A device for applying dot-shaped coatings

摘要

The invention relates to a device for applying dot-shaped coatings to metal or metallized bands by means of an electrolysis process or by means of currentless metal extraction, said device being provided with a wheel-shaped guide means, along which a metal or metallized band can be passed, and with an endless masking means, which co-operates with said band during operation and which is provided with passages, whose shape is adapted to the desired dot-shaped coating. The masking means is built up of independent masking segments, which are each provided with at least one passage and which are mutually coupled in such a manner that they can move with respect to each other in the longitudinal direction of the masking means. Inner boundary planes of the masking segments co-operate with a circular supporting surface of the wheel-shaped means, and measured in the longitudinal direction of the masking means the total length of said inner boundary faces is larger than the length of the circular supporting surface of the wheel-shaped means.