Method and machine for producing ventilated cigarettes

Details Method and machine for producing ventilated cigarettes Method and machine for producing ventilated cigarettes

1995-03-15

1997-02-04

Bahr, Jennifer

Tobacco

Cigar or cigarette making

Including perforating

21912171, 21912177, A24C 560

Patent

active

055988555

ABSTRACT:
A method and machine for producing ventilated cigarettes comprises forming a succession of double cigarettes, each comprising two cigarette portions and an intermediate double filter joined by an intermediate connecting band. The double cigarettes are translated to respective double cigarette supporting means on a rotary conveyor having an axis. The supporting means includes a rotatable gondola normally facing outward in relation to the conveyor and rotatable about the axis and rest means fixed in relation to the conveyor. Each double cigarette is arranged in engagement with the respective supporting means so that a first end portion of the double cigarette laterally engages the rotatable gondola. A second end portion of the double cigarette laterally engages the rest means. An intermediate portion of the double cigarette including the intermediate double filter is free. The conveyor is advanced to feed the double cigarettes through a perforating station. At the perforating station, each double cigarette is rotated about its axis by rotating the relevant gondola. At least two rings of ventilation holes are formed in the intermediate portion of each double cigarette as the gondola is rotated about its axis. The forming of the rings of ventilation holes comprises directing a pulsed laser beam along the conveyor axis, splitting the beam and directing the resulting beams divergently to concurrently impinge upon and perforate the intermediate portions of widely separated double cigarettes.

REFERENCES:
patent: 5148818 (1992-09-01), Arthur

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