| 摘要 |
A flexible container for filling, transport and storage of bulk material is made from at least one piece of base material. The bottom of the container is formed from at least four paired, preferably equally large, flaps which are direct extensions of the container side walls. The bottom flaps are formed by cut lines in the piece of material, and the angles alpha and beta of alternate flaps converge toward the center of the bottom. The sum of top angles alpha and beta of the flaps is less than 360 DEG , such that the container bottom formed by joints of the flaps is downward slightly cone or funnel shaped when the container is filled. The sum of the angles alpha and beta of the flaps preferably is between (240 DEG -280 DEG ) and 360 DEG . The container bottom will be substantially square or rectangular, depending on whether alpha = beta or alpha NOTEQUAL beta . Each of the bottom seams can terminate at a distance from the center of the bottom such that there are no seams in a minor area around the center, and in this area there can be arranged a discharge spout. |
