| 摘要 |
Apparatus for wrapping articles having a central axial opening includes a guide arm and article turning gear. The guide arm supports a ring member in the form of a split frame having an inside and outside diameter. A drive wheel is mounted on the guide arm, is rotatable about a vertical axis and is in frictional engagement with the outside diameter of the ring member. A plurality of guide rollers, mounted upon the guide arm and which support the ring member, are angularly spaced apart about a ring axis and rotatable about vertical axes, and are disposed adjacent to both the inside and outside diameters of the frame of the ring member. Film material carriage spools are adjustably mounted on the ring member and carried by the ring member through the central axial opening and around the external surfaces of the coil. The ring member is rotatable about the ring axis and causes the film carriage spools to follow an orbital path. In a first embodiment of the invention, the film carriage spools follow an orbital path by the use of a cam device. In a second embodiment of the invention, the film carriage spools follow an orbital path by the use of a film holding arm. The article turning gear positions and supports the article, and then rotates the article during the wrapping process.
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