Package formed of soft sheet

Abstract

There is disclosed a package including a box body having an opening and a cover member for closing the opening of the box body. The box body is formed of a packaging material of a soft sheet having a monolayer of a resin film or a multi-layer structure having a resin film. The box body includes: a rectangular bottom face portion; four side face portions folded from the four sides of the bottom face portion; corner sealing portions formed by jointing the inner faces of the side face portions at corner portions between the adjoining side face portions; flange portions folded outward of the box body from the upper ends of the side face portions substantially at a right angle thereto and with a predetermined width size; and flange jointing portions jointing the flange portions folded from the side face portions without any clearance between each other at the upper ends of the corner portions between the adjoining side face portions. The cover member is formed of a packaging material of a soft sheet having a monolayer of a resin film or a multi-layer structure having a resin film. The cover member is jointed to the upper surfaces of the flange portions and the flange jointing portions which are formed continuously along the upper ends of the side face portions and the upper ends of the corner portions.