US3839143A - Multi-ply two wire former wherein multiple headboxes are used and inflatable air bellows provide adjustments therebetween - Google Patents
Multi-ply two wire former wherein multiple headboxes are used and inflatable air bellows provide adjustments therebetween Download PDFInfo
- Publication number
- US3839143A US3839143A US00260808A US26080872A US3839143A US 3839143 A US3839143 A US 3839143A US 00260808 A US00260808 A US 00260808A US 26080872 A US26080872 A US 26080872A US 3839143 A US3839143 A US 3839143A
- Authority
- US
- United States
- Prior art keywords
- forming
- stock
- slice
- throat
- ply
- 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
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
- D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
Definitions
- A1r inflatable bellows are 2,098,733 11/1937 162/130 connected between the inner slice lips of the outer 2,881,668 4/1959 Thomas 162 203 headbexes d t slice walls of the intermediate 2,911,039 11/1959 Hornbostel et a1. 162/303 headbox to control the thicknesses of'the outer plys. 2,928,464 3/1960 Western et al 162/347 3,607,625 9 1971 Hill et a1.
- the invention relates to improvements in methods and structures for making multi-ply web and particularly to a paper making machine wherein the web is formed of layers of stock with the layers having different characteristics.
- each ply should be well formed and perform its function to contribute to the characteristic of the board as a whole. For this purpose it is desirable to avoid mixing of the plys and yet it is essential that the plys bond to each other with optimum strength.
- Multi-ply board has been conventionally made by various processes and primarily by being made on cylinder machines where successive plys are formed on cylinders immersed in slurries of stock and with the stock layer being formed on the uprunning side of the cylinder as it emerges from the vat of the slurry. As each successive layer is formed, it is fed onto the top of a layer formed in another cylinder until the requisite number of layers are completed.
- An object of the present invention is to provide an improved method of making multi-ply web wherein a better intermediate layer is formed with better fiber distribution for improved qualities of strength and uniformity.
- a further object of the invention is to provide a multi-ply web making machine wherein the intermediate layer and the outer layers are formed substantially simultaneously with the intermediate layer being dewatered through the outer layers for improved bonding between layers, and with the intermediate layer formed of a higher consistency stock to reduce the amount of water which must flow through the outer layers.
- a further object of the invention is to provide a mechanism for making multi-ply web wherein the plys are formed of different stock slurries which are dewatered substantially at the same time and wherein intermixing between the slurries is maintained at a minimum.
- a feature of the present invention is the provision of a twin wire forming machine wherein outer layers are fed into a forming throat slightly in advance of the intermediate layer to prevent intermixing and the intermediate layer is fed into the throat after the dry line of the outer layers and is provided with a high consistency stock with means preventing flocculation of the high consistency stock.
- the mechanism includes first and second looped continuous forming wires 10 and 11.
- the wires are strung over supports so that they come together to form a dewatering run 12. Upstream of the dewatering run is a converging throat 13.
- the wires travel through an arcuate path over a box 15 having a plurality of cross-machine extending foils 15a which are spaced in the machine direction so that the wires actually extend in sequential chordal spans between the foils.
- the wires gradually converge applying normal pressure to the layers of stock therebetween and water passes out through both sides of the wires 10 and 11 along the dewartering run 12.
- a suction box 25 within the wires 11 for additional dewatering Following the box 15 is a suction box 25 within the wires 11 for additional dewatering, and the web will follow the wire 11 around a couch roll 16 which has a suction gland 16a.
- the web will be picked off of the wire 11 by a pick-up roll 17 having a suction gland 17a therein and carrying a pickup felt 18.
- the wire 11 is additionally trained over return and tension rolls l9 and 20.
- the wire 10 wraps up over the couch roll 16 being trained thereover by its couch roll 21, and it returns over a roll such as 22.
- the wires 10 and 11 are carried into the forming throat 13 over breast rolls 23 and 24.
- suction rolls 23 and 24 have the usual perforate rotary shell structure, and the sequential glands are each connected to their own source of suction for drawing water through the shell and applying suction to the layer of slurry deposited on the wires to form the outer layers of the multi-ply web.
