Ultrasonic sealing system and anvil block thereof

Abstract

The invention relates to an anvil (500) for an ultrasonic sealing system (300) for laterally sealing a tube (112) of packaging material. The anvil (500) comprises a ridge (508) extending in a transverse direction (TD) of the anvil (500), where the ridge (508) comprises: an intermediate section (504), and first and second peripheral sections (502, 506) disposed on either side of the intermediate section (504), where the first and second peripheral sections (502, 506) comprise respective first and second sub-portions (502b, 506b) and respective second sub-portions (502d, 506d), where the first and second sub-portions (502b, 506b, 502d, 506d) are arranged in the first and second sub-portions (502b, 506b, 502d, 506d). The respective first sub-portion (502b, 506b) is disposed between the intermediate section (504) and the respective second sub-portion (502d, 506d), and wherein the first sub-portion (502b, 506b) of the ridge (508) has a first height (h1), the second sub-portion (502d, 506d) of the ridge (508) has a second height (h2), and wherein the first height (h1) is different from the second height (h2).

Description

Technical Field

[0001] This invention relates to the field of packaging technology. More specifically, this invention relates to an ultrasonic sealing system and its anvil, and a method for lateral sealing of a tube of packaging material using said ultrasonic sealing system. Background Technology

[0002] Ultrasonic sealing technology, sometimes called ultrasonic welding, has been widely used in the food packaging industry for many years for sealing cardboard boxes. Ultrasonic sealing is achieved by applying pressure and introducing ultrasonic vibrations into the area to be sealed, generating heat. This is typically done by pressing the packaging material between a vibrating transducer and an anvil. The vibration generates heat in this area, which in turn causes the plastic of the packaging material to melt. The applied pressure fuses the packaging materials together, forming an airtight seal. The amount of heat generated depends on the magnitude of the applied pressure, the distribution of the applied pressure, and the amplitude of the vibration. To achieve the desired sealing effect, these parameters, as well as other parameters such as sealing time and sealing energy, need to be controlled.

[0003] Compared to inductive sealing (sometimes also called inductive heating), the advantage of ultrasonic sealing is that it does not require the addition of conductive materials, such as aluminum foil, to the packaging material. Therefore, this makes the packaging material more cost-effective and environmentally friendly.

[0004] In roll-to-roll packaging machines, ultrasonic sealing technology is typically used to create a transverse seal, which involves welding the lower part of a tube containing food packaging material to form the package. This tube is then sealed by connecting the two edges of the roll of packaging material with a longitudinal seal. Due to packaging design, the area to be sealed is not perfectly flat or asymmetrical. For example, there may be areas where the transverse and longitudinal seals intersect, resulting in a tube thickness of up to three layers.

[0005] The anvil design used to handle such deviations is crucial to the performance of the sealing system. Any defects in the lateral seal can seriously affect the food safety of the packaged product. Therefore, further improvements to the anvil design are needed to provide more consistent and reliable sealing performance. Summary of the Invention

[0006] The technology disclosed herein is intended to at least partially alleviate, mitigate, or eliminate one or more of the aforementioned defects and disadvantages in the prior art. Specifically, the object of the present invention is to provide an improved ultrasonic sealing system and its anvil. The inventive concept also relates to a packaging machine including the ultrasonic sealing system, and a method of operating the ultrasonic sealing system.

[0007] To improve the sealing performance of roll-to-roll packaging machines, the area on the anvil corresponding to the intersection of the transverse and longitudinal seals (TS-LS intersection) is typically adjusted in some way to compensate for variations in tube thickness, for example, by incorporating multiple teeth that create localized pressure and heat peaks within the packaging material. The anvil design then remains unchanged for the remainder of the tube width. However, the inventors have realized that sealing performance can also be improved in the peripheral section of the tube outside the TS-LS intersection. Therefore, the present invention provides an anvil that provides improved sealing performance across the entire width of the tube, particularly in the peripheral section outside the TS-LS intersection.

[0008] Various aspects and embodiments of the invention will be defined below, as well as in the appended independent and dependent claims.

[0009] According to a first aspect, an anvil is provided for an ultrasonic sealing system for laterally sealing a tube of packaging material. The anvil includes a ridge extending in a lateral direction TD. The ridge includes a central section. The ridge also includes a first peripheral section and a second peripheral section disposed on either side of the central section. The first and second peripheral sections each include a corresponding first sub-part and a corresponding second sub-part. The corresponding first sub-part is disposed between the central section and the corresponding second sub-part. The first sub-part of the ridge has a first height h1, and the second sub-part of the ridge has a second height h2. The first height h1 differs from the second height h2.

[0010] By dividing the first and second peripheral sections into corresponding first and second sub-sections with different heights, the different characteristics of these regions can be satisfied. In other words, improved sealing can be achieved by taking into account variations in packaging material in these regions. For example, during lateral sealing, the effects of longitudinal sealing of the tube can be addressed in an improved manner. This is closely related to the fact that higher ridges result in greater pressure, and therefore more heat is generated in that area. Thus, the anvil disclosed in this invention can treat different regions of the tube (e.g., TS-LS intersection areas, crease areas, or corner / edge areas of the tube) differently during the sealing process.

[0011] The improved anvil also offers the advantage of improving pressure and heating patterns across the entire tube. It can further enhance the robustness of areas with folds, flaps, and / or creases, as well as the tube edges.

[0012] Packaging materials may include a cardboard layer and a plastic foil attached to the cardboard layer. The cardboard layer has the beneficial effect of being compressible, while the plastic foil (also referred to herein as the plastic layer) can be melted by ultrasonic vibration to form a lateral seal. Therefore, the packaging material may be aluminum-free. Aluminum is typically used when the lateral seal is formed by an induction heating-based sealing system. Without an aluminum layer, the packaging material can be more economical, efficient, and environmentally friendly. Therefore, the indirect effect of the anvil and sealing system is that more environmentally friendly packaging can be achieved.

[0013] The first height h1 can be greater than the second height h2. In other words, the height of the ridge can be reduced on the outside of the first and second peripheral sections, respectively. The advantage of doing so is that it reduces heat generation on the outside of the tube (e.g., the edge of the tube). Due to the folding mechanism, the tube may be slightly thicker in this area. In other words, the rigidity of the packaging material causes the two sides of the packaging material to push against each other near the edge (where a U-fold is made). Therefore, reducing the height of the ridge in this area may be advantageous to avoid overheating or breakage of the packaging. Furthermore, areas with crease lines in the tube can also benefit from engaging with the anvil at a reduced height on the ridge.

[0014] The first and second peripheral sections may also include corresponding ends disposed at the respective distal ends of the anvil. The corresponding ends of the ridge may have a third height h3. The third height h3 may be equal to the first height h1 of the corresponding first sub-section of the ridge. The ends of the ridge may be used as reference points when calibrating the ultrasonic sealing system.

