Closure end made of sheet
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专利名称：Closure end made of sheet
发明人：Lutz Strube,Peter Hoft,Dieter Heinecke
申请号：US09398885
申请日：19990920
公开号：US06223931B1
公开日：
20010501
专利内容由知识产权出版社提供
专利附图：
摘要：A closure end is provided, particularly made of sheet material for beverage cans, in which an annular fringe region is radially coupled between the central panel
portion and a radius of curvature coupled to a core groove with an inner leg. The central panel portion is squeezed such that material is displaced (flows) from the fringe region in
a substantially radial outward direction towards the radius of curvature. The squeezing is accomplished by a coining tool having a coining surface operable to contact the closure end. The closure surface is pressed against the closure end causing the thickness of the sheet material of the closure end to be reduced in the annular fringe region. The reduction in thickness gradually decreasing in the direction of the radius of curvature. The material displaced by the squeezing flowing towards the radius of curvature. A ring tool which is finger like in cross section can be used to exert pressure on the core groove during or after the squeezing thereby causing the inner leg of the core groove to move towards a more vertical orientation.
申请人：SCHMALBACH-LUBECA AG
代理机构：Duane, Morris & Heckscher LLP
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