US3775243A - Water saveall for grooved roll in paper machine press nip - Google Patents
Water saveall for grooved roll in paper machine press nip Download PDFInfo
- Publication number
- US3775243A US3775243A US00042062A US3775243DA US3775243A US 3775243 A US3775243 A US 3775243A US 00042062 A US00042062 A US 00042062A US 3775243D A US3775243D A US 3775243DA US 3775243 A US3775243 A US 3775243A
- Authority
- US
- United States
- Prior art keywords
- press
- saveall
- nip
- extending
- roll
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0272—Wet presses in combination with suction or blowing devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/07—Water collectors, e.g. save-alls
Definitions
- the saveall is formed with a planar bottom wall which extends away from the press nip in closely spaced relationship to the inner surface of the felt, a semicylindrical top wall which curves away from the felt back toward the grooved roll and a series of internal baffles which extend from the bottom and top walls inwardly of the saveall to both stiffen the unit and form a series of upwardly opening troughs which collect liquid expressed from the grooved roll at the ingoing side of the press nip.
- suction devices are mounted on the ingoing side of the press nip to create a back flow of air through the nip to help remove liquid from the grooves into the suction devices. Additionally, the suction devices are provided with teeth which extend into the grooves to continuously doctor these portions of the roll. It will be apparent, however, that not only does the use of suction devices increase the power requirements of the system, but the use of fingers extending into the grooves of the rolls requires very precise manufacturing tolerances to prevent breakage or excessive wear of these interfitting components of the press assembly.
- the grooves in the grooved roll will usually be desirable to 'form the grooves in the grooved roll as one or more spirally extending grooves rather than a series of parallel, radially extending grooves to prevent excessive localized wear where the grooved roll is in continuous contact with a member such as a papermaking felt, and it will be seen that if this expedient is practiced it is impossible to utilize a plurality of stationary fingers projecting into the grooves to doctor liquid therefrom.
- the present invention recognizes the fact that .the forces generated adjacent the ingoing side of the press nip cause liquid to be ejected from the grooves of the grooved roll without the necessity of suction devices, air jets and the like. .Thus, the present invention provides a saveall construction which is extremely compact and self-supporting and which is mounted adjacent the ingoing side of the press nip between a press felt wrapping the grooved roll and the surface of the groovedroll.
- the interior of the saveall is provided with a series of internal baffles which extend inwardly of the saveall away from the press nip and serve to both stiffen the saveall to provide a self-supporting unit and define a series of troughs which collect liquid expressed from the grooves of the grooved press roll and permit this liquid to be carried away from the press nip.
- FIG. 1 is an elevational view showing a press assembly in accordance with the present invention
- FIG. 2 is a view of a portion of a grooved press roll of FIG. I;
- FIG. 3 is a front elevational view of the saveall of FIG. 1;
- FIG. 4 is a view takerr on.-line 4--4 of FIG. 3;
- FIG. 5 is a view takeii on line 5--5 of FIG. 3;
- FIG. 6 is a view taken on line 6-6 of FIG. 3;
- FIG. 7 is a view taken on line 7-7 of FIG. 3;
- FIG. 8 is a view of a component of the saveall.
- a press assembly may comprise a first press roll 10, which conveniently may be formed as a suction roll.
- Roll 10 is wrapped by a felt 11 and forms a first press nip with a second press roll 13 which conveniently may be a smooth surfaced, granite roll.
- Roll 12 in turn forms a second press nip with an additional press roll 13 which, as seen in FIG. 2, is of grooved construction having a groove or series of grooves 16.
- Press roll 13 is wrapped by a porous belt 14, such as a papermaking felt, which also wraps a turning roll 15 downstream of the second press nip and the saveall 20 of the present invention is mounted at the ingoing side of the second press nip between the surface of the grooved roll 13 and the inner surface of the felt 14.
- a web W of paper or the like enters the press assembly from a right-hand side as seen in FIG. 1 and is trained about the various rolls of the press assembly in the direction indicated by the arrows.
- the saveall includes a substantially planar bottom wall 21 which has its lower edge positioned adjacent the ingoing side of the press nip formed by the rolls 12 and 13 and extends upstream away from the nip in closely spaced relationship to the inner surface of the porous belt 14.
