초록 ▼

A machine for forming a variety of different sturdy, stackable three-part fiberboard containers having a depth dimension greater than their width dimension, and which are suitable for holding bags filled with liquid. The machine includes a slidable, removable mandrel which cycles between a fiberboar

A machine for forming a variety of different sturdy, stackable three-part fiberboard containers having a depth dimension greater than their width dimension, and which are suitable for holding bags filled with liquid. The machine includes a slidable, removable mandrel which cycles between a fiberboard hopper area and a container forming compression area. Each of two side bins provides a fiberboard end panel which comes into contact with independently slidable edge picks on the mandrel. Just before the mandrel cycles forward, the edge picks push the fiberboard end panels forward where they are bent by the action of two folding elements. Meanwhile, a fiberboard body matt is brought into position in front of the retracted mandrel from an overhead feed unit. Adhesive material is sprayed onto selected parts of the body matt as it is placed into position in front of the mandrel. As the mandrel cycles forward, the body matt is bent over into a C-shape and the now-folded end panels are pushed into close association with the middle of the body matt. A set of guides and plows bends the body matt flaps over the end panels forming sturdy corners. The compression plates loosely surround the bent fiberboard pieces in order to avoid early adhesion until the mandrel is fully extended forward bringing the fiberboard pieces into proper position. Once positioned, the compression plates collapse around the fiberboard pieces forming a finished container. The finished container is then displaced as the machine cycles back to form another container.

대표청구항 ▼

[ I claim:] [1.] An improvement to an apparatus for forming a bliss-style container having an elongated removable mandrel movably mounted on a path, an overhead feed located at approximately the middle of said path for supplying a first part of the container to be formed into said path, said feed in

[ I claim:] [1.] An improvement to an apparatus for forming a bliss-style container having an elongated removable mandrel movably mounted on a path, an overhead feed located at approximately the middle of said path for supplying a first part of the container to be formed into said path, said feed including a means for applying adhesive to certain defined areas on said first container part, hopper means along said path on both sides of said mandrel for supplying, respectively, second and third parts of the container to be formed to the sides of said mandrel prior to forward motion of said mandrel, and a plurality of compression plates along said path downstream from said feed, the improvement comprising:a. means for advancing said second and third parts relative to said mandrel prior to forward motion of said mandrel located on either side of said mandrel;b. means for pre-folding leading edges of said second and third parts after advancement relative to said mandrel, said pre-folding means being located between said hopper means and said overhead feed; andc. at least one adjustable closable end door provided at the end of the path near the compression plates for pressing the ends of the container parts together, whereby the leading edges of said second and third parts are adhered to the inside of the middle of said first part forming the bottom corners of the container.