Pipe body and forming method of the same

Details Pipe body and forming method of the same Pipe body and forming method of the same

2008-01-15

2008-01-15

Hook, James (Department: 3754)

Pipes and tubular conduits

Longitudinally seamed

With diverse locking means

C138S166000, C138S168000, C029S450000, C072S051000

Reexamination Certificate

active

07318455

ABSTRACT:
The present invention provides a pipe body of which the edge sections contact with each other stably and which can be formed only by means of only a press processing without performing a welding in mass-producing, wherein separation-prevented engagement due to deformation of at least one of the engagement sections absorbs the spring back in the press processing. Also, the present invention provides a pipe body, a metal plate for the pipe body and a forming method of the pipe body using the sheet metal for the pipe body. The pipe body includes a pair of edge sections1e,1fforming closed end surface by means of contact with each other, wherein surroundings of each edge sections1e,1fform a plane1ajointly when each edge sections1e,1fare in contact with each other, and at the same time, engagement sections consisting of female engagement section1gand male engagement section1hengaged with each other are formed in the edge sections1e,1f, and the edge sections1e,1fget in contact with each other closely by means of separation-prevented engagement due to deformation of at least one of the female and male engagement sections1g,1h.

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Office Action, Japanese Patent Application No. 2000-387031, in Japanese no English translation.

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