A method for manufacturing an MEA including a layer system, the layer system
together
with a plastic film located above and below it being punched out by a heated and
shaped punching tool. The film-coated layer system, which is welded together only
at the outer edges, is further processed by heating and pressing the marginal zones
in a subsequent operation, the plastic film softening or melting in the marginal
zone and penetrating the marginal regions. Thus, the marginal region in the periphery
of the layer system is sealed in a gas-tight manner within seconds. The film inside
the marginal zones which is no longer needed or not heated is removed by suction.
