US3861996A - Paper web transfer system carrying the web from forming wire to press section - Google Patents
Paper web transfer system carrying the web from forming wire to press section Download PDFInfo
- Publication number
- US3861996A US3861996A US124766A US12476671A US3861996A US 3861996 A US3861996 A US 3861996A US 124766 A US124766 A US 124766A US 12476671 A US12476671 A US 12476671A US 3861996 A US3861996 A US 3861996A
- Authority
- US
- United States
- Prior art keywords
- felt
- roll
- web
- press
- pick
- 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.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/36—Guiding mechanisms
Definitions
- 162/274 162/306 162/358 suction pick-up roll located adjacaent the forward run 162/366 of the forming wire is wrapped in part by a first end- Inti. less pick-Up felt picks the Wb up from the [58] Field of 'i; 16 210 360 forming wire and carries it through the first press nip "fag of the press section. Prior to contacting the paper web the first felt passes through a press nip (for liquid re- [56] References Cited moval) formed between the suction pickup roll and a press roll.
- a press nip for liquid re- [56] References Cited moval
- a second felt i.e., lower support felt
- PATENTS contacts the web carried by the first pick-up felt belii ii a1 162/113 x en the forming wire and press section.
- PATENTEDJANZHQYB 3.86139 SHEETIUF 2 Fig. 3
- the invention relates to the field of pressing a fiber web in a press section.
- the pick-up felt is pressed against the pick-up roll by means of a press roll to eliminate slipping of the felt and stretching of the web.
- the paper produced in accordance with the invention has better elasticity than paper manufactured by prior known methods.
- FIG. 1 illustrates schematically a press section of a paper machine for carrying out the method according to the invention
- FIGS. 2-6 illustrate schematically alternative embodiments of the press section.
- FIG. 1 is the wire of the web-forming part, from where the suction roll 2 working as a pick-up roll moves the paper web 12 with the suction effect of the roll to the endless felt 8.
- the suction roll, together with roll 1, forms a press nip through which the felt 8 runs.
- the felt and the paper web run to roll 3 at a distance from roll 2; roll 3 and roll 4 together form another press nip, where liquid is pressed out of the paper web 12.
- roll 4 together with roll 5.
- a suitable roll combination is a suction roll 3, a stone roll 4, and a grooved roll 5. The direction of the movement of the paper web is illustrated by arrows.
- FIG. 1 also illustrates the drying and cleaning devices of the endless felt 8 and the respective devices 16 of the pressing felt l4.
- FIG. 5 illustrates a corresponding arrangement in a case in which the rolls 6 and 7 of the supporting wire 9 participate in forming the pressing points.
- the felt and the web can be supported in other ways as well.
- a suction box 10 has been fitted above the felt to keep the felt part horizontal.
- a blowing device 11 has been respectively fitted below the felt; this device creates a cushion of air to support the felt part.
- the pair of rolls 1 and 2 forms the so-called washing press of the felt and removes from the felt liquid that has been absorbed by it. Because the paper web is supported between rolls 2 and 3, the felt can be relatively dry there, in which case the proportionate dryness of the paper web, also, will be high after the first pressing point.
- the paper web travels from the upper pick-up felt 8 running around the pick-up roll 2, to the lower support felt 9 at the pressing point formed by pressing roll 6, which is inside the lower felt, together with the pick-up felt.
- the paper track, supported by the lower felt runs to the next pressing point formed by pressing roll 7, which is inside the lower-felt loop, together with pressing roll 3, onto which the paper web moves following the pressing point.
- FIGS. 5 and 6 have in common the passage of the upper pick-up felt alone through a press nip, a second press nip through which the web is passed between two felts, and a third nip through which the paper web passes along with the support felt. In both of these cases the web is separated from the felt by appropriate guide means as shown by the arrows and the small rolls for the departing felts 8 and 9 in the two embodiments.
- the pick-up roll is a positive one and the pressing roll in contact with it may also be positive. Both or one of the rolls of the pressing point after the straight felt part may be positive.
