LIQUID TRANSPORTING BAG

PURPOSE:To improve the stability of a liquid transporting bag by a method wherein an inner bag is inserted into an outer bag from its opening, after covering the opening with covering pieces, the inner bag is expanded with air into close contact with the inner surface of the outer bag and liquid is poured into the inner bag to replace the air therewith. CONSTITUTION:When a liquid is transported using a movable transporting bag, an inner bag 10 is inserted into an outer bag 20 from an opening 24 of its top part 22 and joints are formed between these two bags by attaching together the four corners of the bottom surface of each bag with joining members 42. After matching in position of the pouring openings 12 and 14 of the inner bag 10 and its discharge opening 16 with the openings 34, 36 and 38 of the outer bag 20, covering pieces 26, 27 and 28 are placed on an opening 24 in that order to cover it and are secured together by engaging parts 30 and 32. Either of the pouring openings 12 and 14 is then opened in order for the inner bag 10 to be filled with air and expanded, whereby the inner bag is set in close contact with the inner surface of the outer bag 20 and in a standing position. Either of the pouring openings 12 and 14 is then opened to external air and liquid is thereafter poured into the inner bag from the other opening.