METHOD OF MANUFACTURING INTERIOR BAG AND JIG USED FOR THE SAME

PROBLEM TO BE SOLVED: To provide a manufacturing method, which can obtain a synthetic resin interior bag in which an upper and lower ends of a cylindrical body are closed by a top plate and a bottom plate at low costs and certainly.SOLUTION: A jig 1 which becomes convertible in a bow shape or in a r...

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1. Verfasser: KAWADA TETSUYA
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a manufacturing method, which can obtain a synthetic resin interior bag in which an upper and lower ends of a cylindrical body are closed by a top plate and a bottom plate at low costs and certainly.SOLUTION: A jig 1 which becomes convertible in a bow shape or in a ring shape having a slightly larger diameter than a diameter of the cylindrical body 8 is fitted in a ring shape from the inside of a bag body 10 and fixed, and the bag body 10 is leaded on a frame 12 capable of holding the jig 1 from beneath. In a state that an upper opening 11 is kept in a circle an upper side part from the jig 1 is constricted on the inner side of the opening 11 by heating to make a welding piece 13, on top of this the other end material is overlapped to weld, and thereafter, the jig 1 converted from the ring shape to the bow shape is taken out from a nozzle 15 of the top plate.