, the flat material web is withdrawn from a supply at a predetermined feed in a feed direction running along a longitudinal direction of the material web, conveyed by a transport roller unit and transported in a storage device following the feed roller unit in the feed direction. The flat material web is thereby guided at least during the feed by the transport roller unit by means provided for guide means. In a longitudinally extending and in a transverse direction of the web over a first section width extending first web portion of the web transverse folds are introduced by means of the transport roller unit, which are oriented in the transverse direction, whereby a directed, accordion-like first convolution is generated with a first elastic restoring force. In this case, the material web is compressed during the feed by the guide devices and / or accumulating device in the transverse direction. In the storage device, a predetermined, the feed counteracting dynamic pressure is exerted on the web and the material web is in the storage device through an interaction of feed and dynamic pressure jammed in the longitudinal direction, in such a way that in at least one extending in the transverse direction of the web over a second section width second web portion of the web an irregular second fold with a second elastic restoring force is generated and the material web thereby forming a Packaging cushion is permanently deformed.

Advantageously, a packaging pad can be produced with the present method with little technical effort, which in particular due to the different folds in the individual web sections has an advantageously improved elasticity property and thus can cause improved damping or padding.

In the present case, a material web is understood to mean a sheet-like, thin and sheet-like material which, for example, is wound around its length essentially as a continuous web on a roll. In particular, a "sheet-like" material web is to be understood here as meaning that the longitudinal sides or longitudinal edges of the material web are opposite one another and thus not adjacent or in the immediate vicinity with respect to a longitudinal axis which is received in a material web plane and extends in the longitudinal direction of the material web are arranged. The longitudinal edges of the flat material web are therefore not in contact with each other and are in particular unconnected. A flat material web is thus formed in particular by a single-ply material web. In particular applications, the material of the web may also include a coating, such as a coating, which provides improved adhesion or tack to the surface or which renders the material more resistant or stiffer.

According to the present understanding, a packing pad is to be understood as a shaped body or padding body or packaging filling material or packing filling material whose elastic or spring-elastic property is mainly due to the first and second folding in the material of the flat material web. A cushion or packaging cushion in the present sense is thus a resilient body or packaging body or filler whose cushioning, elastic property is a consequence of the introduced into the sheet material web folding structure. The packaging cushion in the present sense is thus formed by a material body or molded body and not by an inflatable hollow body, in which only the envelope surrounding the air-filled cavity is formed from the material web.

In the present case, the flat material web is made available as a supply, preferably as a roll product, on a roll, so that the material web for carrying out the present process can be withdrawn from the supply, in particular from such a roll. When the material web is removed from the supply, the material web in the longitudinal direction, which corresponds to a feed direction or running direction of the material web and can also be referred to as the transport direction, is slightly tensioned and, for example, also stretched depending on the properties of the material of the material web. The transport roller unit exerts the necessary for the removal of the web tension. In the feed direction behind the transport roller unit can thus be canceled, for example, the clamping or stretching effect.

The material web is conveyed with the feed in the feed direction by the transport roller unit and transported to the transport roller unit following congestion device, wherein the material web is guided at least during transport through the transport roller unit of the guide device. In the storage device, a predetermined, the feed counteracting dynamic pressure is exerted on the web. Thus, in the accumulation device on the one hand the feed in the feed direction and on the other hand at the same time against the feed direction oriented dynamic pressure acts on the material web, which eventually leads to congestion or compression or compression of the web in the longitudinal direction. As a result, the web is stowed or compressed in the storage device by the interaction of feed and back pressure lengthwise and thereby permanently deformed to form the packaging cushion. Due to the simultaneous guidance of the material web by means of the guide device advantageously a setting or jamming or jamming of the material of the web between the transport rollers and, for example, a wall of the storage device is prevented. Also, both the intended compression in the transverse direction as well as the introduction of the second fold can be done optimally.

