| 摘要 |
A live roller conveyor comprising a plurality of rollers which provide a conveying surface for a plurality of articles supported on said surface, a first friction drive means operable to apply to at least some of the rollers a first torque, a second friction drive means operable to apply to at least some of the rollers a second torque of the opposite rotational sense to that of the first torque and a control means to control the drive means so that a variable driving force may be applied to the articles by the rollers to advance the articles along the conveyor in a first state of operation of the conveyor and to apply a reduced driving force to the articles in a second state of operation of the conveyor. |
