| 摘要 |
PURPOSE:To prevent the pressure resistance at the boundary between the side wall and the bottom of the tubular body or bag from being impaired by a constitution wherein fiber reinforcer continuously runs along the portion ranging from the side wall to the bottom of the tubular body or bag as an integral material and especially no break of the fiber reinforcer is produced at the boundary between the side wall and the bottom of the tubular body or bag. CONSTITUTION:The main body of the rubber tube or bag is composed of a tubular body consisting of an inner rubber layer 1, the fiber reinforcing layer 2 such as woven fabric or the like, and an outer rubber layer 3. The tubular body 4 has longitudinal creases 5 and 5', along which the body 4 is easily folded when folded flat. The cut opening part 7 of an overhanged part 6, which is formed by cutting so as to overhang its central part in a circular arc is closed by covering with a piece of rubber layer 8 in order for the overhanged part 6 to be folded inside the tubular body 4 with creases 9, along which the overhanged part is easily folded when folded flat. Due to the constitution as mentioned above, the whole tubular body is kept flat normally, while, when the interior of the tubular body 4 is packed, the overhanged part 6 is unfolded in order to form the bottom of the tubular body with the expansion of the whole tubular body. |
