CA1180180A - Arrangement for web coating - Google Patents
Arrangement for web coatingInfo
- Publication number
- CA1180180A CA1180180A CA000387480A CA387480A CA1180180A CA 1180180 A CA1180180 A CA 1180180A CA 000387480 A CA000387480 A CA 000387480A CA 387480 A CA387480 A CA 387480A CA 1180180 A CA1180180 A CA 1180180A
- Authority
- CA
- Canada
- Prior art keywords
- coating
- web
- slot
- coating substance
- substance
- 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
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
- B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
-
- 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
- D21H23/78—Controlling or regulating not limited to any particular process or apparatus
-
- 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
-
- 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
- D21H5/006—Controlling or regulating
Abstract
ABSTRACT
An arrangement for one-sided or two-sided coating of a basically upwardly moving web, in particular a paper web. An excess amount of coating substance is supplied onto the web and the coating substance sticking thereto is evened by pulling the web through a coating nip formed by a flexible blade and a back-up member. There is a coating chamber being open against the web and including means for supplying coating substance to the chamber. At the bottom of the chamber, at a considerable distance from the coating nip, there is a narrow slot through which the web moves basically without any contact with the edges of the slot. The coating substance supply to the chamber and the width of the slot are so adapted to the speed of the web and to the coating substance viscosity, that only a small amount of coating substance flows downwards through the slot during normal operation of the arrangement.
An arrangement for one-sided or two-sided coating of a basically upwardly moving web, in particular a paper web. An excess amount of coating substance is supplied onto the web and the coating substance sticking thereto is evened by pulling the web through a coating nip formed by a flexible blade and a back-up member. There is a coating chamber being open against the web and including means for supplying coating substance to the chamber. At the bottom of the chamber, at a considerable distance from the coating nip, there is a narrow slot through which the web moves basically without any contact with the edges of the slot. The coating substance supply to the chamber and the width of the slot are so adapted to the speed of the web and to the coating substance viscosity, that only a small amount of coating substance flows downwards through the slot during normal operation of the arrangement.
Description
O
ARRANGEMENT FOR WEB COATING
The invention relates to an arrangement for one-sided or two-sided coating of a basically upwardly moving web, for instance a paper web~ by means of providing an excess supply of coating S substance onto the web and evening of the coating substance sticking thereto by pulling the web through a coating nip formed by a flexible coating blade and a back-up member.
In web coating arrangements, in which the web is pulled upwards through a nip formed by evening blades, the qpreading ND of coating substance on the web usually takes part below the nip by means of a spreading apparatus. In a known arrangement the spreading apparatus comprises two rolls forming a nip through which the web i~ pulled. The coating substance is supplied onto the roll , wherefrom it is transferred and spread onto the web. At high wsb speeds, one difficulty is due to web slip in the spreading nip, which causes uneven coating substance transPer to the web. On the other hand 3 the nip may be tightened in order to avoid web slip. This, however, often causes web ruptures a~ a consequence of the inertia of the aO masBive spreading rolls, which unable~ them to follow fast web speed changes. Another known coater construction comprises spreading nozsles in 11eu of the spreading rolls. Also with this arrangement it is difficult to spread coatirg substance uniformly on the web.
A common feature of both these known constructions is that, in the spreading phase, a portion of the coating substance i5 removed from the web. This excess amount has to be pumped back to the spreading point, and this forms an extra, uneconomical S step of the proces3. Further, an additional recycling circuit has to be provided for recycling the coating sub~tance scraped off by the evening blades. This complicates the construction and encreases the manufacturing c03ts.
The object of the invention is to provide a web coating ar-/ rangement, in which the spreading of the coating substance, also at high web ~peeds, is carried out in a reliable and economical way and with a homogeneous and even result. An arrangement acoording to the invention has low manufaoturing costs and the amount of recycled coating substance is lS minimized. Thi~ results in an improved coating economy. Also the coating ~ubqtance scraped off from the web by the coating nip blades, iq collected for reusa without any pumping action The invention is charaoterized in that a ooating chamber is formed, inoluding means for qupplying ooating 3ubstano0 ~0 thereto, said coating chamber being open against said web and having at its bottom, at a conqiderable distance from said coating nip, a narrow slot through which the web is moved basically without any contact with the edges of said slot, the substance supply to said chamber and the width of said lot being so adapted to the speed of said web and to the coating substance viscosity, that only a small amount of coating 8~
substance ~lows downwards through the slot during normal operation of the arrangement The web is in direct contact with the coating substance in the coating chamber. The moving web then carries away coating substance, which contributes to a firm adherance of coating substance all over the web surface. The excess coating substance scraped off by the coating blade is, even at high web speeds, collected in the coating chamber for immediate reuse without any pumping mean~. Since only a small amount of ~ coating substance passes through the bottom 510t downwards, a column of coating substance is formed in the coating chamber.
