CA2093093A1 - Method for coating a material web - Google Patents
Method for coating a material webInfo
- Publication number
- CA2093093A1 CA2093093A1 CA 2093093 CA2093093A CA2093093A1 CA 2093093 A1 CA2093093 A1 CA 2093093A1 CA 2093093 CA2093093 CA 2093093 CA 2093093 A CA2093093 A CA 2093093A CA 2093093 A1 CA2093093 A1 CA 2093093A1
- Authority
- CA
- Canada
- Prior art keywords
- web
- coating mix
- blade
- amount
- applied onto
- 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.)
- Abandoned
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
- D21H23/34—Knife or blade type coaters
- D21H23/36—Knife or blade forming part of the fluid reservoir, e.g. puddle-type trailing blade or short-dwell coaters
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
- D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades
Abstract
(57) Abstract:
The invention concerns a control method for such an applicator and metering unit in which the coating mix is applied onto the web via a gap formed between the web and a blade tilted to an acute angle to the web, and the applied coating mix is smoothed and the excess mix is removed at the doctor blade. The invention is based on controlling the final coat weight by way of altering the amount of coating mix adhering to the web at the applicator unit. According to the method the linear loading pressure of the applicator unit blade (12) is at the start-up set to an approxi-mately correct value for desired coat weight and held at a constant level during running, and the amount of coating mix applied onto the web is controlled during running by altering the amount of coating mix adhering to the web at the applicator unit (2). This arrangement achieves an accurate control of coat weight and the cross-directional profile of coat weight be readily controlled.
(Figure 1)
The invention concerns a control method for such an applicator and metering unit in which the coating mix is applied onto the web via a gap formed between the web and a blade tilted to an acute angle to the web, and the applied coating mix is smoothed and the excess mix is removed at the doctor blade. The invention is based on controlling the final coat weight by way of altering the amount of coating mix adhering to the web at the applicator unit. According to the method the linear loading pressure of the applicator unit blade (12) is at the start-up set to an approxi-mately correct value for desired coat weight and held at a constant level during running, and the amount of coating mix applied onto the web is controlled during running by altering the amount of coating mix adhering to the web at the applicator unit (2). This arrangement achieves an accurate control of coat weight and the cross-directional profile of coat weight be readily controlled.
(Figure 1)
Description
2~9~0.~3 Method for coating a material wcb The present invention concerns a method according to the preamble of claim l forcoating a web with a coating mix and for controlling the coat weight.
This invention is related to the control of such an applicator and metering apparatus in which the coating mix is applied onto the web via a narrow gap formed between the web and a blade tilted to an obtuse angle with respect to theweb and then the applied mix is levelled and the excess mix doctored away by 1~ means of a doctor blade.
The GB patent application 8,508,431 discloses such a method and apparatus for coating a web. The method according to the publication uses a flexible blade forthe preapplication of the mix, while the final doctoring is performed by means of a scraping doctor blade. The coater apparatus is placed adjacent to the backing roll allowing the coating mix to meet the web over a great length of the web.
Removal of entrained air from the coating mix is difficult in the disclosed embodiment, and the integrated construction of the doctor blade with the coater structure complicates service operations. Furthermore, coating mix behaviour in 2 o the disclosed method is sensitive to disturbances in the application zone such as uneven distribution of the mix feed. Typical consequences therefrom include striping of web coat in the machine direction of the web.
In a coater developed further from the abovedescribed construction, the coating mix is fed onto the web in a laminar flow via a narrow gap formed between the web and a blade tilted to an acute angle with respect to the web. The mix is then levelled and the coat weight is controlled in a conventional manner by means of a doctor blade. Such an apparatus is described in the FI patent application 890249, filed earlier by the applicant. The laminar flow application of the coating mix 3 o onto the web achieves a significant reduction of striping of the cDated web and defects caused by entrained air bubbles on the coated web. Control of coat weight in the apparatus particularly with higher coat weights is, however, rather ~93~39~
complicated due to the fact that a relatively small change in blade loading causes a large change in coat weight. The construction design of the blade must be carried out very carefully to avoid hysteresis in blade adjustments.
It is an object of the present invention to achieve a novel method for coating apaper web in an apparatus described in the patent application FI 890249.
The invention is based on controlling the coat weight by varying the feed of coating mix applied in the coating apparatus onto the web.
More specifically, the method in accordance with the invention is characterized by what is stated in the characterizing part of claim l.
The invention offers significant benefits.
