A corrugated plastic box and a method for manufacturing a corrugated plastic box from a blank are provided. The method includes the steps of forming rounded edge seals on the perimeter edges of the blank, pre-sealing portions of the blank—including providing air vents to allow trapped air to escape during the pre-sealing process—to form a plurality of areas in which major and minor flap slots and a glue tab are desired, ultrasonically scoring the blank to form a plurality of flap score lines, and cutting the blank through the plurality of pre-sealed flap slots and glue tab, leaving a sealed edge.

Methods, apparatus, and systems increase converting accuracy and consistency of corrugated articles of manufacture such as blanks, intermediates or converted structures to minimize unintended gap variations, fishtail variations and visual discord as well as to minimize unintentional loss of strength due to conversion of such articles. The constitution of converted articles formed from a corrugated board blanks according to the invention comprises at least one intelligently located score, slit or slot (hereinafter collectively “registered modification”) based upon knowledge of the corrugated board's fluted medium, including the absolute relative location of at least one fluted medium feature and/or the fluted medium geometry, such as its pitch.

A method for manufacturing an object, such as a tray includes providing an unfolded sheet; providing a straight score line in the unfolded sheet for providing a division between a wall part and a flange part; folding the flange part of the sheet relative to the wall part along the score line to provide an angle larger than 45° between the flange part and the wall part; providing a plastic foil; heating the plastic foil; pressing the heated foil on the sheet at the side provided with the score line and covering at least part of the wall part and the flange part; the sheet having at least one U-shaped cut interrupting the score line. The free ends of the U-shaped cut are positioned on the score line. The bridging part of the U-shaped cut is positioned in the flange part.

A method for manufacturing an object, such as a tray includes providing an unfolded sheet; providing a straight score line in the unfolded sheet for providing a division between a wall part and a flange part; folding the flange part of the sheet relative to the wall part along the score line to provide an angle larger than 45° between the flange part and the wall part; providing a plastic foil; heating the plastic foil; pressing the heated foil on the sheet at the side provided with the score line and covering at least part of the wall part and the flange part; the sheet having at least one U-shaped cut interrupting the score line. The free ends of the U-shaped cut are positioned on the score line. The bridging part of the U-shaped cut is positioned in the flange part.

The invention is directed to straight, consistent body scores on plastic corrugated boxes and a process for making the body scores.

A slotter apparatus includes a slotter knife rotatable in a same direction as a conveyance direction of a sheet that is conveyed on a conveyance path, the slotter knife having a cutting edge, for forming a notch groove in the sheet, on an outer periphery of the slotter knife. A protruding part protrudes outward from the cutting edge at one end of the slotter knife, the protruding part cutting an end part of the notch groove by piercing the sheet. A drive device that drives the slotter knife so as to rotate. A control device that, at least when the protruding part passes through from the upper surface of the sheet, controls the relative relationship between the circumferential velocity of the slotter knife and the conveyance velocity of the sheet so that the protruding part does not interfere with the end part.

An edge-cutting device performs edge-cutting for cutting away trimmings of a corrugated cardboard sheet toward the front and back when switching between orders is to be performed in a corrugating machine. This edge-cutting device has an edge-cutting knife provided to project from the outer circumference of a cylinder having an axis disposed in the width direction of the corrugating machine; and a control device that, when switching between orders is to be performed, controls the edge-cutting device to perform a first edge-cutting process for edge-cutting trimming of an old order at the first rotation of the edge-cutting knife and a second edge-cutting process for edge-cutting trimming of a new order at the second rotation. The control device includes a calculation device for calculating the order switching time, and a variable control device for variably controlling the time interval between the first edge-cutting process and the second edge-cutting process.

An edge-cutting device performs edge-cutting for cutting away trimmings of a corrugated cardboard sheet toward the front and back when switching between orders is to be performed in a corrugating machine. This edge-cutting device has an edge-cutting knife provided to project from the outer circumference of a cylinder having an axis disposed in the width direction of the corrugating machine; and a control device that, when switching between orders is to be performed, controls the edge-cutting device to perform a first edge-cutting process for edge-cutting trimming of an old order at the first rotation of the edge-cutting knife and a second edge-cutting process for edge-cutting trimming of a new order at the second rotation. The control device includes a calculation device for calculating the order switching time, and a variable control device for variably controlling the time interval between the first edge-cutting process and the second edge-cutting process.

A box making machinery and a corrugated board running register method, include a feeding unit, a processing apparatus which carries out processing on a corrugated board, a running register device which adjusts the processing position of the processing device in a carrying direction of the corrugated board, and a control device which controls the running register device, wherein the control device includes a carrying misalignment amount calculation unit which calculates the carrying misalignment amount of the corrugated board from the feeding unit to a preset predetermined carrying position, and a control unit which adjusts the processing position of the corrugated board to be processed next using the running register device on the basis of the carrying misalignment amount after processing of the corrugated board has finished.

A box making machinery and a corrugated board running register method, include a feeding unit, a processing apparatus which carries out processing on a corrugated board, a running register device which adjusts the processing position of the processing device in a carrying direction of the corrugated board, and a control device which controls the running register device, wherein the control device includes a carrying misalignment amount calculation unit which calculates the carrying misalignment amount of the corrugated board from the feeding unit to a preset predetermined carrying position, and a control unit which adjusts the processing position of the corrugated board to be processed next using the running register device on the basis of the carrying misalignment amount after processing of the corrugated board has finished.