GB1129536A - Improvements in methods of and apparatus for measuring the cloudiness of travelling paper webs - Google Patents
Improvements in methods of and apparatus for measuring the cloudiness of travelling paper websInfo
- Publication number
- GB1129536A GB1129536A GB2706966A GB2706966A GB1129536A GB 1129536 A GB1129536 A GB 1129536A GB 2706966 A GB2706966 A GB 2706966A GB 2706966 A GB2706966 A GB 2706966A GB 1129536 A GB1129536 A GB 1129536A
- Authority
- GB
- United Kingdom
- Prior art keywords
- meter
- cloudiness
- web
- paper
- component
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/86—Investigating moving sheets
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Paper (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1,129,536. Photo-electric measurement of paper web formation. VALMET OY. June 17, 1966 [Oct. 19, 1965], No.27069/66. Heading G1A. The "cloudiness" (sheet formation variations) of a travelling paper web is measured by detecting light transmitted through the web to produce a signal having D.C. and A. C. components, the ratio between which is indicative of the cloudiness of the sheet. In one arrangement, Fig. 1, light from a source 2 is transmitted by the web to the detector, a photo-multiplier 4. The D.C. component is measured by a milliammeter 5 and the A. C. component by an A. C. meter 7 across the fixed resistor 6. The quotient of the components in percentages is read on a meter 8. In a second arrangement, Fig. 2 (not shown), the meter 5 of Fig. 1 is replaced by a device (9) which controls an aperture stop (3) located in front of the detector (4) the D. C. component being maintained constant thereby. In this case, the cloudiness of the sheet formation is measured direct from the meter(7), meter 8 being omitted. The ratio measured is U m /#U where U m denotes the root mean square of the instantaneous value of intensity transmitted by the web, above or below the average transparency of the paper U (the D. C. component). The sensitivity of the apparatus is adjustable to deal with different grades of paper. By frequency analysis of the detector output, floc size distribution of the paper may be investigated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI247665 | 1965-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1129536A true GB1129536A (en) | 1968-10-09 |
Family
ID=8507161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2706966A Expired GB1129536A (en) | 1965-10-19 | 1966-06-17 | Improvements in methods of and apparatus for measuring the cloudiness of travelling paper webs |
Country Status (4)
| Country | Link |
|---|---|
| FR (1) | FR1501762A (en) |
| GB (1) | GB1129536A (en) |
| NO (1) | NO118943B (en) |
| SE (1) | SE326578B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2182432A (en) * | 1985-10-30 | 1987-05-13 | Edmund Miles Rank | Improvements in and relating to apparatus for detecting particles in suspension |
| ES2184646A1 (en) * | 2001-09-21 | 2003-04-01 | Fab Nac Moneda Y Timbre Es | Procedure for analysing the visible clouding of safety paper and device for the performance thereof |
-
1966
- 1966-06-14 NO NO16343666A patent/NO118943B/no unknown
- 1966-06-17 GB GB2706966A patent/GB1129536A/en not_active Expired
- 1966-06-22 FR FR66149A patent/FR1501762A/en not_active Expired
- 1966-06-29 SE SE08821/66A patent/SE326578B/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2182432A (en) * | 1985-10-30 | 1987-05-13 | Edmund Miles Rank | Improvements in and relating to apparatus for detecting particles in suspension |
| GB2182432B (en) * | 1985-10-30 | 1989-10-25 | Edmund Miles Rank | Improvements in and relating to apparatus for detecting particles in suspension |
| ES2184646A1 (en) * | 2001-09-21 | 2003-04-01 | Fab Nac Moneda Y Timbre Es | Procedure for analysing the visible clouding of safety paper and device for the performance thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| SE326578B (en) | 1970-07-27 |
| FR1501762A (en) | 1967-11-18 |
| NO118943B (en) | 1970-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3498719A (en) | Photoelectric consistency indicator for pulp | |
| SE7806922L (en) | PROCEDURE AND DEVICE FOR INDICATING THE SIZE DISTRIBUTION OF PARTICLES EXISTING IN A FLOWING MEDIUM | |
| US3228282A (en) | Apparatus for measuring and recording basis weight of paper and the like | |
| GB1430426A (en) | Apparatus and methods for measuring the distance between reflective surfaces eg of transparent material | |
| US4402604A (en) | Method for the on-line measurement of inclusions in pulp | |
| GB1525624A (en) | Apparatus for measuring the concentration of suspended substances in a flowing liquid | |
| US4760271A (en) | Apparatus and process for measuring formation and roughness of a paper web | |
| GB1341135A (en) | Apparatus for inspecting filamentary material | |
| US3437823A (en) | Method and apparatus for detecting a given pattern in a moving web such as wire mark in paper | |
| US3724952A (en) | Method for polarimetric analysis | |
| GB1145657A (en) | A method and apparatus for detecting the concentration of particles in a gaseous atmosphere | |
| GB1129536A (en) | Improvements in methods of and apparatus for measuring the cloudiness of travelling paper webs | |
| WO1986002162A1 (en) | Concentration meter | |
| US2490011A (en) | Ultraviolet ray intensity meter | |
| US3427110A (en) | Method for inspecting objects having parallel faces | |
| GB1177058A (en) | Improvements in Methods of and Apparatus for Obtaining Indications or Measurements of Variations or Non-Uniformity in the Formation of Travelling Paper Webs | |
| US2411092A (en) | Photoelectric turbidimeter | |
| US3790796A (en) | Method and apparatus for measurement of sheet opacity | |
| US3450886A (en) | Apparatus and method for measuring the concentration of a suspension including compensating for color by using the measurement of scattered light to electronically influence the value of direct light measured | |
| GB1250605A (en) | ||
| GB2087071A (en) | Inspection system for the on-line measurement of dirt in pulp | |
| US4240752A (en) | Process and apparatus for recognizing cloud disturbances in a sample solution which is being subjected to absorption photometry | |
| JPS5796203A (en) | Contactless displacement detector employing optical fiber | |
| GB1118349A (en) | Method and apparatus for measuring the concentration of radiation absorbing material | |
| SU458742A1 (en) | Device for controlling the printed smoothness of the paper web |