- suction is applied so that it increases from 24a through 240, and similarly so that it increases from 23a to 230.
- the first outer layer of the multi-ply web is formed by stock delivered through a slice opening 29 and the opposite outer layer of the web is formed by stock delivered through a slice opening 31.
- the slice opening 29 is formed between slice lips 39 and 40.
- the slice opening 31 is formed between slice lips 41 and 42.
- the inner slice lips 40 and 42 extend for some distance into the forming throat to guide the stock and aid in its initial formation on the wires and 11.
- the intermediate layer of stock is delivered through a slice opening 30 between the outer openings 29 and 311..
- Stock for the intermediate layer is provided from a headbox 26.
- Stock for the outer layers is provided from headboxes 27 and 28. Separate flows of stock are delivered to the separate headboxes 27 and 28 through separate supply lines 27b and 28b as shown schematically in the drawing.
- the headboxes 27 and 28 have flow tubes 27a and 28a respectively extending in the direction of stock flow for orienting the flow of the slurry and helping maintain uniform fiber distribution in the stock.
- the intermediate headbox similarly has a plurality of flow tubes 32 extending in the direction of stock flow and maintaining turbulence and energy in the stock.
- the stock supplied to the intermediate headbox is preferably a high consistency stock inasmuch as it is dewatered through the outer plys which are placed onto the forming wires in advance of the discharge of the intermediate jet of stock through the slice opening 30.
- the slice openings 29 and 311 are positioned to first deliver onto the wires and the dewatering effect through the wires is such that the intermediate layer is delivered into the throat to engage the outer layers after their dry line has been formed. This insures adequate formation of the outer layers so that there is not a mixing of the stock forming the plys.
- a tapered slice chamber leading to the slice opening 30 is provided by the tapering slice walls 33 and 34 for the intermediate headbox 26.
- a plate 35 with a plurality of flow distribution openings therethrough.
- This plate provides a support for a plurality of cross-machine extending flexible trailing elements 36.
- These trailing elements are of plastic or similar flexible material and are anchored at their upstream ends only with their downstream ends self-positioned by the pressures of the flowing stock within the slice.
- the trailing elements 36 may be continuous sheets extending in a cross-machine direction, or may be divided into separate strands. They are preferably uniform in cross section, but may be tapered in a downstream direction. Suitable means are provided for attaching the trailing elements to the upstream plate 35 in such a manner that pockets are not formed where concentrations of fibers can collect.
- Suitable stock delivery means are provided for each of the headboxes, and these will be fully understood by those versed in the art and are omitted from the drawings for the sake of clarity.
- the intermediate headbox 26 is rigidly supported and has rigid outer walls 37 and 38. These walls support operating mechanisms for positioning the inner slice lips 40 and 42 of the slices for the outer headboxes. These operating mechanisms are shown preferably in the form of air inflatable bellows or diaphragms 43 and 44 which extend continuously in a cross-machine direction to provide uniform support to the movable walls which position the slice lips 40 and 42. Air at a controlled pressure is directed into these bellows 43 and 44 to adjust the position of the slice lips 40 and 42 and thereby control the thickness of the outer layers.
- the slice walls 33 and 34 or the distal end which controls the size of the slice opening 30 is movable by a mechanism not shown to control the thickness of the intermediate ply for the web.
- the multi-ply web formed is of improved strength in that it obtains optimum preformance from the intermediate ply which usually is formed of an inexpensive low quality stock, and with the present arrangement, a high consistency stock is employed for improved dewatering efficiency and yet flocculation is avoided and good fiber distribution is attained.
- a forming mechanism for forming a multi-ply continuous fibrous web comprising in combination,
- first and second looped forming wires positioned to provide a dewatering run therebetween with the wires converging to form a throat at the upstream end of said run
- an intermediate headbox having a slice opening for delivering a jet of stock slurry to the throat for forming an intermediate ply of said web
- a first outer headbox having a slice opening for delivering a jet of stock slurry to the throat outwardly of the intermediate slice opening for forming an outer layer
- a second outer headbox having a slice opening for delivering a jet of stock slurry to the throat on the opposite side of the intermediate slice opening for forming an outer layer, and first and second separate stock supply means connected respectively for delivering separate supplies of stock to said first and second headboxes,
- said slice openings of said first and second outer headboxes positioned for delivery of the stock to the throat at a position upstream relative to the intermediate headbox slice opening so that a dry line appears before the intermediate jet of stock engages the outer layers of the stock on the wires.
