Method of producing tape type optical fiber core wire
AssigneeSumitomo Electric Industries, Ltd.
InventorsKen Takahashi, Shigenori Takaki, Ryoei Oka, Tomoyuki Hattori, Toshihisa Sato, Kohei Kobayashi, Kaoru Okuno
Life of this patent
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Abstract
In a method of making a ribbon type coated optical fiber 3 comprising the step of inserting a plurality of optical fibers 1 flatly arranged parallel to each other through a die orifice 11a so as to collectively coat the optical fibers with a coating resin 2, the ratio W/H of a clearance W in the width direction between the inner surface of the die orifice 11a and the outer surface of the optical fibers 1 to a clearance H in the thickness direction therebetween is set within the range of 1.0 to 2.5.
Claims11
A method of making a coated optical fiber ribbon comprising the step of inserting a plurality of optical fibers flatly arranged parallel to each other through a die orifice of a coating apparatus so as to collectively coat the optical fibers with a coating resin, wherein the ratio W/H of a clearance W in a width direction between an inner surface of said die orifice and an outer surface of said optical fibers to a clearance H in a thickness direction therebetween is set within the range of 1.0 to 2.5
A method of making a coated optical fiber ribbon comprising a step of, while flatly arranging a plurality of optical fibers parallel to each other, inserting the optical fibers through a die orifice of a sub-unit coating apparatus and coating the optical fibers with an inner layer coating resin so as to form at least two sub-units;
- and a step of, while flatly arranging at least two sub-units parallel to each other, inserting the sub-units through a die orifice of an outer layer coating apparatus and collectively coating the sub-units with an outer layer coating resin so as to form the coated optical fiber ribbon;
- wherein the ratio of Ws/Hs of a clearance Ws in a width direction between an inner surface of said sub-unit die orifice and an outer surface of said sub-units to a clearance Hs in a thickness direction therebetween is set within the range of 1.0 to 2.5, and
- wherein the ratio Wg/Hg of a clearance Wg in the width direction between an inner surface of said outer layer die orifice and the outer surface of said sub-units to a clearance Hg in the thickness direction therebetween is set within the range of 1.0 to 2.5.
Dependencies are inferred from the claim text.