Patent ID: 7966725
Filing Date: 2011-06-28
Classification: F16J,Y10T

Abstract:
1. Process for the production of a flat gasket, in particular a cylinder head gasket, which comprises at least one metal gasket sheet made of a spring steel or a metallic material with a percentage elongation after fracture corresponding to the percentage elongation after fracture of a spring steel, comprising the following process steps: generating a plurality of incisions in the gasket sheet; subsequently folding the region located between the incisions over to form a flange region of an edging fold folded over onto the gasket sheet and connected in one piece to the gasket sheet via a bending region of the edging fold; wherein the incisions are produced such that, after folding has occurred, the average length of the incision-free regions of the outer edge of the flange region of the edging fold between the incisions arranged consecutively in the longitudinal direction of the edging fold is greater than the average extent of the incisions in the longitudinal direction of the edging fold at the outer edge of the flange region.