Assembly and method for manipulating string of successive medicament bags

Abstract

The present invention relates to an assembly (1) for handling a string (9) of medicament bags wherein the assembly (1) comprises: packaging means for packaging discrete medicaments in respective medicament bags; and a winding device (3) for winding said string on a reel (4) wherein the assembly further comprises a control unit (5) operatively connected to the packaging device (2) and to the winding device (5) wherein the control unit is arranged to:-receive one or more packaging status signals from the packaging device (2), and transmitting one or more winding control signals to the winding device (3) in response to said one or more packaging status signals; and / or-receiving one or more winding status signals from the winding device (3) and sending one or more packaging control signals to the packaging device (2) in response to said one or more winding status signals.

Description

Background Art

[0001] The present invention relates to an assembly for manipulating a string of consecutive medicament bags. The present invention further relates to a method for manipulating a string of consecutive medicament bags using the assembly. Summary of the invention

[0002] The object of the present invention is to provide an assembly and a method for manipulating a string of consecutive medicament bags, in which assembly and method the manipulation of the string of consecutive medicament bags can be improved.

[0003] According to a first aspect, there is provided an assembly for manipulating a string of continuous medicament bags, wherein the assembly comprises: a packaging device for packaging discrete medicaments in respective medicament bags in the string; a winding device for receiving the string from the packaging device and winding the string on a reel; and a control unit operatively connected to the packaging device and the winding device, wherein the control unit is arranged to:

[0004] - receiving one or more packaging status signals from the packaging device and sending one or more winding control signals to the winding device in response to the one or more packaging status signals; and / or

[0005] - receiving one or more winding status signals from the winding device and sending one or more packaging control signals to the packaging device in response to the one or more winding status signals.

[0006] In other words, the control unit is operatively, electronically and / or functionally connected to provide a form of communication between the winding device and the packaging device. Depending on the system, this can be wired communication or wireless communication. Therefore, in response to the state of the detected packaging device, the control unit can control the winding device to take appropriate action, and vice versa. For example, when a fault is detected at the winding device, the string can be interrupted to pass through the packaging unit to prevent the string of large lengths from accumulating between the packaging device and the winding device. In addition, a string of continuous medicine bags is wound on a reel and can be automatically adapted to output the string from the packaging device. Similarly, a string of continuous medicine bags is output at the packaging device and can be automatically adapted to be wound on a reel. Therefore, the string can be more reliably manipulated and / or the excessive force that may break or damage the string can be prevented.

[0007] The control unit is further arranged to determine, based on the one or more winding status signals, a winding status indicating one or more of:

[0008] - an error in the transport of the string between the packaging unit and the winding unit;

[0009] - the difference between the delivery speed of the string at the packaging output of the packaging device and the winding speed of the string at the reel;

[0010] -The reels are full; and / or

[0011] - Malfunction of the winding device.

[0012] For example, the control unit can be arranged to determine the first winding state based on one or more winding state signals, wherein the first winding state indicates that an error occurs when conveying the string between the packaging output and the reel. In particular, the first winding state can indicate that the string is not correctly connected to the reel or does not exist at all at the winding device. In the case of the first winding state, the packaging device will continue to output a string of medicine bags, and the string is not wound on the reel. Therefore, a section of the string will be output on the floor, thereby producing an intractable tangle. In addition, the string may be damaged in the process. The control unit can detect this state so that the control unit can take and / or guide appropriate action.

[0013] Additionally or alternatively, the control unit may be arranged to determine a second winding state based on the one or more winding state signals, wherein the second winding state indicates that the winding speed at the reel is higher than the output speed of the string at the packaging output. This speed difference may stretch the string and eventually break or rupture the string. The control unit may detect this state so that the control unit may take and / or direct appropriate action.

[0014] Additionally or alternatively, the control unit may be arranged to determine a third winding state based on the one or more winding state signals, wherein the third winding state indicates that the winding speed at the reel is lower than the output speed of the string at the packaging output. In the third winding state, the tension in the string is reduced. In particular, the string may sag, which may ultimately result in the string being output on the factory floor. This may result in a string of medicine bags being damaged. The control unit may detect this state so that the control unit can take and / or direct appropriate action.

[0015] Additionally or alternatively, the control unit may be arranged to determine a fourth winding state based on the one or more winding state signals, wherein the fourth winding state indicates that the reel is full. When the reel is full, the string should be cut and the front end of the resulting string should be coupled to another reel. Accordingly, the full reel may be replaced with an empty reel. The control unit may detect this state so that the control unit may take and / or direct appropriate actions.

[0016] Additionally or alternatively, the winding device may be arranged to determine a fifth winding state based on the one or more winding state signals, wherein the fifth winding state indicates a fault of the winding device. The control unit may thus detect a fault or error in the winding device so that the control unit may take and / or direct appropriate action.

[0017] In an embodiment thereof, the control unit is programmed to generate a packaging control signal in response to the detected winding state, the packaging control signal comprising one or more of the following instructions:

[0018] - stopping the packaging device from conveying the string;

[0019] - increasing the output speed of the string at the packaging output; and / or

[0020] - Reducing the output speed of the string at the packaging output.

[0021] For example, the control unit may be arranged to send a first packaging control signal to the packaging device in response to determining the first winding state, wherein the first packaging control signal comprises an instruction for stopping the packaging device from conveying the string. The first packaging control signal generated by the control unit may control the packaging device to take appropriate actions, such as stopping the packaging device from conveying the string. Thus, the above disadvantages may be prevented.

[0022] Additionally or alternatively, the control unit may be arranged to send a second packaging control signal to the packaging device in response to determining the fourth winding state, wherein the second packaging control signal includes an instruction for stopping the packaging device from conveying the string. The control unit may further send a winding feedback signal to the winding device to stop winding the string on the reel. Therefore, when the reel is full, the conveying of the string may be automatically paused. This may allow an operator or another device to replace the filled reel and connect the series to another reel.

[0023] In another embodiment thereof, the control unit is further programmed to generate a winding feedback signal which is sent back to the winding device in response to the detected winding status.

[0024] In another embodiment thereof, the winding feedback signal includes one or more of the following instructions:

[0025] - stopping the winding device from winding the string;

[0026] - Increase the winding speed of the string at the reel;

[0027] - reducing the winding speed of the string at the reel; and / or

[0028] -Reverse the winding direction of the reel.

[0029] For example, the control unit may be arranged to send a first winding feedback signal or another winding control signal to the winding device in response to determining the second winding state, wherein the first winding feedback signal or another winding control signal comprises an instruction for causing the winding device to reduce the winding speed at the reel. Thus, the control unit may automatically take appropriate action to prevent the string from breaking or rupturing.

