Patent ID: 6840076

Claim:
A strip treatment line for leveling metal strip comprising: an upstream roll set comprising two two-roll bridles each looped by a high-quality steel strip and braking passage of said strip for maintaining tension therein; a dressing mill stand having a pair of dressing rolls engaging said strip between them and located downstream of said upstream roll set, said dressing rolls being constructed and arranged for thickness reduction of said strip to a dressed thickness; a first roll directly downstream of said dressing mill stand and looped by said strip immediately upon said strip traversing said dressing roll stand and constructed and arranged for applying tension and stretch to said strip so as to effect an elastic stretching of said strip close to an elastic limit of said strip or an elastoplastic or plastic stretching of said strip between said dressing mill stand and said first roll; a second roll spaced downstream of said first roll and looped by said strip immediately upon said strip passing over said first roll, said second roll being constructed and arranged to apply tension and stretch to said strip between said first and second rolls, said first and second rolls being configured to effect elastoplastic or plastic stretching of said strip between said first and second rolls, said first and second rolls forming a stretching roll pair, and a downstream roll set comprising two two-roll bridles each looped by said strip downstream of said stretching roll pair for generating tension in said strip between said roll sets.