Metal deforming – By use of roller or roller-like tool-element – Plural roller-couples
Reexamination Certificate
2006-02-28
2006-02-28
Larson, Lowell A. (Department: 3725)
Metal deforming
By use of roller or roller-like tool-element
Plural roller-couples
C072S247000
Reexamination Certificate
active
07004002
ABSTRACT:
A strip rolling mill includes a pair of upper and lower work rolls for rolling a strip, intermediate rolls for supporting each of the paired work rolls, and back-up rolls for supporting each of the intermediate rolls. Each of the work rolls is provided with a tapered portion at one end thereof so that the tapered portions of the work rolls are on opposite sides of roll bodies thereof with respect to roll axis directions. When the material with a constant width is being rolled, axial positions of the work rolls are set at appropriate positions and axial positions of the intermediate rolls are changed to control a thickness distribution in a width direction of the material being rolled. This arrangement significantly improves an edge drop and at the same time minimizes edge drop variations.
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Copy of Office Action generated in corresponding Taiwanese application No. 90121038 and English translation of Office Action.
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Horii Kenji
Kobayashi Hideo
Maeno Ichirou
Matsui Youichi
Nakamae Hirokazu
Crowell & Moring LLP
Hitachi , Ltd.
Larson Lowell A.
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