Apparatus and method for non-contact processing of ribbon-like articles, preferably for the production of electrochemical cells - Patents.com

Abstract

The apparatus (100) for contactless processing of ribbon-like articles (N) comprises a conveying device (1) for conveying ribbon-like articles, the conveying device (1) comprising an inlet section (11), an outlet section (12) and a connection section (13), and at least two operating units (2) configured for contactless processing of the ribbon-like articles (N). The operating units (2) are movable along a loop path (3). The apparatus (100) further comprises a variation device (4) for varying the speed of movement of the operating units (2). The variation device (4) is configured to vary the speed of each of the operating units (2) individually depending on the position along the loop path (3).

Description

[Technical field]

[0001] The present invention relates to an apparatus for contactless processing of ribbon-like articles, preferably for the production of electrochemical cells.

[0002] The present invention also relates to a method for performing non-contact processing on a ribbon-like article.

[0003] The invention finds preferred, but not exclusive application in the technical field of electrochemical cell production and, more generally, in the technical field of manufacturing products formed from ribbon-like articles. [Background technology]

[0004] In particular, it is known in the relevant art to use ribbons formed from conductive materials that are wound to form the anode and / or cathode of an electrochemical cell.

[0005] In known manufacturing processes, such ribbons are patterned at their edges, then cut and wound to form a sandwich of a pair of conductive materials separated by an insulating layer to form the anode and cathode of an electrochemical cell.

[0006] Such processing can be accomplished by a laser head that acts on that portion of the ribbon to form the desired pattern.

[0007] In a known embodiment, the ribbon slides relative to a stationary laser head which directs a light beam onto the moving ribbon to achieve the required processing.

[0008] In this disclosure and the appended claims, certain terms and phrases, unless expressly stated otherwise, are intended to have the meanings set forth in the following definitions.

[0009] The term "ribbon-like article" means any solid product that is presented in an industrial production line in the form of an elongated strip, i.e. in the form of an element whose longitudinal extension is significantly greater than its lateral extension.

[0010] The ribbon-like article also has properties that allow for some bending while being fed along the relative production line.

[0011] The ribbon-like article can be made, for example, from a conductive material that can be used to form a sandwich structure with other layers, possibly after cutting, to create an electrochemical cell.

[0012] The term "loop path" means a path traveled by a ribbon-like article or other element between a starting point and an end point. A loop path is "closed" if the starting point and the end point are coincident, and is "open" if the starting point and the end point are close to each other but not coincident.

[0013] The term "non-contact processing" refers to any type of processing that is performed without contact between the ribbon-like article and the operational unit that performs the processing. Such processing can be performed by providing energy to the ribbon-like article, for example, via a light beam or ultrasound. Examples of non-contact processing include patterning and etching processes.

[0014] The term "continuous" is an expression of motion and refers to an uninterrupted operation without any halt or interruption in the motion of the object. In particular, with respect to the processing of ribbon-like articles, the term "continuous" refers to a process in which the processing of ribbon-like articles is performed continuously and without interruption.

[0015] Also, it should be noted that the phrase "moving an object between a first location and a second location" refers both to movement from the first location to the second location, and movement from the second location to the first location.

[0016] Such a definition applies equally to similar expressions of motion, such as the transfer or movement of a general object between two locations, between two areas, or between two different motion configurations. Summary of the Invention [Problem to be solved by the invention]

[0017] The applicant has preliminarily observed that, in the context of the constant need to improve the performance and efficiency of manufacturing processes, in a non-contact processing line for ribbon-like articles, the feed rate of the ribbon-like articles to the operational units performing said processing can be a significant factor limiting the production capacity of the line itself.

[0018] Such limitations are even more important when the process requires the realization of relatively small details in the elongated article being processed, such as in the realization of a pattern.In particular, the applicant has observed that the ribbon-like article needs to be fed to the motion unit at a sufficiently reduced speed to ensure correct execution of the required process.

[0019] Such a requirement implies a global slowdown in the production line unless the ribbon-like article needs to be slowed down in the operating units.

[0020] However, the applicant has noted that such a solution creates a tension condition in the ribbon-like article, which may impair the manufacturing quality of the final product obtained through the treated ribbon-like article.

[0021] The applicant has therefore realised that in order to increase the speed at which non-contact processing can be performed on a ribbon-like article, this can be achieved by activating an operating unit in addition to the ribbon-like article.

[0022] Applicant has also noted that by using two or more action units, one of the action units can be performing a process while the other is performing a reset action.

[0023] Therefore, the applicant has further recognised that the feeding speed of the ribbon-like article can be increased compared to known solutions when the speed at which the operating unit moves is not maintained constant along the loop path that the operating unit follows to perform non-contact processing on the article.

[0024] The applicant has also finally discovered that by varying the movement speed of each of the operating units performing non-contact processing depending on their position along the loop path, the optimal speed of the operating units can be selected as required to perform processing operations requiring high precision.

[0025] These characteristics allow the ribbon-like article to be fed to the operational units at a sufficiently slow relative speed so that the required processing can be carried out without stopping or slowing down the ribbon-like article when at a particular location along the path. [Means for solving the problem]

[0026] Thus, in a first aspect thereof, the present invention relates to an apparatus for contactless processing of ribbon-like articles, preferably for the production of electrochemical cells.