The material web is compressed during the feed by the transport roller unit and / or by the storage device also in the transverse direction, namely transversely to its length. For example, this can already be effected during the introduction of the first fold by the transport roller unit, but in particular also simultaneously with the introduction of the second fold. It is for example possible to set a passage width through the storage device so that the crowding transversely to the longitudinal direction and, concomitantly, the introduction of the second fold by an interaction of back pressure and Friction arises. In particular, the guide device makes a significant contribution to the success of the compression in the transverse direction.

For example, the material web used may have a width in a range of 75 mm to 300 mm, preferably a width in a range of 100 mm to 200. Particularly preferably, the material web may have a width in a range of 120 mm to 180 mm and particularly preferably of around 160 mm. Advantageously, the material web is compressed during the feed by the transport roller unit and / or by the storage device to about 60% to 70% of its width. For example, the flat material web before entering the device has a width in the transverse direction of 160 mm and the finished elastic packaging pad has, after leaving the device, a pad width in the transverse direction of about 100 mm.

The first fold, which is introduced in the first web section extending over the first section width of the material web, can be understood as a directed, substantially regular folding or folding, whereby a concertina-like structure is formed in the material web. The second fold, which is introduced in the second web section extending over the at least second section width of the material web, can be understood as an irregular folding or as a gathering or collapsing. By both folds, the material web is thus shortened or compressed in the longitudinal direction or its length as well as in the transverse direction to form the packaging pad. Back pressure and feed are preferably adapted to each other so that a desired storage degree or a desired degree of folding takes place, the web always undergoes a sufficient feed through the storage device and thus formed from the material web, permanently deformed packaging pad finally by means of the feed an outlet end of the storage device is transported out of this. The packaging pad is thus manufactured as an endless packaging pad and can be cut to length as needed. Preferably, the permanently deformed packaging pad can be cut after leaving the storage device by means of a provided, downstream in the feed direction of the storage device cutting device.

With the present method, a need-based production of packaging pads is particularly advantageous. The method offers an especially fast, cost-effective and easy way to produce packaging pads at the time of the need and exactly in the required amount if necessary. The packaging pad produced by the method advantageously has good elasticity properties and a large restoring force and a resilient effect. In addition, the packaging pad has a relatively low specific weight.

The introduction of the first fold preferably takes place in such a way that it extends over approximately 10% to 30% of the width of the material web, preferably over approximately 15% to 20% of the width of the material web. In the finished state of the packaging pad, in particular after compression or compression in the transverse direction, the area provided with the first fold can thus occupy, for example, approximately one third or approximately half the width of the packaging pad.

With the present method, the irregular, second fold is also preferably introduced in a third path section of the material web extending over a third section width in the transverse direction of the material web, with the first path section preferably being arranged between the second and third path section. Thus, a first region extending in the longitudinal direction of the material web is preferably produced with the first fold, which adjoins both sides of an outer region or edge-side region with the second fold. As a result, the elastic properties of the packaging pad can be improved and in particular optimally adapted to their use.

In the generation of the irregular second fold in the second and preferably third web section, inclined fold lines are preferably introduced which run at an acute angle to the longitudinal direction of the material web and have a different orientation from the orientation of the transverse fold lines of the first fold in the first web section. Particularly preferably, the transverse fold lines are introduced in the first web section in such a way that they run essentially perpendicular to the longitudinal direction of the material web. The oblique fold lines in the second and preferably third track section are for example introduced in such a way that they run approximately at an angle of approximately 45 ° to the longitudinal direction of the material web.

According to a preferred embodiment variant, a paper web is used as material web. As a result, in particular environmentally friendly packaging pads can be produced in the simplest way with the present method. The paper web may be formed by any paper suitable for use in the process. When choosing the paper for the paper web is to make sure that the paper has the necessary stiffness, so that the permanently deformed packaging cushion has a desired, sufficient elasticity. At the same time, the paper advantageously has the lowest possible weight as well as the smallest possible thickness. The paper of the paper web preferably has a weight per unit area in a range from 30 g / m ² to 100 g / m ² and particularly preferably in a range from 40 g / m ² to 80 g / m ² , particularly preferably around 50 g / m ² on. For example, the paper web may also be formed by a packaging paper, in particular tempered paper.

