Perforating unit for producing ventilated cigarettes
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United States of America Patent
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-
May 5, 1998
Grant Date -
N/A
app pub date -
Aug 14, 1996
filing date -
Aug 24, 1995
priority date (Note) -
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status (Latency Note)
Importance
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.
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