EP4091808B1 - Method for changing strapping and baler for applying this method - Google Patents

Description

I. Area of application

The invention relates to the production of pressed and strapped bales from loose pressed material by pressing and subsequent strapping, preferably in a pressing channel, as well as to a related baler, in particular a channel baler.

II. Technical background

The pressed bales made from loose pressed material such as cardboard boxes or flat-pressed plastic bottles must be strapped with a ring of strapping medium that runs closely around the bale, as pressing alone is not enough to hold the bale together.

Horizontal and vertical strapping are known, which means the position of the strapping plane in which the strapping lies, as well as the combination of the two, usually referred to as cross strapping.

Strapping carried out in a horizontal strapping plane is usually done in a channel baler - where there is no completely closed end of the press channel against which the press plate presses, but only a narrow resistance that opposes the pressing force, and which usually presses in a horizontal direction - by two quasi-endless strands of a strapping medium, for example a wire or a metal strip or a plastic strip that is drawn from a supply, usually a supply reel or a coreless supply roll, fed to different long sides of the bale and the front free ends of these two strands are connected to each other at or in front of the front end. In the case of wires, this is usually done by twisting, in the case of strips, by welding or pressing.

In the following, we will only talk about a supply reel, without limiting the type of supply of strapping medium to this type of supply. It should also be made clear that in large channel balers, one of these supply reels can usually weigh several hundred kilograms each and is therefore not fixed to the machine, but rather stands next to the machine - usually on a transport trolley.

This creates a loop around the resulting bale that is closed at the front and still open at the back when viewed from above.

Alternatively, this loop can also be formed by just a single strand of a strapping medium, the free end of which is fixed in place on one side of the press channel cross section to the base frame of the baler, so that the two legs of the loop are connected by different strand sections of the single strand here be formed from strapping medium.

As the bale builds up and the front end of the bale moves forward in the baling channel, both strands - or the alternative single strand mentioned above - are increasingly pulled off the supply spool.

When the bale has reached the desired length in the pressing direction and is to be strapped, the pressing is interrupted by stopping the press plate at a certain longitudinal position in the pressing direction and keeping the previously produced bale under pressing force.

This specific longitudinal position defines the so-called binding plane, which is transverse to the pressing direction, in which binding takes place at the rear end of the bale.

However, the front end of the bale is not always at exactly the same distance from this setting level, because each stroke of the baler creates a layer thickness that changes depending on the material, which is usually between 20 and 30 cm. Depending on this, the distance of the front end of the bale from the binding level and thus the bale length varies in practice by +/-10 cm.

This setting level is usually located at the end of the press stroke in the maximum advanced position, the press position, of the press plate, usually at the transition between the press box and the subsequent press channel.

In this binding position, the press plate - in the front of which there are usually grooves running across the cross section of the press box - is located with its front side at the longitudinal position of one cross connector arranged next to the press channel for each strapping level.

The cross-connectors are now guided across the cross-section of the press box and, for example, in the grooves in the front of the press plate and take one strand or strand section of the strapping medium to the other side of the press channel cross-section to the other strand or strand section of the loop running there.

In horizontal strapping, the cross-transfer device is usually a slider, such as a wire slider, which pushes the strand or strand section of the strapping medium horizontally to the other side of the press channel cross-section, i.e. to the connection side for the strands or strand sections.

If the pressed material does not hold together well in the pressed bale, strapping must be carried out not only in horizontal strapping levels - which is the simpler solution due to the possible lateral supply of strapping medium - but also in one or more vertical strapping levels, in which one of the strands of the Strapping medium must be fed under the machine.

This is a heavily contaminated area and access is virtually non-existent, which is why additional measures often have to be taken to facilitate the feeding of the lower strands for vertical strapping.

In the case of vertical strapping, the cross-connector is usually a vertically moving drawing needle arranged above the pressing channel, which only pulls the lower strand or strand section up to the upper connection side for the strands or strand sections when it moves backwards through the pressing channel cross-section.

The two strands or strand sections that are brought close together by the cross-connector are severed there, i.e. behind the rear end of the bale that has been produced so far, and at the same time their loose rear and their loose front ends are connected to each other. The rear ends of the severed strand pieces on the bale side are connected to form a rear connection at the rear end of the bale that has been produced, and the front ends of the still virtually endless strands are connected to form a front connection, which in turn forms a loop that is closed at the front and open at the back and leads around the front of the next bale to be produced.

This is also possible using just a single strand to produce the strapping.

When a fraction is changed - i.e. when a material with different properties regarding pressing and cohesion is pressed into bales - the type of strapping should usually also be adapted to it:
For example, it may be intended to omit one of the strappings, preferably the vertical one, from the previous cross strapping in the new fraction and/or to change the number of strapping levels, i.e. the number of individual strappings of this type of strapping, in the case of horizontal and/or vertical strapping.

Then the loops that have already been created and are open at the back must be removed by cutting them in the front area and separating the corresponding strands again.

Conversely, when further strapping levels or a further type of strapping are added, in particular vertical strapping is added to horizontal strapping, these strands must be fed back to the front end of the bale and there manually linked together again in order to form the required loop that is open at the back .

This work has so far been carried out manually, which is time-consuming and error-prone and is difficult and dirty work, especially on the lower strands of the vertical strapping. The document DE-A-3139175 discloses a method for automatically activating or deactivating a single or several individual, parallel strappings, i.e. a strapping level in a baler, in which in particular the strapping medium is kept in the form of quasi-endless supply spools on the baler, whereby for Activating a single strapping, one strand is moved to the other strand for this strapping along the binding level via a transfer path and the two strands are automatically linked together again.

The document DE-A-102016117755 discloses a baler according to the preamble of claim 9.

III. Description of the invention a) Technical task

It is therefore the object according to the invention to create a method and a baler suitable for this purpose, which enables the strapping to be changed automatically, in particular according to the type and/or number of strapping, in a simple manner.

b) Solution to the task

This object is solved by the features of claims 1 and 9. Advantageous embodiments emerge from the subclaims.

With regard to the method for automatically ending or resuming, i.e. deactivating and activating, a single or several individual, parallel strappings, i.e. a strapping level in a baler, in particular a channel baler, the procedure according to the invention is such that the for For the next strapping, the loop that has already been formed and is still open at the back is automatically cut in its front area, resulting in two separate strands of strapping medium that are no longer suitable for further strapping - without re-linking.

When this strapping is resumed, this link is automatically created again in the binding level, meaning that this strapping level is active again.