- the numbers of revolutions of the first and the second pressing points can be changed without gradation so that the speed of the felt at these points may be the same or greater at the first pressing point than at the second.
- Suction rolls rolls with different coatings, smooth rolls, or grooved rolls, in suitable combinations, can be used as pressing rolls, as in paper machines in general.
- An improved press section in a web forming machine of the type having at least two traveling endless felts for contacting and carrying the web which includes a pick-up roll urging a pick-up felt against the web for transferring the web to the felt, said pick-up felt passing around said pick-up roll and through a press nip for the pick-up felt defined between a press roll and said pick-up roll, a second press roll opposedly positioned to said pick-up roll and defining a second press nip between said pick-up roll and said second press roll through which the web, said pick-up felt and a support felt pass, the web being carried through said ing the web between said second and third press nips; one roll of each of said second and third press nips constituting a guiding roll for said support felt, and roll means for separating the web from the felt after said third press nip.
Abstract
Apparatus for transferring a paper web from a papermaking machine forming wire to a press section. A suction pick-up roll located adjacaent the forward run of the forming wire is wrapped in part by a first endless pick-up felt which picks the web up from the forming wire and carries it through the first press nip of the press section. Prior to contacting the paper web the first felt passes through a press nip (for liquid removal) formed between the suction pick-up roll and a press roll. A second felt (i.e., lower support felt) contacts the web carried by the first pick-up felt between the forming wire and press section.
Description
Umted States Patent [191 [111 3,861,996 Dorfel Jan. 21, 1975 [54] PAPER WEB TRANSFER SYSTEM 2,709,398 5 1955 Beachler 162/306 CARRYING THE WEB FROM FORMING 3,207,657 9/1965 Wagner et al. 162/361 X 3,526,574 9/l970 Beachler,etal..... 162/358 X WIRE T0 PRESS SECTION 3,629,056 l2/l971 Forrest 162/305 75 Inventor: Ge h d W lter D fl 1 fg "16h" f f g FOREIGN PATENTS OR APPLICATIONS [73] Assigneez A. Ahlstrom Osakeyhtio, 565,550 ll/l958 Canada 162/360 Noormarkhv Finland Primary Examiner-S. Leon Bashore [22] Filed: Mar. 16, 1971 Assistant ExaminerRichard H. Tushin [21] Appl No 124 766 Attorney, Agent, or Firm-Brooks, Haidt & Haffner [30] Foreign Application Priority Data [57] ABSTRACT Mar 7 1970 Finland 714/70 Apparatus for transferring a paper web from a papermaking machine forming wire to a press section. A [52] Cl. 162/274 162/306 162/358 suction pick-up roll located adjacaent the forward run 162/366 of the forming wire is wrapped in part by a first end- Inti. less pick-Up felt picks the Wb up from the [58] Field of 'i; 16 210 360 forming wire and carries it through the first press nip "fag of the press section. Prior to contacting the paper web the first felt passes through a press nip (for liquid re- [56] References Cited moval) formed between the suction pickup roll and a press roll. A second felt (i.e., lower support felt) UNITED STATES PATENTS contacts the web carried by the first pick-up felt belii ii a1 162/113 x en the forming wire and press section. 1 spaug 2,694,346 11/1954 Goodwillie 162/306 X 1 Claim, 6 Drawing Figures PATENTEDJANZHQYB 3.86139 SHEETIUF 2 Fig. 3
PATEMED 3.861.996
SHEET 2 BF 2 Fig. 5
PAPER WEB TRANSFER SYSTEM CARRYING THE WEB FROM FORMING WIRE TO PRESS SECTION BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to the field of pressing a fiber web in a press section.
