Class 204/218 - With current control

Subclass of Class 204 - Chemistry: electrical and wave energy
Definition: Apparatus including control means for the current supplied
No. of patents: 28
Last issue date: 08/07/2007

Number	Title	Issue Date
7252746	Electropolishing apparatus and method for medical implants An electropolishing apparatus and method are provided for polishing stents and other medical implants. The apparatus includes a motor that rotates a roller. The roller continuously rotates the medical implant to be electropolished. One of the advantages of the appar...	08/07/2007
6926812	Electric feeding method and apparatus for a continuous plating apparatus To avoid the formation of undesirable plating on electric supply rollers, there is provided a continuous plating apparatus in which a planar article to be plated is vertically clamped on both sides by electric supply rollers and the article to be plated is moved hor...	08/09/2005
6919010	Uniform electroplating of thin metal seeded wafers using rotationally asymmetric variable anode correction A substantially uniform layer of a metal is electroplated onto a work piece having a seed layer thereon. The current of a plating cell is provided from an azimuthally asymmetric anode, which is rotated with respect to the work piece (i.e., either or both of the work...	07/19/2005
6843894	Cathode current control system for a wafer electroplating apparatus A cathode current control system employing a current thief for use in electroplating a wafer is set forth. The current thief comprises a plurality of conductive segments disposed to substantially surround a peripheral region of the wafer. A first plurality of resist...	01/18/2005
6500316	Apparatus for rotary cathode electroplating with wireless power transfer An apparatus for rotary cathode electroplating having a head assembly, a substrate/thief assembly having a thieving ring which includes a number of individually chargeable segments, and a secondary induction assembly including a secondary core and a secon...	12/31/2002
6322674	Cathode current control system for a wafer electroplating apparatus A cathode current control system employing a current thief for use in electroplating a wafer is set forth. The current thief comprises a plurality of conductive segments disposed to substantially surround a peripheral region of the wafer. A first pluralit...	11/27/2001
6228242	Process and plant for electrolytically coating surface of a roll, for the continuous casting of thin metal strip, with a metal laser Both a process and plant are provided for electrolytically coating with a metal layer the casting surface of a roll for twin-roll or single-roll continuous casting of thin metal strip. The casting surface is at least partially immersed in an electrolyte s...	05/08/2001
6207037	Recovery of metal from solution Recovery of silver from a photographic fixer solution in an electrolytic cell is controlled so as to maintain a high current efficiency whilst minimizing unwanted side effects. The difference between plating voltages when operating at two different curren...	03/27/2001
6153065	Internal stress testing device for high speed electroplating An internal stress testing device for high speed electroplating is disclosed. The testing device comprises: a tank to be filled with a plating solution; a metal plate for anode disposed within the tank; a metal rod for cathode disposed within the tank and...	11/28/2000
5660706	Electric field initiated electroless metal deposition A technique for utilizing an electric field to initiate electroless deposition of a material to form layers and/or structures on a semiconductor wafer. The wafer is disposed between a positive electrode and a negative electrode and disposed so that its de...	08/26/1997
5454921	Electrolytic combined processing machine An electrolytic combined processing machine includes a grinding wheel spaced apart from and facing a workpiece, a current switching circuit for switching a coarse grinding to a fine grinding of the workpiece by the grinding wheel, and an infeed switching ...	10/03/1995
5225059	Apparatus for single anode brush electroplating An apparatus for electroplating conductive surfaces, in particular rotatable surfaces. A hand held anode includes a porous surface material such as polypropylene wool, backed by an inert anode mounted on a handle and connected to a source of direct curren...	07/06/1993
5184550	Device for controlling wetting behavior of metal surfaces by application of electrolyte under controlled voltage Apparatus for controlling the wetting behavior of the surface of a cylinder formed of passivatable metal. A wetting device is used to apply an electrolyte to the surface of the metal cylinder. A direct current source is connected between the wetting devic...	02/09/1993
