Loading patent…
AssigneeKrones AG
InventorsJohann Zimmerer, Konrad Senn, Guenter Winkler, Andreas Apelsmeier
Estimating the term…
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.
An apparatus (1) for the heating of containers and, in particular of plastics material pre-forms (10), with at least one microwave production unit (4) which produces an electromagnetic alternating field in the form of microwaves, a microwave transmission unit (6) which transmits the microwaves produced by the microwave production unit (4) to a resonator unit (16), and with a conveying device which conveys the plastics material pre-forms (10) with respect to the resonator unit (16), wherein the resonator unit (16) has a resonator housing (8) forming a receiving space (25) for heating the plastics material pre-forms (10) and having at least one inner wall (22a, 22b, 22c) facing the plastics material pre-forms (10) and a coupling-in area (12) by way of which the microwaves are introduced into the resonator unit (16), wherein the inner wall (22a, 22b, 22c) is treated at least locally on its surface facing the plastics material pre-forms (10), in such a way that, as a result of this treatment in the inner wall, wall current losses caused by the microwaves are reduced.
(canceled)
Dependencies are inferred from the claim text.