GB1282044A - Coating web material - Google Patents

Coating web material

Info

Publication number
GB1282044A
GB1282044A GB3838069A GB3838069A GB1282044A GB 1282044 A GB1282044 A GB 1282044A GB 3838069 A GB3838069 A GB 3838069A GB 3838069 A GB3838069 A GB 3838069A GB 1282044 A GB1282044 A GB 1282044A
Authority
GB
United Kingdom
Prior art keywords
web
hopper
suction
trough
liquid
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
Application number
GB3838069A
Inventor
Martin George Bird
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 GB1282044A publication Critical patent/GB1282044A/en
Expired 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
    • D21H23/30—Pretreatment of the paper
    • 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
    • B05C9/02—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 liquid or other fluent material to surfaces by single means not covered by groups B05C1/00 - B05C7/00, whether or not also using other means
    • 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/0007—Pretreatment of paper to which liquids or other fluent materials are to be applied
    • 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

Landscapes

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

Abstract

1282044 Coating webs EASTMAN KODAK CO 31 July 1969 [31 July 1968] 38380/69 Heading D1L A moving web of material W supported on a backing roller 10 is continuously coated with liquid from a hopper 12, and the stream of liquid 18 bridging the gap between the hopper and the web is stabilised by reducing the air pressure on the side of the stream 18 which the web approaches by means of a suction trough 20 adjacent the hopper and open towards the web, and further by removing the boundary layer of air carried by the moving web by means of a suction knife 30 comprising a slot 31 connected to a suction source separate from that of the trough 20, which slot 31 is located within, or at the entrance 24 of, the suction trough and is closely spaced from the web and extends across the full width of the hopper 12. Pressure reduction in the suction trough may be 0.1-5.0 in. of water, and in the suction knife 17-22 in. of water. The slot 31 may be up to 0.05 in. wide, and spaced 0.02-0.03 in from the web. Application of the coating liquid may be by flow of the liquid down the hopper surface, as shown, or by means of an extrusion hopper (Fig. 2, not shown). The suction knife permits increased coating speeds; in Examples paper is coated with a silver halide dispersion.
GB3838069A 1968-07-31 1969-07-31 Coating web material Expired GB1282044A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74910968A 1968-07-31 1968-07-31

Publications (1)

Publication Number Publication Date
GB1282044A true GB1282044A (en) 1972-07-19

Family

ID=25012298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3838069A Expired GB1282044A (en) 1968-07-31 1969-07-31 Coating web material

Country Status (4)

Country Link
BE (1) BE727407A (en)
DE (1) DE6930188U (en)
FR (1) FR2000001A1 (en)
GB (1) GB1282044A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378914A2 (en) * 1989-01-19 1990-07-25 Oji Paper Co. Ltd. Process for the preparation of support sheet for photographic printing paper
WO2002081102A1 (en) * 2001-04-09 2002-10-17 Bachofen + Meier Ag Device for suctioning an air boundary layer from a running web of material

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE412862C (en) * 1977-02-14 1982-01-25 Billeruds Ab DEVICE COVERING A CURRENT COAT
DE3014816C2 (en) * 1980-04-17 1984-01-05 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Device for basting webs with viscous casting solutions
FR2540406B1 (en) * 1983-02-04 1986-10-31 Centre Tech Ind Papier DEVICE FOR COATING A SHEET OR A CONTINUOUSLY MOVING STRIP
DE3309345C2 (en) * 1983-03-16 1985-04-04 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Device for applying at least one casting layer
DE3309343C2 (en) * 1983-03-16 1986-08-14 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Device for applying at least one casting layer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378914A2 (en) * 1989-01-19 1990-07-25 Oji Paper Co. Ltd. Process for the preparation of support sheet for photographic printing paper
EP0378914A3 (en) * 1989-01-19 1990-10-24 Oji Paper Co. Ltd. Process for the preparation of support sheet for photographic printing paper
WO2002081102A1 (en) * 2001-04-09 2002-10-17 Bachofen + Meier Ag Device for suctioning an air boundary layer from a running web of material

Also Published As

Publication number Publication date
DE6930188U (en) 1969-11-27
BE727407A (en) 1969-07-01
FR2000001A1 (en) 1969-08-29

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees