WO1987000091A1 - Short dwell application with big excess paste amount - Google Patents
Short dwell application with big excess paste amount Download PDFInfo
- Publication number
- WO1987000091A1 WO1987000091A1 PCT/FI1986/000076 FI8600076W WO8700091A1 WO 1987000091 A1 WO1987000091 A1 WO 1987000091A1 FI 8600076 W FI8600076 W FI 8600076W WO 8700091 A1 WO8700091 A1 WO 8700091A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paste
- web
- arrangement
- amount
- supplied
- 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.)
- Ceased
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
- D21H23/40—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper only one side of the paper being in contact with the material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
- D21H5/0012—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours
- D21H5/0015—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours only one side of the paper being in contact with the treating medium, e.g. paper carried by support
Definitions
- the invention relates to an arrangement for the coating of a running material web quoted in the preamble of claim 1.
- Paper, cardboard etc. are normally produced from natural cellulose fiber.
- the paper production is a complicated process, which is started by the defibration of natural logs or other plant parts, fibre preparation and finally sheet formation.
- the sheet formation one strives to distribute the fibers so evenly as possible.
- the fibers are guided more near to each other and are linked, mainly through fluidum bonds.
- the paper comprises fibres located in several layers, arbitrarily distributed. If one examines the paper through a magnifying glass, cavities are found between the fibers and the surface is found uneven - everything depending on the micro structure quoted above.
- a common method for the surface levelling and the porocity reducing is the application of a layer on the top of the completed paper surface.
- a normal method is to mix finely divided pigment, for instance clay, with water along with some binding substance, for instance latex, and thereafter to supply this paste on the paper web.
- the surface smoothness is realized in that one doctors the paste by a trowel blade, a so called scraper knife. The doctored paper is hereafter dried, whereby the supplied paste is attached at the paper web through a certain penetration.
- a normal coating method is the guiding of the paper web through a nip located between two drums, in which the paste is supplied by the partial immersion of the other drum in a machine bin filled with paste.
- the paste excess is doctored off hereafter at a certain distance from the nip and the paste is levelled by a scraper knife.
- the drum nip can also be replaced by a fountain or a so-called applicator.
- Normal web speeds are 600-1000 m/min. but even higher speeds, up towards 2000 m/min are applied.
- the paste excess during the doctoring is hereby often 10-20 ggr. This excess amount is resupplied in to a trough for the return to the machine bin.
- a nip method has been developed during the past years, which combines the fountain application and the doctoring in to one member the so-called short " dwell technique.
- a benefit hereby is the short distance between the paste application and the doctoring.
- the so far constructed short dwell appliances comprise a defect, which is the minor paste excess amount realized. This is a result of the applied -technique, in which the eventual paste excess amount must be compressed out at the rear wall against the running direction of the paper web. This results even in a prolonged penetration extent than was intended for.
- the object of the invention is to realize a development of the familiar short dwell appliances so, that the amount of the paste excess, which is supplied on the web, can be increased.
- An object is also to realize an application with a favourably short penetration extent.
- a further object is to create an arrang ⁇ ement in which the application paste flow is smoothly arranged in the application arrangement and air bubbles in the paste can be separated before the paste reaches the running web.
- a big amount, in comparison to that paste amount attached at the web, of application paste is supplied on the web in the application chamber.
- the application chamber is divided by a distributor in an inlet and an exit channel.
- the paste is supplied on the web thereat, where the latter arrives in the application chamber, after which the paste follows along 'with the web to a doctor, which orms the front wail of the chamber, at which the excess paste is removed and guided in to the exit channel of the application chamber, for a resupply in the process.
- the appli ⁇ cation of the paste with a normal paste excess amount can be done in an arrangement according to the invention. By this means a so-called skip-coating, among other things, is avoided, that is, uncoated surfaces on the paper web.
- the doctor at the front edge of the application chamber is, according to a preferred embodiment, a so-called downstreams inclined scraper knife, which forms a sharp angle relative to the running web, in the web running direction.
