embossing cassette

Description

1 / 23 embossing cassette Request for division of application BR112021023031-9 filed on 01 / 13 / 2021. FIELD OF TECHNIQUE

[001] The present invention relates to the field of embossing a fabric material and, more particularly, to the field of online embossing. BACKGROUND OF THE INVENTION

[002] Patent DE 10212172A1 describes a system comprising at least one embossing cassette with two counter-rotating embossing rollers. The embossing cassettes are arranged on a support plate and can be slid in predefined grooves of the plate from a working position to a resting position. At least one replacement embossing cassette is on the plate in a replacement position such that it can be replaced by the working embossing cassette in the working position. In addition, at least one spare embossing cassette is slidably placed on the support plate in a spare position such that it can be replaced by the replacement embossing cassette in the replacement position. The system of Patent DE 10212172A1 allows for a quick replacement of an embossing cassette by means of manual sliding with the replacement embossing cassette in the replacement position.However, this patent document does not mention any pre-alignment of the rollers in the embossing cassette, nor any circumstances in which such an operation would be performed. The system described in that patent implies a comparatively large footprint for its implementation. The system also requires several assembly steps by a qualified operator, such as, for example, fixing the embossing cassette, engaging the power supply, and assembling the pressure gear. Furthermore, this patent document does not indicate any information about the accuracy of the... Petition 870260036884, dated 04 / 20 / 2026, page 9 / 82 2 / 23 tolerances for alignment and positioning of the rollers and embossing cassette, nor does it present any method for adjusting them.

[003] Patent EP 1721742A2 describes a system comprising an embossing cassette with two counter-rotating embossing rollers. The embossing rollers are mounted in a body by means of fastening devices, which are configured in such a way that a roller can move within the embossing cassette along the direction of its axis of rotation and in such a way as to allow relative positioning between the axes of rotation of the rollers around an axis of inclination perpendicular to the axes of rotation. The alignment of the embossing rollers is done while the embossing cassette is assembled on the production line. However, this patent document does not mention any pre-alignment of the rollers in the embossing cassette before it is introduced into the production line, nor any circumstance under which this would be done.The system also requires several assembly steps by a qualified operator, such as positioning and aligning the embossing rollers within the embossing cassette in the production environment. Furthermore, this patent document does not provide any information regarding the accuracy of the alignment and positioning tolerances of the rollers and the embossing cassette, nor does it present any method for adjusting them.

[004] US Patent 6,665.99 B1 describes interchangeable embossing rollers that are arranged in interchangeable embossing cassettes suitable for embossing systems. An embossing cassette may, for example, take the form of a body with its ends provided with interlocking surfaces. The embossing assembly or structure of an embossing system comprises corresponding seats, which are very precisely adapted to Petition 870260036884, dated 04 / 20 / 2026, page 10 / 82 3 / 23 embossing cassette present. In the inserted condition, that is, when the fitting surfaces of the fastening elements are inserted into the associated seats, the embossing rollers contained in the embossing cassette are placed in their operating position without the need for any additional adjustment operation. In particular, the driven embossing rollers of such an embossing system are therefore substantially less complicated to change, thus allowing for quick maintenance and production changes.

[005] It has been found that the embossing cassette and its embossing structure, as known from the prior art, may in fact not require any additional adjustment operation for the embossing rollers, but this detail is not sufficient in the case where the rollers are comparatively long, and consequently also heavier. Furthermore, the system described in this prior art operates at a predefined contact pressure between the embossing rollers and does not allow the use of any differential pressure. Thus, there is a need for a system and corresponding adjustment method for an embossing cassette that is designed for comparatively large embossing rollers, particularly for online embossing.

