Textiles: manufacturing – Thread finishing – Surface modification of running length
Patent
1977-10-14
1978-07-11
Rimrodt, Louis K.
Textiles: manufacturing
Thread finishing
Surface modification of running length
57 34B, D02G 116, D02J 108
Patent
active
040993086
ABSTRACT:
An improved fluid jet bulking device is disclosed in which a yarn feed needle is eccentrically positioned with respect to a venturi and is further provided with a staged means for generation of turbulence in the yarn bulking fluid. The needle may include a flanged end portion which develops a first stage of turbulence generation in the fluid within the venturi inlet, an accelerated flow passage. A second stage of turbulence generation at the distal end of the yarn feed needle augments the level and intensity of turbulence generated in the compressible fluid passing through the device. Fluid flow in the venturi inlet is non-axisymmetric due to the eccentricity so that the successive stages of turbulence generation interact with one another to develop a highly complex turbulent flow regime. The yarn feed needle is preferably constructed such that the turbulent flow generated by the successive stages induces a lateral vibration to the distal end of the needle, thereby creating a non-steady three-dimensional flow. As an alternative to the flanged end porton, a plurality of generally radially extending spokes may be provided at the distal end of the needle to effect a first stage of turbulence generation. In another alternative, a conical surface of the distal end may be provided with suitable scoring marks to further develop turbulent flow in a compressible fluid passing between the yarn feed needle and the venturi.
REFERENCES:
patent: 2994938 (1961-08-01), Loveland et al.
patent: 3262177 (1966-07-01), Cobb et al.
patent: 3402446 (1968-09-01), Benson
patent: 3559860 (1971-02-01), East
Celanese Corporation
Rimrodt Louis K.
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