Patent ID: 7871230
Filing Date: 2011-01-18
Classification: B21D,C22C,Y10T

Abstract:
1. A mold apparatus comprising an upper mold and a lower mold facing the upper mold, thereby forming a score on one side of a can end fabricated by a resin-laminated metal sheet, wherein the upper mold has a convex part for forming the score, the convex part has a specified cross sectional shape at a part contacting the resin-laminated metal sheet, the cross sectional shape is composed of a curve having a change rate of inclination defined as dtanθ/dx of 0.08 to 0.006 to the upper surface of the facing lower mold, or having the curve and a straight line, and the formed score has a maximum width of 0.80 mm to 0.36 mm.