Papermaking machine for forming tissue employing an air press
US6613194B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F11/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.