Abstract: A dye coating head for depositing dye from a bath onto moving filaments, is in the form of a box having first and second portions (1 and 2) articulately interconnected with an upper portion (1) fixed and a lower portion (2) vertically swingable. A guide (3) for individual filaments of a layer of filaments is mounted on a side of the box which is upstream when seen in the direction movement of the filaments. This guide (3) is transversely displaceable relative to the direction of movement of the filaments. The vertically swingable lower portion (2) has a front wall (7) which, when raised, closes a front portion of the box when the guide (3) is rearwardly moved.