Patent Application
20210245216
From CN 104551538 B a device and a method for separating flexibly rolled strip material are known. The strip material is fed from a coiler to a strip accumulator via a first clamping roller and a strip straightening arrangement. Behind the strip accumulator there are two further clamping rollers with integrated length measurement, between them a strip thickness measurement, and behind them a hydraulic shear for separating the strip material. The first clamping roller determines the strip length fed to the strip accumulator and the clamping roller arranged behind the strip accumulator determines the strip length fed out of the strip accumulator. By integrating the difference between the fed-in strip length and the fed-out strip length over time, the strip length stored in the strip accumulator can be determined. If the stored strip length in the strip accumulator exceeds a nominal value, strip material is fed via the clamping roller arranged behind the strip accumulator and the subsequent thickness measuring unit, and an actual thickness profile of the strip material is determined. Based on the actual thickness profile, a cutting plan is determined according to which the fed length of the strip material is controlled and the cutting process is carried out. The strip length fed to the hydraulic shear is determined by averaging the values determined by the clamping rollers arranged immediately before and behind the thickness measurement.
From EP 3 181 248 A1 a process and an apparatus for producing a sheet metal blank are known. The method includes the steps: flexible rolling of a strip material, wherein a thickness profile with different sheet thicknesses is produced over the length of the strip material; determining a measuring thickness profile of several regions of the strip material lying one behind the other; calculating a desired position in the strip material for a sheet blank to be cut from the strip material as a function of the generated measuring thickness profile of at least two regions of the strip material lying one behind the other; cutting the flexibly rolled strip material by at least one cutting device along the desired position for producing the sheet blank.
The production of shaped cuts and rectangular blanks, also known as Tailor Rolled Shapes or Tailor Rolled Blanks, can be carried out using a suitable separating device. For this purpose, the strip feeding device arranged in front of the cutting device is equipped with a decoiler, a straightening machine, a strip buffering unit and a feeding device. The threading of a metal strip into such an apparatus is done manually by the operator. The operator threads the beginning of the strip up to a marked position in the cutting tool or on the cross-cutting shear. The automatic mode is then started and the feed system feeds the strip forward by a predetermined length per working stroke, which is always the same. With this procedure, the cyclic thickness profile of the flexibly rolled strips can only be positioned inaccurately or not at all to the separating edge of the cutting device. This means that position tolerances for the thickness profile relative to the position within the contour cut or the rectangular blank cannot be fulfilled. In addition, areas of the metal strip that do not comply with the thickness tolerances cannot be detected and sorted out. Furthermore, it is not possible to position cyclically recurring thickness profiles in the flexibly rolled strips automatically and precisely on the cutting edges of the cutting devices.
Disclosed herein is an apparatus and a method for separating flexibly rolled strip material. Flexibly rolled strip material has a variable thickness profile in the longitudinal direction of the strip. The separation of flexibly rolled strip material therefore requires exact positioning of the separation region in order to obtain blanks with a defined nominal thickness profile. Disclosed herein is a apparatus for separating flexibly rolled strip material, which enables precise measurement and evaluation of sheet thickness profiles and ensures precise positioning of the strip material for separation. Further disclosed is an appropriate process for separating flexibly rolled strip material that will allow accurate measurement, evaluation and positioning.
An apparatus for separating flexibly rolled strip material is disclosed, comprising: a buffer device for temporarily buffering the flexibly rolled strip material; a first feed device arranged behind the buffer device in the feed direction of the strip material; at least one length measuring device for continuously measuring a length of the strip material; a thickness measuring device for continuously measuring a thickness of the strip material along the length; a second feed device arranged behind the first feed device; a separating device arranged behind the second feed device in the feed direction of the strip material; wherein the first feed device and the second feed device are arranged to move the strip material from the buffer device to the separating device depending on the thickness measurement and the length measurement; wherein the thickness measurement device is arranged in the feed direction of the strip material behind the buffer device and in front of the first strip feed device; and the at least one length measurement device is arranged in the feed direction of the strip material behind the first strip feed device.
The apparatus has the advantage that the feed applied by the first feed device can be controlled on the basis of the values previously determined by the thickness measuring device. A recurring thickness profile of the flexibly rolled strip can be precisely detected, compared with the desired target profile and positioned exactly in the separation position of the separating device. In addition, areas of the metal strip that do not comply with the thickness tolerances can be identified and sorted out.
