Abstract: The present invention relates to an installation for processing receptacles comprising at least one processing zone receiving a filling device beneath which extends a portion of a receptacles conveyor device comprising: a first belt going round a first drive pulley and a first driven pulley, both being rotatively mounted about vertical axes, the belt being provided with at least one horizontally-extending receptacle-drive member projecting therefrom, a second belt going round a second drive pulley and a second driven pulley, both being rotatively mounted about the axes of the pulleys of the first belt so that the belts are superposed, and the second belt being provided with at least one horizontally-extending receptacle-drive member projecting therefrom, and actuator means for independently actuating the drive pulleys, a loading zone and an unloading zone being arranged in the vicinity of the pulleys on both sides of the processing zone. The invention also provides a corresponding conveying method.