EP4150150A1 - Bespannung und herstellverfahren für eine solche bespannung - Google Patents
Bespannung und herstellverfahren für eine solche bespannungInfo
- Publication number
- EP4150150A1 EP4150150A1 EP21726571.9A EP21726571A EP4150150A1 EP 4150150 A1 EP4150150 A1 EP 4150150A1 EP 21726571 A EP21726571 A EP 21726571A EP 4150150 A1 EP4150150 A1 EP 4150150A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- longitudinal end
- section
- covering
- bent
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000000123 paper Substances 0.000 claims description 30
- 238000005452 bending Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 8
- 230000000295 complement effect Effects 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 description 9
- 239000004744 fabric Substances 0.000 description 8
- 239000011888 foil Substances 0.000 description 5
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000009958 sewing Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0063—Perforated sheets
Definitions
- the invention relates to a covering for a machine for the production and / or finishing of a material web, in particular a fibrous web, such as paper, cardboard or tissue web, the covering being designed as a belt with two longitudinal end sections on which the belt becomes an endless belt is closable or closed, wherein the band is formed from a perforated film, and wherein a portion of at least one of the two longitudinal end portions is bent over to form a channel provided for receiving a connecting element, the bent portion of the at least one longitudinal end portion in the area a fastening portion is fastened to the non-bent portion of the at least one longitudinal end portion, and wherein the bent portion, the non-bent portion and the fastening portion of the at least one longitudinal end portion are integrally formed with one another.
- the invention also relates to a manufacturing method for such a covering.
- a fiber suspension which mainly consists of water and has only a small proportion of fibers, is fed to an application unit, also known as a "headbox", of a paper machine.
- the rest of the paper machine then essentially only has the task of removing the water from the pulp suspension in order to produce the finished product, which can be refined if necessary.
- the fibrous web forming from the fibrous suspension runs through several sections in the paper machine, generally at least one forming section, one press section and one dryer section. Each section is usually assigned its own covering. These coverings are also known as sieves or felts.
- the clothing circulates endlessly in the respective sections of the paper machine and thus continuously transports the fibrous web through the paper machine. The coverings are exposed to a high level of wear and tear and must be replaced regularly.
- fabrics are predominantly used as coverings, whereby the term “fabric” is to be understood broadly and includes not only structures in which threads are interwoven in the narrower sense, but also structures in which threads are knitted or spiraled with one another, for example are connected. It is relevant that the finished "fabric” consists of individual threads. Since such fabrics are relatively expensive to manufacture, consideration has already been given to replacing them with perforated foils. For example, DE102010040089A1 discloses a covering in the form of a perforated film. The perforation is necessary to let the water through the fabric while retaining the fibers.
- the thickness is substantially twice that of the remainder of the film.
- the term “remaining film” is essentially to be understood as the area of the covering that lies between the two longitudinal end sections or outside a seam area. This increase in thickness in the seam area can lead to undesirable markings on the fibrous web transported on the covering.
- a covering is to be provided which can be easily introduced into a paper machine, which can be produced simply and inexpensively and which at the same time leads to no or all, if very slight, markings in the fibrous web.
- the covering according to the invention for a machine for the production and / or finishing of a material web, in particular a fibrous web such as paper, cardboard or tissue web, is designed as a belt with two longitudinal end sections on which the belt can be closed or closed to form an endless belt .
- the clothing is assigned a machine direction, which denotes the direction in which the clothing rotates when used as intended in the paper machine.
- the two longitudinal end sections designate sections at the two longitudinal ends of the clothing viewed in the machine direction. Once the clothing has been introduced into the paper machine, the two longitudinal end sections can be closed to form a seam, so that an endless belt is formed which can circulate in the respective section of the paper machine.
- the band is formed from a perforated film.
- This can in particular be a film as disclosed, for example, in DE102010040089A1 mentioned at the outset.
- film here means that there are no complex structures with free spaces between different layers, as shown, for example, in the publication WO2015 / 081417A1.
- the film is formed or consists of a laminate comprising several layers, the individual layers lying flat on top of one another and being connected to one another.
- the individual layers can be formed from different materials, in particular plastics.
- Such a laminate can be produced, for example, by a coextrusion process or by a lamination process.
- the tape preferably comprises only a single layer or it consists of a laminate with several layers of the same material, for example polyethylene terephthalate (PET), polyphenylene sulfide (PPS) or polyethylene naphthalate (PEN).
