Electrical heating device (11, 11', 111, 211, 311) with: - at least three heating elements (13, 13', 113, 213, 313), which can be separated or are formed separately but are arranged together, the heating elements (13, 13', 113, 213, 313) consisting of electrically conductive material with an electrically conductive surface and with a temperature resistance greater than 200°C, - at least one heating region (16, 116, 216, 316) in which the heating elements (13, 13', 113, 213, 313) are arranged in such a way that they touch each other, - at least two connection contacts (18, 18', 118, 218, 318) for the electrical connection of the heating elements (13, 13', 113, 213, 313) to a power supply, wherein: - at least one heating element (13, 13', 113, 213, 313) is connected to each connection contact (18, 18', 118, 218, 318), - the connection contacts (18, 18', 118, 218, 318) are arranged in the heating region (16, 116, 216, 316) or at the border (15, 215, 315) of the heating region (16, 116, 216, 316), - the heating elements (13, 13', 113, 213, 313) form at least one electrically conductive connection between the connection contacts (18, 18', 118, 218, 318), - the heating elements (13, 13', 113, 213, 313) exhibit a heating effect at least at a contact area to a connection contact (18, 18', 118, 218, 318) or to another heating element (13, 13', 113, 213, 313) when a voltage is applied to the connection contacts (18, 18', 118, 218, 318) with current flowing through the heating elements (13, 13', 113, 213, 313), characterised in that - the heating region (16, 116, 216, 316) is provided with boundaries, at least one boundary being movable in a direction into the heating region (16, 116, 216, 316) for increased compression of the heating elements (13, 13', 113, 213, 313) in the heating region (16, 116, 216, 316), - all heating elements (13, 13', 113, 213, 313) of the heating device (11, 11', 111, 211, 311) are identical, - a maximum diameter of the heating elements (13, 13', 113, 213, 313) is 3 mm to 20 mm. - at least three heating elements (13, 13', 113, 213, 313), which can be separated or are formed separately but are arranged together, the heating elements (13, 13', 113, 213, 313) consisting of electrically conductive material with an electrically conductive surface and with a temperature resistance greater than 200°C, - at least one heating region (16, 116, 216, 316) in which the heating elements (13, 13', 113, 213, 313) are arranged in such a way that they touch each other, - at least two connection contacts (18, 18', 118, 218, 318) for the electrical connection of the heating elements (13, 13', 113, 213, 313) to a power supply, - at least one heating element (13, 13', 113, 213, 313) is connected to each connection contact (18, 18', 118, 218, 318), - the connection contacts (18, 18', 118, 218, 318) are arranged in the heating region (16, 116, 216, 316) or at the border (15, 215, 315) of the heating region (16, 116, 216, 316), - the heating elements (13, 13', 113, 213, 313) form at least one electrically conductive connection between the connection contacts (18, 18', 118, 218, 318), - the heating elements (13, 13', 113, 213, 313) exhibit a heating effect at least at a contact area to a connection contact (18, 18', 118, 218, 318) or to another heating element (13, 13', 113, 213, 313) when a voltage is applied to the connection contacts (18, 18', 118, 218, 318) with current flowing through the heating elements (13, 13', 113, 213, 313), characterised in that - the heating region (16, 116, 216, 316) is provided with boundaries, at least one boundary being movable in a direction into the heating region (16, 116, 216, 316) for increased compression of the heating elements (13, 13', 113, 213, 313) in the heating region (16, 116, 216, 316), - all heating elements (13, 13', 113, 213, 313) of the heating device (11, 11', 111, 211, 311) are identical, - a maximum diameter of the heating elements (13, 13', 113, 213, 313) is 3 mm to 20 mm.