Abstract: The invention relates to a compressor (20) for generating a compressed air flow for a fuel cell (10), having a compressor element (21), in particular a compressor wheel, wherein the compressor element (21) is coupled in a to a drive shaft (23) for co-rotation, the drive shaft (23) being driven by a motor (22), in particular an electric motor, wherein at least one hydrodynamic or hydrostatic bearing (24, 25) is used to mount the shaft (23) in a rotatable manner, wherein the plain bearing (24, 25) is connected to a lubricant supply means (30), which is used to supply a lubricant for hydrodynamic or hydrostatic pressure generation to the plain bearing (24, 25), wherein the lubricant is water or a fluid mixture, predominantly comprising water, wherein the plain bearing (24, 25) has a lubricant inlet and a lubricant outlet, wherein the lubricant can be routed to the plain bearing (24, 25) via the lubricant inlet and the lubricant can be discharged from the plain bearing (24, 25) via the lubricant outlet, and where

Abstract: The invention relates to a device (1) for applying media to flat substrates (2), especially printed circuit boards, said device comprising a printing device for applying media to the substrate (2) during a printing method, an optical monitoring device for checking the arrangement and/or alignment of the substrate (2) in relation to the printing device, and a dispenser (10) for the additional application of media to the substrate (2). According to the invention, the dispenser (10) is fixed in relation to the optical monitoring device.