- An alternative embodiment comprises an upstreams inclined scraper knife of that type which is described in the Swedish Patent Application Nr. 85033 ⁇ 5- .
- a benefit within this embodiment lies in that one avoids those rheoiogy phenomena, which are generated with a "downstreams" scraper knife. Furthermore, a free exit is realized for the recycle paste.
- That gap which unavoidably must be found at the rear edge of the application chamber can be made quite small, that is, a gap so big only is left which is necessary for a free passage of the paper. Furthermore, this gap can be provided with, for instance, a small roil, in order to prevent a reverse paste flow. Other appliances can even be imagined for the prevention of the paste reverse flow. By such means an increased pressure can be available in the space, in which the application of the paste is carried out.
- Figure 1 illustrates an embodiment of the invention in a side view
- Figure 2 illustrates another embodiment of the invention in a side view
- Figure 3 illustrates a third embodiment of the invention in a side view
- Figure illustrates a fourth embodiment of the invention in a side view.
- the reference A in the drawing refers to a guide or support drum rotating in the rotation direction 22, which carries a running material web 2.
- Reference 1 refers to a ⁇ owing paste amount wnicn enters tne application arrangement through an inlet channel thereof.
- Reference 9 refers to a rear edge seal of the application chamber, which in the embodiment according to Figure 1 comprises a knife.
- Reference 6 refers to a distributor in the application chamber which divides the interior extent of the chamber in an inlet channel and an exit channel 7. Between the front edge of the distributor 6 and the running web is located a gap 13, through which the application paste flows.
- Reference 3 refers to a doctor, for instance a scraper knife, which by means of an appliance 17 is compressed - against material web 2.
- Application paste 1 is supplied on web 2, in the described arrangement, in the application chamber at that location, at which web 2 enters the application chamber at rear edge seal 9.
- a big amount of paste 16 is supplied hereat on web 2, and follows along with it ail the way to doctor 3, whereat the excess amount is removed and the sur ace is levelled for the realization of the desired coating layer 5 on the web.
- the removed excess amount streams hereafter through channel 7 in to a collector container 8 for a resuppiy in the • process.
- distributor 6 is replaced by a distributor 15, which is movable in a direction 21 for the adjustment of gap 13 through an appliance 14.
- the minor amount of excess paste amount 10 in the reverse flow direction, which penetrates through rear edge seal 9, is collected in a container 11.
- the entire arrangment 18 is turnabie in a direction-of arrow 20, and hoistable and descendable in a direction of arrow 19, also.
- rear edge seal 9 is repiaced ' Tay a roil 12 arranged rotatably, for a further reduction of the paste amount 10 in the reverse flow direction.
- openings 23 are arranged in the inlet channel of the flowing paste for the separation of air bubbles from the paste. That amount of paste 2k, which hereby follows along with the air bubbles, is collected in the container 11.
Landscapes
- Paper (AREA)
Abstract
Arrangement for the coating of a running web (2), for instance a paper, a cardboard or a like web, by means of a so-called short dwell applicator (18), in which the paste supply, the paste doctoring and levelling of the supplied coating layer are carried out in the same arrangement and the amount of the excess supplied paste is collected for a recirculation. The arrangement comprises a rear edge seal (9, 12) and fore distributor (6, 15) so arranged that the coating paste is supplied on the web there, where the last quoted arrives in the arrangement, and that hereafter the paste flows mainly in the direction (22) ofthe material web (2) until it meets a doctor (3). The amount of supplied paste (1) is hereby big compared to the amount (5) of paste, which attached and levelled follows along with the running material web (2).
Description
SHORT DWELL APPLICATION WITH BIG EXCESS PASTE AMOUNT
The invention relates to an arrangement for the coating of a running material web quoted in the preamble of claim 1.
Paper, cardboard etc. are normally produced from natural cellulose fiber. The paper production is a complicated process, which is started by the defibration of natural logs or other plant parts, fibre preparation and finally sheet formation. In the sheet formation one strives to distribute the fibers so evenly as possible. Along with the dewatering, which is carried out by the sheet formation, the fibers are guided more near to each other and are linked, mainly through fluidum bonds.
