Patent ID: 7857532
Filing Date: 2010-12-28
Classification: B41J

Abstract:
1. An ink ribbon cassette in which an ink ribbon used to form an image on a print medium is stored, the ink ribbon cassette comprising: a cylindrical ribbon core around which the ink ribbon is wound; and a first magnet and a second magnet each configured to generate a magnetic force line in a space of the ribbon core, wherein the ribbon core comprises a cylindrical outer core and a cylindrical inner core inserted inside the cylindrical outer core, the inner core has an outside peripheral surface to which the first and second magnets are fixed, and an inner peripheral surface for forming the space of the ribbon core so that the magnetic force line formed by the first and second magnets is generated in the space, and the outer core has an outside peripheral surface around which the ink ribbon is directly wound, and an inner peripheral surface to which the outside peripheral surface of the inner core with the first and second magnets fixed thereto is installed, the inner peripheral surface of the outer core extending along the outside peripheral surface of the inner core.