| 摘要 |
A bottom folding assembly is used to form a package having a bottom wall with in-folded gusset tips. The assembly is configured to infold the bottom gusset panels, leading panel and trailing panel of a carton and to in-fold the gusset panel tips of the bottom wall for forming a sealed carton bottom. The bottom folding assembly includes a rotating drive shaft mounted transverse to a turret plane and spaced from a periphery of a turret path. A pair of opposing rotating members are disposed on either side of the rotational path of the turret and are operably mounted to the drive shaft. The rotating members are configured to rotate in a plane that is transverse to the turret plane. A pair of retaining members are operably mounted to the rotating drive shaft and are configured to rotate with the shaft. The retaining members are configured to rotate into an interior of the package and engage the gusset panel tips from the interior of the package. When a carton is positioned on the mandrel and passes the folding assembly, the opposing rotating members contact the gusset panels, urging the gusset panels inwardly. Concurrently, the retaining members engage the gusset tips to prevent the gusset tips from folding inwardly with the gusset panels and folding the gusset panel tips in a direction opposite of the gusset panels. A form, fill and seal machine having the bottom folding assembly is also disclosed.
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