Specifically, the procedure is as follows:
To deactivate an individual strapping, the existing loop, which consists of two strands of strapping material linked together by a front connection, is automatically cut at least once.

It should be made clear that a connection, such as a front connection or a rear connection, is understood to mean any type of connection by which two strands can be connected to one another, be it gluing, welding, twisting or knotting.

The cutting takes place in the pressing direction downstream of the binding plane, and at a separation position such that the two individual strands created by the separation each have a sufficient overhang length beyond the binding plane - in which the cross-connectors of this type of strapping are located - so that when one strand is later moved to the other strand along the binding plane, the two strands reach each other again and the overhang length is also sufficient for the two strands to be automatically linked together.

To activate an individual strapping, one strand must be moved to the other strand along the binding level via a transfer section and the two strands are automatically linked together on the binding level to form a loop, which is then, as is known, due to the further construction of the bale The front is pushed forward into the press channel.

The invention preferably relates to such balers, in particular channel balers, in which the strapping medium is kept in the form of quasi-endless supply reels on or next to the baler,

Nevertheless, the protrusion lengths are chosen to be as short as possible in order to keep the loss of setting medium during deactivation and later activation as low as possible.

Since with only one cutting of the loop the front connection remains at the end of one of the two resulting strands, and this front connection always carries the risk of snagging, the loop is preferably automatically severed twice, namely at separation points opposite each other with respect to the front connection.

With regard to the longitudinal position in the channel direction, the cutting is usually carried out at one of two different cutting positions in the longitudinal direction.

If one of the two types of strapping can be dispensed with, namely cross strapping, vertical strapping and horizontal strapping, then vertical strapping is generally dispensed with, since horizontal strapping is easier to carry out and less prone to failure for reasons of accessibility.

However, it can also happen that the number of parallel strapping levels of a type of strapping should be changed, in particular reduced.

For vertical strapping, the front splice is typically located at or near the front upper transverse edge of the bale.

To deactivate a single vertical strapping, the upper strand is usually severed at a first separation point in the longitudinal section, i.e. the part of this strand running in the longitudinal direction, in particular at a sufficient distance upstream of the connection point between the two strands so that this connection section - in extreme cases up to 20 cm or 30 cm long - is not additionally severed.

If a second cutting of the loop is carried out in order to remove the front connection - which then lies between the two cutting points - as a risk factor, the lower strand is also cut at a second cutting point.

This second separation point should be in the longitudinal section of this strand.

Since cutting the loops with a cutting tool, which has to be fed through an opening in the wall of the press channel and thus works in a way that is not visible inside the press channel, is always somewhat risky, there is the alternative possibility of providing at least one cutting position in the pushing-through direction behind, in particular immediately behind, the end of the press channel and thus in a visible place.

Often it is not individual strapping levels that should be deactivated or activated, but rather all individual strappings of a type of strapping, i.e. vertical or horizontal strapping, at the same time.

Then this is carried out in particular at a separation position located in the same separation plane for the respective strand of the several strapping levels.

The most common reason for deactivating or activating individual strappings or all strappings of a type of strapping is a change in the fraction of the material to be processed, where the new fraction has different properties in terms of cohesion in the bale, mutual interlocking, restoring forces, etc.

If fewer strapping levels are required for the new fraction, the cutting of the strands of the loop of the at least one individual strapping to be deactivated is carried out on the loop guided around the front end of the 1st bale of the new fraction.

If a vertical loop is severed, the upper strand then remains in the corresponding groove in the inside of the upper wall of the press channel.

The lower strand, which extends upwards in front of the front of this bale to approximately the upper transverse edge with the front connection at the end in the case of only one separation, will slide downwards with the front connection as the bale is pushed forwards between the last bale of the old fraction and the first bale of the new fraction, i.e. in the fraction separation plane, as the fraction separation plane continues to move forwards, until the entire lower strand is also in the grooves in the bottom of the press channel running in the pressing direction and there it causes just as little interference as the upper strand.

The decisive factor for the subsequent automatic activation of individual strapping levels or an entire strapping type is that when deactivating after the loop has been cut, the individual strands have a sufficient overhang length beyond the binding level, whereby this overhang length is very different for the two strands:
The required overhang length of the strand that has to be brought to the other strand on the binding level before a connection - usually the lower strand in the case of vertical strapping - is at least twice the length of the connection, whereby this vertical length of the connection is usually longer than the bale height by the amount of the connection required (the horizontal length of the connection is analogously longer than the bale width by the amount of the connection required), so in particular the length of the connection already includes the length of the connection required.

The connection requirement refers to the length at the free end of a strand that is required to create a connection between the two strands; when twisting, for example, the length required for twisting.

In contrast, the required overhang length of the strand that is not to be moved transversely before joining is only equal to the connection requirement.

• ein Grundgestell,
• eine Presskammer,
• einen von Kanalwänden umgebenen, sich an den Pressekasten in Pressrichtung anschließenden, Presskanal,
• eine in Kanalrichtung, also in und entgegen der Pressrichtung, durch den Presskasten bis zum Anfang des Presskanals verfahrbare Pressplatte,
• je eine Zuführeinheit für wenigstens je einen Strang des Umreifungsmediums,
• je einen Querverbringer, insbesondere eine Ziehnadel oder eine Durchschubeinheit, für jede vorgesehene Umreifung,
• wenigstens eine Abbinde-Einheit zum Verbinden der freien Enden zweier Stränge oder Strang-Abschnitte einschließlich einer Trenn-Einheit zum gleichzeitigen oder vorherigen Durchtrennen der beiden Stränge oder Strang-Abschnitte und
• eine Steuerung, die alle beweglichen Teile der Ballenpresse steuert.

With regard to the baler, a generic channel baler naturally has all the generic components, such as

• a base frame,
• a press chamber,
• a press channel surrounded by channel walls and connected to the press box in the pressing direction,
• a press plate that can be moved in the channel direction, i.e. in and against the pressing direction, through the press box to the beginning of the press channel,
• one feed unit each for at least one strand of the strapping medium,
• one cross-connector, in particular a pulling needle or a push-through unit, for each strapping intended,
• at least one binding unit for connecting the free ends of two strands or strand sections including a separating unit for simultaneously or previously severing the two strands or strand sections and
• a control system that controls all moving parts of the baler.

According to the invention , in order to achieve the object, at least one separating device for strapping medium is provided at each activatable and deactivatable strapping level.

Preferably, the baler has two separating devices for strapping medium at each activatable and deactivatable strapping level for the reasons mentioned above.

