Patent ID: 6428622
Filing Date: 2002-08-06
Classification: C03C

Abstract:
Fiber-coating apparatus comprising an injector having a tubular grid mounted between two dies between which a fiber travels vertically on an axis of the tubular grid which is filled with coating resin that penetrates therein via holes distributed through a cylindrical wall of the tubular grid, wherein the cylindrical wall of the tubular grid has an outside diameter dext lying at a minimum distance from a wall of diameter Dext surrounding the cylindrical wall of the tubular grid in the injector, such that a ratio Dext/dext is not less than 1.35 and a difference Detâˆ’dext is not less than 4 millimeters, with the holes regularly distributed through the cylindrical wall of the tubular grid having a diameter of not less than 0.50 mm and a density of not less than 0.20 holes per mm2, a height of the tubular grid lying in the range 5 mm to 50 mm and a difference between an inside and the outside diameters of the cylindrical wall of the tubular grid, dextâˆ’dint being no greater than 10 mm, with the minimum inside diameter dint of 5 mm.