[0030] Additionally or alternatively, the control unit may be arranged to send a second winding feedback signal or another winding control signal to the winding device in response to determining the third winding state, wherein the second winding feedback signal or another control signal comprises an instruction for causing the winding device to increase the winding speed at the reel. Thus, the control unit may automatically take appropriate action upon detecting a decrease in the tension of the string.

[0031] Additionally or alternatively, the control unit may be arranged to send a third winding feedback signal or another winding control signal to the winding device in response to determining the fifth winding state, wherein the third winding feedback signal or another winding control signal comprises an instruction for driving the reel to rotate in a direction opposite to the winding direction for a predetermined time interval. In other words, the string is at least partially unwound from the reel. Thus, the tension in the string may be reduced. The unwinding of the string may allow an operator to access the winding device. Furthermore, by reducing the tension in the string, the safety of the operator may be increased. Additionally, the string may be prevented from tearing.

[0032] In another embodiment, the winding device includes one or more sensors, which are operatively connected to the control unit for detecting the presence or absence of a string of continuous medication bags. The one or more sensors can detect the presence or absence of the string along the string track at the corresponding position. The presence or absence of the string detected by one of the one or more sensors can be used as a winding state signal. The control unit can be arranged to detect the presence of the string at the winding device based on the winding state signal. Accordingly, the control unit can detect the winding state (such as one of the exemplary winding states as described above), and can send a packaging control signal to the packaging device in response.

[0033] In an embodiment thereof, the winding device comprises a dancer roller defining at least a portion of the string trajectory between the packaging output and the reel, wherein the dancer roller is movable between a first position and a second position, wherein the dancer roller is biased towards the first position, wherein the dancer roller is arranged to be displaced towards the second position under the influence of a passing string, and wherein the one or more sensors comprise a dancer roller sensor or a first sensor, which is arranged to detect the presence of the dancer roller in at least one of the first position and the second position. The dancer roller sensor may be, for example, a proximity sensor. In other words, the control unit may conveniently detect the absence of the string at the winding device based on the position of the dancer roller.

[0034] For example, the control unit may be arranged to determine the first winding state when the dancer roller sensor detects that the dancer roller is present in the first position.

[0035] In another embodiment, the one or more sensors include a second sensor arranged to detect the presence or absence of the string along the desired string trajectory. The second sensor may, for example, be an optical sensor. The sensor along the desired string trajectory may conveniently detect the absence of the string and / or a deviation of the path of the string from the desired trajectory.

[0036] For example, the control unit may be arranged to determine the first winding state when the second sensor detects that no string is present.

[0037] Additionally or alternatively, the control unit may be arranged to determine the second winding state when the second sensor detects that the string is not present and the dancer roller sensor detects that the dancer roller is not present in its first position. In other words, an increased tension in the string caused by a winding speed of the string at the reel being greater than an output speed of the string at the packaging output may be detected by the combined winding state signal of the first sensor and the second sensor.

[0038] Additionally or alternatively, the control unit may be arranged to determine the third winding state when the second sensor detects the presence of the string and the dancer roller sensor detects the presence of the dancer roller in its first position. The second sensor may detect the presence of the string at the winding device compared to the first winding state. However, the dancer roller sensor may detect that the tension in the string is insufficient to displace the dancer roller. Thus, the control unit may reliably determine the third winding state. Furthermore, the control unit may reliably distinguish the third winding state from the first winding state.

[0039] In another embodiment, the one or more sensors include a path sensor or a second sensor arranged to detect the presence or absence of a loop of the string outside (e.g., hanging below) the expected string trajectory. Optionally, the path sensor is an optical sensor. The path sensor can conveniently detect the presence of the loop.

[0040] When the expected string trajectory does not comprise said loop, the control unit may for example be arranged to determine the third winding state when the path sensor detects the presence of said loop of the string.

[0041] In another embodiment, the one or more sensors include a reel sensor or a third sensor arranged to detect the amount of a string of consecutive medication bags wound on the reel. The reel sensor may be, for example, a load cell for detecting the weight of the reel. Alternatively, the reel sensor may be a distance sensor for detecting the radius of the string wound on the reel. The control unit may be arranged to determine the fourth winding state when the detected amount of the string exceeds a predetermined threshold.

[0042] In another embodiment, the winding device further comprises a winding drive for driving the reel to rotate and a torque sensor for measuring the torque of the winding drive. When the string is not connected to the reel, the winding drive only rotates the reel, which may produce a reduced torque. Therefore, it can be easily detected that there is no string at the reel. The control unit can be arranged to determine the first winding state when the torque of the winding drive is below a predetermined threshold.

[0043] In another embodiment, the control unit is arranged to determine a packaging status based on one or more packaging status signals, the packaging status indicating one or more of the following:

[0044] - the sealing unit of the packaging device is opened;

[0045] - an error in the transport of the string between the packaging unit and the winding unit;

[0046] - the difference between the delivery speed of the string at the packaging output of the packaging device and the winding speed of the string at the reel;

[0047] -The reels are full; and / or

[0048] - Malfunction of the packaging device.

[0049] In an embodiment thereof, the control unit is programmed to generate a winding control signal in response to the detected packaging state, the winding control signal comprising one or more of the following instructions:

[0050] - stopping the winding device from winding the string;

[0051] - Increase the winding speed of the string at the reel;

[0052] - reducing the winding speed of the string at the reel; and / or

[0053] -Reverse the winding direction of the reel.

[0054] For example, the control unit may be arranged to send a first winding control signal to the winding device in response to determining the first packaging state, wherein the first winding control signal comprises an instruction for stopping the winding device from winding the string onto the reel. Thus, the control unit may automatically or autonomously take appropriate action in response to the first packaging state. By stopping winding the string onto the reel, string tensioning or eventual rupture may be prevented.

[0055] In an embodiment thereof, the control unit is further programmed to generate a packaging feedback signal in response to the detected packaging status which is sent back to the packaging device.

[0056] In another embodiment thereof, the packaging feedback signal includes one or more of the following instructions:

[0057] - stopping the packaging device from conveying the string;

[0058] - increasing the output speed of the string at the packaging output; and / or

[0059] - Reducing the output speed of the string at the packaging output.

[0060] In another embodiment, the winding device comprises a winding drive for driving the reel to rotate in a winding direction to wind the string onto the reel.

[0061] In another embodiment, the packaging device comprises a packaging drive for conveying the string through the packaging device.

[0062] In another embodiment, the control unit includes: a non-transitory computer-readable medium, which includes instructions for processing one or more winding status signals and / or one or more packaging status signals and in response, generating corresponding one or more winding control signals and / or one or more packaging control signals; and a processing unit, which is used to execute the instructions.

