Patent ID: 6716381
Filing Date: 2004-04-06
Classification: H01M,Y02E,Y10T

Abstract:
A process for producing an embossed flexible graphite sheet having sheet floors and sheet lands, comprising:a. providing an embossing apparatus which generally comprises two opposed elements, i. one of the two opposed elements comprising an embossing element having an embossing pattern thereon, the embossing pattern formed by arraying a series of walls having a predetermined height from the surface of the embossing element and channel floors, about the surface of the embossing element, the walls having lands; and ii. the other of the two opposed elements comprising a landing element having an impact surface, wherein the embossing element and landing element are arrayed in the embossing apparatus such that the impact surface of the landing element is separated from the channel floors of the embossing element by a distance â€œdâ€  which is at least equal to the height of the walls;b. embossing a flexible graphite sheet by passing it between the embossing element and the landing element of the embossing apparatus such that the lands of the embossing element exert pressure on the flexible graphite sheet, wherein the flexible graphite sheet has a thickness in the region of the embossing pattern prior to embossing which is less than distance â€œdâ€ , but greater than the distance between the impact surface of the landing element and the lands of the walk of the embossing element, thus forming a gap between the flexible graphite sheet and the channel floors of the embossing element.