Clothing for a machine for producing a fibrous material web

Patent metadata

Field	Value
Publication number	US-11261566-B2
Application number	US-201916980449-A
Country	US
Kind code	B2
Filing date	Mar 11, 2019
Priority date	Mar 15, 2018
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A clothing, in particular a seam felt for a machine producing a fibrous material web, in particular a paper, paperboard, tissue or pulp web, includes a base structure including or formed of a two-layer laminate structure formed of one or more flat-woven fabrics. The laminate structure has MD threads forming seam loops at two end sides of the base structure, and the two layers of the laminate structure are connected to one another by the seam loops. The clothing is made endless by connecting the end sides by a seam. The seam is made by interengaging the seam loops of both end sides and introducing an insertion element. The diameter of the seam loops LD and the diameter of the associated MD threads MDYD have a ratio LD/MDYD of between 2.5 and 4, in particular between 2.7 and 3.6.

First claim

The invention claimed is:

1. A clothing or a seam felt for a machine for producing a fibrous material, paper, board, tissue or pulp web, comprising:
a base structure including a two-layer laminate structure formed of one or a plurality of flat-woven fabrics, said base structure having two end sides;
said laminate structure having MD threads being monofilaments with a round cross section forming seam loops at said two end sides of said base structure, said seam loops interconnecting said two layers of said laminate structure, said seam loops having a diameter LD and said associated MD threads having a diameter MDYD;
a seam interconnecting said end sides to make the clothing endless, said seam being formed by interengaging said seam loops of said two end sides and an insertion of an insertion element;
said seam having a loop density of between 64% and 90%; and
said diameter LD of said seam loops and said diameter MDYD of said associated MD threads having a ratio LD/MDYD of between 2.7 and 3.6.

2. The clothing according to claim 1 , wherein at least one of said flat-woven fabrics have floats extending over two or a plurality of threads.

3. The clothing according to claim 1 , wherein each of said flat-woven fabrics has a first and a second long-side end, said two-layer laminate structure has at least one joint at which two of said long-side ends are interconnected, and said interconnected long-side ends belong to an identical flat-woven fabric or to different flat-woven fabrics.

4. The clothing according to claim 3 , wherein said two long-side ends are interconnected by a welded connection or a laser transmission welded connection.

5. The clothing according to claim 3 , wherein said at least one joint has an extent in a machine direction of less than 15 mm.

6. The clothing according to claim 5 , wherein said extent of said at least one joint in the machine direction is less than 5 mm.

7. The clothing according to claim 3 , wherein said at least one joint is made by connecting elements or connecting threads being welded to at least one or both of said long-side ends.

8. The clothing according to claim 7 , wherein said connecting elements are connecting threads disposed in a CD direction of the clothing, and at most three connecting threads or at most two connecting threads are provided for a joint.

9. The clothing according to claim 8 , wherein one or a plurality of said connecting threads are woven with MD threads of at least one of said long-side ends.

10. The clothing according to claim 1 , wherein said diameter of said MD threads is between 0.15 mm and 0.7 mm.

11. The clothing according to claim 10 , wherein said diameter of said MD threads is between 0.3 mm and 0.5 mm.

12. The clothing according to claim 1 , wherein said loop density of said seam is between 72% and 86%.

13. The clothing according to claim 1 , which further comprises one or a plurality of layers of nonwoven fibers disposed at least on an upper side of the clothing for contacting the web.

14. The clothing according to claim 13 , wherein at least some of said nonwoven fibers include or are formed of an elastomer or a polyurethane.

15. The clothing according to claim 1 , which further comprises at least one strip-shaped flow-impeding element provided in a vicinity of said seam, said at least one strip-shaped flow-impeding element being configured to cause a permeability for at least one of air or water in said vicinity of said seam to be substantially identical to a remainder of the clothing.

Assignees

• Voith Patent Gmbh

Inventors

• Eberhardt Robert
• Klaschka Susanne

Classifications

• D21F7/083 Primary

  Multi-layer felts · CPC title

• D21F7/10 Primary

  Seams thereof · CPC title

• D21F1/0054

  Seams thereof · CPC title

• D21F1/0036

  Multi-layer screen-cloths · CPC title