| 摘要 |
Falling of a reinforcing rod is prevented without causing any bend in an optical fiber. A protection sleeve includes a heat shrinkable tube, an adhes ive tube and a reinforcing rod contained in the heat shrinkable tube wherein the heat shrinkable tube, the adhesive tube and the reinforcing rod are bon ded together in a partial section of the heat shrinkable tube in the longitu dinal direction. An apparatus for producing a protection sleeve comprises a jig for securing the protection sleeve, and a heating device. The jig holds and secures a plurality of protection sleeves including the heat shrinkable tube, and the adhesive tube and the reinforcing rod contained therein in par allel while spacing them from each other. The heating device includes a plur ality of hot air openings, a means for setting the distance between the jig and the air opening to a first distance, and a means for setting that distan ce to a second distance which is shorter than the first distance.
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