2. Description of the Prior Art Various arrangements have been introduced previously for the pressing of a paper web. US. Pat. No. 2,911,040 introduces a pressing part which is situated at a distance from the pick-up roll in the moving direction of the paper. The arrangement introduced in this patent has, however, the disadvantage that the part of the felt between the pick-up point and the first pressing point is under tension and the wet paper web stretches in this area. This takes place, in spite of the fact that the pick-up roll and the pressing roll rotate at the same peripheral speed, since slipping of the felt occurs at the pick-up roll. Due to stretching of the paper web, an orientation of the fibers takes place in the longitudinal direction which diminishes the longitudinal elasticity of the finished paper. Owing to the different longitudinal and transversal orientations of the fibers the finished paper sheet will not remain even.
SUMMARY OF THE INVENTION According to the invention the pick-up felt is pressed against the pick-up roll by means of a press roll to eliminate slipping of the felt and stretching of the web.
The paper produced in accordance with the invention has better elasticity than paper manufactured by prior known methods.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates schematically a press section of a paper machine for carrying out the method according to the invention, and
FIGS. 2-6 illustrate schematically alternative embodiments of the press section.
DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 13 is the wire of the web-forming part, from where the suction roll 2 working as a pick-up roll moves the paper web 12 with the suction effect of the roll to the endless felt 8. The suction roll, together with roll 1, forms a press nip through which the felt 8 runs. The felt and the paper web run to roll 3 at a distance from roll 2; roll 3 and roll 4 together form another press nip, where liquid is pressed out of the paper web 12. Thereafter the paper web is separated from the felt and it runs to the next pressing point which is formed by roll 4 together with roll 5. A suitable roll combination is a suction roll 3, a stone roll 4, and a grooved roll 5. The direction of the movement of the paper web is illustrated by arrows.
Because the felt runs through two press nips at a distance from each other, with no slipping occuring at the pressing points, it is possible, by choosing a somewhat lower peripheral speed for roll 3 than for roll 2, to obtain a longitudinal shrinking of the felt and thus also of the paper web between the pressing points, in which case the elasticity of the finished paper increases. FIG. 1 also illustrates the drying and cleaning devices of the endless felt 8 and the respective devices 16 of the pressing felt l4.
To keep the felt and the paper track essentially horizontal between the pressing points, an endless, synchronically moving, wire 9 can be placed below them. An arrangement like this is illustrated in FIG. 2. FIG. 5 illustrates a corresponding arrangement in a case in which the rolls 6 and 7 of the supporting wire 9 participate in forming the pressing points.
The felt and the web can be supported in other ways as well. In the application according to FIG. 3, a suction box 10 has been fitted above the felt to keep the felt part horizontal. In the case according to FIG. 4, a blowing device 11 has been respectively fitted below the felt; this device creates a cushion of air to support the felt part.
The pair of rolls 1 and 2 forms the so-called washing press of the felt and removes from the felt liquid that has been absorbed by it. Because the paper web is supported between rolls 2 and 3, the felt can be relatively dry there, in which case the proportionate dryness of the paper web, also, will be high after the first pressing point.
According to another embodiment, shown in FIG. 6, the paper web travels from the upper pick-up felt 8 running around the pick-up roll 2, to the lower support felt 9 at the pressing point formed by pressing roll 6, which is inside the lower felt, together with the pick-up felt. The paper track, supported by the lower felt, runs to the next pressing point formed by pressing roll 7, which is inside the lower-felt loop, together with pressing roll 3, onto which the paper web moves following the pressing point. Thus the embodiment of FIGS. 5 and 6 have in common the passage of the upper pick-up felt alone through a press nip, a second press nip through which the web is passed between two felts, and a third nip through which the paper web passes along with the support felt. In both of these cases the web is separated from the felt by appropriate guide means as shown by the arrows and the small rolls for the departing felts 8 and 9 in the two embodiments.
On the straight part of the felt between the pressing points of shrinking, or in certain cases also a so-called microcreping, of the paper web can be obtained which improved the elasticity of the paper. The pick-up roll is a positive one and the pressing roll in contact with it may also be positive. Both or one of the rolls of the pressing point after the straight felt part may be positive. The numbers of revolutions of the first and the second pressing points can be changed without gradation so that the speed of the felt at these points may be the same or greater at the first pressing point than at the second.