- PET polyethylene terephthalate
- PPS polyphenylene sulfide
- PEN polyethylene naphthalate
- the belt is perforated to allow drainage of the fibrous web.
- the perforations can have different shapes and dimensions. As a rule, they are relatively small in size, with diameters that are nowhere larger than 3 millimeters are.
- the perforations can be made in the tape in different ways.
- the perforations are preferably produced by punching.
- the thickness of the tape can be between 1.5 mm and 0.2 mm, for example.
- At least one of the two longitudinal end sections is bent over to form a channel provided for receiving a connecting element. Both longitudinal end sections are preferably bent over accordingly.
- the connecting element can be a pintle wire, for example.
- bent portion of the at least one longitudinal end portion is fastened in the region of a fastening portion to the non-bent portion of the at least one longitudinal end portion.
- the bent portion, the non-bent portion and the fastening portion of the at least one longitudinal end portion are formed in one piece with one another.
- the entire longitudinal end section is preferably formed in one piece.
- the aforementioned three sections can all or the entire longitudinal end section can be formed in one piece from the same film, the term “in one piece” not necessarily requiring that the film be monolithic; it can also be formed from a laminate comprising several layers, as described above.
- the bent section of the at least one longitudinal end section has a smaller material thickness than the rest of the film. This has the consequence that the seam area can be made thinner than in DE102017114964A1 and thus the risk of noticeable markings in the fibrous web transported on the covering is reduced.
- not only the bent but also the non-bent section of the at least one longitudinal end section has, at least in the area of the fastening section, a smaller material thickness than the rest of the film.
- the thickness of the seam can thus be further reduced precisely in the area in which the bent-over section is fastened onto the non-bent-over section.
- the material thickness of the bent section essentially corresponds to the difference between the material thickness of the non-bent section in the area of the fastening section and the material thickness of the remaining film. In this way, the thickness of the seam in the area in which the bent-over section is attached to the non-bent-over section can essentially correspond to the thickness of the remaining film. This also minimizes the risk of marking.
- the difference between the material thickness of the non-bent section in the area of the fastening section and the bent section corresponds to at least one thickness of the connecting element.
- the connecting element can be a flat wire, for example. In this way, the region of the seam in which the channel for the connecting element is formed can also have essentially the same thickness as the rest of the film.
- the at least one longitudinal end section has a plurality of projections and recesses, which are designed to come or be in toothed engagement with a plurality of projections and recesses of a complementarily designed mating section, the for The channel provided for receiving the connecting element is formed or is formed by the plurality of projections on the at least one longitudinal end section and on the mating section.
- a hinge-like connection point or seam can be produced.
- the connecting element is a pintle wire
- the two seam subregions can be pivoted around the connecting element in a hinge-like manner.
- the seam preferably extends substantially transversely to the machine direction, that is to say in the cross-machine direction.
- the mating section can also be designed differently than the at least one longitudinal end section, for example by a section initially produced separately from the rest of the band, which is then connected to the other of the two longitudinal end sections, it is preferred that both longitudinal end sections of the band are complementary but are otherwise essentially identical to one another, the two longitudinal end sections each having a plurality of projections and recesses which are suitable for interlocking or being in a toothed engagement, the channel provided for receiving the connecting element through the plurality of projections is formed on the two longitudinal end portions.
- the projections and the recesses preferably all have the same dimensions in the cross machine direction, it being possible for deviations to occur at the end edges in the cross machine direction.
- the width of the projections and / or recesses is preferably between 2 mm and 15 mm, more preferably about 3 mm.
- the band has a main section between the two longitudinal end sections and at least one of the two longitudinal end sections, preferably both longitudinal end sections, is or are integrally formed in one piece with the main section.
- “Integrally in one piece” is to be understood as meaning that the at least one longitudinal end section is also formed from this, preferably single-layer, solid material.
- a film can be produced by means of an extrusion process, the at least one longitudinal end section then being formed from the same film as the main section.
- the main section of the covering is free from seams.
- the main section extends with essentially the same properties from its one longitudinal end section to its other longitudinal end section.
- the main section is segmented and has at least one seam area which connects two segments to one another. This makes it possible to manufacture the covering in smaller individual parts. Before the clothing is drawn into the paper machine, the individual segments are preferably connected to one another until only the seam area, which is formed by the two longitudinal end sections of the belt, is open. Furthermore, the segmented construction of the covering allows only the damaged segment to be replaced in the event of a local defect in the covering.