This provide~ a large and uniform contact between the web and the coating substance. Moreover, the construction is econo-mical as a re~ult of the very small amount of coating ~S substance passing down below the coating chamber. When the viscosity o~ the substance is optimized relatively to the web speed, no coating substance at all will ~low down below the chamber. Naturally, no pumping means will then be needed for recycling coating substance.
ao The coa-ting substance level in the coating chamber can easily be adjusted by means of an over~low edge or duct being preferably vertically adjustable. The construction can bs ~urther improved by limiting the width of the slot to at the most 5 cm, pre~erably at the most 1 cm. Then a coating
ARRANGEMENT FOR WEB COATING
The invention relates to an arrangement for one-sided or two-sided coating of a basically upwardly moving web, for instance a paper web~ by means of providing an excess supply of coating S substance onto the web and evening of the coating substance sticking thereto by pulling the web through a coating nip formed by a flexible coating blade and a back-up member.
In web coating arrangements, in which the web is pulled upwards through a nip formed by evening blades, the qpreading ND of coating substance on the web usually takes part below the nip by means of a spreading apparatus. In a known arrangement the spreading apparatus comprises two rolls forming a nip through which the web i~ pulled. The coating substance is supplied onto the roll , wherefrom it is transferred and spread onto the web. At high wsb speeds, one difficulty is due to web slip in the spreading nip, which causes uneven coating substance transPer to the web. On the other hand 3 the nip may be tightened in order to avoid web slip. This, however, often causes web ruptures a~ a consequence of the inertia of the aO masBive spreading rolls, which unable~ them to follow fast web speed changes. Another known coater construction comprises spreading nozsles in 11eu of the spreading rolls. Also with this arrangement it is difficult to spread coatirg substance uniformly on the web.
A common feature of both these known constructions is that, in the spreading phase, a portion of the coating substance i5 removed from the web. This excess amount has to be pumped back to the spreading point, and this forms an extra, uneconomical S step of the proces3. Further, an additional recycling circuit has to be provided for recycling the coating sub~tance scraped off by the evening blades. This complicates the construction and encreases the manufacturing c03ts.
The object of the invention is to provide a web coating ar-/ rangement, in which the spreading of the coating substance, also at high web ~peeds, is carried out in a reliable and economical way and with a homogeneous and even result. An arrangement acoording to the invention has low manufaoturing costs and the amount of recycled coating substance is lS minimized. Thi~ results in an improved coating economy. Also the coating ~ubqtance scraped off from the web by the coating nip blades, iq collected for reusa without any pumping action The invention is charaoterized in that a ooating chamber is formed, inoluding means for qupplying ooating 3ubstano0 ~0 thereto, said coating chamber being open against said web and having at its bottom, at a conqiderable distance from said coating nip, a narrow slot through which the web is moved basically without any contact with the edges of said slot, the substance supply to said chamber and the width of said lot being so adapted to the speed of said web and to the coating substance viscosity, that only a small amount of coating 8~
substance ~lows downwards through the slot during normal operation of the arrangement The web is in direct contact with the coating substance in the coating chamber. The moving web then carries away coating substance, which contributes to a firm adherance of coating substance all over the web surface. The excess coating substance scraped off by the coating blade is, even at high web speeds, collected in the coating chamber for immediate reuse without any pumping mean~. Since only a small amount of ~ coating substance passes through the bottom 510t downwards, a column of coating substance is formed in the coating chamber.
This provide~ a large and uniform contact between the web and the coating substance. Moreover, the construction is econo-mical as a re~ult of the very small amount of coating ~S substance passing down below the coating chamber. When the viscosity o~ the substance is optimized relatively to the web speed, no coating substance at all will ~low down below the chamber. Naturally, no pumping means will then be needed for recycling coating substance.
ao The coa-ting substance level in the coating chamber can easily be adjusted by means of an over~low edge or duct being preferably vertically adjustable. The construction can bs ~urther improved by limiting the width of the slot to at the most 5 cm, pre~erably at the most 1 cm. Then a coating
2 S substance ~low downwards through the slot is easily prevented also at low web speeds.
1~ 8~
The coating can favourably be carried out with a coating substance having a dynamic viscosity higher than 1 mPas.
