A conveyor configured to transport bottles or containers having varying diameters in lines to a bottle or container handling machine comprising one of a bottle or container cleaning machine and a bottle or container packaging machine, said conveyor comprising:
- at least one conveyor surface being configured and disposed to contact and move bottles or containers thereon in a direction of transport;
- three elongated guide walls being disposed substantially parallel to one another and spaced apart from one another to define two guide lanes there between in which bottles or containers being moved by said at least one conveyor surface are to be guided;
- said three elongated guide walls being disposed above and to extend along at least a portion of said at least one conveyor surface in the direction of transport;
- said three elongated guide walls comprising a first elongated guide wall, a second elongated guide wall, and a third elongated guide wall, said second elongated guide wall being disposed between said first elongated guide wall and said third elongated guide wall;
- a first movable guide wall being disposed on a first side of said second elongated guide wall between said second elongated guide wall and said first elongated guide wall;
- a second movable guide wall being disposed on a second side of said second elongated guide wall between said second elongated guide wall and said third elongated guide wall;
- and
- each of said movable guide walls being configured to be moved back and forth to varying positions between a first position immediately adjacent said second elongated guide wall and a second position a distance away from said second elongated guide wall projecting into said guide lanes to thereby adjust the width of said guide lanes to substantially match the width of bottles or containers having varying diameters to be transported.