GB923390A - Improved method and apparatus for coating webs - Google Patents

Improved method and apparatus for coating webs

Info

Publication number
GB923390A
GB923390A GB1109760A GB1109760A GB923390A GB 923390 A GB923390 A GB 923390A GB 1109760 A GB1109760 A GB 1109760A GB 1109760 A GB1109760 A GB 1109760A GB 923390 A GB923390 A GB 923390A
Authority
GB
United Kingdom
Prior art keywords
web
rollers
parts
feet
minute
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
GB1109760A
Inventor
Denis Raymond Hicklin
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.)
St Annes Board Mill Co Ltd
Original Assignee
St Annes Board Mill Co Ltd
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 St Annes Board Mill Co Ltd filed Critical St Annes Board Mill Co Ltd
Priority to GB1109760A priority Critical patent/GB923390A/en
Publication of GB923390A publication Critical patent/GB923390A/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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • 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
    • D21H5/006—Controlling or regulating
    • D21H5/0062—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper
    • D21H5/0067—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper with an essentially cylindrical body, e.g. roll or rod

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A method of applying a coating to a web 23, e.g. of board material or paper, comprises restraining the coated surface to follow a curved path defined by an endless surface 2, 2A, 2B that extends longitudinally and <PICT:0923390/IV(a)/1> arcuately along the web, moves in the reverse direction thereto, and rubs the coated surface, whereby some of the coating is retained on the web and some is removed and reapplied, e.g. at points 29, 31, 34, where the web leaves the surface. The surface is formed by one or more chrome-plated rollers 2, 2A, 2B rotating anticlockwise, or by endless metal bands, vertically adjustable rollers 8 guiding the web in an arcuate path so that it laps the rollers 2, 2A, 2B. A thixotropic coating material is fed to a bath 17 and applied by rollers 16, 18 to the web 23, a spring-pressed blade 19 doctoring the roller 18, which has a roughened surface. The rollers 2, 2A, 2B preferably run at different speeds, e.g. for a web speed of 250 feet/minute, peripheral roller speeds of 50 feet/minute, 500 feet/minute, and 250 feet/minute respectively are chosen, and the arcs of contact of the web with the rollers also may differ. The web may be coated on both surfaces, the rollers 8 being then chrome-plated. A coating composition mentioned comprises (parts by weight):-90 parts clay, 10 parts titanium oxide, and 20 parts casein, with water to give 42% solids. Instead of casein, 5 parts casein plus 15 parts latex may be employed, with water to give 54% solids.
GB1109760A 1960-03-29 1960-03-29 Improved method and apparatus for coating webs Expired GB923390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1109760A GB923390A (en) 1960-03-29 1960-03-29 Improved method and apparatus for coating webs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1109760A GB923390A (en) 1960-03-29 1960-03-29 Improved method and apparatus for coating webs

Publications (1)

Publication Number Publication Date
GB923390A true GB923390A (en) 1963-04-10

Family

ID=9979982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1109760A Expired GB923390A (en) 1960-03-29 1960-03-29 Improved method and apparatus for coating webs

Country Status (1)

Country Link
GB (1) GB923390A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473955A (en) * 1967-05-05 1969-10-21 Eastman Kodak Co Coating process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473955A (en) * 1967-05-05 1969-10-21 Eastman Kodak Co Coating process

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