Abstract: Disclosed is a gluing device including a reservoir tank of liquid glue; an applicator roll partially immersed in the liquid glue; a doctor roll for adjusting a thickness of the liquid glue adhered to the applicator roll to become uniform; and a pair of glue dams for regulating a width of the liquid glue adherable to the applicator roll. The gluing device is configured to apply the adhered liquid glue on the applicator roll to a corrugated medium of a corrugated paperboard sheet. Each of the glue dams includes a pair of dam units located in spaced-apart relation to each other in a width direction of the applicator roll. The pair of dam units are configured to form a glue-uncoated region interposed between the pair of dam units on an outer peripheral surface of the applicator roll so as to correspond to a trimming region of the corrugated paperboard sheet.

Abstract: A corrugated paperboard box making machine, which includes: a slotter for slotting a corrugated paperboard sheet to form slots; a die-cutter disposed downstream of the slotter, the die-cutter including a die cylinder with a punching die and an anvil cylinder; a cutting blade for cutting, in cooperation with the anvil cylinder, the corrugated paperboard sheet slotted by the slotter, into two small-size corrugated paperboard sheets, along a direction perpendicular to the conveyance direction; and a displacement mechanism for displacing the cutting blade as to allow the cutting blade to be selectively set in a cutting position and a non-cutting position.

Abstract: An automatic inspection device for a corrugated paperboard machine includes comprises a position setting section for setting movable members to positions within moving ranges; a control section for driving each of the drive motors at a given rotational speed so as to allow a respective one of the movable members to be moved within a corresponding one of the moving ranges; a current detection section for detecting a drive current being supplied to each of the drive motors when the drive motor is driven at the given rotational speed; and a current determination section for determining whether the drive current of each of the drive motors exceeds a given threshold. The automatic inspection device is configured to, when the current determination section determines that the drive current of a specific one of the plurality of drive motors exceeds the given threshold, detecting that a defect occurs in the movable member.

Abstract: Disclosed is a sheet stacking apparatus which includes: a leading-edge regulating member configured to be positionally adjustable depending on a length of a plurality of corrugated paperboard sheets; a sheet stopper installed in the leading-edge regulating member in such a manner as to be movable with respect to a contact surface of the leading-edge regulating member reciprocatingly between a first position and a second position, and contactable with a leading edge of the corrugated paperboard sheet to be stacked in the hopper section; a detection section disposed upstream of the hopper section, and configured to detect a passing of each of the corrugated paperboard sheets; and a synchronization control device configured to reciprocatingly move the sheet stopper according to a detection signal, in such a manner as to allow the leading edge of the corrugated paperboard sheet to come into contact with the sheet stopper.

Abstract: Disclosed is a single facer for producing a plurality of types of single-faced corrugated paperboard sheets having different flute configurations. The single facer of the present invention comprises: a plurality of corrugating roll pairs; a plurality of cartridges each pivotally supporting a pair of corrugating rolls arranged in an up-down direction in a respective one of the corrugating roll pairs, each of the cartridges being selectively serving as an operational cartridge supporting one of the corrugating roll pairs located in an operational position, and a rest cartridge supporting one of the corrugating roll pairs located in a rest position; and a single facer body having a frame structure internally formed with a transfer space for the cartridges, wherein the operational cartridge is disposed above the rest cartridge in such a manner that the operational cartridge is supported from therebelow by the rest cartridge.

Abstract: The corrugated paperboard sheet feeding apparatus comprises: a sheet feeding table; a front guide for regulating a front end of a corrugated paperboard sheet; a back guide for regulating a rear end of the corrugated paperboard sheet; and a guide element for separating the corrugated paperboard sheets so as to form a plurality of separate groups, wherein the guide element includes: a first guide element formed in the front guide to have a first separation guide surface; and a second guide element formed in the back guide to have a cutout portion, and a second separation guide surface, and wherein the cutout portion of the second guide element is formed in such a manner that an amount of concavity thereof is greater than an amount of protrusion of the lower edge of the first separation guide surface of the first guide element.

