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Property of Toner Layer on Developing Roller for Mono-Component Developing System

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Property of toner layer on a developing roller for monocomponent developing system has been investigated using a compact draw-off type instrument that measures toner charge and toner mass amount. The developing unit consists of a developing roller made of aluminum, a toner supply roller, and a blade, which controls the mass amount and the tribocharge of toner applied on the developing roller. The toner consists of polyester resin particles, which includes color agent, charge control agent, and external additives of silica. The charge measurement of toner on the developing roller is performed by directly absorbing toner particles with the absorption nozzle of the instrument. The toner mass amount on the roller surface is obtained simultaneously from the amount of toner absorbed into the absorption nozzle. The pushing pressure of the blade on the developing roller, the surface roughness of the roller, and external additives on toner surface affect the toner mass amount of the toner layer on the roller as well as the charge amount of the toner layer. It is found in this study that the charge to area ratio, which is a product of the toner charge and the toner mass amount on the developing roller, is very important to determine charging properties of toner particles.

Document Type: Research Article

Publication date: 2005-01-01

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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