| 摘要 |
A generally O-shaped track extends through the central axial opening of a cylindrical object along the ends of a cylindrical object and along its outer cylindrical surface. A trolley moves along the track and carries a roll of strip wrapping material. As the trolley travels along the track and the strip material is paid off the roll, it is wrapped around the interior surface of the central opening, the ends of the cylindrical object, and its outer cylindrical surface as the cylindrical object itself is rotated about its axis. This produces successive, overlapping laps of strip material such that the entire cylindrical object is covered. Means are provided for maintaining the tension of strip material substantially constant as the trolley travels around the track.
|