[006] The present invention addresses these and other problems. SUMMARY OF THE INVENTION

[007] In a first aspect, the present invention provides an embossing system comprising an embossing structure and an embossing cassette. The embossing cassette comprises at least two rollers and a body configured to hold the at least two rollers, whereby the at least two rollers are removablely mounted in the body. The embossing structure is configured to removablely house the embossing cassette, and the embossing structure comprises a means for positioning the embossing structure configured to cooperate with a Petition 870260036884, dated 04 / 20 / 2026, page 11 / 82 4 / 23 corresponding means of positioning the embossing cassette body at the moment the embossing cassette is housed in the embossing structure in order to position the embossing cassette in a predetermined position within the embossing structure.The embossing system further comprises a plurality of means for adjusting and correcting the position of a rotation axis of the corresponding roller inside the body, one position of each of the means for adjustment and correction being at one end of at least two rollers, and the plurality of means for adjusting and correcting being configured so as to adjust and correct in at least two of the following: in an axial direction of the corresponding roller, in one of the two dimensions of a plane perpendicular to the axial direction, and the embossing structure is further configured so as to make the plurality of means for adjusting and correcting the position of the rotation axis inaccessible from outside the embossing structure at a time when the embossing cassette is housed inside the embossing structure.

[008] According to a preferred embodiment, the plurality of means for adjusting and correcting comprises a decentralized pin device configured so as to adjust the position of the axis of rotation at one of at least one of each end of at least two rollers, in a first of two dimensions, and at the opposite end of the roller in question, at a fixed center of rotation, which is configured so as to allow the axis of rotation to rotate about the fixed center of rotation around an axis perpendicular to the axis of rotation.

[009] According to another preferred embodiment, the plurality of means for adjusting and correcting further comprises at one end of one of the at least two rollers, a disc notch adjustment mechanism configured so as to adjust the position of the axis of rotation of the corresponding roller in an axial direction. Petition 870260036884, dated 04 / 20 / 2026, p. 12 / 82 5 / 23

[0010] According to another preferred embodiment, the plurality of means for adjusting and correcting further comprises a guide system coupled to each end of one of the rollers, and an actuation mechanism configured so as to actuate the guide system to adjust the position of one of the rollers in a second of the two dimensions.

[0011] According to another preferred embodiment, the plurality of means for adjusting and correcting is at least partially mounted on the body of the embossing cassette.

[0012] According to another preferred embodiment, the embossing structure further comprises a guide means configured so as to orient the embossing cassette during an insertion of the embossing cassette into the embossing structure, in order for the body positioning means to cooperate with the embossing structure positioning means.

[0013] According to another preferred embodiment, the guide means comprises at least one inclined surface configured so as to slide over an element equivalent to the embossing cassette during insertion of the embossing cassette into the embossing structure.

[0014] According to another preferred embodiment, the guide means, the body positioning means, and the embossing structure positioning means are configured so as to achieve a predetermined position within the embossing structure with a tolerance in a range between 0.02 mm and 0.06 mm.

[0015] According to another preferred embodiment, the embossing system further comprises at least one hydraulic or pneumatic jack mounted inside the embossing structure, the at least one hydraulic or pneumatic jack being configured so as to adjust a counter-pressure between the at least two rollers.

[0016] According to another preferred modality, the structure Petition 870260036884, dated 04 / 20 / 2026, page 13 / 82 6 / 23 of embossing comprises at least one first and one second individually removable fixed walls, each allowing respectively insertion into and removal of the embossing structure from the embossing cassette on the side of the first or second wall.

[0017] According to another preferred embodiment, the embossing structure comprises a machine coupling configured so as to couple a drive system to the embossing cassette, thereby allowing at least one of the two rollers of the embossing cassette to be driven.

[0018] According to a second aspect, the present invention provides an embossing cassette comprising at least two rollers, a body configured so as to hold the at least two rollers, whereby the at least two rollers are mounted in a removable manner in the body. The embossing cassette comprises a plurality of means for adjusting and correcting a position of a rotation axis of the corresponding roller inside the body, a location of each of the means for adjusting and correcting being at one end of the at least two rollers, and the plurality of means for adjusting and correcting being configured so as to adjust and correct in at least two of the following: in an axial direction of the corresponding roller inside the body, in one of the two dimensions of a plane perpendicular to the axial direction.

[0019] According to another preferred embodiment, the plurality of means for adjusting and correcting is at least partially mounted on the body of the embossing cassette.

[0020] According to another preferred embodiment, at least two rollers have a length between 100 mm and 5000 mm.

[0021] Still according to another preferred modality, the hair Petition 870260036884, dated 04 / 20 / 2026, p. 14 / 82 7 / 23 minus two rollers are configured for embossing a screen material.

[0022] According to another preferred method, at least two rollers are heated rollers.