The paper comprises fibres located in several layers, arbitrarily distributed. If one examines the paper through a magnifying glass, cavities are found between the fibers and the surface is found uneven - everything depending on the micro structure quoted above.
One might have different reasons for the desire to improve this uneven micro structure. One might have, for instance, the desire to reduce the porocity in the paper, in order to be able to apply it as packaging material. Or, it is also important to improve the paper surface itself, in order to be able to print on the paper with a good result. A common method for the surface levelling and the porocity reducing is the application of a layer on the top of the completed paper surface. A normal method is to mix finely divided pigment, for instance clay, with water along with some binding substance, for instance latex, and thereafter to supply this paste on the paper web. The surface smoothness is realized in that
one doctors the paste by a trowel blade, a so called scraper knife. The doctored paper is hereafter dried, whereby the supplied paste is attached at the paper web through a certain penetration.
A normal coating method is the guiding of the paper web through a nip located between two drums, in which the paste is supplied by the partial immersion of the other drum in a machine bin filled with paste. The paste excess is doctored off hereafter at a certain distance from the nip and the paste is levelled by a scraper knife. The drum nip can also be replaced by a fountain or a so-called applicator.
Normal web speeds are 600-1000 m/min. but even higher speeds, up towards 2000 m/min are applied. The paste excess during the doctoring is hereby often 10-20 ggr. This excess amount is resupplied in to a trough for the return to the machine bin.
A nip method has been developed during the past years, which combines the fountain application and the doctoring in to one member the so-called short "dwell technique. A benefit hereby is the short distance between the paste application and the doctoring.
The so far constructed short dwell appliances comprise a defect, which is the minor paste excess amount realized. This is a result of the applied -technique, in which the eventual paste excess amount must be compressed out at the rear wall against the running direction of the paper web. This results even in a prolonged penetration extent than was intended for.
The object of the invention is to realize a development of the familiar short dwell appliances so, that the amount of the paste excess, which is supplied on the web, can be increased. An object is also to realize an application with a favourably short penetration extent. A further object is to create an arrang¬ ement in which the application paste flow is smoothly arranged in the application arrangement and air bubbles in the paste can be separated before the paste reaches the running web.
The characteristics of the invention are disclosed in claim 1. A big amount, in comparison to that paste amount attached at the web, of application paste is
supplied on the web in the application chamber. The application chamber is divided by a distributor in an inlet and an exit channel. The paste is supplied on the web thereat, where the latter arrives in the application chamber, after which the paste follows along 'with the web to a doctor, which orms the front wail of the chamber, at which the excess paste is removed and guided in to the exit channel of the application chamber, for a resupply in the process. The appli¬ cation of the paste with a normal paste excess amount can be done in an arrangement according to the invention. By this means a so-called skip-coating, among other things, is avoided, that is, uncoated surfaces on the paper web.
The doctor at the front edge of the application chamber is, according to a preferred embodiment, a so-called downstreams inclined scraper knife, which forms a sharp angle relative to the running web, in the web running direction. An alternative embodiment comprises an upstreams inclined scraper knife of that type which is described in the Swedish Patent Application Nr. 85033Ψ5- . A benefit within this embodiment lies in that one avoids those rheoiogy phenomena, which are generated with a "downstreams" scraper knife. Furthermore, a free exit is realized for the recycle paste.
That gap which unavoidably must be found at the rear edge of the application chamber, can be made quite small, that is, a gap so big only is left which is necessary for a free passage of the paper. Furthermore, this gap can be provided with, for instance, a small roil, in order to prevent a reverse paste flow. Other appliances can even be imagined for the prevention of the paste reverse flow. By such means an increased pressure can be available in the space, in which the application of the paste is carried out.
The invention is described more in detain with reference to the attached drawing in which
Figure 1 illustrates an embodiment of the invention in a side view, Figure 2 illustrates another embodiment of the invention in a side view, Figure 3 illustrates a third embodiment of the invention in a side view; and Figure illustrates a fourth embodiment of the invention in a side view.
