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US 5,085,252 AGranted
Method of forming variable cross-sectional shaped three-dimensional fabrics
AssigneeNorth Carolina State University
InventorsMansour H. Mohamed, Zhong-Huai Zhang
Life of this patent
Estimating the term…
Abstract
Method of weaving a variable cross-sectional shaped three-dimensional fabric which utilizes different weft yarn insertion from at least one side of the warp layers for selectively inserting weft yarns into different portions of the fabric cross-sectional profile defined by the warp yarn layers during the weaving process. If inserted from both sides of the warp yarn layers, the weft yarns may be inserted simultaneously or alternately from each side of the warp yarn layers. The vertical yarn is then inserted into the fabric by reciprocation of a plurality of harnesses which separate the vertical yarn into a plurality of vertical yarn systems as required by the shape of the three-dimensional fabric being formed.
Claims14
A method for weaving a three-dimensional fabric having a variable predetermined cross-sectional shape comprising the steps of:
- a. providing a plurality of layers of warp yarns which are in horizontal and vertical alignment and maintained under tension, said layers of warp yarns defining a variable predetermined cross-sectional shape;
- b. selectively inserting a plurality of parallel weft yarns which are connected by a loop at the respective fore ends thereof into spaces between said layers of warp yarn, said parallel weft yarns being inserted a predetermined and differential horizontal distance from at least one side of said warp yarn cross-sectional shape in accordance with the shape of the fabric being formed;
- c. threading selvage yarn through the loops at the fore ends of said weft yarns;
- d. bringing a reed into contact with the fell of the fabric being formed;
- e. inserting vertical yarns into spaces between vertical rows of said warp yarns in a direction substantially perpendicular to both said warp and said parallel weft yarns, said vertical yarns being selectively threaded through a plurality of harnesses so as to be separated into a predetermined plurality of vertically movable yarn systems by said harnesses in accordance with the shape of the fabric being formed, and said yarn systems being selectively vertically moved by said harnesses to insert said vertical yarns into said fabric;
- and
- f. forming a three-dimensional fabric by repeating the steps (a)-(e) after insertion of said vertical yarns.
4 more elements
A method for weaving a three-dimensional fabric having a variable predetermined cross-sectional shape comprising the steps of:
- a. providing a plurality of layers of warp yarns which are in horizontal and vertical alignment and maintained under tension, said layers of warp yarns defining a variable predetermined cross-sectional shape;
- b. selectively inserting a plurality of weft yarns which are connected by a loop at the respective fore ends thereof into spaces between said layers of warp yarn, said weft yarns being simultaneously inserted a predetermined and differential horizontal distance from both sides of said warp yarn cross-sectional shape in accordance with the shape of the fabric being formed;
- c. threading selvage yarn through the loops at the fore ends of said weft yarns;
- d. bringing a reed into contact with the fell of the fabric being formed;
- e. inserting vertical yarns into spaces between vertical rows of said warp yarns in a direction substantially perpendicular to both said warp and weft yarns, said vertical yarns being selectively threaded through a plurality of harnesses so as to be separated into a predetermined plurality of vertically movable yarn systems by said harnesses in accordance with the shape of the fabric being formed, and said yarn systems being selectively vertically moved by said harnesses to insert said vertical yarns into said fabric;
- and
- f. repeating the steps (a)-(e) after insertion of said vertical yarns.
4 more elements
A method for weaving a three-dimensional fabric having a variable predetermined cross-sectional shape comprising the steps of:
- a. providing a plurality of layers of warp yarns which are in horizontal and vertical alignment and maintained under tension, said layers of warp yarns defining a variable predetermined cross-sectional shape;
- b. selectively inserting a plurality of weft yarns which are connected by a loop at the respective fore ends thereof into spaces between said layers of warp yarn, said weft yarns being simultaneously inserted a predetermined and differential horizontal distance from both sides of said warp yarn cross-sectional shape in accordance with the shape of the fabric being formed, said weft yarns from one side of said warp yarn cross-sectional shape being inserted different horizontal distances than weft yarns from the other side;
- c. threading selvage yarn through the loops at the fore ends of said weft yarns;
- d. bringing a reed into contact with the feel of the fabric being formed;
- e. inserting vertical yarns into spaces between vertical rows of said warp yarns in a direction substantially perpendicular to both said warp and weft yarns, said vertical yarns being selectively threaded through a plurality of harnesses so as to be separated into a predetermined plurality of vertically movable yarn systems by said harnesses in accordance with the shape of the fabric being formed, and said yarn systems being selectively vertically moved by said harnesses to insert said vertical yarns into said fabric;
- and
- f. repeating the steps (a)-(e) after insertion of said vertical yarns.
