| 摘要 |
PROBLEM TO BE SOLVED: To manufacture an airtight bag having different diameters which excels in durability and is appropriately lined, by forming an appropriate lining 4 on an inner surface of a cylindrical woven fabric 1 having different diameters. SOLUTION: A method for manufacturing the bag A having different diameters having an airtight property by applying the lining 4 inside the cylindrical woven fabric 1 having different diameters. The method includes covering a heat shrinkable tube 10 on the outside of an airtight core body 5 with substantially the same shape as the bag having different diameters to be manufactured and a slightly smaller diameter than that of the bag, heat shrinking the heat shrinkable tube 10 to conform it to the outer surface of the core body 5, cooling the heat shrinkable tube 10 and removing the core body 5 after the shape of the tube is fixed, inserting the obtained tube 11 having different diameters into the cylindrical woven fabric 1 having different diameters, inflating the tube 11 having different diameters by an inside pressure to press-contact it to the inner surface of the cylindrical woven fabric 1 having different diameters, and adhering the tube 11 having different diameters to the cylindrical woven fabric 1 having different diameters. As a result, because the heat shrinkable tube is thermally contracted to conform it on the surface of the core body, a seamless tube having different diameters conformed to the surface shape of the core body can be obtained. The different diameter tube can be inserted into the different diameter cylindrical woven fabric 1 for inflating the tube, to apply an appropriate lining 2 onto the inner surface the different diameter cylindrical woven fabric 1 to obtain the airtight different diameter bag. COPYRIGHT: (C)2010,JPO&INPIT
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