[0015] The difference between the first height h1 of the corresponding first sub-part of the spine and the second height h2 of the corresponding second sub-part of the spine can be set according to the structural characteristics of the packaging material.

[0016] By adapting packaging materials in this way, a more reliable lateral seal can be achieved compared to currently used methods that do not require different anvil designs to accommodate varying structural characteristics, such as thickness, stiffness, number of layers, and layer type.

[0017] The difference between the first height h1 of the corresponding first sub-section of the ridge and the second height h2 of the corresponding second sub-section of the ridge can be between 0.05 mm and 0.3 mm. More specifically, the difference can be 0.1 mm. Such a height difference can improve the sealing of the crease line and / or edges of the tube.

[0018] The corresponding second sub-part of the ridge can form an incision in the ridge. In other words, the second sub-part can form a groove or channel in the ridge.

[0019] The corresponding second sub-part of the spine may include a first incision and a second incision in the spine. The second height h2 of the second sub-part may be the height of the spine in the first and second incisions.

[0020] The first and second peripheral sections may also include corresponding first transition sections adjacent to the middle section. The combined transversal length of the first transition sections of the first and second peripheral sections may be greater than the transversal length of the middle section.

[0021] The lateral length of the corresponding first transition section can be defined by the dimensions of the package to be formed. Similarly, the lateral length of the intermediate section can be defined by the dimensions of the longitudinal seal.

[0022] At least one of the width, tilt angle, and offset relative to the intermediate section in the longitudinal direction of the anvil of the second sub-section of the ridge may differ from the width, tilt angle, and offset relative to the intermediate section in the longitudinal direction of the anvil of the first sub-section of the ridge.

[0023] Using different ridge designs in different subsections can further improve the sealing performance for variations in the pipe.

[0024] The corresponding second sub-section of the ridge can be configured to compensate for the longitudinal crease line and / or edge of the packaging material tube in a laterally sealed state. In other words, the second sub-section of the ridge can be positioned to engage with the crease line and / or edge of the tube in a laterally sealed state.

[0025] The first and second peripheral sections may further include corresponding second transition sections, which are disposed between corresponding first and second sub-parts of the first and second peripheral sections. The corresponding lateral length of the first transition section may be greater than the corresponding lateral length of the second transition section.

[0026] According to a second aspect, an ultrasonic sealing system is provided for laterally sealing a tube of packaging material. The ultrasonic sealing system includes an ultrasonic generator configured to transmit ultrasonic vibrations into the tube. The ultrasonic sealing system also includes an anvil as described in the first aspect. The anvil is positioned opposite the ultrasonic generator such that, in a laterally sealed state, the tube is positioned between the ultrasonic generator and the anvil.

[0027] The aforementioned features of the first aspect also apply to the second aspect where applicable. To avoid unnecessary repetition, please refer to the above.

[0028] According to a third aspect, a packaging machine is provided. The packaging machine includes a transverse sealing (TS) station for transversely sealing and cutting packaging material tubes into packages. The TS station includes an ultrasonic sealing system according to a second aspect.

[0029] The packaging machine may also include a PM reel receiver configured to receive PM reels. The PM reel can accommodate PM rolls of material. The PM reel receiver may be equipped with a PM reel ID reader configured to read PM reel identification ID tags on the PM reel. The TS sealing station may include an anvil ID reader configured to read anvil ID tags on the anvil. The packaging machine may also include a control unit containing a processor and memory, configured to receive PM reel ID data extracted from the PM reel ID tags. The control unit may also be configured to receive anvil ID data extracted from the anvil ID tags. The control circuitry may also be configured to compare the PM reel ID data with the anvil ID data to ensure that the anvil matches the packaging material supplied via the PM reel.

[0030] The features of the first and second aspects described above also apply to this third aspect where applicable. To avoid unnecessary repetition, please refer to the above.

[0031] According to a fourth aspect, a method is provided for execution in a packaging machine, the method comprising laterally sealing a tube of packaging material using an ultrasonic sealing system according to a second aspect. The packaging material includes a cardboard layer and a plastic foil attached to the cardboard layer. The method includes providing a laterally sealed section of the tube of packaging material between an ultrasonic generator and an anvil in the ultrasonic sealing system. The method further includes generating ultrasonic vibrations through the ultrasonic generator of the ultrasonic sealing system, causing at least partial melting of the plastic foil of the packaging material in the laterally sealed section. The method further includes pressing the tube in the laterally sealed section together between the ultrasonic generator and the anvil, thereby creating pressure on the laterally sealed section to adhere the plastic foil, thereby forming a laterally seal.

[0032] The method may further include reading the PM roll identification ID label on the PM roll in the packaging machine using a PM roll ID reader. The method may also include reading the anvil ID label on the anvil using an anvil ID reader. The method may further include comparing the anvil ID data extracted from the anvil ID label and the PM roll ID data extracted from the PM roll ID label in a control unit. If the anvil ID data and the PM roll ID data do not match, the method may further include sending a notification of anvil and PM mismatch.

[0033] The features described in the first, second, and third aspects above also apply to this fourth aspect when applicable. To avoid unnecessary repetition, please refer to the above content.

[0034] According to a fifth aspect, a computer program product is provided, which includes instructions that, when executed by a computer, cause the computer to perform the steps of the method according to a fourth aspect.

[0035] The features described in the first, second, third, and fourth aspects above also apply to this fifth aspect when applicable. To avoid unnecessary repetition, please refer to the above.

[0036] According to a sixth aspect, a non-transitory computer-readable storage medium is provided. This non-transitory computer-readable storage medium stores one or more programs configured to be executed by one or more processors of a processing system, said one or more programs containing instructions for performing the method according to a fourth aspect.

[0037] The features described in the first, second, third, fourth, and fifth aspects above also apply to the sixth aspect when applicable. To avoid unnecessary repetition, please refer to the above text.

[0038] The further scope of this disclosure will become apparent from the following detailed description. However, it should be understood that while the detailed description and specific examples illustrate some variations of the inventive concept, they are given by way of example only, as various changes and modifications within the scope of the inventive concept will become apparent to those skilled in the art based on this detailed description.

[0039] Therefore, it should be understood that the inventive concept is not limited to the specific steps of the method or components of the system, as such methods and systems may vary. It should also be understood that the terminology used herein is for describing particular embodiments only and is not intended to be limiting. It must be noted that, unless the context clearly specifies otherwise, the articles “a,” “an,” “the,” and “the” used in the specification and appended claims all indicate the presence of one or more elements. Thus, for example, “a device” or “the device” may include several devices, etc. Furthermore, the words “comprising,” “including,” and similar wording do not exclude other elements or steps. Attached Figure Description

[0040] The above and other aspects of the inventive concept will now be described in more detail with reference to the accompanying drawings, which illustrate variations of the inventive concept. These drawings should not be construed as limiting the invention to the specific variations; rather, they are used to explain and understand the inventive concept.

