A glass fiber bulk strand roving that is made up of a multiplicity of strands, each of which is made up of a plurality of individual fibers, for example, 200 of such fibers. Each strand of the roving has a multiplicity of rather long, axially extending loops, for example, axially extending loops wit
A glass fiber bulk strand roving that is made up of a multiplicity of strands, each of which is made up of a plurality of individual fibers, for example, 200 of such fibers. Each strand of the roving has a multiplicity of rather long, axially extending loops, for example, axially extending loops with a calculated length of at least 6 inches, and a multiplicity of shorter, unbroken, cross-axially extending loops that are formed in the axially extending loops of such strands. The axially extending loops and the cross-axially extending loops interengage and intertwine with one another to form a composite entangled structure. The roving of the present invention is made by a process that uses a finger wheel to form axially extending loops in strands and a spinner downstream of the finger wheel. The looped strands from the finger wheel pass through a relatively unrestricted passage in the spinner which imparts a twist to such a looped strands, and then through a relatively restricted outlet orifice that is downstream of the outlet of the spinner. A back-up or puddling of the looped strands occurs in the spinner near the outlet thereof, due to the axial length of the loops in the strands and the restriction in the outlet of the spinner in the form of the outlet orifice, and this back-up or puddling of the looped strands in the spinner, in conjunction with the spinning thereof, results in the formation of the cross-axial loops in the axial loops of the strands.
대표청구항▼
A method of forming a roving from a plurality; of fibers, the roving having axially extending loops, and a relatively large number of unbroken cross-axially extending loops formed in the axially extending loops and at least partly extending outwardly from the axially extending loops, the axially ext
A method of forming a roving from a plurality; of fibers, the roving having axially extending loops, and a relatively large number of unbroken cross-axially extending loops formed in the axially extending loops and at least partly extending outwardly from the axially extending loops, the axially extending loops and the cross-axially extending loops being interengaged and intertwined with one another, the roving having a relatively high bulk, said method comprising the steps of: providing a plurality of fibers; combining said plurality of fibers into a plurality of strands, each of said strands comprising more than one of said fibers; providing a wheel with a plurality of fingers projecting outwardly therefrom and a central axis; rotating said wheel about said central axis; advancing said plurality of strands in a direction that extends axially of said plurality of strands toward and between the fingers of said wheel as said wheel rotates about said central axis to form a plurality of axially extending loops in each of said plurality of strands; providing a spinner having an inside surface defining a passage with an inlet, an outlet and an axis extending between said inlet and said outlet to receive said plurality of strands with said plurality of loops from said fingers of said wheel; providing an orifice adjacent said outlet of said passage of said spinner, said orifice having an axis that is generally parallel to said axis of said passage of said spinner, the size of said orifice in a plane extending transversely of said axis of said orifice being very small relative to the size of said passage in a plane extending transversely of said passage; rotating said spinner about said axis of said passage; advancing said plurality of strands with said plurality of loops through said passage of said spinner from said inlet to said outlet to thereby twist said plurality of strands with said plurality of loops and form a mass of said plurality of strands with said plurality of loops in said spinner adjacent said outlet of said passage, said mass having no appreciable velocity in a direction extending axially of said plurality of strands with said plurality of loops to form a second plurality of loops in said plurality of strands with said plurality of loops, said second plurality of loops extending crosswise of said plurality of strands with said plurality of loops to interengage and intertwine with said plurality of strands with said plurality of loops and other loops in said second plurality of loops; and withdrawing said plurality of strands with said plurality of loops and said second plurality of loops from said mass in said spinner through said orifice. Apparatus for forming a roving from a plurality of fibers, the roving having generally axially extending loops, a relatively large number of unbroken, cross-axially extending loops formed in the axially extending loops and at least partly extending outwardly from the axially extending loops, the axially extending loops and the cross-axially extenidng loops being interengaged and intertwined with one another, the roving having a realtively high bulk, said apparatus comprising, in combination; means for providing a plurality of fibers; means for combining said plurality of fibers into a plurality of strands, each of said strand scompriisng more than one of said fivers, the number of strnads in said plurality of strand being less than the number of fibers in said plurality of fibers; a wheel having a plurality of fingers projecting outwardly therefrom and a central axis; means for rotating said wheel about said central axis; menas for advancing said plurality of strands in a direction that extends axially of said plurality of strands and between said fingers of said wheel as said wheel rotates about said central axis to form a plurality of axially extending loops in said plurality of strands; a spinner having an inside surface defining an interior passage to receive said plurality of strands with said plurality of axially extending loops from said wheel, said interior passage having an inlet, an outlet, and an axis extending between said inlet and said outlet; orifice means defining an orifice, said orifice means being disposed adjacent said outlet of said passage of said spinner, said orifice means having an axis that is generally parallel to said axis of said passage of said spinner, the size of said oriifce of said orifice means in a plane extending transversely of said axis of said orifice being very small relative to the size of said passage in a plane extending transversely of said interior passage, said means for advancing said plurality of strands with said plurality of axially extending loops into said spinner and through said interior passage from said inlet to said outlet to form a mass of said plurality of strands within said spinner adjacent said outlet, said mass having no appreciable velocity in a direction extending axially of said plurality of strands with said plurality of axially extending loops; and means for rotating said spinner to twist said plurality of strands with said plurality of axially extending loops and to form a second plurality of loops in said mass of said plurality of strands with said plurality of axially extending loops, said second plurality of loops extending crosswise of said plurality of strands with said plurality of axially extending loops to interengage and intertwine with said plurality of strands with said plurality of axially extending loops and other loops in said second plurality of loops, said means for advancing further being effective to withdraw said plurality of strands with said plurality of axially extending loops and said second plurality of loops from said mass in said spinner through said orifice means.
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이 특허를 인용한 특허 (5)
Huff, Norman T.; Karra, Janakikodandaram; Knoll, Gareth; Friedrich, Mark A., Apparatus and method for making low tangle texturized roving.
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