JPS56117843A - Production of easy-to-open can cap of small can opening force - Google Patents

Production of easy-to-open can cap of small can opening force

Info

Publication number
JPS56117843A
JPS56117843A JP2019880A JP2019880A JPS56117843A JP S56117843 A JPS56117843 A JP S56117843A JP 2019880 A JP2019880 A JP 2019880A JP 2019880 A JP2019880 A JP 2019880A JP S56117843 A JPS56117843 A JP S56117843A
Authority
JP
Japan
Prior art keywords
shear
tool
opening force
metal sheet
cap
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
JP2019880A
Other languages
Japanese (ja)
Inventor
Takanari Gokan
Akihiro Handa
Masanobu Matsubara
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.)
Toyo Kohan Co Ltd
Original Assignee
Toyo Kohan 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 Toyo Kohan Co Ltd filed Critical Toyo Kohan Co Ltd
Priority to JP2019880A priority Critical patent/JPS56117843A/en
Publication of JPS56117843A publication Critical patent/JPS56117843A/en
Pending legal-status Critical Current

Links

Landscapes

  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

PURPOSE: To easily produce an easy-to-open can cap of small can opening force by performing shear prestraining twice forward and backward in the same shearing surface.
CONSTITUTION: A metal sheet (steel sheet) 1 is grasped under pressure by means of a shearing tool 2 and a sloped plane tool 3, and primary shear prestrain is applied thereto. The horizontal position of the edge part 2A of the shearing tool 2 is often between the sloped face 3A-3B of the tool 3. Thence, the metal sheet 1 having undergone the 1st process is taken out and this is placed between plane tools 4, 5 and is grasped under pressure until the metal sheet 1 goes flat, whereby secondary shear prestrain is applied in the direction opposite from the thickness direction. Thereby, an extremely sharp notched part is constituted in the bottom part of the score produced by the forward-backward shear prestraining, and the can opening force is decreased by stress concentration, Bauschinger effect and working effect.
COPYRIGHT: (C)1981,JPO&Japio
JP2019880A 1980-02-19 1980-02-19 Production of easy-to-open can cap of small can opening force Pending JPS56117843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019880A JPS56117843A (en) 1980-02-19 1980-02-19 Production of easy-to-open can cap of small can opening force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019880A JPS56117843A (en) 1980-02-19 1980-02-19 Production of easy-to-open can cap of small can opening force

Publications (1)

Publication Number Publication Date
JPS56117843A true JPS56117843A (en) 1981-09-16

Family

ID=12020462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019880A Pending JPS56117843A (en) 1980-02-19 1980-02-19 Production of easy-to-open can cap of small can opening force

Country Status (1)

Country Link
JP (1) JPS56117843A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996026026A1 (en) * 1995-02-22 1996-08-29 Nippon Steel Corporation Easily openable metallic can lid of superior openability and method of manufacturing same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50143682A (en) * 1974-05-02 1975-11-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50143682A (en) * 1974-05-02 1975-11-19

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996026026A1 (en) * 1995-02-22 1996-08-29 Nippon Steel Corporation Easily openable metallic can lid of superior openability and method of manufacturing same
US5927536A (en) * 1995-02-22 1999-07-27 Nippon Steel Corporation Metal easy open can lid superior in can openability and process for production of thereof

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