An apparatus for forming a box or bag that is made of a substrate strip which includes a winder having a mandrel and posts that extend from the mandrel in a direction parallel to a winding and translation axis that rotate together as a unit around the translation axis. The apparatus also has a feeder that includes precursors and a gathering head used for forming the precursors into the strip and feeding the strip to the winder. A motor adjusts the feeder's angle relative to the winder in response to instructions from the controller based on the dimensions of the box or bag. This causes controlled overlap between adjacent windings of the strip on the posts. As the mandrel rotates, the posts draw the strip and wind the strip along a spiral having a length in excess of the depth. Zero waste of precursors is made possible by cutting the substrate perpendicular to its length and folding over the box or bag ends to form an angled seam with respect to the sides of the box.

The method includes the step of pulling the corrugated board along hot plates by means of an upper flexible member and a lower flexible member driven by two electric motors. By at least one electric parameter of the drive motor of the lower flexible member, the correct operation of the traction device and in particular the correct ratio of the linear feeding speeds of the two flexible members is checked. The method provides an iterative check of the controlled electric parameter and a possible correction of the speed of the flexible members to maintain the desired speed ratio.

A plant for producing corrugated cardboard. The plant includes an arrangement for producing a corrugated cardboard web laminated on one side, the arrangement having a corrugating apparatus for generating a corrugated web, which has a corrugation, from a first material web, having a glue-applying apparatus for applying glue to tips of the corrugation of the corrugated web, and having a pressing apparatus for pressing a top web onto the tips, provided with glue, of the corrugated web. The plant furthermore has a severing apparatus which is arranged upstream of the corrugating apparatus and which serves for at least regionally severing the first material web in the transverse direction thereof.

A single facer comprises: a swingable frame supporting a press roll in such a manner as to allow a gap between one of a pair of corrugating rolls and the press roll to be changed; an adjusting screw contactable with a contact member coupled to the swingable frame; an encoder for detecting vibration of the press roll occurring during formation of a corrugated medium by the pair of corrugating rolls; and a control section for controlling drive of a motor for displacing the adjusting screw. The control section is configured to execute a first control processing of driving the motor until a magnitude of the vibration is reduced to a given value.

Provided are a humidifying device and a corrugating machine whereby release of heat from heated water is suppressed and a liner paper is humidified. A humidifying device for humidifying a surface liner paper affixed to a core paper via a starch glue has a liquid application roller for applying heated water to the surface liner paper, provided downstream from a preheater for heating the surface liner paper prior to the affixing; and a chamber facing the peripheral face of the liquid application roller and provided with an internal space to which the heated water is supplied. The chamber further has an opening for supplying the heated water to the peripheral face of the liquid application roller, and is formed so that the length of the opening in the direction orthogonal to the axial direction of the liquid application roller is less than the diameter of the liquid application roller.

A cardboard sheet defect detection device is for detecting a defect of a single-faced cardboard sheet guided by a guide member outside a corrugated core. The cardboard sheet defect detection device includes an irradiation device that irradiates the core with light at an irradiation angle inclined as much as a preset predetermined angle with respect to the single-faced cardboard sheet; an imaging device that images an irradiated portion of the light in the core; an image processing device that defines a bright section or a dark section along a transport direction of the single-faced cardboard sheet, based on a captured image captured by the imaging device; and a determination device that determines a quality by comparing a length of the bright section or a length of the dark section which is defined by the image processing device with a preset determination value.

A device for cardboard storage and removal for a bridge in a corrugated cardboard production line includes a bridge over which a conveyor system for conveying the single-sided laminated corrugated cardboard web is arranged. The exit end of the conveyor system for conveying the single-sided laminated corrugated cardboard web is provided with a clamping and cutting unit and a movable cardboard storage carriage unit is provided under the conveyor system for conveying the single-sided laminated corrugated cardboard web, under which conveyor system a conveyor belt system is provided in the bridge, and in the bridge an opening is provided, under which a waste cardboard collecting carriage is provided. The movable cardboard storage carriage unit stores the cardboard by means of cardboard storage rolls, which retain the single-sided laminated corrugated cardboard web flat on the bridge. In the event that a splicing defect is detected, the defective piece is cut out by the clamping and cutting unit and ejected by the conveyor belt system to the waste cardboard collecting carriage through the opening. Hence, it follows that productivity is improved.

A corrugated cardboard plant comprises a corrugated cardboard web production assembly for producing a corrugated cardboard web; a register mark cutting device, disposed downstream of the corrugated cardboard web production assembly, for cutting the corrugated cardboard web into corrugated cardboard sheets; a register mark detection device, disposed upstream of the register mark cutting device, for detecting at least one register mark on the corrugated cardboard web; and a control assembly which is in signal connection with the register mark cutting device and with the register mark detection device, and depending on the at least one detected register mark actuates the register mark cutting device, while generating at least one register mark cut. The corrugated cardboard plant furthermore has a register mark cut position correction installation for the automatic correction of the position of the at least one register mark cut in relation to the at least one register mark in the case of an undesirable deviation of the position of the at least one register mark cut.

A conveyor device for conveying a single face corrugated web on a bridge is disclosed. The conveyor device includes a lower guide roller, around which the single face corrugated web is guided. The conveyor device further includes an upper pinching and conveyance nip formed by a pair of nip members in pressure contact with one another. At least one of the nip members is motor-driven. The pinching and conveyance nip is configured to pull the single face corrugated web upwards from the lower guide roller.

A corrugated board plant includes a corrugated board production assembly for producing a double-face laminated web of corrugated board, and at least one cutting assembly arranged downstream of the corrugated board production assembly, which has a cross-cutting device for producing sheets from the double-face web of corrugated board, and is capable of producing at least one identification sheet from the double-face laminated web of corrugated board, which is different from the sheets. The corrugated board plant further has a stack depositing area arranged downstream of the cutting assembly to stack the sheets and the at least one identification sheet in such a way as to form a stack, which is identifiable by means of the at least one identification sheet, in particular for further processing.