Abstract: A universal packer unfolds folded open side container blanks into fully opened containers and side loads them with complements of articles. The blanks are metered by a supply station and are propelled downstream to an unfolding station. The container flaps are spread apart, and expander arms enter the interior of each blank, thereby starting to unfold it. Erector arms strike the partially opened blank at the trailing edge thereof and push the trailing edge downward relative to the blank leading edge, thereby continuing the unfolding process. Drop lug assemblies emerge from under the blank trailing panel and pivot from a horizontal to a vertical attitude while in contact with the blank trailing panel, thereby completely unfolding the blank. Simultaneously with blank unfolding, a pair of grouper mechanisms forms the complements from a mass of the articles. The complements are propelled downstream in unison and aligned with the open containers.

Abstract: Apparatus is provided for opening folded open side carton blanks. The apparatus includes a first conveyor system for stripping blanks from a supply thereof at a first speed and for propelling the blanks downstream to a second conveyor system operating at a second speed greater than the first speed to accelerate the blanks and propel them to an unfolding station. The carton lower layer flaps are bent angularly downward. A pair of paddles having inclined leading edges rotate in horizontal planes to penetrate the space between the carton upper and lower layers and to lift the upper layer above the lower layer. The paddles also have bottom surfaces for holding the blank lower layer downwardly. The paddle tips travel at a faster speed than the second conveyor, so the tips slide forwardly to contact and push the blank leading panel forwardly to further unfold the flank.

Abstract: A case packer for loading open side cases and trays with generally upright articles includes apparatus for controlling the location of the case flaps during the loading operation. A pair of doors is interposed in the path of the articles being loaded. The articles contact the doors, which swing open to push the side flaps out of the way. A plow-like strip is employed to control the location of the case bottom flap. The case blanks are stored in generally vertical stacks in an open-bottom hopper. The blanks are folded and supported so that pulling the lowest blank downwardly partially unfolds the blank before it is deposited onto a conveyor. The conveyor completes the unfolding process while transporting the case to the article loading station.