Method and device for verifying coloring agent cartridge for printer

Abstract

In order to verify a magnetic card and so on, the principle: an amorphous alloy material generates a magnetic pulse due to the Barkhausen effect at a predetermined magnetic level, is used. In this connection, a method for verifying a replaceable coloring agent cartridge loaded in a printer includes providing an amorphous magnetic member on a genuine coloring agent cartridge loaded in a main body; providing, in the main body, an exciting coil for exciting the amorphous magnetic member in an AC magnetic field and a detecting coil for detecting the AC magnetic field passing through the amorphous magnetic member; and verifying the coloring agent cartridge based on whether or not a magnetic pulse which is generated at a predetermined level of the AC magnetic field and which is superimposed on a detection signal of the detecting coil is generated at a predetermined phase position in a period of the AC magnetic field.

Dependencies are inferred from the claim text.