JPS57211548A - Seam detector for sheet including metal foil - Google Patents

Seam detector for sheet including metal foil

Info

Publication number
JPS57211548A
JPS57211548A JP9717881A JP9717881A JPS57211548A JP S57211548 A JPS57211548 A JP S57211548A JP 9717881 A JP9717881 A JP 9717881A JP 9717881 A JP9717881 A JP 9717881A JP S57211548 A JPS57211548 A JP S57211548A
Authority
JP
Japan
Prior art keywords
seam
metal foil
coils
pair
including metal
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
JP9717881A
Other languages
Japanese (ja)
Inventor
Masaji Tatsumi
Tetsuo Tatsuno
Hideki Kobayashi
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.)
Toppan Inc
Original Assignee
Toppan Printing 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 Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP9717881A priority Critical patent/JPS57211548A/en
Publication of JPS57211548A publication Critical patent/JPS57211548A/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
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9013—Arrangements for scanning

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

PURPOSE:To make it possible for sure to detect a seam that has been electrically insulated and to obtain improved easiness of operation and simplification of electric circuit by arranging a pair of coils in opposed positions with a sheet in between them. CONSTITUTION:A seam 3' is detected 9a, 9b as a sheet 3 including a metal foil which has an electrically insulated seam 3' and the thickness of which is 20mu or less is made to travel. In this case a pair of coils 2a and 4a are juxtaposed in parallel to each other with their coil diameter being over 1.5 times the distance between a pair of coils 2b and 4b and their coil diameter. With this arrangement detection of the seam 3' is ensured.
JP9717881A 1981-06-23 1981-06-23 Seam detector for sheet including metal foil Pending JPS57211548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9717881A JPS57211548A (en) 1981-06-23 1981-06-23 Seam detector for sheet including metal foil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9717881A JPS57211548A (en) 1981-06-23 1981-06-23 Seam detector for sheet including metal foil

Publications (1)

Publication Number Publication Date
JPS57211548A true JPS57211548A (en) 1982-12-25

Family

ID=14185324

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9717881A Pending JPS57211548A (en) 1981-06-23 1981-06-23 Seam detector for sheet including metal foil

Country Status (1)

Country Link
JP (1) JPS57211548A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60135812A (en) * 1983-12-19 1985-07-19 ザ・バブコツク・アンド・ウイルコツクス・カンパニー Device for measuring pitch between adjacent rod in nuclear fuel aggregate
JPH01150665A (en) * 1987-12-04 1989-06-13 Omron Tateisi Electron Co Slip processor
JPH11343056A (en) * 1998-06-03 1999-12-14 Fujimori Kogyo Kk Seam detecting device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60135812A (en) * 1983-12-19 1985-07-19 ザ・バブコツク・アンド・ウイルコツクス・カンパニー Device for measuring pitch between adjacent rod in nuclear fuel aggregate
JPH045325B2 (en) * 1983-12-19 1992-01-31
JPH01150665A (en) * 1987-12-04 1989-06-13 Omron Tateisi Electron Co Slip processor
JPH11343056A (en) * 1998-06-03 1999-12-14 Fujimori Kogyo Kk Seam detecting device

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