Particularly advantageously, the dynamic pressure in the stowage device is adjusted so that the material web for producing the permanently deformed packaging cushion is stowed along its length to about 70% to 50% of its length, preferably to about 60% of its length. With such a stowage wheel, the initially planar, planar shape of the material web changes to a cushion body with an average cushion height and a predetermined cushion volume, wherein the cushion body has a corresponding volume fraction of air due to the air enclosed in the folds. The volume fraction of air is preferably at least 50%, particularly preferably at least 60% and particularly preferably at least 70%. The volume fraction of air depends, for example, on the stiffness of the paper used in the paper web and on the dynamic pressure in the storage device used during the deformation.

According to a preferred embodiment of the invention, the back pressure is exerted by means provided at the outlet end of the storage device spring flap, wherein very particularly preferably a force of the spring flap can be adjusted to adjust the back pressure. The spring flap can be designed, for example, so that it counteracts the feed at an outlet end of the storage device and thus blocks the exit or the outlet of the formed from the material web packaging pad from the storage device to a certain extent. As soon as a feed pressure in the stowage device is greater than the force of the spring flap, it is pressed by the molded packaging cushion in the feed direction, whereby the outlet end of the stowage device is opened and the molded packaging cushion is transported out of the stowage device.

Particularly preferably, the first folding having a first elastic restoring force is generated by means of the transport roller unit prior to entry or during entry into the storage device, wherein, for example, the transport roller unit is formed by two interacting, intermeshing transport rollers in the form of toothed rollers, and the material web passed between the toothed rollers becomes. The toothing of the toothed rollers thus introduces the first fold into the material web. This can also be understood as preforming or first deformation of the material web and can also be referred to herein as pre-folding or pleating.

The present invention also includes an apparatus for manufacturing a packaging pad according to the method as described above. The device has at least one holding device for holding a supply of a material web, at least one transport roller unit for removing the material web from the supply and for transporting the material web with a predetermined feed in a feed direction and at least one in the feed direction of the transport roller unit following stowage device with an inlet end and an outlet end on. The device further comprises at least one guide device for guiding the material web, wherein the guide device is arranged in a transition region between the transport roller unit and the storage device and overlaps in the feed direction at least partially with the transport roller unit and the storage device. The transport roller unit is adapted to generate in a first web section of the material web a directed, accordion-like first fold with transverse fold lines oriented in a transverse direction of the material web. The storage device is configured to exert a predetermined, the feed counteracting dynamic pressure on the material web. The transport roller unit, the storage device and the guide device are designed and cooperate in such a way that they generate an irregular second fold in at least one second path section of the material web.

Preferably, the inlet end of the storage device facing the transport roller unit and partially overlapped in the feed direction with the transport roller unit. For example, the storage device comprises a pitot tube and the transport roller unit has two cooperating transport rollers in the form of toothed rollers, wherein the pitot tube at the inlet end has corresponding recesses for the engagement of the two cooperating transport rollers. In such an embodiment, the transport roller unit and the storage device engage each other, so that the material web is located during the feed or transport within a specific section both within the transport roller unit and within the storage device.

The pitot tube has a pitot tube diameter, which in the present case is understood as an inner diameter and a pitot tube length, which can also be referred to as a buffer length. For example, the pitot tube diameter is in a range of 60 mm to 100 mm and is preferably about 80 mm. The pitot tube length or buffer length can be between 180 mm and 250 mm, preferably between 200 mm and 230 mm, and is particularly preferably around 220 mm.

Each of the two cooperating transport rollers of the transport roller unit has a transport roller diameter and a transport roller width. For a transport roller diameter in a range of 130 mm to 170 mm, preferably 140 mm to 160 mm, and more preferably about 150 mm, the transport roller width is, for example, in a range of 20 mm to 50 mm, preferably 25 mm to 40 mm more preferably around 30 mm.

