Spinning of yarn
AssigneeNational Research Development Corporation
InventorCarl A. Lawrence
Life of this patent
Estimating the term…
Abstract
Fibres are spun into yarn by being opened close to a surface (S, SD) and directed to the surface, conveniently by suction (AS) through the surface. A yarn or yarn end (Y) is twisted over the surface to have opened fibres built onto it to be spun into a twisted yarn. The surface can be a groove (GD) of included angle less than 90.degree.. The close spacing (WS) of a means to open the fibres and the surface can be such that fibres being opened are within reach of the surface. The yarn is twisted by a twister such as a parallel-belt twister (TB1/TB2) close to but not part of the surface. Tension (T) is applied through the twister to draw off yarn.
Claims18
A method of spinning fibers into yarn including
- providing a supply of fibres,
- providing a surface to receive opened fibres,
- opening the fibres close to said surface, maintaining said closeness as a defined gap with the surface within reach of fibers being opened,
- directing the opening fibers through said gap towards said surface immediately they are opened,
- positioning a yarn in said gap with respect to the surface,
- applying twist to said yarn close to but not through said surface,
- withdrawing the twisted yarn, building fibres directed toward the surface onto the yarn as it is withdrawn,
- thereby spinning fibres from said supply directly into an output yarn including a twist.
A spinning apparatus including means to open fibres from a supply of fibres, a surface to receive said opened fibres positioned close to the place where the fibres are opened and within reach by the fibres as opened, means to direct said opened fibres toward said surface, means to position a yarn over the surface, means separate from but close to said surface to twist the yarn, means to withdraw the yarn, from the surface through said twisting means, said opened fibres directed towards said surface being spun onto the yarn to include a twist.
Dependencies are inferred from the claim text.