Abstract: Disclosed is a method for unblocking the movement of hollow bodies travelling in a line in a conveyor, including: a guiding chute in which each hollow body is intended to take up a freely suspended position; a component for continuously driving hollow bodies into the chute in a direction of movement; a hollow body being likely to take up a position in which it is stuck against a stationary surface of a member that complements the chute and thus to block the movement of the hollow bodies that build up behind same. The method includes an unblocking step which consists of applying an unblocking pulse to the hollow bodies of the blocked line against the direction of movement in order to move the blocking hollow body away from the stationary surface and to allow the blocking hollow body to swivel into the freely suspended position thereof in the chute.

Abstract: Disclosed is a method for unblocking the movement of hollow bodies travelling in a line in a conveyor, including: a guiding chute in which each hollow body is intended to take up a freely suspended position; a component for continuously driving hollow bodies into the chute in a direction of movement; a hollow body being likely to take up a position in which it is stuck against a stationary surface of a member that complements the chute and thus to block the movement of the hollow bodies that build up behind same. The method includes an unblocking step which consists of applying an unblocking pulse to the hollow bodies of the blocked line against the direction of movement in order to move the blocking hollow body away from the stationary surface and to allow the blocking hollow body to swivel into the freely suspended position thereof in the chute.

Abstract: A device and method for aligning preforms in a row and righting same, the method being intended for use with axisymmetric preforms having an annular supporting face. The method includes a first step of discharging the preforms in bulk onto a rotating horizontal platen; a second step of aligning the preforms against a fixed peripheral rail by way of the centrifugal force produced by the rotation of the rotating platen; a third step of successively righting the aligned preforms by tilting the preform bodies, performed under the annular supporting face. During the second alignment step, the main axis of the preforms is oriented essentially tangentially to the direction of movement.

Abstract: Disclosed is a device for aligning preforms in a row and righting same, the device including a bowl centrifuge formed by: a horizontal circular platen rotating about a vertical axis; a fixed peripheral rail; at least a first angular sector for aligning the preforms against the rail; and at least a second angular sector for righting the preforms. The device includes a unit for actively ejecting incorrectly aligned preforms from the row of correctly aligned and righted preforms.

Abstract: Disclosed is a method for aligning preforms in a row and righting same, the method being intended for use with axisymmetric preforms having an annular supporting face. The method includes: a first step of discharging preforms in bulk onto a rotating horizontal platen; a second step of aligning the preforms against a fixed peripheral rail by way of the centrifugal force produced by the rotation of the rotating platen; a third step of successively righting the aligned preforms by tilting the preform bodies, performed under the annular supporting face. During the second alignment step, the main axis of the preforms is oriented essentially tangentially to the direction of movement. Also disclosed is a device for carrying out the method.

Abstract: Disclosed is a device for aligning preforms in a row and righting same, the device including a bowl centrifuge formed by: a horizontal circular platen rotating about a vertical axis; a fixed peripheral rail; at least a first angular sector for aligning the preforms against the rail; and at least a second angular sector for righting the preforms. The device includes a unit for actively ejecting incorrectly aligned preforms from the row of correctly aligned and righted preforms.