| 摘要 |
STRETCH FILM WRAPPING DEVICE A stretch film wrapping device for rotatably supporting a roll of film and dispensing the film at a selected tension includes a base member, a hub member having a device for mounting a roll of stretchable film, a shaft, a means for joining the shaft to the base and hub members to permit rotation of the hub member with respect to the base member. The means joining the shaft to the base and hub members includes a friction device for resisting rotation of the hub member with respect to the base member. The friction device includes a pair of friction surfaces mounted on the shaft. One of the friction surfaces is non-rotatably mounted to the base member and the other is non-rotatably mounted to the hub member. The friction device retards rotation of the hub member with respect to the base member. Each of the friction surfaces has an annular area extending radially outward from the shaft for frictional contact between the friction surfaces. A compressible device is mounted on the shaft for exerting through the shaft a selected force between the two friction surfaces. In this manner, a selected frictional force is maintained between the frictional surfaces for retarding rotation of the hub member with respect to the base member. |