According to an embodiment, the apparatus can have a coiler for uncoiling the flexibly rolled strip material and at least one straightening unit for straightening the flexibly rolled strip material. Several straightening units can be used in particular for processing particularly thick strips and/or for strips with large absolute thickness increments of, for example, more than 1 mm. The coiler and the at least one straightening unit, which together can also be referred to as the uncoiling and straightening group, are connected upstream of the strip buffer device. Preferably, the first and second feed devices for the separating device are independently controlled from of the feed of the uncoiling and straightening group. The uncoiling and straightening group conveys the strip into the strip accumulator and makes the flexibly rolled strips available for processing by the further apparatus. The conveying respectively uncoiling speed of the uncoiling and straightening group can be controlled by a filling level sensor of the strip accumulator. For example, the filling level sensor can be an ultrasonic unit that senses the depth of the strip loop hanging in the strip accumulator and transmits a corresponding signal to the controller for the uncoiling and straightening group. It is to be understood that other sensors can also be used, such as an optical sensor, a capacitive sensor and/or an inductive sensor. The straightening unit can be supported by an infeed driver and a take-off roller. The operation or running of the coiler, inlet driver, straightening unit and take-off roller can be synchronized with each other via controllers and can be operated in speed control or torque control to each other. Each of the units can be operated individually, i.e. independently of the others, as a generator or motor. The embodiment with decoiler and straightening group is suitable when the strip material is rewound into a coil after flexible rolling and further processed elsewhere. In principle, however, it is also possible that the strip accumulator, feed and separation unit directly follow a flexible rolling in the continuous process.
The strip accumulator serves to decouple the uncoiling and straightening group of the apparatus from the position-controlled part of the apparatus which operates on the basis of feed lengths, with the components thickness measurement, feeds, length measurement and separating device. In particular, it is provided that the length-based feed control of the separating unit is based only on the length measurement values of the length measuring device located behind the strip accumulator. Any measured length values measured before the buffer device can be ignored by the feed control in this case.
The thickness measuring unit is arranged in feed direction behind the strip buffer and in front of the first feed device. The corresponding first length measuring unit is located directly behind the first feed device. The first length measuring unit is designed to continuously measure the length of the strip material. Thickness measurement is also carried out continuously during the strip feed. Preferably the length measuring device and the thickness measuring device are coupled with each other in a measurement technical manner. It is provided in particular that the length measuring unit generates trigger signals and transmits them to the thickness measuring unit in order to trigger thickness measurements, which are then recorded.
According to an embodiment, the length measuring unit may include a measuring wheel which is in contact with the first side of the strip material, and a support wheel which is in contact with an opposite side of the strip material as a counter bearing for the measuring wheel. The running surface of the measuring wheel can, for example, be made of a steel material. The running surface of the support wheel can, for example, be made of an elastic material. It is to be understood that the design of the length measuring unit described above can also be used for any other length measuring unit in the apparatus.
According to a preferred embodiment, two length measuring devices are provided, a first length measuring device which is assigned to the first feed device, and a second length measuring device which is assigned to the second feed device. The second length measuring device is arranged in the feed direction of the strip material after the second feed device and before the separating device. For a high measuring accuracy it is advantageous if the measuring devices are arranged as close as possible to the respective feeds. Preferably the first length measuring device has a first distance to the first feed device which is smaller than 0.5 times, in particular smaller than 0.25 times, the distance between the first feed device and the second feed device. The second length measuring device may have a second distance from the second feed device which is smaller than 0.5 times, in particular smaller than 0.25 times, the distance between the second feed device and the separating device.
The two feed devices work synchronously to feed the strip material from the strip accumulator to the separating unit. Both feeds exert a tensile force to the strip material to move it. To ensure that the strip material is kept flat between the two feed devices, the second feed device, which is located downstream in the feed direction, may be driven in particular faster than the upstream first feed device. In this way, the strip material between the two feed devices is held slightly in tension and is thus flat, which has a positive effect on the measured value accuracy.
According to a preferred embodiment, the distance between the thickness measuring device and the separating device is at least twice the blank length of a blank to be cut from the strip material. In particular, the distance is at least twice the length of a blank plus the feed path covered by the strip material during the computing time for a blank to be cut.