- the aforementioned integrally one-piece design of the main section with at least one of the two longitudinal end sections relates to the segment of the main section which directly adjoins the corresponding longitudinal end section.
- the covering according to the invention can be produced particularly inexpensively.
- these rolls have a smaller width than the width of a typical paper machine clothing.
- the width of such rolls is a maximum of 2000mm, while large paper machines require clothing with a width of more than 6000mm.
- the segmented design makes it possible to use foils with a width of less than 2000 mm for the covering according to the invention. In doing so, strips are cut from the roll goods, the length of which essentially corresponds to the width of the covering to be produced from it.
- the individual strips or segments are connected to each other in the same way as the two longitudinal end sections of the covering are connected to each other according to the invention, in particular by means of a hinge-like connection, the respective seam areas leading to no or at least no noticeable markings in the paper web.
- a covering produced in this way could be compared to a curb chain, whereby However, unlike a curb chain, the segments of the covering are themselves flexible or pliable.
- This armored chain-like embodiment is particularly useful when the width of the finished covering is greater than the width of the strips or segments or armored chain links.
- the extrusion direction of the film used for the segments preferably runs essentially in the cross-machine direction of the clothing.
- At least two segments, preferably all segments, of the main section are designed to be essentially identical to one another.
- the at least one longitudinal end section has a plurality of recesses which extend partially in the bent section and partially in the non-bent section.
- the term “recess” is to be understood in the context of the present invention as a hole with a closed peripheral edge in the band.
- the recesses can have any shape that is suitable for producing a hinge-like toothing. However, it is particularly easy to manufacture and therefore preferred if the recesses are essentially rectangular.
- the recesses also preferably have dimensions that are many times larger than the dimensions of the pores in the band formed from a single-layer solid material or than the dimensions of the mesh spacings in the band formed as a fabric. In the test, it has been found to be particularly favorable if the dimensions of the essentially rectangular recesses in the cross machine direction are between 2 mm and 15 mm, preferably approximately 10 mm.
- it is possible to use the clothing according to the invention in different sections of the paper machine but it can be used particularly advantageously as a dryer fabric which is suitable for use in a dryer section of a paper, cardboard or tissue machine.
- the present invention also relates to a method for producing a covering, preferably a covering as described above, for a machine for producing and / or finishing a material web, in particular a fibrous web, such as, for example, a paper, cardboard or tissue web, comprising the following steps:
- the material is removed in such a way that the at least one longitudinal end section has at least one step. Steps can be produced relatively easily by milling and offer a flat surface for the connection of the bent and the non-bent section of the at least one longitudinal end section. More preferably, the material is removed in such a way that the at least one longitudinal end section has two steps.
- the bent section can have a smaller thickness than the non-bent section and this in turn can have a smaller thickness than the rest of the film.
- the method preferably before the step of bending, further comprises the following step:
- the bent section of the at least one longitudinal end section be materially attached to the non-bent section of the at least one longitudinal end section, preferably welded, in particular with the aid of an NIR laser.
- FIG. 1 shows two mutually complementary longitudinal end sections of a covering according to the invention, the longitudinal end sections not yet being bent over,
- FIG. 2 the ones shown in FIG. 1 which are designed to be complementary to one another
- FIG. 3 shows the longitudinal end sections shown in FIG. 2 as they are just being brought together to form a seam area
- FIG. 4 shows the longitudinal end sections shown in FIG. 2 as they become one
- FIGS. 6a, 6b show an enlarged view through the sectional plane A - A in FIG. 2 and additionally a connecting element according to a first variant of the invention
- FIGS. 7a, 7b show an enlarged view through the sectional plane A - A in FIG. 2 and additionally a connecting element according to a second variant of the invention
- FIGS. 8a, 8b show an enlarged view through the sectional plane AA in FIG. 2 and additionally a connecting element according to a third variant of the invention.
- FIG. 9 shows a further embodiment of the covering according to the invention, in which it is segmented and has a plurality of seam areas.
- FIG. 1 shows two complementary longitudinal end sections 12 of a covering 10 according to the invention for a paper machine, of which only one is provided with a reference number for the sake of clarity in FIG. 1.
- the covering 10 is designed as a band.
