Apparatus and method for improving contact between a web and a roll
a technology of electroplating conductor and web, applied in the direction of fluid pressure measurement, liquid/fluent solid measurement, peptide measurement, etc., can solve the problems of adding to the total amount of time needed to produce an end product, affecting the production rate, etc., and achieve the effect of reducing or eliminating the occurrence of arc pits
Inactive Publication Date: 2006-11-02
ARCONIC INC
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Benefits of technology
[0011] This invention also discloses a method for reducing or eliminating the occurrence of arc pits in a metallic sheet during an electrocoating process including providing a metallic sheet, feeding the metallic sheet between the opposing surfaces of a crowned conductor roll and a hold down roll, wrapping the metallic sheet around the crowned conductor roll wherein the crowned conductor roll is deformed by the mechanical forces resulting from the sheet tension, and applying an electrical current through the crowned conductor roll to electrochemically deposit a coating onto a surface of the metallic sheet.
[0014] One aspect of this invention is to reduce or eliminate the occurrence of arc pits in a metallic sheet during an electrocoating process.
[0015] Another aspect of this invention is to fabricate a crown that can compensate for the deflection of a conductor roll when the conductor roll is under a load.
Problems solved by technology
This, however, can have a negative impact on the rate of production since the amount of time needed to coat the metal substrate would increase thereby adding to the total amount of time needed to produce an end product.
Method used
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[0023] The accompanying figures and the description that follow set forth this invention in its preferred embodiments. However, it is contemplated that persons generally familiar with electroplating conductor rolls will be able to apply the novel characteristics of the structures and methods illustrated and described herein in other contexts by modification of certain details. Accordingly, the figures and description are not to be taken as restrictive on the scope of this invention, but are to be understood as broad and general teachings. When referring to any numerical range of values, such ranges are understood to include each and every number and / or fraction between the stated range minimum and maximum. For purposes of the description hereinafter, the terms “upper”, “lower”, “right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, and derivatives thereof shall relate to the invention as it is oriented in the drawing figures.
[0024] The term “crown” is generally understood in s...
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Abstract
This invention discloses a conductor roll that is surrounded by a crown that extends along a substantial portion of the length of the conductor roll. The crown is designed to compensate for the deflection of the conductor roll when the conductor roll is placed under a load.
Description
FIELD OF THE INVENTION [0001] This invention relates to electrocoating or electroplating conductor rolls. Specifically, this invention relates to a crown that is designed to compensate for the deflection of the conductor roll when the conductor roll is subjected to a mechanical load. BACKGROUND OF THE INVENTION [0002] In a typical electrocoating process, a metal substrate is coated by utilizing an electric current to deposit a coating onto the substrate. The metal substrate, which may be either anodic or cathodic, carries the electrical current that is used by the chemical reactions that deposit the coating onto the surface of the substrate. In processes commonly referred to as electroplating (e.g. electrogalvanizing and electrotinning) the metal substrate is cathodic. In contrast, the metal substrate is anodic in processes often referred to as anodizing. In other electrocoating processes, the metal substrate may be either cathodic or anodic depending upon the desired chemistry of t...
Claims
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Login to View More IPC IPC(8): C25B7/00C25D1/12
CPCC25D1/04C25D17/06C25D7/0657C25D13/22C25D11/005
Inventor BOWMAN, KENNETH A.PRACHT, JOHN L.BECKER, BERNARD J.
Owner ARCONIC INC