Suction rolls, rolls with different coatings, smooth rolls, or grooved rolls, in suitable combinations, can be used as pressing rolls, as in paper machines in general.
What is claimed is:
1. An improved press section in a web forming machine of the type having at least two traveling endless felts for contacting and carrying the web, which includes a pick-up roll urging a pick-up felt against the web for transferring the web to the felt, said pick-up felt passing around said pick-up roll and through a press nip for the pick-up felt defined between a press roll and said pick-up roll, a second press roll opposedly positioned to said pick-up roll and defining a second press nip between said pick-up roll and said second press roll through which the web, said pick-up felt and a support felt pass, the web being carried through said ing the web between said second and third press nips; one roll of each of said second and third press nips constituting a guiding roll for said support felt, and roll means for separating the web from the felt after said third press nip.
Claims (1)
1. An improved press section in a web forming machine of the type having at least two traveling endless felts for contacting and carrying the web, which includes a pick-up roll urging a pick-up felt against the web for transferring the web to the felt, said pick-up felt passing around said pick-up roll and through a press nip for the pick-up felt defined between a press roll and said pick-up roll, a second press roll opposedly positioned to said pick-up roll and defining a second press nip between said pick-up roll and said second press roll through which the web, said pick-up felt and a support felt pass, the web being carried through said second press nip between said felts; a paiR of further press rolls located at a distance from said pickup roll, said pair of press rolls defining therebetween a third press nip through which said support felt and said web pass, the distance between said second press nip and said third press nip serving to eliminate slipping of the felt and stretching of the web; said support felt supporting the web between said second and third press nips; one roll of each of said second and third press nips constituting a guiding roll for said support felt, and roll means for separating the web from the felt after said third press nip.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI71470 | 1970-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3861996A true US3861996A (en) | 1975-01-21 |
Family
ID=8504530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US124766A Expired - Lifetime US3861996A (en) | 1970-03-17 | 1971-03-16 | Paper web transfer system carrying the web from forming wire to press section |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3861996A (en) |
| DE (1) | DE2112395A1 (en) |
| SE (1) | SE374150B (en) |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4016032A (en) * | 1972-11-30 | 1977-04-05 | Valmet Oy | Suction roll for transferring a web away from a press section |
| US4056433A (en) * | 1975-09-16 | 1977-11-01 | Valmet Oy | Ascending twin-wire paper machine without web pick-up |
| US4059482A (en) * | 1974-09-27 | 1977-11-22 | Valmet Oy | Paper machine pickup and crepe-setting press section |
| US4075056A (en) * | 1974-08-15 | 1978-02-21 | Beloit Corporation | Press section structure |
| US4086131A (en) * | 1975-05-06 | 1978-04-25 | Beloit Corporation | Method for pressing bagasse webs |
| US4110156A (en) * | 1976-06-14 | 1978-08-29 | Escher Wyss Limited | Compact press at the web transfer position of a paper making machine |
| US4113557A (en) * | 1976-04-14 | 1978-09-12 | Valmet Oy | Paper manufacturing structure particularly for detaching a web from a wire |
