Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Reexamination Certificate
2006-10-24
2006-10-24
Banks, Derris H. (Department: 3725)
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
C072S453130
Reexamination Certificate
active
07124614
ABSTRACT:
The invention relates to a method and an arrangement in a press tool for reducing the relative speed at which a moveable sheet metal holder impacts against a press upper part for transmitting a working force or is separated therefrom on completion of pressing. The invention is characterised in that the force for acceleration of the sheet metal holder is transmitted from the press upper part by way of a mechanical transmission device fitted to the sheet metal holder in such a way that an initial movement is imparted to the holder before the press upper part comes to bear against the sheet metal fabrication and sheet metal holder, and that only then does the press upper part impact against sheet metal fabrication and sheet metal holder and for depression of gas-filled springs arranged adjacent to and supporting the sheet metal holder.
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patent: 1 113 185 (2004-11-01), None
Axelsson Jacob
Cronholm Markus
Banks Derris H.
Merchant & Gould P.C.
Stromsholmen AB
Wolfe Debra
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