| 摘要 |
<p>An accumulation conveyor (25) includes a plurality of product conveying zones (A, B .... N) arranged in tandem, each zone including a series of conveying rollers (40). Each zone includes an actuator (38) for moving a drive belt (114) against the rollers to drive them. Each zone includes a product sensor comprising a mechanical sensor (46) and a valve (62). The valve is pneumatically coupled to the actuator of an upstream zone for causing operation thereof. When a particular one of the actuators is operated, the mechanical sensor positioned in its zone is retracted below the conveying rollers. <IMAGE></p> |
