| 摘要 |
Packets of cigarettes with a predominating longitudinal axis, presenting two larger side faces, two smaller flank faces and two end faces, are overwrapped by a unit incorporating a first conveyor rotatable about a relative axis, on which a sheet of transparent film is folded initially around the side and flank faces of each packet by one of a set of peripheral holder mechanisms pivotable about respective axes parallel to the axis of the conveyor. Each holder mechanism supports a relative packet, gripped between a pair of jaws and disposed with the longitudinal axis parallel to the axis of the conveyor, and comprises a clip serving to grip and retain one end of the sheet, operating in conjunction with suction holes by which the remaining free end of the sheet is attracted and restrained and thus kept perfectly under control during the transfer of the packet to a second conveyor that will complete the initial overwrapping step.
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