Abstract: An apparatus for heating plastic receptacles and particularly plastic parisons may include a transport device, which transports the plastic receptacles along a predetermined transport path, a microwave generation device, and a routing device, which routes the microwaves in the direction of the plastic receptacles which are to be heated The routing device may be at least sectionally in the form of a hollow conductor. The apparatus includes a control device which is in a form such that it controls the microwave energy hitting the plastic receptacles during the heating process.

Abstract: The invention relates to a device (1) for heating plastic preforms (10), comprising at least one microwave generator (2) that generates an alternating electromagnetic field in the form of microwaves, a microwave transmission unit (4) that transmits the microwaves generated by the microwave generator (2) to a resonator unit (6), and a conveying device that conveys the plastic preforms (10) to the resonator unit (6), wherein the resonator unit (6) comprises a resonator housing (8) that forms a receptacle space (10) for heating the plastic preforms (10), said housing having at least one inner wall (22a, 22b, 22c) facing the plastic preforms (10) and an injection area (12) through which the microwaves are introduced into the resonator unit (6), wherein the inner wall (22a, 22b, 22c) is annealed on the surface thereof facing the plastic preforms at least in some sections such that the annealing reduces power losses in the inner wall caused by the microwaves.

Abstract: An apparatus (1) for heating plastic receptacles (10) and particularly plastic parisons (10) with a transport device (2), which transports the plastic receptacles (10) along a predetermined transport path, with a microwave generation device (4), with a routing device (6) which routes the microwaves in the direction of the plastic receptacles (10) which are to be heated, said routing device (6) being at least sectionally in the form of a hollow conductor. In line with the invention, the apparatus (1) has a control device (12) which is in a form such that it controls the microwave energy hitting the plastic receptacles (10) during the heating process.