[0063] According to a second aspect, the invention relates to a method for manipulating a string of consecutive medicament bags using an assembly according to the first aspect of the invention, wherein the method comprises the following steps:

[0064] - receiving one or more packaging status signals from the packaging device and sending one or more winding control signals to the winding device in response to the one or more packaging status signals; and / or

[0065] - receiving one or more winding status signals from the winding device and sending one or more packaging control signals to the packaging device in response to the one or more winding status signals.

[0066] In other words, the method involves communicating between the winding device and the packaging device. Thus, in response to the detected state of the packaging device, appropriate actions can be taken at the winding device, and vice versa. Thus, winding a string of continuous medication bags on a reel can be adapted to outputting the string from the packaging device. Correspondingly, outputting a string of continuous medication bags at the packaging device can be adapted to winding the string on a reel. Thus, the string can be more reliably manipulated. Furthermore, excessive forces that could break or damage the string can be prevented.

[0067] In an embodiment thereof, the method further comprises the step of determining a winding state indicating one or more of the following based on the one or more winding state signals:

[0068] - an error in the transport of the string between the packaging unit and the winding unit;

[0069] - the difference between the delivery speed of the string at the packaging output of the packaging device and the winding speed of the string at the reel;

[0070] -The reels are full; and / or

[0071] - Malfunction of the winding device.

[0072] In another embodiment, the method further comprises the step of generating a packaging control signal in response to the detected winding state, the packaging control signal comprising one or more of the following instructions:

[0073] - stopping the packaging device from conveying the string;

[0074] - increasing the output speed of the string at the packaging output; and / or

[0075] - Reducing the output speed of the string at the packaging output.

[0076] In another embodiment thereof, the method comprises stopping the packaging device from conveying the string in response to a winding state indicating an error in conveying the string between the packaging output and the reel. In the event of an error in conveying the string between the packaging output and the reel, the packaging device will continue to convey a string of medication bags without the string being wound on the reel. As a result, a section of the string will be conveyed on the floor, thereby creating an unmanageable tangle. Furthermore, the string may be damaged in the process. Stopping the packaging device from conveying the string may be an appropriate action to prevent the above-mentioned disadvantages.

[0077] In another embodiment, the method includes increasing the output speed of the string at the packaging output of the packaging device in response to a winding state indicating that the winding speed at the reel is higher than the output speed of the string. This speed difference can stretch the string and eventually break or rupture the string. Increasing the output speed at the reel can prevent the string from breaking or rupturing.

[0078] In another embodiment, the method includes reducing the output speed of the string at the packaging output of the packaging device in response to a winding state indicating that the winding speed at the reel is lower than the output speed of the string. In this particular winding state, the string may sag, which may ultimately cause the string to be output on the factory floor. This may cause a string of medication bags to be damaged. By reducing the output speed, the sag of the string can be prevented.

[0079] In another embodiment, the method includes stopping the packaging device from conveying the string in response to the reel being full. When the reel is full, the string should be cut and the front end of the resulting string should be connected to another reel. Accordingly, the full reel can be replaced with an empty reel. The method includes pausing the conveying of the string when the reel is full. This can allow an operator or another device to replace the full reel and connect the string to another reel.

[0080] In another embodiment, the method further comprises the following steps: generating a winding feedback signal in response to the detected winding state, and sending the winding feedback signal to the winding device. Optionally, the winding feedback signal comprises one or more of the following instructions:

[0081] - stopping the winding device from winding the string;

[0082] - Increase the winding speed of the string at the reel;

[0083] - reducing the winding speed of the string at the reel; and / or

[0084] - Reversing the winding direction of the reel. Thus, in addition to or instead of the packaging control signal, a winding feedback signal may be sent to the winding device. Accordingly, appropriate action in response to the detected winding state may be taken at the packaging device, at the winding device, or at both the packaging device and the winding device.

[0085] In another embodiment thereof, wherein the method comprises reducing the winding speed at the reel in response to a winding state indicating that the winding speed at the reel is higher than the output speed of the string at the packaging output of the packaging device. This speed difference may stretch the string and eventually break or rupture the string. Reducing the winding speed at the reel may prevent the string from breaking or rupturing.

[0086] In another embodiment, the method includes increasing the winding speed at the reel in response to a winding state indicating that the winding speed at the reel is lower than the output speed of the string at the package output of the packaging device. In this particular winding state, the string may sag, which may ultimately cause the string to be output on the factory floor. This may cause a string of medication bags to be damaged. By increasing the winding speed, the sag of the string can be prevented.

[0087] In another embodiment, the method comprises rotating the reel in a direction opposite to the winding direction for a predetermined time interval in response to a failure of the winding device. In other words, the string is at least partially unwound from the reel. Thus, the tension in the string can be reduced. The unwinding of the string can allow an operator to access the winding device. Furthermore, by reducing the tension in the string, the safety of the operator can be increased.

[0088] In another embodiment, the method comprises the step of determining a packaging status based on the one or more packaging status signals, the packaging status indicating one or more of the following:

[0089] - the sealing unit of the packaging device is opened;

[0090] - an error in the transport of the string between the packaging unit and the winding unit;

[0091] - the difference between the delivery speed of the string at the packaging output of the packaging device and the winding speed of the string at the reel;

[0092] -The reels are full; and / or

[0093] - Malfunction of the packaging device.

[0094] In an embodiment thereof, the method further comprises generating a winding control signal in response to the detected packaging state, the winding control signal comprising one or more of the following instructions:

[0095] - stopping the winding device from winding the string;

[0096] - Increase the winding speed of the string at the reel;

[0097] - reducing the winding speed of the string at the reel; and / or

[0098] -Reverse the winding direction of the reel.

[0099] In another embodiment thereof, the method comprises stopping the winding device from winding the string on the reel in response to a malfunction of the packaging device.By stopping the string from being wound on the reel, tension or eventual rupture of the string can be prevented.

[0100] In another embodiment, the method further comprises the following steps: generating a packaging feedback signal in response to the detected packaging state and sending the packaging feedback signal back to the packaging device. Optionally, the packaging feedback signal comprises one or more of the following instructions:

[0101] - stopping the packaging device from conveying the string;

[0102] - increasing the output speed of the string at the packaging output; and / or

[0103] - Reducing the output speed of the string at the packaging output.

[0104] According to a third aspect, the invention relates to a computer readable medium having computer executable instructions adapted to cause a control unit of the invention to perform a method of the invention. The computer readable medium implements the method of the invention. Therefore, the same advantages as above also apply.

