EP0427753B1 - Appareil de couchage avec ecran - Google Patents

Appareil de couchage avec ecran Download PDF

Info

Publication number
EP0427753B1
EP0427753B1 EP89908565A EP89908565A EP0427753B1 EP 0427753 B1 EP0427753 B1 EP 0427753B1 EP 89908565 A EP89908565 A EP 89908565A EP 89908565 A EP89908565 A EP 89908565A EP 0427753 B1 EP0427753 B1 EP 0427753B1
Authority
EP
European Patent Office
Prior art keywords
coating
shield
web
slide
hopper
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
EP89908565A
Other languages
German (de)
English (en)
Other versions
EP0427753A1 (fr
Inventor
Kenneth J. Ruschak
Pablo Santiago
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0427753A1 publication Critical patent/EP0427753A1/fr
Application granted granted Critical
Publication of EP0427753B1 publication Critical patent/EP0427753B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters
    • 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
    • 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
    • G03C2001/7433—Curtain coating
    • 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
    • G03C2001/7485—Shielding means against air disturbances

Definitions

  • This invention relates to apparatus for coating a web or sheet with a fluid composition as a step in the production of photographic material.
  • Slide hoppers are employed in both single and multiple-layer bead and curtain coating operations to supply coating composition to the coating zone.
  • Such hoppers comprise one or more slide surfaces, over which one or more layers of coating composition flow to the coating zone. Defects occur when the coating composition flowing over the slide surfaces is exposed to air currents. The air currents impacting on the flowing composition cause disturbances of the surface of the composition which result in non-uniformities in the coating composition as it moves down the slide surface to the coating zone. These non-informities in the composition on the slide surface result in the formation of mottle or other defects in the coating on the web or sheet.
  • the foraminous enclosure is designed to enclose the entire slide hopper and the coating zone, and is not closely spaced to the slide surface of the hopper. Indeed, in U.S. Patent No. 4,287,240 it is stated that the enclosure should be spaced in the range of about 5 to about 60 cms from the coating composition. Optimum results have been achieved with enclosures formed of a plurality of spaced wall members, each of which is composed of a foraminous material. The best enclosures reduce peak velocities of air flow to approximately 7,6 m (25 feet) per minute. However, even such velocities have been shown to cause disturbances in the coating compositions on the slide which often appear as broad longitudinal streaks in the resulting coating. In most products these streaks are objectionable.
  • a triple slide hopper 25 which forms a three layer falling curtain 26 of coating compositions which impinges on the web 18′ as it passes around support roller 16′ to deposit on web 18′ a coating composed of three distinct superimposed layers.
  • the coating compositions are fed to the slide surfaces through slots 15a′, 15b′, and 15c′.
  • the layers of coating compositions flow down slide surfaces 11′, 12′, and 13′ by gravity to the edge of the hopper where a free falling curtain 26 is formed.
  • the falling curtain 26 impinges on the web and deposits thereon a composite coating of three distinct layers of coating composition.
  • the shield structure 24 is shaped so that it remains closely spaced and essentially parallel to the slide surfaces including the lower slide surface 27 which is contiguous with the surface 13′ and is approximately vertical for supplying coating composition to the vertical free falling curtain.
  • the thickness of the hollow shield structure can be, for example, approximately 2.5 centimeters. It is hollow and has ports 24a and 24b for flow of heating fluid.
  • the design of the shield depends on the material of construction for the shield and its capability of transmitting heat, as well as the thermal transfer coefficient of the heating fluid within the hollow structure.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'appareil de couchage décrit sert à appliquer un revêtement d'une ou plusieurs couches d'une composition de couchage sur la surface d'une bande continue ou sur des sections distinctes d'un matériau en feuille. L'appareil comprend une trémie à glissement en cascade servant à acheminer la composition de couchage vers la zone de couchage. La couche ou les couches de la composition de couchage s'écoulant le long des surfaces de glissement de la trémie à glissement en cascade sont protégées des effets néfastes des courants d'air de convection par un écran, lequel est placé assez près des surfaces de glissement de la trémie à glissement en cascade pour empêcher la création de courants de transfert thermique. L'écran est de préférence chauffé à une température égale ou supérieure à la température des compositions de couchage, de façon à empêcher toute condensation.

Claims (6)

  1. Dispositif pour appliquer sur une bande ou une feuille une composition de couchage dans la fabrication de matériau photographique, comprenant :
    a. un moyen pour guider la bande ou feuille le long d'un trajet prédéterminé à travers une zone de couchage, et
    b. une trémie à plan d'écoulement comportant une surface d'écoulement pour former un écoulement de composition de couchage devant être appliquée à la bande ou feuille,
    c. un écran disposé à proximité immédiate de ladite surface d'écoulement d'où il résulte, en utilisation, que l'écran est en permanence hors de contact avec la composition qui s'écoule mais est si peu espacé de celle-ci qu'il empêche la création de courants de convection par un différentiel de température entre la composition et l'atmosphère en contact avec la composition,
       caractérisé par un moyen pour chauffer ledit écran à une température au moins égale à celle de la composition de couchage.
  2. Dispositif selon la revendication 1, dans lequel ledit moyen pour chauffer ledit écran comprend des moyens de passage à l'intérieur dudit écran, pour une circulation de fluide chauffé.
  3. Dispositif selon la revendication 1, dans lequel ledit moyen chauffant comprend une couverture chauffante alimentée électriquement en contact thermique avec ledit écran.
  4. Dispositif selon la revendication 1, 2 ou 3, dans lequel ledit écran est espacé de ladite surface de trémie d'environ 0,6 cm.
  5. Dispositif selon l'une quelconque des revendications 1 à 4, dans lequel ledit moyen pour guider une bande ou feuille est adapté pour guider une bande, et ladite trémie à plan d'écoulement est disposée à proximité dudit moyen pour guider une bande et est adaptée pour coucher par le procédé de couchage au ménisque.
  6. Dispositif selon l'une quelconque des revendications 1 à 4, dans lequel ladite trémie à plan d'écoulement est disposée au-dessus dudit moyen pour guider ladite bande ou feuille et en relation espacée avec celui-ci, et est adaptée pour coucher par le procédé de couchage au rideau.
EP89908565A 1988-07-28 1989-07-19 Appareil de couchage avec ecran Expired - Lifetime EP0427753B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US22540188A 1988-07-28 1988-07-28
US225401 1988-07-28
PCT/US1989/003082 WO1990001178A1 (fr) 1988-07-28 1989-07-19 Appareil de couchage avec ecran

