the invention relates to a device for producing and / or applying a substantially planar material combination which is formed from at least two surface regions and has a predefined combined width , combined height , and / or combined length . said device comprises a conveying unit that defines a direction of travel and has a conveying surface . the device also comprises an application unit including an application nozzle which has a slit - shaped outlet extending substantially transverse to the direction of application and which allows the first surface region made of a first extrudate and the second surface region made of a second extrudate to be extruded onto the conveying surface . the application nozzle comprises at least one conveying unit for conveying an extrudate onto the conveying surface . the conveying unit allows the conveyed volume , the conveyed mass , the conveying speed , and / or the conveying time of at least one of the extrudates to be controlled .