| 摘要 |
<p>The present invention relates to a flexible container for filling, transport and storage of bulk material and is made from at least one piece of base material (1). The bottom of the container is formed from at least four in pairs equally large flaps (4) which are direct extensions of the container's side walls. The bottom flaps (4) are formed by cut lines (a,b), (c,d), (a',b') and (c',d') in the piece of material (1) and the top angles .alpha. and .beta. of the flaps between the respective cut lines turn in against the centre of the bottom. The sum of the top angles .alpha. and .beta. of the flaps is less than 360.degree. such that the container's bottom formed by joints (7) of the flaps (4) is downward slightly cone or funnel shaped when the container is inflated. The sum of the top angles .alpha. and .beta. of the flaps (4) lies preferably between (240.degree.-280.degree.) and 360.degree.. The contaier's bottom will by having four flaps (4) be squarish or rectangular, depending on whether .alpha. = .beta. or .alpha.?.beta.. Each of the bottom seams (7) can terminate at a distance from the centre of the bottom such that there are no seams in a minor area around the centre, and in this area there can be arranged a discharge spout.</p> |