The separating device can be selected according to the requirements of the flat product to be separated and can comprise, for example, a cross-cutting shear or a beam cutting unit, in particular a laser cutting unit. For simply cutting to length of blanks, a cross-cutting shear, a cross-cutting laser or a comparable beam system for cross-cutting can be used in conjunction with the strip feed system. For producing shaped cuts, a press line with suitable cutting tools or a beam cutting unit, in particular a laser beam unit, can be used which in each case are connected to the strip feed apparatus.
A solution to the above object further is a process for separating flexibly rolled strip material, in particular by an apparatus according to any one of the above embodiments, comprising the steps: buffer storing the flexibly rolled strip material by a buffer device; feeding the strip material from the buffer storage by a first feed device and a second feed device; continuously measuring a thickness of the strip material by a thickness measuring device while the strip material is being advanced, with the thickness being measured in the feed direction of the strip material upstream of the first feed device; continuously measuring a length of the strip material by a length measuring device while the strip material is being advanced, with the length being measured in the feed direction of the strip material downstream of the first feed device; calculating an actual thickness profile for a blank to be separated from the strip material from measured thickness values and associated measured length values; comparing the calculated actual thickness profile with a predetermined nominal thickness profile and calculating a feed length for the blank to be separated from the strip material; feeding the strip material to a separating device by the first feed device and the second feed device on the basis of the calculated feed length.
The length measurement behind the respective feed unit decouples the feed movement from the length measurement, which leads to particularly accurate measurement results. The thickness measurement before the first feed unit also has a positive effect on the measuring accuracy, since the feed applied by the first feed unit can be controlled by means of the values previously determined by the thickness measuring unit. The use of the second position-controlled feed device with associated length measuring unit contributes to a flat, warp-free and loop-free strip run between the thickness measuring unit and the cutting point, which in turn ensures precise positioning of the reference edges of the feed lengths in relation to the cutting point. The advantages for the process as a whole are the same as for the apparatus. A recurring thickness profile of the flexibly rolled strip can be precisely detected, compared with the desired target profile and positioned exactly relative to the separation point of the separating device. In addition, areas of the metal strip that do not comply with the thickness tolerances can be identified and sorted out. It is understood that all procedural features can be applied analogously to the apparatus and vice versa, all apparatus-related features can be applied to the process.
According to a method embodiment, the strip material is pulled out of the strip buffer storage by the position-controlled first and/or second strip feed. The flexible rolled strip is continuously measured with respect to thickness by the thickness measuring unit. On the basis of the measured thickness and taking into account the corresponding measured length values, the thickness measuring unit evaluates whether the flexible rolled strip corresponds to the required thickness tolerances or not. The comparison of the determined actual thickness profile with the predefined target thickness profile is carried out in particular taking into account the associated tolerances of the target thickness profile, which can be represented by an envelope curve. Thereby, it is examined whether the determined actual profile lies within the envelope of the target profile. From the result of the comparison, the feed length for the strip respectively the blank to be cut therefrom, and the cutting position of the blank in the strip can be calculated. The strip is divided into areas that are OK (so-called OK parts) and areas that are not OK (so-called not OK parts). The position and length of these individual regions in the strip is transferred from the thickness measuring device to the first feed device. The first feed device, and also the second feed device coupled to it, can then carry out the feeds instructed by the thickness measuring unit and position the reference edges of the individual feed lengths precisely at the cutting point of the cutting device. The feed unit can pass on the information to the other system components as to whether the feed length is a length with OK thickness profile or not OK thickness profile.
The length measuring device is designed to continuously measure a length value representing the feed path of the strip. Preferably, high-precision length measuring devices are used which have a measuring tolerance of up to 0.5 mm per metre strip length, in particular of up to 0.1 mm per metre strip length. The length can be measured, for example, by means of a measuring wheel which is in contact with the passing strip material. The length measuring device can measure the strip material from beginning to end without interruption. The starting point of the measurement can be the beginning of the strip, which defines the zero position of the length accordingly. From the starting point of the length measurement, the length is continuously measured.
According to a preferred method embodiment, the first length measuring device of the first feed is referenced at the starting point with the thickness measurement with regard to the length. This can be done by continuously transmitting the measured length value from the first length measuring device to the thickness measuring device. The length measured values can be indicated either absolutely or incrementally. The thickness measurement scales the thickness measurement values based on the indicated length measurement values along the strip length. In this way, both measuring instruments can work from exactly the same strip length zero point. The measured actual thickness profile can be reliably compared with the specified nominal thickness profile and a corresponding evaluation can be made with regard to the parts that are OK and those that are not. The referencing of the length measuring device with the thickness measuring device is also important for the position-accurate positioning of the feed lengths by the feed device in relation to a reference cutting position for separating. Alternatively or in addition, the second length measuring device of the second feed can be referenced at the starting point with the thickness measurement with regard to the length.