[0023] In a third aspect, the present invention provides a method for an off-line adjustment of an embossing cassette, at least comprising the steps of isolating the embossing cassette from an online production line, such that it is in an off-line state, positioning at least one first and one second embossing roller in a body of the embossing cassette, adjusting and correcting the position of at least one of each of the at least first and second embossing rollers mounted in the body of the embossing cassette, actuating a plurality of adjustment and correction means at at least one of each end of the first and second embossing rollers and thus adjusting an axis of rotation in at least two of the following: in an axial direction, in at least one of the two dimensions of a plane perpendicular to the axial direction.

[0024] According to another preferred embodiment, the method further comprises the step of housing the embossing cassette within an embossing structure of the online production chain, thus concealing the plurality of means of adjustment and correction with respect to an exterior of the embossing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be better understood through a detailed description of the preferred embodiments of the invention, and with reference to the appended figures, in which:

[0026] - Figure 1 schematically illustrates an example of an embodiment of an embossing system according to the present invention in a sectional view,

[0027] - Figure 2 schematically represents an end Petition 870260036884, dated 04 / 20 / 2026, p. 15 / 82 8 / 23 of a first roller and its axis of rotation according to the present invention,

[0028] - Figure 3 schematically illustrates another example of an embossing system according to the present invention,

[0029] - Figure 4 schematically illustrates the example in Figure 3, assembled and closed with a side door, this view being private from a side wall, thus allowing an internal view,

[0030] - Figure 5 schematically illustrates an alternative way of introducing the embossing cassette into the embossing structure, according to the present invention.

[0031] - Figure 6 illustrates an embossing system mounted on a rack, according to another exemplary embodiment of the present invention,

[0032] - Figure 7 illustrates an embossing system with optional hydraulic or pneumatic jacks positioned outside the embossing structure, according to an exemplary embodiment of the present invention,

[0033] - Figures 8 to 10 illustrate exemplary embodiments of an embossing cassette configuration with rollers of different diameters, depending on the case,

[0034] - Figure 11 contains a schematic illustration of an exemplary embodiment for adjusting the position of a rotation axis of an embossing roller in an embossing cassette by means of an off-center pin, according to an exemplary embodiment of the present invention.

[0035] - Figure 12 contains a schematic overview of an embossing system with two enlarged portions illustrating mechanisms for adjusting the position of the axis of rotation of the embossing roller in two different directions, according to an exemplary embodiment of the present invention, Petition 870260036884, dated 04 / 20 / 2026, p. 16 / 82 9 / 23

[0036] - Figure 13 contains a schematic overview of a pair of embossing rollers alone, but also within an embossing system, and an embossing cassette according to an exemplary embodiment of the present invention,

[0037] - Figure 14 represents an embossing cassette with a handlebar system according to the example in Figure 13, and

[0038] - Figure 15 contains a flowchart illustrating a process for an offline adjustment of an embossing cassette according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION

[0039] The integration of the prior art technique of an embossing cassette and an embossing frame proves impractical when stamping over a width, for example, greater than 500 mm. One reason for this is that the prior art system is too heavy to be handled by an end user. During this handling, there is a high risk of misalignment of the rollers. Each roller can exceed, for example, 100 kg in mass. Therefore, the use of a hydraulic or pneumatic jack may be necessary to press the rollers against each other to perform embossing, and such a hydraulic or pneumatic jack must be dimensioned accordingly, but can no longer be included in the integration of the prior art.

[0040] The present invention relates to an embossing system comprising an embossing cassette and an embossing frame.

[0041] The embossing cassette is a device that may also be referred to as an embossing head. The embossing system may be constructed in such a way that the embossing cassette comprises at least two embossing rollers and provides the possibility of adjusting the embossing rollers so as to ensure the Petition 870260036884, dated 20 / 04 / 2026, p. 17 / 82 10 / 23 parallelism of their axes to each other.

[0042] The embossing frame is a device configured to house the embossing cassette. The embossing system may also be constructed in such a way that the embossing frame supports the embossing cassette and, optionally, includes a servo motor for at least two embossing rollers.

[0043] The embossing system according to the present invention is best suited for use in online embossing, i.e., in a production line where, for example, more than 1000 sections / min are stamped.

