1520439 Filtering with filter aid ECODYNE CORP 2 Dec 1975 [23 Dec 1974] 49476/75 Heading BID One or more filters using a filter aid layer, particularly of mixed anion and cation resins of 60-400 U.S. mesh, are cleaned using water which is subsequently separated from the filter aid and stored for use in the next cleaning cycle. In the cleaning cycle the water is first passed forwards through the fi...

A painting booth through which a conveyor passes to transfer articles such as automobile bodies to be painted. The booth comprises spraying spaces each with a paint spraying machine disposed therein, buffer spaces adjoining the respective spraying spaces and a duct arranged to blow air into each spraying space. To minimize power and heat expenses for operation of the booth, each buffer space has a...