Abstract: The invention relates to a device for guiding a band-type product (1) especially a metal band, comprising at least two conical deflectors (2, 2?) arranged head to foot. According to the invention, each deflector (2, 2?) comprises a fixed base (3, 3?) whereon are mounted, in the manner of satellites, a plurality of rotating guiding rolls (4, 4?) forming the same angle (A) with an axis (30, 30?) of the deflector (2, 2?), and said deflectors (2, 2?) are oriented relative to the longitudinal running axis (10) of the band (1) so that the latter comprises successively, in the running direction, an upstream portion (1a) tangent and perpendicular to an input generatrix (5a) on a first deflector (2), a central portion (1b) tangent and perpendicular, upwardly to an output generatrix (5b) of the first deflector (2) and, downwardly, to an input generatrix (5?a) on the second deflector (2?) and a downstream portion (1c) tangent and perpendicular to an output generatrix (5?b) of the second deflector (2?).

Abstract: The object of the invention is a process for detecting latent flatness defects in a band product (2) applied under tensile load to an angular sector (A) of measuring roll (1) comprising a plurality of detection zones (4) spaced apart each comprising a transmission sensor (3), at each rotation, of a measurement signal having a value under load (i) which is compared, at each rotation, with a reference value, in order to assess, in each longitudinal zone of the band (2), information representative of the tensile load applied in this zone.

Abstract: The invention relates to a method for thermal control of the profile of a roll in a mill by spraying, over a cooled zone (4) of the roll (1), a series of jets of fluid (J), each forming an oblong impact surface (S). According to the invention, the distance (a) between the middle axes of the impact surfaces (S) is caused to vary in relation to the position of the said impact surfaces over the length of the cooled zone (4) so that the said zone comprises a central zone (41, 43) with a substantially constant pitch and whereas two transition zones (44) extend on either side of the central zone at least up to two edges (13) of the band (M) and in which the spacing between the middle axes of the impact surfaces (S) is reduced with respect to the constant pitch (a) of the central zone (41, 43).

Abstract: The invention relates to a method for thermal control of the profile of a roll in a mill by spraying, over a cooled zone (4) of the roll (1), a series of jets of fluid (J), each forming an oblong impact surface (S).