Device in the drying section of a paper machine
US4441263A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1981 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Jul 20, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/042
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A means in the drying section of a paper machine. The drying section comprises two rows of drying cylinders or rolls, one above the other. The web travels between these cylinders and rolls, meandering from one row to the other, all the time supported by a drying fabric. Herein, the web lies directly against the cylinder or roll surface in one row of cylinders or rolls and similarly the drying fabric is adjacent to the roll surface, while the web is on the outside, in the other row of cylinders or rolls. The means comprises a suction box (13) or a plurality of suction boxes, disposed to operate against the drying fabric (12). Said suction box (13) or suction boxes (13',13") extend substantially over the entire length of the joint run of the web (W) and the drying fabric from one cylinder or roll to the other. In addition, the suction of said suction box (13;13';13") also extends into the wedge space between the drying fabric (12) and the drying cylinder (11) or equivalent roll shell and in at least the suction box (13) on the entry side (17) of the drying fabric (12) and web (W) or the respective suction boxes, there are suction apertures through which the subatmospheric pressure pr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.