Method for perforating tissue sheets
US9409372B2 · kind B2 · utility
30Cited by
30References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2008 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Aug 7, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31F2201/0797
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Curvilinear or other complex perforation patterns for paper products, such as paper towels and bath tissue, can be produced using a differential speed perforation nip formed between a rotating pattern roll and a moving anvil surface. The relative speed between the perforation elements on the surface of the pattern roll and the anvil surface shears the web at the perforation points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.