Abstract: A machine for forming open ended cartons from flat die cut blanks of flexible material. The machine includes a magazine adapted to contain a supply of the blanks, and first, second and third forming stations through which the blanks are successively shifted by automatically operable transfer mechanisms. The blanks are progressively folded as they progress through the forming stations. At a final stage in the forming process, adhesive is selectively applied to the undersides of exposed side flaps, and these side flaps are then folded to produce the desired end product. At various stages during the forming process, the partially erected blanks are supported both internally and externally in order to avoid deformation or collapsing of open ends, and to insure precise bending along fold lines.

Abstract: A machine for forming a precut paperboard blank into carton form with the lid extending vertically from its related back wall in unfolded condition. The forming means includes spring pressed rollers acting in cooperation with a mandrel to fold the carton side panels from horizontal to vertical and other means to cause interlocking of end tabs on the front and back panels with slits in the end panels. The structure also includes vertical slots enabling the unbent end flaps on the lid to pass downwardly therethrough as the carton is formed.

Abstract: A machine for sealing the lid to the body of a paperboard carton. The lid has two end flaps and one front flap. A carton is fed into the sealer back side first. Glue is applied to the oppositely disposed end flaps. The carton is raised by an elevator to the level of another glue applying device located above the entrance to the sealer. A second carton is inserted on the lowered elevator. Both glue applying devices are then actuated simultaneously so that glue is applied to the end flaps of the second carton and the front flap of the first carton.Thus in two stages, glue is applied to the three flaps of each carton. The cartons are progressively pushed upward by successive cartons placed on the elevator. Pressure is applied to the flaps after receiving the glue so that proper sealing occurs during the time the cartons are moving upward step by step through the pressure applying means.