Abstract: A head attachment is attached to a welding head of a laser welding machine. The head attachment includes an opening through which a laser beam emitted from the welding head for irradiation to a weld position passes. A gas blow nozzle is attached to the side of the head attachment and blows shielding gas to the weld position. The gas blow nozzle includes a main nozzle that is disposed closer to the head attachment and is supplied with the shielding gas by a first gas pipe, and a sub-nozzle that is disposed so as to be adjacent to the main nozzle and farther away from the head attachment than the main nozzle and is supplied with the shielding gas by a second gas pipe. The sub-nozzle is removable from the main nozzle.

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 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: There is provided a defective product removing device for a box macking machine that removes a sheet material as a defective product from a manufacturing line for manufacturing a box by processing the sheet material, the defective product removing device including: a quality determining device for determining the quality of the sheet material based on a predetermined inspection result with respect to the sheet material conveyed in the manufacturing line; a defective product removing portion for removing the sheet material of which a surface is subjected to creasing processing and slotting and which is not folded yet from the manufacturing line; and a sorting device for operating the defective product removing portion with respect to the sheet material determined as a defective product by the quality determining device.

Abstract: In a double facer in which a one-sided corrugated board and a liner sheet which are web-like and which are superposed with each other are glued to each other while they travels on a heating plate so as to produce a corrugated board, the heating plate has a thin wall thickness so as to enhance the efficiency of heat transfer to a paper sheet which travels on the upper surface of the heating plate, and the heating plate 20 is provided at the lower surface thereof with a heat radiation means (having the configuration that reinforcing ribs 22 are formed at the lower surface of the heating plate in a direction orthogonal to the direction of travel of a paper sheet, having their height which are successively decreased, or several steam through-holes 51 are formed in the heating plate, and are adapted to be fed therein with saturated steam whose pressure or temperature is successively lowered) in order to decrease a temperature difference between the upper surface and the lower surface of the heating plate so as to

Abstract: The present invention relates to integrated circuit (IC) tags. The IC tag (40) placed on sheet products handled in batch units after production, and used to manage the sheet products. The IC tag includes an IC tag main body (41) having an IC chip and a radio antenna embedded therein, and a plate (42) with a flat portion (42a) in which the IC tag main body (41) is installed. The plate (42) has at its one end a protrusion (42b) extending from the flat portion (42a). This makes it possible to attach and detach the IC tag to and from the inner side of the paper tube.

Abstract: An order changing method in a corrugating machine having a slitter scorer devices and a plurality of cut-off devices includes a step of aligning a dividing slit of an old order corrugated fiberboard web, which does not coincide with a centerline of the old order corrugated fiberboard web, with a dividing slit of a new order corrugated fiberboard web, which does not coincide with a centerline of the new order corrugated fiberboard web, wherein the new order corrugated fiberboard web has a width different from a width of the old order corrugated fiberboard web such that the method can decrease the number of defective sheets generated during an order change.

Abstract: Provided is an order changing method in a corrugating machine which can decrease the number of defective sheets generated during an order change and can continuously stack the sheets in a stacking portion of an upper-stage stacker.

Abstract: This invention relates to a rotary cutoff apparatus, which permits easy speed control without needing high-level skill or technique and also allows ready replacement of its anvil member. The apparatus is provided with a knife cylinder, which has a knife arranged on its outer circumferential surface and is rotatably supported, and an anvil member with which a free edge of the knife can be brought into contact upon rotation of the knife cylinder, whereby a travelling band-shaped sheet is nipped between the knife and the anvil member and is hence cut off. The knife is supported on the knife cylinder via a spring having spring force sufficient to bear cutting force required to cut off the band-shaped sheet so that the knife is displaceable in a loaded direction upon cutting off the band-shaped sheet. The rotary cutoff apparatus according to the present invention can be arranged, for example, in a production line for a band-shaped sheet material such as a corrugated fiberboard sheet.

Abstract: This invention relates to a double facer of a corrugating machine which aims to improve a drying state or bonding state between a single-faced corrugated fiberboard sheet and a liner and improve the quality of a corrugated fiberboard sheet. In a double facer for bonding together a single-faced corrugated fiberboard sheet and a liner to form a corrugated fiberboard sheet, provided are a heating member disposed along a conveying direction of the corrugated fiberboard sheet; a pressing unit, disposed so as to oppose the heating member, for pushing the corrugated fiberboard sheet against the heating member; a sheet conveying unit, disposed downstream the heating member, for conveying the corrugated fiberboard sheet; and a sheet feeding unit for feeding the corrugated fiberboard sheet toward the sheet conveying unit; while the pressing unit comprises a plurality of pressing devices disposed in series as being separated from each other along the conveying direction of the corrugated fiberboard sheet.

Abstract: A presser shoe is disposed over the entire width of a single-faced corrugated board opposedly to a glue applicator roll with a traveling path of the single-faced corrugated board therebetween, and a flexible tube is provided which presses the presser shoe toward the single-faced corrugated board by air pressure. The air pressure to be fed to the flexible tube is regulated to a predetermined pressure by an air pressure regulator so as to afford a constant pressing force continually even in the use of single-faced corrugated boards of different flutes.

Abstract: In a stuck sheet material manufacturing system for manufacturing a stuck sheet material, which has a sticking device for sticking together a front sheet member and a rear sheet member, the sticking device includes a heating member for heating a sheet member and a pressure device provided oppositely to the heating member for pressing a stuck sheet material to the heating member, and the pressure device includes a supporting member arranged so as to be extended in a horizontal direction perpendicular to a traveling direction, a plurality of weight blocks suspended from the supporting member via elastic members and arranged side by side and vertical movement driving means for driving the vertical movement of the supporting member.

Abstract: An improved disc-shaped knife rotary cutter which has a reduced size and is not complicated in structure as a whole, and which require a knife only on the upper side of a traveling sheet. The knife can be used over a long period and paper powder produced as a result of cutting of a sheet by the knife can be removed by a suction box extending over a full width of the sheet. The improved rotary cutter performs cutting by moving a knife edge portion of a rotating disc-shaped knife into a surface of a sheet being successively fed. On the underside of the traveling sheet, a brush consisting of rod-shaped brush elements is fixed on a backing table over the entire region in the lateral widthwise direction of the sheet. A knife edge of the knife is disposed close to a front end portion of the backing table and upon transfer of the knife in the lateral widthwise direction of the sheet the knife is raised to be disengaged from the brush and the sheet and then it is transferred and set in position.

Abstract: An apparatus for preventing sheets conveyed successively on a conveyor from being stacked up at the end of the conveyor in a disordered state in alignment is improved so as to assure stable operation without deforming edge portions of the handled sheets. The improvements reside in that the apparatus comprises a pair of guide members disposed on a sheet passageway above an inlet of a sheet stack-up section respectively so as to be swingable in the direction of traveling of the sheets and adjustable in positions in the lateral directions, a drive for independently adjusting the positions of the guide members in the lateral directions, sensors for detecting opposite side edge portions of a sheet moving on a transporting conveyor, and a control responsive to results of detection by the sensors for actuating the drive to adjust the positions of the respective guide members in the lateral directions.