Treatment device intended for drying a laminated strip comprising: - two crosspieces (2, 3), upper and lower, extending transversely to the metal strip, on either side of the strip, the upper crosspiece embedding an upper pressure cylinder and rollers supporting said upper pressure cylinder, the lower crosspiece embedding a lower pressure cylinder and rollers supporting said lower pressure cylinder, - actuation means (Vh) and a guiding means (Gl) enabling the crosspieces (2, 3) to pass from a separated position, referred to as idle position, to a close position, referred to as working position, for which the two pressure cylinders (4, 6), upper and lower, disposed on either side of the strip, transversely to the direction of travel, are each intended to be applied under pressure to the strip by means of said support rollers (5, 7) distributed along the length of the pressure cylinder, and on at least two rotation axes (A4; A7) parallel to the longitudinal axis of said pressure cylinder, characterised in that, for each crosspiece (2; 3), lower or upper, - a first compartment (50; 70) supports all said support rollers (5; 7) associated with the lower or upper pressure cylinder, the first compartment (50; 70) being a removable element of the crosspiece (2; 3), by sliding said compartment along the longitudinal axis of the crosspiece, - a second compartment (40; 60) supports the pressure cylinder (4; 6), lower or upper, the second compartment being a removable element of the crosspiece, by sliding said compartment along the longitudinal axis of the crosspiece, and so as to enable extraction of said pressure cylinder (4; 6) by sliding said second compartment (4; 6), while the first compartment (50, 70) and the corresponding support rollers (5, 7) are kept in said crosspiece (2; 3). - two crosspieces (2, 3), upper and lower, extending transversely to the metal strip, on either side of the strip, the upper crosspiece embedding an upper pressure cylinder and rollers supporting said upper pressure cylinder, the lower crosspiece embedding a lower pressure cylinder and rollers supporting said lower pressure cylinder, - actuation means (Vh) and a guiding means (Gl) enabling the crosspieces (2, 3) to pass from a separated position, referred to as idle position, to a close position, referred to as working position, for which the two pressure cylinders (4, 6), upper and lower, disposed on either side of the strip, transversely to the direction of travel, are each intended to be applied under pressure to the strip by means of said support rollers (5, 7) distributed along the length of the pressure cylinder, and on at least two rotation axes (A4; A7) parallel to the longitudinal axis of said pressure cylinder, - a first compartment (50; 70) supports all said support rollers (5; 7) associated with the lower or upper pressure cylinder, the first compartment (50; 70) being a removable element of the crosspiece (2; 3), by sliding said compartment along the longitudinal axis of the crosspiece, - a second compartment (40; 60) supports the pressure cylinder (4; 6), lower or upper, the second compartment being a removable element of the crosspiece, by sliding said compartment along the longitudinal axis of the crosspiece,