JPS5544933A - Method of inspecting outer surface of can body - Google Patents

Method of inspecting outer surface of can body

Info

Publication number
JPS5544933A
JPS5544933A JP11823678A JP11823678A JPS5544933A JP S5544933 A JPS5544933 A JP S5544933A JP 11823678 A JP11823678 A JP 11823678A JP 11823678 A JP11823678 A JP 11823678A JP S5544933 A JPS5544933 A JP S5544933A
Authority
JP
Japan
Prior art keywords
cylinder
reflected light
flaw
photodetector
normally reflected
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
JP11823678A
Other languages
Japanese (ja)
Inventor
Hiroshi Kakita
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.)
Daiwa Can Co Ltd
Original Assignee
Daiwa Can Co Ltd
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 Daiwa Can Co Ltd filed Critical Daiwa Can Co Ltd
Priority to JP11823678A priority Critical patent/JPS5544933A/en
Publication of JPS5544933A publication Critical patent/JPS5544933A/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
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires

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)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To accurately detect the flaw of a can body by disposing a photodetector which does not receive the normally reflected light from the outer surface of the can body having no vertical flaw and receives the normally reflected light partially from flaw on the outer surface at the position illuminated by slit light rays. CONSTITUTION:A can body 10' is first mounted on a can body supporting cylinder 12, and the air in the can body is evacuated from an air inlet hole 13 to make the bottom 15 of the can body contact with the end surface 16 of the cylinder 12 and to fix the can body to the cylinder 12. When this operation of the can body is completed, the cylinder 12 is rotated by one revolution. The slit light rays 27 always projected from a light illuminator 21 are illuminated over the entire periphery of the central portion of the outer surface of the can body 10' mounted on the cylinder 12. At this time the normally reflected light from the curved surface of normal radius of curvature of the reflected light from the can body does not illuminate the photodetector 31, but illuminates the photodetector 31 from the can body having vertical flaw.
JP11823678A 1978-09-26 1978-09-26 Method of inspecting outer surface of can body Pending JPS5544933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11823678A JPS5544933A (en) 1978-09-26 1978-09-26 Method of inspecting outer surface of can body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11823678A JPS5544933A (en) 1978-09-26 1978-09-26 Method of inspecting outer surface of can body

Publications (1)

Publication Number Publication Date
JPS5544933A true JPS5544933A (en) 1980-03-29

Family

ID=14731594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11823678A Pending JPS5544933A (en) 1978-09-26 1978-09-26 Method of inspecting outer surface of can body

Country Status (1)

Country Link
JP (1) JPS5544933A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204745A (en) * 1983-05-10 1984-11-20 Tomoki Takashima Inspection apparatus of can product
JPS62211548A (en) * 1986-03-12 1987-09-17 Toyo Seikan Kaisha Ltd Method and device for detecting buckled can
JPS63228050A (en) * 1986-07-28 1988-09-22 サン−ゴバン・シネマテイツク・エ・コントロ−ル Inspection of transparent body
JPH01206242A (en) * 1988-02-12 1989-08-18 Kirin Brewery Co Ltd Method and apparatus of checking curved surface

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4893381A (en) * 1972-03-11 1973-12-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4893381A (en) * 1972-03-11 1973-12-03

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204745A (en) * 1983-05-10 1984-11-20 Tomoki Takashima Inspection apparatus of can product
JPS62211548A (en) * 1986-03-12 1987-09-17 Toyo Seikan Kaisha Ltd Method and device for detecting buckled can
JPS63228050A (en) * 1986-07-28 1988-09-22 サン−ゴバン・シネマテイツク・エ・コントロ−ル Inspection of transparent body
JPH01206242A (en) * 1988-02-12 1989-08-18 Kirin Brewery Co Ltd Method and apparatus of checking curved surface

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