| US4163688A (en) * | 1972-11-30 | 1979-08-07 | Valmet Oy | Apparatus for dewatering in a paper machine |
| US4172759A (en) * | 1976-09-13 | 1979-10-30 | Valmet Oy | Paper-machine structure and method for subjecting a web to suction |
| US4188262A (en) * | 1972-11-30 | 1980-02-12 | Valmet | Method for dewatering paper in a paper machine press section |
| US4197158A (en) * | 1978-03-16 | 1980-04-08 | Beloit Corporation | Paper making machine press section |
| US4209361A (en) * | 1972-11-30 | 1980-06-24 | Valmet Oy | Method of multi-nip pressing in a paper machine |
| US4257844A (en) * | 1977-04-15 | 1981-03-24 | Beloit Corporation | Press section arrangement |
| US4285766A (en) * | 1977-04-25 | 1981-08-25 | Valmet Oy | Press method in a paper machine |
| US4551203A (en) * | 1984-04-02 | 1985-11-05 | Valmet Oy | Method and arrangement for guiding a paper web from the press section to the drying section |
| US4792381A (en) * | 1986-09-12 | 1988-12-20 | Valmet Oy | Closed and compact press section of a paper machine with double S shaped path or mirror image thereof |
| US4909905A (en) * | 1986-06-03 | 1990-03-20 | Valmet Paper Machinery Inc. | Closed press section of a paper machine and a frame construction for same |
| US4919762A (en) * | 1987-06-17 | 1990-04-24 | Valmet Paper Machinery Inc. | Press section and press section/frame construction combination in a paper machine |
| DE3942396A1 (en) * | 1988-12-23 | 1990-06-28 | Tampella Oy Ab | METHOD AND ARRANGEMENT FOR GUIDING A FIBER STRIP FROM A SCREEN THROUGH A PRESS PART |
| US5308450A (en) * | 1991-04-16 | 1994-05-03 | Sulzer Escher Wyss Gmbh | Press section of a papermaking machine |
| US5501775A (en) * | 1993-01-23 | 1996-03-26 | J. M. Voith Gmbh | Wet press for a paper making machine |
| US5520782A (en) * | 1993-01-23 | 1996-05-28 | J. M. Voith Gmbh | Method and apparatus for removing water from a web by means of presses |
| US5639351A (en) * | 1991-12-23 | 1997-06-17 | Valmet Corporation | Press section of a paper machine, in particular for printing paper qualities |
| US5670023A (en) * | 1993-05-29 | 1997-09-23 | Voith Sulzer Papiermaschinen Gmbh | Press of a paper machine for thin papers |
| US5792318A (en) * | 1996-11-18 | 1998-08-11 | Mancini; Ralph | Method to stabilize sheet between press section and dryer section of a paper-making machine |
| US5820731A (en) * | 1993-06-11 | 1998-10-13 | Valmet Corporation | Method and apparatus in a paper or board machine for dewatering the web |
| US5830321A (en) * | 1997-01-29 | 1998-11-03 | Kimberly-Clark Worldwide, Inc. | Method for improved rush transfer to produce high bulk without macrofolds |
| US5865954A (en) * | 1993-12-08 | 1999-02-02 | Valmet Corporation | Method for dewatering a web in a paper making machine employing an extended nip press |
| US5888354A (en) * | 1996-04-04 | 1999-03-30 | Valmet Corporation | Transfer of a web in a paper machine from a two-felt press nip to a dryer section |
| US5891308A (en) * | 1996-02-02 | 1999-04-06 | Beloit Technologies, Inc. | Method of pressing a paper web of tropical hardwood fibers |
| US6030499A (en) * | 1993-06-11 | 2000-02-29 | Valmet Corporation | Method and apparatus in a paper or board machine for dewatering the web |
| US6090244A (en) * | 1997-01-28 | 2000-07-18 | Voith Sulzer Papiermaschinen Gmbh | Press section |
| US6228216B1 (en) * | 1998-07-10 | 2001-05-08 | Kimberly-Clark Worldwide, Inc. | Transfer of a cellulosic web between spaced apart transport means using a moving air as a support |
| US6260287B1 (en) | 1997-08-08 | 2001-07-17 | Peter Walker | Wet web stability method and apparatus |
