PURPOSE: To continuously obtain a thermally contractile tube whose contraction ratio, thickness and length can be freely selected, by supplying a flat adhesive tape and a substrate tape onto a rotary shaft, and connecting this part of said wound tape to its preceding part to form the tube.
CONSTITUTION: An adhesive tape B is continuously wound, and the front side of said adhesive tape B to be wound at the following time is connected to the rear side of the adhesive tape B wound at the preceding time. By pressing the connected parts with a press roll 11, an inner tube A comprising an adhesive layer is continuously formed on the periphery of a rotary shaft body 1. A substrate tape D after being sheeted is drawn, supplied along a helical direction onto the periphery of the inner tube A and continuously wound. At the same time, the front side of the substrate tape D to be wound at the following time is laid upon the rear side of the substrate tape D wound at the preceding time, and said lapping parts are pressed with a press roll 11' to form an outer tube C.
TORII NAOAKI
HOSHINO NOBUHIKO
HASEGAWA NOBORU
WADA TORAO
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