- a main section 14 of the belt is located between the two longitudinal end sections 12 arranged in the machine direction MD of the clothing 10 at opposite longitudinal ends.
- the two longitudinal end sections 12 are integrally formed in one piece with the main section 14.
- the covering 10 is not shown completely in FIGS. 1 to 4, but only an upper left corner and an upper right corner are shown.
- the main section 14 extends significantly further than shown in these figures.
- the clothing 10 also extends further in the cross-machine direction CD than is shown in these figures.
- the band is formed from a perforated film.
- the perforations are indicated in Figures 1 to 4 as fine points.
- the perforations have been made in the film by punching.
- the perforations can essentially have the geometric shape of a right circular cylinder.
- the film can be formed from just one plastic layer or from several plastic layers, which are preferably coextruded or glued or welded in a lamination process.
- a respective layer can consist of PET, PEN, PPS, PEEK, PI or polyolefins, for example.
- the finished covering 10 is not shown, but rather, strictly speaking, only a semi-finished product for producing the covering 10. This is due to the fact that the two longitudinal end sections 12 are not yet bent over in order to form a channel which is suitable for receiving a connecting element, in particular a plug wire for forming a seam.
- the longitudinal end section 12 extends in FIG. 1 in the machine direction MD from a longitudinal end edge 16 of the tape to an imaginary line 18 from which the main part 14 then seamlessly connects.
- Several recesses 20 are made in the longitudinal end section 12. In the present exemplary embodiment, these recesses 20 have an essentially square shape. However, this is not absolutely necessary. For example, the recesses 20 could also have an essentially rectangular, but not square, shape. In the present exemplary embodiment, all of the recesses 20 have the same shape.
- a web 22 is arranged between each two recesses that are directly adjacent in the cross machine direction CD. The recesses 20 and the webs 22 preferably have essentially the same dimensions in the cross-machine direction CD.
- the recesses 20 in one of the two longitudinal end sections 12 are offset in the cross machine direction CD in relation to the recesses 20 in the other of the two longitudinal end sections 12 of the belt that they do not overlap when viewed in the machine direction MD.
- two rows of holes 24 can be seen in FIG. 1 in each longitudinal end section 12. These two rows of holes are designed in such a way that the individual holes come to lie one above the other in pairs when the longitudinal end edge 16 on the imaginary line 18 which delimits the longitudinal end section 12, is turned over or bent over.
- a thread can then be passed through the holes in a simple manner in order to fasten the bent section 26 to the non-bent section 28 of the longitudinal end section 12, in particular sewing the two sections 26, 28 together.
- surface sections of the bent section 26 and of the non-bent section 28 come to lie directly on top of one another in a fastening section 30, as is shown in FIGS. 6a to 8b.
- the holes for the thread seam in the semi-finished product.
- these holes can also only be introduced into the longitudinal end section 12 after the bending over during the creation of the thread seam itself.
- the thread seam only represents one possibility of attaching the bent-over section 26 to the non-bent-over section 28.
- other methods can also be chosen. It is particularly preferred if the connection is made by welding, in particular NIR laser welding. In this way, a stable fastening is achieved, which is also particularly poor in marking compared to a thread seam. This means that when the covering 10 is used as intended, the fastening section 30 essentially leaves no marks in the fibrous web transported on the covering 10.
- a channel extending in the cross machine direction CD is formed which is suitable or suitable for receiving a connecting element 32, in particular a pintle wire . is provided.
- FIGS. the viewer is looking at the machine side of the covering 10, that is to say the side of the covering 10 which, in normal use, is the one on the covering 10 transporting fibrous web is turned away.
- the bent section 26 can be seen, but not the non-bent section 28 of the two longitudinal end sections 12.
- An imaginary bending line which separates the folded-over section 26 from the non-folded-over section 28, which remains essentially in the plane of the main section 14 when folded, runs through the plurality of recesses 20 and webs 22 in the respective longitudinal end section 12 During the bending process, a plurality of projections 34 and recesses 36 are formed on the respective longitudinal end section 12, as shown in FIG. A section through one of the projections 34 is shown in FIGS. 6a to 8b for three different exemplary embodiments, the connecting element 32 also being shown in these figures for illustration.
- the opposite longitudinal end sections 12 of the band are brought together. This is indicated in FIG. 3 by two arrows.