In the case of vertical strapping levels, the separating position at which the first separating device is located is in the longitudinal section of this strand, in particular the upper strand.

Preferably, the separation position is from the front connection against the pressing direction to behind the rear end of the front connection offset, in particular offset from there as slightly back as possible.

If a second separating device is present in vertical strapping planes, the separating position at which the second separating device is arranged is located in the longitudinal section of this strand, in particular the lower strand,

For good accessibility to the separating devices, the first and/or the second separating device can be arranged in front of or in the end of the press channel in the pressing direction.

If activation or deactivation of individual strapping levels is not desired, but only of a complete strapping type, i.e. horizontal or vertical strapping, it is sufficient if the 1st separating devices of a strapping type on the one hand and/or the 2nd separating devices of this strapping type on the other hand each have only one common separating drive.

However, for the deactivation and activation of individual strapping levels, each individual separating device for each strand of a strapping level must have its own controllable separating drive, which greatly increases the structural and control engineering effort.

If two separators for the two strands of the same strapping level are located at the same separating position, these two separators can also have only one common separating drive, but this still requires a separating drive for each strapping level.

In order to have sufficient overhang lengths for the separated strands for reconnection, the distance from the separating device is for the strand to be transported to the binding level before connecting to the other strand, at least twice the transport distance, i.e. including the connection requirement.

The distance from the separating device for the strand that is not to be moved transversely before joining to the binding plane is at least the connection requirement.

c) Examples of implementation

Figur 1a:

wesentliche Komponenten, die den Kern einer horizontal verpressenden Kasten-Ballenpresse bilden, in perspektivischer Ansicht, jedoch u.a. noch ohne den Presskanal, als Stand der Technik,

Figur 1b:

eine im Wesentlichen vollständige horizontal verpressende Kasten-Ballenpresse nach dem Stand der Technik, enthaltend die wesentlichen Komponenten gemäß Figur 1a , mit sowohl vertikaler als auch horizontaler Umreifung der Ballen in analoger perspektivischer Ansicht wie Figur 1a ,

Figur 2a:

entgegen der Pressrichtung betrachtet ein Blick auf die stirnseitig offene Ballenpresse der Figur 1a , b nach dem Stand der Technik mit darin befindlichem, bereits horizontal und vertikal umreiftem Ballen,

Figur 2b:

den sowohl horizontal als auch vertikal umreiften Ballen gemäß Figur 2a separat in perspektivischer Ansicht,

Figur 3a:

die Ballenpresse gemäß Figur 1a , b nach dem Stand der Technik in einem Horizontalschnitt entlang der Linie Illa - Illa in Figur 2a beim horizontalen Umreifen, mit noch hinten offener Schlaufe,

Figur 3b:

die Ballenpresse gemäß Figur 1a , b nach dem Stand der Technik in einem Horizontalschnitt entlang der Linie IIIb - IIIb in Figur 2a beim horizontalen Umreifen, mit fertig umreiftem Ballen,

Fig. 4a - e:

den Aufbau von Ballen mit vertikalen Umreifungen bei einer 1. Bauform der Kanal-Ballenpresse geschnitten entlang einer vertikalen Umreifungs-Ebene,

Fig. 5a - i:

den Übergang zu einer neuen Fraktion bei einer 1. Bauform der Kanal-Ballenpresse in einem Vertikalschnitt entlang einer vertikalen Umreifungs-Ebene,

Fig. 6a - d:

den Übergang zu einer neuen Fraktion bei einer 2. Bauform der Kanal-Ballenpresse in einem Vertikalschnitt entlang einer vertikalen Umreifungs-Ebene.

An embodiment according to the invention is described in more detail below by way of example. Shown are:

Figure 1a:

essential components that form the core of a horizontally pressing box baler, in perspective view, but still without the pressing channel, as state of the art,

Figure 1b:

a substantially complete horizontally pressing box baler according to the state of the art, comprising the essential components according to Figure 1a , with both vertical and horizontal strapping of the bales in analogous perspective view as Figure 1a ,

Figure 2a:

Looking at the front-open baler, opposite to the pressing direction, Figure 1a , b according to the state of the art with a bale already strapped horizontally and vertically,

Figure 2b:

the bales strapped both horizontally and vertically according to Figure 2a separately in perspective view,

Figure 3a:

the baler according to Figure 1a , b according to the state of the art in a horizontal section along the line Illa - Illa in Figure 2a when strapping horizontally, with the loop still open at the back,

Figure 3b:

the baler according to Figure 1a , b according to the state of the art in a horizontal section along the line IIIb - IIIb in Figure 2a during horizontal strapping, with the bale already strapped,

Fig. 4a - e:

the construction of bales with vertical strapping in a 1st design of the channel baler cut along a vertical strapping plane,

Fig. 5a - i:

the transition to a new fraction in a 1st design of the channel baler in a vertical section along a vertical strapping plane,

Fig. 6a - d:

the transition to a new fraction in a 2nd design of the channel baler in a vertical section along a vertical strapping plane.

The Figures 1a to 3b show - excepted Figure 2b - as the state of the art, a baler for horizontal and vertical strapping - which is called cross-strapping when carried out together on a bale - with its essential components, including the strand brakes 5 installed on it, which at the same time act as a measuring device 9 for the take-off length AL for the Strapping medium 100 or its horizontal strands 100a, b are used only in Figure 3a , b is marked.

The basic structure of such a channel baler is best shown in the perspective views of the Figures 1a and 1b :
In the pressing direction 10 , upstream of the horizontally lying pressing channel 1 with rectangular cross-section 1" formed by four in the channel direction 1' , the Pressing direction 10 , considering circumferentially arranged channel walls 1a to 1d as well as a beginning 1.1 and an end 1.2 , in channel direction 1', aligned with the press channel 1 , there is the so-called press box 21, which has an open top in its filling area 21a , i.e., which lacks the upper channel wall or top wall 1b , but which otherwise has the same cross-section 1" and runs in the same direction as the press channel 1. This filling area 21a is followed in pressing direction 10 by the compression area 21b , which is already closed at the top - like the press channel 1 .

This open top is extended upwards by a filling shaft 25 , which is formed by four upright or even vertical walls, arranged all around in plan view, for filling the pressed goods P to be pressed, into Figure 1a for example in the form of a box.

The binding units 7.1, 7.2 for horizontal and vertical strapping are also arranged in the longitudinal area of the compression area 21b .

