Structured forming fabric for a papermaking machine, and papermaking machine

Patent metadata

Field	Value
Publication number	US-9879376-B2
Application number	US-201514822151-A
Country	US
Kind code	B2
Filing date	Aug 10, 2015
Priority date	Aug 10, 2015
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A forming fabric for a papermaking machine has a machine facing side and a web facing side. The web facing side has a structured weave of warp yarns and weft yarns that define pockets on the web facing side. Each pocket is defined by four sides on the web facing side, three of the four sides each being formed by a knuckle of a single yarn, and one of the sides being formed by a knuckle of a weft and of a warp yarn, wherein the weft yarn also defines a bottom surface of the pocket.

First claim

The invention claimed is:

1. A fabric for a papermaking machine, the fabric comprising:
a machine facing side;
a web facing side having pockets formed by machine direction warp yarns and cross-direction weft yarns;
each pocket having a bottom surface and a compression surface surrounding said bottom surface;
said compression surface being defined by four sides on the web facing side, three of said four sides each being formed by a knuckle of a single yarn, and one of said four sides being formed by exactly one knuckle of a weft yarn and exactly one knuckle of a warp yarn, and said warp yarn also defining a part of said bottom surface of said pocket.

2. The fabric according to claim 1 , wherein said warp yarn defines a knuckle that passes over five consecutive weft yarns.

3. The fabric according to claim 1 , wherein two of said four sides are formed by second and third warp knuckles of single warp yarns, and one of said four sides is formed by a second weft knuckle of a single weft yarn.

4. The fabric according to claim 3 , wherein said second weft knuckle has ends that are passed over by said second and third warp knuckles.

5. The fabric according to claim 3 , wherein each weft knuckle passes over two consecutive warp yarns, and each warp knuckle passes over five consecutive weft yarns.

6. The fabric according to claim 1 , wherein:
said warp yarns and said weft yarns form a repeating weave pattern with a pattern repeat including ten weft yarns and ten warp yarns;
said pockets are arranged along a plurality of rows that extend diagonally relative to a direction of said warp and said weft yarns and parallel relative to one another; and
similar sides of consecutive said pockets arranged along a respective said row are offset from one another by three warp yarns and one weft yarn.

7. The fabric according to claim 1 , wherein said bottom surface of each of said pockets is defined by two warp yarns interwoven with two weft yarns in a plain weave.

8. The fabric according to claim 1 , wherein:
the warp yarns and said weft yarns form a repeating weave pattern with a pattern repeat including ten weft yarns and ten warp yarns; and
each of said ten warp yarns having a pattern of passing over five consecutive weft yarns, passing under one weft yarn, passing over one weft yarn, and passing under three consecutive weft yarns.

9. The fabric according to claim 1 , wherein said warp yarns are non-circular yarns.

10. A papermaking machine, comprising a paper forming fabric according to claim 1 .

11. A fabric for a papermaking machine, the fabric comprising:
a machine facing side;
a web facing side having pockets formed by machine direction warp yarns and cross-direction weft yarns;
each of said pockets having a bottom surface and a compression surface surrounding said bottom surface;
said compression surface being defined by four sides on said web facing side, said four sides including a first side, a second side, a third side, and a fourth side, and wherein:
said first side is a warp knuckle that passes over five consecutive weft yarns;
said second side is a weft knuckle of a fourth one of said five consecutive weft yarns passed over by said first side warp knuckle;
said third side is a warp knuckle that passes over five consecutive weft yarns and said second side is a third one of said five consecutive weft yarns passed over by said third side warp knuckle;
and said fourth side includes a weft knuckle and a warp knuckle, said fourth side weft knuckle being a first one of said weft yarns passed over by said first side warp knuckle and said fourth side warp knuckle being a warp yarn that also defines a part of said bottom surface of said pocket.

12. The fabric according to claim 11 , wherein said first side and said warp yarn that defines a part of said bottom surface of said pocket are mutually adjacent warp yarns.

13. The fabric according to claim 11 , wherein said first side and said third side are defined by warp yarns that are separated by two warp yarns.

14. A papermaking machine, comprising a paper forming fabric according to claim 11 .

Assignees

• Voith Patent Gmbh

Inventors

• Quigley Scott D

Classifications

• D03D13/00

  Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft · CPC title

• D21F1/0027 Primary

  Screen-cloths · CPC title