[0041] As shown in the figures, for illustrative purposes, the dimensions of each layer and region have been exaggerated to illustrate the overall structure of variations of the inventive concept. The same reference numerals in the figures denote the same elements throughout the text.

[0042] Figure 1 is a schematic diagram of a packaging machine.

[0043] Figure 2 shows the packaging after it has been sealed horizontally as an example.

[0044] Figure 3 shows the ultrasonic sealing system in a transverse sealing state in a cross-sectional view.

[0045] Figure 4A shows the packaging material tube in a side view.

[0046] Figure 4B shows a top view of the packaging material tube in cross-section.

[0047] Figures 4C to 4E show how the tube engages with anvils in three different examples.

[0048] Figure 5A shows a perspective view of the anvil as an example.

[0049] Figure 5B shows a front view of the cross-section of the anvil in Figure 5A.

[0050] Figures 5C to 5E show different cross-sections of the anvil in Figure 5A.

[0051] Figure 6 is a flowchart illustrating the steps of a method for laterally sealing a tube of packaging material. Detailed Implementation

[0052] The inventive concept will be described more fully below with reference to the accompanying drawings, which illustrate some variations of the inventive concept. However, the inventive concept can be implemented in many different forms and should not be construed as being limited to the variations described herein; rather, these variations are provided to fully and completely set forth the inventive concept and to fully convey its scope to those skilled in the art.

[0053] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It should be noted that, as used in the specification and the appended claims, the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements unless the context clearly specifies otherwise. Thus, for example, “a unit” or “the unit” may in some cases refer to more than one unit, etc. Furthermore, the words “comprising,” “including,” and “containing” do not exclude other elements or steps. It is important to emphasize that the term “comprising / including” as used herein is used to specify the presence of the stated feature, integer, step, or component. It does not exclude the presence or addition of one or more other features, integers, steps, components, or combinations thereof. The term “and / or” should be interpreted as an alternative meaning to “both” or “either.”

[0054] It should also be understood that although this document may use terms such as "first," "second," etc., to describe various elements or features, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the implementation scheme, a first perimeter segment may be referred to as a second perimeter segment, and similarly, a second perimeter segment may be referred to as a first perimeter segment. Both the first and second perimeter segments are perimeter segments, but they are not the same perimeter segment.

[0055] Anvil for an ultrasonic sealing system, an ultrasonic sealing system including the anvil, a packaging machine including the ultrasonic sealing system, and a method for laterally sealing a tube of packaging material using the ultrasonic sealing system will now be described with reference to Figures 1 to 6.

[0056] Figure 1 is an overall schematic diagram of the packaging machine 100. In its broadest form, the packaging machine 100 includes a transverse sealing station 114 for transversely sealing and cutting packaging material tubes 112 into packages 116. The packaging material may include cardboard layers and plastic foil. The plastic foil may be attached to the cardboard layers. The transverse sealing station 114 includes an ultrasonic sealing system 300, which will be further described below in conjunction with Figures 3 to 6. The packaging machine 100 may be a stand-alone packaging machine or part of a large food packaging or processing line.

[0057] In the example shown in Figure 1, packaging machine 100 is a roll-fed packaging machine, the basic principle of which will be described below. In this machine, packaging material is placed on a packaging material roll (or spool) 102 and fed into the spool receiver 118 of packaging machine 100. Packaging material roll 104 is formed from packaging material roll 102. Packaging material roll 104 can pass through sterilization station 106 to remove harmful microorganisms from roll 104 or reduce their number. Sterilization can be performed, for example, by a hydrogen peroxide bath, low-pressure electron beam (LVEB) equipment, or any other suitable equipment that complies with food safety regulations.

[0058] After sterilization, the roll 104 can be formed into a tube 112, for example, via a longitudinal sealing station 110. The tube 112 is formed by connecting the two edges of the roll 104 through a longitudinal seal LS. The term "longitudinal" as used herein refers to the longitudinal direction of the packaging material roll 104 or tube 112. Therefore, the longitudinal direction coincides with the feed direction FD in the packaging machine 100. Once the tube 112 is formed, food FP can be fed into the tube 112 through a product filling tube 108, which is at least partially arranged inside the tube 112.

[0059] The filled tube 112 then reaches the transverse sealing station 114, which includes the ultrasonic sealing system 300. The term "transverse" as used herein refers to the direction across the tube when flattened in the transverse sealing station 114 (i.e., the transverse direction TD). In the transverse sealing station 114, the ultrasonic sealing system 300 performs a transverse seal TS at the lower end of the tube 112. Typically, the ultrasonic sealing system 300 (described further below) has two main functions: 1) to perform a transverse seal by welding the two opposite sides of the tube 112 together, separating the product at the lower part of the tube 112 below the ultrasonic sealing system 300 from the product in the tube 112 above the ultrasonic sealing system 300; and 2) to cut off the lower part of the tube, forming the package 116. Alternatively, in addition to performing the transverse seal and cutting off the lower part in the same system 300 as shown, the step of cutting off the lower part can also be performed by different equipment in subsequent steps, or by the consumer if the package is intended to be sold in multiple units.

[0060] After the packaging 116 is formed, it can be folded at the folding station (not shown in the figure) to form the finished food packaging 116.

[0061] As shown, the reel receiver 118 may be equipped with a reel ID reader 122, which is configured to read the reel identification (ID) tag 120 on the reel 102. The reel ID tag 120 may contain information for identifying the reel. For example, the reel ID tag 120 may contain information indicating the type of packaging material on the reel 102, the material properties of the packaging material (e.g., thickness, material composition, etc.), the type of packaging to be formed from the packaging material, or the packaging machine settings to be used. In other words, the reel ID tag 102 may contain information about the structural characteristics of the packaging material. The lateral sealing station 114 may further include an anvil ID reader 124, which is configured to read the anvil ID tag 512 of the anvil used in the ultrasonic sealing system 300. The anvil ID tag 512 may contain information indicating which anvil is being used.

[0062] The packaging machine 100 may also include a control unit 126, which includes a processor 128 and a memory 130. The control unit 126 may be configured to receive PM reel ID data extracted from PM reel ID tag 120 and anvil ID data extracted from anvil ID tag 512. The control unit 126 may also be configured to compare the PM reel ID data with the anvil ID data to ensure that the anvil matches the packaging material supplied via reel 102. If a mismatch occurs, the control unit 126 may send a notification signal, for example, to the operator or control system of the packaging machine 100.

[0063] Figure 2 illustrates a package 116 that has been laterally sealed but has not yet been folded into a finished package. As shown, the package 116 is sealed within a laterally sealed section 200 that extends from the first edge 204a of the package 116 across the package to the second edge 204b.

