1 2 3 Bottom (Lock Bottom)

It describes a manually assembled bottom with flaps folded in an ordered locking sequence. Request the exact sequence on a sample and confirm the final engagement point. Train packers from that approved construction, since a similarly named base may use different details.

Include a simple view of the fully engaged base in the packing instruction and trial repeated assembly with actual operators. Check the bottom before filling, especially when a product hides the lock. Revise an ambiguous flap shape rather than relying only on operator force.

Inspect the erected bottom for openings and compare them with the smallest loose contents. A bag, tray or other inner containment may be needed. Test the filled sample after handling, since engaging the bottom does not create a continuous sealed surface.

Compare them when manual bottom assembly becomes a meaningful step in your workflow. Use the same product and packing arrangement to evaluate erection consistency and support. Approve the chosen sample's actual bottom behavior instead of assuming the two mechanisms have equal performance.