Abstract: A device includes a tank for storing a glue solution; a roll having a surface for transferring the glue solution onto an area of a corrugating medium of a single-faced corrugated fiberboard sheet in the width direction; scraping members for regulating adhesion of the glue solution outside the area on the surface of the roll; a movement mechanism for moving the scraping members in the width direction; and a control device for setting, on the basis of the cutting width dimension with which the double-faced cardboard sheet is to be cut after passing the roll, the area to be a region in which margins in the width direction have been added outside positions of the side edges of the cutting width dimension, and for controlling the movement mechanism to dispose the scraping members at positions corresponding to the positions of the side edges of the glue application region.

Abstract: A web adhesive application device, adhesive application method, and the cardboard sheet manufacturing device are provided with: an adhesive liquid tank for storing an adhesive liquid; an adhesive application roll is configured for transferring the adhesive liquid to an adhesive application region adjusted according to a paper width of a bottom liner board to be glued together with a single face cardboard sheet; a doctor roller for adjusting the adhesive liquid to a set film thickness; scraping members in pressured contact with the surface of the adhesive application roll on the upstream side of the nip section with the doctor roller; and damming members in contact with the surface of the adhesive application roll on the upstream side of the nip section with the doctor roller in the rotation direction and on the downstream side of the scraping member contact positions in the rotation direction.

Abstract: A device for gluing of a double facer includes a glue bath containing glue; a gluing roll immersed in and coated with the glue; a doctor roll adjusting the glue on the gluing roll to a predetermined thickness, transferred to a single faced corrugated cardboard; a swing roll disposed at an upstream portion of a transferring direction of the corrugated cardboard; and a moving device that moves the swing roll in a direction that the single faced corrugated cardboard is wrapped around the gluing roll. The swing roll is wrapped around the single faced corrugated cardboard, and the number of flute tips of the single faced corrugated cardboard that are concurrently contacting with the gluing roll and applied with the glue is adjusted by moving only the swing roll in such a direction that crosses a sheet face of the single faced corrugated cardboard passing through the nip.

Abstract: A device includes a tank for storing a glue solution; a roll having a surface for transferring the glue solution onto an area of a corrugating medium of a single-faced corrugated fiberboard sheet in the width direction; scraping members for regulating adhesion of the glue solution outside the area on the surface of the roll; a movement mechanism for moving the scraping members in the width direction; and a control device for setting, on the basis of the cutting width dimension with which the double-faced cardboard sheet is to be cut after passing the roll, the area to be a region in which margins in the width direction have been added outside positions of the side edges of the cutting width dimension, and for controlling the movement mechanism to dispose the scraping members at positions corresponding to the positions of the side edges of the glue application region.

Abstract: A web adhesive application device, adhesive application method, and the cardboard sheet manufacturing device are provided with: an adhesive liquid tank for storing an adhesive liquid; an adhesive application roll is configured for transferring the adhesive liquid to an adhesive application region adjusted according to a paper width of a bottom liner board to be glued together with a single face cardboard sheet; a doctor roller for adjusting the adhesive liquid to a set film thickness; scraping members in pressured contact with the surface of the adhesive application roll on the upstream side of the nip section with the doctor roller; and damming members in contact with the surface of the adhesive application roll on the upstream side of the nip section with the doctor roller in the rotation direction and on the downstream side of the scraping member contact positions in the rotation direction.

Abstract: A swing roll 36 is arranged over a gluing roll 14 and is configured to be movable in the direction of the arrow, so that the number of flute tips of a single faced corrugated cardboard k that are to be concurrently in contact with the gluing roll 14 at a nip N between the gluing roll 14 and a pressure roll 20 can be adjusted, and an amount of glue to be applied to each flute tip m of the single faced corrugated cardboard k can be optimized. In addition, since the pressure roll 20 is arranged on the same horizontal level as the gluing roll 14, influence of a bend caused by the weight of the pressure roll 20 can be avoided and the glue can be applied evenly in the width direction. The single faced corrugated cardboard k is wrapped around the pressure roll 20 at the exit of a nip N to allow a splash s of glue to return to a glue bath 12. Additionally, this configuration makes the single faced corrugated board to leave the surface of the gluing roll at a constant point d.

Abstract: A double facer that fabricates a corrugated fiberboard and that includes heat plate units having thin walls aims at improving the heat conductive efficiency to fiberboard sheets in order to enhance responsibility to the setting temperature and concurrently avoiding thermal deformation of the heat plates due to a difference in temperature between the top surface and the bottom surface.

Abstract: A device for manufacturing a corrugated cardboard sheet includes a conveyor which conveys a corrugated medium and a liner, a starch applicator which is arranged along a conveying path of the corrugated medium and the liner and applies liquid starch to flute tops of the corrugated medium, a bonding unit which bonds the liner and the corrugated medium by placing the liner on the corrugated medium to which the liquid starch is applied and by heating and pressing the corrugated medium and the liner to gelatinize the liquid starch; and a spraying unit which is arranged on an upstream side of the bonding unit and sprays moist air on the flute tops of the corrugated medium to which the liquid starch is applied.

Abstract: A double facer that fabricates a corrugated fiberboard and that includes heat plate units having thin walls aims at improving the heat conductive efficiency to fiberboard sheets in order to enhance responsibility to the setting temperature and concurrently avoiding thermal deformation of the heat plates due to a difference in temperature between the top surface and the bottom surface.

Abstract: In a roll for a paper-making machine, a torque which is needed for rotating the roll is reduced and the drive power and a running cost are reduced. A hollow perforated roll in the paper-making machine is rotatably mounted on a bearing housing via a bearing. A cylindrical stationary center shaft extends in an axial direction through a center of the roll and has a perforated circumferential surface. At least two fins extending in an axial direction are mounted on an outer circumferential surface of the center shaft within the hollow interior of the roll, their outer edges being spaced from the inner circumferential surface of the perforated roll. Radially extending disc-like fins are also mounted on the outer circumferential surface of the center shaft perpendicular to an axis of the center shaft with their outer circumferential edges being spaced with a slight gap from the inner circumferential surface of the perforated roll.