Device for continuous thermal treatment of multidimensional sheet structures consisting of fibers made of polyacrylonitrile
US5967770A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jul 11, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/225
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A device for continuous thermal treatment of multidimensional sheet structures consisting of fibers (18) made of polyacrylonitrile or substantially polyacrylonitrile comprises a furnace (23) with chamber-like sections, through which sections the sheet structure is continuously moved on a gas permeable transport track (21). In each of the chamber-like sections there is a gas stream flowing through the sheet structure perpendicular to the sheet structure. In every section, devices measure the parameters of the gas stream temperature, pressure and gas flow above and below the sheet structure to control the operation of heating elements (26), fans (27) in the approach flow region, and fans (28) in the outflow regions of every section. These parameters are adjusted to predetermined values necessary for an effective and precise thermal treatment of the sheet structures (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.