US Patent 7393621 Toner composition for electrophotography image forming apparatus

Patent 7393621 was granted and assigned to Samsung on July, 2008 by the United States Patent and Trademark Office.

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Patent Inventor Names

Duck-hee Lee0

Sang-deok Kim0

Seok-hoon Choi0

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Patent abstract

A toner composition for an electrophotography image forming apparatus includes toner particles and external additives. The toner particles include a colorant, a charge control agent and a release agent with binder resins. The external additives include a first silica having an opposite polarity to the toner particles, a second silica having the same polarity as the toner particles, a sodium titanate having the same polarity as the toner particles, and an aluminum oxide having the same polarity as the toner particles.

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