DEVELOPMENT ROLLER, TONER AND IMAGE FORMATION APPARATUS

• Main Authors: YASUNAGA HIDEAKI, MATSUSHITA MAKOTO, SHIGESATO KEIICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 06.10.2016
• Subjects: BEARINGS; BLASTING; CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOLOGRAPHY; LIGHTING; MAGNETOGRAPHY; MECHANICAL ENGINEERING; PHOTOGRAPHY; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a development roller capable of achieving suppression of both regulation blade fastening and filming even when a toner having excellent low-temperature fixability is used to achieve high speed and long life.SOLUTION: A development roller includes a conductive shaft body, a conductive elastic layer formed on a circumference of the conductive shaft body, and a toner carrier layer formed on a circumference of the conductive elastic layer. The toner carrier layer has particles with an average particle diameter of 11-40 nm dispersed on a surface thereof. The development roller has running torque of 2.5-3.5 N.SELECTED DRAWING: Figure 1 【課題】低温定着性に富んだトナーを用いて高速・長寿命化を行っても、規制ブレード固着とフィルミングの抑制を両立させることができる現像ローラを提供する。【解決手段】導電性軸体と、該導電性軸体の外周に形成された導電性弾性層と、該導電性弾性層の外周に形成されたトナー担持層と、を有する現像ローラであって、前記トナー担持層は、表面に平均粒径１１〜４０ｎｍの粒子が分散されており、前記現像ローラの回転トルクが２．５〜３．５Ｎであることを特徴とする現像ローラ。【選択図】図１