CA2018317A1 - Method and device in the press section of a paper machine for the control of the nip-pressure profile - Google Patents
Method and device in the press section of a paper machine for the control of the nip-pressure profileInfo
- Publication number
- CA2018317A1 CA2018317A1 CA 2018317 CA2018317A CA2018317A1 CA 2018317 A1 CA2018317 A1 CA 2018317A1 CA 2018317 CA2018317 CA 2018317 CA 2018317 A CA2018317 A CA 2018317A CA 2018317 A1 CA2018317 A1 CA 2018317A1
- Authority
- CA
- Canada
- Prior art keywords
- press
- nip
- roll
- distribution
- rolls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A method and apparatus in the press section of a paper machine for regulating the axial linear-load profiles in its nip or nips (N1,N2,N3). The axial temperature profile(s) of the outer mantle(s) of a press roll or rolls (11, 13, 16, 17) is/are regulated. Thereby, the distribution of the diameter of the press roll in the axial direction is controlled on the basis of thermal expansion. Also thereby, the distribution in the transverse direction of the machine of the linear load in the press nip or nips (N1,N2,N3) formed by the press roll or rolls (11, 13, 16, 17) is affected. The temperature profile of the outer mantle(s) (11', 13', 17') of the press roll or rolls (11, 13, 17) is regulated by a press felt or felts (10, 14, 18) running through the press nip or nips (N1, N2, N3) formed by the roll applying a heating/cooling effect whose profile in the axial direction of the roll is regulated, and/or by applying a set of water jets (F) directly onto the outer mantle(s) of the press roll or rolls, the jets' quantity distribution (Fl...FN) and/or temperature distribution (Tl...TN) being regulated so as to obtain the desired distribution of nip-pressure profile.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI892757 | 1989-06-06 | ||
| FI892757A FI82956C (en) | 1989-06-06 | 1989-06-06 | FOERFARANDE OCH ANORDNING FOER KONTROLL AV NYPTRYCKSPROFILEN I PRESSPARTIET AV EN PAPPERSMASKIN. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2018317A1 true CA2018317A1 (en) | 1990-12-06 |
| CA2018317C CA2018317C (en) | 1998-11-17 |
Family
ID=8528578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2018317 Expired - Fee Related CA2018317C (en) | 1989-06-06 | 1990-06-05 | Method and device in the press section of a paper machine for the control of the nip-pressure profile |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2018317C (en) |
| FI (1) | FI82956C (en) |
-
1989
- 1989-06-06 FI FI892757A patent/FI82956C/en not_active IP Right Cessation
-
1990
- 1990-06-05 CA CA 2018317 patent/CA2018317C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI892757A (en) | 1990-12-07 |
| FI892757A0 (en) | 1989-06-06 |
| CA2018317C (en) | 1998-11-17 |
| FI82956C (en) | 1991-05-10 |
| FI82956B (en) | 1991-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |