| 摘要 |
PROBLEM TO BE SOLVED: To reduce a content of air existing on the free surface of a product by folding a pliable sheet having triangle cross-sectional surfaces each being reduced in an area from the base part to the apex part along its three peripheries in a sealed manner in a bag-like package for packaging the quantity of a predetermined product. SOLUTION: The bag body 1 includes a base part 2 and apex part 3, and a substantially triangle cross section between these base part 2 and apex part 3. The base part 2 is joined to the apex part 3 with three triangle surfaces 4-6, two triangle surfaces 4, 5 among them are formed into a right-angled triangle, and the remaining triangle surface 6 is made into an isosceles triangle. Furthermore, the bag body 1 is sealed along three peripheral parts 7-9, and the peripheral part 7 extends from the base part 2 to the apex 3, and also the peripheral parts 8, 9 extends from the triangle surface 6 to the peripheral part 7. Such a bag body 1 is obtained by folding a rectangular sheet having four equal sides, wherein a length of the peripheral part 7 corresponds to a length twice as long as the peripheral parts 8, 9, and the peripheral parts 7-9 are sealed by welding or the like.
|