[0027] Preferably, the apparatus comprises a conveying device for conveying ribbon-like articles, the conveying device including an inlet portion, an outlet portion and a connection extending between the inlet portion and the outlet portion.

[0028] Preferably, the apparatus comprises at least two operating units configured to perform a contactless treatment on the ribbon-like article, the operating units being preferably movable along a loop path, preferably comprising a treatment section facing a connection section along which the operating units can perform a contactless treatment on the ribbon-like article.

[0029] Preferably, the apparatus comprises a variation device for varying the speed of movement of the operating unit.

[0030] Preferably, the variation device is configured to vary the speed of the operational units individually depending on the position of the operational unit along the loop path.

[0031] These properties allow the apparatus for non-contact processing of ribbon-like articles to vary the speed of each of the operating units to move at different speeds along the loop path it travels.

[0032] In this way, the speed of the operating unit can be appropriately adjusted so that the correct relative speed between the ribbon-like article and the operating unit itself is provided when performing non-contact processing, while the speed can be varied when it is not necessary to control it.

[0033] These properties allow ribbon-like articles to be fed continuously and / or at higher speeds than known solutions, so as to increase the productivity of production lines in which devices made according to the above-described aspects of the invention are applied.

[0034] In a second aspect thereof, the present invention relates to a method for contactless processing of ribbon-like articles, preferably for the production of electrochemical cells.

[0035] Preferably, the method comprises the step of disposing at least two operating units configured to perform a non-contact treatment on the ribbon-like article, the operating units being preferably movable along a loop path including a treatment portion where the operating units face the ribbon-like article.

[0036] Preferably, the method includes the step of causing the ribbon-like article to be fed at a feed rate on a conveying device.

[0037] Preferably, the method includes a step of performing a predetermined non-contact processing on the ribbon-like article by at least one operating unit while the ribbon-like article moves at a feed speed and the at least one operating unit moves along the processing section at a first speed.

[0038] Preferably, the method includes a step of increasing the speed of at least one operating unit at a reset portion of the loop path to a second speed faster than the first speed when the non-contact processing of the ribbon-like article is completed.

[0039] The method according to this aspect of the invention allows the operational unit to be provided with two different speeds, a first speed used to perform non-contact processing on the ribbon-like article and a second speed used when the operational unit is not performing processing, in this way allowing the optimal speed to be adopted during processing of the operational unit without affecting the productivity of the apparatus.

[0040] In a third aspect thereof, the present invention relates to an apparatus for contactless processing of ribbon-like articles, preferably for the production of electrochemical cells.

[0041] Preferably, the apparatus comprises a conveying device for conveying a ribbon-like article comprising an inlet portion, an outlet portion and a connection extending between the inlet portion and the outlet portion.

[0042] Preferably, the apparatus comprises at least two operating units configured to perform a contactless treatment on the ribbon-like article, which operating units are preferably movable along a loop path, such loop path preferably comprising a treatment section facing a connection section along which the operating units can perform a contactless treatment on the ribbon-like article.

[0043] Preferably, the conveying device is configured to feed the ribbon-like articles along the connection portion at a feed rate and the operating unit is configured to move along the processing portion at a first speed.

[0044] Preferably, the speed difference between the first speed and the feed speed is below a predetermined value.

[0045] These properties allow the device for non-contact processing of ribbon-like articles to operate by maintaining the speed difference between the ribbon-like article and the operating unit below a certain value, which allows the operating unit to perform the envisaged non-contact processing.

[0046] In this way, ribbon-like articles can be supplied continuously and / or at higher speeds than with known solutions, thereby increasing the productivity of the production line in which the device made according to the above-described aspect of the invention is applied.

[0047] In a fourth aspect thereof, the present invention relates to a method for contactless processing of ribbon-like articles, preferably for the production of electrochemical cells.

[0048] Preferably, the method comprises the step of disposing at least two operating units configured to perform a non-contact processing on the ribbon-like article, the operating units being preferably movable along a loop path, the loop path preferably comprising a processing section, where the operating units face the ribbon-like article, and a reset section.

[0049] Preferably, the method includes the step of feeding the ribbon-like article on a conveying device at a feed rate.

[0050] Preferably, the method includes a step of performing a predetermined non-contact processing on the ribbon-like article by at least one operating unit while the ribbon-like article moves at a feed speed and the at least one operating unit moves at a first speed along the processing section.

[0051] Preferably, the speed difference between the first speed and the feed speed is below a predetermined value.

[0052] The method according to this aspect allows contactless treatment of the ribbon-like article while the operating unit performing the treatment is moving, and at the same time allows the speed difference between the operating unit and the ribbon-like article itself to be controlled, which is always beneficial for the productivity of the device and the production line to which it is applied.

[0053] In a fifth aspect thereof, the present invention relates to a method for contactless processing of ribbon-like articles, preferably for the production of electrochemical cells.

[0054] Preferably, the method includes the step of disposing at least two operational units configured to perform a contactless treatment on the ribbon-like article, the operational units being preferably movable along a loop path, the loop path preferably comprising a treatment section where the operational units face the elongate article, and a reset section following the treatment section along the loop path, the operational units being preferably moved such that one is disposed at a different position on the loop path from the other.