The reference A in the drawing refers to a guide or support drum rotating in the rotation direction 22, which carries a running material web 2. Reference 1 refers
to a πowing paste amount wnicn enters tne application arrangement through an inlet channel thereof. Reference 9 refers to a rear edge seal of the application chamber, which in the embodiment according to Figure 1 comprises a knife. Reference 6 refers to a distributor in the application chamber which divides the interior extent of the chamber in an inlet channel and an exit channel 7. Between the front edge of the distributor 6 and the running web is located a gap 13, through which the application paste flows. Reference 3 refers to a doctor, for instance a scraper knife, which by means of an appliance 17 is compressed - against material web 2. Application paste 1 is supplied on web 2, in the described arrangement, in the application chamber at that location, at which web 2 enters the application chamber at rear edge seal 9. A big amount of paste 16 is supplied hereat on web 2, and follows along with it ail the way to doctor 3, whereat the excess amount is removed and the sur ace is levelled for the realization of the desired coating layer 5 on the web. The removed excess amount streams hereafter through channel 7 in to a collector container 8 for a resuppiy in the • process. Thus, by means of the described arrangement one realizes a smooth and continuous flow of the coating paste in the arrangement, through that also the penetration extent is kept favourably short in the arrangement.
In the embodiment according to Figure 2, distributor 6 is replaced by a distributor 15, which is movable in a direction 21 for the adjustment of gap 13 through an appliance 14. The minor amount of excess paste amount 10 in the reverse flow direction, which penetrates through rear edge seal 9, is collected in a container 11. The entire arrangment 18 is turnabie in a direction-of arrow 20, and hoistable and descendable in a direction of arrow 19, also.
In the embodiment according to Figure 3, rear edge seal 9 is repiaced'Tay a roil 12 arranged rotatably, for a further reduction of the paste amount 10 in the reverse flow direction.
In the embodiment according to Figure , openings 23 are arranged in the inlet channel of the flowing paste for the separation of air bubbles from the paste. That amount of paste 2k, which hereby follows along with the air bubbles, is collected in the container 11.
The invention is not limited to the embodiments shown, but several modification are feasible within the scope of the attached claims.
Claims
1. An arrangement for the coating of a running web (2), for instance a paper, a cardboard or a like web, by means of a so-called short dwell applicator (18), in which the paste" supply, the paste doctoring and levelling of the supplied coating layer being carried out in the same arrangement and the amount of the excess supplied paste being collected for a recirculation, characterized in that the arrangement comprises a rear edge seal (9,12) and- fore distributor (6,15) so arranged that the coating paste is supplied on the web there, where the last quoted arrives in the arrangement, and that hereafter the paste flows mainly in the direction of the material web (2) until it meets a doctor (3), and that the amount of the supplied paste (1) is big compared to the amount of paste, which attached and levelled follows along with the running material web (2).
2. Arrangement according to claim 1, characterized in that the fore, distributor (15) comprises an arrangement, by means of which a gap (13) between the fore distributor and the running material web can be adjusted.
3. Arrangement according to claim 1 or 2, characterized in that the rear edge1 seal (9,12) in a biggest possible extension is arranged to prevent the paste to flow out of the arrangement in a direction against the web running direction, however so, that said seal is adjustable in order to allow the web to run freely in to the applicator, and that the minor amount of the paste ( 10), which hereby flows beyond the seal (9,12), is collected in a container (11) for a recirculation. .
Ψ. Arrangement according to any of the preceding claims, characterized in that
the rear edge seal is constructed to a roll (12), which either moves freely or alternatively is rotated by a speed of rotation which adapted to or deviates rom the speed and the running direction of the material web.
5. Arrangement according to any of the preceeding claims, characterized in that the amount of the excess paste (4) is doctored by a doctor (3) located at the fore edge of the arrangement, for instance by a scraper blade inclined downstreams or upstreams, after which the excess paste is allowed to flow via a channel (7) in to a collector container (8).
