a device for degassing melts , especially plastic melts , which has a melt nozzle with an inlet connection for connecting to a melt supply , a melt outlet opening and a vacuum chamber defined by essentially vacuum - tight walls , which communicates with a vacuum source and which opens into a discharge opening for an essentially vacuum - tight connection to a melt processing system , the melt outlet opening of the nozzle extending into the degassing chamber . the melt outlet opening of the nozzle is configured as a slit of a length which is a multiple of its width and which has a curved or folded configuration .