Title:
MANUFACTURING METHOD FOR LID THAT REQUIRES NO CAN OPENER
Document Type and Number:
WIPO Patent Application WO/2010/061961
Kind Code:
A1
Abstract:
In a manufacturing method for lids that require no can opener, a panel structure part and a score are formed using a laminated steel sheet with a resin coating on both sides. In a cross-sectional view of a scoring die used to form the aforementioned score, the front end is a curved line, the two edges to the sides of the front end have a scoring blade part that is configured with tangents of the curved line, the front end is configured with a curved line with a curvature radius of 0.2‑0.4mm, the elevation angle (θ) of the two edges is 0.3 ≦ tanθ ≦ 1.0 with respect to the surface of the lid, and the panel structure part is formed synchronized with the pressing of the scoring die against the surface of the laminated steel sheet during the formation of the score. With the manufacturing method, a lid that requires no can opener and has excellent appearance can be manufactured without distortion and requiring no lid machining equipment.
Inventors:
KOJIMA KATSUMI (JP)
KUBO HIROSHI (JP)
YAMANAKA YOICHIRO (JP)
TADA MASAKI (JP)
IWASA HIROKI (JP)
KUBO HIROSHI (JP)
YAMANAKA YOICHIRO (JP)
TADA MASAKI (JP)
IWASA HIROKI (JP)
Application Number:
PCT/JP2009/070265
Publication Date:
June 03, 2010
Filing Date:
November 26, 2009
Export Citation:
Assignee:
JFE STEEL CORP (JP)
KOJIMA KATSUMI (JP)
KUBO HIROSHI (JP)
YAMANAKA YOICHIRO (JP)
TADA MASAKI (JP)
IWASA HIROKI (JP)
KOJIMA KATSUMI (JP)
KUBO HIROSHI (JP)
YAMANAKA YOICHIRO (JP)
TADA MASAKI (JP)
IWASA HIROKI (JP)
International Classes:
B21D51/44; B65D17/28
Foreign References:
JP2004298887A | 2004-10-28 | |||
JP2006088209A | 2006-04-06 | |||
JPS5516800A | 1980-02-05 | |||
JPS4840553B1 | 1973-12-01 | |||
JPH09108758A | 1997-04-28 | |||
JPH06115546A | 1994-04-26 | |||
JPH1191775A | 1999-04-06 | |||
JP2004298887A | 2004-10-28 |
Other References:
See also references of EP 2380677A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
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