| 摘要 |
AN APPARATUS (10) FOR APPLYING A THIN FILM OF A LIQUID COATING MEDIUM ONTO A CURVED SURFACE (12) OF GLASS BULB (11) OF A PICTURE SCREEN IS PROVIDED WITH A ROTATABLY DRIVABLE TURNTABLE (20) ON WHICH A RECEPTACLE (30) FOR THE ARTICLE (11) TO BE COATED IS HELD IN A MANNER FIXED AGAINST RELATIVE ROTATION, WITH A PROCESS POT (50) HELD NONROTATABLY AND SURROUNDING THE RECEPTACLE (30) AND THE TURNTABLE (20), AND WHICH A SPRAY RING (60), WHICH SURROUNDS THE SURFACE (12) TO BE COATED OF THE ARTICLE (11) AND IS RETAINED ON THE OPEN END OF THE PROCESS POT (50). IN ORDER TO ACHIEVE EASY HANDLING AS THE GLASS BULD (11) TO BE COATED IS INSERTED AND REMOVED, AND TO ACHIEVE A FILM THAT DURING OPERATION HAS CONSIDERABLY IMPROVED UNIFORMITY IN THE CRITICAL CORNER AND EDGE REGIONS OF THE SURFACE TO BE COATED, IT HAS PROVIDED THAT THE SPRAY RING (60), PROVIDED WITH A CENTRAL INFLOW OPENING (65), AND THE TOP PART (51) OF THE PROCESS POT (50), A FIRST ANNULAR GAP (67), EXTENDING TO BENEATH A FASTENING EDGE OF THE ARTICLE (11) ON THE RECEPTACLE (30), IS PROVIDED WHOSE CROSS SECTION IS SUBSTANTIALLY LESS THAN AN ANNULAR FLOW PASSAGE (71) BETWEEN THE SPRAY RING (60) AND THE ARTICLE (11) RETAINED IN THE RECEPTACLE (30) IS PROVIDED WITH A SUCTION CONE (32), WHICH POINTS TOWARD A BOTTOM (54) OF THE PROCESS POT (50) AND BETWEEN WHICH AND AN OUTER WALL OF THE PROCESS POT (50) THERE IS A FURTHER ANNUALR GAP (37) AND INSIDE WHICH A PRESSURE RELIEF CHAMBER (36), JOINTLY DEFINED BY THE BOTTOM (54) OF THE PROCESS POT (50), IS FORMED; AND THAT A LAMINAR FLOW (A) IS AIMED AT THE SPRAY RING (60), OR THE TOP OF THE PROCESS POT (50), AND THE BOTTOM (54) OF THE PROCESS POT (50) IS JOINED TO A SUCTION FLOW (B).(FIG. 1)
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