Accurate control of coat weight particularly for higher coat weights becomes easier according to the present invention than is possible in conventional doctor blade coating. The final coat weight is affected by a significantly higher factor by changes in blade loading than by changes in the amount of initially applied coating mix. A change in the amount of initially applied coating mix affects thefinal coat weight basically through altering the momentum inflicted on the doctor blade that tends to bend the blade away from the web surface. Thus, changes in the amount of initially applied coating mix are indirectly reflected in the loading force of the doctor blade required to remove excess coating mix from the web surface. In the present method the operating accuracy requirements on the constant-angle assembly of the doctor blade employed in the coater are relaxed because the loading of the assembly need not be altered during running. Conse-quently, the method is also free from blade tilt angle hysteresis which would diminish the accuracy of blade adjustment. Positional accuracy requirements of 3 0 the support beam for the doctor blade proper are essentially relaxed, since the beam need not be rotated during running. Then, compensation for the beam's machining errors with the help of fine-adjustment means becomes less crucial. As ~3~9~
the doctor blade is not anymore employed for the purpose of controlling the amount of applied coating mix, the blade geometry can be designed for a simplified arrangement of blade profile adjustment without the need for cateringto the hysteresis phenomenon. Simultaneously, a more stable blade profile adj~lstment is attained. The life of the doctor blade is increased by virtue of the constant operating conditions at the blade tip. Limitations set to blade loading by the maximum tilt angle of the support beam are also relaxed.
The invention is next examined in detail with the help of exemplifying embodiments illustrated in the attached drawing.
The coater shown in Fig. 1 comprises a backing roll 15, whose rotational direction is marked by arrow H and whose surface is conformally covered by the paper web 1 to be coated. Extending over the cross-directional width of the web 1, under the backing roll 15, is placed a blade metering unit 2, whose frame is formed by a support beam 11 with an approximately triangular cross section. The support beam 11 is pivotally mounted at a pivot point 10 to the support structures of the coater. The coating mix is fed along a feed channel 3, which is mounted onto the support beam 11 to the entrance side of the web 1 so as to extend cross-directionally over the web 1, into a cavity-like space 16, wherefrom the mix is propelled under pressure into a narrow feed channel 4. As evident from Fig. 1, when sectioned in the plane of the flow vector of the coating mix, the feed channel 4 has a slightly S-shaped section. The f~ed channel 4 exits to the stem part of a predoctoring blade 5. The feed channel 4 is extremely narrow in comparison to conventional feed channels; the exit opening of the feed channel 4in partic.ular has typically a height of only 3...5 mm. The predoctoring blade 5 is fixed at its stem between blade holders 6 and 18. The blade 5 leans flexibly on the web 1 at an acute angle a. The angle a is typically less than 20. The bladeholders 6 and 18 are implemented so as to avoid forming any significant step 3 o between the exit opening of the feed channel 4 and the stem of the blade 5. In particular the blade holder 18 on the side of the feed channel 4 has a wedge-shaped cross section tapering toward the tip of the blade 5. The linear loading of 2 Q ~
the predoctoring blade S can be regulated by a load control device 7. The load control device 7 is divided in the cross direction of the web 1 into independentcontrol sections, whereby the loading of the blade S can be varied in the cross direction of the web I thus allowing for a control means of the applied coating mix quantity in order to obtain a desired coat weight profile in the cross direction of the web. Due to the high feed velocity exceeding l m/s, the excess mix will also spre~d toward the entry direction of the web 1. This excess mix is collected to a first mix collecting trough 9. Furthermore, the excess coating mix flowing over the doctor blade proper is collected to a second mix collecting trough 8.
The final doctoring of the mix on the web is performed using a doctoring unit 14, which comprises a doctor blade 12 proper attached to a second frame beam 17.
The loading of the doctor blade 12 can be regulated by a load control device 13.As is evident frorn Fig. 1, distance 1~ from the tip of the predoctoring blade 5 of the application unit 2 to the tip of the doctor blade 12 proper is rather large in the implementation according to the invention, typically being in the order 0.5..Ø8 m. At typical web speeds used in practice, this distance corresponds to a duration of travel of approx. 30...40 ~s.
In ;he method according to the invention, the coater described above is operatedas follows.
