Patent ID: 7975580
Filing Date: 2011-07-12
Classification: B21D,Y10T

Abstract:
1. A method for operating a sheet placement system for punching presses, said method comprising the steps of: moving a feed slide between the punching die of a punching press and a transfer position located in front of said punching press; seizing a sheet in a rear edge area of said sheet using first connection means of said feed slide, in the transfer position; said sheet being seized exclusively from above in the rear edge area of said sheet, said rear edge area extending between a rear edge of the sheet and the surfaces to be punched out by said punching press; advancing said sheet stepwise through said punching press in a two dimensional plane in response to the cycle of said punching press; wherein said first connection means initially seize the sheet prior to said advancing step in a positive fit by means of a plurality of pointed projections that pierce the sheet, said first connection means comprising a ledge having the plurality of pointed projections extending downwardly from a lower surface of said ledge through respective ducts, said first connection means further seizing the rear edge area of said sheet via a vacuum engaging said rear edge area.