Use of a tray for conveying pouches for flexible containers and methods and machines using such tray

Use of a tray for conveying pouches for flexible containers, said tray comprising:

• a plurality of partitions that protrude from the base of the tray so as to form containment spaces between the partitions, said spaces configured for containing packs of pouches for flexible containers, said containment spaces being used to contain said packs of pouches in a direction that is transverse to said partitions, so that the pouches of each pack are stacked within each containment space with their edges facing the base of the tray, wherein said partitions are matched by respective first grooves on an opposite face of said base which is opposite with respect to a face from which the partitions protrude, each one of said first grooves extending within the respective partition so as to allow said tray to be nested in a second identical tray, by means of the insertion of the partitions of said second tray in said first grooves of said tray.