Method of working recessed portion in headrest stay and...

Details Method of working recessed portion in headrest stay and... Method of working recessed portion in headrest stay and...

2008-09-16

2008-09-16

Suhol, Dmitry (Department: 3725)

Metal deforming

Process

Tube making or reshaping

C072S214000, C072S220000, C029S897200, C029S893320

Reexamination Certificate

active

10626739

ABSTRACT:
In a method of working a recessed portion2in a headrest stay32which is provided in the stay portion32of the headrest stay3formed of a pipe, a recess2′ is preformed by pressing against the stay portion32an outer peripheral portion4aof a first punch roller4for preforming having a rounded portion47on the outer peripheral portion4ain a side view. Subsequently, an outer peripheral portion7aof a second punch roller7on the outer periphery portion7aof which a punch portion for final forming has been formed is directed toward and pressed against the recess2′,so as to form a recessed portion2.

REFERENCES:
patent: 2825962 (1958-03-01), Brown et al.
patent: 6170313 (2001-01-01), Vasseur et al.
patent: 6505493 (2003-01-01), Nakane et al.
patent: 2005/0034499 (2005-02-01), Matsumoto
patent: 43-14120 (1968-06-01), None
patent: 2002-137673 (2000-01-01), None
patent: 2002-210519 (2001-12-01), None
patent: 2002-137673 (2002-05-01), None
patent: 2004-291085 (2003-07-01), None

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