Method of using variably sized coating particles in a mono component developing system
AssigneeAetas Technology Incorporated
InventorsLawrence B Schein, Graham Galliford, Taomo Mu
Life of this patent
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Abstract
The present invention is directed to a non-contact, single-component developing system for electrophotographic machines that effectively reduces the impact of adhesion forces on the development process. The developing system of the present invention utilizes a single-component toner that tends to reduce the adhesion forces that hold the toner particles on a toner support member. Preferably, the toner is combined with large and small silica particles having a concentration by weight that results in an optimum surface coverage of toner particles by large and small silica particles that facilitates a reduction in the adhesion forces holding the toner particles on the toner support member.
Claims27
A non-contact, single-component developing system comprising:
- a photoreceptor capable of having an electrostatic latent image recorded thereon;
- and
- a toner support member disposed in opposing relationship with the photoreceptor with a gap therebetween defining a developing region, the toner support member adapted to carry a toner thereon to the developing region;
- wherein the developing region is without AC voltage and wherein the toner comprises toner mixed with large and small extraparticulate particles, a weight concentration of small extraparticlate particles resulting in a first surface coverage of the toner in a range of about 50 to 150 percent and a weight concentration of large extraparticulate particles resulting in a second surface coverage of the toner in a range of about 5 to 50 percent.
A single component toner comprising
- a plurality of toner particles;
- a first plurality of extraparticulate particles;
- and
- a second plurality of extaparticulate particles;
- wherein the first and second plurality of extraparticulate particles are mixed with the plurality of toner particles at a concentration of first plurality of extraparticulate particles resulting in a first surface coverage of the plurality of toner particles in a range of about 50 to 150 percent and a concentration of second plurality of extraparticulate particles resulting in a second surface coverage of the plurality of toner particles in a range of about 5 to 50 percent such that said single component toner is capable of working in a non-contact developing system having a developing region without AC voltage.
A non-contact single pass electrophotographic imaging process comprising the steps of
- creating a latent image on a surface of a photoreceptor, and
- developing the latent image into a developed image by forcing toner particles across a gap between a toner support member and the photoreceptor without AC voltage.
Dependencies are inferred from the claim text.