Patent ID: 8105222

Claim:
A roller device for a toner cartridge, comprising: a spindle; and a roller body having a foam layer disposed around said spindle, and an outer tube disposed around said foam layer, both of said outer tube and said foam layer being made of a thermoplastic material, said roller body having an overall resistance ranging from 10 2 ohms to 10 10 ohms; wherein said roller body further has an inner tube disposed between said spindle and said foam layer, said inner tube, said outer tube and said foam layer being made of the same thermoplastic material which is selected from the group consisting of thermoplastic polyurethane and a copolymer of the thermoplastic polyurethane; and wherein said inner tube has an inner periphery provided with an internal thread, and said spindle has an outer periphery provided with an external thread to engage said internal thread.