Abstract: A carton shifting device for use in an automatic carton packing machine, comprises a disc supporting a plurality of downwardly extending mandrels. The mandrels are arranged in pairs with outwardly facing surfaces lying in a common plane. A groove is defined in each outer surface of the mandrel. The paired grooves are engageable by a pair of claws connected to a withdrawing bar for movement in the downward-like direction to strip carton blanks off the mandrels. The carton blanks drop on a table where they are pushed into two rows by a pushing bar. At the end of the rows a horizontal conveyor moves to convey the carton blanks in an orderly fashion. The conveyor comprises a chain with a plurality of spaced apart rectangular blanks. The blanks are spaced apart by the carton blank length with the width of each blank being equal to two carton blank widths so that two carton blanks can be conveyed between adjacent blocks.

Abstract: A folding device for imparting a folding habit to the opened top of a carton comprises a frame which is connected to a shaft for moving the frame upwardly and downwardly. A pair of squeezing plates are secured to the frame. The squeezing plates have oppositely tapering lower portions and parallel upper portions. A deforming plate having oblique edges is movable between the upper portions of the squeezing plates and is connected to the frame by a resilient mounting which permits upward relative movement of the deforming plate with respect to the squeezing plates. The lower edge of the deforming plate includes upwardly and outwardly extending edges for spreading opposite edges of a carton. The squeezing plates are used to squeeze opposite sides of the carton together so that the carton top can ultimately be closed.

Abstract: A device for bending down and sealing triangular lugs that are formed on the top of a cardboard carton includes a conveyor for moving cartons in a running direction with the cartons having outstretched lugs. A plurality of clamp sets are connected to the conveyor which each include a base plate to which is connected a vertically downwardly extending pushing plate that pushes the cartons. Two or more spaced apart clamp members are movable on the base plate for movement toward each other and away from each other. A driver on the base plate has a cam follower and cooperates with a clamping cam to move the clamp members together and apart. A hot air blower is provided for blowing hot air against the undersurfaces of the lugs and side surfaces of the carton which are partially fused. A push up bed is used to push a carton up between the clamp members to bend the lugs down to sides of the carton.

Abstract: An automatic carton packing machine comprising: a withdrawing device adapted to withdraw carton blanks having sealed bottoms and fitting mandrels vertically downwardly from said mandrels; a push-out device adapted for successively pushing out the carton blanks in the horizontal direction on a table; a conveyor device including bucket portions and arranged at a right angle to the direction of the pushing out and for accomodating the carton blanks in a row and plat portions formed at both sides of the bucket portions; a folding device adapted to fold the upper edges of the carton top along the folding line to impart a folding habit to the carton top; and a device for triangular lugs adapted for bending, after completion of the sealing of the carton top having the folding habit and withdrawal of the carton blanks from the bucket portions of the conveyor device; the triangular lugs of the carton top downwardly and bonding the same to the side surfaces of the carton.