[0055] Preferably, the method includes the step of providing an operational unit with a set of processing instructions for performing a predetermined non-contact processing on the ribbon-like article.

[0056] Preferably, the method includes the step of supplying a ribbon-like article on a conveying device.

[0057] Preferably, the method includes a step of performing, by at least one operating unit, a predetermined non-contact treatment on the ribbon-shaped article, which is provided to the operating unit, while the ribbon-shaped article moves on the conveying device and the at least one operating unit moves along the treatment section.

[0058] Preferably, the method includes the step of providing one of the operational units with a further set of processing instructions for performing a further predetermined non-contact processing on the ribbon-like article as the operational unit passes along the reset section.

[0059] Preferably, the method includes a step of subjecting the ribbon-like article by the operational unit to a further predetermined non-contact treatment provided to the operational unit while the ribbon-like article moves at a feed speed and the operational unit moves along the treatment section.

[0060] These properties allow the method for contactless processing of ribbon-like articles to allow the operational units to perform periodic processing on the ribbon-like articles, even if the processing pace does not correspond to, and is not a multiple or submultiple of, the time required for the operational units to move along the entire loop path. In fact, the operational units can be reprogrammed by providing appropriate processing instructions during the passage through the reset section, thus eliminating any lack of synchronization between the processing pace and the movement of the units.

[0061] In this way, the same device can be used to perform different types of processes, since it is not necessary to provide specific geometric relationships between the components that respectively determine the movement of the operating units and the ribbon-like article within the device, in other words, the above-mentioned aspects simplify the so-called change of form operation.

[0062] The present invention, in at least one of the above-mentioned aspects, may have at least one of the further preferred features described below.

[0063] In a preferred embodiment, the operating unit as described above is configured to move along the reset portion of the loop path at a second speed that is faster than the first speed. Preferably, the variation device is configured to vary the speed of the operating unit from the first speed to the second speed and vice versa.

[0064] This characteristic allows the speed of the operational unit to be increased when the ribbon-like article is not being processed, thus compensating for the slowdown in the operational unit while the ribbon-like article is being processed by the increased speed in the reset section.

[0065] Preferably, the first speed is slower than and corresponds to the feed speed of the ribbon-like article in the processing section, in this way, a configuration can be obtained in which the operating unit follows the ribbon-like article, and this configuration allows a maximum feed speed of the ribbon-like article that is compatible with the processing capacity of the operating unit to be obtained.

[0066] In some embodiments, the connection extends along an arc of a circle and defines a center of curvature, and the motion unit is rotatable about an axis of rotation that passes through the center of curvature.

[0067] The above-mentioned characteristics allow for a compact solution to be obtained for the manufacture of the apparatus, using wheels for moving the ribbon-like article in the area where the processing takes place and employing a rotary motion unit having an axis of rotation concentric with the arc of a circle defined by the ribbon-like article during its movement.

[0068] Preferably, the loop path is closed. In some embodiments, the loop path is formed by a circumference. All the above mentioned characteristics contribute to the continuous movement of the operating unit during operation of the device, possibly forming a complete rotation.

[0069] Preferably, the processing portion and the reset portion are each part of the circumferential portion.

[0070] In this way, a simple and clear separation can be achieved between steps in which the action unit performs processing and moves at a constant speed, and steps in which the action unit does not perform processing and provides different speeds.

[0071] Preferably, the operating units are supported on respective arms extending radially from the rotor.

[0072] In this way it is possible to simply support the operating units and position them in a position suitable for the required processing, limiting the inertial mass present in the device.

[0073] In some embodiments, the arms are supported on respective rings that extend circumferentially relative to the rotor and are rotatably constrained thereto.

[0074] This characteristic allows the arm to be accurately supported on the rotating bodies, and relative movement between the ring body and the rotating bodies allows the rotational speed of one of the rotating bodies to be increased or decreased simultaneously.

[0075] Preferably, the rotor is hollow and configured to allow the passage of the light beams transmitted to each arm through respective slots formed in the rotor.

[0076] This property allows the laser to be used to perform the process and simply provide a light beam corresponding to the process area defined by the operating units.

[0077] Preferably, the rotor comprises a further slot arranged radially opposite the slot, through which a support projects towards the inside of the rotor, the support carrying a reflecting element connected to each ring and arranged to intercept the light beam at the axis of rotation, the reflecting element being adapted to deflect the light beam towards the respective arm.

[0078] In this way, a single light beam can be directed to each operating unit, simplifying the manufacture of the device.

[0079] Preferably, the operational units are configured to be arranged at distinct positions along the loop path such that at least one operational unit is arranged at a processing portion of the loop path to perform a non-contact processing on the ribbon-like article. Preferably, the apparatus comprises at least three operational units, at least two of which are arranged at a processing portion of the loop path to perform a non-contact processing on the ribbon-like article. Preferably, the apparatus comprises at least six operational units, at least five of which are arranged at a processing portion of the loop path to perform a non-contact processing on the ribbon-like article.

[0080] These characteristics ensure continuous processing of ribbon-like articles since the operating units are always in a suitable position to perform the required processing, and provide the speed control required by the above-mentioned aspects of the invention.

[0081] Preferably, the operational units are movable along the loop path independently of each other, in this way the speed of each operational unit can be controlled independently of the other operational units depending on the needs of a particular operation.

