Industrial textile

Abstract

An industrial textile for use in a fibrous web forming and/or processing machine has a transversal edge section which can be joined together to render the textile endless. MD-yarns are interwoven with CD-yarns. At least two adjacent MD-yarns form a group, the MD-yarns of each MD-yarn group weaving side-by-side the same weave path with the CD-yarns. Each of the MD-yarn groups has adjacent first and second MD-yarns. The first MD-yarn of a MD-yarn group is non-adjacent the first MD-yarn of an adjacent MD-yarn group and the second MD-yarn of said MD-yarn group is non-adjacent the second MD-yarn of the adjacent MD-yarn group. At each transversal edge section the first MD-yarn of a first MD-yarn group forms a first loop and weaves back into the weave path of the first MD-yarn of a second MD-yarn group. The second MD-yarn group is adjacent the first MD-yarn group.

Claims

1. An industrial textile for use in a fibrous web forming and/or processing machine, the textile comprising: a fabric having a web contacting side and a machine contacting side and having a transversal edge section at two longitudinal ends thereof to be joined together to render the textile endless; said fabric being made of MD-yarns interwoven with CD-yarns, said MD-yarns having MD-yarn groups formed of at least two adjacent MD-yarns; said MD-yarns of each said MD-yarn group weaving side-by-side the same weave path with said CD-yarns; each of said MD-yarn groups including a first MD-yarn and a second MD-yarn arranged such that said first and second MD-yarn are adjacent each other; said first MD-yarn of an MD-yarn group being non-adjacent said first MD-yarn of an adjacent MD-yarn group and said second MD-yarn of said MD-yarn group being non-adjacent said second MD-yarn of said adjacent MD-yarn group; wherein, at each said transversal edge section, said first MD-yarn of a first MD-yarn group forms a first loop and weaves back into the weave path of said first MD-yarn of a second MD-yarn group, and said second MD-yarn group is adjacent said first MD-yarn group.

2. The industrial textile according to claim 1, wherein said second MD-yarn of said first MD-yarn group forms a second loop and weaves back into the weave path of said second MD-yarn of said second MD-yarn group.

3. The industrial textile according to claim 1, wherein at each transversal edge section said fabric includes a plurality first and second MD-yarn groups which are arranged such that, between two adjacent first MD-yarn groups a single second MD-yarn group is located and between two second adjacent MD-yarn groups a single first MD-yarn group is located.

4. The industrial textile according to claim 1, which comprises seam loops, some of said seam loops being arranged at a first said transversal edge section and some other of said seam loops being arranged at a second said transversal edge section, wherein, to render the industrial textile endless, said first and second transversal edge sections can be brought together whereupon said seam loops of said first and second transversal edge sections are interdigitated for forming a common channel through which a seam pintle can be pulled for joining the two transversal edge sections.

5. The industrial textile according to claim 1, wherein at least some of said first and/or second loops form seam loops.

6. The industrial textile according to claim 1, which comprises seam securing loops, some of which are arranged at a first said transversal edge section and some of which are arranged at a second said transversal edge section, said seam securing loops passing around said CD-yarn or CD-yarn group which is closest to the respective said transversal edge section to hold the CD-yarn or CD-yarn group in position.

7. The industrial textile according to claim 1, wherein at least some of said first and/or second loops form seam securing loops.

8. The industrial textile according to claim 1, wherein at each transversal edge section said first MD-yarn of a third MD-yarn group forms a third loop and weaves back into the weave path of said second MD-yarn of said third MD-yarn group or vice versa.

9. The industrial textile according to claim 8, wherein at least some of said third loops form seam securing loops.

10. The industrial textile according to claim 8, which comprises a seaming element at each said transversal edge section which can be joined, and to render the industrial textile endless the two transversal edge sections can be brought together, each of the seaming elements being held by at least some of said first and/or second and/or third loops.

11. The industrial textile according to claim 10, wherein each said seaming element comprises a spiral or a hook-array or a zipper extending along each said transversal edge section.