| US6368466B1 (en) * | 1993-12-08 | 2002-04-09 | Valmet Corporation | Press section of a paper making machine employing an extended nip press |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10149563A1 (en) * | 2001-10-08 | 2003-04-10 | Voith Paper Patent Gmbh | web guide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2043351A (en) * | 1935-06-01 | 1936-06-09 | Int Cellucotton Products | Method of making a tissue paper product |
| US2204426A (en) * | 1935-06-21 | 1940-06-11 | Sandusky Foundry And Machine C | Papermaking machine |
| US2694346A (en) * | 1950-03-25 | 1954-11-16 | Beloit Iron Works | Web transfer assembly |
| US2709398A (en) * | 1950-06-02 | 1955-05-31 | Beloit Iron Works | Suction transfer assembly with deckle edge control |
| US3207657A (en) * | 1963-01-22 | 1965-09-21 | Huyck Corp | Method and apparatus for making paper by contracting the forming carrier to compact the web |
| US3526574A (en) * | 1967-03-27 | 1970-09-01 | Beloit Corp | Vacuum transfer device in papermaking machine |
| US3629056A (en) * | 1969-04-03 | 1971-12-21 | Beloit Corp | Apparatus for forming high bulk tissue having a pattern imprinted thereon |
-
1971
- 1971-03-10 SE SE7103039A patent/SE374150B/xx unknown
- 1971-03-15 DE DE19712112395 patent/DE2112395A1/en active Pending
- 1971-03-16 US US124766A patent/US3861996A/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2043351A (en) * | 1935-06-01 | 1936-06-09 | Int Cellucotton Products | Method of making a tissue paper product |
| US2204426A (en) * | 1935-06-21 | 1940-06-11 | Sandusky Foundry And Machine C | Papermaking machine |
| US2694346A (en) * | 1950-03-25 | 1954-11-16 | Beloit Iron Works | Web transfer assembly |
| US2709398A (en) * | 1950-06-02 | 1955-05-31 | Beloit Iron Works | Suction transfer assembly with deckle edge control |
| US3207657A (en) * | 1963-01-22 | 1965-09-21 | Huyck Corp | Method and apparatus for making paper by contracting the forming carrier to compact the web |
| US3526574A (en) * | 1967-03-27 | 1970-09-01 | Beloit Corp | Vacuum transfer device in papermaking machine |
| US3629056A (en) * | 1969-04-03 | 1971-12-21 | Beloit Corp | Apparatus for forming high bulk tissue having a pattern imprinted thereon |
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209361A (en) * | 1972-11-30 | 1980-06-24 | Valmet Oy | Method of multi-nip pressing in a paper machine |
| US4163688A (en) * | 1972-11-30 | 1979-08-07 | Valmet Oy | Apparatus for dewatering in a paper machine |
| US4016032A (en) * | 1972-11-30 | 1977-04-05 | Valmet Oy | Suction roll for transferring a web away from a press section |
| US4188262A (en) * | 1972-11-30 | 1980-02-12 | Valmet | Method for dewatering paper in a paper machine press section |
| US4075056A (en) * | 1974-08-15 | 1978-02-21 | Beloit Corporation | Press section structure |
| US4059482A (en) * | 1974-09-27 | 1977-11-22 | Valmet Oy | Paper machine pickup and crepe-setting press section |
| US4086131A (en) * | 1975-05-06 | 1978-04-25 | Beloit Corporation | Method for pressing bagasse webs |
| US4056433A (en) * | 1975-09-16 | 1977-11-01 | Valmet Oy | Ascending twin-wire paper machine without web pick-up |
| US4113557A (en) * | 1976-04-14 | 1978-09-12 | Valmet Oy | Paper manufacturing structure particularly for detaching a web from a wire |
| US4110156A (en) * | 1976-06-14 | 1978-08-29 | Escher Wyss Limited | Compact press at the web transfer position of a paper making machine |
| US4172759A (en) * | 1976-09-13 | 1979-10-30 | Valmet Oy | Paper-machine structure and method for subjecting a web to suction |
| US4257844A (en) * | 1977-04-15 | 1981-03-24 | Beloit Corporation | Press section arrangement |
| US4285766A (en) * | 1977-04-25 | 1981-08-25 | Valmet Oy | Press method in a paper machine |
