Method and apparatus for determining the mass of portioned units of active substances

US7337074B2 · kind B2 · utility

Inventors

• Rainer Herrmann · Hamburg, DE
• Stefan Zaage · Hannover, DE
• Udo Schlemm · Hamburg, DE

Key dates

• Filing date: Apr 6, 2004
• Grant date: Feb 26, 2008
• Expiry date: Jul 13, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01G17/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and the apparatus for determining the mass of portioned units of active substances, in particular capsules, tablets or dragees, involves leading the units of active substances through a microwave resonator and determining the mass from the displacement of the resonant frequency and the broadening of the resonance curve.