Thereby, the use of, for instance, water soluble sizing components requires just small amounts of water, which
1~ 8~
The coating can favourably be carried out with a coating substance having a dynamic viscosity higher than 1 mPas.
Thereby, the use of, for instance, water soluble sizing components requires just small amounts of water, which
3 reduces the need for web drying, thus improving the economy of the process.
The coating substance which has possibly flown down through the bottom slot is preferably collected in a tank or trough below the slot. Naturally, also the coating substance flow ~0 coming from the level regulating means of the coating chamber can be collected in the same tark or trough.
A favourable embodiment of the invention is obtained by making the angle between the web and the flexible blade in the coating nip smaller thar. 40. This mak0s the mounting of the /~ blade easier and decreases the risk of web damages. Another favourable embodiment of the invention uses a roll as a back-up member in the coating nip. The roll rotates with a speed at least approximately corresponding to the web speed. This embodiment is very suitabley for example, when the web is aO simultaneuosly ~ubject to size press coating and pigment coating. The ~ame device can easlly be used for normal one-side coating, also. The arrangement is applicable for low and high web speeds as well.
A ~uitable back-up member for the coating nip can be formed as a plate extending vertically upwards slightly above the 1~8~
coating nip and downwards to or past the bottom level of the collection tank or trough. The width of the plate should correspond to or exceed the web width. By this meanq the web is simply and firmly supported at its one side and the nip S back-up member as well as the slot limiting member are formed by one single member.
In an arrangement according to the invention, the members located at the opposite sides of the web may be fully or partly identical. For two-sided coating a coating chamber can J4 be arranged at both sides of the web, preferably at the same vertical level. These chambers may be supplied with the same kind or with different kinds of coating substance. In the latter case, the slot widths and liquid level positions at both sides may be considerably different.
.
ls In order to obtain an uniform coating result, the arrangement can be provided with a load member applying an adjustable pressure on the fle~ible coating blade, as known per se.
In the following, the invention will be described more in detail with reference to the attached drawing, in which 0 - Figure 1 i9 a schematical perspective view of an arrange-ment according to the invention, - Figure 2 shows a sectional side view of a first embodiment of the invention, - Figure 3 shows a sectional slde view of a second embodiment of the invention, - Figure 4 shows a sectional side view of a third embodiment of the invention, - Figure 5 shows a sectional side view of a fourth embodiment of the invention.
In the drawing, reference numeral 1 indicates a moving web, which is pulled through a coating nip 4 formed between a flexible blade 2 and a back-up member 3. The running direc-/0 tion of the web is indicated by an arrow. A narrow slot 5 isformed below nip 4. Slot 5 is ~ormed between a slot limiting member 6 and the edge 11 of an adjustable slot width regulator 10. The slot width is infinitely variable up to a~maximum of preferably 5 cm. Back-up member 3 and limiting member 6 may be ~S separate or combined to a single member, which may be a roll9 a flexible or a rigid plate or a fixed web guide member. A
coating chamber 7 is formed above slot 5. This chamber is limited by the web 1, the flexible blade 2, a back wall 8 and side walls 8a. A ~upport plate 9 is connected to slot width a~ regulator 10, which is movably suspended so as to allow adjustment of the width of slot 5. For example, width regulator 10 may be provided with threaded members so arranged, that turning of the members causes adjustment of the width of slot 5.
1~8~
Coating substance 16 is supplied to chamber 7 through a supply duct 13. A collecting tank 12, open against web 1, i9 arranged below slok 5. The small amounts of coating substance flown through slot 5 and collected in tank 12 are recycled to 3 chamber 7 through an outlet duct 14, which via pumping means (not shown) is connected to ~upply duct 13. Chamber 7 is provided with means for regulating the level of coating ~ubstanoe contained therein. For example, coating sub~tance may flow over edge ~c of side wall 8a into tank 12. The edge 8c is preferably vertically adjustable.
The embodiment of Figure 3 includes a roll 15, which at the same time forms the back up member for flexible blade 2 and the limiting member for slot 5. Roll 15 is rotated in the running direction of web 1.
1s The embodiment acoording to Figure 4, basically symmetric relative to vertical web 1, is used for two-sided coating. It is, however, not necessary to use a ~ymmetrical coating arrangement. If 7 for instance, different coating ~ub tances with different vi~cosity are supplied to chambers 7 at ~0 opposite sides of the web, the slot regulating edges 11 may be at different distances from web 1.
