EP0574384A1 - Procedure and means for controlling a doctor coating process - Google Patents

Procedure and means for controlling a doctor coating process

Info

Publication number
EP0574384A1
EP0574384A1 EP19910912122 EP91912122A EP0574384A1 EP 0574384 A1 EP0574384 A1 EP 0574384A1 EP 19910912122 EP19910912122 EP 19910912122 EP 91912122 A EP91912122 A EP 91912122A EP 0574384 A1 EP0574384 A1 EP 0574384A1
Authority
EP
European Patent Office
Prior art keywords
coating
coating means
web
following
relative
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.)
Withdrawn
Application number
EP19910912122
Other languages
German (de)
English (en)
French (fr)
Inventor
Markku Niemi
Helena Jokinen
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.)
KESKUSLABORATORIO - CENTRALLABORATORIUM Oy AB
Original Assignee
KESKUSLABORATORIO - CENTRALLABORATORIUM Oy AB
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 KESKUSLABORATORIO - CENTRALLABORATORIUM Oy AB filed Critical KESKUSLABORATORIO - CENTRALLABORATORIUM Oy AB
Publication of EP0574384A1 publication Critical patent/EP0574384A1/en
Withdrawn legal-status Critical Current

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
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D21H23/72—Plural serial stages only
    • 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
    • B05C9/06—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 two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side 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
    • D21H23/02—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

Definitions

  • the present invention concerns a procedure for controlling the doctor coating of a moving paper web, on the surface of the web being applied coating materi ⁇ al in at least two steps, the coating being levelled and the excess being removed by scraping.
  • the coating process can be controlled in a more versatile manner than be ⁇ fore.
  • the dry matter content of the surface paste may, for instance, be increased and that of the thickener reduced because no immediate water draining occurs from the paste. The changes will improve both gloss and roughness.
  • greater freedom of choice than before can be exercised as to the composition of the paste.
  • Fig. 1 a means according to the invention for coating a paper web 1 in three steps.
  • the means comprises a preceding coating means 2, a follow ⁇ ing coating means 5 and an additional coating means 9.
  • the coating means have been disposed in conjunction with a backing roll 12, which constitutes the base 8 for the web.
  • the coating means 2, 5 and 9 further com ⁇ prise a preceding applicator 4, a following applicator 6 and, respectively, an additional applicator 10.
  • the three coating means further comprise a preceding doctor blade 4, a following doctor blade 7 and an additional doctor blade 11.
  • the web 1 is conducted to run, in the direction of travel indicated by arrows 5, around the backing roll 12.
  • the preceding coating means 2 can be moved relative to the following coating means 5 and to the additional coating means 9, in the web travel direction. Furthermore, the addition ⁇ al coating means 9 can be moved relative to the preced ⁇ ing coating means 2 and to the following coating means 5, in the web travel direction.
  • the structural design of the coating means 2

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)
  • Coating Apparatus (AREA)
EP19910912122 1990-06-26 1991-06-26 Procedure and means for controlling a doctor coating process Withdrawn EP0574384A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI903204A FI86318C (sv) 1990-06-26 1990-06-26 Förfarande och anordning för att reglera bladbestrykning
FI903204 1990-06-26

Publications (1)

Publication Number Publication Date
EP0574384A1 true EP0574384A1 (en) 1993-12-22

Family

ID=8530696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910912122 Withdrawn EP0574384A1 (en) 1990-06-26 1991-06-26 Procedure and means for controlling a doctor coating process

Country Status (5)

Country Link
EP (1) EP0574384A1 (sv)
JP (1) JPH06501192A (sv)
CA (1) CA2086249A1 (sv)
FI (1) FI86318C (sv)
WO (1) WO1992000419A1 (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI95947C (sv) * 1994-06-29 1996-04-10 Valmet Paper Machinery Inc Förfarande och anordning för bestrykning av en rörlig pappersbana
FI109216B (sv) * 1996-03-06 2002-06-14 Metso Paper Inc Förfarande och anordning för bestrykning av en löpande bana
DE29610395U1 (de) * 1996-06-13 1996-08-22 Voith Sulzer Papiermasch Gmbh Vorrichtung zum aufeinanderfolgenden Auftragen von zwei Schichten von flüssigen oder pastösen Medien auf eine Seite einer laufenden Materialbahn
DE19623622A1 (de) * 1996-06-13 1997-12-18 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Beschichtung einer laufenden Materialbahn

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8508431D0 (en) * 1985-04-01 1985-05-09 English Clays Lovering Pochin Paper coating apparatus
FI75199C (sv) * 1986-04-30 1988-05-09 Yhtyneet Paperitehtaat Oy Belagt papper, kartong eller dylikt samt förfarande och anläggning för tillverkning av detsamma.
JPH0677709B2 (ja) * 1986-11-28 1994-10-05 三菱重工業株式会社 転写装置
EP0352465A3 (de) * 1988-07-27 1990-10-10 J.M. Voith GmbH Auftragseinrichtung zur Beschichtung laufender Warenbahnen sowie Verfahren zur Beschichtung
FI885678A (fi) * 1988-12-07 1990-06-08 Keskuslaboratorio Foerfarande och anordning foer belaeggning av en pappersbana i aotminstone tvao steg.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9200419A1 *

Also Published As

Publication number Publication date
JPH06501192A (ja) 1994-02-10
WO1992000419A1 (en) 1992-01-09
FI86318B (fi) 1992-04-30
FI903204A (fi) 1991-12-27
CA2086249A1 (en) 1991-12-27
FI86318C (sv) 1992-08-10
FI903204A0 (fi) 1990-06-26

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19940803

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18D Application deemed to be withdrawn

Effective date: 19950704