Metal deforming – By use of roller or roller-like tool-element – Roller or roller-like tool-element of particular configuration
Reexamination Certificate
2008-01-08
2008-01-08
Banks, Derris H. (Department: 3725)
Metal deforming
By use of roller or roller-like tool-element
Roller or roller-like tool-element of particular configuration
C072S243600, C072S247000
Reexamination Certificate
active
10489593
ABSTRACT:
In the case of a rolling stand for producing rolled strip, which is provided with rolls which are axially displaceable with respect to one another, have a curved contour running over the entire effective barrel length and complement one another exclusively in a specific relative axial position of the rolls in the unloaded state, it is intended for the thickness profile of the roll gap over the active roll barrel length to be varied by axial displacement of the rolls provided with a roll barrel contour in relation to one another in such a way that a strip that is planar and free from undulations is obtained. This takes place by the profile of the barrel contour of the rolls of a pair of rolls being formed by a trigonometric function and the roll gap contour also being formed by a trigonometric function in dependence on the profile of the barrel contour and the position of the rolls within the axial displacement region.
REFERENCES:
patent: 3857268 (1974-12-01), Kajiwaka
patent: 4519233 (1985-05-01), Feldmann et al.
patent: 4781051 (1988-11-01), Schultes et al.
patent: 4955221 (1990-09-01), Feldmann et al.
patent: 5218852 (1993-06-01), Watanabe et al.
patent: 5622073 (1997-04-01), Hiruta et al.
patent: 36 20 197 (1987-12-01), None
patent: 0 049 798 (1982-04-01), None
patent: 0 091 540 (1983-10-01), None
patent: 0 294 544 (1988-12-01), None
patent: 0 401 685 (1990-12-01), None
U.S.Patent 4,440,012 corresponds to EPO 049 798.
U.S. Patent 4,881,396 corresponds to EP 294 544.
U.S. Patents 4,800,742 and 4,955,221 correspond to DE 36 20 197 A1.
International Search Report.
Kainz Alexander
Mayrhofer Andeas
Seilinger Alois
Banks Derris H.
Ostrolenk Faber Gerb & Soffen, LLP
Voest-Alpine Industrieanlagenbau GmbH & Co.
Wolfe Debra M
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