Spinning method and apparatus therefor
AssigneeKabushiki Kaisha Negishi Kobyo Kenkyusho
InventorsEizaburo Negishi, Masanori Negishi
Life of this patent
Estimating the term…
Abstract
A sliver formed along an inner surface of an outer rotor is drawn out through a hole of an inner rotor which is concentrically provided in and rotated differentially to said outer rotor, whereby drafting of said sliver is effectuated by the relation between the speed of drawing out said sliver and differential speed between the inner and outer rotors. Furthermore, floating movement of the fibers of said sliver is effectively suppressed by use of plural or one centrifugal disk which is pressed onto said sliver while being revolved at the rim of the inner rotor and subjected to self-rotation on its axis.
Claims4
An open-end spinning method for forming a yarn comprising the steps of:
- projecting sliver fibers radially outwardly onto the inner surface of an outer rotor so as to form a sliver;
- disposing an inner rotor concentrically within said outer rotor;
- providing said inner rotor with a spinning passage, disposed along a radial line and within a radial plane, which is provided with an inlet disposed toward said inner surface of said outer rotor and an outlet disposed along the axis of said inner rotor;
- conducting said sliver radially inwardly into said spinning passage of said inner rotor and discharging said sliver through said outlet;
- rotating said inner and outer rotors at revolution rates having a predetermined revolution differential defined therebetween,
- whereby said sliver is twisted and subjected to a predetermined amount of tension;
- and
- during the spinning operation, pressing the sliver formed along the inner surface of the outer rotor onto said inner surface by means of at least one centrifugal disk means provided between the inner and outer rotors at a position adjacent the inlet end of the spinning passage of the inner rotor,
- said centrifugal disk being made to revolve concentrically together with the inner rotor and within the outer rotor and to carry-out self-rotation by press-friction with the sliver which results from said disk being moved centrifugally outward toward said sliver and said outer rotor.
A spinning apparatus which comprises:
- a stationary casing;
- an annular, disk-type outer rotor enclosed by said casing;
- a disk-type inner rotor disposed concentrically within said outer rotor;
- a driving mechanism for differentially rotating said inner and outer rotors;
- at least one centrifugal disk between the inner surface of the outer rotor and the periphery of the inner rotor, said disk being supported so as to be freely urged toward said inner surface of said outer rotor as a result of centrifugal force generated as a result of the rotation of the inner rotor and being self-rotated due to frictional contact with the sliver formed along said inner surface of said outer rotor, whereby said disk presses and holds said sliver against said outer rotor so as to thereby suppress floating of said sliver;
- a spinning passage provided within said inner rotor so as to extend radially from the periphery thereof to the axis thereof along a radial line and ithin a radial plane thereof;
- an axially disposed yarn guide tube supported by said casing so that the inlet opening of said yarn guide tube is communicated with said axial portion of the spinning passage;
- a yarn drawing hole provided through said casing and communicated at its inlet part with the outlet of said yarn guide tube;
- and
- said casing being provided with a fiber feeding passage adapted for feeding separated fibers onto the inner surface of the outer rotor.
Dependencies are inferred from the claim text.