- a semi-cylindrical top wall 22 has one longitudinal edge thereof attached to the upper longitudinal edge of the bottom wall 21 to, in effect, form a continuation of the bottom wall 21 which extends in a direction away from the belt 14 and terminates in a second longitudinal edge 23 positioned adjacent the surface of the grooved press roll 13.
- a first planar baffle wall 24 has its lower edge attached by welding or the like to the lower edge of the bottom wall 21 and extends upwardly away from the lower edge of the bottom wall in diverging relationship thereto to form a first trough 25.
- a second planar internal baffle 26 has its lower edge attached to the bottom wall 21 intermediate the longitudinal edges thereof as by welding or the like to form a second trough 27.
- Mounted on the edge 23 of the semi-cylindrical upper wall 22 is a third planar internal baffle 28 which, with a portion of the top wall 22, forms a trough 29.
- baffle 24 Extending from the upper edge 30 of baffle 24 to an intermediate portion of the baffle 26 are a series of plate-like struts 31, only one of which is shown, which are interconnected to the baffles 24 and 26 to provide additional rigidity to the unit. From the upper end 32 of the baffle 26 a second series of plate-like struts 33 are mounted and interconnected, by welding or the like, to an upper portion of the bottom wall 21. Similarly, a third series of struts 34 extend between portions of the top wall 22 and the internal baffle 28.
- a plate member 40 having a cut-out portion 41 of the same general configuration as the cross sectional configuration of the bottom wall 21 and the baffle 24, is attached to the saveall construction thus far described adjacent one end thereof, as best seen in FIG. 3.
- a conduit 46 is attached to the walls 40, 42, 43 and 44 for draining the header 45 while a cover plate 47 closes off the right-hand side, as seen in FIG. 3, of the saveall and a shroud 48 encloses the upper portion thereof.
- a partially dewatered web W of paper or the like is carried into the press assembly by the felt 11 and then through the first press nip formed by the rolls and 12. From the first press nip the web is trained about roll 12 in the direction indicated by the arrows and then through the nip formed by the roll 12 and the grooved roll 13 and thence, around a turning roller 15, from which it is directed into further press sections, dryers, or the like.
- any portion of the liquid which is not trapped in the troughs 25 and 27 but instead is thrown upwardly against the inner surface of the top wall 22 will either drop from the top wall 22 into one of the troughs 25 or 27 or will continue around and become entrapped in the trough formed by the baffle 28 and the adjacent portion of the top wall 22.
- a press assembly comprising a first press roll having a substantially circumferentially grooved surface, a second press roll forming with said first press roll a press nip having ingoing and outgoing sides, an endless porous belt passing through said nip and in contact therewith in said press nip, a saveall mounted adjacent said ingoing side of said press nip between said first press roll and said porous belt upstream of the point of contact therebetween for collecting liquid expressed at said nip, said saveall including a substantially planar bottom wall having a lower edge positioned adjacent said ingoing side of said nip and extending upstream away from said nip in closely spaced relationship to an inner surface of said porous belt, a planar baffle extending upwardly from said lower edge of said bottom wall in diverging relationship thereto, a substantially cylindrical top wall having a first longitudinal edge joined to and extending from an upper edge of said bottom wall in a direction away from said pourous belt and terminating in a second longitudinal edge overhanging said bottom wall and
- the apparatus of claim 1 further comprising a series of plate-like struts extending between and interconnected with said baffles and adjacent wall surfaces strengthening said saveall and forming a substantially self-supporting structure.
- the apparatus of claim 1 further comprising a substantially planar baffle having a lower edge attached to an intermediate portion of said bottom wall and extending in diverging relationship thereto in a direction away from said press nip and terminating in an upper longitudinal edge positioned in spaced relationship to said inner surface of said top wall.
- the apparatus of claim 3 further comprising a series of plate-like struts extending between and interconnected with said baffles and adjacent wall surfaces strengthening said saveall and forming a substantially self-supporting structure.
- draining means comprises an end closure member extending across and attached to one end of said top and bottom walls and said baffles, and a header attached to the opposite ends of said top and bottom walls and said baffles and draining troughs formed by said bafiles and said top and bottom walls.
