Method of and apparatus for making perforations in the wrappers of rod-shaped products
US6880559B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Jul 15, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/606
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.