Extended nip roll, an extended nip press making use of the extended nip roll, a papermaking machine and a method of operating an extended nip press
US9181655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F11/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an extended nip roll (5) capable of forming a press nip (N) with a counter roll (7) which press nip (N) has an extension in a machine direction when the extended nip roll (5) cooperates with the counter roll (7). The extended nip roll (5) comprises a flexible jacket; an elastic press body (13) arranged inside the flexible jacket. The top side (14) of the press body (13) is beveled in such a way that, in the machine direction, a working surface (15) of the top side has a downstream end (16) which, in the machine direction, is followed by an exit side surface (17) that diverges from the interior surface (11) of the flexible jacket (10). The press body (13) further has at least a first and a second internal pressure chamber (18, 19). The pressure chambers (18, 19) can be pressurized such that the press body (13) expands. The first internal pressure (18) chamber has an extension in the machine direction that does not extend beyond the working surface (15) and the second internal pressure chamber (19) is located downstream of the first internal pressure chamber (18) and has an extension in the machine direction beyond the downstream end (16) of the working surfa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.