Preferably, the stowage device further comprises a valve disposed in the region of the outlet end of the pitot tube spring flap, wherein the spring flap is adapted to adjust the back pressure in the pitot tube and wherein the spring flap has a spring with adjustable actuating force. For example, the tensile force of the spring can be around 3 kg.

Particularly preferably, the guide means are formed as guide plates, wherein the guide plates extend at least over the transport roller diameter of the transport roller unit. The guide plates preferably extend beyond the transport roller unit. The guide plates are arranged at a predetermined distance from each other, wherein the distance of the guide plates between 25 mm and 45 mm, preferably between 30 mm and 40 mm and more preferably about 35 mm.

Particularly preferably, the guide plates each have a guide plate extension, so that the guide plates extend with the respective guide plate extension overall over a majority of the length of the storage device, in particular of the pitot tube, preferably up to the outlet end of the storage device. The guide plate extension may for example also in the form of spaced-apart plates, namely extension plates, be formed, which connect directly to the guide plates. The extension plates can, like the guide plates themselves, be aligned parallel to one another and arranged at the same distance as the guide plates. Alternatively, the extension plates can connect to them at an angle to the guide plates, for example, such that they extend obliquely to the outlet end of the storage device and the distance between the extension plates therefore increases steadily in the direction of the outlet end of the storage device.

In addition, a cutting device may be provided, wherein the cutting device is connected in the feed direction to the outlet end of the storage device.

For example, the present device may also have a foot switch for starting, and alternatively or additionally, an emergency stop switch. Preferably, the device may also be designed for continuous adjustment of the speed and / or have a soft start.

The invention also relates to a packaging pad produced by the method described.

list of figures

• 1 grob schematisch dargestellt eine Ausführungsform der erfindungsgemäßen Vorrichtung in einer Draufsicht von oben;
• 2 grob schematisch dargestellt die Vorrichtung der 1 in seitlicher Ansicht und
• 3 in grob schematischer und vereinfachter Darstellung Abschnitte der Materialbahn bzw. des daraus erzeugten Verpackungspolsters.

The invention will be explained in more detail with reference to embodiments in conjunction with the drawings. Show it

• 1 roughly schematically illustrated an embodiment of the device according to the invention in a plan view from above;
• 2 roughly schematically illustrated the device of 1 in lateral view and
• 3 in a roughly schematic and simplified representation sections of the material web or of the packaging pad produced therefrom.

Ways to carry out the invention

The 1 shows roughly schematically illustrated an embodiment of the device according to the invention 1 for producing a packaging pad 10 , Individual process steps of the present process for the production of the packaging cushion 10 are designated with Roman numerals and in the 1 indicated accordingly.

The device 1 extending along a major axis HA extends, comprises a holding device 4 for rotatably supporting a supply in the form of a roll 3 one provided as a roll and on the roll 3 wound flat material web 2 , The role 3 is from the holding device 4 rotatably supported such that an axis of rotation THERE the role 3 essentially perpendicular to the main axis HA the device 1 runs.

The device 1 also has a transport roller unit 5 on, which in the present example, two in the form of toothed rollers, cooperating transport rollers 5a . 5b includes (in 1 is just one of the transport rollers 5a visible, noticeable). The transport roller 5a is via a drive unit 8th directly driven and the corresponding transport roller 5b (please refer 2 ) is indirectly by means of a toothed belt or toothed belt, via the directly driven transport roller 5a driven. Out 2 goes by means of the arrows shown that due to the rotation of the transport rollers 5a . 5b in the direction of the arrow, unrolling or pulling off the material web 2 from the role 3 is effected.

The removal or unwinding of the material web 2 is denoted by I and is in the 1 for reasons of clarity in the area of the holding device 4 hinted, even if the "active pulling" of the material web 2 through the transport roller unit 5 is taught. One feed direction R the material web 2 , which can also be referred to as a transport or running direction, runs in the direction of the main axis HA the device 1 , The material web 2 is thus along a longitudinal direction I, namely its length in the feed direction R emotional.

