Procedure of forming notebooks with folded sheets by their lateral edges, using long strips of a washable material, such as cloth, and that when being wrinkled does not produce sharp edges and by itself it is released again to its primitive state, characterized by marks in the direction perpendicular to the greater side of the strip, and in accordance with the figurative boxes that have previously been printed on a single face of the strip, according to the expression (2n 1), in which n is an odd number, equally spaced from each other and alternatively folded with respect to the acute angle of the central fold, on whose side the acute angles of the adjacent folds must be formed, by bringing the incoming folds and the minor edges of the strip to rest on the edge of said inner angle of the central fold and because the assembly thus formed is sewn to said central fold by a line immediately and parallel to this fold, so that they are caught by the seam l said inward pleats and the minor end edges on the strip. (Machine-translation by Google Translate, not legally binding)
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