Twin fabric forming section with multiple drainage shoes
US8529733B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2009 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Oct 21, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/483
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A forming section for a twin fabric papermaking machine, wherein after stock impingement, the two fabrics carry and sandwich the stock. A plurality of spaced apart drainage shoes, selectively provided to either or both of the fabrics, provides continuous support in the machine direction for the respective fabric in sliding contact, and each drainage shoe deflects the fabrics by a selected angle of wrap comprising an angular displacement between the leading edge and the trailing edge of the drainage shoe. At least one of the drainage shoes is secured to a drainage box and is provided with a plurality of drainage openings extending from the fabric contacting surface through to the machine side surface of the shoe. The arrangements of the invention provide improved drainage and formation of the paper web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.