[0082] Preferably, the variation device is configured to move each arm individually along the circumferential direction of the rotor.

[0083] In this way, velocity changes can be achieved through mechanical motion mechanisms, reducing the need for electronic components and position sensors.

[0084] Preferably, the variation device comprises a first rod rotatably connected to the rotor and a second rod rotatably connected at its first end to the arm and at its second end to the first rod, whereby rotation of the first rod causes a relative movement of the arms. Preferably, the variation device is configured to move the respective arms relative to the rotor when the arms are in the reset section. Preferably, the operating unit is configured to perform a non-contact treatment of the ribbon-like article during feeding of the ribbon-like article along the connection section.

[0085] These properties allow speed regulation by rotation of the rod, which is a particularly simple, effective and generally reliable solution from a constructional point of view, and also allows changes to be realised in the reset region after the treatment has been completed.

[0086] In some embodiments, the transport device comprises a main wheel having a connection defined there along, preferably the main wheel comprises a circumferential wall configured such that the ribbon-like article is supported on the circumferential wall outboard of the main wheel, and further configured such that an edge of the ribbon-like article protrudes axially from the circumferential wall.

[0087] In this way, the ribbon-like article can be appropriately positioned to perform specific treatments at its edges, making the device particularly suitable for the realization of electrochemical cells.

[0088] Preferably, the operating unit is disposed inwardly relative to the outer peripheral wall so as to face the ribbon-like article.

[0089] Preferably, the apparatus comprises a suction device arranged externally relative to the main wheel along at least a part of its circumference.

[0090] In this way, a particularly compact solution for the operating unit can be adopted, leaving space available for the installation of a suction device which can be used to remove the processing residues.

[0091] In some embodiments, the operating units are positioned inward and outward relative to the perimeter wall to perform processing on both sides of the ribbon-like article.

[0092] In this way, two different treatments can be carried out simultaneously on both sides of a ribbon-like article, greatly increasing productivity.

[0093] Preferably, the main wheel is rotatable about its axis of rotation at a constant rotational speed, in this way it is possible to ensure that the feed rate of the ribbon-like article is constant.

[0094] In some embodiments, the inlet portion includes a first wheel and the outlet portion includes a second wheel.

[0095] This characteristic makes it possible to realize a compact structure which can ensure high productivity.

[0096] Preferably, the apparatus comprises a protection element arranged along the loop path at the reset section, the protection element being configured to prevent the operating units from performing operations on the ribbon-like articles along the reset section.

[0097] This characteristic makes it possible to prevent an operating unit capable of performing processing without contact from accidentally performing processing on a ribbon-like object outside the operating section.

[0098] Preferably, the operating unit comprises a galvanometer. Preferably, the operating unit comprises a movable processing element configured to perform non-contact processing on the ribbon-like article. The movable processing element is preferably configured to have a response time on the order of a few milliseconds. In some embodiments, the movable processing element comprises a movable mirror.

[0099] Each of these characteristics contributes to making the device particularly suitable for processing with a laser intended to realize patterns on ribbon-like articles: the relative speed of the ribbon-like article with respect to the motion unit can be significantly reduced, so that the accuracy of the processing obtained through the movable element is practically independent of the absolute speed of the ribbon-like article.

[0100] Preferably, the operational unit is configured to move along the reset portion of the loop path at a second speed that is faster than the first speed.

[0101] This characteristic allows the speed of the operational unit to be increased when the ribbon-like article is not being processed, thus compensating for the slowdown in the operational unit while the ribbon-like article is being processed by the increased speed in the reset section.

[0102] Preferably, the first speed is slower than and consistent with the linear feed speed of the ribbon-like article.

[0103] In this way, a configuration can be obtained in which the operating unit follows the ribbon-like article, thereby obtaining a maximum feed rate of the ribbon-like article that is compatible with the processing capacity of the operating unit.

[0104] In some embodiments, these operating units rotate about a rotation axis, in this way the movement of the operating units can be performed simply, easily and controllably.

[0105] Preferably, each of the operating units moves at a separate position along the loop path such that at least one operating unit performs a non-contact processing on the ribbon-like article when the operating unit is disposed in the processing unit and the other operating unit is disposed in the reset unit. Preferably, it is envisaged to provide at least three operating units, at least two of which are disposed in the processing unit and perform a non-contact processing on the ribbon-like article simultaneously when the remaining operating units are disposed in the reset unit. Preferably, it is envisaged to provide at least six operating units, at least five of which are disposed in the processing unit and perform a non-contact processing on the ribbon-like article simultaneously when the remaining operating units are disposed in the reset unit.

[0106] This characteristic ensures continuous processing of ribbon-like articles since the operating unit is always in a suitable position to perform the required processing, and provides the speed control required by the above-mentioned aspects of the invention.

[0107] Preferably, the speed of the operational units is varied individually depending on the position along the loop path. This feature allows the speed of the operational units to be varied depending on the position in the loop path, to accommodate the specific operational needs associated with each portion of the path.

[0108] In some embodiments, the operating units are supported on arms constrained to the rotor. The speed of each of the operating units is changed by moving each arm relative to the rotor while the rotor moves. The arms are movable independently of each other. Preferably, the speed of each of the operating units is increased by moving each arm in one direction relative to the rotor and decreased by moving each arm in the opposite direction.

