|
| US4207458 | 18 Oct 1978 | 10 Jun 1980 | Philip Morris Incorporated | Method of electrically perforating a planar web |
| US4236062 | 30 Jun 1978 | 25 Nov 1980 | Philip Morris Incorporated | Apparatus for electrical perforation of webs |
| US4247754 | 15 Ene 1979 | 27 Ene 1981 | Hauni-Werke Korber & Co. KG. | Apparatus for perforating webs of wrapping material for rod-shaped smokers products |
| US4253010 | 23 Abr 1979 | 24 Feb 1981 | Olin Corporation | Spatially distributed electrostatic perforation of moving webs |
| US4295478 | 11 Abr 1979 | 20 Oct 1981 | RJR Archer, Inc. | Composite tipping structure for use on an air-ventilated cigarette and method of manufacturing same |
| US4314142 | 22 Jul 1980 | 2 Feb 1982 | Olin Corporation | Spatially distributed electrostatic perforation of moving webs |
| US4447709 | 21 Dic 1979 | 8 May 1984 | Olin Corporation | Method for electrically perforating dielectric webs |