6. Arrangement according to any of the preceding claims, characterized in that the fore distributor (6,15) comprises a replaceable scraper blade (15) or the like.
7. Arrangement according to any of the preceeding claims, characterized in that eventually generated air bubbles' in the paste are allowed to flow" out through openings (23) in the applicator, before the paste is supplied on the material web (2), and that the paste amount (2Ψ) hereby eventually following along with the air bubbles is collected in a container (11) for the recirculation.
8. Arrangement according to any of the preceeding claims, characterized in that the entire applicator (18) carrying out the paste supply and the paste doctoring is hoistable, descendable ( 19 ) or turnable (20 ) .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI1986/000076 WO1987000091A1 (en) | 1985-07-05 | 1986-07-07 | Short dwell application with big excess paste amount |
| FI870948A FI870948A0 (en) | 1985-07-05 | 1986-07-07 | SHORT-DWELL-APPLICERING MED STORT SMETOEVERSKOTT. |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8503652A SE8503652D0 (en) | 1985-07-05 | 1985-07-05 | SHORT-DWELL APPLICATION WITH LARGE SMOOTH SURFACE |
| SE8503652-3 | 1985-07-05 | ||
| PCT/FI1986/000076 WO1987000091A1 (en) | 1985-07-05 | 1986-07-07 | Short dwell application with big excess paste amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1987000091A1 true WO1987000091A1 (en) | 1987-01-15 |
Family
ID=26160852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FI1986/000076 Ceased WO1987000091A1 (en) | 1985-07-05 | 1986-07-07 | Short dwell application with big excess paste amount |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1987000091A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3734900A1 (en) * | 1987-05-07 | 1988-12-01 | Voith Gmbh J M | DEVICE FOR COATING A RUNNING PAPER OR CARDBOARD |
| WO1988009700A1 (en) * | 1987-06-12 | 1988-12-15 | A. Ahlstrom Corporation | Method and apparatus for coating a paper web |
| FR2627785A1 (en) * | 1988-01-29 | 1989-09-01 | Valmet Paper Machinery Inc | DEVICE FOR COATING A STRIP WITH A COATING COMPOSITION |
| EP0319503A3 (en) * | 1987-12-03 | 1989-10-11 | Valmet Paper Machinery Inc. | Method and device for application and dosage of coating material onto a moving base |
| GB2227959A (en) * | 1989-01-17 | 1990-08-15 | Valmet Paper Machinery Inc | Blade coating a material web |
| WO1990011136A1 (en) * | 1989-03-28 | 1990-10-04 | Beloit Corporation | A coater apparatus |
| EP0514735A1 (en) * | 1991-05-23 | 1992-11-25 | J.M. Voith GmbH | Nozzle-type coating device for applying coating material to a paper web |
| EP0761878A3 (en) * | 1995-09-01 | 1997-06-25 | Voith Sulzer Papiermasch Gmbh | Device for applying fluid or pasty material onto a moving web, in particular paper or board |
| US5653401A (en) * | 1993-05-14 | 1997-08-05 | Fabio Perini S.P.A. | Apparatus and method for applying a glue on a core for the winding of web material |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2545902A1 (en) * | 1974-10-16 | 1976-04-29 | Inventing Ab | METHOD AND DEVICE FOR APPLYING A COATING MATERIAL TO A PAPER WEB |
| SE419946B (en) * | 1974-10-16 | 1981-09-07 | Inventing Ab | SET AND DEVICE FOR COATING A CURRENT COAT |
| US4357370A (en) * | 1981-03-27 | 1982-11-02 | Beloit Corporation | Twin short dwell coater arrangement |
| US4452833A (en) * | 1982-02-08 | 1984-06-05 | Consolidated Papers, Inc. | Paper coating method |
| DE3338095A1 (en) * | 1983-10-20 | 1985-05-09 | J.M. Voith Gmbh, 7920 Heidenheim | PAINTING DEVICE |
