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. 27, 2004
Filed:
Sep. 26, 2000
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A porous metal material was filled with an active material slurry, dried, and then rolled to a predetermined thickness. This rolling causes pores formed by a network skeleton to be stretched in the rolling direction (direction represented by the arrow in FIG. ( )) to form pores having a shape similar to ellipsoid or deformed ellipsoid having a long axis. Subsequently, the porous metal material was cut in such an arrangement that the longitudinal direction of the pores having a shape similar to ellipsoid or deformed ellipsoid coincides with the crosswise direction of the electrode plate, and then subjected to roller treatment through a series of rollers in the longitudinal direction of the electrode plate. This roller treatment causes numerous cracks to be formed at a very small pitch in the direction parallel to the rolling direction as shown diagrammatically in FIG. ( ).