Patent ID: 7908894

Claim:
A dyeing device ( 100 ) in continuous with indigo for warp yarn chains ( 3 ) and/or fabrics, equipped with a first hermetically sealed dyeing compartment ( 1 ), suitable for containing the dye bath and at least one squeezing element ( 11 ) capable of exerting a strong pressure on the yarn chain ( 3 ), and a second hermetically sealed fixing/dehydration compartment ( 2 ) of said yarn ( 3 ), wherein said first ( 1 ) and second ( 2 ) compartments comprise an inert environment and are functionally and hermetically connected with each other wherein in said first ( 1 ) and second ( 2 ) compartments, there are means ( 4 ) for introducing nitrogen and/or deoxygenated air inside the first ( 1 ) and second ( 2 ) compartments wherein said second compartment ( 2 ) is provide with at least one means for directly heating and/or dehydrating the yarn ( 3 ) consisting of a plurality of heatable cylinders ( 5 ) on which the yarn ( 3 ) passes, to increase the diffusion and fixing of the dye in the yarn ( 3 ) and to dehydrate said yarn ( 3 ) so as to increase the absorption of the dye in the subsequent yarn ( 3 ) processing phases, and wherein at least one of said cylinders ( 5 ) can also be cooled.