12. The industrial textile according to claim 1, wherein said fabric is flat woven.

13. The industrial textile according to claim 1, wherein said fabric is a single layer fabric.

14. The industrial textile according to claim 1, wherein said fabric has an air permeability of less than 135 cfm.

15. The industrial textile according to claim 1, wherein said fabric has an air permeability between 130 cfm to 55 cfm.

16. The industrial textile according to claim 1, wherein said fabric is a dryer fabric for use in a papermaking machine or a conveyor fabric for use in a spun-bond web or melt-blown web making machine.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) The invention will be further described by way of no limiting examples on the basis of schematic drawings. It shows

(2) FIG. 1 a top view onto a web contacting side of an industrial textile according to a first embodiment of the present invention,

(3) FIG. 2 two cross sectional views taken along the weave paths of MD-yarns forming adjacent loops,

(4) FIG. 3 a top view onto a web contacting side of an industrial textile according to a second embodiment of the present invention,

(5) FIG. 4 two cross sectional views taken along the weave paths of MD-yarns forming adjacent loops,

(6) FIG. 5 a top view onto a web contacting side of an industrial textile according to a third embodiment of the present invention,

(7) FIG. 6 three cross sectional views taken along the weave paths of MD-yarns forming adjacent loops,

(8) FIG. 7 a top view onto a web contacting side of an industrial textile according to a forth embodiment of the present invention,

(9) FIG. 8 five cross sectional views taken along the weave paths of MD-yarns forming adjacent loops,

(10) FIG. 9 a top view onto a web contacting side of an industrial textile according to a fifth embodiment of the present invention and

(11) FIG. 10 a top view onto a web contacting side of an industrial textile according to a sixth embodiment of the present invention,

DESCRIPTION OF THE INVENTION

(12) For all the embodiments shown in FIGS. 1 to 10 the industrial textile 100 mainly consists of a fabric 103. Mainly means in this regard that the industrial textile does not have any additional layers in addition to the woven fabric like batt or film layers. The fabric can have at its lengthwise edges edge sealing coatings or the like and at its transversal edge sections seaming elements in addition to seam loops formed by the MD-yarns which are part of the woven fabric structure.

(13) The fabrics shown in the following embodiments can be flat woven and are of a single layer construction, that means with no two different MD-yarn layers and/or no two different CD-yarn layers.

(14) The body of the fabrics shown can have an air permeability of less than 135 cfm, preferably of between 130 cfm to 55 cfm.

(15) If MD-yarns are grouped they can have a circular as well as a flat cross section.

(16) If the CD-yarns are grouped they preferably have a circular cross section. If the CD-yarns are flat they are preferably not arranged in CD-yarn groups.

(17) FIG. 1 shows a top view onto a web contacting side of an industrial textile 100 according to a first embodiment of the present invention. FIG. 2 shows the industrial textile 1 of FIG. 1 along two cross sectional views taken along the weave paths of first MD-yarns 2 and 4 as well as second MD-yarns 1 and 3.

(18) The industrial textile 100 has the web contacting side 102 and a opposite machine contacting side. The industrial textile 100 further has at each of its two longitudinal ends a transversal edge section 101. One of these transversal end sections is shown in current FIGS. 1 and 2.

(19) The textile 100 comprises a fabric 103 made from MD-yarns 1 to 28 interwoven with CD-yarns 1s to 10s. As can be seen, the MD-yarns 1 to 28 are arranged in groups of two adjacent MD-yarns (MD-yarn group). The MD-yarns of each MD-yarn group weave side-by-side the same weave path with the CD-yarns 1s to 10s. For example MD-yarns 1, 2 form a MD-yarn group and MD-yarns 3, 4 form another MD-yarn group. Further on CD-yarns are arranged in groups of two adjacent CD-yarns weaving side-by-side the same weave path with the MD-yarns 1 to 28. For example CD-yarns 1s, 2s form a CD-yarn group and CD-yarns 3s, 4s form another CD-yarn group.

(20) Each of the MD-yarn groups comprises a first MD-yarn 2, 4, 6, 8, 10, . . . 28 (even numbered MD-yarns) and a second MD-yarn 1, 3, 5, 7, . . . 27 (odd numbered MD-yarns) which are arranged such that

(21) i) the first and second MD-yarn of a group are adjacent to each other and

(22) ii) the first MD-yarn of said MD-yarn group is non-adjacent to the first MD-yarn of an adjacent MD-yarn group and

(23) iii) the second MD-yarn of said MD-yarn group is non-adjacent to the second MD-yarn of said adjacent MD-yarn group.

