GB2046138A - Coating a Web - Google Patents

Coating a Web Download PDF

Info

Publication number
GB2046138A
GB2046138A GB8011109A GB8011109A GB2046138A GB 2046138 A GB2046138 A GB 2046138A GB 8011109 A GB8011109 A GB 8011109A GB 8011109 A GB8011109 A GB 8011109A GB 2046138 A GB2046138 A GB 2046138A
Authority
GB
United Kingdom
Prior art keywords
web
doctor blade
coating
metering device
rolling
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.)
Granted
Application number
GB8011109A
Other versions
GB2046138B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jagenberg AG
Jagenberg Werke AG
Original Assignee
Jagenberg AG
Jagenberg Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jagenberg AG, Jagenberg Werke AG filed Critical Jagenberg AG
Publication of GB2046138A publication Critical patent/GB2046138A/en
Application granted granted Critical
Publication of GB2046138B publication Critical patent/GB2046138B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0241—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to elongated work, e.g. wires, cables, tubes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Apparatus (AREA)

Abstract

Apparatus for the continuous coating of a web (4) travelling over a roller (5), in which a rolling doctor blade (1) bears under pre-tension against the web supported on the roller. The coating material is supplied under gravity to the contact point between the doctor blade and the web by overflow from container (8) and inclined plate (15). The container is pivoted at (12) to enable the supply to be interrupted. <IMAGE>

Description

SPECIFICATION Apparatus for the Continuous Application of a Uniform Coating to a Web of Material The invention relates to an apparatus for the continuous application of a uniform coating to a web of material travelling over a roller, in which a rolling doctor blade bears under pre-tension against the web of material supported on the roller and coating material is supplied from above to the contact point.
An apparatus of this type is already known for example from U.S. Patent Specification 2 946 307. In this known apparatus, the coating material is supplied without separate metering to a sump between the rolling doctor blade and the web of material to be coated. According to the nature and viscosity of the coating material, a greater or lesser formation of bubbles occurs in this sump during the coating, which may lead to non-uniformity of the finished coating.
The objective of the invention is to provide an apparatus of the aforedescribed type, which eliminates the drawbacks of the known apparatus and provides an acceptable quality of the coating with a very varied nature and viscosity of the coating material supplied.
This objective is fulfilled according to the invention due to the fact that the coating material can be supplied continuously under the effect of gravity by way of a lock-type pre-metering device to the contact point between the rolling doctor blade and web of material on the roller. The locktype pre-metering device supplies to the contact point of the rolling doctor blade on the web of material only as much coating material as is required for the coating with a slight excess. The coating material is applied to a web of material in a closed layer by pre-metering device and scraped off by the rolling doctor blade at the point of contact without the formation of a sump. Trouble free coating is thus achieved even with greatly varying viscosity of the coating material. The apparatus can thus be used very universally from moistening with water to coating with highly viscous material.
According to one development of the invention, the pre-metering device and rolling doctor blade are incorporated in a frame separate from the machine frame. The apparatus can thus be incorporated subsequently with simple means in existing material-processing lines, in the region of a roller, without fundamental changes to the machine frame becoming necessary.
Appropriately, on the side adjacent the web of material, the pre-metering device comprises a lock wall with upper edge extending parallel to the axis of the rolling doctor blade and a guiding device guiding the coating material in a leakproof manner to the contact point of the rolling doctor blade, in which case the guiding device may comprise an apron adjoining the lock wall at an obtuse angle, the apron having a linear front edge and the guiding device may also comprise deflectors arranged at right angles to the latter, in the region of the side edges of the web of material to be coated. This construction of the premetering device ensures acceptable transfer of the film of coating material to the web of material during pre-metering.
Furthermore, the pre-metering device is advantageously constructed so that it is able to tilt about a pivot parallel to the contact point of the rolling doctor blade. The quantity of coating material flowing over the lock wall can thus be adjusted by tilting the pre-metering device.
The deflectors can be adjusted at right angles to the apron for adjusting the coating width.
In order to be able to stop the pre-metering quickly if necessary, the pre-metering device is appropriately able to be swung away from the web of material, so that the upper edge is raised.
One embodiment of the invention is illustrated in the drawing and is described in detail hereafter.
The single figure of the drawing is a side view of the coating apparatus according to the invention, partly in section.
The coating apparatus illustrated in the drawing comprises a rolling doctor blade 1, with a doctor blade rod 3 mounted to rotate in a resilient rolling doctor blade bed 2. The doctor blade rod 3 is pressed under tension against a web of material 4 to be coated, which is in turn supported by a roller 5.
Above the rolling doctor blade 1, a premetering device 6 is mounted in the same frame 7 as the rolling doctor blade 1. The pre-metering device 6 comprises a container 8 for coating material and on the side adjacent the web of material comprises a lock wall 9 with upper edge 10. The pre-metering device 6 is able to tilt about a pivot 12 extending parallel to the contact line 11 of the doctor blade 3 with the web of material 4. By tilting about this pivot, the quantity of coating material flowing over the upper edge 10 of the lock wall 9 can be adjusted. On the side of the pre-metering device 6 remote from the web of material 4, a rear lock wall 13 is provided, over which excess coating material from the premetering device 6 is discharged to a sump 14.
Adjoining the lower end of the front lock wall 9 at an obtuse angle is an apron 15, which terminates in a linear front edge 16. The front edge 1 6 extends over the entire width of the web of material 4 to be coated. Located at right angles to the lock wall 9 and to the apron 15, in the region of the side edges of the web of material to be coated, are four deflectors 1 7, which extend in a leakproof manner as far as the web of material 4 to be coated. The deflectors can be constructed to be adjustable at right angles to the apron 15, in order to adjust the coating width.
Above the upper edge 10 of the lock wall 9, during the coating operation and according to the tilted osition of the premetering device 6, an adjustable, uniform thick film of coating material is discharged at the apron 15. The front edge 16 of the apron extends in a leakproof manner as far as the web of material 4 to be coated and transfers the pre-metered film of coating material to the web of material 4 to be coated. The rolling doctor blade 1 located at a short distance therebelow receives the fine coating, in which case no sump occurs between the rolling doctor blade 1 and material web 4, but solely the excess coating material which is scraped off passes over the rolling doctor blade 1 and is returned to the sump 14. Thus the formation of bubbles in the region of the rolling doctor blade is largely prevented, whereas a continuous coating film is simultaneously ensured.It is possible to achieve uniform coating for coating materials of varying properties and viscosities. For example, the apparatus is very suitable for the uniform moistening of paper webs with water.
Furthermore, the pre-metering device 6 is able to tilt about the pivot so that the upper edge 10 is raised and then projects by a small amount above the upper edge of the rear lock wall 13. This tilting movement is used for interrupting premetering, due to which only minimal residues of coating material are present on the rolling doctor blade 1 for example in the case of a tear in the web or if the apparatus is stopped. On the other hand, the upper edge 10 of the front lock wall 9 is tilted upwards only so far that the majority of coating material is able to remain in the container 8.
As mentioned, the rolling doctor blade 1 and pre-metering device 6 are mounted on the same frame 7 independently of the machine frame. This fact and the narrow construction of the apparatus facilitate subsequent incorporation in a material web processing line without fundamental changes to the machine frame of the line.

