Fig. 80.—The DeVilbiss Auto Cool Electric Exhaust Fan, Closed, and Open for Cleaning.
Location of the Work Cabinets.
Fig. 81.—Sketch of Spraying Cabinets, Showing side Lighting.
As to the position of the spraying benches, it is a little curious to note that in not a few cases these cabinets are placed facing the window, the idea being to obtain as much light as possible for the process. A moment's consideration, however, will show that this is not the correct position, because the workman faces the light, which is thrown on the back of the article he is spraying, in exactly the wrong position for his purpose. The cabinets should be lighted from the back of the workman and be, as far as possible, directed from the roof or the top of the room, so that it comes directly on the article to be sprayed. Clearly it is necessary to provide as good a light as possible in order that no part of the work shall be missed.
Artificial light will, as a rule, be provided for working on dark days and after the sun sets, and here again the same provision must be made. Plenty of light arranged in such a manner that it is directed on the front of the object to be painted is essential in every case.
After due provision has been made for a suitable exhaust, which question should be left in the hands of the specialist in compressed air painting if satisfaction is to be guaranteed, other questions need attention, such as provision of means for handling the work, special turn-tables, which should be ball-bearing, if possible, to ensure light running and enable even heavy articles to be turned about when spraying, and when examining the work.
Fig. 82.—"Aerograph" Spraying Cabinets.