- a forming mechanism for forming a multi-ply continuous fibrous web constructed in accordance with claim 1 wherein said breast rolls are provided with suction glands therein and having an outer perforate rotating shell for drainage of water through the rolls.
- a forming mechanism for forming a multi-ply continuous fibrous web constructed in accordance with claim 2 wherein each of said breast rolls has a series of separate suction glands to provide successive different negative pressures within the suction rolls for dewatering the outer layers of the web.
- a forming mechanism for forming a multi-ply continuous fibrous web constructed in accordance with claim 1 wherein said outer headboxes each have a movable slice lip adjacent the intermediate headbox with means for moving said lips to adjust the slice opening of said outer headboxes.
- a forming mechanism for forming a multi-ply continuous fibrous web constructed in accordance with claim 4 wherein said means for moving said movable slice lips of the outer headboxes is a control mechanism mounted on the walls of said intermediate headbox.
- a forming mechanism for forming a'multi-ply continuous fibrous web constructed in accordance with claim 5 wherein said slice lip moving mechanism consists of air bags mounted on the outer walls of said intermediate headbox.
- a forming mechanism for forming a multi-ply continuous fibrous web constructed in accordance with claim 1 wherein said intermediate headbox has an elongate tapered slice chamber leading to its slice opening with a plurality of flexible trailing elements in said tapered slice chamber supported only at their upstream ends and positioned downstream of their support solely by the pressures of the stock in the slice chamber.
- each of said headboxes has a plurality of separate flow passages extending in the direction of stock flow toward the slice opening.
- said intermediate jet of stock being delivered into the throat at a location after the appearance of a dry line through the outer layers on the forming wires.
Landscapes
- Paper (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00260808A US3839143A (en) | 1972-06-08 | 1972-06-08 | Multi-ply two wire former wherein multiple headboxes are used and inflatable air bellows provide adjustments therebetween |
GB2433373A GB1418057A (en) | 1972-06-08 | 1973-05-22 | Method and apparatus for forming a fibrous web of three or more plies |
AR248241A AR196668A1 (es) | 1972-06-08 | 1973-05-28 | Mecanismo de formacion para formar una red fibrosa continua de capas multiples |
ZA733652A ZA733652B (en) | 1972-06-08 | 1973-05-29 | Multi-ply two wire former |
FI1724/73A FI61217C (fi) | 1972-06-08 | 1973-05-29 | Flerskiktsformare med tvao viror |
BE131637A BE800178A (fr) | 1972-06-08 | 1973-05-29 | Dispositif a deux toiles de formation d'une feuille continue a plusieurs jets, |
SE7307778A SE397549B (sv) | 1972-06-08 | 1973-06-01 | Anordning for framstellning av en flerskiktad kontinuerlig fibermaterialbana |
JP7360981A JPS5214331B2 (xx) | 1972-06-08 | 1973-06-01 | |
ES415529A ES415529A1 (es) | 1972-06-08 | 1973-06-04 | Perfeccionamientos introducidos en un mecanismo de forma- cion para formar una red fibrosa continua de capas multi- ples. |
NL7307840A NL7307840A (xx) | 1972-06-08 | 1973-06-05 | |
FR7321562A FR2187990B1 (xx) | 1972-06-08 | 1973-06-06 | |
