ES1005561U - Sheet folding and extendible. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Foil folding extendible, particularly applicable to maps, plans and analogues, characterized by comprising a plate portion essentially quadrangular, of a material such as paper or cardboard, in which are conducted a plurality of lines bending consist of a first pair fold lines perpendicular cross-if in the center geometric portion laminating, aimed sensitively diagonal, in its most cercacas center serves determine a fold of the sheet dihedral concavo, while in its end portions determine a fold of the sheet dihedral convexo; bending by line cross, passing through said geometric center portion laminar and both sides determined this sendos folds of the card in dihedral convexo; and four seconds line pairs bending, each of which is born in the extent that an rama the first couple of lines fold changing the meaning of the fold of dihedral convex, so that each line fold par arrives perpendicular to a respective edge of portion laminating, determining on it a fold in dihedral concavo, all this being so designed that grabbing the card for their central longitudinal end portions and starting from the folded position thereof, enough to perform move like to open a book to achieve total deployment of the card, while doing the opposite then move, or is closing of a book, automatically folds the sheet with a single movement. (Machine-translation by Google Translate, not legally binding)