Folding upper fixed wing

A method includes folding a front upper flap of a carton blank, folding a rear upper flap of the carton blank, and transferring the front upper flap and the rear upper flap in a folded state into a gap between a pair of guide rails. The method includes interlocking a front upper flap into a front can in a package of products, interlocking a rear upper flap into a rear can in a package of products, and wrapping a carton blank around a package of products to pack the package of products together. 一种方法包括折叠纸箱坯件的前上折板，折叠纸箱坯件的后上折板，并将处于折叠状态的前上折板和后上折板传递到一对导轨之间的间隙中。该方法包括将前上折板互锁到一包产品中的前罐中，将后上折板互锁到一包产品中的后罐中，以及将纸箱坯件包裹在一包产品周围以将该包产品包装在一起。