EP0423492A2 - Installation pour doser le couchage des bandes de papier ou de carton - Google Patents

Installation pour doser le couchage des bandes de papier ou de carton Download PDF

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Publication number
EP0423492A2
EP0423492A2 EP90117799A EP90117799A EP0423492A2 EP 0423492 A2 EP0423492 A2 EP 0423492A2 EP 90117799 A EP90117799 A EP 90117799A EP 90117799 A EP90117799 A EP 90117799A EP 0423492 A2 EP0423492 A2 EP 0423492A2
Authority
EP
European Patent Office
Prior art keywords
squeegee
ribs
width
trailing edge
paper
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
EP90117799A
Other languages
German (de)
English (en)
Other versions
EP0423492B1 (fr
EP0423492A3 (en
Inventor
Rudolf Beisswanger
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT90117799T priority Critical patent/ATE98528T1/de
Publication of EP0423492A2 publication Critical patent/EP0423492A2/fr
Publication of EP0423492A3 publication Critical patent/EP0423492A3/de
Application granted granted Critical
Publication of EP0423492B1 publication Critical patent/EP0423492B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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 invention relates to a doctor blade according to the preamble of claim 1.
  • a doctor blade is known from US Pat. No. 4,279,949.
  • a strip-shaped doctor body is provided, which is pivotally mounted around the contact pressure of its sharp wiping edge at the end of the doctor body to be able to adjust.
  • This doctor blade body can be provided with a wear-resistant surface, in particular made of carbide material.
  • squeegees with an irregular cross-section in cross section perpendicular to the longitudinal extent of the squeegee strip and an arcuate squeegee surface are known from EP-A 0109520 and DE-OS 36 20 374.
  • either the squeegee surface or the entire squeegee strip should consist of ceramic, in particular oxide-ceramic material, because the latter is particularly wear-resistant.
  • the squeegee devices known from the first two publications were based on the idea that a uniform, abrupt trailing edge at the end of the squeegee surface of the squeegee bar could ensure the uniformity of the coating application even with changing contact pressures.
  • the doctor surface was very smooth.
  • the object of the invention is to make it possible in the known devices mentioned at the outset, by means of a specific groove shape, to achieve a good metering possibility with extremely even stroke application, even with squeegee strips with an irregular cross section.
  • the squeegee 1 As is customary in doctor squeegee rods guided in squeegee beds, is carried by a retaining blade or retaining leaf spring 2. It can be pressed against the counter-roller C and thus against the paper or cardboard web guided by a pressure bar or other pressure means, which act on the squeegee bar or the leaf spring in this specified area.
  • the radius of the counter roll C is indicated by R w and the radius of curvature of the arcuate doctor surface by R.
  • the squeegee surface consists of nothing but side by side arranged grooves 3, between which there are ribs 4. In this case, the ribs end in a flat roof surface 5 of width b.
  • these ribs narrow towards the trailing edge 7 of the squeegee strip 1, where their expansion is zero, ie they disappear.
  • a rounding radius R2 is provided for this. It can be seen from FIG. 1 that the grooves 3 flatten out towards the trailing edge, specifically a value between 10 and 25% of the normal height of the ribs 4 being provided for this.
  • For the rounding radius R1 applies approximately that it is between 3 and 30 mm, and it can generally R1 between 10 and 35% of the rounding radius R of the squeegee surface or between 5 and 30% of the diameter of the counter-roller after the point of their closest distance to the paper web or whose guide element is C.
  • the absolute values for the rib height a are 0.3 to 3 mm and for the rib width b 0.4 to 8 mm; A technology is to be aimed at that allows lower limit values of 0.1 mm. The same dimension ranges also apply to the corresponding groove width c.
  • the radius R of the doctor surface is at least 0.02 times, preferably between 0.1 and 0.2 times the radius R w of the counter roll C guiding the paper or cardboard web.
  • the trailing edge 7 of the doctor blade is located at a distance between 0 and 10 mm, preferably 0 and 6 mm, from the closest point of the doctor blade surface with respect to the paper web or the guide element C supporting it.
  • the selected shape of the groove ensures that a uniform line application is produced across the paper, that is, seen along the web width.
  • the ribs 3 end at the point of contact or the point of closest distance to the counter-roller C.
  • the grooves 3 at the end that is to say in the region of the run-off edge 7 ', are substantially widened and the coating is smoothed evenly by the run-off edge 7'.
  • the radius of curvature R1 continues, with which the grooves flatten from their base towards the trailing edge 7 'to the latter.
  • the squeegee 1 ⁇ is guided in the groove 13 of a compact squeegee holder 11.
  • a pressure hose 12 is provided for pressing the squeegee against the counter roll C.
  • a squeegee with a grooved surface is a metering coating element with which a relatively precisely metered amount can be applied to the paper web. Due to the protrusion, by pivoting the curved squeegee surface formed by the ribs and grooves, the wear of the ribs, which cannot be completely avoided even in the case of ceramic-coated grooves, can be somewhat compensated for. This compensation option is reinforced by the rounding radius R1.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Cartons (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Magnetic Heads (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Inorganic Insulating Materials (AREA)
  • Lubricants (AREA)
  • Wrappers (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
EP90117799A 1989-10-14 1990-09-15 Installation pour doser le couchage des bandes de papier ou de carton Expired - Lifetime EP0423492B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90117799T ATE98528T1 (de) 1989-10-14 1990-09-15 Dosiereinrichtung zum dosieren von beschichtungen von papier- oder kartonbahnen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3934418A DE3934418A1 (de) 1989-10-14 1989-10-14 Rakel
DE3934418 1989-10-14

