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Image forming device

An imaging device and a latent image technology, which are applied in the equipment, electrographic, optical, etc. of the electric recording process applying the charge pattern, to achieve the effects of improving the fluidity, suppressing the image deterioration, and uniforming the toner charge.

Inactive Publication Date: 2013-03-20
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, toner components such as external additives on the surface of the image holding member that have not been removed by the cleaning device may adhere to the surface of the charging roller.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0126] For the preparation of toner mother particles, known wet methods and dry methods can be used. For example, the following methods can be used: a mixing pulverization method in which a binder resin, a colorant and, if necessary, a release agent, a charge control agent, etc. are mixed, pulverized, and classified; A method in the shape of particles; an emulsion polymerization method in which a polymerizable monomer for providing a binder resin is emulsion-polymerized, and the resulting dispersion is mixed with a dispersion in which a coloring agent is dispersed and a release agent and One or more optional dispersions of a charge control agent etc. are mixed and then heated to cause them to aggregate and fuse to obtain a toner; a suspension polymerization method in which a polymerizable monomer for obtaining a binder resin is combined with a colorant and a solution of a release agent and a charge control agent, etc., if necessary, suspended in an aqueous solvent, and polymer...

Embodiment approach

[0226] For the present exemplary embodiment, the "interconnected cell structure" refers to a structure in which a plurality of cells is contained and adjacent gas cells are connected to each other.

[0227] In addition, for the present exemplary embodiment, "hardness" is measured by the following method. The material constituting the porous layer 16B was cut into a sheet of 400 mm high x 400 mm wide x 50 mm thick, and a load was applied to the central portion of the sliced ​​sheet using a compression jig with a diameter of 200 mm. The force required to compress the thickness by 25% is taken as hardness in the present invention. The force required for compression was measured using a load measuring instrument (MODEL-1311) manufactured by AIKOH.

[0228] The hardness of the porous layer 16B may be 150N-500N, preferably 170N-450N, more preferably 190N-400N. When the hardness is within these ranges, the cleaning roller 16 has sufficient cleaning ability, and inorganic particle a...

Embodiment 1

[0278] Production of Toner A

[0279] ~Preparation of Resin Microparticle Dispersion~

[0280] ·Styrene 296 parts

[0281] · 104 parts of n-butyl acrylate

[0282] · Acrylic acid 6 parts

[0283] · 10 parts of dodecyl mercaptan

[0284] 1.6 parts of divinyl adipate

[0285] (The above are manufactured by Wako Pure Chemical Industries, Ltd.)

[0286] The mixture mixed and dissolved with the above components was added to a mixture consisting of 12 parts of nonionic surfactant (NONIPOL 400, manufactured by Sanyo Chemical Industry Co., Ltd.) and 8 parts of anionic surfactant (NEOGEN SC, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd. Manufacture) was dissolved in a solution obtained by dissolving 610 parts of ion-exchanged water. It was then dispersed and emulsified in the flask. While mixing slowly for 10 minutes, 50 parts of ion-exchanged water in which 8 parts of ammonium persulfate (manufactured by Wako Pure Chemical Industries, Ltd.) was dissolved was added. Th...

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PUM

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Abstract

An image forming device including: an image holding member; a charging member; a latent image-forming unit; a developing unit that develops the electrostatic latent image formed on the image holding member with a developer including a toner and a carrier, the toner comprising an external additive having first inorganic particles with a volume average particle diameter of 80 nm to 300 nm, and the carrier including a core material having a magnetic powder dispersed in a resin and a resin covering layer that covers the core material; a transfer unit; a removal unit; and an aggregation-forming unit that, by contacting a surface of the charging member and rotating in accordance with rotation of the charging member, removes adherents on the surface of the charging member, including the first inorganic particles, from the surface of the charging member, and forms aggregations in which the removed first inorganic particles are aggregated.

Description

technical field [0001] The present invention relates to an imaging device. Background technique [0002] Image forming apparatuses using electrophotographic systems are known. In such an image forming apparatus, the surface of an image holding member such as a photoreceptor for holding an electrostatic latent image is charged by an electrostatic charging device, and an electrostatic latent image is formed on the charged image holding member. Then, the electrostatic latent image is developed with a developer, thereby forming a toner image on the image holding member. The toner image formed on the image holding member is transferred onto a recording medium (directly onto the recording medium, or via a transfer roller), and then fixed onto the recording medium. Attachments such as residual toner and paper dust on the image holding member are removed by a cleaning device. [0003] For the charging of the image holding member by the charging device, in order to suppress the am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/00G03G21/00G03G15/02G03G9/087G03G9/08
CPCG03G15/0225
Inventor 井上敏司高木正博吉原宏太郎井口萌木
Owner FUJIFILM BUSINESS INNOVATION CORP
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