4909917	Electrolytic treatment apparatus An apparatus for electro-coating disc-like workpieces (can ends for food cans) comprises an electrolyte tank and a carrier wheel mounted for rotation with one third of its periphery in the electrolyte. The wheel carries equi-spaced pallets, each defining ...	03/20/1990
4855020	Apparatus and method for the electrolytic plating of layers onto computer memory hard discs An apparatus for the electrolytic plating of computer memory discs comprising a plating container for the receipt of a liquid plating bath, a spindle fitted to the plating container, a prime mover connected to the spindle for causing relative rotational m...	08/08/1989
4746410	Current collecting assembly for a rotatable body A current collecting assembly for a body, such as an electrodepositing drum, mounted to rotate about a shaft (16) includes a current collector removably connected to an end of the shaft (16), a current conductor (12) connected to a current supply conducto...	05/24/1988
4720329	Apparatus and method for the electrolytic plating of layers onto computer memory hard discs An apparatus for electrolytic plating of computer memory discs comprising a plating container, a spindle, a prime mover, an anode, and an electrical transmission system. The plating container contains a liquid plating bath having a nickel compound include...	01/19/1988
4693792	System for electrolytical treatment of printing cylinders During electrolytical treatment, a printing cylinder is held between center points, of which one is provided adjustably with a centering sleeve in a tail spindle. A belt connects the tail spindle in force transmitting relationship to a drive. The tail spi...	09/15/1987
4405421	Method of and apparatus for electrochemically grinding a conductive workpiece An improved electrochemical grinding wheel electrode consisting essentially of electrically conductive abrasive grains bonded together with an essentially nonconductive bonding matrix. The abrasive grains are admixed with an amount of 10 to 30% by volume ...	09/20/1983
4304641	Rotary electroplating cell with controlled current distribution An apparatus and a method for rotary electroplating a thin metallic film having a uniform thickness and composition throughout. The apparatus includes a flow-through jet plate having nozzles of increasing size and uniformly spaced radially therethrough, o...	12/08/1981
4211630	Electrolytic recovery of silver from photographic bleach-fix baths This invention relates to the recovering of metallic silver from photographical bleach-fix baths. An electric current is passed through a bleach-fix solution containing silver ions and ferric ions, which solution has been brought to a predetermined redox ...	07/08/1980
4170528	Method of balancing a rotatable element The disclosure illustrates a method and apparatus for precision balancing a rotatable element such as the turbine shaft assembly of a turbocharger. The turbine-shaft assembly is placed in a machine that detects the position and degree of unbalance. The ma...	10/09/1979
4166781	Recovery of silver from hypo Means to plate silver from photographic hypo combines an electrolytic cell having a plating cathode with means to feed hypo solution to the cell at various constant volume supply rates and with means to supply electric energy to the cell comprising means ...	09/04/1979
4132618	Electrolytic device for marking metallic parts At least one cylinder having electrically conductive portions and in tangential contact with a metallic tube is associated with a tank filled with electrolyte which is brought to the contact surface between cylinder and tube as a result of rotational moti...	01/02/1979
4120771	Device for manufacturing substantially flat dies There is described a method for manufacturing by electroplating substantially flat dies or similar, which comprises adjusting the electric current strength by varying the sparing between the cathode and the anode inside the electrolyte proper....	10/17/1978
4080268	Method for high speed chromium plating of cylindrical articles A method for the high speed chromium plating of piston rings, cylinder liners and the like wherein the cathodic workpiece is rotated at a peripheral speed of 1-4 m/sec. relative to a concentrically disposed anode. The latter may comprise a single spoked m...	03/21/1978
4028199	Method of producing metal powder A metal powder e.g. copper or zinc, is produced from a dilute aqueous solution of the metal by subjecting the dilute aqueous solution to electrolysis in a cell having a rotating cylinder cathode and in accordance with the equation: where I is the current ...	06/07/1977
3939053	Apparatus for the electrolytic polishing of niobium structures A hollow niobium body, rotatable about a horizontal axis, is arranged for partial immersion in an electrolyte of H2 SO4, HF and H2 O. A generally concentric opening at one end receives a cathode. Evolved gases rise therefr...	02/17/1976

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Class 204/218 - With current control