Patent ID: 6497601
Filing Date: 2002-12-24
Classification: G09F

Abstract:
A folding three dimensional construction in the form of a cube, comprising:a square front side, a square back side, square first and second sides, said first and second sides being joined at side edges to side edges of said front side and said back side, at least one pair of said side edges being removably attached; said square first side having a diagonal perforation extending from an upper corner to a lower corner and said square second side having a diagonal perforation extending from an opposite upper corner to an opposite lower corner; a first triangular top portion, said first top portion being formed as a right triangle having a hypotenuse and first and second adjacent sides and having a perforation line extending from a midpoint of said hypotenuse to an intersection of said adjacent sides; said first triangular top portion being joined at said first adjacent side to a top edge of said square first side and removably attached adjacent a top edge of said square front side; a second triangular top portion, said second top portion being formed as a right triangle having a hypotenuse and first and second adjacent sides and having a perforation line extending from a midpoint of said hypotenuse to an intersection of said adjacent sides; said second triangular top portion being joined at said first adjacent side to a top edge of said square second side and removably attached adjacent a top edge of said square back side; a first triangular bottom portion, said first bottom portion being formed as a right triangle having a hypotenuse and first and second adjacent sides and having a perforation line extending from a midpoint of said hypotenuse to an intersection of said adjacent sides; said first triangular bottom portion being joined at said first adjacent side to a bottom edge of said square first side and removably attached adjacent a bottom edge of said square front side; a second triangular bottom portion, said second bottom portion being formed as a right triangle having a hypotenuse and first and second adjacent sides and having a perforation line extending from a midpoint of said hypotenuse to an intersection of said adjacent sides; said second triangular bottom portion being joined at said first adjacent side to a bottom edge of said square second side and removably attached adjacent a bottom edge of said square back side; first, second, third and fourth tensioning portions, said tensioning portions being joined top edges of said front and back sides and bottom edges of said front and back sides, respectively; each of said tensioning portions being disposed beneath one of said first and second triangular top and bottom portions; each of said tensioning portions having a means for attaching a tensioning means; a first tensioning means, said first tensioning means connecting said first tensioning portion to said second tensioning portion and urging said portions toward one another; a second tensioning means, said second tensioning means connecting said third tensioning portion to said fourth tensioning portion and urging said portions toward one another; and whereby, when the construction in the form of a cube is twisted about the diagonal perforations, the perforations will be displaced toward a center of the cube while stretching the first and second tensioning means and the cube will then collapse into a flattened square and the tension in the first and second tensioning means will be reduced.