JPS5624558A - Pinhole detector for can - Google Patents

Pinhole detector for can

Info

Publication number
JPS5624558A
JPS5624558A JP9934179A JP9934179A JPS5624558A JP S5624558 A JPS5624558 A JP S5624558A JP 9934179 A JP9934179 A JP 9934179A JP 9934179 A JP9934179 A JP 9934179A JP S5624558 A JPS5624558 A JP S5624558A
Authority
JP
Japan
Prior art keywords
light
sealing plate
groove
light sealing
opening end
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.)
Pending
Application number
JP9934179A
Other languages
Japanese (ja)
Inventor
Hisaichi Shibazaki
Hideo Kurashima
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP9934179A priority Critical patent/JPS5624558A/en
Publication of JPS5624558A publication Critical patent/JPS5624558A/en
Pending 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
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/909—Investigating the presence of flaws or contamination in a container or its contents in opaque containers or opaque container parts, e.g. cans, tins, caps, labels
    • 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
    • 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
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/9072—Investigating the presence of flaws or contamination in a container or its contents with illumination or detection from inside the container

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)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To improve a detection accuracy along with the maintenance of a light sealing plate and longer replacement interval by employing a light sealing plate having a groove into which the opening end of a can is inserted and made of a material larger in the hardness than the can. CONSTITUTION:In the apparatus designed to detect the light entering the inner hollow of the can passing through a pinhole thereon from a light source 18 with a photodetector, a groove 14 is formed on the light sealing plate 14 in such a manner that an opening end 10a of the can 10 is inserted thereinto. When detecting a pinhole, the opening end of the can 10 is inserted into the groove 14a until it contacts the bottom thereof. The light sealing plate 14 is made of a material having a larger hardness than the can enough to be free from wear due to the contact with the can 10, for example, carbide material and ceramic sintered material. Accordingly, the light damping by the groove 14a enables reduction of light leaking between the opening 10a and the light sealing plate 14 to a negligible level, thereby eliminating wear of the light sealing plate and assuring highly accurate detection.
JP9934179A 1979-08-03 1979-08-03 Pinhole detector for can Pending JPS5624558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9934179A JPS5624558A (en) 1979-08-03 1979-08-03 Pinhole detector for can

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9934179A JPS5624558A (en) 1979-08-03 1979-08-03 Pinhole detector for can

Publications (1)

Publication Number Publication Date
JPS5624558A true JPS5624558A (en) 1981-03-09

Family

ID=14244910

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9934179A Pending JPS5624558A (en) 1979-08-03 1979-08-03 Pinhole detector for can

Country Status (1)

Country Link
JP (1) JPS5624558A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS577545A (en) * 1980-06-18 1982-01-14 Toyo Seikan Kaisha Ltd Rotary type continuously optical inspecter for empty can
JPS5978965U (en) * 1982-11-17 1984-05-28 日本製箔株式会社 Flaw detection equipment for metal foil containers
GB2458320A (en) * 2008-03-14 2009-09-16 Vernacare Ltd Electromagnetic testing apparatus for hollow containers
CN103149218A (en) * 2012-12-20 2013-06-12 杭州中粮包装有限公司 Empty jar online detection method and device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS577545A (en) * 1980-06-18 1982-01-14 Toyo Seikan Kaisha Ltd Rotary type continuously optical inspecter for empty can
JPS5978965U (en) * 1982-11-17 1984-05-28 日本製箔株式会社 Flaw detection equipment for metal foil containers
GB2458320A (en) * 2008-03-14 2009-09-16 Vernacare Ltd Electromagnetic testing apparatus for hollow containers
GB2458320B (en) * 2008-03-14 2012-12-12 Vernacare Ltd Apparatus for testing the integrity of a hollow article
CN103149218A (en) * 2012-12-20 2013-06-12 杭州中粮包装有限公司 Empty jar online detection method and device

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