[0109] These characteristics allow speed changes to be achieved through mechanical motion mechanisms, reducing the need for electronic components and position sensors.

[0110] Preferably, the ribbon-like article is wound on a main wheel of the conveying device. Preferably, the ribbon-like article is fed with a constant speed and tension on the conveying device.

[0111] These properties allow for consistent movement of the ribbon-like article while ensuring consistent tension during its movement.

[0112] In some embodiments, the ribbon-like article protrudes axially relative to the outer peripheral wall of the main wheel, in this way the ribbon-like article can be appropriately positioned to undergo a particular processing at one of its edges, facilitating processing of the ribbon-like article for the production of electrochemical cells.

[0113] In some embodiments, the method includes moving the movable processing elements of the operating units at a speed faster than the feed speed of the ribbon-like article, preferably with a response time of the movable processing elements of the order of a few milliseconds, in order to perform non-contact processing, and each of these characteristics contributes to making the apparatus particularly suitable for processing with lasers intended to realize patterns on ribbon-like articles.

[0114] Preferably, the reset section follows the treatment section along the loop path, in this way the speed of the motion units can be changed within the reset section of the loop path as the ribbon-like article is subjected to treatment.

[0115] Preferably, it is envisaged to provide the operational unit with a set of processing instructions based thereon for performing the predetermined non-contact processing on the ribbon-like article before performing the predetermined non-contact processing on the ribbon-like article.

[0116] Preferably, after the at least one operating unit has performed a predetermined non-contact processing on the ribbon-like article, it is envisaged that a second set of processing instructions is provided to the at least one operating unit for performing a further predetermined non-contact processing on the ribbon-like article as the at least one operating unit passes along the reset section.

[0117] Preferably, it is envisaged that while the ribbon-shaped article moves at a feed speed and the operational units move along the processing section, the ribbon-shaped article is subjected by at least one operational unit to a further predetermined non-contact processing provided to the operational unit.

[0118] These characteristics also allow the same device to be used for different forms of processing, since it is not necessary to assume specific geometric ratios between the components that cause the respective movements of the operating units and the ribbon-like articles within the device.

[0119] Preferably, the non-contact treatment is carried out by supplying energy to the ribbon-like article.

[0120] Preferably, energy is delivered to the ribbon-like article via a light beam or ultrasound.

[0121] Preferably, the non-contact treatment is a non-contact laser treatment and is thus carried out using a laser.

[0122] Preferably, the operating unit is a laser head.

[0123] Preferably, the non-contact process comprises a patterning or etching process.

[0124] It should be noted that some steps of the above-described methods may be performed in an order independent of the order in which they are described. Furthermore, some steps may be optional. Furthermore, some steps of the methods may be performed iteratively, or in series or parallel with other steps of the methods. [Brief description of the drawings]

[0125] The features and advantages of the invention will become apparent from the detailed description of preferred embodiments thereof, given as non-limiting examples with reference to the accompanying drawings, in which: [Figure 1] 1 is a perspective view of an apparatus made in accordance with the present invention; [Diagram 2] FIG. 2 is a plan view of the device according to the invention; [Diagram 3] FIG. 2 is a partial side view of the device according to the invention. [Figure 4] 2 is a further perspective view of the device according to the invention, with protective elements removed for clarity of illustration; [Diagram 5] FIG. 2 is a schematic plan view of an alternative embodiment of the device according to the invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0126] Referring initially to FIG. 1, an apparatus for performing non-contact processing on a ribbon-like article N made in accordance with the present invention is generally designated by the reference numeral 100.

[0127] In a preferred embodiment, the ribbon-like article N, which the apparatus 100 performs contactless processing on, is intended for the production of electrochemical cells.

[0128] For this purpose, the processing can be represented by the realization of a pattern on the longitudinal edge B of a ribbon-like article N. Indeed, in the field of production of electrochemical cells, the anodes and cathodes are obtained by winding up sheets of appropriately treated conductive material. Such processing typically involves the realization of a particular pattern on the edge of a sheet of conductive material. The sheets thus treated are advantageously realised starting from a ribbon-like article in which the pattern is repeated periodically and which is then cut into individual sheets.

[0129] However, it should be noted that this process represents a possible embodiment, and that the device 100 according to the invention can be intended for other processes, even of different types, for any ribbon-like article.

[0130] As shown in Figure 1, the apparatus comprises a conveying device 1 for supplying a ribbon-like article N during processing. The conveying device 1 may be part of a production line for electrochemical cells or, more generally, for other finished or semi-finished products.

[0131] Although only the inlet portion 11 and the outlet portion 12 of the ribbon-like article N are shown in the figure, other components of the production line may be provided upstream and downstream of these portions, the description of which is not essential for understanding the present invention.

[0132] Preferably, the supply of the ribbon-like goods N is realized by a wheel system. In a preferred embodiment, the conveying device 1 comprises a first wheel 11A, on which an inlet section 11 is defined, a second wheel 12A, on which an outlet section 12 is defined, and a main wheel 13A. The main wheel 13A conveys the ribbon-like goods N from the inlet section 11 to the outlet section 12. Also, on the main wheel 13A, a contactless processing takes place, preferably according to a method described in more detail below. The section between the inlet section 11 and the outlet section 12 is generally called the connection section 13.