| DE3446525A1 (en) * | 1984-01-07 | 1985-08-01 | Jagenberg AG, 4000 Düsseldorf | Apparatus for coating, with a controllable coating thickness, lengths of material running over a support roller |
| DE3420412A1 (en) * | 1984-06-01 | 1985-12-05 | J.M. Voith Gmbh, 7920 Heidenheim | Coating device for coating moving webs of material |
-
1986
- 1986-07-07 WO PCT/FI1986/000076 patent/WO1987000091A1/en not_active Ceased
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2545902A1 (en) * | 1974-10-16 | 1976-04-29 | Inventing Ab | METHOD AND DEVICE FOR APPLYING A COATING MATERIAL TO A PAPER WEB |
| SE419946B (en) * | 1974-10-16 | 1981-09-07 | Inventing Ab | SET AND DEVICE FOR COATING A CURRENT COAT |
| US4357370A (en) * | 1981-03-27 | 1982-11-02 | Beloit Corporation | Twin short dwell coater arrangement |
| US4452833A (en) * | 1982-02-08 | 1984-06-05 | Consolidated Papers, Inc. | Paper coating method |
| SE444895B (en) * | 1982-02-08 | 1986-05-20 | Cons Paper Inc | COATING DEVICE FOR COATING CURRENT MATERIAL COURSES CONSISTING OF A COATING CHAMBER WITH AN INTERNAL POINT |
| DE3338095A1 (en) * | 1983-10-20 | 1985-05-09 | J.M. Voith Gmbh, 7920 Heidenheim | PAINTING DEVICE |
| DE3446525A1 (en) * | 1984-01-07 | 1985-08-01 | Jagenberg AG, 4000 Düsseldorf | Apparatus for coating, with a controllable coating thickness, lengths of material running over a support roller |
| DE3420412A1 (en) * | 1984-06-01 | 1985-12-05 | J.M. Voith Gmbh, 7920 Heidenheim | Coating device for coating moving webs of material |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3734900A1 (en) * | 1987-05-07 | 1988-12-01 | Voith Gmbh J M | DEVICE FOR COATING A RUNNING PAPER OR CARDBOARD |
| US5018478A (en) * | 1987-06-12 | 1991-05-28 | A. Ahlstrom Corporation | Method and apparatus for coating a paper web |
| WO1988009700A1 (en) * | 1987-06-12 | 1988-12-15 | A. Ahlstrom Corporation | Method and apparatus for coating a paper web |
| EP0319503A3 (en) * | 1987-12-03 | 1989-10-11 | Valmet Paper Machinery Inc. | Method and device for application and dosage of coating material onto a moving base |
| FR2627785A1 (en) * | 1988-01-29 | 1989-09-01 | Valmet Paper Machinery Inc | DEVICE FOR COATING A STRIP WITH A COATING COMPOSITION |
| GB2227959A (en) * | 1989-01-17 | 1990-08-15 | Valmet Paper Machinery Inc | Blade coating a material web |
| GB2227959B (en) * | 1989-01-17 | 1992-10-14 | Valmet Paper Machinery Inc | Inverted blade metering unit and method for blade-coating a material web |
| US4961968A (en) * | 1989-03-28 | 1990-10-09 | Beloit Corporation | Short dwell coater apparatus with backing blanket disposed between blade and guide roll |
| WO1990011136A1 (en) * | 1989-03-28 | 1990-10-04 | Beloit Corporation | A coater apparatus |
| EP0514735A1 (en) * | 1991-05-23 | 1992-11-25 | J.M. Voith GmbH | Nozzle-type coating device for applying coating material to a paper web |
| US5653401A (en) * | 1993-05-14 | 1997-08-05 | Fabio Perini S.P.A. | Apparatus and method for applying a glue on a core for the winding of web material |
| EP0761878A3 (en) * | 1995-09-01 | 1997-06-25 | Voith Sulzer Papiermasch Gmbh | Device for applying fluid or pasty material onto a moving web, in particular paper or board |
| US5788771A (en) * | 1995-09-01 | 1998-08-04 | Voith Sulzer Papiermaschinen Gmbh | Apparatus for applying a fluid or pastry medium to a continuous material web, particularly one made of paper or cardboard |
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