GB1362320A - Apparatus for detecting apertures in a web of material - Google Patents

Apparatus for detecting apertures in a web of material

Info

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
Application number
GB5314272A
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.)
LIPPKE H
Original Assignee
LIPPKE H
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 LIPPKE H filed Critical LIPPKE H
Publication of GB1362320A publication Critical patent/GB1362320A/en
Expired legal-status Critical Current

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.
GB5314272A 1971-11-18 1972-11-17 Apparatus for detecting apertures in a web of material Expired GB1362320A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee