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:
Jan. 01, 2008
Filed:
Apr. 29, 2004
Takumi Ohhara, Fukushima, JP;
Satoshi Sato, Fukushima, JP;
Takumi Ohhara, Fukushima, JP;
Satoshi Sato, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a method in which the inside surface of the negative electrode cup of an alkaline battery is coated with metal or metal alloy having a higher hydrogen overpotential than copper, the mask used for coating processing has the shape in which: when d is the diameter of the negative electrode cup, t is the plate thickness of the negative electrode cup, A is the diameter of the mask opening on the negative electrode cup mounting side, B is the diameter of the mask opening on the negative electrode cup supplying side, h is the depth of the negative electrode cup, C is the thickness of mask on negative electrode cup mounting side, and D is a tapered angle of the mask opening on the negative electrode cup, 2(2t+d)−B>A ≧0.7d, (A/2)−h≧C>0 mm, and 90°>D≧45° are satisfied to coat only the inside surface area except a cuff portion and cuff bottom portion.