Abstract: To get from a sheet of cardboard an element including an assembly of parts suitable for forming a block with conventional detachable sheets and including a conventional pen, the die-cutting and simultaneous creasing of the sheet lead to form: a) a first rectangular or square element intended for the application of a block of paper; b) a second rectangular element on a first side of the first element and of a width equal to the thickness of the block; c) a third rectangular or square element on the adjacent side of the second element and is intended to cover notebook; d) a fourth rectangular element on a second side of the first element, contiguous and of width equal to the thickness of the block; e) a fifth rectangular element, contiguous to the fourth element and of a height suitable for covering the head of the block of paper.