Abstract: A packing laminate which is intended to be converted into packing containers is often provided with crease lines in order to facilitate folding and shaping. At the places where crease lines cross each other a multiple folding of the laminate takes place on conversion into packing containers which, among other things, means that small cracks are formed in the different material layers, so that the tightness of the packing container is put into jeopardy. In accordance with the invention, a packing laminate is proposed in which these difficulties are overcome by providing the laminate with specially designed auxiliary crease lines which in the region of the laminate, where the folding lines cross each other or meet, replace the (main) crease line guiding the folding line. The auxiliary crease lines are situated at such a distance from the main crease line that the folding line is not affected, that is to say, the folding line will after folding not coincide in any part with the auxiliary crease lines.

Abstract: A one-piece T-shaped carton blank is disclosed which is utilized to form a rectangular cross-sectional container having its top and bottom end panels sealed in a plane substantially perpendicular to its sidewalls. The carton blank is formed having a definite dimensional relationship between its end panels and side panels to provide improved nesting of multiple carton blanks upon paperboard sheet stock in an alternating inverted side-by-side relationship. A pair of end sealing tabs extend along the top and bottom edges of the blank side panels. One of the end sealing tabs is separated from the top end panel and from a side sealing tap to prevent tearing and to permit the complete welding of the side sealing tab up onto the top end closure panel of the carton blank. This separation of the end sealing tab in combination with displacement of the hinge line of the top end closure panel downward provides a liquid-tight corner seal for the carton.

Abstract: A coated paperboard container and a blank for constructing same are disclosed as including a body portion having a side seam flap secured adjacent the edge portion of one of four side panels and an upper end that is closed by a folded top end closure which includes closure panels having a construction that enhances foldability and sealing. Front and back triangular gable panels of the top end closure are each flanked by a pair of triangular fold-back panels that have different sizes than each other so as to facilitate folding of the sealed top end closure from a vertical position in a direction toward the smaller of the fold-back panels. The lower score line portions adjacent the smaller inner roof panel are formed wider than the other score lines so as to further enhance the folding of the top sealed panels in the direction of the gable side bearing the side seam flap upper extension.

Abstract: An improved multi-station machine is disclosed for assembling ring-type closures from generally cylindrical paperboard cylinders and generally circular paperboard discs. The machine employs a rotatable dial plate, carrying eight mandrels and an improved ring clamping system, which dial plate is incrementally rotated by an automatic indexer assembly relative to the various operating stations which consist of a ring feed station, a disc feed station, an adhesive dispensing station, a curling station, a grooving station and a closure ejecting station. Means are provided for controlling the operation of the various stations so that they operate in substantial synchronism with one another and with the rotatable dial plate. The improved disc feed station automatically feeds the lowermost disc from a stack of discs to a position over a ring on the dial plate and simultaneously forms a peripheral skirt on the disc and positions it in an open end of the ring.

Abstract: 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.

Abstract: A collapsible drum-type container is formed by scoring lines on a generally rectangular blank of fiberboard or the like so that the blank can be initially folded along one score line into two flat overlying panels. The longitudinal free edges of the panels are sealed together to form a flattened tube. The flattened tube is then opened and refolded along other score lines to provide a flat envelope having an upper open end and a closed lower end defined by an inwardly folded gusset panel between the two side walls of the refolded flattened tube.