In the press box 21, a press plate 2, which is transverse in its cross section 1" and fills this cross section 1" , is displaceable in the pressing direction g 10 , which can be pushed forward in the pressing direction 10 with a high pressing force, provided by one or more pressing pistons 23 .

In the in Figure 1a and Figure 3a In the situation shown, the press plate 2 is in the retracted position, namely at the rear end of the press box 21 in the pressing direction 10 .

As is known, the press plate 2 moves forward from this starting position several times in succession, approximately to the beginning of the press channel 1 , with each press stroke in the longitudinal direction of the press channel 1 producing a new vertical, transverse, disc-shaped layer of the resulting bale B , as best shown in Figure 3a can be seen in the compression area 21b is formed, and thereby the already formed front end of the bale B moves forward until the bale B has the desired bale length BL in the pressing direction 10 , as in Figure 3b shown.

The punch knife 4 present on the press plate 2 on its upper horizontal transverse edge - its position in Figure 1a is indicated - interacts with the fixed counter knife 24 formed on the rear edge of the upper wall 1b of the compression area 21b and cuts off any pressed material P protruding over the top of the press box 21 .

This in Figure 1b left end of the machine forms the end area 1.2 of the press channel 1 and includes a Figure 1b recognizable tapering section, which has a reduced cross-section, adjustable by means of a possibly adjustable constriction 22 , at least in one of the transverse directions to the pressing direction 10 and thereby offers the already finished bale B to be pressed through there sufficient resistance for the new bale B pressing against it from behind and currently being formed in the pressing channel 1 .

The newly created bale B is completed after reaching a certain bale length in the press channel 1 by being placed in several superimposed horizontal strapping levels Uh" and adjacent vertical strapping levels Uv' , as in Figure 2a shown, is strapped with a tensile strapping medium 100 , i.e. in a ring shape and tightly fitting to the bale B , whereby the bale B - after the pressing force applied by the press plate 2 in the pressing direction 10 no longer acts on the bale B - primarily in the pressing direction 10 something can stretch, as far as the ring-shaped horizontal straps Uh, Uv allow, but the bale B cannot collapse.

The production of the horizontal strapping Uh using strapping medium 100 and mostly using the strand brake 5 is best done under the supervision of the Figures 3a , b to recognize, each strapping Uh is formed from two in the corresponding horizontal strapping plane Uh" lying horizontal strands 100a, b of the strapping medium 100:
For this purpose, at the height of each of the horizontal strapping levels Uh" - as in Figure 1a , 2a as well as on the later finished bale according to Figure 2b visible - on the outside - as best seen in the view of the Figure 3a recognizable - each of the two vertical side walls 1a, 1c , preferably in the area upstream in the pressing direction 10 , i.e. in front of the press box 21 , each as part of a feed unit 3a, b, a deflection roller 13* is present for diverting the strapping medium 100, 200 from the supply spool 13 , which is usually located away from the machine, to the respective horizontal binding unit 7.1 or vertical binding unit 7.2. A strand 100a, 100b, 200a, 200b is wound onto the supply spool 13 and can be pulled off therefrom, wherein the feed unit 3a, b can additionally comprise further elements such as deflection rollers, guide elements, etc.

Each of the horizontal strands 100a, b for a horizontal strapping Uh is guided forward on the outside of the respective side wall 1a, 1c - as in Figure 1a for the topmost strand 100b there as an example - into the end area of the press box 2 1 and there through a corresponding wall opening 26 into the interior of the press box 2 1. There, the free ends of the two strands 100a, b are connected to each other in the form of a front connection 101 , which was not previously produced manually, but by means of a connection unit 7.1 , which is located in a longitudinal position - the binding plane A" perpendicular to the pressing direction 10 - corresponding to the front of the press plate 2 in its pressing position, as shown in Figure 3b is only represented symbolically.

The front connection 101 is preferably located in the first transverse direction 11 - that is, the transverse direction to the pressing direction 10 , which lies in the corresponding horizontal strapping plane Uh" - on one side, the connection side 1'a , in the interior of the pressing channel 1 , in this case or near the inside of the side wall 1a.

On the side wall to which the front connections 101 - which are arranged one above the other for all horizontal strapping Uh and on the same side of the press channel 1 - are adjacent, a strand brake 5 is arranged separately for each strapping Uh on the respective outside of this outer wall 1a , through through which the respective strand 100a is guided in the direction of travel 10' . The strand brake 5 offers a pulling resistance for the strand 100a , so that the strand between the front connection 101 and the strand brake 5 remains tensioned and does not become too loose.

Furthermore, Figure 1b It can be clearly seen that the walls 1a to 1d of the pressing channel 1 do not consist of plates, but of profiles with a box-shaped cross-section arranged next to one another and running in the pressing direction 10. However, these do not lie against one another, but are separated from one another by slot-shaped spaces, also running in the pressing direction 10, which are used as groove-shaped receiving spaces for the strapping material.

The pressure acting radially from the inside to the outside in the material to be pressed generally presses the strands into these slot-shaped spaces, so that they generally run slightly outside the cross section of the actual press channel 1.

As the bale B is built up, i.e. the front end of the bale B moves forward in the pressing channel 1 in the pressing direction 10 and thus also the loop S surrounding this front end of the bale B , which is closed at the front and still open at the rear and is formed by the two strands 100a, b and their front connection 101 , strapping material 100 is increasingly drawn off from the respective supply spools 13 .

When bale B has reached the desired bale length BL , as in Figure 3b shown, the press plate 2 is shown in the in Figure 3b The setting position shown in dashed lines, in which its forward-facing press surface is approximately in the setting level "A" - at the beginning 1.1 or slightly dipping into the bale channel 1 - stopped, and the horizontal strapping Uh of the bale B is completed:
This is done by first of all using a cross connector 8.100, which is part of the horizontal binding unit 7.1 - here in the form of a horizontally movable push-through unit 6, the so-called wire slider 6 - on the one opposite the front connection 101 , i.e. the connection side 1'a Side of the base frame 20 , i.e. the side wall 1c there, is fastened, in the direction of the opposite side between the rear end of the bale B and the front end of the press plate 2 - usually along grooves provided for this purpose in the front surface of the press plate 2 - through corresponding through openings is pushed through the side walls.

The cross-connector 8,100, a wire pusher 6, takes the strand 100b of the strapping material 100 with it, generally pushing it in front of it until it reaches the strand 100a on the other side, i.e. the connecting side 1'a , usually only there outside the press channel 1.