At start-up, the linear load at the doctoring unit 14 is set approximately to a value known to give a desired coat weight. The doctoring unit employed is advanta-geously a doctoring unit of so-called constant-angle type. The linear load at the doctoring unit is basically held at the initial set value through the entire run. The end coat weight is adjusted by altering the applied quantity of the coating mix.Three basic methods are available -for controlling the amount of coating mix applied onto the web in the applicator unit 2, namely, alteration of the feed rate of coating mix pumped via the channel 3, the doctor blade linear loading pressure or the width of the gap between the web or the width of the return flow slit between the web and the applicator unit. The best control result is obtained by 2~93~,(3SJ
altering both the linear loading pressure of the blade or the width of the return flow slit. The applicator blade S is attached to the support beam 11, which forms the frarne of the apparatus, via a control device 7 of the blade linear load. In its operating position the applicator blade 5 tilted to an acute angle in relation to the web 1 floats on a hydrodynamic bed formed by the ~lowing coating mix. A
portion of the coating mix material fed in a laminar flow onto the web 1 passes via the gap between the blade S and the web l, thus adhering to the web. The excess mix is deflected backward against the machine direction H of the web l.
The control of the total amount of coating mix adhering to the web is advanta-geously managed by altering the width of the return flow slit. According to thisscheme, increasing the slit width reduces the back pressure of the return flow, thereby reducing the proportion of coating mix adhering to the web. Reduction ofthe slit width correspondingly increases the back pressure and elevates the internal pressure in the coating mix bed formed between the applicator blade 5 and the web l. Due to the increased pressure, the blade S is forced slightly upward fromthe web and more mix can thus flow out along with the moving web 5.
The same control result is achieved by altering the linear loading pressure of the 2 o applicator blade 5. Moreover, in addition to the machine-direction control of the coat weight profile, the control device 7 of the applicator blade 5 can be employed for the cross-direction control of the coat weight profile. The profilecontrol can be implemented in all types of blade holders equipped with a profile-control facility, and as the control is directly applied to the amount of coating mix adhering to the web surface, a more precise and stable control of the coat profile is attained than by performing the control at the doctor blade 12.
La~ger run-time changes in coat weight are coarsely made by altering the linear loading pressure at the coater unit 14. Thus, the nominal end weight of the coatapplied onto a web is adjusted according to the invention at the doctoring unit,while the precision fine-control of the final coat weight to desired limits is performed by way of altering the amount of coating mix applied onto the web.
a s ~
The blade tilt angle o~ of the blade S can be set even smaller than 15. Optimalsettings of the blade tilt angle and amount of applied coating mix can in advantageous cases permit omission of the doctor blade 12 proper.
The use of a conventional short-dwell coater following the metering unit 2 is possible for grades requiring heavier coat weights.
This invention is related to the control of such an applicator and metering apparatus in which the coating mix is applied onto the web via a narrow gap formed between the web and a blade tilted to an obtuse angle with respect to theweb and then the applied mix is levelled and the excess mix doctored away by 1~ means of a doctor blade.
The GB patent application 8,508,431 discloses such a method and apparatus for coating a web. The method according to the publication uses a flexible blade forthe preapplication of the mix, while the final doctoring is performed by means of a scraping doctor blade. The coater apparatus is placed adjacent to the backing roll allowing the coating mix to meet the web over a great length of the web.
Removal of entrained air from the coating mix is difficult in the disclosed embodiment, and the integrated construction of the doctor blade with the coater structure complicates service operations. Furthermore, coating mix behaviour in 2 o the disclosed method is sensitive to disturbances in the application zone such as uneven distribution of the mix feed. Typical consequences therefrom include striping of web coat in the machine direction of the web.
In a coater developed further from the abovedescribed construction, the coating mix is fed onto the web in a laminar flow via a narrow gap formed between the web and a blade tilted to an acute angle with respect to the web. The mix is then levelled and the coat weight is controlled in a conventional manner by means of a doctor blade. Such an apparatus is described in the FI patent application 890249, filed earlier by the applicant. The laminar flow application of the coating mix 3 o onto the web achieves a significant reduction of striping of the cDated web and defects caused by entrained air bubbles on the coated web. Control of coat weight in the apparatus particularly with higher coat weights is, however, rather ~93~39~
complicated due to the fact that a relatively small change in blade loading causes a large change in coat weight. The construction design of the blade must be carried out very carefully to avoid hysteresis in blade adjustments.
It is an object of the present invention to achieve a novel method for coating apaper web in an apparatus described in the patent application FI 890249.
The invention is based on controlling the coat weight by varying the feed of coating mix applied in the coating apparatus onto the web.
