APPARATUS FOR PERFORATING WEBS OF WRAPPING MATERIAL FOR TOACCO OR THE LIKE

摘要

Apparatus for making holes in a running web of tipping paper for filter cigarettes has a carrier for a battery of suitably distributed perforating units 37 each of which has an optical system for focusing upon the running web 13 a discrete beam of coherent radiation which is furnished by a laser. The making of holes entails the development of contaminants, and such contaminants are removed by air streams which are circulated through the perforating units not only to remove the contaminants but also to cool the optical systems of the respective perforating units.