Methods for making an easy-opening can end
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United States of America Patent
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-
Jan 4, 2005
Grant Date -
Nov 21, 2002
app pub date -
Mar 20, 2002
filing date -
Aug 12, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for making an easy-opening can end comprising providing an upper die and a lower die, at least one of the upper die and the lower die having a curved surface with a radius of 0.1 to 1 mm at the tip portion thereof, the other die having a flat surface at the tip portion thereof; and press-forming an end panel by using the upper die and the lower die to form a score on the upper surface or the lower surface of the end panel so that the end panel has a thickness of 0.025 to 0.08 mm at the thinnest portion thereof.
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