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Apparatus for forming a hinged or clamshell type carton from a paperboard blank includes a carton forming die for receiving the paperboard blank, a movable frame for transferring the carton blank from the stack into registration over the die, and a reciprocating plunger mounted above the die for for

Apparatus for forming a hinged or clamshell type carton from a paperboard blank includes a carton forming die for receiving the paperboard blank, a movable frame for transferring the carton blank from the stack into registration over the die, and a reciprocating plunger mounted above the die for forming the carton. The blank is formed into a finished carton in one simple harmonic motion. The movable frame includes a number of vacuum assisted suction cups for lifting the carton blank from the stack and at least a pair of gathering rollers which cooperate with a pair of pivoting blades mounted adjacent the die to fold and gather the hinge of the carton blank as the blank is positioned and pressed into contact with the die. A pair of inverted “T”retaining bars, disposed on the die adjacent the carton hinge, prebreak glue tabs on the carton and capture and retain the wall panels of the carton when the blank is pressed into registration with the forming die. The blades and “T”bars also accurately locate and position the carton blank with respect to the die. A stacking cage is disposed beneath the carton forming die to receive and retain a plurality of the erected and folded cartons in a vertically stacked, nested arrangement.

대표청구항 ▼

Apparatus for forming a carton from a paperboard blank or the like, the carton having two sections, each section including at least a base panel, wall panels attached to the base panel, and corner panels formed at the corners of the wall panels, the two sections separated by an articulated hinge, an

Apparatus for forming a carton from a paperboard blank or the like, the carton having two sections, each section including at least a base panel, wall panels attached to the base panel, and corner panels formed at the corners of the wall panels, the two sections separated by an articulated hinge, and tab panels formed adjacent the hinge comprising: a carton-forming die for receiving said paperboard blank, said die including: means for prebreaking said articulated hinge of said carton blank, said hinge prebreaking means accurately locating said carton blank when said blank is placed in contacting registration with said die; and means for erecting and retaining selected panels of said carton during subsequent folding; means for sequentially feeding a carton blank from a stack into contacting registration with said carton-forming die, said feeding means including: means, cooperating with said prebreaking means of said die, for folding and gathering said articulated hinge when said carton blank is placed in contacting registration with said die; a reciprocating plunger for forcing said gathered carton blank into said die to fold and erect said wall panels of said carton; and means, disposed beneath said carton-forming die, for receiving and retaining a plurality of said erected and folded cartons in a vertically stacked arrangement, said cartons being nested within one another.