(57) Cigarettes are manufactured on a machine that includes a filter tip attachment comprising
a train of rollers (R) with peripheral suction grooves (8), each proportioned to hold
a single cigarette (26). The grooves (8) are set parallel to the axis of rotation
of the relative rollers (R) and combine to establish a feed path along which the cigarettes
are attracted and released, passing from one roller to the next and advancing through
a succession of processing stations. To optimize the attraction and release steps,
the cigarettes (26) themselves are exploited in such a way as to create a chamber
(35, 35a, 47) in each groove, compassed between the cylindrical surface of the cigarette
and the bottom surface (31, 36, 39) of the groove (8) it occupies, and connected to
the pneumatic circuits generating the suction.
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