This is preferably done simultaneously for all horizontal strappings Uh by means of separate cross-connectors 8,100 or a single cross-connector 8,100 that extends vertically over all horizontal strappings Uh .

• einerseits nun nahe der Seite des Presskanals 1, an dem der durch die Strangbremse 5 laufende Strang 100a zugeführt wird, die beiden Stränge 100a, b hinter dem Ballen B durchtrennt,
• die hinteren Enden der beiden dadurch gebildeten Strangstücke 100a1, 100b1 mit ihren hinteren Enden von der Abbindeeinheit 7.1 miteinander möglichst enganliegend hinter dem hinteren Ende des Ballens B verbunden zu einer Heckverbindung 102 und
• die neuen freien vorderen Enden der quasi endlosen Stränge 100a, b wiederum zu einer neuen Frontverbindung 101 und damit einer neuen Schlaufe S' miteinander verbunden.

Then - as in Figure 3b - by means of the binding unit 7.1 which is usually present for each horizontal strapping Uh

• on the one hand, now close to the side of the press channel 1 , to which the strand 100a running through the strand brake 5 is fed, the two strands 100a, b are severed behind the bale B ,
• the rear ends of the two strand pieces 100a1, 100b1 thus formed are connected with their rear ends by the binding unit 7.1 as closely as possible behind the rear end of the bale B to form a rear connection 102 and
• the new free front ends of the quasi endless strands 100a, b are again connected to form a new front connection 101 and thus a new loop S' .

The bale B is thus strapped and can be pushed forward into the press channel 1 and removed there from its front end 1.2 , the length of the press channel 1 generally corresponding to several times the length of a bale B.

The press plate 2 can then be moved back to its starting position and begins to build the next bale with the next stroke, again while simultaneously pushing the newly formed open loop S ' or S in front of it by means of the front end of the new bale B being created.

If the pressed material P to be forgotten does not hold together well in the pressed bale B , and horizontal strapping Uh as described previously is not sufficient, additional vertical strapping Uv - usually multiple times - is carried out if necessary. Such a so-called cross-strapped bale B shows Figure 2b .

The production of the vertical strapping Uv is carried out analogously to the horizontal strapping Uh , i.e. each of the several vertical strappings Uv lying next to one another in parallel vertical strapping planes Uv " consists of an endless ring of strapping medium 200 , the two finite strand pieces 200a1 and 200b1 - see Figures 4a to 6d - from the strands 200a and 200b are connected to one another in both a front connection 201 and a rear connection 202 .

The vertical strapping Uv is also produced using analogous fixtures:
On the channel baler according to Figure 1b a series of deflection rollers 13* for the supply of strapping medium 100 , 200 to the binding units 7.1, 7.2 can be seen, which are part of the two horizontal, left-hand and right-hand, feed units 3a, b as well as the two vertical feed units, namely the upper feed unit 3c as well as the lower feed unit 3d , which are in the Figures 4a to 6d are not shown.

Upstream of the filling shaft 25 and approximately at the height of its upper edge, seven such deflection rollers 13* can be seen on the left and right.

Five of these are used to feed the five left-hand and five right-hand strands 100a, 100b to the horizontal binding unit 7.1 for five horizontal strappings Uh , while the last two are used to feed the four underside strands 200a for the four vertical strappings Uv downwards the machine serves the local parts of the vertical, underside feed unit 3d .

The top strands 200b for the four vertical strappings Uv are fed to the vertical binding unit 7.2 via four deflection rollers 13* , which are part of the vertical, top-side feed unit 3c and immediately in front of the filling shaft 25 , still behind the vertical binding unit 7.2 , on an auxiliary frame are arranged.

In contrast to horizontal strapping - in which the horizontal cross connectors 8,100 are usually sliders that push the horizontal strapping medium 100 over to the other side of the press box 21 , although this does not necessarily have to be the case - with vertical strapping, as a rule So -called drawing needles 8,200 are used as cross connectors.

The target needles 8,200 are vertically movable and mounted on the top of the press box 21 and move down empty in front of the press plate 2 and take hold the lower strand 200a of the horizontal vertical strapping medium 200 supplied to the underside of the press box and pull it to the top and the top strand 200b there. The two strands 200a, b are then connected to one another at the top of the press box 21 , which is preferred for reasons of better accessibility to such a top-mounted binding unit 7.2 .

With regard to the binding units 7.1, 7.2, it should be made clear at this point that they have a dual function, namely, on the one hand, after two strands, such as 200a and 200b , have come sufficiently close together, to sever them at the same longitudinal position and to connect the two rear ends on the one hand and the two front ends on the other hand of these strands or strand pieces to each other, for example by twisting them in the case of binding wire.

When the lower strand 200a is pulled up around this transport distance, the strapping medium 200 is removed from its supply roll, since the strand section in front of the binding level "A" is already fixed as a loop with the other strand 200b .

In contrast to the Figures 3a , b show the Figures 4a to e a channel baler according to the invention in a vertical section lying in the pressing direction 10 along a vertical strapping plane U".

This should be in the Figures 4a to e, the implementation of the vertical strapping is first shown, with the horizontal strapping - of which only two are shown here as an example on top of each other, namely Uh1 and Uh2 - as shown in Figures 3a , b described can of course also be carried out, namely on the same setting level "A".

The pressing direction 10 here runs from right to left, whereby it is indicated that the pressing plate 2 - which is shown with solid lines in its maximum advanced pressing position, in which the setting also takes place is carried out - back and forth movement can be carried out, i.e. from there back movement can be carried out to behind the still visible front wall of the filling shaft 25, and pressed material falling there on the next forward stroke into the compression area of the press box 21 and further into the adjoining press channel 1 with pressing can push in.

Much further to the left, just before the open end of the press channel 1, the adjustable narrow point 22 in the press channel 1 is shown, with which the necessary resistance is created for the bales B pushed through, which represents the abutment for the press plate 2 .

When presenting the Figures 4a -d three bales B1, B2, B3 are already finished in terms of their length and the front two bales B1, B2 are also already strapped, both with horizontal strapping Uh1, Uh2 and the vertical strapping Uv which is only visible in these figures, of which there are usually several one behind the other in the direction of view.

Each vertical strapping Uv consists of a lower, U-shaped strand section 200a1 in the illustrations and an upper straight strand section 200b1, which are connected to one another at a front connection 201 and a rear connection 202, which are located on the top side of the bale near its front edge and near its rear edge, to form a closed strapping, as best shown in the enlarged detail of the Figure 4a from which the length of the connection requirement VB can be seen, i.e. the length of the front connection 201 or rear connection 202.

