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Toner box

A toner cartridge and toner technology, applied in the field of toner cartridges, can solve problems such as defects, toner clogging, image quality, etc., to promote flow, reduce residual toner amount, and improve toner transfer performance Effect

Active Publication Date: 2008-11-12
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this, agglomerates of toner particles may be supplied from the toner cartridge to the developing device of the image forming apparatus, thereby easily causing toner clogging and causing defects in image quality, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0161] Hereinafter, the present invention will be explained based on examples. Meanwhile, the present invention is not limited to these examples. In addition, "parts" in the following examples mean "parts by weight".

[0162] (1) Preparation of toner

manufacture example 1

[0164] 88 parts of polyester resin (polyester obtained from terephthalic acid, bisphenol A-ethylene oxide adduct and trimellitic anhydride: glass softening temperature 62°C, number average molecular weight 5,320, weight average molecular weight 24,500 , acid value 17, hydroxyl value 33), 7 parts of polyethylene wax (Polywax725: manufactured by Toyo-Petrolite Co., Ltd., DSC endothermic peak 102 ° C) and 5 parts of black pigment (carbon black #25B: manufactured by Mitsubishi Chemical Company Manufacture) Various ingredients are added and initially mixed, then kneaded using an extruder, and then the mixture is pulverized using a jet mill.

[0165] Then, the pulverized product was classified using a Coanda effect type classifier to obtain a classified product having a volume median particle diameter of 6.5 μm and 20 percent of the particles were not larger than 4 μm. 0.1 parts by weight of a hydrophobic titanium oxide compound and 1.2 parts by weight of silica treated with silicon...

manufacture example 2

[0167] A graded product having a volume median particle diameter of 6.5 μm was obtained by the same manufacturing method as in Manufacturing Example 1, and then the addition amount of silicon oil-treated silica as an external additive was changed to 0.8 parts by weight and the addition amount of the titanium compound was changed to 0.2 parts by weight to obtain Toner B. Toner B has a compression ratio of 0.38 and a shape factor SF of 142.

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PUM

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Abstract

The toner cartridge is provided with: a toner storing container of a rectangular shape having a toner feeding opening in an angular portion thereof; and a stirring conveying member that is rotatably disposed inside the toner storing container in a predetermined rotation direction and that stirs and conveys toner toward the toner feeding opening in the toner storing container. Compression ratio defined by the following equation (1) of the toner stored in the toner storing container is 0.25 to 0.38,Compression ratio=(P-A) / P (1) (Provided that in the equation (1), P represents a packed bulk density of toner and A represents an aerated bulk density of toner.

Description

technical field [0001] The present invention relates to a toner cartridge for storing toner. Background technique [0002] As a toner cartridge used in an image forming apparatus employing an electrophotographic system such as a copying machine, a printer, etc., the used toner cartridge is configured such that the supply developer in the container is supplied to the developing device at a predetermined timing. At the same time, the waste developer including the carrier and the like that has been used and degraded in the development process is recovered. [0003] For an image forming apparatus using this toner cartridge, there is described in Unexamined Japanese Patent Application Publication No. 2003-043795 a powder toner supply method in which a toner container is filled with The toner has a circularity of 0.95 to 0.99 and a cohesiveness of 20% to 50%. [0004] In Unexamined Japanese Patent Application Publication No. 03-289687, there is described a toner replenishing dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0855G03G15/0875G03G2215/068G03G15/0865G03G15/0832
Inventor 上园勉
Owner FUJIFILM BUSINESS INNOVATION CORP
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