Valve for packaging saquerºo. With priority of italian patent application no. 4319/61 and as a breakdown and transformation of spanish patents numbers 275421 and 279011 respectively (Machine-translation by Google Translate, not legally binding)

摘要

Valve for packaging saquerºo, characterized in that it comprises a first sheet that is part of a sack or container of flexible material, a window made in said first sheet and a second sheet whose edges surround said window and are fixed in contact with said first sheet around the entire contour of said second sheet except for a section of the distant edge of said window. (Machine-translation by Google Translate, not legally binding)