As a material web 2 Preferably, a paper web is used, wherein the paper web, for example, a width b of about 160 mm and preferably consists of a paper with a basis weight of about 50 g / m ² .

When detecting the material web 2 , preferably paper web through the transport rollers formed as toothed rollers 5a . 5b the transport roller unit 5 be in the web 2 in one (in the 3 indicated) first track section 2.1 moving in a transverse direction q the material web 2 over a first section width b1 extends, in the transverse direction q oriented transverse fold lines FQ (please refer 3 ), whereby a first convolution F1 (please refer 3 ) is generated with a first elastic restoring force. This is especially due to the teeth of the meshing toothed rollers 5a . 5b causes. The production of this directed, accordion-like, first convolution F1 can also be understood as a preforming and is denoted by II and in the 1 in the area of the transport roller unit 5 indicated.

In the area of the transport roller unit 5 are management facilities 7 provided in the form of guide plates, which the material web 2 during the feed by the transport roller unit 5 and thus during the preforming or during the generation of the first convolution F1 to lead. The guide plates are arranged so that they are in or through a feed direction R the transport roller unit 5 following stowage facility 6 extend so that the material web 2 also during the entry or passage into the storage device 6 is guided by the guide plates. As a result, a setting or jamming of the material web 2 prevents and a linear feed in the feed direction R guaranteed. Furthermore, the web experiences 2 during the feed v through the leadership facility 7 and / or storage device 6 a compression in the transverse direction q ,

The material web 2 comes with a feed v in the feed direction R in the stowage facility 6 into transports. In the stowage facility 6 becomes a given, the feed v counteracting dynamic pressure p on the material web 2 exerted, in such a way that the material web 2 through interaction of feed v and dynamic pressure p their length l after being jammed. It is in at least one in the transverse direction q the material web 2 over a second section width b2 extending, second track section 2.2 (please refer 3 ) an irregular second fold F2 generated with a second restoring force. In the example shown is simultaneously in a third track section 2.3 moving in the transverse direction q over a third section width b3 the material web 2 extends, also the irregular second fold F2 generated with the second restoring force. The center along the material web 2 arranged, first track section 2.1 runs between the second and third track section 2.2 . 2.3 , respectively along the side edges or side edges of the material web 2 are arranged.

Finally, the material web 2 thereby forming the packaging cushion 10 permanently deformed. The jamming of the material web 2 and the consequent permanent deformation is denoted by III and in the 1 in the area of the stowage facility 6 indicated.

The stowage facility 6 of the illustrated example comprises a pitot tube 6b in the area of an entrance end 6 ' with the transport roller unit 5 overlaps and in the area of an outlet end 6 " with a spring flap 6a is provided. The pitot tube 6b has recesses into which the transport rollers 5a . 5b engage in rotation. An inner diameter of the pitot tube 6b For example, 80 mm, so that at a preferred width b the material web 2 of about 160 mm, a ratio between the inner diameter of the pitot tube 6b and width b the material web 2 at 1: 2. A length of the pitot tube 6b along the main axis HA the device 1 is for example 220 mm, the length of the pitot tube 6b can also be referred to as a buffer length.

The spring flap 6a presses with a predetermined force or spring force at the outlet end 6 " against the pitot tube 6b and blocks the expiration to a certain extent 6 " the stowage device 6 , This creates the dynamic pressure p which is opposite to the feed v is oriented. feed v and dynamic pressure p are so coordinated and set that a desired jam or a desired compression of the web 2 and at the same time the respective second convolution F2 in the second and third track section 2.2 . 2.3 is produced.

