US2012180544A1PendingUtilityA1
Metal sheet pressing method
Est. expiryJul 19, 2022(expired)· nominal 20-yr term from priority
B21D 31/02B21D 28/26B21D 22/02B21D 37/16
54
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Claims
Abstract
This invention provides a metal sheet pressing method of precision-pressing a metal sheet, wherein after a metal sheet ( 1 ) is partially drawn so as to form a perforated portion ( 1 a ), the perforated portion ( 1 a ) is heated by baking and after it is heated by baking, the perforated portion ( 1 a ) is pressed with press dies into an uneven-surface shape.
Claims
exact text as granted — not AI-modified1 . A metal sheet pressing method of precision-pressing a metal sheet, wherein after a metal sheet is partially drawn so as to form a perforated portion, the perforated portion is heated by baking and after it is heated by baking, the perforated portion is pressed with press dies into an uneven-surface shape.
2 . A metal sheet pressing method according to claim 1 , wherein the perforated portion of the metal sheet is formed in a mesh shape.Join the waitlist — get patent alerts
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