[0064] Along the longitudinal direction LD, the packaging has multiple longitudinal crease lines 202a-c. Crease lines 202a-c should be understood as indentations or weakening lines. Crease lines 202a-c are typically embossed onto the packaging material during its manufacturing process. Crease lines 202a-c are designed to facilitate folding the packaging material into the desired shape. For example, as further explained below in conjunction with Figure 3, the packaging material tube 112 is formed into a desired shape (e.g., a shape with a rectangular cross-section) in a laterally sealed state. In this case, crease lines 202a-c can be positioned along the corners of the packaging to ensure accurate and consistent packaging forming. In the example shown, packaging 116 includes a first crease line 202a, a second crease line 202b, a third crease line 202c, and a fourth crease line (not shown) corresponding to the four corners of packaging 116. However, it should be understood that the number of crease lines can be two or more, depending on the type or shape of packaging 116.

[0065] As further illustrated herein, crease lines 202a-c also extend to the transverse sealing section 200 where a transverse seal is to be formed. Therefore, as the inventors realized, the transverse sealing effect can be further improved if the anvil is modified to take these factors into account. The tube 112 also includes a first edge 204a and a second edge 204b. Since the packaging material folds at edges 204a and 204b, the inventors realized that the transverse sealing effect can be further improved if the anvil is modified to take these areas into account.

[0066] Figure 3 is a cross-sectional view of the ultrasonic sealing system 300. More specifically, Figure 3 illustrates the general principle and process of the ultrasonic sealing system 300 in more detail by way of example. The process of operating the ultrasonic sealing system 300 to form a transverse seal will be further described below with reference to Figure 6.

[0067] The ultrasonic sealing system 300 is configured to seal the transverse sealing section 200 of the packaging material tube 112. The transverse sealing section 200 (which is further illustrated in conjunction with Figures 4A and 4B) includes a first transverse edge section 404, a longitudinal sealing section LS section 406, and a second transverse edge section 408.

[0068] The ultrasonic sealing system 300 includes an ultrasonic generator 304 and an anvil 500. These will be further described below in conjunction with Figures 5A to 5E. The ultrasonic sealing system 300 may include multiple pairs of ultrasonic generators 304 and anvils 500 arranged in the jaw system to form a lateral seal without interrupting the continuous movement of the tube 112.

[0069] An ultrasonic generator 304 is arranged to transmit ultrasonic vibrations to the transverse sealing section 200 of the tube 112. This may generate heat in the packaging material, causing at least partial melting of the plastic material in the transverse sealing section. An anvil 500 is positioned on the opposite side of the ultrasonic generator 304 to exert a reaction force on the ultrasonic generator 304. Therefore, in the transverse sealing state, the tube 112 is positioned between the ultrasonic generator 304 and the anvil 500. The pressure between the ultrasonic generator 304 and the anvil 500 fuses the packaging material together.

[0070] To make the forming process of the packaging 116 more controllable, the ultrasonic sealing system 300 may also include a so-called volume forming baffle (not shown). More specifically, the volume forming baffle can be used to controllably guide the tube 112, which has a circular cross-section, into a package with a rectangular cross-section.

[0071] In the process of switching to the ultrasonic sealing system 300, the tube 112 is preferably fed in from above, as this allows the product to remain inside the tube, as shown in Figure 1. In the first stage (sealing stage S), the ultrasonic generator 304 and the anvil 500 move relative to each other in opposite directions, causing the two opposite sides of the tube 112 to press against each other. It should be understood that either the ultrasonic generator or the anvil can be fixed, so that only the other moves.

[0072] To achieve a lateral seal, ultrasonic vibrations are generated by ultrasonic generator 304, thereby generating heat in the packaging material. This heat causes at least partial melting of the plastic layer of the packaging material (also referred to as plastic foil, polymer layer, or thermoplastic polymer layer), enabling this plastic layer to ensure that the two opposite sides of tube 112 can adhere to each other and remain together after the applied pressure is removed. In a subsequent step (referred to herein as cutting stage C), the lower portion of tube 112 can be cut off (e.g., using cutter 306) to form package 116. In this example, cutter 306 is disposed in an anvil 500. However, cutter 306 could also be disposed on the other side of tube 112, i.e., in ultrasonic generator 304. Alternatively, the cutting step can be performed by a separate device downstream of ultrasonic sealing system 300.

[0073] To increase the speed of packaging formation, during the sealing stage S and the cutting stage C, components of the ultrasonic sealing system (such as the ultrasonic generator 304, the anvil 500, and any other optional components) can move together with the tube 112 in the feed direction FD. Therefore, the ultrasonic generator 304 and anvil 500 shown in the sealing state S can be the same as those in the cutting state C.

[0074] Figure 4A shows a side view of the packaging material tube 112 in the stage of being pressed together to form a transverse seal TS. The term "side view" as used herein refers to the arrangement of the tube 112 in a vertical direction, as shown in Figure 3, for example. Therefore, it shows the outer surface of the tube 112. Figure 4B also shows the tube 112, but it is a cross-sectional view taken from above, i.e., section E-E'. It should be noted that the dimensions and proportions of the different sections and regions shown herein should primarily be considered as examples to illustrate the meaning of different sections and regions of the tube 112 and do not represent the actual packaging material tube 112. In particular, the features of the tube 112 have been exaggerated herein for ease of illustration.

[0075] As shown in the figure, after being flattened, the tube 112 can be divided into a first transverse edge section 404 and a second transverse edge section 408 (along the transverse direction TD of the tube). Between the first and second transverse edge sections 404 and 408, there is a longitudinal sealing section LS 406. These sections can extend longitudinally along the tube 112. The first and second transverse edge sections 404 and 408 can be regarded as two-layer thickness regions of the tube 112, that is, double-layer regions of the tube 112.

[0076] LS section 406 can be defined as the section of tube 112 whose thickness is affected by LS. In other words, LS section 406 can be considered as a three-layer region of tube 112. In the sub-section of LS section 406 (referred to herein as LS region 400), the packaging material tube 112 is three-layered when pressed together due to the manner in which the packaging material is folded to form LS. LS section 406 further extends to LS strip 414, which can be defined by LS strip region 416. The LS strip is applied during LS formation to provide a seal inside tube 112. The presence of the LS strip and the folding of the packaging material also affect the thickness of the tube in LS strip region 416, which must also be taken into account when forming TS.

[0077] In the longitudinal direction LD (perpendicular to TD), the transverse sealing section 200 can be defined as the area where the TS is to be formed. As shown herein, the TS section 200 can define the area on either side of a cut line 412, at which the tube 112 will be cut to form two separate packages. It should be noted that the TS formed in the TS section 200 does not necessarily cover the entire TS section 200. Rather, the TS section 200 should be understood as the area involved in the TS formation process, for example, meaning that it may come into contact with the ultrasonic generator 304 and / or the anvil 500 during the formation of the transverse seal.