- the projections 34 and the recesses 36 of one longitudinal end section 12 come into toothed engagement with the projections 34 and recesses 36 of the other longitudinal end section 12, which are designed to be complementary thereto, as can be seen in FIG.
- the total amount of bent-over sections 26 and non-bent sections 28 or the total amount of projections 34 forms a continuous channel which extends essentially in the cross-machine direction CD.
- the connecting element 32 in particular a pintle wire, can be passed through this channel to form a closed seam region 38.
- FIGS. 6a and 6b show a first variant or embodiment of the covering 10 according to the invention. Only a section through the longitudinal end section 12 can be seen.
- the longitudinal end section 12 comprises two sections, namely a section 26 facing away from the rest of the film (left in FIG. 6a). and a section 28 facing the rest of the film (on the right in FIG. 6a).
- FIG. 6 a the longitudinal end section 12 is shown in a state in which the section 26 is not yet bent over and connected to the section 28.
- the finished state in which the bent section 26 is fastened to the non-bent section 28 in the area of the fastening section 30, can, however, be seen in FIG. 6b.
- the bending over and fastening creates a channel for the connecting element 32, which is preferably designed as a flat wire.
- the bent-over section 26 has a smaller material thickness than the rest of the film.
- the longitudinal end section 12 has been machined with a profile milling cutter so that it now has two steps.
- a first step 42 is arranged in the non-bent section 28.
- the non-bent section 28 has at its edge, with which it adjoins the bent section 26 (left in FIG. 6 a), essentially the same material thickness as the section 26.
- the first step 42 results in a step-like increase in the material thickness of the non-bent section 28, so that the non-bent section 28 in the area of the fastening section 30 (right in FIG. 3 a) has a material thickness corresponding to the height of the step.
- the height of the first step 42 preferably corresponds at least to the thickness of the connecting element 32.
- the non-bent section 28 has a second step 44 on its other edge, with which it adjoins the rest of the film (on the right in FIG. 6 a).
- the height of the second step 44 corresponds to the difference between the thickness of the remaining film and the thickness of the non-bent section 28 in the area of the fastening section 30.
- the height of the second step 44 corresponds preferably essentially the material thickness of the non-bent section 26.
- This advantageous embodiment enables a seam to be achieved (see FIG. 6b) which has essentially the same thickness everywhere as the rest of the film. There is thus no risk of markings on the fibrous web transported on the covering 10, which could be attributed to differences in thickness of the covering 10 in the seam area.
- FIGS. 7a and 7b show a second variant or embodiment of the covering 10 according to the invention.
- the same reference symbols are used for the same or analogous features.
- the longitudinal end section 12 in the second variant has only one step 42.
- the non-bent section 28 has essentially the same material thickness as the bent section 26 over its entire length. Only at its edge (on the right in FIG. 7a), with which it adjoins the rest of the film, does the material thickness increase in steps through the step 42 to the material thickness of the rest of the film.
- the material thickness of the bent-over section 26 preferably corresponds essentially to half of the material thickness of the remaining film.
- the seam Only in the area of the channel for the connecting element 32 in this variant does the seam have a thickness that is greater than the thickness of the rest of the film by at least the thickness of the fastening element 32.
- this material may thicken the seam - for example depending on the one to be produced Paper type - be harmless.
- the second embodiment has the advantages over the first embodiment that, on the one hand, the manufacturing effort is lower, since only one step instead of two steps has to be milled, and on the other hand, the material surrounding the channel has a greater thickness so that the seam is overall more stable will.
- FIGS. 8a and 8b show a third variant or embodiment of the covering 10 according to the invention.
- FIGS. 6a and 6b show a third variant or embodiment of the covering 10 according to the invention.
- the same reference symbols are used again for the same or analogous features.
- the longitudinal end section 12 of the third variant likewise has only a single step 42. This corresponds essentially to the first step 42 of the first variant, with the exception of the fact that the step height is greater.
- the material thickness of the non-bent section 28 in the area of the fastening section essentially corresponds to the material thickness of the remaining film.
- the third variant also has the advantage over the first variant that the manufacturing effort can be reduced, since only one step instead of two steps has to be milled.
- the seam has a greater material thickness than the rest of the film.
- the increase in thickness essentially corresponds to the material thickness of the bent section 26.
- Another advantage of the third variant compared to the first and second variant is that the seam in the area of the fastening section 30 is particularly stable due to the greater material thickness in this area.
