System for arranging objects at a multi-entrance work group, comprising: - a conveyor adapted to convey the oriented objects in a single row along a conveying path up to a pickup section of the conveying path, - a screw distributor arranged at the pickup section and extending along a predetermined number of entrance points of the multi-entrance work group, said screw distributor comprising a helical wall shaped and operable in rotation so as to engage a number of said objects corresponding to the predetermined number of entrance points and position each of the engaged objects in one of said entrance points, respectively, characterized in that the system is comprising: - an orientation device for orienting the objects with a desired orientation, and in that - the conveyor is connected to the orientation device, and in that the conveyor comprises: - a support structure forming a channel extended along the conveyor path and adapted to receive a single row of objects, and - one or more support and sliding surfaces extended along the conveyor path and adapted to support the objects in the channel, wherein the single objects are supported in the channel with an open end facing upwards and with a closed end facing downwards, - a blowing system which directs one or more air flows into the channel in such a way as to move the objects along the conveyor path and to exercise on them, in the pickup section, an accumulation thrust in pressing contact against each other in an output direction towards the screw conveyor. - a conveyor adapted to convey the oriented objects in a single row along a conveying path up to a pickup section of the conveying path, - a screw distributor arranged at the pickup section and extending along a predetermined number of entrance points of the multi-entrance work group, said screw distributor comprising a helical wall shaped and operable in rotation so as to engage a number of said objects corresponding to the predetermined number of entrance points and position each of the engaged objects in one of said entrance points, respectively, - an orientation device for orienting the objects with a desired orientation, and in that - the conveyor is connected to the orientation device, and in that the conveyor comprises: - a support structure forming a channel extended along the conveyor path and adapted to receive a single row of objects, and - one or more support and sliding surfaces extended along the conveyor path and adapted to support the objects in the channel, wherein the single objects are supported in the channel with an open end facing upwards and with a closed end facing downwards, - a blowing system which directs one or more air flows into the channel in such a way as to move the objects along the conveyor path and to exercise on them, in the pickup section, an accumulation thrust in pressing contact against each other in an output direction towards the screw conveyor. - a support structure forming a channel extended along the conveyor path and adapted to receive a single row of objects, and - one or more support and sliding surfaces extended along the conveyor path and adapted to support the objects in the channel, wherein the single objects are supported in the channel with an open end facing upwards and with a closed end facing downwards, - a blowing system which directs one or more air flows into the channel in such a way as to move the objects along the conveyor path and to exercise on them, in the pickup section, an accumulation thrust in pressing contact against each other in an output direction towards the screw conveyor.