# US 10,309,573 B2 · Asymmetrical fabrics composition for winding applications in pipe relining

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,309,573 B2
- Document ID: US10309573B2
- Status: Granted
- Kind: B2
- Application number: 15/512,074
- Filed: 2015-10-20
- Published: 2017-09-07
- Granted: 2019-06-04
- Earliest claimed: 2014-10-24
- Assignees: OCV Intellectual Capital, LLC
- Applicants: OCV Intellectual Capital, LLC
- Inventors: Antoni Serarols Beltran
- Web page: https://patentgrep.com/patent/US10309573B2

## CPC

- F16L 55/1656: {materials for flexible liners}
- B29C 63/04: by folding, winding, bending or the like
- B29C 63/105: {continuously}
- B29C 63/14: around tubular articles
- B29C 73/04: using preformed elements
- B32B 3/263: {characterised by a layer having non-uniform thickness}
- B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)}
- B32B 5/08: the fibres or filaments of a layer being of different substances {, e.g. conjugate fibres, mixture of different fibres}
- B32B 5/10: characterised by a fibrous {or filamentary} layer reinforced with filaments
- B32B 5/12: characterised by the relative arrangement of fibres or filaments of {different layers, e.g. the fibres or filaments being parallel or perpendicular to each other}
- B32B 5/22: characterised by the presence of two or more layers which {are next to each other and are fibrous, filamentary, formed of particles or foamed (layer formed of natural mineral fibres or particles next to a foam layer B32B19/047, next to a layer made of particles B32B19/048, or next to a fibrous or filamentary layer B32B19/06; paper layer or cardboard layer next to a paper layer or cardboard layer B32B29/005, next to a foam layer B32B29/007, next to a fibrous or filamentary layer B32B29/02, or next to a particulate layer B32B29/04)}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/05: the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection (using interposed adhesives or bonding materials applied in spaced arrangements B32B7/14)
- F16L 55/1655: {a pipe being formed inside the old pipe by winding strip-material}
- B29K 2913/00: Use of textile products or fabrics as mould materials
- B29L 2023/001: {Tubular films, sleeves}
- B29L 2023/22: {Tubes or pipes, i.e. rigid (bent tubes not for use as pipe couplings B29L2023/004)}
- B32B 2250/20: All layers being fibrous or filamentary
- B32B 2262/02: Synthetic macromolecular fibres
- B32B 2262/0246: Acrylic resin fibres
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0261: Polyamide fibres
- B32B 2262/0269: Aromatic polyamide fibres
- B32B 2262/0276: Polyester fibres
- B32B 2262/101: Glass fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2262/14: Mixture of at least two fibres made of different materials
- B32B 2307/72: Density
- B32B 2597/00: Tubular articles, e.g. hoses, pipes
- F16L 55/1651: {the flexible liner being everted}
- F16L 55/1652: {the flexible liner being pulled into the damaged section}
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A continuous fabric for use in forming a repair liner for reinforcing a pipe. The fabric includes a top layer and one or more bottom layers. The width of the top layer is less than the width of the continuous fabric and the density of the top layer is less than the density of at least one of the at least one or more bottom layers. The top layer may serve as a guide for winding the fabric in an overlapping pattern about a mandrel so that the essentially only the top layer is visible in the fabric winding.

## Claims

### Claim 1

A continuous fabric for use in forming a repair liner for reinforcing a pipe, the continuous fabric comprising:
a continuous first portion having a first width; and
a continuous second portion having a second width;
wherein a sum of the first width and the second width equals a total width of the continuous fabric,
wherein the first width is greater than the second width,
wherein a maximum thickness of the first portion is less than a maximum thickness of the second portion,
wherein a first side of the continuous fabric extending across the second width has a first density,
wherein a second side of the continuous fabric extending across the total width has a second density,
wherein the first density is in the range of 10-80 g/m2, and
wherein the second density is in the range of 35-700 g/m2.

### Claim 2 (depends on 1)

The continuous fabric of claim 1, wherein a thickness of the first portion is less at a side of the first portion forming an outer edge of the continuous fabric than a side of the first portion forming an interface between the first portion and the second portion.

### Claim 3 (depends on 1)

The continuous fabric of claim 1, wherein a thickness of the second portion is less at a side of the second portion forming an outer edge of the continuous fabric than a side of the second portion forming an interface between the first portion and the second portion.

### Claim 4 (depends on 1)

The continuous fabric of claim 1, wherein the first width is between 30% and 90% of the total width of the continuous fabric.

### Claim 5 (depends on 1)

The continuous fabric of claim 1, wherein the first width is between 300 mm and 1,300 mm.

### Claim 6 (depends on 1)

The continuous fabric of claim 1, wherein the second width is between 10% and 50% of the total width of the continuous fabric.

### Claim 7 (depends on 1)

The continuous fabric of claim 1, wherein the second width is between 100 mm and 500 mm.

### Claim 8 (depends on 1)

The continuous fabric of claim 1, wherein the maximum thickness of the first portion is between 75% and 95% of a maximum thickness of the continuous fabric.

### Claim 9 (depends on 1)

The continuous fabric of claim 1, wherein a step is formed at an interface between the first portion and the second portion.

### Claim 10 (depends on 9)

The continuous fabric of claim 9, wherein a height of the step is 1 mm.

### Claim 11 (depends on 1)

The continuous fabric of claim 1, wherein the second density is in the range of 100-400 g/m2.