Sealed powder preserving container - is folded from single sheet with bellows formed at each corner

摘要

The sealed preserving container is for use with powdery material, being made by folding a single sheet of material with grooved lines (7, 8) into a rectangular body. A pair of bellows (1A, 1B) form lateral extensions of the central face (9B) between the faces (10A, 10B). Each bellows has two grooved lines (2, 3) of equal length, intersecting at right angles and ending at the intersection points of the main grooved lines (7, 8) in the sheet. Two triangular bellows sections (12A, 12B) are situated at the top corners of the sheet, having bisecting grooved lines (14), and there are two square bellows sections (15A, 15B) with diagonal grooved lines (16) at the bottom corners.