Claims (8)

Claims
1. Apparatus for the continuous application of a uniform coating to a web of material travelling over a roller, in which a rolling doctor blade bears under pre-tension against the web of material supported on the roller and coating material is supplied from above to the point of contact, wherein the coating material can be supplied continuously under the action of gravity by way of a lock-type pre-metering device to the contact point between the rolling doctor blade and the web of material on the roller.
2. Apparatus according to claim 1, wherein the pre-metering device and the rolling doctor blade are incorporated in a common frame separated from the frame of the machine.
3. Apparatus according to claim 1 or 2, wherein on the side adjacent the web of material, the pre-metering device comprises a lock wall with an upper edge extending parallel to the axis of the rolling doctor blade and a guiding device guiding the coating material in a leakproof manner to the contact point of the rolling doctor blade.
4. Apparatus according to claim 3, wherein the guiding device comprises an apron adjoining the lock wall at a obtuse angle, which apron has a linear front edge and deflectors arranged at right angles hereto, in the region of the side edges of the web of material to be coated.
5. Apparatus according to one of the preceding claims, wherein the pre-metering device is able to tilt about a pivot parallel to the contact point of the rolling doctor blade.
6. Apparatus according to claim 4, wherein the deflectors are arranged to be adjustable at right angles to the apron.
7. Apparatus according to claim 5, wherein the pre-metering device can be swung away from the web of material so that the upper edge is raised.
8. Apparatus for the continuous application of a uniform coating to a web of material, substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB8011109A 1979-04-10 1980-04-02 Coating a web Expired GB2046138B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2914531A DE2914531C2 (en) 1979-04-10 1979-04-10 Device for the continuous application of a uniform coating to a material web

Publications (2)

Publication Number Publication Date
GB2046138A true GB2046138A (en) 1980-11-12
GB2046138B GB2046138B (en) 1983-03-16

Family

ID=6068000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8011109A Expired GB2046138B (en) 1979-04-10 1980-04-02 Coating a web

Country Status (8)