[0044] In this case, the embossing system described herein is suitable for fine embossing of thin sheets or thin packaging sheets with a thickness in the approximate range of 10 μm to 800 μm using the rotational process. This system is well known in the food, pharmaceutical, tobacco, luxury goods, and other industries for embossing thin packaging sheets using rotating embossing rollers. These thin packaging sheets may be intended to be wrapped around a pack of cigarettes or reduced-risk tobacco products, or to be used as packaging material for coffee sachets or tea bags, for chocolate, butter or similar food products, as well as in pharmaceuticals, perfumes, electronic equipment, jewelry or watches.The thin printed sheet could be, for example, any one from a list that includes a metal sheet, a metal sheet laminated with organic substrates, a plastic film laminated with organic substrates such as paper, a polymeric film laminated with organic substrates such as paper, a metallized paper, a metallized polymeric film, a polymeric film, a hybrid polymeric film, or hybrid materials in general.

[0045] With reference to Figure 1, it illustrates a modality Petition 870260036884, dated 04 / 20 / 2026, page 18 / 82 Figure 11 / 23 shows an exemplary embossing system 100 according to the present invention. The embossing system 100 comprises an embossing structure 101 and an embossing cassette 102. The embossing cassette 102 comprises at least two rollers, such as a first roller 103 and a second roller 104, and a body 105, which is configured so as to secure the first roller 103 and the second roller 104. The first roller 103 and the second roller 104 are removablely mounted on the body 105, meaning that they are mounted using a mounting means (a mounting means not shown in Figure 1) that can also be used to disassemble and remove them from the body 105, for example, in a case where they need to be replaced. The embossing cassette 102 and the elements it contains are represented in a sectional view, which, for example, shows the first roller 103 and the second roller 104 divided in a longitudinal direction along their respective axes of rotation.

[0046] The embossing structure 101 is represented only in part in Figure 1, in such a way that its interior can also be seen. For example, it can be noted that the embossing structure 101 comprises a pair of hydraulic or pneumatic jacks 106, which are optional features of the embossing system 100. The embossing structure 101 is configured to house the embossing cassette 102 in a removable manner, which is shown outside the embossing structure 101 in Figure 1, in close proximity to an upper opening 107 of the embossing structure 101 through which the embossing cassette 102 can be introduced into the embossing structure 101. A cover 108 is configured to close the upper opening 107 once the embossing cassette 102 is fully introduced into the embossing structure 101. The cover 108 may optionally be an integral part of the embossing cassette 102 or provided separately from it. Petition 870260036884, dated 04 / 20 / 2026, page 19 / 82 12 / 23 same. The 108 cover may include a means of body positioning.

[0047] The embossing structure 101 further comprises at least one embossing structure positioning means 109, which, for example, may be incorporated as a pin that is part of or firmly fixed to the embossing structure. The embossing structure positioning means 109 is configured to cooperate with the corresponding embossing cassette body positioning means 102 (the body positioning means is not visible in Figure 1), which, in the present example, is incorporated by at least one hole dimensioned to fit into the corresponding embossing structure positioning means 109. There may be numerous embossing structure positioning means 109 positioned at various points on the embossing structure 101, for example, also at points that are configured to be in contact with the cover 108 of the embossing cassette 102.In Figure 1, such embossing frame positioning means 109, which are configured to fit into the corresponding body positioning means in the cap 108, are represented. Therefore, the embossing cassette 102 can be positioned within the embossing frame 101 in a determined manner thanks to the cooperative embossing frame positioning means 109 and the body positioning means. The embossing frame positioning means 109 may have a conical head shape which makes insertion into the corresponding body positioning means comparatively easy. A size tolerance between 0.02 mm and 0.06 mm is typically obtainable in each of the x, y and z axis directions.

[0048] Body 105 may comprise at least one of each end of the first roller 103 and the second roller 104, respectively, a means for adjusting and correcting which is referred to as Petition 870260036884, dated 04 / 20 / 2026, page 20 / 82 13 / 23 reference numerals 110 and 111 for each end of the first roller 103, and 112 and 113 for each end of the second roller 104. Each means for adjusting and correcting 110 to 113 can adjust and correct a position of a rotation axis of the corresponding first and second rollers 103 and 104, within the body 105, i.e., with respect to the body 105.

