초록 ▼

An apparatus and method for forming flat cut carton blanks into erected cartons with debowed carton side panels is disclosed. The apparatus includes a forming head receiving and directing a carton blank through forming guides, side walls engaging and supporting the carton side panels that bend into

An apparatus and method for forming flat cut carton blanks into erected cartons with debowed carton side panels is disclosed. The apparatus includes a forming head receiving and directing a carton blank through forming guides, side walls engaging and supporting the carton side panels that bend into upright position relative to the carton bottom panel during descending movement through the forming guides. Presser fingers pivotally secured to the forming guides project inwardly into the forming head path. The presser fingers bend the side panels into cutout openings provided in the side walls to overbreak the side panels at fold lines between the carton side and bottom panels. An inclined surface with a sharp creasing edge abutting the fold lines enables the presser fingers to initially crease the fold lines and thereafter bend the carton side panels inwardly onto the inclined surface for controlled overbreaking movement. The height of the cutout opening allows each carton side panel to clear the upper periphery of the openings to prevent buckling. After debowing the side panels, the presser fingers engage the upper edges of the carton side panels to strip the erected cartons from the forming head during the ascending return stroke. Notches provided in the side walls serve to prevent interference contact of the presser fingers with the forming head.

대표청구항 ▼

In an apparatus for forming flat cut carton blanks into erect cartons having side panels attached to a bottom panel along fold lines therebetween, said apparatus including a forming head having opposed side walls, and reciprocating moving means enabling the forming head to receive and direct a carto

In an apparatus for forming flat cut carton blanks into erect cartons having side panels attached to a bottom panel along fold lines therebetween, said apparatus including a forming head having opposed side walls, and reciprocating moving means enabling the forming head to receive and direct a carton blank through a die into erected condition with the side panels of the carton engaging the side walls, the improvement comprising: (a) cutout openings formed in the side walls of the forming head allowing the erected side panels to bend inwardly from the fold lines; and (b) pressing means operatively positioned in the path of the forming head to engage and crease the fold line and direct the erected side panels inwardly into the cutout openings to a sufficient extent for overbreaking and debowing the carton side panels.