| US4197158A (en) * | 1978-03-16 | 1980-04-08 | Beloit Corporation | Paper making machine press section |
| US4551203A (en) * | 1984-04-02 | 1985-11-05 | Valmet Oy | Method and arrangement for guiding a paper web from the press section to the drying section |
| US4909905A (en) * | 1986-06-03 | 1990-03-20 | Valmet Paper Machinery Inc. | Closed press section of a paper machine and a frame construction for same |
| US4792381A (en) * | 1986-09-12 | 1988-12-20 | Valmet Oy | Closed and compact press section of a paper machine with double S shaped path or mirror image thereof |
| US4919762A (en) * | 1987-06-17 | 1990-04-24 | Valmet Paper Machinery Inc. | Press section and press section/frame construction combination in a paper machine |
| DE3942396A1 (en) * | 1988-12-23 | 1990-06-28 | Tampella Oy Ab | METHOD AND ARRANGEMENT FOR GUIDING A FIBER STRIP FROM A SCREEN THROUGH A PRESS PART |
| US5308450A (en) * | 1991-04-16 | 1994-05-03 | Sulzer Escher Wyss Gmbh | Press section of a papermaking machine |
| US5431787A (en) * | 1991-04-16 | 1995-07-11 | Sulzer-Escher Wyss Gmbh | Press section of a papermaking machine |
| US5639351A (en) * | 1991-12-23 | 1997-06-17 | Valmet Corporation | Press section of a paper machine, in particular for printing paper qualities |
| US5501775A (en) * | 1993-01-23 | 1996-03-26 | J. M. Voith Gmbh | Wet press for a paper making machine |
| US5520782A (en) * | 1993-01-23 | 1996-05-28 | J. M. Voith Gmbh | Method and apparatus for removing water from a web by means of presses |
| US5705034A (en) * | 1993-01-23 | 1998-01-06 | Voith Sulzer Papiermaschinen Gmbh | Method and apparatus for removing water from a web by means of presses |
| US5670023A (en) * | 1993-05-29 | 1997-09-23 | Voith Sulzer Papiermaschinen Gmbh | Press of a paper machine for thin papers |
| US5820731A (en) * | 1993-06-11 | 1998-10-13 | Valmet Corporation | Method and apparatus in a paper or board machine for dewatering the web |
| US6030499A (en) * | 1993-06-11 | 2000-02-29 | Valmet Corporation | Method and apparatus in a paper or board machine for dewatering the web |
| US5865954A (en) * | 1993-12-08 | 1999-02-02 | Valmet Corporation | Method for dewatering a web in a paper making machine employing an extended nip press |
| US6368466B1 (en) * | 1993-12-08 | 2002-04-09 | Valmet Corporation | Press section of a paper making machine employing an extended nip press |
| US5891308A (en) * | 1996-02-02 | 1999-04-06 | Beloit Technologies, Inc. | Method of pressing a paper web of tropical hardwood fibers |
| US5888354A (en) * | 1996-04-04 | 1999-03-30 | Valmet Corporation | Transfer of a web in a paper machine from a two-felt press nip to a dryer section |
| US5951821A (en) * | 1996-04-04 | 1999-09-14 | Valmet Corporation | Arrangement and method for transferring a web in a paper machine from a two-felt press nip to a dryer section |
| US5792318A (en) * | 1996-11-18 | 1998-08-11 | Mancini; Ralph | Method to stabilize sheet between press section and dryer section of a paper-making machine |
| US6090244A (en) * | 1997-01-28 | 2000-07-18 | Voith Sulzer Papiermaschinen Gmbh | Press section |
| US5830321A (en) * | 1997-01-29 | 1998-11-03 | Kimberly-Clark Worldwide, Inc. | Method for improved rush transfer to produce high bulk without macrofolds |
| US6260287B1 (en) | 1997-08-08 | 2001-07-17 | Peter Walker | Wet web stability method and apparatus |
| US6228216B1 (en) * | 1998-07-10 | 2001-05-08 | Kimberly-Clark Worldwide, Inc. | Transfer of a cellulosic web between spaced apart transport means using a moving air as a support |
Also Published As
| Publication number | Publication date |
|---|---|
| SE374150B (en) | 1975-02-24 |
| DE2112395A1 (en) | 1971-10-07 |
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