Nkk Corporation

Masayoshi Kurihara

Yuji Yamasaki

Reiko Sugihara

Yoshinori Yomura

Masahisa Fujikake

Yoichiro Yamanaka

Haruo Suzuki

Yutaka Mihara

Tetsuya Sampei

Toshimichi Omori

Takahiro Kanero

Masayoshi Nakagawa

A method for making an easy-opening can end comprising providing an upper die and a lower die, at least one of the upper die and the lower die having a curved surface with a radius of 0.1 to 1 mm at the tip portion thereof, the other die having a flat surface at the tip portion thereof; and press-forming an end panel by using the upper die and the lower die to form a score on the upper surface or the lower surface of the end panel so that the end panel has a thickness of 0.025 to 0.08 mm at the thinnest portion thereof.

Methods for making an easy-opening can end

An easy opening can end is provided whose can end panel is made of steel sheet having both sides coated with resin layers which each include at least one type of thermoplastic resin and which have elongation after break of 100% or more, tensile strength of 10 kg/mm or more, Young modulus of 100 kg/mm or more and a thickness in range of 10 to 100 &mgr;m. A score is formed on at least one of a front or a back side of the can end panel so as to be capable of breakage for opening the can end. The score has a bottom cross-section in a shape of an arc having a radius in a range of 0.10 to 1.0 mm, and a thinnest section of the score has a thickness t in a range of 0.025 to 0.080 mm. The easy opening can end has no problem of resin layer damage when the score is formed and has excellent can openability to such an extent that children and the aged may easily open the can end, so that the easy opening can end is most suitable for a can end of a beverage can and a food can.

Easy opening can end and method for fabricating the same

Soft magnetic steel material having excellent DC magnetization

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Fukuyama, Japan

Masayoshi Kurihara