[0078] On the cross section between TS segment 200 and LS segment 406, a TS-LS intersection 410 (or TS-LS overlapping area) is formed, which is represented by a diagonal line in this paper.

[0079] Figures 4A and 4B further show the first to fourth longitudinal crease lines 202a-d along the tube 112 on the first and second lateral edge sections 404, 406. As shown in Figure 4B, the crease lines on opposite sides of the tube 112, namely the first and third crease lines 202a and 202c, and the second and fourth crease lines 202b and 202d, are aligned with each other in the lateral direction. However, in practical applications, the position of the crease lines 202a-d may vary due to differences in packaging machines.

[0080] It should also be understood that although the thickness of the tube 112 shown herein at the first and second edges 204a, 204b is the same as that of the remainder of the first and second lateral edge sections 404, 408, the tube 112 may have a greater thickness in the area around the first and second edges 204a, 204b due to the U-shaped folds and rigidity of the packaging material.

[0081] Figures 4C to 4E illustrate how the tube 112 engages with the anvil 500 in a laterally sealed state. More specifically, Figures 4C to 4E show a cross-section of a top view (as shown in Figure 4B) of the tube 112 located near the anvil 500 according to the present invention. Figure 4C further shows a schematic diagram of the ultrasonic sealing device 304, illustrating how the tube 112 is positioned between the anvil 500 and the ultrasonic generator 304 in a laterally sealed state. It should be understood that the tube 112 can be configured such that the LS overlap faces the anvil 500, as shown in Figures 4C and 4E. However, the tube 112 can also be configured such that the LS overlap is away from the anvil 500, as shown in Figure 4D.

[0082] Figures 4C to 4E show three different examples of the anvil 500, which have different designs on the corresponding first and second peripheral sections 502, 506, which will be explained further below.

[0083] Typically, the anvil 500 includes a ridge 508 extending in the transverse direction of the anvil 500. The ridge 508 includes a central section 504 and first and second peripheral sections 502, 506 disposed on both sides of the central section 504. The central section 504 may be configured to engage at least a portion of the LS section 406 of the tube in a transversely sealed state. The first and second peripheral sections 502, 506 may be configured to engage at least a portion of the first and second transverse edge sections 404, 408 of the tube 112 in a transversely sealed state.

[0084] The first and second peripheral sections 502 and 506 each include corresponding first sub-parts 502b and 506b and corresponding second sub-parts 502d and 506d. The corresponding first sub-parts 502b and 506b are located between the corresponding second sub-parts 502d and 506d and the intermediate section 504. In other words, the corresponding second sub-parts 502d and 506d are positioned further away from the intermediate section 504 than the first sub-parts 502b and 506b.

[0085] Furthermore, the first sub-sections 502b and 506b of the ridge 508 have a first height, denoted by h1, and the second sub-sections 502d and 506d have a second height, denoted by h2. The first height h1 and the second height h2 are different from each other. Therefore, the first and second peripheral sections 502 and 506 of the ridge 508 have varying heights along the lateral length of the anvil. Therefore, in the laterally sealed state, the applied pressure (and the resulting heat) will vary on the first and second lateral edge sections 404 and 408 of the tube 112. In some embodiments, as shown in Figures 4C to 4E, the first height h1 may be greater than the second height h2.

[0086] The corresponding second sub-sections 502d and 506d of the ridge 508 can be configured to compensate for the longitudinal crease lines 202a-d and / or the edges 204a and 204b of the packaging material tube 112 in a laterally sealed state. This is shown in Figures 4C to 4E by the positioning of the tube 112 relative to the anvil 500, where the crease lines 202a-d and the first end 204a and the second end 204b are located in the corresponding second sub-sections 502d and 506d. Due to the undulation of the roll material in a laterally sealed state, the position of the tube 112 relative to the anvil 500 may vary. However, the intended position of the tube 112 allows the crease lines 202a-d to be located in the second transition sections 502c and 506c between the first and second sub-sections (which will be further explained below in conjunction with Figures 5A to 5E). The first edge 204a and the second edge 204b of the tube 112 can be located in the corresponding second sub-sections 502d and 506d.

[0087] The first and second sub-parts 502b, 506b, 502d, and 506d, with different heights, can be implemented in several different ways. Three different examples are shown in Figures 4C to 4E. However, it should be noted that the inventive concept is not limited to these three examples. Rather, they should be considered as multiple non-limiting examples. It should also be understood that the schematic diagrams in Figures 4C to 4E are for illustrative purposes only and should not be construed as limiting the scope of the invention. The dimensions shown do not necessarily represent actual measurements or configurations, but are provided as examples to aid in understanding the basic concept of the invention. Those skilled in the art will understand that various changes and modifications can be made to the dimensions and configurations shown without departing from the scope of the invention as defined in the claims.

[0088] As shown in Figure 4C, the second sub-parts 502d and 506d of the ridge can form a cut 514 (or groove) in the ridge 508. In other words, the ridge 508 on both sides of the second sub-parts 502d and 506d of the ridge 508 can have a greater height than the second sub-parts 502d and 506d of the ridge 508. For example, the first and second peripheral sections 502 and 506 can also include corresponding ends 502f and 506f disposed at the distal end of the anvil 500. In other words, the ends 502f and 506f can constitute the outermost portions of the corresponding first and second peripheral sections 502 and 506. The corresponding ends 502f and 506f of the ridge can have a third height, denoted herein as h3. The third height h3 can be equal to the first height h1 of the corresponding first sub-parts 502a and 506a of the ridge 508. However, the third height h3 can be different from the first height h1, but still greater than the second height h2.

[0089] As shown in Figure 4D, the second sub-parts 502d and 506d of the ridge 508 can extend all the way to the end of the anvil 500. In other words, the ridge 508 can have a constant height from the transition portion between the first sub-parts 502b and 506d and the second sub-parts 502d and 506d to the end of the anvil 500. In other words, the ends 502f and 506f of the anvil 500 can have the same height as the second sub-parts 502d and 506d of the ridge 508. This simplifies the manufacturing process.

[0090] As shown in Figure 4E, the corresponding second sub-parts 502d and 506d of the ridge 508 may include a first cut 514a and a second cut 514b in the ridge 508. The height of the ridge 508 in the first cut 514a is a second height h2. The height of the ridge 508 in the second cut 514b is a fourth height h4. The fourth height h4 may be equal to the second height h2. Therefore, the second height h2 of the second sub-parts 502d and 506d may be the height of the ridge 508 in the first cut 514a and the second cut 514b, as shown herein. However, it should be understood that the second height h2 in the first cut 514a may be different from the fourth height h4 in the second cut 514b. In the example of Figure 4E, the first cut 514a may be configured to compensate for the longitudinal crease line 202a-d. Therefore, the height of the ridge in the first cut 514a may be set to achieve an ideal seal of the tube 112 at the crease line 202a-d. The second cut 514b can be configured to compensate for the edges 204a, 204b of the tube. Therefore, the ridge height in the first cut 514a can be set to achieve an ideal seal at the edges 204a, 204b of the tube 112.