To generate the respective second convolution F2 in the second and third track section 2.2 . 2.3 become, for example, irregular Schrägfaltlinien FS (please refer 3 ) introduced with a longitudinal direction l extending longitudinal axis LA the material web 2 include an acute angle. The Schrägfaltlinien have in particular one of the in the transverse direction q extending orientation of Querfaltlinien FQ deviating orientation. For example, the Schrägfaltlinien run FS in the second and third track section 2.2 . 2.3 approximately at an angle of about 45 ° to the longitudinal axis LA the material web 2 ,

By the jamming of the material web 2 in the pitot tube 6b finally becomes the material web 2 staying with the packaging pad 10 deformed. Due to that due to the feed v continue into the pitot tube 6b introduced material rises in the pitot tube 6b in the direction of the feed v acting pressure on the spring flap 6a , which opens in the sequence and the packaging cushion 10 at the end 6 " dismisses. With coordinated feed v and dynamic pressure p , which in turn via an adjustable adjusting or spring force of the spring flap 6a can be adjusted, is a continuous production of the endless packaging pad 10 as well as its continuous discharge at the outlet end 6 " possible.

The device 1 can also be in the feed direction R behind or after the stowage device 6 arranged cutting device with a rotating cutting, with which the endless packaging cushion 10 can be cut or cut to length.

During the feed through the transport roller unit 5 , as well as the guiding and storage facilities 7 . 6 becomes the flat material web 2 among other things by the introduction of the folds F1 . F2 also in the transverse direction q compressed. For example, the material web 2 in the transverse direction q starting from an original width b the material web 2 of 160 mm on a cushion width b ' compressed by about 100 mm. It goes without saying that during compression in the transverse direction q every section width b1 . b2 . b3 the material web 2 on a smaller cushion section width b1 ' . b2 ' . b3 ' is reduced (see 3 ).

The dynamic pressure p in the stowage facility 6 is set, for example, that the material web 2 for producing the permanently deformed packaging cushion 10 in their length l accumulated at about 70% to 50% together. As a result, the initially planar, planar shape of the material web changes 2 to a cushion body having an average cushion height and a predetermined cushion volume, wherein the cushion body through the in the folds F1 . F2 enclosed air has a corresponding volume fraction of air. The volume fraction of air is preferably at least 50% and depends, for example, on the rigidity of the paper of the paper web used and on the dynamic pressure applied during the deformation p in the stowage facility 6 from.

In the 2 is again a side view of the device 1 of the 1 shown.

From the 2 shows that the trained in the form of guide plates guide devices 7 into the pitot tube 6b extend into it and thus at least in a transition region between transport roller unit 5 and stowage facility 6 are arranged. The guide plates 7 extend over at least one diameter d the transport rollers 5a . 5b and can about optimal guidance of the web 2 cause. The diameter d the transport rollers 5a . 5b is for example 150 mm. The transport rollers 5a . 5b preferably have the same transport roller width, wherein the transport roller width of each transport roller 5a . 5b preferably 30 mm.

In the example shown is following the respective guide plates 7 one the guide plates 7 in the feed direction R extending, directly to the guide plates 7 subsequent guide plate extension 9 indicated by dashed lines. This optional guide plate extension 9 may preferably until the end of the expiration 6 " the stowage device 6 extend and may for example also in the form of sheets, in particular extension plates, be formed. The extension plates 9 can, for example, in direct extension of the guide plates 7 be oriented parallel to each other and arranged at the same distance from each other, as the guide plates 7 yourself, which at a given distance a to each other. Alternatively, the extension plates 9 at an angle to the guide plates 7 connect so that the distance between the extension plates 9 for example, to the outlet end 6 " the stowage device 6 increasingly increased. The distance a between the guide plates 7 is for example about 35 mm.

The at the end 6 " the stowage device 6 on the pitot tube 6b attached spring flap 6a is at a top of the pitot tube 6b pivotally mounted or hinged and can by means of a pivoting or folding movement between an open and be moved closed position. The spring force or actuating force causes a closing movement of the spring flap 6a and counteracts the feed direction R which finally causes the back pressure p on the material web 2 is produced. As soon as the feed v or a feed force of the material web 2 and the packaging pad formed therefrom 10 in the pitot tube 6b the dynamic pressure p overcomes, the spring flap 6a by pressure in the feed direction R moved and thereby opened or unfolded. Finally, the finished packaging pad 10 the stowage facility 6 at the end 6 " leave.