[0105] The various aspects and features described and shown in this specification can be applied separately wherever possible. These individual aspects, in particular the aspects and features described in the attached dependent claims, can become the subject of divisional patent applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] The invention will be explained on the basis of exemplary embodiments shown in the accompanying drawings, in which:

[0107] Figures 1 to 4 An assembly including components according to an embodiment of the present invention is shown during exemplary process steps;

[0108] Figure 5 Shown according to Figure 1 A detailed view of the connection between the reel and the winding device in the middle circle V; and

[0109] Figure 6 and Figure 7 Shows Figure 5 Detail of the front view under different operating conditions. DETAILED DESCRIPTION

[0110] Figures 1 to 4 An assembly 1 for manipulating a string 9 of continuous medicament bags is shown. The assembly 1 comprises a packaging device 2 for packaging discrete medicaments in individual medicament bags of the string 9. The assembly 1 further comprises a winding device 3 for receiving the string 9 from the packaging device 2 and winding the string 9 on a reel 4.

[0111] like Figures 1 to 4As further shown in FIG. 1 , the packaging device 2 comprises a filling station 23 for filling the corresponding continuous medicine bags in the string 9. In particular, the filling station 23 is arranged to distribute a predetermined amount of discrete medicine into the corresponding medicine bags. The packaging device 2 further comprises a sealing station 22 for sealing the filled medicine bags.

[0112] The packaging device 2 further comprises a packaging output 21 for outputting a string of 9 consecutive medicine bags. The packaging device 2 comprises a packaging drive 26 for conveying a string of 9 consecutive medicine bags through the packaging device 2. In particular, the packaging drive 26 is arranged to convey a string of 9 consecutive medicine bags through the filling station 23 and the sealing station 22 to the packaging output 21.

[0113] Typically, a long web (not shown) is fed to the packaging device 2 to form a string of 9 consecutive medication bags. The packaging device 2 can be arranged to form at least a portion of the corresponding medication bags in the long web, for example by applying a series of heat seals to the long web. Alternatively, the bags can be pre-formed in the long web before the web is fed to the packaging machine 2.

[0114] The packaging drive 26 is typically arranged to intermittently convey a string 9 of continuous medication bags to allow the medication to be conveyed into the corresponding bags in the string 9 at the filling station 23, and / or to allow the corresponding bags in the string 9 to be securely sealed at the sealing station 22. The packaging drive 26 may include a buffer mechanism (not shown), such as a slack adjuster, to mitigate the intermittent conveyance of the string 9 at the packaging output 21. In particular, such a buffer mechanism may allow a constant or substantially constant output of the string 9 at the packaging output 21.

[0115] like Figures 1 to 4 As shown, the reel 4 is provided with a central hub or reel hub 40 extending along a central axis A. The reel 4 further comprises two flanges 42. The flanges 42 are spaced apart in an axial direction parallel to the central axis A for limiting the string in said axial direction. The flanges 42 are connected to the reel hub 40 and extend away from said hub 40 in a radially outward direction relative to the central axis A.

[0116] like Figures 5 to 7 As can be best seen in the figure, the reel hub 40 further comprises a support surface 400 for receiving the string 9. The support surface 400 extends circumferentially around the central axis A. The reel 4 further comprises a clamp 41 for clamping the front end of the string 9 to the support surface 400. The clamp 41 is rotatable about a clamp axis B. The clamp axis B is parallel to the central axis A. In particular, the clamp axis B is spaced apart from the central axis A. Optionally, the clamp 41 is biased towards the support surface 400.

[0117] The winding device 3 comprises a coupling member 30 for receiving the reel 4. The coupling member 30 comprises a drive shaft 300 for driving the reel 4 to rotate around the central axis A. Figure 6 and Figure 7 As shown, the drive shaft 300 is a keyed drive shaft 300, which includes a notch, cam or key 301 protruding from the drive shaft 300 in a radial direction transverse to or perpendicular to the central axis A. Alternatively, the drive shaft 300 may, for example, include a plurality of notches, cams or keys 301 distributed circumferentially around the central axis A. The notches, cams or keys 301 are arranged to engage with the reel 4 to drive the reel 4 to rotate together with the drive shaft 300.

[0118] like Figures 5 to 7 As further shown, the coupling member 30 includes a retaining member 302 for retaining the reel in an axial direction parallel to the central axis A. The retaining member 302 is movable to a retaining position, in which the retaining member 302 radially protrudes from the drive shaft 300. In this particular embodiment, the retaining member 302 is further movable to a retracted position, in which the retaining member 302 does not protrude from the drive shaft 300, and the reel 4 is released from the coupling member 30. In particular, the retaining member 302 is spring-loaded to the retaining position. Therefore, the reel can be conveniently removed by counteracting the spring load on the retaining member 302 and then sliding the reel 4 on the drive shaft 300.

[0119] like Figures 5 to 7 As further shown in the figure, the reel 4 is provided with a central hole extending through the reel hub 40 along the central axis A to receive the coupling member 30 of the winding device 3. The reel 4 comprises one or more grooves or keyways 401 for receiving the notch or key 301 of the coupling member 30. In this particular embodiment, the grooves or keyways 401 are distributed circumferentially around the central axis A. In particular, the grooves or keyways 401 are evenly distributed around the central axis A.

[0120] Preferably, the retaining member 302 is displaced in the circumferential direction relative to the cam, notch or key 301 so that the retaining member 302 is not aligned with the groove or keyway 401 of the reel 4.

[0121] In this particular embodiment, the winding device 3 comprises a winding drive 6 for driving the coupling member 30 in rotation. Alternatively, the reel 4 can be driven in rotation, for example, by an external drive acting on the outer peripheral surface of the reel 4. For example, the external drive can be attached to the outer edge of one or both of the flanges 42.

[0122] The winding device 3 further comprises a series of rollers 34, 35, 36 for guiding a string of 9 consecutive pharmaceutical bags along a string track S. The string track S extends between the packaging output 21 and the reel 4. The rollers 34, 35, 36 comprise a first guide roller 34, a second guide roller 35 and a dancer roller 36, which is located between the first guide roller 34 and the second guide roller 35 along the string track S. The dancer roller 36 can be in a first position (e.g. Figure 3 The dancer roller 36 is arranged to move between a first position and a second position, the second position being spaced a distance from the first position. Optionally, the dancer roller 36 is biased towards the first position. The dancer roller may be biased, for example, by a biasing element, such as a spring, or under the influence of gravity. In particular, the dancer roller 36 is arranged to shift towards the second position under the influence of a passing string 9.

[0123] The winding device comprises a first sensor 31 or dancer roller sensor for monitoring the position of said dancer roller 36. In particular, the first sensor 31 is arranged to detect the presence of the dancer roller 36 in the first position. The first sensor 31 may for example be a limit sensor.

[0124] Alternatively, the dancer roller 36 may be locked in the first position. Thus, in the first position, the dancer roller 36 may passively tension the string 9, for example by guiding the string 9 along an S-curve in cooperation with the first guide roller 34 and the second guide roller 35. The dancer roller 36 may further be unlocked and moved to or towards the second position to facilitate mounting or unmounting the string 9 on or from the reel 4.

