Patent ID: 8756906

Claim:
A coated optical fiber producing apparatus of producing a coated optical fiber having a glass optical fiber, which is constituted by a glass core region and a glass cladding region provided on an outer periphery of the core region, and a resin layer coated on a surface of the glass optical fiber, the coated optical fiber being wound onto a bobbin in a state of being provided with a twist, the apparatus comprising: a twist provider providing the twist to the coated optical fiber; an upstream twist inhibiting roller, arranged upstream of the twist provider with respect to a traveling direction of the coated optical fiber, inhibiting a rotation of the coated optical fiber around the axis of the coated optical fiber with no twist; a twist non-inhibiting roller, arranged between the upstream twist inhibiting roller and the twist provider, not inhibiting the rotation of the coated optical fiber around the axis of the coated optical fiber, the twist non-inhibiting roller adjusting a length of a path line between the upstream twist inhibiting unit and the twist provider by maintaining the path line of the coated optical fiber between the upstream twist inhibiting roller and the twist provider in a bent state; and a winder winding the coated optical fiber, to which the twist has been provided, onto the bobbin.