Patent ID: 6675811
Filing Date: 2004-01-13
Classification: A24C,B23K

Abstract:
A method of changing permeabilities of tubular wrappers of rod-shaped products of a tobacco processing industry, the method comprising:simultaneously changing the permeabilities of wrappers of a plurality of the rod-shaped products of the tobacco processing industry consecutively conveyed in a conveying direction, said changing step including rolling the plurality of products, establishing at least two substantially parallel laser beams, directing the at least two laser beams upon a common beam reflecting mirror, oscillating the mirror and reflecting the at least two laser beams upon a first set of at least two consecutive rolling products, the oscillating step composing swiveling the mirror from a first position to a second position to move the at least two laser beams synchronously in the conveying direction of the first set of at least two rolling products, and swiveling the mirror opposite to the conveying direction back to the first position to reflect the at least two laser beams upon another set of at least two consecutive rolling products following the first set of at least two consecutive rolling products.