[0125] like Figure 1 and Figure 2 As can be best seen in FIG. 1 , the winding device 3 comprises a second sensor 32 or path sensor arranged along the string track S for detecting the presence or absence of the string 9. Figure 1 and Figure 2 As further shown in FIG. 1 , the string track S is arranged to form a loop between the packaging output 21 and the first guide roller 34 of the winding device 3. Preferably, the loop is formed at or near the first guide roller 34. Figure 1 and Figure 2 As shown, the second sensor 32 is arranged along the string track S so that the second sensor 32 can detect the presence or absence of the ring or the surplus of the string 9. In particular, the second sensor 32 is arranged below the first guide roller 34.

[0126] exist Figure 1 , a state in which a loop is formed in the string 9 is shown, and the loop passes in front of the second sensor 32. Accordingly, the second sensor 32 can detect the presence of the string 9. Figure 2A state is shown in which the string 9 is tensioned and therefore does not pass in front of the second sensor. Accordingly, the second sensor can detect the absence of said string 9. Preferably, the second sensor 32 comprises an optical sensor.

[0127] like Figures 1 to 4 As further shown, the winding device 3 comprises a third sensor 33 or a reel sensor for detecting the amount of string 9 wound on the reel 4. The third sensor 33 may be, for example, a distance sensor. Alternatively, the third sensor 33 may be, for example, a force sensor for measuring the mass of the reel 4.

[0128] The winding device 3 may comprise one or more additional sensors for detecting process parameters of the winding device 3. For example, the winding device 3 may comprise a torque sensor (not shown) for measuring the torque of the winding drive 6.

[0129] The assembly 1 further comprises a control unit 5, which is operatively connected to the packaging device 2 and the winding device. In particular, the control unit 5 is operatively connected to the first sensor 31, the second sensor 32 and the third sensor 33 of the winding device 3. The control unit is further connected to the winding drive 6 of the winding device 3 and the packaging drive 26 of the packaging device 2. The control unit 5 may be connected to further sensors and / or drives (not shown).

[0130] The control unit 5 is arranged to communicate between the packaging device 2 and the winding device 3. Additionally, the control unit 5 may be arranged to provide feedback to the packaging device 2, the winding device 3, or both. In particular, the control unit 5 is arranged to receive one or more packaging status signals from the packaging device 2, and to send one or more winding control signals to the winding device 3 in response to the one or more packaging status signals. Accordingly, the control unit 5 is arranged to receive one or more winding status signals from the winding device 3, and to send one or more packaging control signals to the packaging device 2 in response to the one or more winding status signals.

[0131] In particular, the control unit 5 is arranged to determine one or more winding states based on one or more winding state signals received. The control unit 5 is further arranged to determine one or more packaging states based on one or more packaging state signals received. The control unit 5 is programmed to generate a corresponding packaging control signal and / or a corresponding winding feedback signal in response to the corresponding winding state. Accordingly, the control unit 5 is programmed to generate a corresponding winding control signal and / or a corresponding packaging feedback signal in response to the corresponding packaging state.

[0132] A non-exhaustive number of examples of winding states and packaging states are described in more detail below:

[0133] The control unit 5 may be arranged to determine a first winding state indicating that an error has occurred in conveying the string 9 between the packaging output and the reel 4, for example the string 9 may not be coupled to the reel. For example, the first winding state may be determined when the first sensor 31 detects that the dancer roller 36 is present in the first position. Additionally or alternatively, when the desired string trajectory S includes a loop located at or near the second sensor 32, the first winding state may be determined when the second sensor 32 detects that the loop of the string 9 is not present. Optionally, the control unit 5 may be programmed to determine the first winding state only when the first sensor 31 detects that the dancer roller 36 is in the first position and the second sensor 32 detects that the string 9 is not present.

[0134] Additionally or alternatively, the control unit 5 may be arranged to measure the torque of the winding drive 6. The control unit 5 may be programmed to determine the first winding state when the torque of said winding drive 6 is below a predetermined threshold.

[0135] The control unit 5 is programmed to generate a first packaging control signal in response to detecting the first winding state. The control unit 5 is arranged to send the first packaging control signal to the packaging device 2. The first packaging control signal may, for example, include an instruction for stopping the packaging drive 26 conveying string 9. Additionally, the first packaging control signal may include instructions for stopping the sealing station 22 from sealing the medication bag and the filling station 23 from filling the medication bag, respectively.

[0136] The control unit 5 may further be arranged to determine a second winding state indicating that the winding speed at the reel 4 is higher than the output speed of the string 9 at the packaging output 21. The second winding state may be determined, for example, when the second sensor 32 detects the absence of the string 9 and the first sensor 31 detects the absence of the dancer roller 36 in the first position, i.e. when the dancer roller 36 is displaced towards the second position by the passing string 9.

[0137] The control unit 5 is programmed to generate a first winding feedback signal or another winding control signal in response to the second winding state. The control unit 5 is arranged to send the first winding feedback signal or another winding control signal to the winding device 3. The first winding feedback signal or another control signal may, for example, include an instruction for causing the winding drive 6 to reduce the winding speed at the reel 4.

[0138] Additionally or alternatively, the control unit 5 may be programmed to generate a packaging control signal in response to the second winding state. The packaging control signal may include instructions for causing the packaging device 2 to increase the output speed of the string 9 at the packaging output 21 .

[0139] The control unit 5 may further be arranged to determine a third winding state indicating that the winding speed at the reel 4 is lower than the output speed of the string 9 at the packaging output 21. When the desired string trajectory S does not include a loop located at or near the position of the second sensor 32, the control unit 5 may be arranged to determine the third winding state when the second sensor 32 detects the presence of said loop of the string 9. Alternatively, when the desired string trajectory S includes a loop located at or near the position of the second sensor 32, the control unit 5 may be arranged to determine the third winding state when the second sensor 32 detects the presence of the string 9 and the first sensor 31 detects the presence of the dancer roller 36 in its first position. This may be the case, for example, when the string 9 is correctly connected to the reel 4 but the tension in the string is insufficient to shift the dancer roller 36 away from the first position.

[0140] The control unit 5 is programmed to generate a second winding feedback signal or another winding control signal in response to the third winding state. The control unit 5 is arranged to send the second winding feedback signal or another winding control signal to the winding device 3. The second winding feedback signal or another winding control signal may, for example, include an instruction for causing the winding drive 6 to increase the winding speed at the reel 4.

[0141] Additionally or alternatively, the control unit 5 may be programmed to generate a packaging control signal in response to the third winding state. The packaging control signal may include instructions for causing the packaging device 2 to reduce the output speed of the string 9 at the packaging output 21 .

