| 摘要 |
PURPOSE:To display various kinds of continuous patterns on the circumference of a cylindrical film, by a method wherein the cylindrical film is extruded, onto an inner and outer surfaces of which tapelike films are extruded while they are being turned and they are made to join to the cylindrical film. CONSTITUTION:Resin A supplied from a first resin supply port 3 is discharged from an annular nozzle 2 through a passage 4 by turning the resin A into a cylindrical film. Resin B supplied from a second resin supply port 16 is ramified into a first passage 18 and second passage 19 by a ramifying passage 17, entered into a resin accumulating chamber 27 of an annular valve 22 of an inner ring 7 and outer ring 8 by passing through a passage hole 25 of an annular packing 24 and discharged fruther through a nozzle 12 of the inner ring 7 and a nozzle 13 of the outer ring 8 from a slit 23 by turning the resin B into a tapelike film. The tapelike film to be discharged through the nozzle 12 of the inner ring 7 is joined to the inside of the cylindrical film to be discharged through the cylindrical nozzle 2 and the tapelike film to be discharged through the nozzle 13 of the outer ring 8 is joined to the outside of the cylindrical film. Various kinds of patterns are displayed by making the inner ring 7 and outer ring 8 turn. |