[0049] For explanatory purposes, Figure 2 schematically represents one end of the first roller 103 and its axis of rotation 200. For readability, the means for adjusting and correcting 110 is not shown in Figure 2. The axial direction of the axis of rotation 200 is represented by z, while the two dimensions of the plane perpendicular to the axial direction are represented by xe y.

[0050] According to a particular modality represented in Figure 11 shows that the adjustment and correction of the rotation axis 200 in the x direction at one end 1100 of at least two rollers, for example, the second roller 104, can be achieved by an adjustment and correction of approximately ± 0.1 mm using an offset pin 1101. This will allow for an alignment accuracy between the rotation axes of the first and second rollers of 0.01 mm, or 2 arc seconds. The other end 1102 of the second roller 104 is rotationally fixed in a fixed rotation center device 1103, which is configured to allow the rotation axis 200 to rotate around the fixed rotation center 1103 around an axis perpendicular to the rotation axis 200 (the above situation is not shown in Figure 11). In a top representation in Figure 11, marked with the letter A, the off-center pin 1101 is adjusted to a central position.In an intermediate representation in Figure 11, marked with the letter B, the off-center pin 1101 is adjusted to move the axis of rotation 200 in a direction away from the center of rotation 1104 of the off-center pin. In a lower representation in Figure 11,... Petition 870260036884, dated 04 / 20 / 2026, page 21 / 82 14 / 23 with the letter C, the off-center pin 1101 is adjusted to move the rotation axis 200 in one direction toward the center of rotation 1101. After adjusting the off-center pin 1101, it is then locked in the correct position by means of fixing screws (not shown in Figure 11). Next, with reference to Figure 12, it illustrates a schematic overview of an embossing system 100 with two enlarged portions A and B that illustrate the mechanisms for adjusting the position of the rotation axis of the embossing roller in two different directions, respectively, xez, according to an exemplary embodiment of the present invention. The enlarged portion A represents the function of the offset pin 1101, which can be adjusted by means of an offset adjustment cam 1200 and then locked in the correct position by means of the fixing screws 1201-4; these fixing screws are illustrated next to the offset adjustment cam 1200.

[0051] Furthermore, according to another particular embodiment represented in Figure 12, the adjustment and correction of the position of the axis of rotation 200 in the z direction at one end of one of at least two rollers, in this case the end 1102 of the second roller 104, can be done using a disc notch adjustment mechanism 1202 connected to the sprockets 800, as shown in the enlarged portion B of Figure 12, mounted on the respective shaft of the second and first rollers 103 and 104. The disc notch adjustment mechanism 1202 is well known in the art and therefore will not be discussed in further detail. Incidentally, the sprockets 800 are configured to couple the first and second rollers together for synchronous rotation and will be described in more detail below. The adjustment mechanism described in this document allows achieving an alignment accuracy of more than 0.01 mm.

[0052] Next, with reference to Figure 13, it contains Petition 870260036884, dated 04 / 20 / 2026, p. 22 / 82 15 / 23 illustrations of the embossing system 100 aim to explain an example of a system for adjusting the y-direction position of the rotation axis 200 of the second roller 104 relative to the first roller 103 inside the embossing cassette 102. This will become apparent in the middle and lower illustrations labeled B and C in Figure 13, as well as in Figure 14. In the middle part of Figure 13, labeled B, the first and second rollers 103 and 104 are shown inside the embossing cassette 102, which is housed within the embossing structure of the embossing system 100. The Y arrows illustrate the direction of the adjustments that should be obtained in the y-direction at both ends of the second roller 104. In the lower part of Figure 13, labeled C, the first and second rollers 103 and 104 are shown in the embossing cassette. 102 which is shown extracted from the embossing structure.This lower section also schematically illustrates the 1300 handlebar system together with an adjustment wheel 1301 configured to operate the 1300 handlebar system. Next, with reference to Figure 14, it represents the embossing cassette 102 of Figure 13, its lower section, upside down. In this position, the embossing cassette 102 can be conveniently positioned on a solid work surface (not shown in Figure 14), so that the adjustment wheel 1301 can be actuated by a user (not shown in Figure 14) and, consequently, the position of the axis of rotation of the second roller 104 relative to the first roller 103 (which remains in place) adjusted and corrected in the y direction. The embossing cassette 102 as a whole can be turned upside down again after adjustment and positioned in a removable manner in the embossing structure, while the new axis adjustment remains fixed.The exemplary system for adjustment in the y-direction, as described in this document, will allow maintaining an alignment tolerance within a range of 1 μm. Petition 870260036884, dated 04 / 20 / 2026, page 23 / 82 16 / 23 at 5 μm.