[0142] The control unit 5 may further be arranged to determine a fourth winding state, which indicates that the reel 4 is full. The control unit 5 may, for example, be arranged to determine the fourth winding state when the amount of string 9 detected by the third sensor exceeds a predetermined threshold. For example, when the third sensor 33 is a force sensor, the predetermined threshold may correspond to the maximum filling weight of the reel. Accordingly, the control unit may be arranged to determine another winding state indicating that the reel 4 is not present when the third sensor 33 detects a weight below a predetermined threshold.

[0143] The control unit 5 is arranged to generate a second packaging control signal in response to the fourth winding state. The control unit 5 is arranged to send the second packaging control signal to the packaging device 2. The second packaging control signal may, for example, include an instruction for stopping the packaging drive 26 conveying string 9. Additionally, the first packaging control signal may include instructions for stopping the sealing station 22 from sealing the medication bag and the filling station 23 from filling the medication bag, respectively.

[0144] The control unit 5 may further be arranged to determine a fifth winding state indicating a fault of the winding device 3. The winding device 3 may for example be arranged to generate a winding state signal indicating an error or fault of said winding device 3, such as the reel 4 not being present or the reel 4 not being correctly coupled to the coupling member.

[0145] The control unit 5 is programmed to generate a third winding feedback signal or another winding control signal in response to the fifth winding state. The control unit 5 is arranged to send the third winding feedback signal or another winding control signal to the winding device 3. The third winding feedback signal or another winding control signal includes an instruction for driving the reel 4 to rotate in a direction opposite to the winding direction for a predetermined time interval. In other words, the feedback signal includes an instruction for unwinding the reel 4. Unwinding the reel can allow the operator to check for errors in the winding device 3 without being blocked by the string 9.

[0146] The control unit 5 may further be arranged to determine a first packaging state indicating a malfunction of the packaging device 2. Similar to the winding device 3, the packaging device 2 may be arranged to generate a packaging state signal indicating an error or malfunction of the packaging device 2. For example, the sealing station 22 may be blocked or a discrete medicament may block an orifice in the filling station 23.

[0147] The control unit 5 is programmed to generate a first winding control signal in response to the first packaging state. The control unit 5 is arranged to send the first winding control signal to the winding device 3. The first winding control signal may for example comprise an instruction for stopping the winding device 3 from winding the string 9 onto the reel 4. Additionally, the control unit may be programmed to send a packaging feedback signal or another packaging control signal to the packaging device 2, comprising an instruction for stopping the conveyance of the string 9 through the packaging device.

[0148] Now we will use Figures 1 to 4 Exemplary method steps of the method according to the invention are described.

[0149] Figure 1 The assembly 1 is shown in a situation in which the amount of string 9 output at the packaging output 21 is greater than the amount of string 9 wound on the reel 4. As a result, the string 9 sags between the packaging output 21 and the second guide roller 35. In other words, a loop or surplus of string 9 is formed along the string trajectory S. Said loop of string 9 is detected by the second sensor 32, which sends a winding state signal to the control unit 5, which indicates that string 9 is present at said first sensor 32.

[0150] exist Figure 1, the string 9 has been correctly coupled to the reel 4. Therefore, the portion of the string 9 that passes through the dancer roller 36 displaces the dancer roller 36 away from its first position. Therefore, the first sensor 31 does not detect the dancer roller 36 in the first position and sends a winding state signal to the control unit 5 indicating that the first dancer roller 36 is not present in the first position.

[0151] The control unit 5 can now determine that the winding device 3 is in the third winding state, indicating that the winding speed at the reel is lower than the output speed at the packaging output 21. In response, the control unit 5 generates a second winding feedback signal. Accordingly, the control unit 5 sends an instruction to the winding drive 6 to increase the winding speed. Alternatively, the control unit 5 can send an instruction to the packaging drive 26 to reduce the conveying speed of the string through the packaging device 2.

[0152] In an alternative configuration of the control unit 5, Figure 1 A normal operating state of the assembly 1 can be depicted. In this case, a loop in the string trajectory S at the second sensor is expected. In this alternative configuration of the control unit 5, when the second sensor 32 detects that the string 9 is not present at the second sensor 32, the control unit can detect a second winding state indicating that the winding speed at the reel 4 is higher than the output speed of the string 9 at the packaging output 21. Correspondingly, when the first sensor 31 detects that the dancer roller 36 is present in the first position, the control unit can detect a third winding state indicating that the winding speed at the reel 4 is lower than the output speed of the string 9 at the packaging output 21.

[0153] Figure 2 The assembly 1 is shown in a state where the reel 4 is filled. The third sensor 33 sends a winding state signal to the control unit 5, which indicates that the amount of string 9 on the reel 4 exceeds a predetermined threshold. Accordingly, the control unit 5 detects a fourth winding state. In response, the control unit 5 generates a second packaging control signal. Accordingly, the control unit 5 sends an instruction to the packaging drive 26 of the packaging device 2 to stop the packaging device 2 from conveying the string 9. Additionally, the control unit 5 can send a winding feedback signal or another winding control signal to the winding device 3 to stop winding the string 9 on the reel 4.

[0154] Figure 3 The assembly 1 is shown in a situation where the string 9 is not connected to the reel 4. The dancer roller 36 is urged into the first position by its bias. Accordingly, the first sensor 31 detects the presence of the dancer roller 36 in said first position and sends a winding state signal indicating such detection to the control unit 5.

[0155] The second sensor 32 detects no loop of string 9 at the location of the second sensor 32. Therefore, the second sensor 32 sends a winding state signal to the control unit 5 indicating that no string 9 is present at the location of the second sensor 32.

[0156] Accordingly, the control unit 5 detects a first winding state indicating an error in the conveying string between the packaging device 2 and the winding device 3. The control unit 5 then generates a first packaging control signal. Accordingly, the control unit 5 sends an instruction to the packaging device 2 to stop the conveying string of the packaging drive 26. The control unit 5 can further be arranged to send an instruction to the winding device 3 to stop the rotation of the winding drive 6.

[0157] Figure 4 The assembly 1 is shown in a situation where the packaging process is interrupted at the packaging device 2. In particular, the conveyance of the string 9 through the packaging device 2 has been stopped. Therefore, no string 9 of any length is output at the packaging output 21.

[0158] The winding device 3 still winds the string 9 onto the reel 4. As a result, the string 9 is gradually tensioned between the packaging output 21 and the winding device 3. This tension is partially compensated by the displacement of the dancer roller 36 towards its second position.

[0159] The packaging device 2 sends a first packaging state signal indicating an error or failure in the packaging device 2 to the control unit 5. Accordingly, the control unit 5 detects the first packaging state and generates an instruction to stop the winding device 3 from winding the string 9 on the reel 4.

