SE8801979L - PROCEDURE AND DEVICE IN THE CYLINDER DRYER OF A PAPER MACHINE, IF ANY DOUBLE WOVEN WRAP IS USED - Google Patents
PROCEDURE AND DEVICE IN THE CYLINDER DRYER OF A PAPER MACHINE, IF ANY DOUBLE WOVEN WRAP IS USEDInfo
- Publication number
- SE8801979L SE8801979L SE8801979A SE8801979A SE8801979L SE 8801979 L SE8801979 L SE 8801979L SE 8801979 A SE8801979 A SE 8801979A SE 8801979 A SE8801979 A SE 8801979A SE 8801979 L SE8801979 L SE 8801979L
- Authority
- SE
- Sweden
- Prior art keywords
- web
- negative pressure
- air
- drying cylinder
- region
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
- D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
PURPOSE: To increase the level of a negative pressure and improve the tension of a web at a region where the web is released from a drying cylinder, by disposing an air-jetting means having a special structure in the paper web- releasing region. CONSTITUTION: An air-jetting device 10 is disposed in a region where a made web (wet paper) WP is released together with a metal net 40 from a drying cylinder 41, in order to press the web WP to the drying cylinder 41 by the use of the wire cloth 40 and then transfer the web WP to another drying cylinder 32. A negative pressure is thus formed in the releasing region to improve the release of the web. The air-jetting device 10 is formed in such a structure that negative pressure regions A-, N- are flat L in the jetting direction, that a passage R formed between the outer surface of the wire cloth 40 disposed on the cylinder 41 and the wall surface 14 of the air-jetting device 10 is enough long, and that the flow of a boundary layer following the metal net is returned in the direction opposite to the travel direction of the wire cloth 40 to originally form a proper level of negative pressure in a space formed on the rear side of the passage R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI872691A FI80103C (en) | 1987-06-17 | 1987-06-17 | Method and apparatus in the cylinder dryer of a paper machine, in which a double-weave pull is used |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8801979D0 SE8801979D0 (en) | 1988-05-27 |
SE8801979L true SE8801979L (en) | 1988-12-18 |
SE467626B SE467626B (en) | 1992-08-17 |
Family
ID=8524682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8801979A SE467626B (en) | 1987-06-17 | 1988-05-27 | PROCEDURE AND DEVICE IN THE CYLINDER DRYER OF A PAPER MACHINE, IF ANY DOUBLE WOVEN WRAP IS USED |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2631226B2 (en) |
CA (1) | CA1336535C (en) |
DE (1) | DE3818600A1 (en) |
FI (1) | FI80103C (en) |
SE (1) | SE467626B (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI82095C (en) * | 1987-09-29 | 1991-01-10 | Valmet Paper Machinery Inc | FOERFARANDE OCH ANORDNING I CYLINDERTORKEN AV EN PAPPERSMASKIN. |
US4891891A (en) * | 1988-10-11 | 1990-01-09 | Beloit Corporation | Dryer section apparatus and method |
DE3914761A1 (en) * | 1989-03-08 | 1990-11-15 | Voith Gmbh J M | GUIDE ROLLER FOR A POROUS BAND, FOR EXAMPLE FOR A DRY SCREEN OF A PAPER MACHINE |
FI92420C (en) * | 1992-04-10 | 1994-11-10 | Valmet Paper Machinery Inc | Stabilizer for a paper web in a cylinder group contained in the drying portion of a paper machine |
JPH06185142A (en) * | 1992-12-16 | 1994-07-05 | Sekisui Chem Co Ltd | Wall panel connecting structure |
DE4404726C2 (en) * | 1993-03-11 | 1996-04-25 | Voith Gmbh J M | Pocket ventilation in a two-wire cylinder dryer |
SE9400728L (en) * | 1993-03-11 | 1994-09-12 | Voith Gmbh J M | Cylinder dryer with two wires |
FI96332C (en) * | 1993-04-05 | 1996-06-10 | Valmet Paper Machinery Inc | A method for ventilating the pocket spaces of a paper machine multi-cylinder dryer and a device for ventilating the pocket spaces of a paper machine multi-cylinder dryer |
FI93875C (en) * | 1994-02-17 | 1995-06-12 | Valmet Paper Machinery Inc | Procedure for drying a paper web and drying part in a paper machine |
US5661911A (en) * | 1994-02-17 | 1997-09-02 | Valmet Corporation | Dryer section of a paper machine |
FI98387C (en) | 1995-02-01 | 1997-06-10 | Valmet Corp | Method for the production of surface-treated paper, in particular fine paper, and the dry end of a paper machine |
US5840101A (en) * | 1995-05-27 | 1998-11-24 | Wet Tex Maschinenbau Gmbh | Method and apparatus for treatment of an endless web of material with vacuum |
US6076280A (en) * | 1995-07-26 | 2000-06-20 | Voith Sulzer Papiermaschinen Gmbh | Method and device for drying a fiber web |
DE19527289C2 (en) * | 1995-07-26 | 2000-09-14 | Voith Sulzer Papiertech Patent | Pocket ventilation method and an air guide box for performing the method in a two-wire dryer section of a papermaking machine |
CA2190563C (en) * | 1996-11-18 | 1999-10-26 | Ralph Mancini | Device and method to stabilize sheet between press section and dryer section of a paper-making machine |
US6260287B1 (en) | 1997-08-08 | 2001-07-17 | Peter Walker | Wet web stability method and apparatus |
FI20022231A0 (en) | 2002-12-19 | 2002-12-19 | Metso Paper Inc | Arrangement for tissue stabilization of the web |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3753298A (en) * | 1971-12-17 | 1973-08-21 | Beloit Corp | Web dryer |
DE3236576C2 (en) * | 1982-10-02 | 1988-03-24 | J.M. Voith Gmbh, 7920 Heidenheim | Air guide box for the dryer section of a paper machine |
FI73259C (en) * | 1985-09-13 | 1987-09-10 | Valmet Oy | Method and apparatus in the cylinder dryer of a paper machine |
-
1987
- 1987-06-17 FI FI872691A patent/FI80103C/en not_active IP Right Cessation
-
1988
- 1988-05-27 SE SE8801979A patent/SE467626B/en not_active IP Right Cessation
- 1988-06-01 DE DE19883818600 patent/DE3818600A1/en active Granted
- 1988-06-16 JP JP63147071A patent/JP2631226B2/en not_active Expired - Lifetime
- 1988-06-16 CA CA 569636 patent/CA1336535C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA1336535C (en) | 1995-08-08 |
SE8801979D0 (en) | 1988-05-27 |
JP2631226B2 (en) | 1997-07-16 |
DE3818600A1 (en) | 1988-12-29 |
JPS6414392A (en) | 1989-01-18 |
FI80103C (en) | 1990-04-10 |
FI872691A (en) | 1988-12-18 |
FI872691A0 (en) | 1987-06-17 |
FI80103B (en) | 1989-12-29 |
DE3818600C2 (en) | 1991-09-19 |
SE467626B (en) | 1992-08-17 |
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