Unfolding cup with prefolded convex bottom
OwnerGilbert Capy, Akiva Buchberginventors
Life of this patent
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Abstract
Cup made from a rectangular sheet folded to form a convex base consisting of two isosceles triangles with a common base. The ends of the common base extend into two areas in the shape of deformable lozenges for folding and unfolding the cup while leaving the base flat. When the cup is unfolded by pressing on the edges to draw them together, the ends abut on the edges of the dihedrals forming the cup sides, thereby locking the cup into an open position.
Claims9
Unfolding cup obtained by folding of an elongate rectangular flat sheet comprising, parallel to its length, two edges of width A framing a region of width B in which the side walls (21) of the cup are formed in the shape of a dihedron which are linked by a convex bottom obtained by prior folding of the borders of width A in a "W" shape, characterized in that the convex bottom is produced by the combination of grooves (12, 13, 18, 22) bounding two isosceles triangles inscribed in two pentagons having a common base (9, 30) of length C, less than B, situated on the mid-line longitudinal axis (2) of the sheet and common vertices (4, 5), (23), (28, 29) situated in the middle of the grooves (1) bounding the borders of width A, while each of their ends (10, 11), (25, 26) and (33-36) is common to a vertex of a diamond-shaped region (14) the long diagonal (15) of which is in the extension of the common base (9, 30) of the triangles and pentagons and the deformation of which, leading to folding of the said diamond (14) along one or the other of its diagonals (15, 16) allows unfolding and refolding of the cup.
Dependencies are inferred from the claim text.