GB923390A - Improved method and apparatus for coating webs - Google Patents
Improved method and apparatus for coating websInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3473955A (en) * | 1967-05-05 | 1969-10-21 | Eastman Kodak Co | Coating process |
-
1960
- 1960-03-29 GB GB1109760A patent/GB923390A/en not_active Expired
Cited By (1)
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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