[0091] The anvil 500 according to the present invention will be further explained by the following examples, as shown in Figures 5A to 5E.

[0092] Figure 5A illustrates the anvil 500 by way of example in perspective. It should be understood that any features of the principles described above in conjunction with Figures 4C to 4E also apply to the anvil 500 described herein, and vice versa.

[0093] Figure 5A shows the anvil 500 in perspective view by way of example. The longitudinal direction LD and the transverse direction TD are shown here as reference points. LD and TD correspond to the same longitudinal and transverse directions as described above. Therefore, TD refers to the direction along which the transverse seal is formed, or in other words, the transverse direction of the pipes when they are sealed together (also known as welded together). Correspondingly, LD refers to the direction along which the longitudinal seal is formed, or in other words, the longitudinal direction of the pipes.

[0094] Figure 5B shows a front view of the cross section of the anvil 500, i.e., the surface facing the packaging material and the ultrasonic generator during the formation of the transverse seal. Figures 5C to 5E show three different cross sections of the anvil 500 (along lines A-A', B-B', and C-C') to illustrate the outline of the anvil 500.

[0095] It should be understood that the anvil 500 shown herein is configured to form a transverse seal on opposite sides of the cutting line separating two consecutive packages. Thus, the anvil 500 has two similar portions on opposite sides of the recess 516 for receiving the cutting blade. These two portions are thus configured to form a transverse seal in the respective packages of the two consecutive packages. Therefore, the anvil 500 can be symmetrical about a centerline, which is indicated herein by a dashed line located at the center of the recess 516. Therefore, for example, when it is stated that the anvil 500 includes a ridge 508, it should also be understood that the anvil can also include another ridge 508 located on the other side of the centerline, as shown herein. However, it is readily understood that the anvil 500 can also alternatively be configured to form only one transverse seal, i.e., the two portions of the anvil 500 can be separate elements. Therefore, the anvil 500 can include only one ridge. The anvil 500 will be described below primarily with reference to one of the described sections, but the same features and aspects also apply to the other section.

[0096] Referring to Figures 5A and 5B, the anvil includes a ridge 508. The ridge 508 extends in the transverse direction of the anvil 500. The ridge 508 should be understood as an elongated protrusion on the anvil 500. The function of this protrusion is to provide higher (or lower) pressure in a localized area when a transverse seal is formed. The purpose of doing so is to concentrate the pressure and the generated ultrasonic heat in the area surrounding the ridge 508. As shown in the figures, the ridge 508 can be divided into an intermediate section 504 and a first peripheral section 502 and a second peripheral section 506 disposed on both sides of the intermediate section 504. The intermediate section 504 is configured to be at least a portion of the longitudinal sealing section 406 facing the tube 112 during the transverse sealing state (as shown in Figure 4AE). Therefore, the transverse length of the intermediate section 504 can be set according to the size of the packaging material tube to be sealed. The first peripheral section 502 and the second peripheral section 506 are respectively arranged to be at least a portion of the first transverse edge section 404 and the second transverse edge section 408 facing the tube 112. The intermediate section 504 of the ridge is typically designed in a way that accommodates the difference in the number of packaging material layers present in the longitudinal sealing section of the tube 112 and the first and second lateral edge sections 404, 408. For example, the intermediate section 504 of the ridge 508 may have a smaller protrusion (i.e., a lower height of the ridge 508) compared to the first and second peripheral sections 502, 506, to compensate for the additional packaging material layers. In another example, as shown herein, the ridge 508 may include a plurality of teeth 514 arranged side by side in the transverse direction.

[0097] The first and second peripheral sections 502 and 506 include corresponding first sub-parts 502b and 506b adjacent to the intermediate section 504, and corresponding second sub-parts 502d and 506d adjacent to the first sub-parts 502b and 506b. In other words, the corresponding first sub-parts 502b and 506b are disposed between the intermediate section 504 and the corresponding second sub-parts 502d and 506d. As described above, the first sub-parts 502b and 506b of the ridge 508 have a first height h1, which is different from the second height h2 of the second sub-parts 502d and 506d of the ridge 508. In this example, the first height h1 is greater than the second height h2.

[0098] In the examples shown in Figures 5A to 5E, the second sub-parts 502d and 506d are implemented as cuts or grooves in the ridge, as described above in conjunction with Figure 4C. However, it will be readily apparent to those skilled in the art that other designs are also feasible, such as the concepts shown in Figures 4D and 4E.

[0099] In the illustrated example, the first and second peripheral sections 502, 506 also include corresponding ends 502f, 506f, which are disposed at the respective distal ends of the anvil 500. In other words, the corresponding ends 502f, 506f are adjacent to the second sub-parts 502d, 506d of the ridge 508. The corresponding ends 502f, 506f of the ridge have a third height h3. The third height h3 may be equal to the first height h1 of the corresponding first sub-parts 502a, 506a of the ridge 508, as described herein. However, the third height h3 may also be different from the first height h1. The ridge may transition from the second sub-parts 502d, 506d to the ends 502f, 506f via corresponding third transition sections 502e, 506e. The corresponding ends 502f, 506f may form part of the anvil 500, which the packaging material tube 112 will not contact during normal operation in a laterally sealed state. Therefore, ends 502f and 506f can be used as reference points when calibrating the ultrasonic sealing system. More specifically, ends 502f and 506f can be used as flat surfaces of the anvil 500, which have a clearly defined position relative to the ultrasonic generating device.

[0100] In the illustrated example, the first and second peripheral sections 502, 506 also include corresponding first transition sections 502a, 506a. The transition sections 502a, 506a are arranged at the ends of the corresponding first and second peripheral sections 502, 506, which are adjacent to the intermediate section 504. In other words, the first transition sections 502a, 506a provide a transition from the intermediate section 504 to the first sub-parts 502b, 506b of the ridge 508. The total lateral length of the first transition sections 502a, 506a of the first and second peripheral sections 502, 506 (i.e., the width in the lateral direction of the brackets indicating the first transition sections 502a, 506a) may be greater than the lateral length of the intermediate section 504.