The third bale B3 is finished in terms of its bale length BL - which can vary slightly from bale to bale - and upstream of the binding unit 7.2 with the pulling needle 8.200, which is mounted on the top of the pressing channel 1, the upper strand 200b passes through the upper wall 1b from the outside into the interior of the pressing channel 1 and runs along the top of this bale B3 in the pressing direction 10 to the front.

The lower strand 200a, which is also fed through the bottom wall 1a, i.e. the bottom of the pressing channel 1, upstream of the binding unit 7.2, i.e. the binding level A", runs along the underside of the bale B3 in the pressing channel 1 in the pressing direction 10 to the front and along its front upwards to its upper transverse edge, near or at which it is connected to the upper strand 200b in the front connection 201.

The bale B3 is thus surrounded at the front by a loop S made of strapping material 200 which is still open at the rear, and now this loop is to be closed to form a strap by connecting the two strands 200a, b to one another at the rear end of the bale B3 in the form of a rear connection 202.

For this purpose, the drawing needle 8.200 is moved downwards from its starting position, in which its lower tip is above and outside of the channel cross-section 1", in a groove 27 provided for this purpose in the front of the press plate 2, until its barb reaches under the lower strand 200a accordingly Figure 4b .

The drawing needle 8.200 is then moved back upwards as shown in Figure 4c , taking the lower strand 200a with it upwards until it comes into contact with the upper strand 200b as shown in Figure 4d .

There, both strands 200a, 200b are severed by means of the separating device of the binding unit 7.2 (not shown) and the front ends of the two strands 200b, a are connected to each other beforehand or simultaneously to form a new front connection 201 and the rear ends of the strand sections 200b1 and 200a1 adjacent to the bale B3 are connected to each other to form a new rear connection 202 on the bale B3, which is thereby completely strapped in accordance with Figure 4e , since the analogous process occurs with the horizontal strapping Uh1, Uh2 when the bale B3 is in the same longitudinal position - usually before and not after the vertical strapping is made.

As the Figures 4a to e further show, downstream of the setting plane A" in a separating plane T1", which is also preferably perpendicular to the pressing direction 10, there is a separating device TV1 with a separating tool TW, which is shown in the basic representation of the figures is shown similarly to the drawing needle, but has a cutting tool TW at its front end, for example in the form of pliers and does not have to be able to carry out a vertical movement, but only has to be able to be activated and deactivated, i.e. can be opened and closed with scissors or pliers must. In the direction of the Figures 4 to 6 one is arranged on each of the upper strands or strand sections 200b or 200b1, which, when activated, can reach and cut the upper strand or strand section 200b, 200b1, for example, and the same with the lower strands.

The separating device TV1 is located here at a distance A1 in the pressing direction 10 in front of the binding plane A" and here still upstream of the constriction 22, whereby the latter is not necessary for the realization of the invention.

Based on Figures 5a to i, the change from an old type of material, i.e. an old fraction, to a new fraction is shown, whereby the material of the new fraction, in contrast to that of the old fraction, should only be strapped horizontally and not also vertically.

Figure 5a shows how the last bales Bx, By, Bz of the old fraction are still in the press channel 1, and behind them the beginning B1A of the first bale B1 has already been partially built up from the material of the new fraction.

Both the separating tool TW of the separating device TV1 and - as is usual when building the bale - the drawing needle 8.200 for vertical strapping are in their deactivated starting position, with the drawing needle 8.200 in the upwardly retracted position outside the cross-section 1" of the pressing channel 1.

In Figure 5b the first bale B1 of the new fraction has reached its target length and should - only - be strapped horizontally, which in Figure 5b has already happened. Vertical strapping does not take place.

Instead, according to Figure 5c the subsequent second bale B2 is increasingly built up from the material of the new fraction, from which Figure 5c the beginning of the bale B2A is visible and as a result the horizontally strapped bale B1 - together with the bales of the old fraction still in the press channel 1, here only Bz - is pushed further forward - whereby B1 and B2A are still surrounded by a loop S running around the front of the bale B1, which is open at the back, made of the strands 200a and 200b at the top, bottom and front, from which no more vertical strapping is to be produced.

Figure 5c shows the longitudinal position of the bales in the pressing channel 1, in which the front end of the first bale B1 of the new fraction has already passed the top-mounted separating device TV1 and its separating plane T1", i.e. the separating position TP, is already behind the front connection 201 of the loop S, preferably just or immediately behind it.

In this longitudinal position of the bales in the press channel 1, the separating device TV1 is activated and the upper strand 200b behind the front connection 201 is severed, as shown in Figure 5d visible, so that after that according to Figure 5e the upper strand 200b is separated and has a separation point TS in the form of a gap.

If the beginning B2A of the emerging bale B2 is then further built up and the bales Bz, B1 and B2A move further forward in the pressing direction 10, i.e. to the left, the upper strand 200b remains in position, i.e. with its front one End approximately at the separating device TV1 due to the strand brakes (not shown) acting on it, while the free end of the lower strand 200a with the one at its front The end area of the former front connection 201 still present along the front of the bale B1 is increasingly pulled downwards by the forward movement of the bale B1.

Figure 5f shows the state in which the second bale B2 has reached its target length and has already been strapped horizontally. Then the front end of the lower strand 200a is approximately halfway up, at least usually in the area of the front surface, of the first bale B1 of the new fraction.

When the next bale B3 is built up, from which Figure 5g the beginning B3A is already visible, the free end of the lower strand 200a will be pulled around the transverse lower edge of the bale B1 as the front end of the bale B1 continues to move forward, and the entire lower strand 200a will thus lie in the pressing direction 10 between the undersides of the bales of the new fraction and the bottom 1a of the pressing channel 1.

It will also no longer be deducted from its supply roll, not shown, due to the strand brake, also not shown, acting on it.

Now the new fraction can be further processed and any number of bales of the new fraction can be produced with only horizontal strapping, while the strands that end freely at the front for vertical strapping, i.e. upper strand 200b and lower strand 200a, are in their position in the press channel 1 according to Figure 5g remain.

If at some point there is a change to another fraction, which again requires vertical strapping in addition to horizontal strapping, then after the target length of the first bale B1 of the next fraction has been achieved, the last bales BY and BZ of the previous fraction can be strapped - as in Figure 5h shown - by means of the drawing needle 8.200 the lower strand 200a ending freely at the front is grasped by the drawing needle 8.200 - as in Figure 5h shown - and pulled up - as in Figure 5i shown - a total of one transfer route VS - as in Figure 5g shown - and there processed with the upper strand 200b as known, i.e. from the two strands a new rear connection 202 and a new front connection 201, which are separated from each other, are created.

