Yarn spinning apparatus and process
AssigneeBarmag Barmer Maschinenfabrik AG
InventorsPeter Dammann, Heinz Schippers, Herbert Turk, Herbert Schiminski
Life of this patent
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Abstract
Yarn spinning machinery and process utilizing a pair of perforated sieve belts, cylindrical sieve drums or hyperboloid sieve drums for twisting staple fibres at a line of yarn formation wherein the sieve members are moving in opposite directions while air currents are drawn through the sieve members on opposite sides of, and in opposite, twist-assisting flow directions, the line of yarn formation.
Claims54
A process for spinning fibers to form a yarn which comprises rotating a body of discrete fibers in a yarn forming zone in a space between two adjacent air permeable surfaces moving in substantially opposite directions across the yarn forming zone, while passing respective currents of air through different segments of said space separated by and on opposite sides of the yarn being formed in said yarn forming zone, the respective currents of air flowing through said space in substantially opposite directions with the vectors of movement of said moving surfaces and the vectors of movement of said currents of air respectively on said opposite sides of the yarn being formed and being the same as the direction of rotation of the yarn which is being formed and also collectively encircling said yarn which is being formed.
A process for spinning fibers to form a yarn which comprises rotating a body of discrete fibers in a yarn forming zone between two adjacent air permeable surfaces moving in substantially opposite directions at the yarn forming zone while passing respective currents of air in respective opposite directions through said permeable surfaces near the body of rotating fibers and thereby forming a yarn, and the vectors of movement of both of said surfaces at said yarn forming zone having a component in the direction of the axis of the yarn being formed to impart axial movement of said yarn through the yarn forming zone.
A process for spinning fibers to form a yarn which comprises rotating a body of discrete fibers in a yarn forming zone between two adjacent air permeable surfaces moving in substantially opposite directions while passing respective currents of air in respective opposite directions through said permeable surfaces near the body of rotating fibers and thereby forming a yarn, the improvement wherein said moving surfaces are respectively hyperbolically concave and are generated by respective hyperboloids orbited about respective axes of rotation of said surfaces, which axes are at such angle relative to each other so that the longitudinal axes of the yarn produced in said yarn producing zone between said hyperbolically concave surfaces is parallel to one generatrix of each hyperboloid.
Apparatus for production of yarns from discrete fibers which comprises two, spaced, air permeable surfaces moving in opposite directions on opposite sides of a yarn producing zone situated in a narrow space between said surfaces, first and second air suction means each respectively embodying an air entry opening extending longitudinally adjacent said yarn producing zone on the respective sides of said moving surfaces which are remote from said zone for drawing respective currents of air through said moving surfaces, each of said air entry openings being positioned relative to said yarn producing zone to draw substantially all of its current of air through its respective moving surface in the area thereof immediately preceding the yarn producing zone, as viewed in the direction of movement of its respective moving surface, and feed means for feeding discrete fibers between said surfaces in the vicinity of said yarn forming zone.
Apparatus for production of yarns from discrete fibers which comprises two, spaced, air permeable surfaces moving in opposite directions and providing therebetween a yarn producing zone, first and second air suction means on the respective sides of said moving surfaces which are remote from said zone for drawing respective currents of air through said moving surfaces, each of said air suction means providing through its respective moving surface a current of air immediately preceding the yarn producing zone, as viewed in the direction of movement of its respective moving surface, and feed means for feeding discrete fibers between said surfaces in the vicinity of said yarn forming zone, wherein said surfaces are surfaces of respective, air permeable, endless belt means having opposed spaced planar segments having diagonally opposite, linear directions of travel and crossing each other at said yarn producing zone.
