Perforating unit for producing ventilated cigarettes

Details Perforating unit for producing ventilated cigarettes Perforating unit for producing ventilated cigarettes

1996-08-14

1998-05-05

Millin, Vincent

Tobacco

Cigar or cigarette making

Including perforating

2191216, 359558, A24C 138

Patent

active

057462291

ABSTRACT:
A perforating unit for producing ventilated cigarettes, wherein a laser beam, emitted by a laser source along an axis, is reflected and focused by a movable reflecting and focusing assembly and a reflecting element, both rotating about the axis, to produce a focused beam directed on to given points of a succession of cigarettes traveling about both the axis of the beam and about their own axis; the movable assembly presenting at least one diffracting optical element for dividing the focused beam into a given number of identical further beams to form, on each cigarette, a number of rings of ventilation holes equal to the aforementioned given number.

REFERENCES:
patent: 4647752 (1987-03-01), Mattei et al.
patent: 5060668 (1991-10-01), Weinhold
patent: 5103841 (1992-04-01), Okumoto et al.
patent: 5105833 (1992-04-01), Mattei
patent: 5498851 (1996-03-01), Hayashi et al.

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