[0053] Next, returning to Figure 1, it further illustrates a preferred embodiment with an embossing structure 101 which also comprises a guide means 114 that is configured so as to guide the embossing cassette 102 during an insertion of the embossing cassette 102 into the embossing structure 101 so that the body positioning means cooperates with the embossing structure positioning means 109. The shock absorbers 118 mounted on the embossing structure 101 are configured so as to absorb a shock that may occur when the embossing cassette 102 is inserted into the embossing structure and reaches an end position within the embossing structure 101. This will substantially eliminate any risk of damage at the time of introduction of the embossing cassette 102 into the embossing structure 101, whether in the vertical and / or horizontal direction.

[0054] In addition, the optional hydraulic or pneumatic jacks 106 mounted within the embossing frame 101 are configured to adjust a back pressure between the first rollers 103 and 104. The optional hydraulic or pneumatic jack 106 acts on the pressure transmitter plate 116 which transfers the pressure through standard parts 117 to the adjustment means 112, 113. In specific cases where the embossing is not uniform along the width of the embossing rollers, the hydraulic or pneumatic jacks may be configured to produce a differential pressure between both ends of the rollers; however, this will be done without altering the average embossing pressure. The hydraulic or pneumatic jacks 106 can typically be configured to apply forces up to 2x15 kN.

[0055] As explained above, cover 108 is set to close opening 107 as soon as the embossing cassette 102 is Petition 870260036884, dated 04 / 20 / 2026, p. 24 / 82 17 / 23 fully incorporated into the embossing structure 101. The cover 108 may optionally be an integral part of the embossing cassette 102 or supplied separately from it.

[0056] Once the embossing cassette 102 is housed inside the embossing frame 101, the adjustment mechanisms for the rotation axes of the embossing rollers in the x, y, and z axes, for example, those described in the examples above, are hidden from the outside of the embossing frame 101, since the frame is configured to create an enclosure for the embossing cassette and more particularly for the adjustment mechanisms. Therefore, it becomes impossible to make or change any adjustments to the embossing rollers after the housing is complete. Any adjustments made to the embossing rollers must be done offline, i.e., while the embossing cassette 102 is removed from the embossing frame 101.This allows the manufacturer of the 102 embossing cassette to perform any embossing roller installation and corresponding adjustments in-house and supply a fully configured 102 embossing cassette for easy and quick installation on the 101 embossing frame, which can preferably be installed and remain on a customer's embossing production line. In this way, the customer will not need to intervene or worry about any roller adjustments on the embossing production line. This is particularly noteworthy given the potential complexity involved in adjusting embossing rollers, especially when the embossing rollers are relatively massive and heavy to handle.

[0057] Figure 3 illustrates a complete version of the embossing structure 101 as opposed to that in Figure 1, where it is only partially illustrated in order to better show the interior. In Figure 3, the embossing cassette 102 is introduced into the embossing structure 101 through the upper opening 107 in a vertical direction 301 and, through Petition 870260036884, dated 04 / 20 / 2026, p. 25 / 82 18 / 23 of a side opening 300 adjacent to the top opening 107, in a horizontal direction 302, possibly at the same time. In this example, the cover 108 is an integral part of the body 105 of the embossing cassette 102, and the embossing cassette 102 can be suspended by means of a hook 303 on the cover 108. Once the embossing cassette 102 is positioned inside the embossing frame 101, as illustrated in Figure 4, a door 400 can be removablely mounted on the embossing frame 101 in order to close the side opening 300. The door 400 may comprise an additional guide means 401, which, together with the guide means 114, will ensure secure positioning of the embossing cassette 102 inside the embossing frame 101.

[0058] Figure 5 illustrates an alternative way of introducing the embossing cassette 102 into the embossing frame 101, in which the side opening 300 is closed by the gate 400 before introduction. In this case, the guide means 114 and the additional guide means 401 guide the embossing cassette 102 during an insertion of the embossing cassette 102 into the embossing frame 101 along the vertical direction 301, in order for the body positioning means to cooperate with the embossing frame positioning means 109.

