(under subclass 600) Coating apparatus including means to withdraw the coating material from the coating zone, means to treat the withdrawn coating material, and means to return such material to the coating zone subsequent to treatment.
(1) Note. Similar coating devices, not effective to treat recirculated material other than by nonradiant heat, will be found classified upon the basis of the nature of the coating operation, and see particularly subclasses 29, 312 and 429.