According to an embodiment, a further length measurement of the strip material can be carried out by a second length measuring device during the feeding of the strip material to the separating device, wherein the length measuring by the second measuring device is carried out in the feed direction of the strip material behind the second feed device. It may also be provided as a further process step: comparing the first measured length values determined by the first length measuring device with the associated second measured length values determined by the second length measuring device; and switching off the apparatus if a difference between the first measured length values and the second measured length values exceeds a predetermined difference value. This embodiment provides a measurement redundancy so that the risk of outage parts is reduced.
According to a method embodiment, a fixed distance can be set between the thickness measuring device and the first feed device. This distance is measured precisely, preferably with an accuracy of up to +/−0.2 mm (millimeters), and maintained during operation of the apparatus. In this way, the length reference between the thickness measurement on the one hand and the feed respectively length measurement on the other hand can be reliably guaranteed over the entire length of the strip material.
For the precise positioning of a reference edge of a feed length to a reference separating position of the separating device, a fixed distance can be set between the thickness measuring device and the separating device according to a possible embodiment. This distance is measured precisely, preferably with an accuracy of up to +/−0.2 mm, and is maintained during operation of the apparatus.
According to a further method embodiment, the measuring distance between the thickness measurement and the separating device can be set to at least twice the blank length of a blank to be cut out of the strip material. In particular, the distance between the thickness measurement and the separating device can be set to at least twice the length of a blank plus the feed path covered by the strip during the computing time for a blank to be cut.
As far as reference is made in this disclosure to a distance between two devices, this may refer to a given reference point of the respective device, e.g. a measuring plane at the measuring devices, or a separation point at the separating device.
According to a preferred method embodiment, the second feed device is operated synchronously with the first feed device, in particular with the same length scale as the first feed device and the thickness measuring unit. By controlling in a manner that the second feed unit advances slightly relative to the first feed unit, the second feed unit generates a light strip tension in the strip section located within the measuring path, which ensures a flat strip run.
Embodiments are explained below using the drawing figures. Herein:
A coil 4 of flexible rolled strip material is shown as starting material. The apparatus 2 comprises a coiler 5 for uncoiling the flexibly rolled strip material 3 and a straightening unit 6 for straightening the flexibly rolled strip material. The straightening unit 6 comprises a plurality of rolls, in particular between 7 and 23 rolls, which the strip material passes through. Between the coiler 5 and the straightening unit 6 an infeed driver 7 can be provided, which pulls the strip material 3 from the coiler and feeds it to the straightening unit. A take-off roller 8 can be arranged behind the straightening unit 6 in the feed direction of the strip, which transmits a feed force to the strip material 3. The operation of the apparatus components coiler, infeed driver, straightening unit and take-off roller can be synchronized with each other via controllers and operated in speed control or torque control to each other. Each of the units can be operated individually, i.e. independently of the others, as a generator or motor.
In the strip feed direction behind the uncoiling and straightening group 10, a buffer device 9 is provided, which is designed to temporarily store a respective section of the strip 3. A feed movement of the uncoiling and straightening group 10 is decoupled from a feed movement of the separating group 12. The uncoiling and straightening group 10 conveys the strip 3 into the strip buffer storage 9, which makes the flexibly rolled strip 3 available for further processing in the separating group 12. The conveying respectively uncoiling speed of the uncoiling and straightening group 10 can be controlled by a level sensor 13 of the strip buffer storage 9. The level sensor 13 can, for example, include an ultrasonic sensor or an optical sensor which senses the depth of the strip loop hanging in the strip accumulator and transmits a corresponding signal to the controller for the uncoiling and straightening group 10.
The apparatus 2 comprises as further components behind the buffer device 9 a thickness measuring device 14 for continuous measurement of the thickness of the strip material, a first feed device 15, a first length measuring device 16 associated with the first feed device for continuous measurement of the length of the strip material 3, a second feed device 17 which is arranged at a distance behind the first feed device 15, a second length measuring device 18 associated with the second feed device 17 and a separating unit 19 for separating the strip material 3.
