Preform-Supply Device Comprising a Device for the Selective Removal of Incorrectly-Positioned Longitudinal Preforms

The invention proposes a system ( 20 ) of feeding preforms, particularly designed to feed a machine for blow moulding receptacles such as bottles, of the type comprising, from upstream to downstream in the longitudinal direction of travel of the preforms ( 10 ), at least one sorting and alignment device ( 28 ) whose top end is fed with jumbled preforms ( 10 ) and whose bottom end comprises at least two alignment rollers ( 38 ), substantially parallel and rotated about their respective axis (A 1 , A 2 ), that are designed to position the preforms ( 10 ) in conveyor rails ( 30 ), inclined relative to the horizontal, to convey them to the machine ( 22 ), and of the type comprising, upstream of the machine ( 22 ), filtering means ( 48 ) to discard the incorrectly positioned preforms, characterized in that the filtering means ( 48 ) comprise, downstream of the alignment rollers ( 38 ), at least one selective discarding device ( 50 ) of the preforms ( 10 ) called lying preforms, that is to say those that arrive from the rollers on the rails lying down and oriented longitudinally and that extend generally longitudinally on the conveyor rails.