Apparatus for spraying articles carried by a conveyor

摘要

Apparatus for use in spraying articles, hides for one example, while being carried on a conveyor has a rotatable spray unit supported over the conveyor and its radial arms are provided with spray heads, each under the control of a normally closed valve opened by air under pressure. A series of controls are provided, each including a sensing unit and the sensing units are arranged as a series extending transversely of the conveyor and dividing the conveyor into lengthwise sections with each unit operated by the passage of a part of a hide along that section and when operated providing a signal substatially equal to the length of that part and so controlling the delivery of air to the control valve of each head traversing that conveyor section as to provide that spray is delivered only when and for the time that the detected part is within the spray path.