Title:
スロット付き管状ライナにおけるスロット幅を縮小させる方法
Document Type and Number:
Japanese Patent JP4299538
Kind Code:
B2
Abstract:
A method of reducing slot width in slotted tubular liners. A slotted tubular liner ( 1 ) is provided having an interior surface ( 3 ), an exterior surface ( 2 ) and a plurality of slots ( 4 ) extending between the interior surface and the exterior surface. One or more contoured rigid forming tools ( 7 ) are provided. Pressure is applied to either the interior surface ( 3 ) or the exterior surface ( 2 ) of the slotted tubular liner ( 1 ) with the contoured rigid forming tools ( 7 ). The contoured rigid forming tools are then moved in a sweep pattern traversing either the interior surface or the exterior surface of the slotted tubular liner, until plastic deformation narrows the width of the plurality of slots ( 4 ) to within desired tolerances. The method does not require the same precise positioning of previously known methods and, as such, provides a combination of increased output and lower cost.
Inventors:
Slack Maurice William
Application Number:
JP2002537459A
Publication Date:
July 22, 2009
Filing Date:
October 23, 2001
Export Citation:
Assignee:
Regent Technologies Limited
International Classes:
B21C37/15; B21D22/14; B21C37/06; B21C37/30; B21H1/00
Domestic Patent References:
| JP200033443A |
Foreign References:
| US6112570 |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Nobuo Ogawa
Takaki Nishijima
Atsushi Hakoda
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Nobuo Ogawa
Takaki Nishijima
Atsushi Hakoda