Continuous controlled drainage
US5089090A · kind A · utility
20Cited by
15References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1991 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Feb 26, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F9/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process and apparatus for improving stock formation on an open surface paper making machine is described. By the use of both a path for the forming fabric which introduces a controlled level of agitation into the stock, and a low level of vacuum in a suction box extending continuously for at least the major proportion of the forming section, improvements both in paper quality, such as improved wire mark, and in machine operation, such as an improved first pass retention, are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.