Method and apparatus for the manufacture of glass fiber strand r

Details Method and apparatus for the manufacture of glass fiber strand r Method and apparatus for the manufacture of glass fiber strand r

1987-10-19

1988-12-13

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

With fluid jet

28271, 57 2, 57200, 57206, 57208, 57246, 57249, 57333, 57341, D01H 700, D02G 318, D02G 322, D02J 102

Patent

active

047901365

ABSTRACT:
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 for 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 co-axial spinner with an inlet that is positioned above or below 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 strand, 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. The positions of the finger wheel and the spinner relative to one another are variable to permit variation in the characteristics of the bulk strand roving that is produced thereby.

REFERENCES:
patent: 2795926 (1957-06-01), Drummond
patent: 3118213 (1964-01-01), Benson et al.
patent: 3324641 (1967-06-01), Benson et al.
patent: 4741151 (1988-05-01), Klink et al.

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