4 more elements
A method for wearing a three-dimensional fabric having a variable predetermined cross-sectional shape comprising the steps of:
- a. providing a plurality of layers of warp yarns which are in horizontal and vertical alignment and maintained under tension, said layers of warp yarns defining a variable predetermined cross-sectional shape;
- b. selectively inserting a plurality of weft yarns which are connected by a loop at the respective fore ends thereof into spaces between said layers of warp yarn, said weft yarns being alternatively inserted a predetermined and differential horizontal distance from opposing sides of said warp yarn cross-sectional shape in accordance with the shape of the fabric being formed, said weft yarns from one side of said warp yarn cross-sectional shape being inserted different horizontal distances than weft yarns from the other side;
- c. threading selvage yarn through the loops at the fore ends of said weft yarns;
- d. bringing a reed into contact with the feel of the fabric being formed;
- e. inserting vertical yarns into spaces between vertical rows of said warp yarns in a direction substantially perpendicular to both said warp and weft yarns, said vertical yarns being selectively threaded through a plurality of harnesses so as to be separated into a predetermined plurality of vertically movable yarn systems by said harnesses in accordance with the shape of the fabric being formed, and said yarns systems being selectively vertically moved by said harnesses to insert said vertical yarns into said fabric;
- and
- f. repeating the steps (a)-(e) after insertion of said vertical yarns.
4 more elements
A method for weaving a three-dimensional fabric having a variable predetermined cross-sectional shape comprising the steps of:
- a. providing a plurality of layers of warp yarns which are in horizontal and vertical alignment and maintained under tension, said layers of warp yarns defining a variable predetermined cross-sectional shape;
- b. selectively inserting a plurality of weft yarns which are connected by a loop at the respective fore ends thereof into spaces between said layers of warp yarn, said weft yarns being simultaneously inserted a predetermined and differential horizontal distance from both sides of said warp yarn cross-sectional shape in accordance with the shape of the fabric being formed, said weft yarns from each side of said warp yarn cross-sectional shape being inserted non-uniform horizontal distances;
- c. threading selvage yarn through the loops at the fore ends of said weft yarns;
- d. bringing a reed into contact with the fell of the fabric being formed;
- e. inserting vertical yarns into spaces between vertical rows of said warp yarns in a direction substantially perpendicular to both said warp and weft yarns, said vertical yarns being selectively threaded through a plurality of harnesses so as to be separated into a predetermined plurality of vertically movable yarn systems by said harnesses in accordance with the shape of the fabric being formed, and said yarn systems being selectively vertically moved by said harnesses to insert said vertical yarns into said fabric;
- and
- f. repeating the steps (a)-(e) after insertion of said vertical yarns.
4 more elements
A method for weaving a three-dimensional fabric having a variable predetermined cross-sectional shape comprising the steps of:
- a. providing a plurality of layers of warp yarns which are in horizontal and vertical alignment and maintained under tension, said layers of warp yarns defining a variable predetermined cross-sectional shape;
- b. selectively inserting a plurality of weft yarns which are connected by a loop at the respective fore ends thereof into spaces between said layers of warp yarn, said weft yarns being alternately inserted a predetermined and differential horizontal distance from opposing sides of said warp yarn cross-sectional shape in accordance with the shape of the fabric being formed, said weft yarns from each side of said warp yarn cross-sectional shape being inserted non-uniform horizontal distances;
- c. threading selvage yarn through the loops at the fore ends of said weft yarns;
- d. bringing a reed into contact with the fell of the fabric being formed;
- e. inserting vertical yarns into spaces between vertical rows of said warp yarns in a direction substantially perpendicular to both said warp and weft yarns, said vertical yarns being selectively threaded through a plurality of harnesses so as to be separated into a predetermined plurality of vertically movable yarn systems by said harnesses in accordance with the shape of the fabric being formed, and said yarn systems being selectively vertically moved by said harnesses to insert said vertical yarns into said fabric;
- and
- f. repeating the steps (a)-(e) after insertion of said vertical yarns.
4 more elements
Dependencies are inferred from the claim text.