Abstract: A sheet feeder of a corrugated paperboard box making machine includes a sheet feed table, feed rolls, an adjusting mechanism, a main unit, and a backing roller. The adjusting mechanism holds support plates pivotally supporting both ends of a first feed roll opposed to a second feed roll having an axis fixed to the main unit so as to allow an axis of the first feed roll to move with respect to the main unit. The support plates support a first backing roller via a connecting member connecting the support plates so that the first backing roller contacts with an outer peripheral surface of the first feed roll.

Abstract: The present invention is a cardboard sheet batch division device for dividing batches, disposed on the downstream side of a batch-forming device for separating loaded cardboard sheets and forming batches of a predetermined sheet count. The cardboard sheet batch division device for dividing batches comprises: a transfer conveyor for transferring batches formed by the batch-forming device in a predetermined transfer direction; and batch division means furnished with two separating members respectively contacting the leading edge portion and the trailing edge portion of a batch on the transfer conveyor, for dividing the batch into two sub-batches, upper and lower, by moving the two separating members relative to one another in a direction parallel to the predetermined transfer direction.

Abstract: Provided is a corrugated paperboard sheet printing device which includes a conveyance device for conveying a corrugated paperboard sheet fed out from a sheet feeding device, while suckingly holding the sheet; a plurality of printing units for printing the sheet through a series of printing processes; an information generator for generating basis weight information indicative of a basis weight of a corrugated paperboard sheet in each order; a storage device for storing therein a plurality of correction information for correcting a plurality of printing timings at each of which a respective one of the plurality of printing units performs the printing process on the sheet, in association with the basis weight information; and a controller for, based on the correction information, correcting the printing timing in each of the printing units, and causing the printing unit to operate according to the corrected printing timing.

Abstract: The present invention provides a corrugated sheet manufacturing apparatus (1) which includes a single facer (8), a double facer (14), and a cutter machine (16). The single facer includes a flute pitch calculation unit for calculating and setting a value of the flute pitch of the medium in such a manner that the given cut length for the double-faced corrugated sheet becomes equal to an integral multiple of the flute pitch of the medium; a flute pitch detection unit for detecting a flute pitch of the single-faced corrugated sheet; and a brake controller (44) for adjusting a tension of a liner being fed into the single facer to allow the detected flute pitch of the single-faced corrugated sheet to become equal to the set flute pitch.

Abstract: A folder gluer for folding a cardboard sheet having first through fourth panels connected through connecting portions and a glue tab and joining the first and fourth panels at the glue tab is disclosed. The folder gluer includes a pair of pressing members movable relative to one another in a cardboard sheet width direction perpendicular to a cardboard sheet feed direction for pressing the connecting portions of the first and fourth panels which are being folded, a detector disposed upstream in the feed direction from the pair of pressing members for detecting a passage of the cardboard sheet being fed in the feed direction and generating a detection signal, and a controller for determining, based on the generation of the detection signal from the detector, a timing at which the pair of pressing members are caused to move relative to one another and press on the connection portions of the first and fourth panels after the first and fourth panels are folded to 90° and before being folded to 180°.

Abstract: Disclosed is a corrugated paperboard box making machine, which comprises: a slotter for slotting a corrugated paperboard sheet to form slots, a die-cutter disposed downstream of the slotter, the die-cutter including a die cylinder with a punching die and an anvil cylinder; a cutting blade for cutting, in cooperation with the anvil cylinder, the corrugated paperboard sheet slotted by the slotter, into two small-size corrugated paperboard sheets, along a direction perpendicular to the conveyance direction; and a lifting and lowering mechanism for lifting and lowering the cutting blade in such a manner as to allow a position of the cutting blade with respect to a corrugated paperboard sheet being passing through the anvil cylinder to be changed between a cutting position where the cutting blade is permitted to cut the corrugated paperboard sheet, and a non-cutting position where the cutting blade is precluded from cutting the corrugated paperboard sheet.

Abstract: Provided is a corrugated paperboard box making machine which comprises: a cutting device for cutting one corrugated paperboard sheet into a plurality of small-size corrugated paperboard sheets along a direction perpendicular to a predetermined transport direction; a folder-gluer for bending and gluing each of the cut small-size corrugated paperboard sheets; a counter-ejector for stacking the glued small-size corrugated paperboard sheets to form a batch of the small-size corrugated paperboard sheets; and an inter-sheet spacing device for spacing the small-size corrugated paperboard sheets apart from each other, between the folder-gluer and the counter-ejector.

