Method and apparatus for regulating speed of a longitudinally mo

Details Method and apparatus for regulating speed of a longitudinally mo Method and apparatus for regulating speed of a longitudinally mo

1985-03-13

1987-10-27

Levy, Stuart S.

Advancing material of indeterminate length

Processes

By fluid current

226 97, 350 9620, B65H 5130, G02B 644

Patent

active

047024046

ABSTRACT:
A method and apparatus for precisely regulating the speed of movement of a sensitive fiber in a substantially contact-free manner. The method and apparatus may be used for applying a braking force to a fiber or for accelerating the fiber. The method and apparatus comprise providing at least two capillary tubes having bores of different inside diameters with the bores being axially aligned, introducing a flowing medium such as gas or a more viscous material into the interior of the capillary tubes to flow out the free ends with the majority of the medium flowing out the capillary tube having the larger diameter, moving the fiber axially through the two capillary tubes so that the flow of the medium in the bore of the capillary tube having the larger inside diameter creates a force applied in a direction of the flow to the fiber. If the fiber is moving in the direction of the flow, this force acts to accelerate the fiber and if the fiber is moving in the opposite direction, this force acts to decelerate the fiber.

REFERENCES:
patent: 2302790 (1942-11-01), Modigliani
patent: 2971243 (1961-02-01), Burns
patent: 3144187 (1964-08-01), Naumann
patent: 3645431 (1972-02-01), Harrison
patent: 3944166 (1976-03-01), Hermanns
patent: 4030810 (1977-06-01), Khoe
patent: 4414165 (1983-11-01), Oestreich et al.
patent: 4458476 (1984-10-01), Mayr et al.

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