[0160] In an alternative configuration of the control unit 5, Figure 4 An operating state of the assembly 1 can be depicted in which the string 9 is wound on the reel 4 at a winding speed greater than the output speed of the string 9 at the packaging output 21. In this configuration of the control unit 5, the string track S will include a loop at the second sensor 32 in normal operation, such as Figure 1 Depicted.

[0161] In an alternative configuration of the control unit 5, the control unit 5 will receive a winding state signal from the second sensor 32 indicating that there is no string 9 at the position of the loop in the string track S. The control unit 5 will receive a winding state from the first sensor 31 indicating that the dancer roller 36 is not in the first position. Accordingly, the control unit 5 will detect a second winding state indicating that the winding speed at the reel 4 is higher than the output speed of the string 9 at the packaging output 21. Therefore, the control unit 5 will generate a first winding feedback signal or another winding control signal, and will send an instruction to the winding drive 6 to reduce the winding speed.

[0162] like Figures 1 to 4As shown, the control unit 5 includes a computer readable medium 52. The computer readable medium 52 is non-transient or tangible, such as a physical data carrier, such as a hard drive, a USB drive, a RAM memory, etc. The computer readable medium 52 includes instructions for processing one or more winding state signals and / or one or more packaging state signals and in response, generating corresponding one or more winding control signals and / or one or more packaging control signals. The control unit further includes a processing unit 51 for executing the instructions.

[0163] The invention further relates to a computer readable medium having computer executable instructions adapted to cause the control unit 5 to perform the method steps as described above.

[0164] It should be understood that the above description is included to illustrate the operation of the preferred embodiment and is not meant to limit the scope of the invention. From the above discussion, many variations will be clear to those skilled in the art, which variations will still be covered by the scope of the invention.

[0165] List of Reference Numerals

[0166] 1 Components

[0167] 2 Packaging device

[0168] 21 Packing output

[0169] 22 Sealing Station

[0170] 23 Filling Station

[0171] 26 Packaging Driver

[0172] 3 Winding device

[0173] 30 Connecting components

[0174] 300 Drive shaft

[0175] 301 Cam

[0176] 302 Retention member

[0177] 31 First sensor or dancer roller sensor

[0178] 32 Second sensor or path sensor

[0179] 33 Third sensor or reel sensor

[0180] 34 First guide roller

[0181] 35 Second guide roller

[0182] 36 Dancer roller

[0183] 4 Scrolls

[0184] 40 Reel Hub

[0185] 400 Support surface

[0186] 401 Keyway

[0187] 41 Clamp

[0188] 42 Flange

[0189] 5 Control unit

[0190] 51 Processor

[0191] 52 Computer readable medium

[0192] 6 Winding drive

[0193] 9 skewers

[0194] A Central axis

[0195] B Fixture axis

[0196] S string trajectory.

Claims

1. An assembly (1) for manipulating a string (9) of continuous medication bags, wherein: The assembly (1) comprises: a packaging device (2) for packaging discrete medicaments in corresponding medicament bags in the string (9); a winding device (3) for receiving the string (9) from the packaging device (2) and winding the string (9) on a reel (4); and a control unit (5) operatively connected to the packaging device (2) and the winding device (3), wherein the control unit (5) is arranged to: - receiving one or more packaging status signals from the packaging device (2), and sending one or more winding control signals to the winding device (3) in response to the one or more packaging status signals; and / or - receiving one or more winding status signals from the winding device (3) and sending one or more packaging control signals to the packaging device (2) in response to the one or more winding status signals; and the control unit (5) is further arranged to: - determining a winding state based on the one or more winding state signals, the winding state indicating one or more of the following: - an error occurs in the transport of the string (9) between the packaging device (2) and the winding device (3); - the difference between the delivery speed of the string at the packaging delivery (21) of the packaging device (2) and the winding speed of the string (9) at the reel; and - Malfunction of the winding device (3).

2. The assembly (1) according to claim 1, wherein The control unit (5) is arranged to determine a winding state based on the one or more winding state signals, the winding state indicating: -The reel (4) is full.

3. The assembly (1) according to claim 2, wherein: The control unit (5) is programmed to generate a packaging control signal in response to the detected winding state, the packaging control signal including one or more of the following instructions: - stopping the packaging device (2) from conveying the string (9); - increasing the delivery speed of the string at the packaging output (21); and - reducing the delivery speed of the string (9) at the packaging output (21).

4. Assembly (1) according to claim 3, wherein: The control unit (5) is further programmed to generate a winding feedback signal in response to the detected winding status which is sent back to the winding device (3).

5. Assembly (1) according to claim 4, wherein The winding feedback signal includes one or more of the following instructions: - stopping the winding device (3) from winding the string (9); - increasing the winding speed of the string on the reel (4); - reducing the winding speed of the string (9) at the reel (6); and - Reversing the winding direction of the reel (4).

6. Assembly (1) according to any one of claims 2 to 5, wherein: The winding device (3) comprises one or more sensors (31, 32, 33) operatively connected to the control unit (5) for detecting the presence or absence of a string (9) of consecutive dosage bags.

7. Assembly (1) according to claim 6, wherein The winding device (3) includes a tension adjustment roller (36) which defines at least a part of the string trajectory (S) between the packaging output member (21) and the reel (4), wherein the tension adjustment roller (36) is capable of moving between a first position and a second position, wherein the tension adjustment roller (36) is biased toward the first position, wherein the tension adjustment roller (36) is arranged to shift toward the second position under the influence of a passing string (9), and wherein the one or more sensors (31, 32, 33) include a tension adjustment roller sensor (31) which is arranged to detect the presence of the tension adjustment roller (36) in at least one of the first position and the second position.

8. Assembly (1) according to claim 6 or 7, wherein: The one or more sensors (31, 32, 33) include a path sensor (32) arranged to detect the presence or absence of the string (9) along a desired string trajectory (S).

9. Assembly (1) according to claim 6 or 7, wherein: The one or more sensors (31, 32, 33) include a path sensor (32) arranged to detect the presence or absence of a loop of the string (9) outside a desired string trajectory (S).

10. Assembly (1) according to any one of claims 6 to 9, wherein: The one or more sensors (31, 32, 33) include a reel sensor (33) arranged to detect the amount of the string (9) of consecutive medicament bags wound on the reel (4).

11. Assembly (1) according to any one of claims 6 to 10, wherein: The winding device (3) further comprises a winding drive (6) for driving the winding shaft (4) to rotate and a torque sensor for measuring the torque of the winding drive (6).