Country Link
JP (1) JPS55139864A (en)
BR (1) BR8002177A (en)
DE (1) DE2914531C2 (en)
ES (1) ES490366A0 (en)
FI (1) FI63340C (en)
GB (1) GB2046138B (en)
IT (1) IT1141533B (en)
SE (1) SE8002685L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521459A (en) * 1982-05-19 1985-06-04 Fuji Photo Film Co., Ltd. Coating method and apparatus
US4946823A (en) * 1988-02-19 1990-08-07 Kanzaki Paper Manufacturing Co., Ltd. Heat-sensitive record material
EP0794011A1 (en) * 1996-03-08 1997-09-10 Sollac S.A. Device for applying a liquid resin on a moving web
US6033477A (en) * 1996-12-18 2000-03-07 Voith Sulzer Papiermaschinen Gmbh Apparatus for joining at least one actuator to at least one oblong working unit of a coating system, allowing translatory and/or rotary adjustment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027738A1 (en) * 1993-05-28 1994-12-08 Tybar Engineering Pty Ltd Adhesive application system
DE19748684A1 (en) * 1997-11-04 1999-05-06 Voith Sulzer Papiertech Patent Moving web coating applicator for coating paper or cardboard

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946307A (en) * 1955-12-23 1960-07-26 Champion Paper & Fibre Co Apparatus for coating paper
JPS53118442A (en) * 1977-03-26 1978-10-16 Konishiroku Photo Ind Painting method
DE2722330A1 (en) * 1977-05-17 1978-11-30 Brueckner Apparatebau Gmbh Pile fabric fluid film applicator - has a float in a vessel to support applicator to prevent any temp. effects
DE2752982A1 (en) * 1977-11-28 1979-05-31 Vepa Ag Textile web coating appts. with weir overflow - has edge of overflow blade scanned for deflection due to temp. variation to correct deflection for uniform layer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521459A (en) * 1982-05-19 1985-06-04 Fuji Photo Film Co., Ltd. Coating method and apparatus
US4946823A (en) * 1988-02-19 1990-08-07 Kanzaki Paper Manufacturing Co., Ltd. Heat-sensitive record material
EP0794011A1 (en) * 1996-03-08 1997-09-10 Sollac S.A. Device for applying a liquid resin on a moving web
FR2745732A1 (en) * 1996-03-08 1997-09-12 Lorraine Laminage DEVICE FOR COATING LIQUID RESIN ON A SCROLLING STRIP
US6033477A (en) * 1996-12-18 2000-03-07 Voith Sulzer Papiermaschinen Gmbh Apparatus for joining at least one actuator to at least one oblong working unit of a coating system, allowing translatory and/or rotary adjustment

Also Published As

Publication number Publication date
IT8021248A0 (en) 1980-04-09
FI63340B (en) 1983-02-28
FI801126A (en) 1980-10-11
BR8002177A (en) 1980-11-25
JPS55139864A (en) 1980-11-01
ES8102851A1 (en) 1981-02-16
IT1141533B (en) 1986-10-01
ES490366A0 (en) 1981-02-16
DE2914531A1 (en) 1980-10-16
DE2914531C2 (en) 1982-04-08
GB2046138B (en) 1983-03-16
SE8002685L (en) 1980-10-11
FI63340C (en) 1983-06-10

Similar Documents

Publication Publication Date Title
US4056423A (en) Platemaking apparatus
US3930464A (en) Apparatus for applying a coating composition onto a web
US3179536A (en) Method and apparatus for coating paper
US3192895A (en) Web coating apparatus
US4354449A (en) Two sided coater
US4643127A (en) Coating device for uniform web coating
FI58960B (en) SEAT OVER ANORDNING FOR DOUBLE BEARING BUTTON
GB2034608A (en) Glue application to corrugated pasteboard web
JPH05123626A (en) Method and device for coating web moving at high speed
NL8004532A (en) METHOD AND APPARATUS FOR CONTINUOUS TREATMENT OF TEXTILE AND SIMILAR TRACK.
JPS58177179A (en) Apparatus for uniformly applying prescribable liquid amount on roller or flat strip material
US4822640A (en) Coater
US4738877A (en) Apparatus for coating moving strips of material
CA2007132C (en) Inverted blade metering unit and method for blade-coating a material web
US4615295A (en) Doctor blade apparatus for coating apparatus
GB2178677A (en) Coating webs
GB2046138A (en) Coating a Web
US6475281B1 (en) Applicator for direct or indirect application of a liquid or pasty coating medium onto a traveling material web
EP0458035B1 (en) Device for applying a liquid coating product on sheet-like materials
USRE31695E (en) Two sided coater
US4887547A (en) Apparatus for continuously applying a uniform coating to a material web
US20040241328A1 (en) Method and adhesive applicator unit for continuous application of adhesive to webs
US2474691A (en) Web coating apparatus
US5749972A (en) Apparatus for the application of at least one liquid medium onto a moving material web
US6066208A (en) Apparatus for coating a continuously moving web

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee