EP0425067B1 - Apparatus for applying a coating to a surface of a substrate - Google Patents

Apparatus for applying a coating to a surface of a substrate Download PDF

Info

Publication number
EP0425067B1
EP0425067B1 EP90304154A EP90304154A EP0425067B1 EP 0425067 B1 EP0425067 B1 EP 0425067B1 EP 90304154 A EP90304154 A EP 90304154A EP 90304154 A EP90304154 A EP 90304154A EP 0425067 B1 EP0425067 B1 EP 0425067B1
Authority
EP
European Patent Office
Prior art keywords
coating
roller
substrate
doctor
applying
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 - Lifetime
Application number
EP90304154A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0425067A2 (en
EP0425067A3 (en
Inventor
Kazuhiro C/O Pioneer Video Corporation Shibamoto
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.)
Pioneer Video Corp
Pioneer Corp
Original Assignee
Pioneer Video Corp
Pioneer Electronic Corp
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 Pioneer Video Corp, Pioneer Electronic Corp filed Critical Pioneer Video Corp
Publication of EP0425067A2 publication Critical patent/EP0425067A2/en
Publication of EP0425067A3 publication Critical patent/EP0425067A3/en
Application granted granted Critical
Publication of EP0425067B1 publication Critical patent/EP0425067B1/en
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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0817—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
    • 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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls

Definitions

  • This invention relates to an apparatus for applying a coating to a surface of a substrate at a constant coating thickness.
  • a conventional roll coater is shown in Fig. 3.
  • the conventional apparatus includes a lower roller 1, and an associated upper roller 3 which are rotated while clamping therebetween a substrate 2 to be coated.
  • a coating 5 is supplied to a surface of the upper roller 3 from a feeder 4 for applying the coating 5 to the upper roller 3, and the coating 5 applied by the feeder 4 is coated on the surface of the upper roller 3 at a uniform thickness to form a coating layer 7 by using a doctor 6.
  • the upper roller 3 rotates on the substrate 2 with the coating layer 7 being applied onto the surface of the substrate 2.
  • the coating 5 applied on the surface of the upper roller 3 by the feeder 4 is likely to be piled, because the coating 5 applied by the feeder 4 spreads onto a flank or escape surface, i.e., the surface opposite to a rake surface 6a of a doctor 6. Therefore, the coating accumulated on the flank surface of the doctor 6 will drop onto the surface of the substrate 2 so that the coating dropped onto the substrate is adhered thereto in the form of an undesired protrusion.
  • Unexamined Japanese Utility Model Publiction No. 60-39370 discloses an apparatus for applying a coating to a surface of a substrate comprising means for feeding the coating to a predetermined position; a roller means for applying the coating onto the surface of the substrate; and, a doctor means located in a region of the roller wherein the coating is moved downwardly for regulating the thickness of the coating applied to the roller means, the doctor means having a rake surface and a facing surface; and according to the present invention such an apparatus is characterised by the doctor means further having a flank surface forming an escape angle defined between a tangential plane with which the roller means is contacted and an extension plane of the flank surface at an intersection defined between the extension plane and the roller means, the escape angle being an obtuse angle.
  • roller coater according to this invention is composed of substantially the same components as those shown in Fig. 3 except for the parts described hereinbelow. Accordingly the duplicated description therefore will be omitted.
  • the like members and components are designated by the same reference characters.
  • a doctor 10 for regulating a coating 5 continuously applied to a surface of an upper roller 3 by a feeder 4 for applying the coating 5 to the surface of the upper roller 4 as a coating layer 7 at a constant thickness has a sharp knife edge portion 10a with a flank or escape surface 10b and a facing surface 10c.
  • the facing surface 10c of the edge portion 10a is confronted with the surface of upper roller 3, and is extended toward the upper roller 3 along the circumference of the upper roller 3.
  • the flank surface 10b is placed in the opposite side to the facing surface 10c.
  • the facing surface 10c confronted with the surface of the upper roller 3 forms an angle ⁇ 1 of approximately 60 degree with the flank surface 10b.
  • an "escape angle" of ⁇ 2 formed by the flank surface 10b with the surface of the upper roller 3, i.e., an angle defined between a tangential plane 13 with which the upper roller 3 is contacted and an extension plane 11 of the flank surface 10b at an intersection 12 defined between the extension plane 11 and the upper roller surface is an obtuse angle at about 120 degrees.
  • the coating 5 may include a hot melt adhesive or the like.
  • the substrate 2 may include a disc-like member made of transparent resinous material.
  • the hot melt adhesive is applied to one surface of the substrate. Thereafter, the substrate having the adhesive is bonded with one having the same shape (not shown). These steps are suitable for producing an optical video disc.
  • the roll coater according to the present invention is suitable for applying onto disc substrates a hot melt adhesive as a protective layer or a bonding adhesive for the optical disc as shown in, for example, the Japanese Patent Unexamined Publication No. Sho. 58-6536.
  • the coating supplied from the feeder is formed into a coating layer at a uniform thickness, because the escape angle formed by the contact portion of the doctor 10 relative to the upper roller 3 is an obtuse angle, so that the coating supplied from the feeder will not escape to the flank surface side of the doctor. As a result, all the coating is coated on the surface of the roller. Therefore, the coating is prevented from dropping onto the surface of the substrate.

Landscapes

  • Coating Apparatus (AREA)
EP90304154A 1989-10-24 1990-04-18 Apparatus for applying a coating to a surface of a substrate Expired - Lifetime EP0425067B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12447989U JPH0361959U (US07579456-20090825-P00002.png) 1989-10-24 1989-10-24
JP124479/89 1989-10-24

Publications (3)

Publication Number Publication Date
EP0425067A2 EP0425067A2 (en) 1991-05-02
EP0425067A3 EP0425067A3 (en) 1991-10-30
EP0425067B1 true EP0425067B1 (en) 1993-10-20

Family

ID=14886540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90304154A Expired - Lifetime EP0425067B1 (en) 1989-10-24 1990-04-18 Apparatus for applying a coating to a surface of a substrate

Country Status (3)

Country Link
EP (1) EP0425067B1 (US07579456-20090825-P00002.png)
JP (1) JPH0361959U (US07579456-20090825-P00002.png)
DE (1) DE69004048T2 (US07579456-20090825-P00002.png)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2533313A (en) * 2014-12-15 2016-06-22 Airbus Operations Ltd Flowable material applicator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039370U (ja) * 1983-08-23 1985-03-19 パイオニア株式会社 ロ−ルコ−タ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6049963B2 (ja) * 1977-08-22 1985-11-06 三菱電機株式会社 信号記録装置
JPS586536A (ja) * 1981-07-01 1983-01-14 Pioneer Electronic Corp 光学式デイスク
DE8415154U1 (de) * 1984-05-18 1984-09-13 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum beschichten laufender materialbahnen
JPS6242759A (ja) * 1985-08-19 1987-02-24 Hirano Kinzoku Kk 被膜塗工装置
ATE85904T1 (de) * 1987-10-10 1993-03-15 Johannes Zimmer Auftragungsvorrichtung.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039370U (ja) * 1983-08-23 1985-03-19 パイオニア株式会社 ロ−ルコ−タ

Also Published As

Publication number Publication date
JPH0361959U (US07579456-20090825-P00002.png) 1991-06-18
DE69004048T2 (de) 1994-05-05
EP0425067A2 (en) 1991-05-02
DE69004048D1 (de) 1993-11-25
EP0425067A3 (en) 1991-10-30

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