Apparatus for electroplating
DCFirst Claim
1. An improved arrangement for electrolytic coating of an elongated flexible metallic substrate comprising:
- (a) means to pass a longitudinally extended cathodic workpiece having at least one surface to be coated through containment means for a body of electrolytic solution containing metallic ions to be plated out upon and bathing such surface to be coated,(b) an anode mounted closely adjacent the pass line of said cathodic workpiece within said containment means in contact with said electrolytic solution,(c) at least one elongated resilient narrow surface contact dielectric means arranged generally transversely of said longitudinally extended cathodic workpiece to resiliently contact the surface to be coated of the cathodic workpiece along an extended narrow contact interface between said surface of the workpiece and the resilient narrow surface contact dielectric means while submersed in the body of electrolytic solution,(d) means to move the longitudinally extended cathodic workpiece past the resilient narrow surface contact dielectric means, and(e) means to replenish electrolytic solution within the body of solution to prevent said body of electrolytic solution from becoming depleted of coating metal ions at the electrolyte-cathode interface.
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Accused Products
Abstract
A continuous strip is electrolytically coated in an electrolytic coating bath using a thin flexible or resilient dielectric wiping blade to wipe bubbles of hydrogen from the surface, sever dendritic material, if such is present as the coating thickens, and to remove a surface layer of partially depleted electrolytic solution, replacing with fresh solution and to stabilize strip portions extending between support rolls. The resilient dielectric wiper blade is preferably used with perforated anodes which allow fresh electrolytic solution to flow into the space between the anodes and the strip surface after being expelled by passage of the strip past the wiping blade. The orifices in the anode may be differentially sized to eliminate cavitation behind the wiping blades. The wiping blades may be chevron shaped to increase the wiping effect and pumps may be used to increase the flow of electrolytic solution into and out of the space between the anodes and the strip. Chevron shaped wiping blades may be used to increase the wiping effectiveness and continuous movable wiping blades may be used to provides additional wiping surface as the original wiping surface wears down. The wiping blades may also be angularly oriented with respect to the strip to increase the wiping effectiveness.
60 Citations
29 Claims
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1. An improved arrangement for electrolytic coating of an elongated flexible metallic substrate comprising:
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(a) means to pass a longitudinally extended cathodic workpiece having at least one surface to be coated through containment means for a body of electrolytic solution containing metallic ions to be plated out upon and bathing such surface to be coated, (b) an anode mounted closely adjacent the pass line of said cathodic workpiece within said containment means in contact with said electrolytic solution, (c) at least one elongated resilient narrow surface contact dielectric means arranged generally transversely of said longitudinally extended cathodic workpiece to resiliently contact the surface to be coated of the cathodic workpiece along an extended narrow contact interface between said surface of the workpiece and the resilient narrow surface contact dielectric means while submersed in the body of electrolytic solution, (d) means to move the longitudinally extended cathodic workpiece past the resilient narrow surface contact dielectric means, and (e) means to replenish electrolytic solution within the body of solution to prevent said body of electrolytic solution from becoming depleted of coating metal ions at the electrolyte-cathode interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An improved wiping means for wiping the surface of continuously extended workpieces during electrolytic coating comprising:
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(a) an extended plastic blade having a narrow coating surface contact portion on one side and a mounting portion generally opposed thereto, (b) a transversely extended flange as part of the mounting portion of the blade arranged and adapted to interengage with a mounting track for such blade, (c) said blade including resilient characteristics in the narrow coating surface contact portion including a restricted contact area for contacting an electrolytic coating surface. - View Dependent Claims (22, 23, 24, 25, 26)
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27. An improved electrolytic coating surface wiper and anode for electrolytic coating continuous strip material comprising:
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(a) an anode having a plurality of orifices through the anode through which electrolytic solution can effect substantially free passage, (b) the anode being sectionalized into separate sections with flanges at least at one end of the sections, (c) dielectric resilient wiping blade means mounted between the flanges of adjacent sections of the anode, (d) securing means to secure the flanges of adjoining sections of anode together with the wiping blade means between them into a unitary structure, (e) the dielectric resilient wiping blade means having a chevron configuration with the apex of said chevron arranged and adapted to be oriented opposite the direction of movement of continuous strip material being coated. - View Dependent Claims (28, 29)
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Specification