Patent ID: 8033202

Claim:
A method of forming an electrode layer for a flat capacitor, the method comprising: placing a sheet between a punch and a die having a die hole; delivering a lubricant to a lubrication dam extending around a periphery of an upper end of the die hole, the lubrication dam including a ridge and a lubrication reservoir area behind the ridge, wherein the ridge does not extend around the entire periphery of the upper end of the die hole such that the ridge includes an opening to a protrusion extending into an interior of the die hole so as to direct the lubricant from the lubrication reservoir area behind the ridge to the protrusion extending into the interior of the die hole at the opening in the ridge; and actuating the punch to punch an electrode layer out of the sheet, wherein the location of the sheet at the ridge opening at the protrusion extending into the interior of the die hole receives more lubricant than sheet locations around the rest of the periphery not at the ridge opening.