The 3 shows in a roughly schematic and simplified representation in each case sections of the sheet material web 2 and the packaging pad produced therefrom 10 , The device 1 for the production of the packaging cushion 10 from the material web 2 is in 3 omitted for clarity.

Starting from the flat material web 2 as a single-ply web 2 provided and in this single-layer configuration the in 1 and 2 illustrated device 1 goes through the packaging pad 10 produced by permanent deformation. In the illustrated example, the finished package cushion 10 three in the transverse direction q adjoining sections, each of which each have a pad section width b1 ' . b2 ' . b3 ' extends. The over the centrally arranged first pad section width b1 ' extending first section has the first convolution F1 with the first restoring force, the first convolution F1 through transverse fold lines FQ is realized. On both sides of the first section further, each extending along an edge portions are arranged, wherein a second portion on the second cushion portion width b2 ' and a third section about the third cushion section width b3 ' extends. The second and third sections each have the second convolution F2 on, which in this case by Schrägfaltlinien FS is formed.

LIST OF REFERENCE NUMBERS

1

Device for producing a packaging cushion

2

web

2.1

first track section

2.2

second track section

2.3

third track section

3

stock

4

holder

5

Transport roller unit

5a, 5b

transport rollers

6

dam

6 '

incoming

6 "

expiring

6a

spring flap

6b

Pitot tube

7

guide means

8th

drive unit

9

Guide plate extension

10

packaging cushion

a

Distance of the guide plates

b

Width of the material web

b '

pad width

b1

first section width of the material web

b1 '

first cushion section width

b2

second section width of the material web

b2 '

second pad section width

b3

third section width of the material web

b3 '

third pad section width

d

Transport roll diameter

THERE

axis of rotation

F1

first folding

F2

second folding

FQ

transverse fold

FS

Schrägfaltlinien

HA

main axis

l

longitudinal direction

LA

Longitudinal axis of the material web

p

backpressure

q

transversely

R

feed direction

v

feed

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4302316 C1 [0003]
• GB 2508267 A [0004]
• DE 19858537 A1 [0005]

Claims (18)

