Method and apparatus for separating monofilaments forming a stra

Details Method and apparatus for separating monofilaments forming a stra Method and apparatus for separating monofilaments forming a stra

1989-10-13

1990-10-02

Schroeder, Werner H.

Textiles: manufacturing

Thread finishing

Surface modification of running length

28217, 28219, 228 11, D01D 100, D02J 118

Patent

active

049598953

ABSTRACT:
A method and apparatus for separating monofilaments, such as glass or carbon monofilaments, forming a strand, is achieved by feeding the strand in a curved path over and in forced contact with a plurality of rods, each being subjected to vibrations. The vibrations, applied transverse to the axis of the strand, provide intermittent localized contact between the filaments and the rod surface, hence preventing high tensile and shear forces which cause breakage of the delicate filaments. In one embodiment, the rods comprise a plurality of resonators dimensioned to be resonant along their longitudinal axis for a predetermined frequency of vibration. The resonators are energized with vibrations from a single resonator dimensioned to operate as a half wavelength resonator. The resonators are provided with a wear resistant, smooth surface coating at the area of contact with the filaments.

REFERENCES:
patent: 3401446 (1968-09-01), Obeda et al.
patent: 3606114 (1971-10-01), Kim
patent: 3780926 (1973-12-01), Davis
patent: 4249986 (1981-02-01), Okeda
patent: 4689244 (1987-08-01), Lusk
"Ultrasonic Engineering", (Book), Julian R. Frederick, pp. 87-103, J. Wiley & Sons (1965).

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