| 摘要 |
PROBLEM TO BE SOLVED: To put a bag for extraction which is extracted to a cup, etc., in an erecting state without inclining the bag. SOLUTION: This bag has a liquid-permeable flat bag 2 which is formed to allow bulging and deforming and in which raw material for extraction is housed, a pair of outside surface sheets 3 and 4 which are joined to the opposite outside surfaces of the bag 2 and detaining pieces 5 and 6 which have slits 7 and 8 to be inserted with external members, are respectively raisably and integrally formed to a pair of the respective outside surface sheets 3 and 4 and detain the bag 2 to the external members in the bulging state by detaining the slits 7 and 8 to the external members to the erecting state with respect to the external members. The detaining pieces 5 and 6 are successively disposed on one side to the outside surface sheets 3 and 4 and are formed with stress concentrating parts 5c and 6c at the time of raising on the side opposite to the successively disposed side. The outer sides of the stress concentrating parts 5c and 6c at the outside surface sheets 3 and 4 are not joined to the bag and the insertion beginning ends 7a and 8a of the external members of the slits 7 and 8 are drawn. |