Collecting tank 12 is suspended at coating chamber wall 8.
Tank 12 can al~o be formed in one piece with wall 8 by pro~
viding the latter with a long, downwards extending portion bent at its lower edge towards web 1 to form a trough. The trough or tank 12 may extend outside the qide edge~ of web 1.
V~8~
The back-up member of coating nip 4 and the limiting member of slot 5 may be combined into a single, mainly rigid web guiding plate 17, as shown in Figure 5.
The invention is not limited to the embodiments described, but S several modif.ications thereof are feasible within the ~cope of the claims. For example, slot width regulator 10 can be rotatably attached to the inside of ~ide wall 8. The axis of rotation should then be parallel to slot 5 and excentric with re~pect to slot width regulator 10.
The coating substance which has possibly flown down through the bottom slot is preferably collected in a tank or trough below the slot. Naturally, also the coating substance flow ~0 coming from the level regulating means of the coating chamber can be collected in the same tark or trough.
A favourable embodiment of the invention is obtained by making the angle between the web and the flexible blade in the coating nip smaller thar. 40. This mak0s the mounting of the /~ blade easier and decreases the risk of web damages. Another favourable embodiment of the invention uses a roll as a back-up member in the coating nip. The roll rotates with a speed at least approximately corresponding to the web speed. This embodiment is very suitabley for example, when the web is aO simultaneuosly ~ubject to size press coating and pigment coating. The ~ame device can easlly be used for normal one-side coating, also. The arrangement is applicable for low and high web speeds as well.
A ~uitable back-up member for the coating nip can be formed as a plate extending vertically upwards slightly above the 1~8~
coating nip and downwards to or past the bottom level of the collection tank or trough. The width of the plate should correspond to or exceed the web width. By this meanq the web is simply and firmly supported at its one side and the nip S back-up member as well as the slot limiting member are formed by one single member.
In an arrangement according to the invention, the members located at the opposite sides of the web may be fully or partly identical. For two-sided coating a coating chamber can J4 be arranged at both sides of the web, preferably at the same vertical level. These chambers may be supplied with the same kind or with different kinds of coating substance. In the latter case, the slot widths and liquid level positions at both sides may be considerably different.
.
ls In order to obtain an uniform coating result, the arrangement can be provided with a load member applying an adjustable pressure on the fle~ible coating blade, as known per se.
In the following, the invention will be described more in detail with reference to the attached drawing, in which 0 - Figure 1 i9 a schematical perspective view of an arrange-ment according to the invention, - Figure 2 shows a sectional side view of a first embodiment of the invention, - Figure 3 shows a sectional slde view of a second embodiment of the invention, - Figure 4 shows a sectional side view of a third embodiment of the invention, - Figure 5 shows a sectional side view of a fourth embodiment of the invention.
In the drawing, reference numeral 1 indicates a moving web, which is pulled through a coating nip 4 formed between a flexible blade 2 and a back-up member 3. The running direc-/0 tion of the web is indicated by an arrow. A narrow slot 5 isformed below nip 4. Slot 5 is ~ormed between a slot limiting member 6 and the edge 11 of an adjustable slot width regulator 10. The slot width is infinitely variable up to a~maximum of preferably 5 cm. Back-up member 3 and limiting member 6 may be ~S separate or combined to a single member, which may be a roll9 a flexible or a rigid plate or a fixed web guide member. A
coating chamber 7 is formed above slot 5. This chamber is limited by the web 1, the flexible blade 2, a back wall 8 and side walls 8a. A ~upport plate 9 is connected to slot width a~ regulator 10, which is movably suspended so as to allow adjustment of the width of slot 5. For example, width regulator 10 may be provided with threaded members so arranged, that turning of the members causes adjustment of the width of slot 5.
1~8~
Coating substance 16 is supplied to chamber 7 through a supply duct 13. A collecting tank 12, open against web 1, i9 arranged below slok 5. The small amounts of coating substance flown through slot 5 and collected in tank 12 are recycled to 3 chamber 7 through an outlet duct 14, which via pumping means (not shown) is connected to ~upply duct 13. Chamber 7 is provided with means for regulating the level of coating ~ubstanoe contained therein. For example, coating sub~tance may flow over edge ~c of side wall 8a into tank 12. The edge 8c is preferably vertically adjustable.
