Method of and apparatus for making perforations in the wrappers of rod-shaped products
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United States of America Patent
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Apr 19, 2005
Issued Date -
N/A
app pub date -
Nov 12, 2002
filing date -
Jul 2, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An method for increasing the permeability of tubular wrappers of a succession of cigarettes by at least one pulsed beam of coherent radiation issuing from a laser has a hollow drum-shaped conveyor cooperating with a rolling member to define an arcuate channel wherein successive cigarettes roll while advancing sideways past a perforating station. Each beam of coherent radiation is generated in or is caused to enter the interior of the conveyor prior to being influenced by one or more deflecting and/or focussing elements to be propagated substantially radially and through an opening of the hollow conveyor and to impinge upon the wrapper of a cigarette rolling at the perforating station.
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