Specialty steamer for color development.

摘要

A steamer for color development supplies saturated steam into a closed space for performing a steaming treatment on a substrate that has been subjected to a dyeing treatment and a treatment for imparting a fising agent. The steamer (2) has a row of substrate transport rolls (32) arranged in the upper part of the closed space. In order to detect the substrate, which droops between adjacent transport rolls and is transported by means of the respective transport rolls, the substrate detecting sensors (37), which consists of at least two units or which is of a continuous linear mechanism, are provided below the space between adjacent transport rolls in the direction of substrate drooping. If one of the sensors (37) located in the upper row is not capable of substrate detection, the rotational speed of the substrate transport roll (32) above that non-applicable sensor is decelerated; on the other hand, if any one of the sensors located in the lower row has detected the substrate (6), the rotational speed of the roll associated with that sensor is accelerated. The time for which the substrate (6) stays within the steamer can be controlled by ensuring that the drooping substrate will always be folded back between the upper and lower rows of sensors (37). <IMAGE>