12. Assembly (1) according to any one of the preceding claims, wherein The control unit (5) is arranged to determine, based on the one or more packaging status signals, a packaging status indicating one or more of the following: - the sealing unit (22) of the packaging device (2) is opened; - an error occurs in the transport of the string (9) between the packaging device (2) and the winding device (3); - the difference between the delivery speed of the string at the packaging delivery (21) of the packaging device (2) and the winding speed of the string (9) at the reel; - the reel (4) is filled; and - Malfunction of the packaging device (2).

13. Assembly (1) according to claim 12, wherein The control unit (5) is programmed to generate a winding control signal in response to the detected packaging state, the winding control signal including one or more of the following instructions: - stopping the winding device (3) from winding the string (9); - increasing the winding speed of the string on the reel; - reducing the winding speed of the string (9) at the reel (6); and - Reversing the winding direction of the reel (4).

14. Assembly (1) according to claim 13, wherein The control unit (5) is further programmed to generate a packaging feedback signal in response to the detected packaging status which is sent back to the packaging device (2).

15. Assembly (1) according to claim 14, wherein The packaging feedback signal includes one or more of the following instructions: - stopping the packaging device (2) from conveying the string (9); - increasing the delivery speed of the string at the packaging output (21); and - reducing the delivery speed of the string (9) at the packaging output (21).

16. Assembly (1) according to any one of the preceding claims, wherein The winding device (3) comprises a winding drive (6) for driving the reel (4) to rotate in a winding direction so as to wind the string (9) onto the reel (4).

17. Assembly (1) according to any one of the preceding claims, wherein The packaging device (2) comprises a packaging drive (26) for conveying the string (9) through the packaging device (2).

18. Assembly (1) according to any one of the preceding claims, wherein The control unit (5) includes: a non-transitory computer-readable medium (52), which includes instructions for processing the one or more winding status signals and / or the one or more packaging status signals and, in response, generating corresponding one or more winding control signals and / or one or more packaging control signals; and a processing unit (51), which is used to execute the instructions.

19. A method for manipulating a string (9) of consecutive medicament bags using an assembly (1) according to any one of the preceding claims, wherein: The method comprises the following steps: - receiving one or more packaging status signals from the packaging device (2), and sending one or more winding control signals to the winding device (3) in response to the one or more packaging status signals; and / or - receiving one or more winding status signals from the winding device (3), and sending one or more packaging control signals to the packaging device (2) in response to the one or more winding status signals; and the method further comprises the following steps: - determining a winding state based on the one or more winding state signals, the winding state indicating one or more of the following: - an error occurs in the transport of the string (9) between the packaging device (2) and the winding device (3); - the difference between the delivery speed of the string at the packaging delivery (21) of the packaging device (2) and the winding speed of the string (9) at the reel; and - Malfunction of the winding device (3).

20. The method according to claim 19, wherein: The method further comprises the step of determining a winding state based on the one or more winding state signals, the winding state indicating: -The reel (4) is full.

21. The method according to claim 20, wherein: The method further comprises the step of generating a packaging control signal in response to the detected winding state, the packaging control signal comprising one or more of the following instructions: - stopping the packaging device (2) from conveying the string (9); - increasing the delivery speed of the string at the packaging output (21); and - reducing the delivery speed of the string (9) at the packaging output (21).

22. The method according to claim 21, wherein: The method includes stopping the packaging device (2) from conveying the string (9) in response to an indication of an erroneous winding state of the string conveyed between the packaging output (21) and the reel (4).

23. The method according to claim 21 or 22, wherein: The method comprises increasing the output speed of the string (9) at a packaging output (21) of the packaging device (2) in response to a winding state indicating that the winding speed at the reel (4) is higher than the output speed of the string (9).

24. The method of claim 21, 22 or 23, wherein: The method comprises reducing the output speed of the string (9) at a packaging output (21) of the packaging device (2) in response to a winding state indicating that the winding speed at the reel (4) is lower than the output speed of the string (9).

25. The method according to any one of claims 21 to 24, wherein: The method includes stopping the packaging device (2) from conveying the string (9) in response to the reel (4) being full.

26. The method according to any one of claims 21 to 25, wherein: The method further comprises the step of generating a winding feedback signal in response to the detected winding state and sending the winding feedback signal to the winding device (3).

27. The method according to claim 26, wherein: The winding feedback signal includes one or more of the following instructions: - stopping the winding device (3) from winding the string (9); - increasing the winding speed of the string on the reel (4); - reducing the winding speed of the string (9) at the reel (6); and - Reversing the winding direction of the reel (4).

28. The method according to claim 27, wherein: The method comprises reducing the winding speed at the reel (4) in response to a winding state indicating that the winding speed at the reel (4) is higher than the output speed of the string (9) at a packaging output (21) of the packaging device (2).

29. The method according to claim 27 or 28, wherein: The method comprises increasing the winding speed at the reel (4) in response to a winding state indicating that the winding speed at the reel (4) is lower than the output speed of the string (9) at the packaging output (21) of the packaging device (2).

30. The method of claim 27, 28 or 29, wherein: The method comprises, in response to a malfunction of the winding device (3), rotating the winding shaft (4) in a direction opposite to the winding direction for a predetermined time interval.

31. The method according to any one of claims 19 to 30, wherein: The method comprises the step of determining a packaging status based on the one or more packaging status signals, the packaging status indicating one or more of the following: - the sealing unit (22) of the packaging device (2) is opened; - an error occurs in the transport of the string (9) between the packaging device (2) and the winding device (3); - the difference between the delivery speed of the string at the packaging delivery (21) of the packaging device (2) and the winding speed of the string (9) at the reel; - the reel (4) is filled; and - Malfunction of the packaging device (2).

32. The method according to claim 31, wherein: The method further includes generating a winding control signal in response to the detected packaging state, the winding control signal including one or more of the following instructions: - stopping the winding device (3) from winding the string (9); - increasing the winding speed of the string on the reel; - reducing the winding speed of the string (9) at the reel (6); and - Reversing the winding direction of the reel (4).

33. The method of claim 32, wherein: The method comprises stopping the winding device (3) from winding the string (9) onto the reel (4) in response to a malfunction of the packaging device (2).

34. The method according to claim 32 or 33, wherein: The method further comprises the step of generating a packaging feedback signal in response to the detected packaging status and sending the packaging feedback signal back to the packaging device (2).

35. The method of claim 34, wherein: The packaging feedback signal includes one or more of the following instructions: - stopping the packaging device (2) from conveying the string (9); - increasing the delivery speed of the string at the packaging output (21); and - reducing the delivery speed of the string (9) at the packaging output (21).

36. A computer program product comprising a non-transitory computer readable medium (52) holding instructions which, when executed by a processor (51), cause an assembly according to any one of claims 1 to 18 to perform the steps of a method according to any one of claims 19 to 35.

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