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Electrical Contact Method for Continuous Reel Plating

IP.com Disclosure Number: IPCOM000042121D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Caricchio, JJ: AUTHOR [+2]

Abstract

The general method for providing DC electrical contact to parts being plated by continuous reel plating is to make the cathodic contact to the parts by using a spring-loaded block, meshing metal brushes, grooved bus bar, metal sprockets or some equivalent mechanical technique. Improved performance can be obtained by making electrical contact with the parts using acid or other suitable conducting electrolyte contained in a cell which is in line with the plating cells to, in effect, "surround" the strip of parts with a total liquid infinite contact system. In essence, the cell containing the conducting electrolyte in conjunction with an inert cathodic electrode serves to complete the electrical plating circuit through the power supply and plating cell.

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Electrical Contact Method for Continuous Reel Plating

The general method for providing DC electrical contact to parts being plated by continuous reel plating is to make the cathodic contact to the parts by using a spring-loaded block, meshing metal brushes, grooved bus bar, metal sprockets or some equivalent mechanical technique. Improved performance can be obtained by making electrical contact with the parts using acid or other suitable conducting electrolyte contained in a cell which is in line with the plating cells to, in effect, "surround" the strip of parts with a total liquid infinite contact system. In essence, the cell containing the conducting electrolyte in conjunction with an inert cathodic electrode serves to complete the electrical plating circuit through the power supply and plating cell. The negative or cathodic electrode which touches the supporting electrolyte (contact solution) should be made from some inert metal, such as platinum or palladium, and be in the form of wire, foil, rod, etc. Also, adequate rinsing is required between the contact cell and the plating cell, although this thorough rinsing may not be essential if the contact solution is compatible with the plating solution. Compared to the traditional techniques for making electrical, DC, cathodic contact to continuous parts for plating, this method offers the following distinguishing features and advantages: 1. No mechanical parts to wear, break, or corrode. 2. Total and intimate con...