(24) By way of example the first MD-yarn 8 of a MD-yarn group is adjacent to the second MD-yarn 7 of said MD-yarn group. The first MD-yarn 8 of said MD-yarn group is non-adjacent to the first MD-yarn 6 of an adjacent MD-yarn group and the second MD-yarn 7 of said MD-yarn group is non-adjacent to the second MD-yarn 5 of said adjacent MD-yarn group.

(25) As can be seen, at each transversal edge section 101 the first and second MD-yarns are grouped in first MD-yarn groups 1g1 to 1g7 and second MD-yarn groups 2g1 to 2g7. By way of example: the first MD-yarn 4 and the second MD-yarn 3 form a first MD-yarn group 1g1, whereas the first MD-yarn 2 and the second MD-yarn 1 form a second MD-yarn group 2g1. The first and second MD-yarn groups 1g1 to 1g7, 2g to 2g7 are arranged such that, between two adjacent first MD-yarn groups 1g a single second MD-yarn group 2g is located and between two second adjacent MD-yarn groups 2g a single first MD-yarn group 1g is located.

(26) For the first and second MD-yarn groups 1g1 to 1g7, 2g1 to 2g7 it can be seen that the first MD-yarns of the first MD-yarn groups 1g form first loops 1l1 to 1l7 and weave back into the weave path of the first MD-yarn of an adjacent second MD-yarn group 2g. Further on the second MD-yarn of the respective first MD-yarn groups forms a second loop 2l1 to 2l7 and weaves back into the weave path of the second MD-yarn of the adjacent second MD-yarn group 2g1 to 2g7. E.g. first MD-yarn 4 of first MD-yarn group 1g1 forms a first loop 1l1 and weaves back into the weave path of the first MD-yarn 2 of the adjacent second MD-yarn group 2g1 by weaving with CD-yarn 7s to 10s after forming the first loops 1l1 and returning back into the fabric 103. At position A the back weaving of first MD-yarn 4 of first MD-yarn group 1g1 ends and first MD-yarn 2 of second MD-yarn group 2g1 takes over.

(27) Second MD-yarn 3 of the first MD-yarn group 1g1 forms a second loop 211 and weaves back into the weave path of the second MD-yarn 1 of the adjacent second MD-yarn group 2g1 by weaving with CD-yarn 7s to 10s after forming the second loop 211 and returning back into the fabric 103. At position B the back weaving of second MD-yarn 3 of first MD-yarn group 1g1 ends and second MD-yarn 1 of second MD-yarn group 2g1 takes over.

(28) The first loops 1l1 to 1l7 form seam loops and the second loops 2l1 to 2l7 form seam securing loops.

(29) To make the industrial textile 100 endless the seam loops arranged at each of the two transversal edge sections 101 can be brought together and interdigitated to form a common channel through which a seam pintle can be pulled for joining the two transversal edge sections 101. The seam securing loops pass around the CD-yarn group 9s, 10s which is closest to the respective transversal edge section 101 to hold this CD-yarn group 9s, 10s in position. The sequence of loop arrangements as shown in FIG. 2 is repeated several times to build up the seam at each transversal edge section.

(30) FIG. 3 shows a top view onto a web contacting side of an industrial textile 100 according to a second embodiment of the present invention. FIG. 4 shows the industrial textile 100 of FIG. 3 along two cross sectional views taken along the weave paths of first MD-yarns 2 and 4 as well as second MD-yarns 1 and 3.

(31) In the following only the differences to the embodiment shown in FIGS. 1 and 2 will be discussed.

(32) As can be seen the industrial textile 100 comprises at each transversal edge section 101, from which only one transversal edge section 101 is visible, a seaming element in the shape of a spiral 104. To make the industrial textile 100 endless, the two transversal edge sections can be brought together and the two spirals can be interdigitated to form a common channel through which a seam pintle can be pulled. As can be seen the spiral 104 is hold by the first loops 111 to 117 and by the second loops 211 to 217. The sequence of loop arrangements as shown in FIG. 4 is repeated several times to build up the seam at each transversal edge section.

