GB1362320A - Apparatus for detecting apertures in a web of material - Google Patents
Apparatus for detecting apertures in a web of materialInfo
- Publication number
- GB1362320A GB1362320A GB5314272A GB5314272A GB1362320A GB 1362320 A GB1362320 A GB 1362320A GB 5314272 A GB5314272 A GB 5314272A GB 5314272 A GB5314272 A GB 5314272A GB 1362320 A GB1362320 A GB 1362320A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detectors
- web
- photo
- holes
- nov
- 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
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
-
- 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
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/894—Pinholes
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- 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)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
1362320 Photo-electrically detecting holes in webs H LIPPKE 17 Nov 1972 [18 Nov 1971] 53142/72 Heading G1A Holes in a web of material, e.g. paper, are detected by photo-electric apparatus comprising a substantially linear elongate light source (which may comprise a plurality of aligned sources), on one side of the material, and, on the other side, two rows of detectors, the axes of the rows and the light source being parallel and situated at an angle, e.g. at right angles, to the direction of movement of the web. The photo-detectors are connected in pairs, one detector from each row, such that an indicator device responds to the difference in the outputs of the detectors of each pair. By using elongated filament lamps having clear glass envelopes, the lamps and detectors may be spaced relatively far apart on either side of the web, and the holes in the web act as pinhole apertures to form an image 12 Fig. 2 of the filament in the plane of the detectors. Since such an image is incident on only one row of detectors at a time, a different output is obtained from detectors 11 than from detectors 12, Fig. 2, so that the difference signal as sensed by a differential amplifier, Fig. 4 (not shown) provides a fault output signal. The differential arrangements of photo-cells prevent ambient light variations affecting measurements, The apparatus may be shielded from external light.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2157247A DE2157247A1 (en) | 1971-11-18 | 1971-11-18 | DEVICE FOR ELECTRO-OPTICAL DETERMINATION OF HOLES IN MOVING TRAILS MADE OF PAPER AND THE LIKE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1362320A true GB1362320A (en) | 1974-08-07 |
Family
ID=5825474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5314272A Expired GB1362320A (en) | 1971-11-18 | 1972-11-17 | Apparatus for detecting apertures in a web of material |
Country Status (4)
Country | Link |
---|---|
US (1) | US3812348A (en) |
JP (1) | JPS4863779A (en) |
DE (1) | DE2157247A1 (en) |
GB (1) | GB1362320A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2169402A (en) * | 1984-12-19 | 1986-07-09 | Fenner Co Ltd J H | A method and an apparatus for detecting tears in a conveyor belt |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3906238A (en) * | 1973-05-30 | 1975-09-16 | Eigo Yagi | Size control device for continuously produced elongate object |
DE2808360C3 (en) * | 1978-02-27 | 1981-09-24 | Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch | Optical device for determining the light exit angle |
JPS55113491A (en) * | 1979-02-23 | 1980-09-02 | Paanitsuku Kk | Detector for defective seam in toe automatic sewing machine of stocking |
AT368734B (en) * | 1981-01-09 | 1982-11-10 | Tann Papier | METHOD AND DEVICE FOR REGULATING PERFORATING DEVICES BY MEANS OF ELECTRICAL SPARK ARROW FOR STRIPS MADE OF PAPER OR THE LIKE. |
JPS57151804A (en) * | 1981-03-13 | 1982-09-20 | Satake Eng Co Ltd | Detecting device for cracked grain of rice |
EP0254200A1 (en) * | 1986-07-18 | 1988-01-27 | Siemens Aktiengesellschaft | Method for detecting defective plated-through holes in printed circuit boards |
US5220178A (en) * | 1991-12-19 | 1993-06-15 | Phillips Petroleum Company | Apparatus and process for detecting the presence of defects on a moving sheet of material |
SE500882C2 (en) * | 1992-02-27 | 1994-09-26 | Rydborn S A O | Device for generating an electrical signal corresponding to movement in a certain direction of an object, for example a wire |
US5352887A (en) * | 1992-08-28 | 1994-10-04 | Motorola, Inc. | Circuit for detecting a droplet in motion and method therefor |
US5666199A (en) * | 1994-07-11 | 1997-09-09 | Phillips Petroleum Company | Apparatus and process for detecting the presence of gel defects in oriented sheets or films based on polarization detection |
US5760414A (en) * | 1995-12-19 | 1998-06-02 | Monarch Marking Systems, Inc. | Web of record members and method of and apparatus for making same and system for detecting indicia |
JP6092093B2 (en) * | 2011-12-27 | 2017-03-08 | 東レ株式会社 | Manufacturing apparatus and manufacturing method of microporous plastic film roll |
-
1971
- 1971-11-18 DE DE2157247A patent/DE2157247A1/en active Pending
-
1972
- 1972-11-16 JP JP47115169A patent/JPS4863779A/ja active Pending
- 1972-11-17 GB GB5314272A patent/GB1362320A/en not_active Expired
- 1972-11-20 US US00308013A patent/US3812348A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2169402A (en) * | 1984-12-19 | 1986-07-09 | Fenner Co Ltd J H | A method and an apparatus for detecting tears in a conveyor belt |
Also Published As
Publication number | Publication date |
---|---|
US3812348A (en) | 1974-05-21 |
DE2157247A1 (en) | 1973-05-24 |
JPS4863779A (en) | 1973-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1362320A (en) | Apparatus for detecting apertures in a web of material | |
GB1217642A (en) | Improvements in or relating to the photoelectric inspection of sheet materials | |
GB1403572A (en) | Apparatus for measuring dimensions of an object | |
GB1116009A (en) | Improvements relating to the detection of double textile threads | |
GB1485428A (en) | Fluid analysers | |
GB1223453A (en) | Apparatus for sensing the turbidity of a fluid | |
GB1421571A (en) | Apparatus for measuring the speed and direction of movement of an object | |
US3693021A (en) | Web inspection system using interlaced photocells | |
GB1362319A (en) | Apparatus and method for measuring the width of a strip | |
GB1532834A (en) | Method of and device for effecting contact-free measurement by optical scanning | |
GB1330101A (en) | Method of nondestructive measurement of the state of a surface | |
GB1079618A (en) | Arrangements for determining the structure of thin, partly transparent materials suchas textile and paper materials | |
GB1091334A (en) | Apparatus for detecting faults in webs | |
JPS5223986A (en) | Method of detecting surface flaws | |
GB746513A (en) | Gloss meter | |
GB1107822A (en) | Detecting device for use in fabric straightening apparatus | |
GB1386603A (en) | Apparatus for detecting corrugation of strip material | |
EP0093890A2 (en) | Apparatus for detecting the irregularities on the surface of a linear material | |
GB1327231A (en) | Fire detecting apparatus | |
GB1338611A (en) | Method and apparatus for detecting faults in sheet glass | |
GB1317449A (en) | Photoelectric sensing device | |
GB1164170A (en) | Improvements in or relating to Sets of Counters and Sensing Apparatus for Sensing the Counters in Said Sets | |
GB1239696A (en) | ||
GB1388108A (en) | Extensometers | |
GB1267997A (en) | Apparatus for detecting holes in a moving web or sheet |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |