ES291715U - Letter-envelope with window (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Letter-envelope with window, which is of the type obtained from a continuous band equipped with perforated side strips for dragging during printing, which can be removed at the end of the printing by means of pre-cut longitudinal lines, and in which they also establish transversal pre-cut lines for independence between modules or letter-envelopes, establishing in each module two sectors aligned longitudinally in the band, one that has to constitute front and back of the envelope, provided with the corresponding window, and another the insert, defining between the latter and the perforated lateral strips longitudinal necklines that narrow this sector with respect to the constituent of the envelope, essentially characterized in that each module incorporates three lines of transversal folding determinants of four sectors, of which three of them are dimensionally identical and the fourth slightly shorter, with the peculiarity that the necklines these affects only this fourth sector, having foreseen the existence of a marginal fringe of tail established only on the front or receiving area of data of the module, specifically in correspondence with the free edges of its three dimensionally equal sectors, and the closure is carried out by means of two successive bends in the same direction, the first of the insert on the envelope and the second of this set on itself, while for its subsequent opening a parallel precut line is established, inside and close to the tail strip, and two parallel lines that frame the transversal folding line that relates the sectors corresponding to the envelope and the insert. (Machine-translation by Google Translate, not legally binding)