The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 1994
Filed:
Nov. 05, 1992
Applicant:
Inventors:
Seiji Kawasumi, Shizuoka, JP;
Akio Uesugi, Shizuoka, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F / ;
U.S. Cl.
CPC ...
2041294 ; 20412943 ; 20412975 ;
Abstract
An apparatus and method for subjecting a material, such as an aluminum web, to an electrolytic roughening treatment. The apparatus includes a tank for storing an electrolytic solution, and for conveying the web through the solution. As the web is conveyed through the solution, it passes first and second electrodes, which are coupled to a power source circuit. The power source circuit generates an alternating current and applies the same to the electrodes. The circuit also includes a rectifying coil having an inductance (L.sub.1), which is at least ten times greater than the inductance (L.sub.2) of the load.