The two feed devices 15, 17 are operated synchronously and are designed to move the strip material 3 from the buffer device 9 to the separating device 19 depending on the thickness measurement and the length measurement. The two feeds 15, 17 each exert a feed force on the strip material in order to move it. In order to keep the strip material flat between the two feed devices 15, 17, the second feed device 17 can be driven with a slight advance compared to the first feed device 15. A special feature of the present arrangement is that the thickness measuring device 14 is arranged in the feed direction R of the strip material 3 behind the buffer device 9 and before the first feed device 15, and that the first length measuring device 16 is separate from the first feed device 15 and is arranged downstream thereof. For the length-based feed control of the separating group 12, only the length measuring values of the length measuring devices 16, 18 located behind the strip buffer 9 are used as a basis.
The first length measuring device 16 and the thickness measuring device 14 are coupled with each other with respect to measurement technique. A fixed distance A1 is set between the thickness measuring device 14 and the first feed device 15 in order to reliably maintain the length reference over the strip length between the thickness measurement device 14 on the one hand and the first feed device 15, respectively the first length measurement device 16, on the other hand. This distance A1 is measured precisely, preferably with an accuracy of up to +/−0.2 mm, and maintained during operation of the apparatus. In this way, the length reference between the thickness measurement on the one hand and the feed respectively length measurement on the other hand can be reliably guaranteed over the entire length of the strip material. During operation of apparatus 2, the length measuring unit 16 can generate trigger signals B1 and transmit them to the thickness measuring unit 14. Each trigger signal B1 serves as a trigger for a thickness measurement, so that with each trigger signal of the length measuring unit 16 a thickness measurement value is generated and assigned to a corresponding length measurement value. In this way, data records are generated from pairs of length and thickness values, from which the actual thickness profile of the blank to be cut from strip material 3 can be determined.
The first and second length measuring units 16, 18 each comprise a measuring wheel 20, 20′, which is in contact with a first side of the strip material 3, as well as a support wheel 21, 21′, which serves as a counter bearing for the measuring wheel 20, 20′. The running surface of the measuring wheels can, for example, be made of a steel material. The running surface of the support wheels, for example, can be made of an elastic material. It is to be understood, however, that other forms of length measurement, such as non-contact sensors, can also be used. For a high measuring accuracy of the measured length values, it is advantageous if the measuring devices 16, 18 are arranged as close as possible to the respective feeds 15, 17. In particular, the distance between the first length measuring device 16 and the first feed device 15 may be less than 0.1 times the distance between the two feed devices 15, 17. The distance between the second length measuring device 18 and the second feed device 17 may be less than 0.1 times the distance between the second feed device 17 and the separating device 19.
The separating device 19 can be selected according to the requirements of the flat product 22 to be separated and can, for example, comprise a mechanical separating device, such as a cross-cutting shear (as shown here), or a beam cutting unit, in particular a laser cutting unit. In general, the separating device can also be described as a cutting or parting device. The present cutting device 19 is designed to produce cuts perpendicular to the strip edge. It is to be understood, however, that the separating device can also be adapted to the final contour of the blank to be produced with regard to the separating cut to be performed. For example, the cutting device can also be designed to produce cuts that run diagonally to the strip edge, or curved cuts. In this way, as the case may be, the amount of scrap may be reduced.
Hereinafter, a method for separating flexible rolled strip material 3 into blanks 22 is described with reference to
Step S30 provides for temporarily buffering the flexible rolled strip material 3 by the buffer device 9. In particular, it is provided that the strip material 3 is continuously fed from the uncoiling and straightening group 10 into the strip buffer device 9. In step S40, the strip material 3 is fed out of the temporary buffer store 3 by the first and second feed devices 16, 17. This is done in particular at intervals according to a calculated feed length for the blank 22 to be cut out of the strip material 3 in each case. To determine the feed length, a continuous measurement of a thickness signal and a length signal of the strip material 3 is carried out in steps S50, S60. This is carried out continuously by the thickness measuring device 14 and the first length measuring device 16, i.e. while the strip material 3 is moved by a feed length by the feed devices 15, 17. The thickness measurement (S50) is carried out in the feed direction R of the strip material 3 before the first feed device 15 and/or before the first length measuring device 16.