[0133] The main wheel 13A is rotatable about a rotation axis X by feeding the ribbon-like article N at a preferably constant feeding speed.

[0134] As better shown in FIG. 3, the main wheel 13A comprises a peripheral wall 14 on the outside of which the ribbon-like article N is supported during movement.

[0135] Advantageously, the peripheral wall 14 is configured such that the edge B of the ribbon-like article N projects axially from the peripheral wall 14, ie along the axis of rotation X.

[0136] In this way, edge B of the ribbon-like article N can be subjected to a non-contact treatment by the operating unit 2 facing edge B. For example, operating unit 2 can be a laser head operating non-contact on edge B of the ribbon-like article to create a pattern.

[0137] For this purpose, in a preferred embodiment, the operating unit 2 can comprise a galvanometer 2A. Advantageously, the use of the galvanometer 2A can provide the presence of a movable processing element 23. This preferably comprises a mirror 23A that is rapidly moved, for example with a response time of the order of a few milliseconds, to direct a light beam on the ribbon-like article N, in particular on the edge B, to carry out a specific processing.

[0138] In some embodiments, the operating units 2 are supported on respective arms 21 extending radially from a rotor 22 that allows their movement according to a method described in more detail below.

[0139] As better shown in the embodiment of FIG. 3, the arms 21 may be supported on respective ring bodies 24 that extend circumferentially relative to the rotor 22 and are rotatably constrained thereto.

[0140] Preferably, the rotor 22 is hollow and configured to allow the passage of the light beam L so that non-contact processing can be performed on the ribbon-like article N. A slot 41 can be formed in the rotor 22 in each arm 21 to transmit the light beam L to the operating unit 2.

[0141] In some embodiments, the rotor 22 can include a further slot 42 arranged radially opposite the slot 41. Through this further slot 42 a support 40 connected to one of the ring bodies 24 and supporting a reflective element 43 protrudes into the rotor 22.

[0142] Advantageously, the reflecting elements 43 are arranged to intercept the light beam L, preferably at the axis of rotation X, and to deflect the beam towards the respective arm 21. The reflecting elements 43 may also be further configured to pass a part of the beam L along the axis X to a subsequent reflecting element 43. In this way, the same beam can be used for all operating units 2 in the apparatus 100.

[0143] 1 and 2, in a preferred embodiment, the operating unit 2 moves along the loop path 3 to follow the ribbon-like article N as it is fed through the main wheel 13A, or more generally along the connection 13. In other words, the operating unit 2 can move at a speed slower than and in a direction consistent with the feed speed va of the ribbon-like article N.

[0144] In a preferred embodiment, the loop path 3 is preferably formed by a circumference coaxial with the arc of a circle defining the connection 13 on the wheel 13A. It is noted, however, that more generally, the loop path 3 can be closed and can have a shape different from a circle, for example as shown in the embodiment of FIG.

[0145] Continuing to refer to FIG. 2, the loop path 3 may be constructed such that the operating unit 2 is disposed inwardly relative to the connection portion 13, preferably inwardly relative to the outer peripheral wall 14, facing the ribbon-like article N.

[0146] Such an arrangement facilitates the possibility of arranging a suction device 6 externally to the main wheel 13A in order to remove processing residues such as may occur in the case of non-contact laser processing.

[0147] In some embodiments, there may be two or more operating units 2 located both inside and outside the outer peripheral wall 14 of the wheel 13A (not shown).

[0148] In this way, non-contact processing operations, possibly of different types, can be carried out simultaneously on both sides of the ribbon-like article N.

[0149] In this case too, a suction device 6 may be provided, which may possibly be arranged further outwards with respect to the group of operating units 2 arranged outwards with respect to the circumferential wall 14.

[0150] As shown in the figure, in a preferred embodiment the apparatus 100 comprises at least three operating units 2 arranged at different positions along the loop path 3. In a further preferred embodiment the apparatus comprises at least six operating units 2.

[0151] It should be noted, however, that the present application is also applicable to a different number of operational units 2. In particular, the device 100 may comprise two or more operational units 2.

[0152] As shown in FIG. 2, the loop path 3 includes a processing unit 31 and a reset unit 32, and the path 3 is preferably ideally divided.

[0153] In this regard, it is noted that in the preferred embodiment, the processing unit 31 and the reset unit 32 form respective angular sectors that together preferably subtend an angle of 360°.

[0154] Thus, in a preferred embodiment, the operating unit 2 can be alternately located in the processing section 31 and in the reset section 32 during its movement about the axis X.

[0155] As described above and as shown in Fig. 3, the operating unit 2 can face the edge B of the ribbon-like article N along the processing section 31 and perform a predetermined non-contact processing. Preferably, a protection element 15 can be provided along the reset section 32, arranged to face the operating unit 2 when the operating unit 2 is in the reset section 32 and interposed between the operating unit 2 and the ribbon-like article N. In this way, it is possible to prevent the light beam generated by the operating unit 2 or another emitting energy source from reaching the ribbon-like article N at a different position relative to the processing section 31.