The embodiment of Figure 3 includes a roll 15, which at the same time forms the back up member for flexible blade 2 and the limiting member for slot 5. Roll 15 is rotated in the running direction of web 1.
1s The embodiment acoording to Figure 4, basically symmetric relative to vertical web 1, is used for two-sided coating. It is, however, not necessary to use a ~ymmetrical coating arrangement. If 7 for instance, different coating ~ub tances with different vi~cosity are supplied to chambers 7 at ~0 opposite sides of the web, the slot regulating edges 11 may be at different distances from web 1.
Collecting tank 12 is suspended at coating chamber wall 8.
Tank 12 can al~o be formed in one piece with wall 8 by pro~
viding the latter with a long, downwards extending portion bent at its lower edge towards web 1 to form a trough. The trough or tank 12 may extend outside the qide edge~ of web 1.
V~8~
The back-up member of coating nip 4 and the limiting member of slot 5 may be combined into a single, mainly rigid web guiding plate 17, as shown in Figure 5.
The invention is not limited to the embodiments described, but S several modif.ications thereof are feasible within the ~cope of the claims. For example, slot width regulator 10 can be rotatably attached to the inside of ~ide wall 8. The axis of rotation should then be parallel to slot 5 and excentric with re~pect to slot width regulator 10.
Claims (8)
1. An arrangement for one-sided or two-sided coating of a basically upwardly moving web, such as a paper web, by means of providing an excess supply of coating substance onto said web and providing evening of coating substance sticking to said web by pulling the web through a coating nip formed between a flexible coating blade and a back-up member, said arrangement including a coating chamber provided with means for supplying coating substance thereto, said coating chamber being open against said web and having at its bottom, at a considerable distance from said coating nip, a narrow slot through which said web is moved basically without any contact with the edges of said slot, the coating substance supply to said chamber and the width of said slot being so adapted to the speed of said web and to the viscosity of said coating substance, that only a small amount of coating substance flows downwards through said slot during normal operation of the arrangement.
2. An arrangement according to claim 1, in which the level of coating substance above said slot is determined by means of overflow means including a duct or an overflow edge, said duct or edge preferably being vertically adjustable.
3. An arrangement according to claim 1 or 2, in which the width of said slot is at the most 5 cm, preferably at the most 1 cm.
4. An arrangement according to claim 1 or 2, in which said coating substance has a dynamic viscosity higher than 1 mPas.
5. An arrangement according to claim 1 or 2, in which, below said slot, there is a collecting tank or trough, arranged to collect coating substance passing said slot.
6. An arrangement according to claim 1 or 2, in which the angle between said web and said coating blade is smaller than 40°.
7. An arrangement according to claim 1 or 2, in which said back-up member is a roll following the movement of said web.
8. An arrangement according to claim 1 or 2, in which said back-up member is a plate extending vertically slightly above said coating nip and downwards approximately to the bottom level of said collecting tank or trough.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI803184 | 1980-10-08 | ||
| FI803184A FI66042C (en) | 1980-10-08 | 1980-10-08 | ANORDNING FOER BESTRYKNING AV BANA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1180180A true CA1180180A (en) | 1985-01-02 |
Family
ID=8513844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000387480A Expired CA1180180A (en) | 1980-10-08 | 1981-10-07 | Arrangement for web coating |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5791768A (en) |
| AT (1) | AT377027B (en) |
| AU (1) | AU549823B2 (en) |