[0101] As described above, the corresponding second sub-parts 502d and 506d of the ridge 508 are arranged to compensate for the longitudinal crease lines 202a-d and / or the edges of the packaging material tube 112 in a laterally sealed state. Therefore, the lateral lengths of the first and second sub-parts 502b, 506b, 502d, and 506d (or in other words, the ratios of the lateral lengths of the first and second sub-parts 502b, 506b, 502d, and 506d to the lateral lengths of the first and second peripheral sections 502 and 506, respectively) can be set such that the second sub-parts 502d and 506d are positioned at the intended locations of the crease lines and / or edges of the tube. In other words, the transition between the first and second sub-parts 502b and 502d in the first peripheral section 502 can be set based on the expected positions of the first and third longitudinal crease lines 202a and 202c as shown in FIG. 4B, such that the crease lines 202a and 202c and the first edge 204a engage with the second sub-part 502d of the ridge 508. Accordingly, the transition between the first and second sub-parts 506b and 506d in the second peripheral section 506 can be set based on the expected positions of the second and fourth longitudinal crease lines 202b and 202d, such that the crease lines 202b and 202d and the second edge 204b engage with the second sub-part 506d. Since the tube 112 fluctuates in the lateral sealing state, the positions of the crease lines 202a-d may be inaccurate. The gradual transition between the first and second sub-parts 502b, 506b, and 502d can mitigate this positional variation. Therefore, the first and second peripheral sections 502, 506 may further include corresponding second transition sections 502c, 506c disposed between the corresponding first sub-parts 502b, 506b and the corresponding second sub-parts 502d, 506d. The corresponding lateral lengths of the first transition sections 502a, 506b may be greater than the lateral lengths of the second transition sections 502c, 506c. Therefore, the transition between the intermediate section 504 and the first sub-parts 502b, 506b is smoother than the transition between the first sub-parts 502b, 506b and the second sub-parts 502d, 506d. Since the crease lines 202a-d extend relatively short in the lateral direction, the transition of the second transition sections 502c, 506c is relatively steep. Therefore, a more precise pressure distribution can be provided around this area.

[0102] Furthermore, the lateral lengths of the first and second sub-parts 502b, 506b, 502d, and 506d can be set according to the structural characteristics of the tube's packaging material. Structural characteristics may include, for example, the rigidity of the packaging material, its thickness, the number of material layers, the material type (e.g., parameters related to the material's heat capacity, viscosity, and mechanical strength), and the manufacturing method. If a multi-layered cardboard-based packaging material is used, the structural characteristics may also include the structural characteristics of each layer, such as thickness and material type. Additionally, structural characteristics may include the characteristics of crease lines, such as width and degree of compression. The anvil 500 may include an anvil ID tag 512. The anvil ID tag 512 can be used to identify the anvil 500 and associate it with a specific packaging material, for example, through its structural characteristics.

[0103] Turning now to Figures 5C through 5E, three cross-sections of the anvil 500 along lines A-A', B-B', and C-C' are shown. More specifically, the outline of the surface of the anvil 500 arranged facing the ultrasonic generator in a laterally sealed state is shown. Thus, Figure 5C shows the outline of the first sub-parts 502b and 506b of the ridge 508. Figure 5D shows the outline of the second sub-parts 502d and 506d of the ridge 508. Figure 5E shows the outline of the optional ends 502f and 506f of the ridge 508. The vertical dashed line indicates the centerline of the anvil 500 at the center of the groove 516.

[0104] As described above, the first sub-parts 502b and 506b of the spine 508 have a first height h1, while the second sub-parts 502d and 506d of the spine 508 have a second height h2, wherein the first height h1 is greater than the second height h2. In some embodiments, the difference between the first height h1 and the second height h2 may be between 0.05 and 0.3 mm. More preferably, the first height is 0.1 mm greater than the second height h2. However, it should be noted that the difference between the first height h1 and the second height h2 may be set according to the structural characteristics of the packaging material. For example, the above-mentioned measurements are preferred for packaging materials having at least an intermediate layer made of cardboard (or paperboard), a polymer inner layer (facing the product), and a polymer outer layer (facing the outside of the packaging) with a total thickness of 0.5 to 3 mm.

[0105] The anvil 500 conceived according to the present invention allows for variations in additional parameters of the ridge 508 across the first peripheral section 502 and the second peripheral section 506. For example, at least one of the width (i.e., the width of the anvil top 510 in the longitudinal direction), tilt angle, and offset (the offset relative to the intermediate section 504 along the longitudinal direction of the anvil 500) of the second sub-parts 502d and 506d of the ridge 508 may differ from the width, tilt angle, and offset of the first sub-parts 502b and 506b of the ridge 508. In this example, the first sub-parts 502b and 506b of the ridge 508 have a width w1 and a tilt angle a1. The second sub-parts 502d and 506d of the ridge 508 have a width w2 and a tilt angle a2. At the ends 502f and 506f, the ridge has a width w3, a tilt angle a3, and a height h3. The height of the ridge 508 is illustrated here with reference to a common reference point. It should be understood that the height of the ridge 508 can be defined relative to any suitable point on the anvil. As shown in Figures 5C to 5E, the tilt angle should be understood as the angle at which the side of the ridge 508 (i.e., the surface between the top 510 and the bottom of the ridge) tilts.

[0106] The heights, widths, and angles shown in the illustrations should be considered only as relative sizes in this example and not as limitations on the scope of the inventive concept. For example, as can be seen from Figures 5C to 5E, in this example, the width w1 of the first sub-parts 502b and 506b of the ridge 508 is smaller than the width w2 of the second sub-parts 502d and 506d. It should be understood that the numerical values ​​of the measurements may differ from those shown herein. For example, the exact measurements of the anvil 500 depend on the packaging material used and the dimensions of the package to be produced.

[0107] Figure 6 is a flowchart illustrating the steps of a method 600 for laterally sealing a packaging material tube 112 using the ultrasonic sealing system 300 described above. Method 600 is performed in a packaging machine 100, for example by a control unit 126 of the packaging machine 100. Method 600 can be considered as a method of operating the ultrasonic sealing system 300. The packaging material includes a cardboard layer and a plastic foil attached to the cardboard layer. The individual steps will be described in more detail below with reference to Figure 6. Although illustrated in a specific order, the steps of method 600 can be performed in any suitable order, in parallel, or multiple times. For example, steps S608 to S616 (discussed further below) can be performed before, during, or after steps S602 to S606.

[0108] Method 600 includes providing a transverse sealing section 200 of S602 packaging material tube 112 between an ultrasonic generator 304 and an anvil 500 in an ultrasonic sealing system 300.

[0109] Method 600 further includes generating ultrasonic vibration S604 by ultrasonic generator 304 of ultrasonic sealing system 300, causing at least partial melting of the plastic foil of packaging material in transverse sealing section 200.

[0110] Method 600 further includes pressing the tube 112 in the transverse sealing section 200 together between the ultrasonic generator 304 and the anvil 500 (S606) to create pressure on the transverse sealing section 200 to bond the plastic foil together, thereby forming a transverse seal.

[0111] It should be noted that the steps of generating ultrasonic vibration (S604) and pressing the tubes 112 together in the transverse sealing section (S606) can be performed simultaneously.

[0112] Method 600 may further include: reading (S608) the PM roll identification (ID) tag 120 on the PM roll 102 in the packaging machine 100 using the PM roll ID reader 122.

