Marcahojas (Machine-translation by Google Translate, not legally binding)

摘要

Characterized because it consists of two pieces; a, and b, (figures-1-2-3). Piece a, built in any kind of material, (preferably transparent plastic), consists of a narrow and flat rectangle (2-fig-2, 5-fig-3) whose width is 5 mm, as this is the separation between lines alternatives in the generality of the editions, and thus facilitate reading. The aforementioned rectangle has a base that is crossed by one of the bolts of piece b (3-fig-3, 6-fig-2, 7-fig-1), around which it can rotate (angle (fig-5) ), to adapt to the first or last pages of the book in question. (Machine-translation by Google Translate, not legally binding)