- FIG. 9 schematically shows a further embodiment of a covering 10 'according to the invention.
- segments 40 are connected to one another via a seam region 38. Only a few segments 40 are shown in FIG. 7, but it is advantageous if the entire covering 10 'is formed from such segments 40, the segments 40 preferably being essentially identical to one another.
- the seam areas can be designed in exactly the same way as has been described in connection with the various embodiments according to FIGS. 6a to 8b.
- Each segment 40 can thus essentially correspond to the covering 10 according to the embodiments described above, with the difference that the main section 14 is shorter.
- the covering 10 'according to the further embodiment has a number of advantages over the embodiments described above.
- foils can be used for their production, which are relatively simple and therefore inexpensive to produce.
- the segmented design of the covering 10 'according to the invention allows foils with a width of less than 1300mm, preferably of about 1250mm or less, to be used for the tape, the dimensions of the individual segments 40 in the machine direction MD not exceeding the width of the foil webs.
- the dimension of the segments 40 in the machine direction MD can be approximately 1900 mm or less.
- the dimensions of the segments 40 in the cross-machine direction CD are not critical and can easily be matched to the width of the paper machine for whose use the clothing 10 'is intended, since the films are extruded in webs which in principle can be infinitely long.
- the clothing 10 ' generally has a dimension in the cross machine direction CD that is significantly larger than 2000 mm.
- the individual segments 40 preferably have a dimension in the machine direction MD that is significantly smaller than their dimension in the cross-machine direction CD.
- the extrusion direction of the film used for the segments 40 preferably runs essentially in the cross-machine direction CD of the clothing 10 '.
- a film with a dimension in the machine direction MD of less than 2000 mm can also be relatively easily transported and processed further.
- a system for making the perforations such as a punching system, can be manufactured and operated relatively easily.
- segmented design of the clothing 10 ' is that in the event of a local defect during production or operation of the clothing 10', the entire clothing does not have to be replaced, but it is sufficient to simply replace the affected segment 40.
- segmented design and coverings of different lengths can be put together very quickly from prefabricated segments.
- the clothing 10 of the embodiments according to Figures 1 to 8b, as well as the clothing 10 'of the further embodiment according to Figure 9 are preferably dryer fabrics, i.e. clothing that is suitable and intended for use in a dryer section of a paper machine.
Landscapes
- Package Frames And Binding Bands (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020113073.2A DE102020113073A1 (de) | 2020-05-14 | 2020-05-14 | Bespannung und Herstellverfahren für eine solche Bespannung |
PCT/EP2021/062132 WO2021228707A1 (de) | 2020-05-14 | 2021-05-07 | Bespannung und herstellverfahren für eine solche bespannung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4150150A1 true EP4150150A1 (de) | 2023-03-22 |
EP4150150B1 EP4150150B1 (de) | 2024-02-28 |
Family
ID=76011896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21726571.9A Active EP4150150B1 (de) | 2020-05-14 | 2021-05-07 | Bespannung und herstellverfahren für eine solche bespannung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4150150B1 (de) |
DE (1) | DE102020113073A1 (de) |
WO (1) | WO2021228707A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102022131354A1 (de) | 2022-11-28 | 2024-05-29 | Voith Patent Gmbh | Bespannung mit Spiralnaht und Herstellverfahren für selbige |
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DE102010040089A1 (de) | 2010-09-01 | 2012-03-01 | Voith Patent Gmbh | Gelochte Folienbespannung |
DE102013224684A1 (de) * | 2013-12-02 | 2015-06-03 | Voith Patent Gmbh | Transportband mit Verschlussnaht |
DE102013215779A1 (de) | 2013-08-09 | 2015-02-12 | Voith Patent Gmbh | Bespannung mit Nahtverbindungsmittel |
US9587351B2 (en) | 2013-12-06 | 2017-03-07 | Astenjohnson, Inc. | Non-woven double-layer industrial textile assembled from sleeve configuration panels, and panels therefor |
DE102017114964A1 (de) | 2017-07-05 | 2019-01-10 | Voith Patent Gmbh | Bespannung und Herstellverfahren für eine solche Bespannung |
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2020
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2021
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- 2021-05-07 EP EP21726571.9A patent/EP4150150B1/de active Active
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WO2021228707A1 (de) | 2021-11-18 |
EP4150150B1 (de) | 2024-02-28 |
DE102020113073A1 (de) | 2021-11-18 |
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