In order for this to be possible, Figure 5g there must be a sufficient overhang Üa of the lower strand 200a and Üb of the upper strand 200b beyond the binding plane A" in the pressing direction 10, because when the lower strand 200a is pulled up to the upper strand 200b and both together slightly beyond its horizontal height - so that the separation and connection of the strands is possible - the two strands, especially the lower strand 200a, are not pulled off from their invisible supply rolls to the right of the binding plane A", i.e. upstream of it, but are pulled back from their free front end because there is less resistance there.

Accordingly, the overhang Ua of the lower strand 200a must be at least twice the travel distance VS by which the drawing needle 8,200 moves upwards after gripping the lower strand 200a, and better a little more, namely the so-called connection requirement VB , i.e. the length that is needed to connect two ends of two strands 200a, b to one another, for example to twist or weld them, in order to create a front connection 201 or rear connection 202.

Out of Figure 5g It becomes clear that the existing overhang length Üa is made up of the bale height BH on the one hand and the distance A1 between the binding plane A" and the separation plane T1" on the other hand and thus the distance A1 must at least correspond to the bale height BH, preferably larger.

If only one isolating device TV1 is present, as in the design according to Figures 5 , the overhang Üb of the upper strand 200b is always large enough to create a new vertical strapping, because the upper strand 200b is only pulled upwards by a small distance, approximately the connection requirement VB, which is only a few centimeters, thus always larger than the distance A1 approximately at one bale height.

The Figures 5e , f , G , H However, they also show the problem if there is only one such separating device TV1, namely for the upper strand 200b:
Then in the end area of the lower strand 200a after separation there is the former front connection 201, which consists of two interconnected short pieces of strapping material 200, and when pulling around the front upper edge, pulling down along the front of the bale and pulling around its lower one This former front connection 201 can very easily get caught on the transverse edge, for example on the horizontal strapping present on the bales, with the result that problems can then arise when pushing out the first bales B1, B2 of the new fraction.

The Figures 6a - d show on a second design of a bale press that a further, second separation device TV2 can also be present, which separates the lower strand 200a again separately, so that two separation points TS1, TS2 on opposite sides with respect to the former front connection 201 exist, so both strands 200a, b have an end at which there is no longer a former front connection 201 that could get caught.

Since there are several vertical strappings Uv in the horizontal transverse direction to the pressing direction 10, the loops S of which must all be accessible for cutting, the second cutting device TV2 can only act from the top or bottom of the pressing channel 1, since in front of the front surface of the bale B1, around which the open loop S is guided, the preceding last bale Bz with the old fraction is located.

Accessibility from below is not optimal and due to the height of the space limited by the feet 20 of the base frame 20, the separating device must be designed to be correspondingly compact, as shown in solid lines. The separating planes T2u" and T2o" can be identical, but this is not the case with the solution shown.

In order to comply with the previously described conditions, the separating plane Tu" of the lower separating device TV2 must then be at a distance A2 in front of, i.e. downstream, from the binding plane A", which corresponds at least to the required protrusion length Üa, i.e. again at least corresponds to twice the travel distance VS of the drawing needle 8,200.

The separation level To" of the upper first separation device TV1 then no longer has to be located so far downstream, and can theoretically be arranged such a short distance downstream of the binding level A" that the distance A1 between them is only sufficient for the connection requirement VB, which is usually a few centimeters.

Figure 6b shows - realized by the first upper separating device TV1 and the second, lower separating device TV2 - the separation of the loop S in two places, namely on the top and on the bottom and in Figure 6c the resulting separation points TS 1 and TS 2 after cutting in the form of gaps in the former loop when the cutting tools TW are deactivated.

Figure 6d shows how the strands 200a, b at the top and bottom, each with a free end, remain lying along the top and bottom of the row of bales as the row of bales is pushed further forward.

The loop piece S*, which was cut out of the former loop S, usually remains between the bales Bz and B1 and is pushed forward with them until the bale Bz is removed from the end of the pressing channel 1.

Then the loop piece S* is freely accessible at the front of the bale B1 and can be removed or usually falls down from there by itself, i.e. one such loop piece S* from each of the vertical strapping levels Uv".

LIST OF REFERENCE SYMBOLS

1

press channel

1a - d

Canal wall

1.1

Beginning

1.2

End

1'

Channel direction

1"

cross-section

1'a

Connection page

2

Press plate

3a - d

Feeding unit

4

Stamp knife

5

String brake

6

Push-through unit, wire slider

7, 7.1, 7.2

Binding unit

8,100

cross-connector

8,200

cross-connector

9

Measuring device

10

Pressing direction, longitudinal direction

11

first transverse direction

12

second transverse direction

13

Supply spool

13*

pulley

20

Base frame

21

Press box

21a

Filling area

21b

Compaction area

22

bottleneck

23

plunger

24

counter knife

25

Filling shaft

26

Wall opening

27

Groove

100

Strapping medium

100a, b

strand

100a1

Strand piece

100b1

Strand piece

101

Front connection

102

Rear connection

200

strapping medium

200a, b

strand

200a1

Strand piece

200b1

Strand piece

201

Front connection

202

Rear connection

A"

binding level

A1, A2

Distance

b

bale

By, BZ

Bales of old material

BY, Bz

Bales of old material

B1, B2

Bales of new material

B1A

Bale start

BL

Bale length

bra

Bale height

P

Pressed material

S, S'

loop

S*

Loop piece

T1", T2"

dividing plane

TP

Separation position

T.S

Separation point

TW

Separating tool

TV1, TV2

Separating device

U

strapping

Uh, Uh

Strapping vertical/horizontal

Uh", Uh"

Strapping level vertical/horizontal

Üa, b

Overhang length

VB

Connection requirement

US

Distance

Claims (15)

1. Method for automatically activating and deactivating one or more individual, parallel, strapping(s) (U), that is to say a strapping plane (U"), in a baling press, in particular a baling channel press, in which method the strapping medium is in particular stocked in the form of virtually endless supply reels (13) at the baling press,
   characterised in that,

   A) for the deactivation of an individual strapping (for example Dv1),

   - the loop (S) for this strapping, said loop consisting of two strands (200a, b) that are joined together by a front connection (201), is automatically severed, in particular in its front region, at least once at at least one severing position (TP) that is positioned at the press channel (1) in such a way