- a press assembly comprising a first press roll having a substantially circumferentially grooved surface, a second press roll forming with said first press roll a press nip having ingoing and outgoing sides, an endless porous belt, means guiding said belt in a downwardly extending run through said nip in contact therewith, a saveall mounted adjacent said ingoing side of said press nip between said first press roll and said porous belt upstream and above the point of contact therebetween, said saveall including a substantially planar bottom wall having a lower edge positioned adjacent said ingoing side of said nip sloping upwardly away from said nip in closely spaced relationship to an inner surface of said porous belt and terminating in an upper edge positioned above said nip, a planar baffle extending upwardly from said lower edge of said bottom wall in diverging relationship thereto, a substantially cylindrical top wall having a first longitudinal edge joined to and extending from said upper edge of said bottom wall in a direction upwardly and away from said porous belt, the
Landscapes
- Paper (AREA)
Abstract
Description
Claims (5)
- 2. The apparatus of claim 1 further comprising a series of plate-like struts extending between and interconnected with said baffles and adjacent wall surfaces strengthening said saveall and forming a substantially self-supporting structure.
- 3. The apparatus of claim 1 further comprising a substantially planar baffle having a lower edge attached to an intermediate portion of said bottom wall and extending in diverging relationship thereto in a direction away from said press nip and terminating in an upper longitudinal edge positioned in spaced relationship to said inner surface of said top wall.
- 4. The apparatus of claim 3 further comprising a series of plate-like struts extending between and interconnected with said baffles and adjacent wall surfaces strengthening said saveall and forming a substantially self-supporting structure.
- 5. The apparatus of claim 1 wherein said draining means comprises an end closure member extending across and attached to one end of said top and bottom walls and said baffles, and a header attached to the opposite ends of said top and bottom walls and said baffles and draining troughs formed by said baffles and said top and bottom walls.
- 6. A press assembly comprising a first press roll having a substantially circumferentially grooved surface, a second press roll forming with said first press roll a press nip having ingoing and outgoing sides, an endless porous belt, means guiding said belt in a downwardly extending run through said nip in contact therewith, a saveall mounted adjacent said ingoing side of said press nip between said first press roll and said porous belt upstream and above the point of contact therebetween, said saveall including a substantially planar bottom wall having a lower edge positioned adjacent said ingoing side of said nip sloping upwardly away from said nip in closely spaced relationship to an inner surface of said porous belt and terminating in an upper edge positioned above said nip, a planar baffle extending upwardly from said lower edge of said bottom wall in diverging relationship thereto, a substantially cylindrical top wall having a first longitudinal edge joined to and extending from said upper edge of said bottom wall in a direction upwardly and away from said porous belt, thence downwardly and toward said first press roll and terminating adjacent said first press roll in a second longitudinal edge overhanging said bottom wall and said baffle, and means for draining from said saveall liquid collected therein.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4206270A | 1970-06-01 | 1970-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3775243A true US3775243A (en) | 1973-11-27 |
Family
ID=21919841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00042062A Expired - Lifetime US3775243A (en) | 1970-06-01 | 1970-06-01 | Water saveall for grooved roll in paper machine press nip |
Country Status (4)
Country | Link |
---|---|
US (1) | US3775243A (en) |
AU (1) | AU2874371A (en) |
CA (1) | CA946664A (en) |
GB (1) | GB1348524A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6716315B2 (en) * | 2000-01-14 | 2004-04-06 | Voith Paper Patent Gmbh | Water draining device |
