Determination of the quality of the seal of sealed capsules using a microwave resonator and related equipment for in-line inspection

摘要

The invention relates to a method of inspection of a filled hard capsule sealed with a solvent sealing agent, including a process for determining the quality of the seal, said process comprising - supplying a filled hard capsule (1) sealed with a solvent sealing agent; - supplying a microwave resonator (27) wherein a measuring field characterized by a resonance curve is generated; - directing said capsule through the measuring field; - measuring characteristics related to the modification of the resonance curve produced by the presence of the capsule (1 ) in the measuring field, in comparison with a reference resonance curve corresponding to an empty state of the resonator; and - using the measured characteristics to determine a value associated with the quality of the seal. The invention also relates to a method for sorting capsules on the basis of the result of the inspection method and to an associated equipment able to carry out such methods.