BR4215/73A BR7304215D0 (pt) | 1972-06-08 | 1973-06-06 | Mecanismo e processo de formacao para formar uma tela fibrosa continua de camadas multiplas |
CA173,507A CA971407A (en) | 1972-06-08 | 1973-06-07 | Two wire former for making multiply paper |
AU56736/73A AU5673673A (en) | 1972-06-08 | 1973-06-08 | Multiply two wire former |
DE2329658A DE2329658C3 (de) | 1972-06-08 | 1973-06-09 | Doppelsiebpapiermaschine zur Herstellung einer mehrlagigen Papierbahn |
IT25192/73A IT990621B (it) | 1972-06-08 | 1973-06-12 | Tela formatrice doppia per la fabbricazione di un nastro di carta a piu strati |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00260808A US3839143A (en) | 1972-06-08 | 1972-06-08 | Multi-ply two wire former wherein multiple headboxes are used and inflatable air bellows provide adjustments therebetween |
Publications (1)
Publication Number | Publication Date |
---|---|
US3839143A true US3839143A (en) | 1974-10-01 |
Family
ID=22990703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00260808A Expired - Lifetime US3839143A (en) | 1972-06-08 | 1972-06-08 | Multi-ply two wire former wherein multiple headboxes are used and inflatable air bellows provide adjustments therebetween |
Country Status (16)
Country | Link |
---|---|
US (1) | US3839143A (xx) |
JP (1) | JPS5214331B2 (xx) |
AR (1) | AR196668A1 (xx) |
AU (1) | AU5673673A (xx) |
BE (1) | BE800178A (xx) |
BR (1) | BR7304215D0 (xx) |
CA (1) | CA971407A (xx) |
DE (1) | DE2329658C3 (xx) |
ES (1) | ES415529A1 (xx) |
FI (1) | FI61217C (xx) |
FR (1) | FR2187990B1 (xx) |
GB (1) | GB1418057A (xx) |
IT (1) | IT990621B (xx) |
NL (1) | NL7307840A (xx) |
SE (1) | SE397549B (xx) |
ZA (1) | ZA733652B (xx) |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3944464A (en) * | 1974-05-10 | 1976-03-16 | International Paper Company | Forming section for twin-wire papermaking machine |
US3970514A (en) * | 1974-02-15 | 1976-07-20 | Oy Tampella Ab | Combination-paper machine |
US4021295A (en) * | 1975-05-05 | 1977-05-03 | Beloit Corporation | Method and apparatus for supplying white water from a single silo in the formation of a multi-ply web |
US4036684A (en) * | 1975-08-04 | 1977-07-19 | Beloit Corporation | High bulk tissue forming and drying apparatus |
DE2732361A1 (de) * | 1976-07-16 | 1978-01-26 | Beloit Corp | Steuervorrichtung fuer einen stoffauflaufkasten mit mehreren kanaelen fuer eine papiermaschine zur herstellung von mehrlagigen papierbahnen |
US4113557A (en) * | 1976-04-14 | 1978-09-12 | Valmet Oy | Paper manufacturing structure particularly for detaching a web from a wire |
US4125428A (en) * | 1977-06-27 | 1978-11-14 | The Black Clawson Company | Vertical twin wire paper machine |
DE2824608A1 (de) * | 1977-07-13 | 1979-01-25 | Tampella Oy Ab | Speiseapparat in einer bahnbildungsmaschine zur herstellung einer zwei- oder mehrschichtigen faserbahn |
WO1981002903A1 (en) * | 1980-04-11 | 1981-10-15 | Valmet Oy | Headbox for a paper machine |
DE3221212A1 (de) * | 1981-06-04 | 1982-12-23 | Aktiebolaget Bofors, 69180 Bofors | Filter und verfahren zu seiner herstellung |
US4376012A (en) * | 1979-04-12 | 1983-03-08 | Beloit Corporation | Method of forming a multi-ply web from paper stock |
US4376014A (en) * | 1979-04-12 | 1983-03-08 | Beloit Corporation | Headbox for forming multi-ply sheets |