Apparatus for production of yarns from discrete fibers which comprises two, spaced, air permeable surfaces moving in opposite directions and providing therebetween a yarn producing zone, first and second air suction means on the respective sides of said moving surfaces which are remote from said zone for drawing respective currents of air through said moving surfaces, each of said air suction means providing through its respective moving surface a current of air immediately preceding the yarn producing zone, as viewed in the direction of movement of its respective moving surface, and feed means for feeding discrete fibers between said surfaces in the vicinity of said yarn forming zone embodying a first feed device for supply of discrete fibers onto one moving surface ahead of said yarn forming zone, as viewed in the direction of movement of said one moving surface, and a second feed device for supply of discrete fibers onto the other moving surface ahead of said yarn forming zone, as viewed in the direction of movement of said other moving surface.
Apparatus for production of yarns from discrete fibers which comprises two, spaced, air permeable surfaces moving in opposite directions and providing therebetween a yarn producing zone, first and second air suction means on the respective sides of said moving surfaces which are remote from said zone for drawing respective currents of air through said moving surfaces, each of said air suction means providing through its respective moving surface a current of air immediately preceding the yarn producing zone, as viewed in the direction of movement of its respective moving surface, and feed means for feeding discrete fibers between said surfaces in the vicinity of said yarn forming zone, wherein said moving surfaces are respectively hyperbolically concave and are generated by respective hyperboloids orbited about respective axes of rotation of said surfaces, which axes are at such angle relative to each other so that the longitudinal axis of the yarn produced in said yarn producing zone between said hyperbolically concave surfaces is parallel to one generatrix of each hyperboloid.
A process wherein discrete fibers are spun into a yarn between two opposed surfaces moving in opposite directions while drawing an air current through at least one of said surfaces in a defined area thereof, the line of yarn formation being within a defined area of said opposed surfaces, said surfaces imparting rotation to said fibers and also axial motion to the yarn being produced along said line of yarn formation, characterized by said surfaces having motion vectors which intersect at an angle in the narrowest gap between said surfaces and that the defined area of said line of yarn formation lies substantially on a line bisecting said angle.
A process wherein discrete fibers are spun into a yarn along a line of yarn formation in a gap between two opposed surfaces moving in opposite directions while a current of air passes through at least one of said surfaces in a defined area adjacent said line of yarn formation, characterized by rotating a needle coaxially with the line of yarn formation in the same direction as the direction of rotation of the fibres between said surfaces with the tip of said needle positioned within the rotating fibres.
Apparatus for producing yarns for discrete fibers which comprises two, spaced surfaces moving in opposite directions, at least one of said surfaces being air permeable, means for passing a current of air through the air permeable surface or surfaces, said surfaces and current of air imparting rotation to said fibres to cause them to twist into a yarn along a line of yarn formation between said surfaces, characterized by a rotatably driven needle which is coaxially with said line of yarn formation and the tip of the needle extending between said surfaces and into the body of fibres rotating between said surfaces.
Apparatus for producing yarns from discrete fibres which comprises first and second bodies of rotation having circumferential surfaces defined by revolving hyperboloids about axes of revolution, the axes of rotation of said bodies being oriented relative to each other such that the hyperboloid surfaces form a nip limited by a corresponding generatrix, at least one of said surfaces being air permeable, means to provide a current of air through said air permeable surface or surfaces along an area whose borders are parallel with the generatrix forming said nip and between the line of yarn formation, between said surfaces, and the nip.
A process for spinning fibres to form a yarn which comprises rotating a body of discrete fibres in a yarn forming zone in a space between two adjacent air permeable surfaces moving in substantially opposite directions across the yarn forming zone, while drawing through different segments of said space separated by and on opposite sides of the yarn being formed in said yarn forming zone two currents of air which respectively pass through opposite air permeable surfaces in an area of each extending longitudinally along and immediately preceding the yarn forming zone, as viewed in the direction of movement of its respective moving surface, to provide currents of air which collectively substantially encircle the yarn being produced and having respective vectors of movement which are the same as the direction of rotation of said yarn in said yarn producing zone.
Dependencies are inferred from the claim text.