Method of and apparatus for increasing the permeability of wrappers of rod-shaped articles
US6675811B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/50
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for increasing the permeabilities of central portions of tubular wrappers which form part of successive filter cigarettes of double unit length being turned out by a tipping machine. The central portions of the wrappers include adhesive-coated uniting bands which are convoluted around filter mouthpieces in a first portion of a rolling channel for successive filter cigarettes. A perforating unit which employs laser beams is set up to simultaneously perforate the central portions of the wrappers of several successive cigarettes in a second portion which immediately follows or partially overlaps the first portion of the channel. Each wrapper can be provided with two or more annular arrays of perforations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.