US4414061A (en) * | 1975-02-20 | 1983-11-08 | Australian Paper Manufacturers Limited | Twin wire paper forming apparatus |
WO1984003112A1 (en) * | 1983-02-10 | 1984-08-16 | Scott Paper Co | Method and apparatus for producing paper and other nonwoven fibrous webs |
US4526653A (en) * | 1981-12-01 | 1985-07-02 | Kmw Aktiebolag | Control system for a multilayer headbox using an ultrasonic transducer |
US4539073A (en) * | 1981-12-01 | 1985-09-03 | Kmw Aktiebolag | Method and apparatus for measuring the size of a discharge slot in a headbox |
US4609435A (en) * | 1984-01-20 | 1986-09-02 | Valmet Oy | Process and equipment in the forming of paper web |
US4735686A (en) * | 1985-06-07 | 1988-04-05 | Valmet Oy | Twin-wire former and method for forming a paper web with steam implosion |
US4781793A (en) * | 1986-07-04 | 1988-11-01 | Valmet Oy | Method for improving paper properties in multiply paper using long and short fiber layers |
US4790909A (en) * | 1986-12-17 | 1988-12-13 | Beloit Corporation | Two-wire paper forming apparatus |
US4960492A (en) * | 1988-02-09 | 1990-10-02 | J.M. Voith Gmbh | Common wire path of a wet end section of a twin wire paper making machine |
US4961824A (en) * | 1984-05-11 | 1990-10-09 | Laitinen Leo S | Method for manufacturing multilayer board |
US5074966A (en) * | 1989-11-06 | 1991-12-24 | Valmet Paper Machinery Inc. | Gap former in a paper machine |
US5102501A (en) * | 1982-08-18 | 1992-04-07 | James River-Norwalk, Inc. | Multiple layer fibrous web products of enhanced bulk and method of manufacturing same |
US5204009A (en) * | 1991-08-14 | 1993-04-20 | Kvaerner Hymac Inc. | Slurry rising apparatus and method therefor |
US5599427A (en) * | 1991-03-15 | 1997-02-04 | Valmet Corporation | Twin-wire web former in a paper machine |
US5609726A (en) * | 1993-06-28 | 1997-03-11 | J.M. Voith Gmbh | Headbox and method for producing multilayer and multi-ply paper webs |
US5868903A (en) * | 1994-10-14 | 1999-02-09 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Device for dewatering and/or washing suspensions, in particular suspensions of fibrous materials |
US5916417A (en) * | 1997-08-22 | 1999-06-29 | International Paper Company | Method of making multi-ply paperboard sheet having layers of different fiber properties |
US6267846B1 (en) | 1998-01-30 | 2001-07-31 | Voith Sulzer Papiertechnik Patent Gmbh | Twin wire former and method of manufacturing a fibrous material web from a fibrous suspension using same |
US20040163788A1 (en) * | 2003-02-20 | 2004-08-26 | Daniel Filion | Headbox sealing device |
CN117759196A (zh) * | 2024-02-22 | 2024-03-26 | 山东省地质矿产勘查开发局第七地质大队(山东省第七地质矿产勘查院) | 一种勘探孔分层抽水试验封隔止水装置 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI379674A (xx) * | 1974-01-17 | 1975-07-18 | Beloit Corp | |
SE421328B (sv) * | 1978-04-25 | 1981-12-14 | Karlstad Mekaniska Ab | Forfarande och anordning for bildande av en flerskiktsmeldstrale |
DE3107926A1 (de) * | 1981-03-02 | 1982-11-04 | Escher Wyss Gmbh, 7980 Ravensburg | Verfahren zum ausbilden einer mehrlagigen papierbahn in einem doppelsiebformer und doppelsiebformer zur durchfuehrung des verfahrens |
DE3815470A1 (de) * | 1988-05-06 | 1989-11-16 | Voith Gmbh J M | Doppelsieb-former |
DE19941676A1 (de) * | 1999-09-01 | 2001-03-08 | Voith Paper Patent Gmbh | Vorrichtung zur Entwässerung eines Stoff-Wasser-Gemisches |
Citations (12)