[0156] Preferably, the operational units 2 are configured such that at each moment of operation of the apparatus 100, at least one of the operational units is arranged in a treatment section 31 of the loop path 3 to perform a contactless treatment on the ribbon-like article N. With reference to further possible embodiments, in the case of three operational units 2 as shown in the figure, at least two of them are preferably arranged in the treatment section, and in the case of six operational units 2, at least three of them are preferably arranged in the treatment section.

[0157] Operation of the device 100 allows the operating units 2 to move in different ways, in particular at different speeds, in the processing part 31 and the reset part 32 of the loop path.

[0158] Advantageously, the speed of the operational unit 2 along the processing section 31 may be selected to have a relative movement between the operational unit 2 and the ribbon-like article N suitable for performing the intended processing. Thus, the speed difference Δv between the first speed v1 of the operational unit 2, which represents its speed along the processing section 31, and the feed speed va of the ribbon-like article N may be less than a predetermined value.

[0159] This value may be determined based on the intended type of processing and the technical characteristics of the operational unit 2.

[0160] Within the reset section 32, the operational unit 2 can have a second speed v2 that is different from the first speed v1.

[0161] In a preferred embodiment, this speed difference allows the operational unit 2 to feed the ribbon-like article N at a first speed v1 that is slower than the feed speed va, and to compensate for this speed difference at the reset section 32 where the operational unit 2 is accelerated. In other words, the second speed v2 is faster than the first speed v1.

[0162] The speed change of the operating units 2 is preferably realized by a variation device 4 for varying the speed of movement of the operating units 2. This is configured to vary the speed of each of the operating units 2 individually depending on the position along the loop path 3.

[0163] Thus, in a preferred embodiment, the variation device 4 may be configured to change the speed of the operating unit 2 from a first speed v1 to a second speed v2 when moving from the processing unit 31 to the reset unit 32, and from the second speed v2 to the first speed v1 when moving from the reset unit 32 to the processing unit 31.

[0164] Preferably, the movement device 4 acts on each of the arms 21, enabling them to move individually along the rotor 22. As shown in Fig. 3, the arms 21 can be rotated relative to the body 22 by rotation of the ring body 24 about the axis X. In other words, the body 24 can slide on the outer circumferential surface of the rotor 22, thereby enabling the arms 21 it supports to move.

[0165] As the embodiment of FIG. 4 shows, movement of the body 24, or more generally of the arm 21, can be performed by a first rod 51 rotatably connected to the rotor 22 and a second rod 52 rotatably connected at its first end to the arm 21 and at its second end to the first rod 51.

[0166] Thus, when the first rod 51 is rotated, there is obtained a corresponding movement of the second rod 52 and thus a movement of the relative arms 21. This rotation of the rods 51 can be performed at a specific position of the operating unit 2 along the loop path 3. Also, the rods 51 of each arm 21 can be rotated independently of the other rods, which allows each arm 21 to be moved independently of the other arms.

[0167] Preferably, the variation device 4 is configured to move the arm 21 relative to the rotor 22 in a direction that coincides with its direction of rotation, such that the arm 21 is in fact accelerated when it is in the reset section 32. Advantageously, the arm 21 is moved in the opposite direction, such that the arm is decelerated when it is in the treatment section 31.

[0168] In this way, differences accumulated during processing of the ribbon-like article N along the processing section 31 can be restored in the subsequent reset section 32.

[0169] It should also be noted that the passage of the operational unit 2 through the reset section 32 can be advantageously used to provide instructions useful for carrying out a particular process on the ribbon-like article N.

[0170] In this regard, it should be noted that even when implementing a repetitive pattern, the repetition pace of the pattern does not necessarily coincide with the pace of the operational units 2, i.e. the time required to move along the loop path 3 or, in the case of more than two operational units, the time required for further operational units to reach the processing unit 31 again. Thus, the set of processing instructions initially provided to the operational units 2 may no longer be correct taking into account such circumstances.

[0171] The passage of an operational unit 2 along the reset portion 32 may also be advantageously used to modify the processing instructions provided to the operational unit to perform a particular processing operation.

[0172] In other words, a second set of processing instructions can be provided along with the reset section 2 which takes into account the different pace mentioned above, effectively changing the processing performed by the operational unit 2 on return to the processing section 31.

[0173] This second set of processing instructions can therefore take into account the different pace between the ribbon-like article N and the operational unit 2, for example by restarting the processing of the pattern at an appropriate position.

[0174] It goes without saying that those skilled in the art can make further modifications and variations to meet the needs of specific and fortuitous applications, while still falling within the scope of protection defined by the appended claims.

Claims

1. An apparatus (100) for contactless processing of ribbon-like articles (N), preferably for the production of electrochemical cells, comprising: a conveying device (1) for conveying said ribbon-like article, comprising an inlet portion (11), an outlet portion (12) and a connection portion (13) extending between said inlet portion (11) and said outlet portion (12); at least two operational units (2) configured to perform a non-contact treatment on the ribbon-like article (N), the operational units (2) being movable along a loop path (3), the loop path (3) including a treatment section (31) facing the connection section (13) along which the operational units (2) perform a non-contact treatment on the ribbon-like article (N); Equipped with a variation device (4) for varying the speed of movement of the operational units (2), the variation device (4) being configured to vary the speed of each of the operational units (2) individually depending on their position along the loop path (3); Device.

