SQUARE CAN AND METHOD AND DEVICE FOR DOUBLE-SEAMING THE SAME

Title:

SQUARE CAN AND METHOD AND DEVICE FOR DOUBLE-SEAMING THE SAME

Document Type and Number:

WIPO Patent Application WO/2006/123637

Kind Code:

A1

Abstract:

A square can capable of securing high sealing performance even if the radius of curvature of the seamed part at its seamed corner part is reduced, enabling a reduction in the depth of its counter sink, reduced in size, and having excellent sealability and storage efficiency and a method and a device for double-seaming the square can. A secondary seaming roll (55) is guided by a model cam for secondary seaming having a model cam surface for secondary seaming formed in such a shape that it is swelled from a model cam surface for primary seaming outwards at the corner seamed part (5). Accordingly, the seamed part of the corner caulking part (5) is formed in such a shape that the seamed width thereof at the center of the corner seamed part is larger than the seamed width of the linear sealed part (4) of the can and is swelled outwards to absorb an increase in plate thickness at the corner seamed part. Also, a seaming wall part (6) is formed in a tilted seamed shape so that the overlap of a cover hook (8) with a body hook (10) of a prescribed amount can be secured without allowing the cover hook (8) to fall from the body hook (10) so as to maintain excellent sealability.

Inventors:

OOHORI KEI (JP)
YOSHIDA KIYOTAKA (JP)
MORISHITA SUNAO (JP)
KURODA KANJI (JP)
YASUDA NORIFUMI (JP)
ANDO KAZUO (JP)
KATOH HISASHI (JP)

Application Number:

PCT/JP2006/309710

Publication Date:

November 23, 2006

Filing Date:

May 16, 2006

Export Citation:

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Assignee:

TOYO SEIKAN KAISHA LTD (JP)
OOHORI KEI (JP)
YOSHIDA KIYOTAKA (JP)
MORISHITA SUNAO (JP)
KURODA KANJI (JP)
YASUDA NORIFUMI (JP)
ANDO KAZUO (JP)
KATOH HISASHI (JP)

International Classes:

B65D8/20; B21D51/30

Foreign References:

JPS63281721A

1988-11-18

Other References: