Container forming method and apparatus

摘要

Disclosed is a new machine for forming containers of the type described in U.S. Pat. No. 5,497,939 without the use of glue or nails. The machine utilizes a mandrel movably mounted on a path for oscillation between retracted and extended positions. As the mandrel cycles forward, it first receives two synthetic sidewalls and then a deformable body panel of the container to be formed. Then a set of moveable upper and lower rockers containing unique pressure mechanisms press tabs on the horizontally oriented portion of the wrap into corresponding locking slots on the ends of the sidewalls. When the mandrel is fully extended, pressure is applied to the tabs on the vertically oriented middle section of the wrap using a pair of hinge-mounted pressure plates fitted with unique biased brackets. The resulting container is removed from the machine, which is then ready to begin another cycle.