| 摘要 |
962,473. Coating webs. SOC. DES ACCUMULATEURS FIXES ET DE TRACTION. Sept. 26,1961 [Sept. 27,1960; Aug. 4, 1961], No. 34450/61. Heading D1L. A device for adjusting the thickness of coating layers adhering to both faces of a metal strip or like support comprises two stationary cylinders situated on each side of the strip with their axes parallel to the strip plane and urged towards the strip, said cylinders having thin projecting ribs with sharp edges which press against the faces of the strip so that a clearance having a constant depth is provided between the strip and the surfaces of the cylinders. As shown strip 3 coming from a spool 4 dips into tank 1 containing coating product 2 so that on issuing therefrom it is coated on both sides. The strip then passes through device 5 for adjusting and ensuring uniformity of the thickness of the coating before entering drying oven 6 and thereafter a sintering oven 7. The device 5 (Fig. 2) comprises a cradle made of two end plates 9, 9, connected by cross-pieces 10 and supporting two heavy cylinders 12, 12. The cylinders 12 are provided with a series of thin circumferential ribs 14 which contact the strip 3 passing therethrough. Thus a uniform clearance 15 is established between the opposite faces of strip 3 and the surfaces of the cylinders 12 thus ensuring a uniform thickness of coating. In a further embodiment the ribs are eccentric with the rest of the cylinder so that by adjusting the angular position of the cylinder and locking them in the adjusted position, the thickness of the coating may be adjusted. With this arrangement differing thicknesses of coating may be provided on each side or on one side the coating may be removed completely. In a further embodiment ribs near the end of the cylinders are arranged closer together and depth of the clearance between them is increased to prevent a beading effect at the edge of the strip. The cylinders 12 may be composed of a number of separate discs mounted none rotatably on a mandrel. A wiping member e.g. of neoprene may be provided on the ends of the cylinder. |
