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USPTO Class 492 Roll or roller

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  • 01/31/12--05:00: Roller device for a toner cartridge (chan 3121103)
  • A roller device for a toner cartridge includes a spindle and a roller body. The roller body has a foam layer disposed around the spindle, and an outer tube disposed around the foam layer. Both of the outer tube and the foam layer are made of a thermoplastic material. The roller body has a bulk resistance ranging from 102 ohms to 1010 ohms.