More specifically, the method in accordance with the invention is characterized by what is stated in the characterizing part of claim l.
The invention offers significant benefits.
Accurate control of coat weight particularly for higher coat weights becomes easier according to the present invention than is possible in conventional doctor blade coating. The final coat weight is affected by a significantly higher factor by changes in blade loading than by changes in the amount of initially applied coating mix. A change in the amount of initially applied coating mix affects thefinal coat weight basically through altering the momentum inflicted on the doctor blade that tends to bend the blade away from the web surface. Thus, changes in the amount of initially applied coating mix are indirectly reflected in the loading force of the doctor blade required to remove excess coating mix from the web surface. In the present method the operating accuracy requirements on the constant-angle assembly of the doctor blade employed in the coater are relaxed because the loading of the assembly need not be altered during running. Conse-quently, the method is also free from blade tilt angle hysteresis which would diminish the accuracy of blade adjustment. Positional accuracy requirements of 3 0 the support beam for the doctor blade proper are essentially relaxed, since the beam need not be rotated during running. Then, compensation for the beam's machining errors with the help of fine-adjustment means becomes less crucial. As ~3~9~
the doctor blade is not anymore employed for the purpose of controlling the amount of applied coating mix, the blade geometry can be designed for a simplified arrangement of blade profile adjustment without the need for cateringto the hysteresis phenomenon. Simultaneously, a more stable blade profile adj~lstment is attained. The life of the doctor blade is increased by virtue of the constant operating conditions at the blade tip. Limitations set to blade loading by the maximum tilt angle of the support beam are also relaxed.
The invention is next examined in detail with the help of exemplifying embodiments illustrated in the attached drawing.
The coater shown in Fig. 1 comprises a backing roll 15, whose rotational direction is marked by arrow H and whose surface is conformally covered by the paper web 1 to be coated. Extending over the cross-directional width of the web 1, under the backing roll 15, is placed a blade metering unit 2, whose frame is formed by a support beam 11 with an approximately triangular cross section. The support beam 11 is pivotally mounted at a pivot point 10 to the support structures of the coater. The coating mix is fed along a feed channel 3, which is mounted onto the support beam 11 to the entrance side of the web 1 so as to extend cross-directionally over the web 1, into a cavity-like space 16, wherefrom the mix is propelled under pressure into a narrow feed channel 4. As evident from Fig. 1, when sectioned in the plane of the flow vector of the coating mix, the feed channel 4 has a slightly S-shaped section. The f~ed channel 4 exits to the stem part of a predoctoring blade 5. The feed channel 4 is extremely narrow in comparison to conventional feed channels; the exit opening of the feed channel 4in partic.ular has typically a height of only 3...5 mm. The predoctoring blade 5 is fixed at its stem between blade holders 6 and 18. The blade 5 leans flexibly on the web 1 at an acute angle a. The angle a is typically less than 20. The bladeholders 6 and 18 are implemented so as to avoid forming any significant step 3 o between the exit opening of the feed channel 4 and the stem of the blade 5. In particular the blade holder 18 on the side of the feed channel 4 has a wedge-shaped cross section tapering toward the tip of the blade 5. The linear loading of 2 Q ~
the predoctoring blade S can be regulated by a load control device 7. The load control device 7 is divided in the cross direction of the web 1 into independentcontrol sections, whereby the loading of the blade S can be varied in the cross direction of the web I thus allowing for a control means of the applied coating mix quantity in order to obtain a desired coat weight profile in the cross direction of the web. Due to the high feed velocity exceeding l m/s, the excess mix will also spre~d toward the entry direction of the web 1. This excess mix is collected to a first mix collecting trough 9. Furthermore, the excess coating mix flowing over the doctor blade proper is collected to a second mix collecting trough 8.
The final doctoring of the mix on the web is performed using a doctoring unit 14, which comprises a doctor blade 12 proper attached to a second frame beam 17.
The loading of the doctor blade 12 can be regulated by a load control device 13.As is evident frorn Fig. 1, distance 1~ from the tip of the predoctoring blade 5 of the application unit 2 to the tip of the doctor blade 12 proper is rather large in the implementation according to the invention, typically being in the order 0.5..Ø8 m. At typical web speeds used in practice, this distance corresponds to a duration of travel of approx. 30...40 ~s.
In ;he method according to the invention, the coater described above is operatedas follows.