(33) FIG. 5 shows a top view onto a web contacting side of an industrial textile 100 according to a third embodiment of the present invention. FIG. 6 shows the industrial textile 100 of FIG. 5 along three cross sectional views taken along the weave paths of first MD-yarns 2 and 4, second MD-yarns 1 and 3 as well as third MD-yarns 5 and 6.

(34) In the following only the differences to the embodiment shown in FIGS. 1 and 2 will be discussed.

(35) As can be seen the transversal edge section 101 comprises further to the first and second MD-yarn groups 1g1 to 1g5, 2g1 to 2g5 third MD-yarn groups 3g1 to 3g5. At each of the third MD-yarn groups 3g1 to 3g5 the first MD-yarn of the respective third MD-yarn group forms a third loop 3l1 to 3l5 and weaves back into the weave path of the second MD-yarn of this third MD-yarn group. E.g. first MD-yarn 6 of the third MD-yarn group 3g1 forms a third loop 3l1 and weaves back into the weave path of the second MD-yarn 5 of this third MD-yarn group 3g1. At each transversal edge section 101 from which only one is visible in FIGS. 5 and 6, the fabric 103 provides a plurality of first and second and third MD-yarn groups 1g1 to 1g5, 2g1 to 2g5 which are arranged such that, adjacently arranged first and second MD-yarn groups form pairs of MD-yarn groups 1pg to 5pg, wherein between two adjacent pairs of MD-yarn groups 1pg to 5pg a single third MD-yarn group 3g1 to 3g5 is located. The sequence of the neighboring MD-yarn groups in this case can be such that adjacently to the third MD-yarn group 3g1 to 3g5 a first MD-yarn group 1g1 to 1g5 is located and adjacently to said first MD-yarn group 1g1 to 1g5 a second MD-yarn group 2g1 to 2g5 is located. This sequence is repeated several times at each transversal edge section 101. E.g. the sequence of the neighboring MD-yarn groups is such that adjacently to the third MD-yarn group 3g1 the first MD-yarn group 1g1 is located and adjacently to said first MD-yarn group 1g1 the second MD-yarn group 2g1 is located.

(36) As can be seen the first loops 1l1 to 1l5 and the second loops 2l1 to 2l5 form seam loops, whereas the third loops 3l1 to 3l5 form seam securing loops. The sequence of loop arrangements as shown in FIG. 6 is repeated several times to build up the seam at each transversal edge section.

(37) FIG. 7 shows a top view onto a web contacting side of an industrial textile 100 according to a forth embodiment of the present invention. FIG. 8 shows the industrial textile 100 of FIG. 7 along five cross sectional views taken along the weave paths of first MD-yarns 2 and 4 as well as 6 and 8 and second MD-yarns 1 and 3 as well as 5 and 7.

(38) In the following only the differences to the embodiment shown in FIGS. 1 and 2 will be discussed.

(39) In the embodiment shown in FIGS. 7 and 8 the first loops 1l1, 1l2, 1l4 1l5 and 1l7 as well as the second loops 2l1, 2l3, 2l4, 2l6 and 2l7 form seam loops, whereas the first loops 1l3, 1l6 and the second loops 2l2, 2l5 form seam securing loops. The sequence of loop arrangements as shown in FIG. 8 is repeated several times to build up the seam at each transversal edge section.

(40) FIG. 9 shows a top view onto a web contacting side of an industrial textile 100 according to a fifth embodiment of the present invention.

(41) In the following only the differences to the embodiment shown in FIGS. 1 and 2 will be discussed. As can be seen each CD-yarn group consists of three CD-yarns weaving side-by-side the same weave path with the MD-yarns 1 to 28. By way of example a first CD-yarn group consists of CD-yarns 1s to 3s.

(42) FIG. 10 shows a top view onto a web contacting side of an industrial textile 100 according to a fifth embodiment of the present invention.

(43) In the following only the differences to the embodiment shown in FIGS. 1 and 2 will be discussed. As can be seen the CD-yarns 1s to 5s are not grouped. The CD-yarns 1s to 5s have a float cross section with a bimodal or elliptical or rectangular cross section and can have a width to height aspect ratio from between 1.7:1 to 4:1.