Woven wire with flat warp threads

Patent metadata

Field	Value
Publication number	US-9359722-B2
Application number	US-201414195097-A
Country	US
Kind code	B2
Filing date	Mar 3, 2014
Priority date	Mar 1, 2013
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A woven wire for use in a paper, cardboard, or tissue manufacturing machine, has a first fabric layer providing a web-contact side and a second fabric layer providing a machine-contact side. The layers have machine-direction threads, cross-direction threads, and binder threads. A first fabric layer has a weaving pattern of interwoven first MD threads, first CD threads and binder threads. The second fabric layer has a weaving pattern of interwoven second MD threads and second CD threads. The first and second fabric layers are interconnected by binder threads. The binder threads are interwoven with MD threads and/or CD threads of the first and of the second fabric layers. The first MD threads, the first CD threads and the binder threads have a circular cross-sectional face. At least some or all second MD threads have a cross-sectional face with a flattened shape different from a circular shape.

First claim

The invention claimed is:

1. A woven wire for use in a machine manufacturing and/or processing a fibrous web, the woven wire comprising:
a first fabric layer providing a web-contact side and a second fabric layer providing a machine-contact side;
said first and second fabric layers being disposed above one another and having first machine direction threads, first cross-direction threads, second MD threads, second CD threads and binder threads;
said first fabric layer having a weaving pattern formed by interweaving said first MD threads, said first CD threads and said binder threads;
said second fabric layer having a weaving pattern formed by interweaving said second MD threads with said second CD threads;
said first and second fabric layers being interconnected by binder threads, with said binder threads interwoven with MD threads and/or CD threads of said first and second fabric layers;
said first MD threads, said first CD threads, and said binder threads having a circular cross section;
said second MD threads having a cross-section with a flattened shape deviating from said circular cross section; and
said second MD threads running along a majority of a weaving path thereof on a side of said second fabric layer facing toward the machine to provide a majority of the machine-contact side, and said second CD threads running along a majority of a weaving path thereof in an interior of the wire.

2. The woven wire according to claim 1 , wherein said second MD threads have a cross-section with a flattened shape different from a circular shape.

3. The woven wire according to claim 1 , wherein the shape of the cross-sectional face of said second MD threads is a shape selected from the group consisting of rectangular, bone-shaped, and elliptic.

4. The woven wire according to claim 1 , wherein the shape of the cross-sectional face of said second MD threads has an aspect ratio of a height to width between 1:1.15 and 1:1.75.

5. The woven wire according to claim 1 , wherein a ratio of a number of first MD threads to second MD threads is greater than 1.

6. The woven wire according to claim 5 , wherein the ratio of the number of first MD threads to second MD threads is not an integer.

7. The woven wire according to claim 1 , wherein a ratio of a number of first CD threads to second CD threads is greater than 1.

8. The woven wire according to claim 1 , wherein the ratio of the number of first CD threads to second CD threads is not an integer.

9. The woven wire according to claim 1 , wherein the machine-contact side is substantially provided by the second CD threads.

10. The woven wire according to claim 9 , wherein a ratio of a diameter of said second CD threads to a height of said second MD threads is greater than 1.

11. The woven wire according to claim 10 , wherein the ratio of the diameter of said second CD threads to the height of said second MD threads lies within a range of 1.5 to 3.0.

12. The woven wire according to claim 10 , wherein the ratio of the diameter of said second CD threads to the height of said second MD threads lies within a range of 1.6 to 2.5.

13. A woven wire for use in a machine manufacturing and/or processing a fibrous web, the woven wire comprising:
a first fabric layer providing a web-contact side and a second fabric layer providing a machine-contact side;
said first and second fabric layers being disposed above one another and having first machine direction threads, first cross-direction threads, second MD threads, second CD threads and binder threads;
said first fabric layer having a weaving pattern formed by interweaving said first MD threads, said first CD threads and said binder threads;
said second fabric layer having a weaving pattern formed by interweaving said second MD threads with said second CD threads;
said first and second fabric layers being interconnected by binder threads, with said binder threads interwoven with MD threads and/or CD threads of said first and second fabric layers;
said first MD threads, said first CD threads, and said binder threads having a circular cross section;
said second MD threads having a cross-section with a flattened shape deviating from said circular cross section;
the machine-contact side being substantially provided by said second CD threads; and
said second MD threads extending substantially on a side of said second fabric layer facing toward said first fabric layer.

14. The woven wire according to claim 9 , wherein said second CD threads on a side of said second fabric layer facing toward the machine-contact side provide in each case thread floats across at least four said second MD threads that lie immediately adjacent one another.

15. The woven wire according to claim 1 , wherein said second CD threads have a circular cross-sectional shape.

16. The woven wire according to claim 1 , wherein a ratio of a diameter of said first MD threads to a height of said second MD threads lies in a range from 0.3 to 0.8.

17. The woven wire according to claim 1 , wherein said binder threads extend in the CD-thread direction.

18. The woven wire according to claim 1 , wherein the woven wire fabric has a permeability in a range from 310 cfm (ft 3 /min) to 470 cfm (ft 3 /min).

Assignees

• Voith Patent Gmbh

Inventors

• Boeck Johann
• Mattijssen Johan
• Hoehsl Matthias

Classifications

• D21F1/0045

  Triple layer fabrics · CPC title

• D21F1/105 Primary

  Multi-layer wire-cloths · CPC title

• D03D15/0083

  Textiles & Paper · mapped topic

• D03D11/00

  Double or multi-ply fabrics not otherwise provided for · CPC title

• D03D15/44 Primary

  with specific cross-section or surface shape · CPC title