WO2012113467A1 (en) * | 2011-02-23 | 2012-08-30 | Voith Patent Gmbh | Press section of a machine for producing a fibrous web |
US20150330021A1 (en) * | 2014-05-15 | 2015-11-19 | Gapcon Gmbh | Compact Former Section |
CN108203891A (en) * | 2016-12-20 | 2018-06-26 | Pmt意大利股份有限公司 | Pressing device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2858747A (en) * | 1955-02-07 | 1958-11-04 | Wagner Rudolf Ernst | Rotary presses and the like |
US3098788A (en) * | 1961-04-18 | 1963-07-23 | Beloit Iron Works | Liquid removal means for rotatable perforated shells |
US3198694A (en) * | 1964-12-10 | 1965-08-03 | Beloit Corp | Press roll assemblies in paper making machine |
US3198693A (en) * | 1964-08-21 | 1965-08-03 | Beloit Corp | Scavenging means for grooved press rolls |
US3355350A (en) * | 1964-12-18 | 1967-11-28 | Allis Chalmers Mfg Co | Paper machine |
-
1970
- 1970-06-01 US US00042062A patent/US3775243A/en not_active Expired - Lifetime
-
1971
- 1971-05-06 CA CA112,320A patent/CA946664A/en not_active Expired
- 1971-05-11 AU AU28743/71A patent/AU2874371A/en not_active Expired
- 1971-05-18 GB GB1565671*[A patent/GB1348524A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2858747A (en) * | 1955-02-07 | 1958-11-04 | Wagner Rudolf Ernst | Rotary presses and the like |
US3098788A (en) * | 1961-04-18 | 1963-07-23 | Beloit Iron Works | Liquid removal means for rotatable perforated shells |
US3198693A (en) * | 1964-08-21 | 1965-08-03 | Beloit Corp | Scavenging means for grooved press rolls |
US3198694A (en) * | 1964-12-10 | 1965-08-03 | Beloit Corp | Press roll assemblies in paper making machine |
US3355350A (en) * | 1964-12-18 | 1967-11-28 | Allis Chalmers Mfg Co | Paper machine |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6716315B2 (en) * | 2000-01-14 | 2004-04-06 | Voith Paper Patent Gmbh | Water draining device |
US20040173332A1 (en) * | 2000-01-14 | 2004-09-09 | Voith Paper Patent Gmbh | Water draining device |
US7189309B2 (en) | 2000-01-14 | 2007-03-13 | Voith Paper Patent Gmbh | Water draining device |
WO2012113467A1 (en) * | 2011-02-23 | 2012-08-30 | Voith Patent Gmbh | Press section of a machine for producing a fibrous web |
CN103403252A (en) * | 2011-02-23 | 2013-11-20 | 沃依特专利有限责任公司 | Press section of a machine for producing a fibrous web |
CN103403252B (en) * | 2011-02-23 | 2016-08-17 | 沃依特专利有限责任公司 | For manufacturing the press section of the machine of web of fiber |
EP2678471B1 (en) | 2011-02-23 | 2018-03-14 | Voith Patent GmbH | Press section of a machine for producing a fibrous web |
US20150330021A1 (en) * | 2014-05-15 | 2015-11-19 | Gapcon Gmbh | Compact Former Section |
US9822485B2 (en) * | 2014-05-15 | 2017-11-21 | Gapcon S.R.L. | Compact former section |
CN108203891A (en) * | 2016-12-20 | 2018-06-26 | Pmt意大利股份有限公司 | Pressing device |
Also Published As
Publication number | Publication date |
---|---|
GB1348524A (en) | 1974-03-20 |
CA946664A (en) | 1974-05-07 |
AU2874371A (en) | 1972-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WALTER E. HELLER & COMPANY, INC., 101 PARK AVE., N Free format text: SECURITY INTEREST;ASSIGNOR:BLACK CLAWSON COMPANY, THE;REEL/FRAME:004250/0792 Effective date: 19840130 |
|
AS | Assignment |
Owner name: BLACK CLAWSON COMPANY THE Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:HELLER FINANCIAL, INC. F/K/A/ WALTER E. HELLER & COMPANY INC.;REEL/FRAME:004628/0875 Effective date: 19861015 |
|
AS | Assignment |
Owner name: CHEMICAL BANK, AS AGENT Free format text: SECURITY INTEREST;ASSIGNORS:BLACK CLAWSON COMPANY, THE, AN OH CORP.;HYDROTILE MACHINERY COMPANY, ANIOWA CORPORATION;REEL/FRAME:004930/0102 Effective date: 19880601 |
|
AS | Assignment |
Owner name: BANK ONE, DAYTON, NATIONAL ASSOCIATION Free format text: SECURITY INTEREST;ASSIGNOR:CHEMICAL BANK;REEL/FRAME:005319/0279 Effective date: 19900208 |
|
AS | Assignment |
Owner name: BLACK CLAWSON COMPANY, NEW YORK Free format text: RELEASED BY SECURED PARTY;ASSIGNORS:BANK ONE, DAYTON, NATIONAL ASSOCIATION;CENTRAL TRUST COMPANY, N.A.;DNC AMERICA BANKING CORPORATION;REEL/FRAME:006414/0133 Effective date: 19921116 Owner name: HYDROTILE MACHINERY COMPANY (NOW KNOWN AS BC MANUF Free format text: RELEASED BY SECURED PARTY;ASSIGNORS:BANK ONE, DAYTON, NATIONAL ASSOCIATION;CENTRAL TRUST COMPANY, N.A.;DNC AMERICA BANKING CORPORATION;REEL/FRAME:006414/0133 Effective date: 19921116 |