Method of detecting pinholes in hollow fibers
AssigneeMitsubishi Rayon Co., Ltd.
InventorsYasuteru Tahara, Kazuyoshi Koike
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Abstract
A method of and a system for detecting pinholes in hollow fibers by passing a liquid filled fiber into a zone of pressurized gas wherein the pressure of a gas is higher than that of a liquid inside the hollow fiber so that bubbles may be injected through pinholes contained in said hollow fiber and then passing the fiber through a bubble detector. The system can be operated continuously with the pinhole detector being between a device for continuously feeding the hollow fiber and a device for winding up said hollow fiber.
Claims10
A method of detecting pinholes in hollow fibers wherein a fiber is filled with liquid, the filled fiber is fed to a zone containing a gas outside the fiber which gas has a pressure greater than the pressure of liquid within the fiber whereby a bubble is formed inside the fiber at a pinhole and the fiber is thereafter fed to a bubble detector.
A system for detecting pinholes in hollow fibers comprising a means for introducing liquid into a hollow fiber, a feeding means to feed fiber through the system, a chamber which contains gas under a pressure higher than that of the liquid within the fiber and through which the fiber is fed by the feeding means, whereby a bubble is formed if there is a pinhole, and a bubble detector to which the fiber is fed from the chamber, for detecting such bubble.
Dependencies are inferred from the claim text.