Transport device for removing interlocked preforms

A conveyor device for transporting preforms (1) intended for the manufacture of hollow bodies made of synthetic material, such as bottles, including a conveyor track (10) incorporating two, substantially parallel slide-rails (11) arranged such that a perpendicular (P) common to both slide-rails is substantially horizontal, said preforms each having a head (2) larger than at least one portion of a body (5) thereof and being engaged vertically between the slide-rails during transport while being supported by their heads, said device comprising:

• means (13) for removing undesirably interlocked preforms (6.sub.1, 6.sub.2), said removal means comprising unbalancing means (14) for shifting a center of gravity (G) of the interlocked preforms such that a vertical line passing through the center of gravity of a group (6.sub.1, 6.sub.2) of interlocked preforms lies outside of one of the slide-rails, such that said group of interlocked preforms becomes unbalanced and falls off the slide rails.