Abstract: The present invention has an object to provide a rotating polishing tool with high durability that can finish a polished surface with desired surface roughness. As means thereof, a substantially cylindrical polishing member 3 is constituted by a pair of polishing units 9 at opposite ends, and an intermediate portion 10 provided between the pair of polishing units 9. The polishing member 3 is rotatably supported around the central axis thereof, and polishes a polished surface with a peripheral surface thereof. The polishing unit 9 includes a plurality of abrasive cloth/paper sheets 7 pressingly held by an inner metal fitting 8, and forms peripheral edges of the abrasive cloth/paper sheets 7 into a serpentine shape. The intermediate portion 10 includes a plurality of laminated abrasive cloth/paper sheets 7 axially pressingly held by the polishing units 9.

Abstract: A method of sealing the nose a packaging flat tube band after opening thereof. The method comprises separately adsorbing the upper and lower films and separating these films away from each other thereby to open the nose, charging a matter to be packaged through the opened nose in the horizontal direction, welding the tube band at both sides of the packaged matter transversely, and cutting the portion of the flat the tube band adjacent to the feed side. These steps are repeatedly to sucessively seal the nose of the packaging flat tube band. Disclosed also is an apparatus suitable for carrying out this nose sealing method.

Abstract: An improved method for the automatic packing of articles in which bag sections are successively made of tubular plastics bag material which is intermittently conveyed. Goods are charged into a bag section formed at the leading end of the bag material. Thereafter the goods-charged bag section is heat-sealed at an opening portion thereof and separated from a subsequent bag section of the bag material. In accordance with the invention, before charging the bag section with goods, a piece of reinforcing sheet is inserted in and secured to the foremost bag section to form a reinforced handle portion having an opening for suspension of the finished bag.

Abstract: This invention provides an improved method and apparatus for automatically controlling travel of two transversely spaced parallel plastics film strips in a bag-making machine or the like that can correct rapidly the relative positional gaps produced between the register marks on the strips by means of a new retarding device for the strips as incorporated in the apparatus.

Abstract: This invention provides a packing machine with a supporting device for supporting a foremost single bag section of a strip-like plastics bag material. The machine comprises a pair of intermittently operated pinching rollers for intermittently transferring the bag material and a pair of heat-sealers provided thereunder for heat-sealing the foremost single bag section after goods have been packed therein. The bag-supporting device is provided under one of the heat-sealers and comprises a supporting member for supporting the bottom of the bag section when goods are packed therein, the supporting member being arranged to be swung about a horizontal axis and operatively connected with a reciprocating crank mechanism.

Abstract: A packing machine is disclosed in which an apparatus for automatically stopping a pair of intermittently operated pinching rollers for transferring a strip-like plastics bag material is provided. The apparatus is a kind of emergency stop and is arranged to be automatically operated in case the bag material loaded in the machine has been broken.

Abstract: This invention provides a method of transferring a strip-like plastic bag material in a packing machine. The method comprises the steps of transferring the bag material by a pair of intermittently operated pinching rollers. The bag material comprises a series of interconnected bags each having a heat-sealed bottom portion with a flap-like margin. The flap-like margin is raised during transfer of the bag material by guide means. The bottom portion is then detected by means of a microswitch having an elongated contact adapted to be releasably engaged with the flap-like margin as the flap-like margin is raised by the guide means during transfer of said bag material. The bag material is then stopped for a packing operation in response to detection by the microswitch of the bottom portion.

Abstract: This invention provides an apparatus for transferring a strip-like plastic bag material in a packing machine. The apparatus comprises a pair of intermittently operated pinching rollers for intermittently transferring the bag material, said bag material comprising a series of interconnected bags each having a heat-sealed bottom portion with a flap-like margin, a mechanism for raising said flap-like margin during transfer of said bag material, a microswitch for detecting said bottom portion, said microswitch having an elongated contact adapted to be releasably engaged with said flap-like margin as said flap-like margin is raised during transfer of said bag material and means for stopping said bag material in response to detection by said microswitch of said bottom portion.

Abstract: A film strip of a thermoplastic synthetic resin, as a bag or package material, is continuously supplied, from an extruder to a printing machine, bag-making machine, packaging machine or like machine. In the apparatus, the material film strip supplied from the extruder at the initial stage of operation thereof, is first led to and wound by a winder, and then fed to such machine. A switching mechanism is provided for shifting the strip from one travel course to another.