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US1018588A (en) * | 1910-11-07 | 1912-02-27 | John B Shepler | Multiple-ply-paper-board-making machine. |
US1718574A (en) * | 1925-05-11 | 1929-06-25 | William H Millspaugh | Paper-making method and machine |
US1782214A (en) * | 1928-09-06 | 1930-11-18 | Albert D Stewart | Process and apparatus for producing felted fibrous board |
US1875075A (en) * | 1930-01-25 | 1932-08-30 | Masonite Corp | Liquid separation |
US2098733A (en) * | 1937-09-20 | 1937-11-09 | Hummel Ross Fibre Corp | Plyboard |
CA565496A (en) * | 1958-11-04 | R. Webster David | Adjustable slice for a paper machine | |
US2881668A (en) * | 1956-03-30 | 1959-04-14 | St Annes Board Mill Co Ltd | Paper forming section |
US2911039A (en) * | 1957-01-18 | 1959-11-03 | Beloit Iron Works | Paper machine forming section |
US2928464A (en) * | 1957-01-01 | 1960-03-15 | Albert E Reed And Company Ltd | Adjustable slice for flow box |
DE1904962A1 (de) * | 1969-02-01 | 1970-08-20 | Arledter Dr Ing Hanns F | Doppelsieb-Papiermaschine |
US3607625A (en) * | 1968-01-17 | 1971-09-21 | Beloit Corp | Headbox |
US3619362A (en) * | 1969-02-03 | 1971-11-09 | Beloit Corp | Papermaking headbox stock nozzle with liquid jacket means for elimination of stock exposure to air |
-
1972
- 1972-06-08 US US00260808A patent/US3839143A/en not_active Expired - Lifetime
-
1973
- 1973-05-22 GB GB2433373A patent/GB1418057A/en not_active Expired
- 1973-05-28 AR AR248241A patent/AR196668A1/es active
- 1973-05-29 FI FI1724/73A patent/FI61217C/fi active
- 1973-05-29 ZA ZA733652A patent/ZA733652B/xx unknown
- 1973-05-29 BE BE131637A patent/BE800178A/xx unknown
- 1973-06-01 SE SE7307778A patent/SE397549B/xx unknown
- 1973-06-01 JP JP7360981A patent/JPS5214331B2/ja not_active Expired
- 1973-06-04 ES ES415529A patent/ES415529A1/es not_active Expired
- 1973-06-05 NL NL7307840A patent/NL7307840A/xx unknown
- 1973-06-06 FR FR7321562A patent/FR2187990B1/fr not_active Expired
- 1973-06-06 BR BR4215/73A patent/BR7304215D0/pt unknown
- 1973-06-07 CA CA173,507A patent/CA971407A/en not_active Expired
- 1973-06-08 AU AU56736/73A patent/AU5673673A/en not_active Expired
- 1973-06-09 DE DE2329658A patent/DE2329658C3/de not_active Expired
- 1973-06-12 IT IT25192/73A patent/IT990621B/it active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
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CA565496A (en) * | 1958-11-04 | R. Webster David | Adjustable slice for a paper machine | |
US1018588A (en) * | 1910-11-07 | 1912-02-27 | John B Shepler | Multiple-ply-paper-board-making machine. |
US1718574A (en) * | 1925-05-11 | 1929-06-25 | William H Millspaugh | Paper-making method and machine |
US1782214A (en) * | 1928-09-06 | 1930-11-18 | Albert D Stewart | Process and apparatus for producing felted fibrous board |
US1875075A (en) * | 1930-01-25 | 1932-08-30 | Masonite Corp | Liquid separation |
US2098733A (en) * | 1937-09-20 | 1937-11-09 | Hummel Ross Fibre Corp | Plyboard |
US2881668A (en) * | 1956-03-30 | 1959-04-14 | St Annes Board Mill Co Ltd | Paper forming section |
US2928464A (en) * | 1957-01-01 | 1960-03-15 | Albert E Reed And Company Ltd | Adjustable slice for flow box |
US2911039A (en) * | 1957-01-18 | 1959-11-03 | Beloit Iron Works | Paper machine forming section |
US3607625A (en) * | 1968-01-17 | 1971-09-21 | Beloit Corp | Headbox |