| CA (1) | CA1180180A (en) |
| CH (1) | CH656559A5 (en) |
| DE (1) | DE3139740A1 (en) |
| FI (1) | FI66042C (en) |
| FR (1) | FR2491354B1 (en) |
| GB (1) | GB2085327B (en) |
| IT (1) | IT1139641B (en) |
| NL (1) | NL8104593A (en) |
| NO (1) | NO813401L (en) |
| SE (1) | SE8105971L (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI68770C (en) * | 1983-05-12 | 1985-11-11 | Waertsilae Oy Ab | BESTRYKARE |
| FI68369C (en) * | 1983-03-01 | 1985-09-10 | Waertsilae Oy Ab | coating method |
| FI72903C (en) * | 1984-04-17 | 1987-08-10 | Ahlstroem Oy | Method and apparatus for coating web. |
| TW199911B (en) * | 1991-12-04 | 1993-02-11 | Armco Steel Co Lp | |
| DE29501918U1 (en) * | 1995-02-07 | 1995-04-06 | Vits Maschinenbau Gmbh | Device for impregnating webs of porous material |
| SE532696C2 (en) * | 2007-07-09 | 2010-03-16 | Mattssonfoeretagen I Uddevalla | Coating device for double-sided coating of paper or cardboard |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2372248A (en) * | 1943-11-23 | 1945-03-27 | Bouton Foster Co | Coating apparatus |
| US3179536A (en) * | 1961-05-19 | 1965-04-20 | Kimberly Clark Co | Method and apparatus for coating paper |
| NL290038A (en) * | 1962-03-12 | |||
| GB1373998A (en) * | 1971-01-27 | 1974-11-13 | Inventing Ab | Method and a device for applying a coating composition to a web |
| NO141953C (en) * | 1973-11-16 | 1980-06-04 | Billeruds Ab | PROCEDURE AND APPARATUS FOR CONTINUOUS POSITION OF A CURRENT COAT, LIKE A PAPER COAT |
| SE394963B (en) * | 1974-02-11 | 1977-07-25 | Inventing Ab | SET AND DEVICE FOR TWO-SIDED COATING OF A PAPER PATH |
| DE2511320A1 (en) * | 1974-03-16 | 1975-09-25 | Tokyo Shibaura Electric Co | Metal strip coating continuous strand - has coating troughs with flexible seals and overflow trough recycling system |
| SE419946B (en) * | 1974-10-16 | 1981-09-07 | Inventing Ab | SET AND DEVICE FOR COATING A CURRENT COAT |
| SE7413068L (en) * | 1974-10-16 | 1976-04-20 | Inventing Ab | SET AND DEVICE FOR COATING A PAPER PATH |
| SE424509B (en) * | 1975-08-26 | 1982-07-26 | Inventing Ab | SET AND DEVICE FOR A DOUBLE SIDE COATING OF A CURRENT COAT |
| US4063531A (en) * | 1976-02-03 | 1977-12-20 | Beloit Corporation | Coater for both sides of traveling web |
| FR2476165A2 (en) * | 1979-03-14 | 1981-08-21 | Centre Tech Ind Papier | METHOD AND DEVICE FOR CONTINUOUSLY COATING A SHEET ELEMENT, IN PARTICULAR A BAND OF PAPER OR CARDBOARD |
-
1980
- 1980-10-08 FI FI803184A patent/FI66042C/en not_active IP Right Cessation
-
1981
- 1981-10-06 AT AT0429281A patent/AT377027B/en not_active IP Right Cessation
- 1981-10-06 DE DE19813139740 patent/DE3139740A1/en not_active Withdrawn
- 1981-10-06 AU AU76056/81A patent/AU549823B2/en not_active Ceased
- 1981-10-07 NO NO813401A patent/NO813401L/en unknown
- 1981-10-07 CH CH6442/81A patent/CH656559A5/en not_active IP Right Cessation
- 1981-10-07 GB GB8130310A patent/GB2085327B/en not_active Expired
- 1981-10-07 CA CA000387480A patent/CA1180180A/en not_active Expired
- 1981-10-08 SE SE8105971A patent/SE8105971L/en not_active Application Discontinuation
- 1981-10-08 IT IT24393/81A patent/IT1139641B/en active
- 1981-10-08 JP JP56160860A patent/JPS5791768A/en active Pending
- 1981-10-08 NL NL8104593A patent/NL8104593A/en not_active Application Discontinuation
- 1981-10-08 FR FR8118928A patent/FR2491354B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ATA429281A (en) | 1984-06-15 |
| AU549823B2 (en) | 1986-02-13 |
| AU7605681A (en) | 1982-04-22 |
| DE3139740A1 (en) | 1982-06-16 |
| AT377027B (en) | 1985-01-25 |
| IT8124393A0 (en) | 1981-10-08 |
| GB2085327B (en) | 1984-05-16 |
| JPS5791768A (en) | 1982-06-08 |
| FI803184L (en) | 1982-04-09 |
| FI66042C (en) | 1984-08-10 |
| NO813401L (en) | 1982-04-13 |
| FI66042B (en) | 1984-04-30 |
| CH656559A5 (en) | 1986-07-15 |
| FR2491354A1 (en) | 1982-04-09 |
| SE8105971L (en) | 1982-04-09 |
| NL8104593A (en) | 1982-05-03 |
| GB2085327A (en) | 1982-04-28 |
| FR2491354B1 (en) | 1985-12-20 |
| IT1139641B (en) | 1986-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |