A device for applying adhesive onto predominantly flat material blanks, wherein these material blanks respectively have at least one linear depression as preparation for a bending point, with said device comprising at least • a transport device with at least one transport means for transferring at least one material blank into the processing position of the device in a transport plane, wherein the transport means is connected to and driven by a controllable drive, • a glue application device, which is arranged above the transport plane and has • a controllable application nozzle for linearly applying adhesive onto the material blank in its processing position and • a displacement device with a linear guide, which is arranged parallel to the transport plane of the material blank and on which the application nozzle is arranged so as to be displaceable along a direction of displacement, and with a controllable drive, which is connected to and drives the receptacle of the application nozzle via driving means (xx) in order to displace the application nozzle, • a control of the device, which is connected to the drive of the transport device, to the application nozzle and/or to the drive of the displacement device in order to transmit control signals, • an advancing device of the nozzle receptacle with a guide for the application nozzle, wherein the application nozzle can be advanced along this guide in an advancing direction that essentially extends perpendicular to the transport plane of the material blank, • a means for moving the application nozzle along this guide, and • a backup roller, which is arranged on the receptacle of the application nozzle in such a way that the advance motion of the application nozzle along the advancing guide is limited by this backup roller, wherein the rotational axis of the backup roller is oriented essentially parallel to the transport plane of the material blank and essentially perpendicular to the direction of displacement of the nozzle receptacle, characterized by a support rail that is arranged between the material blank and the backup roller, wherein the support rail extends over the entire travel of the backup roller along the direction of displacement, which is oriented parallel to the transport plane. • a transport device with at least one transport means for transferring at least one material blank into the processing position of the device in a transport plane, wherein the transport means is connected to and driven by a controllable drive, • a glue application device, which is arranged above the transport plane and has • a controllable application nozzle for linearly applying adhesive onto the material blank in its processing position and • a displacement device with a linear guide, which is arranged parallel to the transport plane of the material blank and on which the application nozzle is arranged so as to be displaceable along a direction of displacement, and with a controllable drive, which is connected to and drives the receptacle of the application nozzle via driving means (xx) in order to displace the application nozzle, • a controllable application nozzle for linearly applying adhesive onto the material blank in its processing position and • a displacement device with a linear guide, which is arranged parallel to the transport plane of the material blank and on which the application nozzle is arranged so as to be displaceable along a direction of displacement, and with a controllable drive, which is connected to and drives the receptacle of the application nozzle via driving means (xx) in order to displace the application nozzle, • a control of the device, which is connected to the drive of the transport device, to the application nozzle and/or to the drive of the displacement device in order to transmit control signals, • an advancing device of the nozzle receptacle with a guide for the application nozzle, wherein the application nozzle can be advanced along this guide in an advancing direction that essentially extends perpendicular to the transport plane of the material blank, • a means for moving the application nozzle along this guide, and • a backup roller, which is arranged on the receptacle of the application nozzle in such a way that the advance motion of the application nozzle along the advancing guide is limited by this backup roller, wherein the rotational axis of the backup roller is oriented essentially parallel to the transport plane of the material blank and essentially perpendicular to the direction of displacement of the nozzle receptacle,