Stand-up pouches fail on the shelf for a reason that begins at the filling station: asymmetric product load during filling causes the bottom gusset to fold unevenly, and the pouch leans or tips once cased. This machine targets heavy-fill and dense-product applications—frozen fruit, legumes, hardware, pet treats—where the product mass amplifies any gusset asymmetry. A dual-side gusset guide holds both bottom folds open and parallel through the entire fill cycle, and the