At start-up, the linear load at the doctoring unit 14 is set approximately to a value known to give a desired coat weight. The doctoring unit employed is advanta-geously a doctoring unit of so-called constant-angle type. The linear load at the doctoring unit is basically held at the initial set value through the entire run. The end coat weight is adjusted by altering the applied quantity of the coating mix.Three basic methods are available -for controlling the amount of coating mix applied onto the web in the applicator unit 2, namely, alteration of the feed rate of coating mix pumped via the channel 3, the doctor blade linear loading pressure or the width of the gap between the web or the width of the return flow slit between the web and the applicator unit. The best control result is obtained by 2~93~,(3SJ
altering both the linear loading pressure of the blade or the width of the return flow slit. The applicator blade S is attached to the support beam 11, which forms the frarne of the apparatus, via a control device 7 of the blade linear load. In its operating position the applicator blade 5 tilted to an acute angle in relation to the web 1 floats on a hydrodynamic bed formed by the ~lowing coating mix. A
portion of the coating mix material fed in a laminar flow onto the web 1 passes via the gap between the blade S and the web l, thus adhering to the web. The excess mix is deflected backward against the machine direction H of the web l.
The control of the total amount of coating mix adhering to the web is advanta-geously managed by altering the width of the return flow slit. According to thisscheme, increasing the slit width reduces the back pressure of the return flow, thereby reducing the proportion of coating mix adhering to the web. Reduction ofthe slit width correspondingly increases the back pressure and elevates the internal pressure in the coating mix bed formed between the applicator blade 5 and the web l. Due to the increased pressure, the blade S is forced slightly upward fromthe web and more mix can thus flow out along with the moving web 5.
The same control result is achieved by altering the linear loading pressure of the 2 o applicator blade 5. Moreover, in addition to the machine-direction control of the coat weight profile, the control device 7 of the applicator blade 5 can be employed for the cross-direction control of the coat weight profile. The profilecontrol can be implemented in all types of blade holders equipped with a profile-control facility, and as the control is directly applied to the amount of coating mix adhering to the web surface, a more precise and stable control of the coat profile is attained than by performing the control at the doctor blade 12.
La~ger run-time changes in coat weight are coarsely made by altering the linear loading pressure at the coater unit 14. Thus, the nominal end weight of the coatapplied onto a web is adjusted according to the invention at the doctoring unit,while the precision fine-control of the final coat weight to desired limits is performed by way of altering the amount of coating mix applied onto the web.
a s ~
The blade tilt angle o~ of the blade S can be set even smaller than 15. Optimalsettings of the blade tilt angle and amount of applied coating mix can in advantageous cases permit omission of the doctor blade 12 proper.
The use of a conventional short-dwell coater following the metering unit 2 is possible for grades requiring heavier coat weights.
Claims (6)
1. A method for applying and smoothing a coating mix onto a web (1) moving on a rotating backing roll (15) using an assembly comprising - an applicator unit (2) incorporating a smoothing element (5) adapted to the immediate vicinity of the web (1) for smoothing the applied coating mix, said smoothing element being a flexible blade (5) with a tip tilt angle .alpha. less than 20°, and a narrow-slit feed element (4) which exits without any essential threshold close to the stem of the flexible blade thus facilitating a high-speed laminar flow of the coating mix feed, - a doctoring unit (14), adapted at a distance in the machine direction of the web (1), comprising at least one blade (12) suited to be pressed against the web (1).
said method comprising at least the following operations:
- the coating mix is applied onto the web (1) using the applicator unit (2) and - the coating mix is smoothed onto the web (1) with the help of the doctor blade 12 of the doctoring unit, characterized in that - the linear loading pressure of the blade (12) of the doctoring unit is at the start-up set to an approximately correct value for desired coat weight and held at a constant level during running and - the amount of coating mix applied onto the web is controlled during running by way of altering the amount of coating mix adhering to the web at the applicator unit (2).
said method comprising at least the following operations:
- the coating mix is applied onto the web (1) using the applicator unit (2) and - the coating mix is smoothed onto the web (1) with the help of the doctor blade 12 of the doctoring unit, characterized in that - the linear loading pressure of the blade (12) of the doctoring unit is at the start-up set to an approximately correct value for desired coat weight and held at a constant level during running and - the amount of coating mix applied onto the web is controlled during running by way of altering the amount of coating mix adhering to the web at the applicator unit (2).
2. A method as defined in claim 1, c h a r a c t e r i z e d in that the amount of coating mix applied onto the web at the applicator unit (2) is controlled by altering the linear loading pressure of the applicator unit blade (5).