Abstract: A counter ejector of cardboard sheet box-making machine is disclosed. A front contact plate contacting cardboard sheets is movable in a feed direction. A spanker is disposed to face the front contact plate in the feed direction, and contacts the back edge portion of the cardboard sheet, aligning the sheet edge portions. Ledges separate cardboard sheets loaded between front contact plate and the spanker, forming a batch of a predetermined number of sheets. A transfer conveyor transfers batches in a transfer direction, which is the same direction as the feed direction. An elevator is furnished with a table, and carries batches from the height at which the front contact plate and the spanker are disposed to the height at which the transfer conveyor is disposed. The table is moved by the same amount and in the same movement direction as the movement of the front contact plate.

Abstract: Provided is a corrugated paperboard sheet printing device which includes a conveyance device for conveying a corrugated paperboard sheet fed out from a sheet feeding device, while suckingly holding the sheet; a plurality of printing units for printing the sheet through a series of printing processes; an information generator for generating basis weight information indicative of a basis weight of a corrugated paperboard sheet in each order; a storage device for storing therein a plurality of correction information for correcting a plurality of printing timings at each of which a respective one of the plurality of printing units performs the printing process on the sheet, in association with the basis weight information; and a controller for, based on the correction information, correcting the printing timing in each of the printing units, and causing the printing unit to operate according to the corrected printing timing.

Abstract: A printer using ink jet printing technology to print one or more colors on a sheet for use in a box is described. The printer has a feeder, a transport mechanism for moving the sheet the print head, and a stacker to receive the printed sheet. Differential air pressure is applied by a suction box disposed in proximity to a conveyer belt for transporting the sheet. The suction box may sized so that the sheet may be oriented with a long dimension in the direction of feeding. Where multiple print heads are used, the print heads overlap in the direction transverse to the motion of the sheet so that an image larger than a print head may be produced. Two printing mechanisms disposed opposite each other may be used to print two sides of a sheet.

Abstract: A folder gluer for conveying a cardboard sheet and folding up the cardboard sheet from a deployed state thereof is disclosed. The folder gluer comprises two flat belts including a first belt and a second belt arranged in parallel for conveying a cardboard sheet, two pulleys provided at a starting part or a terminal part in a conveying direction of the folder gluer for respectively driving the first and second flat belts by friction forces, two motors for respectively driving the pulley for the first belt and the pulley for the second belt, a sensor device for respectively detecting the speeds of the first belt and the second belt, and a control device for controlling at least one of the two motors such that a difference in the speeds of the first belt and the second belt detected by the sensor device becomes zero.

Abstract: The present invention is directed to providing an apparatus capable of transferring a sheet while reducing wear and using a relatively small driving force. The present invention is also directed to providing an apparatus capable of effectively obtaining a vacuum suction force with a simple structure.

Abstract: A printing machine includes a transfer device including a conveyor having suction holes formed therethrough for transferring cardboard sheets one by one, a suction device for applying a suction force on one of the two surfaces of each of the cardboard sheets, which one of two surfaces faces the conveyor, and ink jet heads located to face the other of the surfaces of each of the cardboard sheets to be spaced apart therefrom. The ink jet heads are located in such a manner that a desired distance is maintained between tips of the ink jet heads and the other surface to be printed and include ink jet nozzles from each of which ink is jetted out toward said the other surface. The ink jet heads have skirts located upstream and downstream of the transferring direction of the cardboard sheets in such a manner that the skirts extend from the ink jet heads toward the other surface and have a width which covers the ink jet nozzles so as to form a partition in a space between the ink jet nozzles and the other surface.

Abstract: Disclosed is a scorer apparatus for scoring a surface of a corrugated paperboard sheet (DS) being continuously fed along a feed line. The scorer apparatus comprises a plurality of scorers each adapted to be displaced to a given position in a crosswise direction of a corrugated paperboard sheet, and made up of a pair of upper and lower segments (10, 12) at least one of which is adapted to be displaced in a vertical direction during the scoring, and displacement-amount control means operable to control respective vertical displacement amounts of the scorers individually on a scorer-by-scorer basis during the scoring. The scorer apparatus of the present invention can adequately form a plurality of score lines in one lot and through a single-step scoring process.