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 forceInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50143682A (en) * | 1974-05-02 | 1975-11-19 |
-
1980
- 1980-02-19 JP JP2019880A patent/JPS56117843A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50143682A (en) * | 1974-05-02 | 1975-11-19 |
Cited By (2)
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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