3. A method as defined in claim 1, c h a r a c t e r i z e d in that the amount of coating mix applied onto the web at the applicator unit is controlled by altering mutual distance of the gap between the applicator unit and the web (1) on the entry side of web into the gap.
4. A method as defined in any foregoing claim, c h a r a c t e r i z e d in thatthe amount of coating mix applied onto the web is altered in the cross direction to the web for controlling the cross-directional profile of the coat weight.
5. A method as defined in claim 4, c h a r a c t e r i z e d in that the amount of coating mix applied onto the web is altered in the cross direction to the web by controlling the profile of the applicator unit blade (5).
6. A method as defined in claim 4, c h a r a c t e r i z e d in that the amount of coating mix applied onto the web is altered in the cross direction to the web by controlling the profile of coating mix fed via the feed elements.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI921588A FI91298C (en) | 1992-04-10 | 1992-04-10 | Method for coating a web of material |
| FI921588 | 1992-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2093093A1 true CA2093093A1 (en) | 1993-10-11 |
Family
ID=8535078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2093093 Abandoned CA2093093A1 (en) | 1992-04-10 | 1993-03-31 | Method for coating a material web |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA2093093A1 (en) |
| DE (1) | DE4303577A1 (en) |
| FI (1) | FI91298C (en) |
| FR (1) | FR2691179B1 (en) |
| GB (1) | GB2265846B (en) |
| SE (1) | SE506119C2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI97817C (en) * | 1993-10-27 | 1997-02-25 | Valmet Paper Machinery Inc | Method and arrangement for coating a moving track |
| DE19707921C2 (en) * | 1997-02-27 | 1999-11-04 | Kunststoff Zentrum Leipzig | Method and device for dimensionally accurate coating of rotationally symmetrical bodies with radiation-curable flowable or spreadable monomer / oligomer systems |
| DE19801140A1 (en) * | 1998-01-14 | 1999-07-15 | Voith Sulzer Papiertech Patent | Device for the direct or indirect application of a liquid to pasty application medium on a running material web and operating method for such a device |
| DE19822505A1 (en) * | 1998-05-19 | 1999-11-25 | Voith Sulzer Papiertech Patent | System to apply a liquid or paste coating to the surface of a moving web |
| DE10331145A1 (en) | 2003-07-09 | 2005-01-27 | Pama Papiermaschinen Gmbh | Device for the direct or indirect application of liquid to pasty suspensions on paper or board webs |
| DE102005027791A1 (en) | 2005-06-15 | 2006-12-21 | Pama Papiermaschinen Gmbh | Device for applying liquid to pasty suspensions on paper or board webs |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3825816A1 (en) * | 1988-07-29 | 1990-02-01 | Jagenberg Ag | DEVICE FOR CONTINUOUSLY COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
| FI90634C (en) * | 1989-01-17 | 1994-03-10 | Valmet Paper Machinery Inc | Coating device and method for coating a web |
| US5112653A (en) * | 1989-07-03 | 1992-05-12 | Consolidated Papers, Inc. | Method of and apparatus for coating high speed traveling webs |
-
1992
- 1992-04-10 FI FI921588A patent/FI91298C/en active
-
1993
- 1993-02-08 DE DE19934303577 patent/DE4303577A1/en not_active Ceased
- 1993-03-31 CA CA 2093093 patent/CA2093093A1/en not_active Abandoned
- 1993-04-08 SE SE9301183A patent/SE506119C2/en not_active IP Right Cessation
- 1993-04-08 GB GB9307414A patent/GB2265846B/en not_active Expired - Fee Related
- 1993-04-08 FR FR9304179A patent/FR2691179B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2265846A (en) | 1993-10-13 |
| GB2265846B (en) | 1995-12-20 |
| FI91298C (en) | 1994-06-10 |
| SE506119C2 (en) | 1997-11-10 |
| DE4303577A1 (en) | 1993-10-14 |
| FI921588A (en) | 1993-10-11 |
| GB9307414D0 (en) | 1993-06-02 |
| FI91298B (en) | 1994-02-28 |
| SE9301183D0 (en) | 1993-04-08 |
| FR2691179A1 (en) | 1993-11-19 |
| SE9301183L (en) | 1993-10-11 |
| FI921588A0 (en) | 1992-04-10 |
| FR2691179B1 (en) | 1997-07-25 |
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