Method for producing a resilient packaging pad (10) from a flat material web (2) in which the flat material web (2) is drawn off from a supply (3) at a predetermined advance (v) in a feed direction (R) running along a longitudinal direction (l) of the material web (2), conveyed by a transport roller unit (5) and conveyed in a following in the feed direction (R) on the transport roller unit (5) following stowage device (6) is transported, wherein the flat material web (2) at least during the feed (v) by the transport roller unit (5) by means provided therefor guide means (7) and wherein in a longitudinal direction (l) extending and in a transverse direction (q) of the material web (2) over a first section width (b1) extending first web section (2.1) of the material web (2) by means of the transport roller unit (5) in the transverse direction ( q) oriented transverse fold lines (FQ) are introduced and thereby producing a directional concertina-like first convolution (F1) with a first elastic restoring force, wherein the material web (2) during the advance (v) by the guide means (7) and / or accumulating means (6) in the transverse direction (q) is compressed and wherein further in the storage device (6) a predetermined, the feed (v) counteracting dynamic pressure (p) on the web (2) and the web (2) in the storage device (6) by an interaction of feed (v) and Back pressure (p) in the longitudinal direction (l) is jammed, such that in at least one in the transverse direction (q) of the material web (2) over a second section width (b2) extending second web section (2.2) of the material web (2) an irregular second Folding (F2) is generated with a second elastic restoring force and the material web (2) is thereby permanently deformed to form a packaging pad (10). Method according to Claim 1 , characterized in that the sheet material web is used in a single-ply configuration. Method according to Claim 1 or 2 , characterized in that the irregular second fold (F2) with the second elastic restoring force further in a in the transverse direction (q) of the material web (2) over a third section width (b3) extending third track section (2.3) of the material web (2) generated becomes. Method according to Claim 3 , characterized in that the first web section (2.1) of the material web (2) between the second and third web section (2.2, 2.3) is arranged. Method according to one of the preceding claims, characterized in that in the at least second web portion upon generation of the irregular second fold (F2) (2.2) Schrägfaltlinien (FS) are introduced, wherein the Schrägfaltlinien (FS) at an acute angle to the longitudinal direction (l) the material web (2) and one of the orientation of the Querfaltlinien (FQ) in the first path section (2.2) have different orientation. Method according to one of the preceding claims, characterized in that a paper web is used as material web (2). Method according to one of the preceding claims, characterized in that the dynamic pressure (p) in the storage device (6) is adjusted such that the material web (2) is jammed in such a way in the longitudinal direction (l) for producing the permanently deformed packaging pad (10), that the web is stowed to about 70% to 50% of its length, preferably about 60% of its length. Method according to one of the preceding claims, characterized in that the permanently deformed packaging cushion (10) in the form of an endless packaging cushion (10) at an outlet end (6 ") in the feed direction (R) from the storage device (6) is transported. Method according to one of the preceding claims, characterized in that the permanently deformed packing cushion (10) after leaving the storage device (6) by means of a provided, in the feed direction (R) of the storage device (6) downstream cutting device is cut. Method according to one of the preceding claims, characterized in that the material web (2) has a width (b) in a range of 75 mm to 300 mm, preferably a width (b) in a range of 100 mm to 200, particularly preferably in a range of 120 mm to 180 mm, and more preferably of about 160 mm. Device (1) for producing a packaging pad (10) according to a method according to the Claims 1 to 10 , comprising at least one holding device (4) for holding a supply (3) of a material web (2), at least one transport roller unit (5) for removing the material web (2) from the supply (3) and for transporting the material web (2) a predetermined feed (v) in a feed direction (R), at least one following in the feed direction (R) of the transport roller unit (5) following congestion means (6) with an inlet end (6 ') and an outlet end (6 "), at least one guide means (7 ) for guiding the material web (2), wherein the guide device (7) in a transition region between the transport roller unit (5) and the storage device (6) is arranged and in the feed direction (R) at least partially with the transport roller unit (5) and the storage device ( 6) overlaps, wherein the transport roller unit (5) is adapted to in a first web section (2.1) of the material web (2) to a directed, accordion-like first fold (F1) in a transverse direction (q) of the material web oriented transverse fold lines (FQ) generate, wherein the storage device (6) is adapted to a predetermined, the feed (v) counteracting back pressure (p) on the material web (2) to exercise and wherein the T Ransportwalzeneinheit (5), the storage device (6) and the guide means (7) are formed and cooperate such that they produce in at least a second path section (2.2) of the material web (2) an irregular second fold (F2). Device after Claim 11 , characterized in that the inlet end (6 ') of the storage device (6) facing the transport roller unit (5) and in the feed direction (R) partially overlaps with the transport roller unit (5). Device after Claim 11 or 12 , characterized in that the storage device (6) comprises a pitot tube (6b). Device after Claim 13 , characterized in that the storage device (6) further comprises in the region of the outlet end (6 ") on the pitot tube (6b) arranged spring flap (6a), wherein the spring flap (6a) is adapted to the back pressure (p) in the pitot tube (6b) and wherein the spring flap (6) has a spring with adjustable actuating force. Device according to one of Claims 11 to 14 , characterized in that the transport roller unit (5) has two cooperating transport rollers (5a, 5b), wherein the cooperating transport rollers (5a, 5b) are formed as toothed rollers. Device after Claim 15 , characterized in that the guide means (7) are formed as guide plates, wherein the guide plates extend at least over a diameter (d) of the transport rollers (5a, 5b) of the transport roller unit (5). Device according to one of Claims 11 to 16 , characterized in that in addition a cutting device is provided, wherein the cutting device in the feed direction (R) the discharge end (6 ") of the storage device (6) is connected downstream. Packaging pad (10) produced by a method according to Claims 1 to 10 ,

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