Publications (3)

Publication Number Publication Date
EP0423492A2 true EP0423492A2 (fr) 1991-04-24
EP0423492A3 EP0423492A3 (en) 1991-10-23
EP0423492B1 EP0423492B1 (fr) 1993-12-15

Family

ID=6391527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90117799A Expired - Lifetime EP0423492B1 (fr) 1989-10-14 1990-09-15 Installation pour doser le couchage des bandes de papier ou de carton

Country Status (9)

Country Link
US (1) US5119755A (fr)
EP (1) EP0423492B1 (fr)
JP (1) JPH03165868A (fr)
AT (1) ATE98528T1 (fr)
BR (1) BR9005306A (fr)
DE (1) DE3934418A1 (fr)
ES (1) ES2047224T3 (fr)
FI (1) FI95942C (fr)
NO (1) NO175707C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0556551A1 (fr) * 1992-02-21 1993-08-25 J.M. Voith GmbH Dispositif à rouleaux pour l'application d'une couleur d'enduction sur une bande de papier

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632814A (en) * 1992-02-27 1997-05-27 Jagenberg Aktiengesellschaft Device for applying a coating material to a running web
JP2622054B2 (ja) * 1992-08-07 1997-06-18 ノムラテクノリサーチ株式会社 コーターブレード及びその製造方法
DE4302435A1 (en) * 1993-01-29 1993-08-12 Voith Gmbh J M Paper web coating appts. - has smoother against side of web in free path after leaving gap between applicator rollers
DE4334555C2 (de) * 1993-10-11 2003-06-26 Jagenberg Papiertech Gmbh Halterung für eine Rakelstange
DE4402226C2 (de) * 1994-01-27 1997-11-06 Voith Gmbh J M Rakelvorrichtung
US5713276A (en) * 1995-09-22 1998-02-03 Motorola, Inc. Flexible self-level squeegee blade
JP3315595B2 (ja) * 1996-06-10 2002-08-19 キヤノン株式会社 現像剤規制部材および現像装置
JP3443519B2 (ja) * 1996-09-30 2003-09-02 京セラ株式会社 ブレード
DE29617230U1 (de) * 1996-10-04 1996-12-05 Voith Sulzer Papiermasch Gmbh Auftragseinrichtung zum Auftragen eines Streichmediums
SE507926C2 (sv) * 1996-12-19 1998-07-27 Btg Kaelle Inventing Ab Bestrykningsblad för beläggning av en löpande bana
SE511082C2 (sv) * 1996-12-20 1999-08-02 Btg Eclepens Sa Beläggningsblad
US5846325A (en) * 1997-02-25 1998-12-08 The Mead Corporation Coating blade and method of using the same
DE102005029613A1 (de) * 2005-06-23 2007-01-04 Voith Patent Gmbh Vorrichtung zur Dosierung und/oder Egalisierung
US8474378B1 (en) * 2010-02-23 2013-07-02 Valley Holdings, Llc Chamber blade/sealing assembly for a printing press

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718117A (en) * 1971-04-26 1973-02-27 Armstrong Cork Co Grooved rod coater
EP0109520A1 (fr) * 1982-11-23 1984-05-30 JAGENBERG Aktiengesellschaft Dispositif pour l'enduction d'une bande de matériau mobile
DE3605409A1 (de) * 1986-02-20 1987-08-27 Voith Gmbh J M Einrichtung zur beschichtung laufender warenbahnen
JPS6447469A (en) * 1987-08-17 1989-02-21 Mitsui Petrochemical Ind Method and device for applying liquid

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2017704A1 (fr) * 1970-04-14 1971-11-04
JPS6089827A (ja) * 1983-10-22 1985-05-20 Konishiroku Photo Ind Co Ltd 塗膜平担化方法及びその装置
DE8415154U1 (de) * 1984-05-18 1984-09-13 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum beschichten laufender materialbahnen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718117A (en) * 1971-04-26 1973-02-27 Armstrong Cork Co Grooved rod coater
EP0109520A1 (fr) * 1982-11-23 1984-05-30 JAGENBERG Aktiengesellschaft Dispositif pour l'enduction d'une bande de matériau mobile
DE3605409A1 (de) * 1986-02-20 1987-08-27 Voith Gmbh J M Einrichtung zur beschichtung laufender warenbahnen
JPS6447469A (en) * 1987-08-17 1989-02-21 Mitsui Petrochemical Ind Method and device for applying liquid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band. 13, Nr. 238 (C-603), 5. Juni 1989; & JP-A-01 047 469 (MITSUI PETROCHEM IND., LTD) 21-02-1989 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0556551A1 (fr) * 1992-02-21 1993-08-25 J.M. Voith GmbH Dispositif à rouleaux pour l'application d'une couleur d'enduction sur une bande de papier

Also Published As

Publication number Publication date
ATE98528T1 (de) 1994-01-15
FI904876A0 (fi) 1990-10-03
US5119755A (en) 1992-06-09
NO175707C (no) 1994-11-23
NO904399L (no) 1991-04-15
BR9005306A (pt) 1991-09-17
EP0423492B1 (fr) 1993-12-15
JPH03165868A (ja) 1991-07-17
FI95942B (fi) 1995-12-29
FI95942C (fi) 1996-04-10
NO175707B (no) 1994-08-15
NO904399D0 (no) 1990-10-11
EP0423492A3 (en) 1991-10-23
ES2047224T3 (es) 1994-02-16
DE3934418A1 (de) 1991-04-18

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