[0113] Method 600 may further include: reading (S610) the anvil ID tag 512 of the anvil 500 using an anvil ID reader 124.

[0114] Method 600 may further include comparing (S612) anvil ID data extracted from anvil ID tag 512 and PM reel ID data extracted from PM reel ID tag 120 in control unit 126.

[0115] Method 600 may further include: if the anvil ID data does not match the PM reel ID data, sending a notification of anvil and PM reel mismatch (S614). This notification signal may, for example, be transmitted to the control system of the packaging machine 100 or to the machine operator.

[0116] Method 600 may also include: stopping production of the S616 package if the anvil ID data does not match the PMID data.

[0117] It should also be understood that when this disclosure is described as a method, it can also be embodied in an apparatus or device comprising one or more processors and one or more memories coupled to the one or more processors, wherein computer code is loaded to implement the method. For example, the one or more memories may store one or more computer programs that, in some embodiments, when executed by the one or more processors, perform the steps, services, and functions of the methods disclosed herein.

[0118] Furthermore, those skilled in the art, when practicing the claimed invention, can understand and implement modifications to the disclosed variations by studying the accompanying drawings, this disclosure, and the appended claims.

Claims

1. An anvil (500) for an ultrasonic sealing system (300) for laterally sealing a tube (112) of packaging material, said anvil (500) comprising a ridge (508) extending in the lateral direction (TD) of said anvil (500), wherein, The ridge (508) includes: The middle section (504), and A first peripheral section and a second peripheral section (502, 506) are disposed on both sides of the intermediate section (504), wherein the first peripheral section and the second peripheral section (502, 506) include corresponding first sub-parts (502b, 506b) and corresponding second sub-parts (502d, 506d), wherein the corresponding first sub-parts (502b, 506b) are disposed between the intermediate section (504) and the corresponding second sub-parts (502d, 506d), and The first sub-parts (502b, 506b) of the ridge (508) have a first height (h1), and the second sub-parts (502d, 506d) of the ridge (508) have a second height (h2), wherein the first height (h1) is different from the second height (h2).

2. The anvil (500) according to claim 1, wherein, The first height (h1) is greater than the second height (h2).

3. The anvil (500) according to claim 1 or 2, wherein, The first peripheral section and the second peripheral section (502, 506) also include corresponding ends (502f, 506f) disposed at the respective distal ends of the anvil (500), and The corresponding ends (502f, 506f) of the ridge have a third height (h3), wherein the third height (h3) is equal to the first height (h1) of the corresponding first sub-parts (502a, 506a) of the ridge (508).

4. The anvil (500) according to any one of claims 1 to 3, wherein, The difference between the first height (h1) of the corresponding first sub-parts (502b, 506b) of the spine (508) and the second height (h2) of the corresponding second sub-parts (502d, 506d) of the spine (508) is set based on the structural characteristics of the packaging material.

5. The anvil (500) according to any one of claims 1 to 4, wherein, The difference between the first height (h1) of the corresponding first sub-part (502b, 506b) of the ridge (508) and the second height (h2) of the corresponding second sub-part (502d, 506d) of the ridge (508) is between 0.05 and 0.3 mm, preferably 0.1 mm.

6. The anvil (500) according to any one of claims 1 to 5, wherein, The corresponding second sub-parts (502d, 506d) of the ridge (508) form an incision (514) in the ridge (508).

7. The anvil (500) according to any one of claims 1 to 5, wherein, The corresponding second sub-parts (502d, 506d) of the ridge (508) include a first incision (514a) and a second incision (514b) located in the ridge (508), and wherein the second height (h2) of the second sub-parts (502d, 506d) is the height of the ridge (508) in the first incision (514a) and the second incision (514b).

8. The anvil (500) according to any one of claims 1 to 7, wherein, The first peripheral section and the second peripheral section (502, 506) also include corresponding first transition sections (502a, 506a) adjacent to the intermediate section (504). The total lateral length of the first transition section (502a, 506a) of the first peripheral section and the second peripheral section (502, 506) is greater than the lateral length of the middle section (504).

9. The anvil (500) according to any one of claims 1 to 8, wherein, The width, tilt angle, and offset relative to the intermediate section (504) of the second sub-parts (502d, 506d) of the spine (508) are different from at least one of the width, tilt angle, and offset relative to the intermediate section (504) of the first sub-parts (502b, 506b) of the spine (508) along the longitudinal direction of the anvil (500).

10. The anvil (500) according to any one of claims 1 to 9, wherein, The corresponding second sub-parts (502d, 506d) of the ridge (508) are arranged to compensate for the longitudinal crease lines (202a-d) of the packaging material tube (112) and / or the edges of the packaging material tube (112) in a transversely sealed state.

11. The anvil (500) according to any one of claims 1 to 10, wherein, The first peripheral section and the second peripheral section (502, 506) further include corresponding second transition sections (502c, 506c), which are disposed between the corresponding first sub-parts (502b, 506b) and the corresponding second sub-parts (502d, 506d) of the first peripheral section and the second peripheral section (502, 506). The corresponding lateral length of the first transition section (502a, 506a) is greater than the corresponding lateral length of the second transition section (502c, 506c).

12. An ultrasonic sealing system (300) for laterally sealing a tube (112) of packaging material, the ultrasonic sealing system (300) comprising: An ultrasonic generating device (304) is configured to transmit ultrasonic vibrations into the tube (112); as well as According to any one of claims 1 to 11, the anvil (500) is configured to be opposite the ultrasonic generator (304) such that, in a laterally sealed state, the tube (112) is disposed between the ultrasonic generator (304) and the anvil (500).

13. A packaging machine (100) comprising a transverse sealing (TS) station (114) for transversely sealing and cutting a tube (112) of packaging material into a package (116), wherein, The TS station (114) includes the ultrasonic sealing system (300) according to claim 12.

14. A method (600) for laterally sealing a tube (112) of packaging material using an ultrasonic sealing system (300) according to claim 12, performed in a packaging machine (100), wherein, The packaging material includes a cardboard layer and a plastic foil attached to the cardboard layer, and the method (600) includes: A transverse sealing section of the packaging material tube (112) is provided (S602) between the ultrasonic generating device (304) and the anvil (500) of the ultrasonic sealing system (300); Ultrasonic vibrations are generated (S604) by the ultrasonic generator (304) of the ultrasonic sealing system (300), causing at least partial melting of the plastic foil of the packaging material in the transverse sealing section; and In the transverse sealing section between the ultrasonic generator (304) and the anvil (500), the tube (112) is pressed together (S606) to create pressure on the transverse sealing section (302), causing the plastic foil to adhere and thus forming a transverse seal.

15. A computer program product comprising instructions which, when executed by a computer, cause the computer to perform the steps of the method (600) of claim 14.

Images