Publications (2)

Publication Number Publication Date
EP0427753A1 EP0427753A1 (fr) 1991-05-22
EP0427753B1 true EP0427753B1 (fr) 1995-09-20

Family

ID=22844719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89908565A Expired - Lifetime EP0427753B1 (fr) 1988-07-28 1989-07-19 Appareil de couchage avec ecran

Country Status (4)

Country Link
EP (1) EP0427753B1 (fr)
JP (1) JPH0627929B2 (fr)
DE (1) DE68924349T2 (fr)
WO (1) WO1990001178A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5114759A (en) * 1990-07-30 1992-05-19 Eastman Kodak Company Apparatus and method for curtain coating
WO1992002851A2 (fr) * 1990-07-30 1992-02-20 Eastman Kodak Company Procede et appareil pour le couchage par voile
DE69026097T2 (de) * 1990-12-12 1996-10-02 Agfa Gevaert Nv Vorhangbeschichter
RU2083283C1 (ru) * 1991-12-21 1997-07-10 Эмитек Гезельшафт Фюр Эмиссионстехнологи Мбх Ячеистый корпус и способ изготовления электрически подогреваемого ячеистого корпуса
US6117237A (en) 1994-01-04 2000-09-12 3M Innovative Properties Company Coater die enclosure system
US5725665A (en) * 1996-05-01 1998-03-10 Minnesota Mining And Manufacturing Company Coater enclosure and coating assembly including coater enclosure
US7329437B2 (en) 2001-08-17 2008-02-12 Fujifilm Corporation Coating method and coating apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5575758A (en) * 1978-12-06 1980-06-07 Fuji Photo Film Co Ltd Coating method and apparatus therefor
JPS56133067A (en) * 1980-03-24 1981-10-17 Fuji Photo Film Co Ltd Coating apparatus
US4287240A (en) * 1980-04-11 1981-09-01 Eastman Kodak Company Coating apparatus provided with a protective shield

Also Published As

Publication number Publication date
DE68924349D1 (de) 1995-10-26
JPH03503576A (ja) 1991-08-08
DE68924349T2 (de) 1996-05-09
WO1990001178A1 (fr) 1990-02-08
JPH0627929B2 (ja) 1994-04-13
EP0427753A1 (fr) 1991-05-22

Similar Documents

Publication Publication Date Title
FI59980B (fi) Foerfarande och apparat foer belaeggning av planglas
US4287240A (en) Coating apparatus provided with a protective shield
US4135477A (en) Curtain coating apparatus
US4455327A (en) Dual surface film coating of running web
EP0427753B1 (fr) Appareil de couchage avec ecran
WO1982003450A1 (fr) Procede et appareil de sechage d'un materiau en feuille revetu
US6018886A (en) Effect of air baffle design on mottle in solvent coatings
US3973062A (en) Coating device
US4348432A (en) Method for coating with radially-propagating, free, liquid sheets
KR100531706B1 (ko) 다이 에지 세척 시스템
CA1244641A (fr) Dispositif de deposition continue sous vide, et ses tableaux de commande-regulation de l'ampleur du debit de vapeur
US3404025A (en) Method and apparatus for coating a sheet or web
EP0045014B1 (fr) Appareil pour le durcissement par irradiation électronique de bandes pourvues d'un revêtement de résine
US5114759A (en) Apparatus and method for curtain coating
WO1990001179A1 (fr) Procede et appareil de couchage par projection
US5855238A (en) Process and device for the continuous production of sheet metal strips
EP0969314B1 (fr) Procédé de revêtement au rideau
US3802911A (en) Method for controlling the coating thickness of a coated metal strip
EP0540728B1 (fr) Appareil et procede de revetement d'une bande continue
EP0585370B1 (fr) Methode et appareil de fabrication de matieres photographiques enduites
US3877418A (en) Apparatus and method for coating metallic strips
US3579735A (en) Apparatus for balancing pressure applied to film-forming material in the deposition thereof onto a casting surface
SE454270B (sv) Sett och anordning for att bilda en beleggning av stelnat lod pa en metalliserad kant av en glasskiva
JPH0533112A (ja) 合金化溶融亜鉛めつき鋼板の製造方法及び装置
FI71691C (fi) Foerfarande foer att binda ett tunt plastskikt vid ett underlag.

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901222

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB IT LI NL

17Q First examination report despatched

Effective date: 19931129

RBV Designated contracting states (corrected)

Designated state(s): BE DE FR GB NL

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB NL

REF Corresponds to:

Ref document number: 68924349

Country of ref document: DE

Date of ref document: 19951026

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010614

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010702

Year of fee payment: 13

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020719

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020719

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20050616

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20050728

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050729

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070201

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20070201

BERE Be: lapsed

Owner name: *EASTMAN KODAK CY

Effective date: 20060731