| 摘要 |
The invention relates to a metal closing disk with an essentially bar-shaped metal elevation of smaller diameter and with an insulating layer applied at least to the elevation surface side of the closing disk and consisting of a plastic or elastomer, especially for closing electrolytic can-type capacitors, and also to a process for improving the seal in closing disks of this type. Since it has been possible for an electrolyte to creep between the insulating layer and the underside of the closing disk in known closing disks provided with an insulating layer at least on the inner face and intended for electrolytic can-type capacitors, thus resulting in reforming actions and changes in capacitance, the object of the invention is to prevent this. Consequently, in a closing disk according to the invention, the insulating layer is made to adjoin flush the base region of the metal elevation formed on, so that the complete surface of the underside of the closing disk is consequently covered. Furthermore, there is in the base region of the elevation a flange-like projection which is brought into press-sealing contact with the insulating layer, for example as result of axial upsetting of material.
|
