Method for making soft tissue
US5743999A · kind A · utility
78Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1994 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Jun 15, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31F2201/0758
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper sheets, such as creped tissue sheets used for converting into tissue products such as facial tissue and bath tissue, can be softened with by passing the sheets through one or more fixed-gap noncompactive straining nips formed between two engraved rolls having partially-engaged small straining elements of a shape which strains the sheet in all directions. The straining treatment substantially reduces the rigidity of the tissue sheet by increasing the internal bulk without substantially reducing the tensile strength. The method provides a means for making a throughdried-like tissue sheet from a wet-pressed tissue sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.