2. 2. The apparatus according to claim 1, wherein the operating unit (2) is configured to move along the reset portion (32) of the loop path (3) at a second speed (v2) faster than the first speed (v1), and the variation device (4) is preferably configured to vary the speed of the operating unit from the first speed (v1) to the second speed (v2) and vice versa.

3. 3. Apparatus according to claim 1 or 2, wherein the conveying device (1) is configured to supply the ribbon-like article along the connection at a supply speed (va) and the operating unit (2) is configured to move along the processing section (31) at a first speed (v1), the speed difference (Dv) between the first speed (v1) and the supply speed (va) being below a predetermined value.

4. The apparatus according to any one of claims 1 to 3, wherein the first speed (v1) is slower than and synchronous in direction with the linear feed speed (va) of the ribbon-like article in the processing section (31).

5. The apparatus according to any one of claims 1 to 4, wherein the connection portion (13) extends along an arc of a circle and defines a centre of curvature, and the operating unit (2) is rotatable about an axis of rotation (X) passing through the centre of curvature.

6. Apparatus according to any one of the preceding claims, wherein the operating units (2) are supported on respective arms (21) extending radially from a rotating body (22).

7. 7. Apparatus according to claim 6, wherein the arms (21) are supported on respective ring bodies (24) extending circumferentially relative to the rotor (22) and rotatably constrained thereto.

8. 8. The device according to claim 5, 6 or 7, wherein the rotor (22) is hollow and configured to allow the passage of a light beam transmitted to each of the arms (21) through a respective slot (41) formed in the rotor (22), the rotor (22) being provided with a further slot (42) preferably arranged at a position radially opposite the slot (41) through which a support (40) projects towards the inside of the rotor (22), the support being connected to each of the ring bodies (24) and configured to support a reflective element (43) arranged to intercept the light beam at the rotation axis (X) and to deflect the light beam towards the respective arm (21).

9. The apparatus according to any one of claims 6 to 9, wherein the variation device (4) is configured to move each of the arms (21) individually along the circumferential direction of the rotating body (22), and the variation device (4) is preferably configured to move each of the arms (21) relative to the rotating body (22) when the arms (21) are in the reset portion (32).

10. 11. The apparatus of claim 10, wherein the movement device (4) comprises a first rod (51) rotatably connected to the rotating body (22) and a second rod (52) rotatably connected at its first end to the arm (21) and rotatably connected at its second end to the first rod (51), whereby rotation of the first rod (51) causes a movement of the corresponding arm (21).

11. The apparatus according to any one of claims 1 to 10, wherein the non-contact treatment is performed by supplying energy to the ribbon-like article.

12. The apparatus of claim 11 , wherein the energy is delivered to the ribbon-like article via a light beam or ultrasound.

13. The apparatus of claim 12 , wherein the non-contact process is a non-contact laser process.

14. 14. Apparatus according to claim 13, wherein the operating unit (2) is a laser head.

15. The apparatus of any one of claims 1 to 14, wherein the non-contact process comprises a patterning or etching process.

16. A method for contactless treatment of a ribbon-like article (N), preferably for the production of an electrochemical cell, comprising the steps of: Arranging at least two operating units (2) configured to perform a non-contact treatment on the ribbon-like article (N), the operating units (2) being movable along a loop path (3), the loop path (3) comprising a treatment section (31) where the operating units face the ribbon-like article (N); feeding said ribbon-like article (N) on a conveying device (1) at a feeding speed (va); performing a predetermined non-contact treatment on the ribbon-like article (N) by at least one of the operating units (2) while the ribbon-like article (N) moves at the feed speed (va) and the at least one operating unit (2) moves at a first speed (v1) along the processing section (31); Increasing the speed of at least one of the operating units (2) to a second speed (v2) in a reset section (32) of the loop path (3), the second speed (v2) being higher than the first speed (v1) when the non-contact processing of the ribbon-like article (N) is completed; A method comprising:

17. 17. The method of claim 16, wherein the speed difference (Dv) between the first speed (v1) and the feed speed (va) is below a predetermined value, and the first speed (v1) is slower than the linear feed speed (va) of the ribbon-like article and its direction is synchronous.

18. 18. The method according to claim 16 or 17, wherein the speeds of the operating units (2) are varied individually depending on the position along the loop path (3).

19. 19. The method of claim 18, wherein the operating units (2) are supported on arms (21) constrained to a rotating body (22), the speed of each of the operating units (2) being varied by movement of the respective arms (21) relative to the rotating body (22) while the rotating body (22) rotates, and the arms are movable independently of each other.

20. 20. The method of claim 19, wherein the speed of each of the operating units (2) is increased by moving the respective arm (21) in one direction relative to the rotor (22) and is decreased by moving the respective arm (21) in the opposite direction.

21. The method according to any one of claims 16 to 20, wherein the step of performing a predetermined treatment by at least one operating unit (2) comprises the step of supplying energy to the ribbon-like article.

22. 22. The method of claim 21, comprising providing energy to the ribbon-like article via a light beam or ultrasound.

23. 23. The method of claim 22, wherein the non-contact processing is performed with a laser.

24. The method according to any one of claims 16 to 23, wherein the non-contact process comprises a patterning or etching process.

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