Abstract: The invention relates to a device for, and method of, applying, drying and activating hot glue on the packaging machine itself. In the case of the basic option, the device works as follows: two assemblies (1) for applying and drying glue are positioned on the plates (3) of machine (M). Assemblies (1) are made up of consoles (11) mounted in a way that enables them to slide and move, their front end on the lever (32) and their rear end on the shaft (31) attached between two plates (3). The lever (32) is attached, by way of levers (33), between the plates (3). One device (12) for applying hot glue is attached to the consoles (11), just above the lever (32), while a number of fans (13) are fastened along the console (11), above the device (12), as well as on the opposite side. The heater (4) is horizontally attached to the carrier (42) and positioned in the opening (43) on the plate (41). The strip heater (7) is made up of an endless strip (71) and vertical heaters (72).