[0059] Next, returning to Figure 1, the guide medium 114 may comprise at least one inclined surface 115, which is configured so as to slide over an element equivalent to the embossing cassette 102 (this equivalent element not being visible in Figure 1, since it is located behind the embossing cassette 102 in the perspective view of the figure) during the insertion of the embossing cassette 102 into the embossing structure 101. Figure 5 also illustrates the inclined surface 115 and another inclined surface 500 of the additional guide medium 401, and makes it apparent that, in this exemplary illustration, the element equivalent to the embossing cassette 102 is simply a respective surface located in Petition 870260036884, dated 04 / 20 / 2026, page 26 / 82 19 / 23 embossing cassette 102. Using the guide means according to the present invention, it will be possible to obtain a comparatively high positioning accuracy with a tolerance of less than 0.05 mm for rollers with a length of about 1 m.

[0060] In Figure 5, the embossing frame 101 is mounted on an optional base 501, which may be part of an online production facility (the online production facility of which is not illustrated in Figure 5). The base 501 also carries a drive system 502 comprising a machine coupling configured to couple the drive system to the embossing cassette 102 as soon as it is inserted into the embossing frame 101, thus allowing at least one of the two rollers of the embossing cassette 102 to be driven.

[0061] Figure 6 illustrates the embossing structure 101, with the embossing cassette 102 inserted therein, mounted in a rack 600 which may be part of an online production facility. In this example, the drive system 502 is mounted on the embossing structure 101 and may be coupled to an external drive motor (not shown in Figure 6) which would enable the actuation of at least one of the two rollers on the embossing cassette 102.

[0062] According to an embodiment in which the embossing structure includes a servo motor, the coupling interface of the embossing system is nonspecific and may be used in arbitrary production lines.

[0063] According to a preferred embodiment, at least two rollers 103 and 104 each have a length between 100 mm and 5000 mm, but both have a similar length in order to fit together.

[0064] According to another preferred embodiment, at least the two rollers 103 and 104 are heated rollers. This embodiment is Petition 870260036884, dated 04 / 20 / 2026, p. 27 / 82 20 / 23 implemented in a manner well known in the art and is not illustrated in detail in the figures.

[0065] One advantage of the embossing system as described in this descriptive report is that the embossing cassette can be easily extracted from the embossing structure, despite the size and weight of at least two rollers. This will allow the embossing cassette to be changed in a comparatively short time and will limit production downtime in an online production facility. The entire process can be performed by a robot or specialized machinery and is illustrated in the flowchart in Figure 15. Thus, the embossing cassette 1500 can be extracted 1501 from both the front and top parts of the embossing structure, as readily illustrated and explained in the examples above. Although the embossing cassette can be simply replaced, it will also be possible to extract it for servicing on at least two rollers mounted on its body, for example, for adjusting the rollers of the embossing cassette.After isolation / extraction 1501 of the embossing cassette from the embossing structure in the online production line, the embossing cassette is in an offline status, i.e., it is not active in the online production line. At this point, the first and second rollers can be positioned 1502 in the embossing cassette. This refers to rollers that were already in use before the extraction of the embossing cassette, in which case the positioning may, in fact, be a repositioning, or new rollers arriving for replacement. In a subsequent step, the position of each of the rollers mounted on the body can be adjusted and corrected, by means of adjustment and correction 1503, in at least one of each end of the respective roller, from a position of a rotation axis in at least two of the following: in an axial direction, in at least one of the two dimensions of a plane perpendicular to the axial direction. This will be done by means of actuation. Petition 870260036884, dated 04 / 20 / 2026, page 28 / 82 21 / 23 of a plurality of means of adjustment and correction in at least one of each of the first and second embossing rollers. One objective of this process will be to obtain 1504 a perfect adjustment of the parallelism of the axes of rotation. Figure 2 illustrates the concepts of axial direction and the plane perpendicular to the axial direction.

[0066] According to a preferred embodiment, the embossing cassette is then housed within an embossing structure of the online production chain. In this way, the plurality of means of adjustment and correction is hidden with respect to the outside of the embossing structure.

