| 摘要 |
<p>This invention relates to a loading mechanism, including a first roller assembly and second roller assembly, at least one mounting for the first and second roller assemblies, wherein the first roller assembly and second roller assembly each have a longitudinal axis, a drive mechanism configured to rotate the first roller assembly and second roller assembly, so as to move an object, wherein as the weight of the object applies pressure to at least one of the first and second roller assemblies the mounting allows the roller assemblies to move so as to change the angle between the longitudinal axis of the first and second roller assemblies.</p> |
