Abstract: An assembly for an electrochemical device is provided, including a gas diffusion layer and a sealing element produced on the gas diffusion layer. The sealing element includes an inner sealing region fixed to the gas diffusion layer and an outer sealing region connected to the gas diffusion layer via the inner sealing region. The assembly has minimal warpage without the temperature in the injection molding tool having to be lowered and/or a geometric pre-compensation of the warpage of the sealing element in the inner sealing region. The sealing element includes a relief region arranged between the inner and outer sealing regions and a) includes a relief opening extending through the sealing element and/or b) has a smallest height (he), which is smaller than both one fourth of the greatest height (HI) of the inner sealing region and one fourth of the greatest height (HA) of the outer sealing region.

Abstract: The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising a drive piston which is able to be hydraulically adjusted from an initial position toward an end position and a drawing mandrel which is able to be brought releasably into operative connection with the drive piston and is able to be adjusted by the drive piston between a rivet receiving position and a setting position. In order to provide a riveting tool of the type mentioned in the introduction, uniform setting processes of rivets being able to be carried out thereby with a high degree of repeated accuracy, it is provided that the riveting tool for fixing the setting position of the drawing mandrel comprises a setting unit comprising a stroke limiting element which is able to be adjusted in the longitudinal axial direction of the drive piston and which is able to be brought into engagement with the drive piston.

Abstract: The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising a drive piston which is able to be hydraulically adjusted from an initial position toward an end position and a drawing mandrel which is able to be brought releasably into operative connection with the drive piston and is able to be adjusted by the drive piston between a rivet receiving position and a setting position. In order to provide a riveting tool of the type mentioned in the introduction, uniform setting processes of rivets being able to be carried out thereby with a high degree of repeated accuracy, it is provided that the riveting tool for fixing the setting position of the drawing mandrel comprises a setting unit comprising a stroke limiting element which is able to be adjusted in the longitudinal axial direction of the drive piston and which is able to be brought into engagement with the drive piston.