BOTTOM PRE-FOLDER FOR CARTON WITH FOLDED-IN GUSSET TIPS

摘要

A bottom prefolding assembly prefolds the bottom panels of a package having a bottom wall formed with in-folded gusset tips. The prefolding assembly infolds the bottom gusset panels, leading and trailing panels of a carton and in-folds the gusset panel tips prior to forming the sealed carton bottom. The assembly includes a drive, first and second folding arms configured to contact and inwardly prefold the lead and trailing panels and a forming arm movable with the first and second folding arms. The forming arm has a pair of pivotable finger elements mounted thereto. The finger elements each having a carton engaging portion to engage the panel portions that form the gusset tips and fold the panel portions in a direction opposite of the folding of the gusset panels.