| 摘要 |
To provide a container usable as a deep bottom- and shallow bottom-type container by changing between deep bottom- and shallow bottom-type container configurations by folding along prescribed ruled lines, forming a protruding part on the circumferential wall surface and forming undistorted smooth surfaces; and to provide a manufacturing method thereof. This container usable as a deep bottom- and shallow bottom-type container in which a deep bottom-type container configuration can be changed into a shallow bottom-type container configuration, wherein said deep-bottom type container is obtained by folding, along prescribed ruled lines, a single blank having a part with prescribed ruled lines and corresponding to the bottom surface, a part sectioned into compact triangles and quadrilaterals and corresponding to a partition surface, and a part corresponding to an inner folded surface, and said deep-bottom type container comprises a protruding part formed without distortion on the circumferential wall surface; and a manufacturing method thereof. |
| 主权项 |
1. A container, capable of serving as both a deep container and a shallow container, that is produced by integrally molding a single blank, and that includes a polygonal bottom face, an open upper face and a peripheral wall face, which is formed of spiral inner folded faces and partition faces that are alternately arranged along the bottom face in a peripheral direction, and for which the individual partition faces are joined together along side edges and are circumferentially raised, with a predetermined inclination, from a peripheral edge of the bottom face to an edge of an upper opening, and the inner folded faces are folded and overlap inner surfaces of the individual partition faces to contact vertexes on the peripheral edge of the bottom face, characterized in that:
for a single sheet of the blank,
a bottom face equivalent portion is defined in a polygonal shape, or a rounded polygonal shape, by forming a ruled line in the center of the blank,partition face equivalent portions are formed, in each of which a quadrilateral portion is defined by a ruled line, and is segmented along a ruled line into a small triangle, which employs, as one side, an outer edge side of the bottom face equivalent portion, and a small quadrilateral, which employs, as one side, another side of the small triangle,inner folded face equivalent portions are defined, by forming ruled lines, in a triangular shape that employs, as vertexes, corners at an outer edge of the bottom face equivalent portion, andthe partition face equivalent portions and the inner folded face equivalent portions are alternately arranged, as constituents, in a spiral manner, or in a radial manner; the blank is folded, by press molding using dies, along mountain fold and valley fold lines that define the individual equivalent portions to produce a deep container where equilateral triangular raised portions and rhombic raised portions are formed at a bottom portion of the peripheral wall face; and when the upper opening of the deep container is extended outward by using fingers, a shape of the deep container is changed to a shape of a shallow container. |
