Patent ID: 9664285
Date: 2017-05-30
CPC Classifications: B21D,F01N,F16J,Y10T

Claim:
1. A flat seal having at least one single-piece sheet-metal seal layer defining a layer plane, which has at least one first layer region provided with at least one medium through opening and, seen in a plan view of the sheet-metal layer, outside the first layer region, at least one second layer region and with the flat seal installation-ready, has a pre-determined outer contour, wherein the flat seal for the medium through opening has a medium-sealing device which is associated with said medium through opening, characterized in that, at least one sub-region of the second layer region of the installation-ready flat seal lying, when seen in a plan view of the seal layer, outside the medium-sealing device is formed by a stretched sheet-metal region of the sheet-metal layer that is stretched in the layer plane to achieve the pre-determined outer contour such that the installation-ready flat seal comprises the stretched sheet-metal region prior to installation of the flat seal.