DE1904962A1 (de) * | 1969-02-01 | 1970-08-20 | Arledter Dr Ing Hanns F | Doppelsieb-Papiermaschine |
US3619362A (en) * | 1969-02-03 | 1971-11-09 | Beloit Corp | Papermaking headbox stock nozzle with liquid jacket means for elimination of stock exposure to air |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3970514A (en) * | 1974-02-15 | 1976-07-20 | Oy Tampella Ab | Combination-paper machine |
US3944464A (en) * | 1974-05-10 | 1976-03-16 | International Paper Company | Forming section for twin-wire papermaking machine |
US4414061A (en) * | 1975-02-20 | 1983-11-08 | Australian Paper Manufacturers Limited | Twin wire paper forming apparatus |
US4021295A (en) * | 1975-05-05 | 1977-05-03 | Beloit Corporation | Method and apparatus for supplying white water from a single silo in the formation of a multi-ply web |
US4036684A (en) * | 1975-08-04 | 1977-07-19 | Beloit Corporation | High bulk tissue forming and drying apparatus |
US4113557A (en) * | 1976-04-14 | 1978-09-12 | Valmet Oy | Paper manufacturing structure particularly for detaching a web from a wire |
DE2732361A1 (de) * | 1976-07-16 | 1978-01-26 | Beloit Corp | Steuervorrichtung fuer einen stoffauflaufkasten mit mehreren kanaelen fuer eine papiermaschine zur herstellung von mehrlagigen papierbahnen |
US4125428A (en) * | 1977-06-27 | 1978-11-14 | The Black Clawson Company | Vertical twin wire paper machine |
DE2824608A1 (de) * | 1977-07-13 | 1979-01-25 | Tampella Oy Ab | Speiseapparat in einer bahnbildungsmaschine zur herstellung einer zwei- oder mehrschichtigen faserbahn |
US4376012A (en) * | 1979-04-12 | 1983-03-08 | Beloit Corporation | Method of forming a multi-ply web from paper stock |
US4376014A (en) * | 1979-04-12 | 1983-03-08 | Beloit Corporation | Headbox for forming multi-ply sheets |
WO1981002903A1 (en) * | 1980-04-11 | 1981-10-15 | Valmet Oy | Headbox for a paper machine |
DE3221212A1 (de) * | 1981-06-04 | 1982-12-23 | Aktiebolaget Bofors, 69180 Bofors | Filter und verfahren zu seiner herstellung |
US4431542A (en) * | 1981-06-04 | 1984-02-14 | Aktiebolaget Bofors | Filter and method of producing the same |
US4526653A (en) * | 1981-12-01 | 1985-07-02 | Kmw Aktiebolag | Control system for a multilayer headbox using an ultrasonic transducer |
US4539073A (en) * | 1981-12-01 | 1985-09-03 | Kmw Aktiebolag | Method and apparatus for measuring the size of a discharge slot in a headbox |
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CN117759196A (zh) * | 2024-02-22 | 2024-03-26 | 山东省地质矿产勘查开发局第七地质大队(山东省第七地质矿产勘查院) | 一种勘探孔分层抽水试验封隔止水装置 |
CN117759196B (zh) * | 2024-02-22 | 2024-05-03 | 山东省地质矿产勘查开发局第七地质大队(山东省第七地质矿产勘查院) | 一种勘探孔分层抽水试验封隔止水装置 |
Also Published As
Publication number | Publication date |
---|---|
FR2187990A1 (xx) | 1974-01-18 |
NL7307840A (xx) | 1973-12-11 |
DE2329658A1 (de) | 1974-01-03 |
AR196668A1 (es) | 1974-02-12 |
FR2187990B1 (xx) | 1979-07-27 |
FI61217B (fi) | 1982-02-26 |
FI61217C (fi) | 1982-06-10 |
CA971407A (en) | 1975-07-22 |
JPS4948914A (xx) | 1974-05-11 |
GB1418057A (en) | 1975-12-17 |
IT990621B (it) | 1975-07-10 |
AU5673673A (en) | 1974-12-12 |
BR7304215D0 (pt) | 1974-07-18 |
DE2329658C3 (de) | 1980-05-08 |
JPS5214331B2 (xx) | 1977-04-21 |
ES415529A1 (es) | 1976-02-16 |
DE2329658B2 (de) | 1979-08-30 |
SE397549B (sv) | 1977-11-07 |
ZA733652B (en) | 1974-04-24 |
BE800178A (fr) | 1973-09-17 |
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