The thickness and length values measured by the measuring devices 14, 16 are transmitted to a calculation or control unit, respectively, where they are further processed to calculate the actual thickness profile of a blank 22 to be cut and to calculate the feed length for this blank. To determine the thickness profile of the strip, respectively the blanks to be cut therefrom, a thickness value D is assigned to each length position L of strip material 3. Since the thickness measuring device 14 is arranged before the first feed device 15, the thickness values measured by same and the actual thickness profiles determined therefrom together with the corresponding length values can be taken into account directly in the current feed movement. The length measurement can be carried out in the feed direction R of the strip immediately behind the first feed device 15.
The continuous measurement of the length, respectively path signal of the strip material 3 by the first length measuring device 16 takes place simultaneously with the thickness measurement while the strip material is being advanced. In particular, it is provided that the first length measuring device 16 be referenced at the starting point with the thickness measuring device 14 with regard to length. This is done for the first time, as described above, by setting the defined distance dimension A1, as well as during the process by continuously communicating the measured length value from the first length measuring device 16 to the thickness measuring device 14. The communicating of the measured length values can be absolute or incremental, for example by trigger signals B1, B2. The thickness measurement scales the thickness measurement values using the communicated length measurement values over the strip length. In this way, both measuring devices 14, 16 work from exactly the same strip length zero point. In step S70, the actual thickness profile for the blank 22 to be separated from the strip material 3 is calculated from the measured thickness and length values of the measuring devices 14, 16. The measured actual thickness profile can be reliably compared with the specified nominal thickness profile and the associated tolerances, in particular represented by an envelope curve, in step S80 and a corresponding evaluation can be made with regard to the parts that are OK and those that are not. In step S90, the feed length for the blank 22 to be separated from the strip material 3 can be calculated at the same time or time-shifted.
In the subsequent step S100 the strip material 3 is fed to the separating device 19 by the two feed devices 15, 17 on the basis of the calculated feed length VL. While the strip material is fed forward by the calculated feed length VL for a first blank, the thickness and length measurement for the next blank 22′ to be cut out is carried out simultaneously by the thickness and length measuring devices 14, 16 in the region of the first feed unit 15. This is shown by the dashed line in
According to a further step S120 a further length measurement can be carried out by a second length measuring device 18 during the feed of the strip material 3 from the second feed device 17 to the separating unit 19. The second length measuring unit is arranged in the feed direction of the strip material 3 preferably directly behind the second feed device 17. It may also be provided as a further method step S130: comparing the first length measured values determined by the first length measuring device 16 with the associated second length measured values determined by the second length measuring device 18, and switching off the apparatus if a difference between the first and second length measured values exceeds a predetermined difference value. This measurement redundancy minimizes the risk of producing rejects.
The only difference in the present embodiment is the design of the separating device 19, which in this case comprises a form-cutting tool, in particular with a strip separating tool. The form-cutting tool is designed to cut a form cut blank 22 corresponding to the target contour out of the strip material 3. Depending on the component to be manufactured, one or more form cut blanks 22 can be cut out of strip material 3 in one operation of the form cutting tool. The separating device 19 can be designed as a punching tool, as shown in greater detail in
The feed units 15, 17 are control connected to the form cutting tool 19 in such a way that the strip material is fed in the desired length up to a reference point 32, respectively a reference plane at the form cutting tool 19. In particular, it is provided that the form cutting tool 19 be aligned exactly with respect to the press table 31 and be positioned and/or fixed exactly by means of positioning means, such as fitting pins or fitting cones for example.
With the apparatus and, respectively, process described above, it is possible to uncoil coils 4 of flexibly rolled strip material 3, straighten them, examine the provided sheet thickness profiles for conformity with the sheet thickness tolerance and carry out an OK/not OK evaluation. By this, the strip 3 is divided into feed lengths, which are positioned exactly under the separating edge of the separating device 19. The cutting device 19 then cuts the feed lengths from the strip. In the case that the feed length is “OK” (i.O.), the rectangular or form cut blank is fed for further processing. If it is a feed length that is “not OK” (n.i.O.”), it is sorted out and scrapped.
| Number | Date | Country | Kind |
|---|---|---|---|
| 18171364.5 | May 2018 | EP | regional |
This application is a national stage of, and claims priority to, Patent Cooperation Treaty Application No. PCT/EP2019/061408, filed on May 3, 2019, which application claims priority to European Application No. EP18171364.5, filed on May 8, 2018, which applications are hereby incorporated herein by reference in their entireties.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2019/061408 | 5/3/2019 | WO | 00 |