[0067] Figure 7 illustrates an embodiment of the embossing system comprising the embossing frame 101 and the embossing cassette 102 mounted on the base 501, but in which the hydraulic jacks 106 are mounted outside the embossing frame 101 directly on the base 501 as well. The forces generated by the hydraulic or pneumatic jacks 106 can be transferred to the rollers by means of lever bars 700.

[0068] The 100 embossing system can be configured with sets of at least two rollers, which rollers can have different diameters.

[0069] The diameter of each of the at least two rollers can typically be in the range of 50 mm to 800 mm.

[0070] Figure 8 illustrates an exemplary embodiment with rollers of substantially the same diameter. In addition, Figure 8 shows the 800 toothed wheels mounted on the respective roller shafts and configured so as to couple the rollers to each other. The same diameter could be, for example, 130 mm.

[0071] Figure 9 illustrates another example with rollers of substantially the same diameter, but a diameter that is larger than that used in Figure 8. The same diameter could be, for example, Petition 870260036884, dated 04 / 20 / 2026, page 29 / 82 22 / 23 example, 180 mm.

[0072] Figure 10 illustrates another example with rollers of different diameters relative to each other, one having, for example, a diameter of 90 mm, and the other, a diameter of 180 mm.

[0073] The rollers can be curved in order to obtain a more uniform embossing of the structure(s) along the width of the rollers. This is well known in the art and will not be illustrated in detail in the figures.

[0074] In general, depending on the quality requirements of the embossing, the embossing rollers may be cylindrical, convex or concave.

[0075] The rollers may comprise stainless steel and be laser engraved on their surfaces with embossing structures. According to a preferred embodiment, the embossing rollers exhibit a corresponding synchronized structure design, such as, for example, a patrix / matrix configuration.

[0076] Stainless steel can be hardened throughout its volume or in a surface layer (< 0.5 mm). The resulting roll can be sandblasted and shot-hardened.

[0077] According to a preferred embodiment, embossing rollers may receive a hard coating or other surface treatment in order to increase their wear resistance. For example, embossing rollers may be provided with a wear-reducing coating obtained by PVD (physical vapor deposition).

[0078] Embossing rollers can be powder metallurgical or cast, with an initial hardness of 55 to 65 HRC, and can be laser engraved with laser sources with laser pulse wavelengths between 265 nm and 1065 nm and pulse durations between 0.2 ps and 20 ps.

[0079] Preferably, fine-tuning of the roller synchronization within the embossing cassette is performed and verified using a Petition 870260036884, dated 04 / 20 / 2026, p. 30 / 82 23 / 23 dedicated embossing unit, with the internal part not yet mounted on the embossing frame. Petition 870260036884, dated 20 / 04 / 2026, p. 31 / 82

Claims

1 / 2 CLAIMS 1. Embossing cassette comprising: - at least two rollers, - a body configured to hold the at least two rollers, the at least two rollers being removablely mounted in the body, - the embossing cassette being characterized in that it comprises: - a plurality of means for adjusting and correcting a position of a rotation axis of the corresponding roller inside the body, the location of each of the means for adjusting and correcting being at one end of the at least two rollers, and the plurality of means for adjusting and correcting being configured to adjust and correct in at least two of the following three directions: in an axial Z direction of the corresponding roller inside the body, in one of two X and Y directions defined by the two dimensions of a plane perpendicular to the axial direction, - the means for adjusting and correcting the axial Z direction comprising a disc notch adjustment mechanism,- the means for adjusting and correcting the X direction comprising an off-center pin, and - the means for adjusting and correcting the Y direction comprising a handlebar system and an adjustment wheel.

2. Embossing cassette, according to claim 1, characterized in that: - the plurality of means for adjusting and correcting is at least partially mounted on the body of the embossing cassette.

3. Embossing cassette, according to claim 2, characterized in that: - the at least two rollers have a length between 100 mm and 5000 mm.

4. Embossing cassette, according to any one of claims 1 to 3, characterized in that: - at least two rollers are configured for embossing a canvas material.

5. Embossing cassette, according to any one of claims 1 to 4, characterized in that: - at least two rollers are heated rollers. Petition 870260036884, dated 20 / 04 / 2026, p. 33 / 82

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