   - that the two individual strands (200a, b) produced as a result of the severing each have an excess length (Üa, b) in a forward direction beyond the binding plane (A") which is sufficient to achieve that, when one strand (200a) is later transferred to the other strand (200b) along the binding plane (A"), the two strands (200a, b) reach one another again and can be automatically joined together,

   and,

   B) for the activation of an individual strapping (for example Uv1),

   - one strand (200a) is transferred to the other strand (200b) for this strapping along the binding plane (A") over a transfer distance (VS), and the two strands (200a, b) are automatically joined together again.
2. Method according to claim 1,
   characterised in that
   the excess lengths (Üa, b) are selected to be as short as possible.
3. Method according to any of the preceding claims,
   characterised in that

   - the loop (S) is automatically severed twice, specifically at severing points (TS) which are situated opposite one another in relation to the knot (K),

   - and the severing is performed in particular at in each case one of two different severing positions (TP).
4. Method according to any of the preceding claims,

   wherein the knot (K) is generally situated at or in the vicinity of the front upper transverse edge of the bale (B),

   characterised in that,

   for the deactivation of an individual vertical strapping (for example Uv1),

   - the upper strand (200b) is severed at a first severing point (TS 1) in the longitudinal portion of said strand (200b).
5. Method according to any of the preceding claims,
   characterised in that,
   for the deactivation of an individual vertical strapping (for example Uv1), the lower strand (200a) is severed at a second severing point (TS2) in the longitudinal portion of said strand (200a).
6. Method according to any of the preceding claims,
   characterised in that

   - the at least one severing position (TP) is provided downstream, in particular directly downstream, of the end of the press channel (1) in a pushing-through direction (10),
   and/or

   - all individual strappings of one strapping type, that is to say vertical or horizontal strapping, is performed simultaneously and/or at a severing position (TP) that is situated in the same severing plane for the particular strand (for example 200a, b).
7. Method according to any of the preceding claims,

   wherein the deactivation of one or more strappings is performed in response to a change in fraction of the material for pressing (P),

   characterised in that

   the severing of the strands of the at least one individual strapping (U) that is to be deactivated is performed on the loop (S) that leads around the front end of the first bale (B 1) of the new fraction.
8. Method according to any of the preceding claims,
   characterised in that

   - the excess length (Üa) of the strand (200a) that is to be transferred to the other strand (200b) prior to the knotting operation must be selected to correspond to at least twice the transfer distance (VS), that is to say including the connection allowance,
   and/or

   - the excess length (Üb) of the strand (200b) that is not to be transferred across prior to the knotting operation must be selected to correspond to at least the connection allowance.
9. Baling press, in particular baling channel press, for producing a pressed and strapped bale (B) of loose material for pressing, wherein the baling press comprises:

   - a base frame (20),

   - a press chamber (21),

   - a press channel (1) adjoining the press chamber (21) in a flush manner in a pressing direction (10) and formed by channel walls (1a, b, c, d) which peripherally delimit the press channel (1) and which extend in the pressing direction (10),

   - a pressing plate (2) which is movable back and forth in and counter to the pressing direction (10) in the press chamber (21), in particular as far as into the start (1.1) of the press channel (1),

   - at least one feed unit (3a - d) for at least in each case one, in particular virtually endless, strand (100a, 200a) of a strapping medium (100, 200) for strapping the pressed bale (B) in at least a horizontal and/or a vertical strapping plane (Uv''),

   - at least one transverse transfer means (8.100, 8.200), in particular a drawing needle (305), for transferring one strand (100a, 200a) of the strapping medium (100, 200) in the horizontal (11) or vertical transverse direction (12) with respect to the pressing direction (10) through the cross section (1") of the press channel (1) to the other strand (100b, 200b),

   - at least one binding unit (7.1, 7.2) for connecting the free ends of two strands (100a, b, or 200a, b) or strand portions (100a1, 100b1 or 200a1, 200b1), including a severing unit for the simultaneous or prior severing of the two strands (100a, b, or 200a, b) or strand portions,

   - a controller (C) that controls all moving parts of the baling press,

   characterised in that
   the baling press is designed to automatically activate and deactivate individual strappings, and in that the baling press has at least one severing device (TV1) for strapping medium at each activatable and deactivatable strapping plane (U").
10. The baling press according to claim 9,
    characterised in that
    the baling press has two severing devices (TV1, TV2) for strapping medium (100, 200) at each activatable and deactivatable strapping plane (U").
11. The baling press according to any of the preceding device claims,
    characterised in that,

    - in the case of vertical strapping planes (Uv"), the severing position (TP) at which the first severing device is situated is situated in the longitudinal portion of said strand (200b), in particular of the upper strand (200b),

    - in particular is offset rearward, in particular is offset rearward to the least possible extent, from the front connection (201) counter to the pressing direction (10).
12. The baling press according to any of the preceding device claims,
    characterised in that,
    in the case of vertical strapping planes (Uv"), the severing position (TP) at which the second severing device is situated

    - is situated either in the longitudinal portion of said strand (200a), in particular of the lower strand (200a),

    - or directly behind the front connection (201) in the direction of the supply reel of said strand (200a).
13. The baling press according to any of the preceding device claims,
    characterised in that

    - the first and/or the second severing device (TV1, TV2) is arranged in front of or in the end of the press channel (1) in the pressing direction (10),
    and/or

    - the first severing devices (TV1) for one strapping type, on the one hand, and/or the second severing devices (TV2) for said strapping type, on the other hand, have only one common severing drive in each case.
14. The baling press according to any of the preceding device claims,
    characterised in that

    - each individual severing device (TV) for each strand (100a, 100b, 200a, 200b) in a strapping plane (U") has a dedicated controllable severing drive,

    - and in particular, in the case of severing devices positioned in the same strapping plane (U") at the same severing position (TP) for the two strands in said strapping plane, said two severing devices have a common severing drive.
15. The baling press according to any of the preceding device claims,
    characterised in that

    - the excess length (Üa) from the severing device (TV) for the strand (200a), which is to be transferred to the other strand (200b) prior to a connecting operation, to the binding plane (A") corresponds to at least twice the transfer distance (VS), that is to say including the connection allowance (VB),
    and/or

    - the excess length (Üb) from the severing device for the strand (200b), which is not to be transferred across prior to a connecting operation, to the binding plane (A") corresponds at least to the connection allowance (VB).

Images