US Patent 7546062 Methods and apparatus for remanufacturing toner cartridges

A method of removing a drum from a printer toner cartridge, the drum having a cylindrical body, the drum further having a pair of drum gears attached to each end of the drum, each drum gear being configured to attach the drum to the printer, at least one drum gear having a cylindrical body, the cylindrical body defining a hollow drum gear interior, at least one drum gear further having a drum gear wall that is positioned perpendicular to the cylindrical body and configured to cover the hollow drum gear interior, the method including the steps of creating a hole through the drum gear wall and inserting a cutting device through the hollow drum gear interior.