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Image-forming apparatus, image-forming method, developing apparatus, and developing method

A developing device and image technology, applied in the direction of equipment, developer, electric recording process applying charge pattern, etc., can solve the problem of difficulty in obtaining toner recyclability compatibility and the like

Active Publication Date: 2015-07-01
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] As described above, in the cleaner-less system, it is difficult to obtain compatibility between the recovery of residual toner in a low-temperature and low-humidity environment and the suppression of fogging in a high-temperature and high-humidity environment, so there is room for further improvement of the system

Method used

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  • Image-forming apparatus, image-forming method, developing apparatus, and developing method
  • Image-forming apparatus, image-forming method, developing apparatus, and developing method
  • Image-forming apparatus, image-forming method, developing apparatus, and developing method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0313] (Preparation of Substrate 2)

[0314] The prepared substrate 2 was a product obtained by applying and baking a primer (trade name: DY35-051; manufactured by Dow Corning Toray CO., LTD.) to a mandrel made of SUS304 and having a diameter of 6 mm.

[0315] (production of elastic rollers)

[0316] The previously prepared base body 2 was put into a metal mold and an addition type silicone rubber composition obtained by mixing the following materials was poured into a cavity formed in the metal mold.

[0317] Liquid silicone rubber material (trade name: SE 6724A / B; manufactured by Dow Corning Toray CO., LTD.): 100 parts by mass

[0318] Carbon black (trade name: TOKABLACK #4300; manufactured by Tokai Carbon CO., LTD.): 15 parts by mass

[0319] ・Silicon dioxide powder as a heat resistance imparting agent: 0.2 parts by mass

[0320] ・Platinum catalyst: 0.1 parts by mass

[0321] An addition-type silicone rubber composition obtained by mixing the materials shown in Table 1 ...

Embodiment 1

[0386] (image forming equipment)

[0387] A printer LBP7700C manufactured by Canon Inc. was modified and used for image output evaluation. The printer is modified as follows: The toner supply member of the developing device is modified so that the figure 2 The toner carrier is rotated in the opposite direction as shown in and the application of voltage to the toner supply member is stopped. Further, the cleaning blade was removed, and the abutment pressure was adjusted so that the width of the abutment portion between the toner carrier and the latent electrostatic image bearing member became 1.1 mm.

[0388] 100 g of the toner 1 was charged into the developing device modified as described above, and the developing device was produced by using the resultant and the toner carrier 2 . Set the produced developing device to the black position.

[0389] Next, in a high-temperature and high-humidity environment (32.5°C, 80%RH), a DC voltage was applied to the charging member so t...

Embodiment 2～22

[0412] Image Output Evaluation Each developing device was produced in the same manner as in Example 1 by using such a combination of toner and toner carrier as shown in Table 5, and was set as shown in Table 5| V1-V2| to proceed. As a result, in all the developing devices, the fogging in the high-temperature and high-humidity environment was at or above the level at which no problem occurred in actual use, and the recyclability in the low-temperature and low-humidity environment was good and no cleaner-free weight caused by poor recovery could be obtained. shadow image. Table 5 shows the evaluation results.

[0413]

[0414] Image Output Evaluation Each developing device was produced in the same manner as in Example 1 by using such a combination of toner and toner carrier as shown in Table 5, and was set as shown in Table 5| V1-V2| to proceed. As a result, in each of the entire developing devices, fogging in a high-temperature and high-humidity environment and recyclabili...

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PUM

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Abstract

Provided is a developing apparatus, including toner for developing an electrostatic latent image, a toner carrier for carrying the toner, and a regulating member for regulating a layer thickness of the toner carried by the toner carrier. The toner carrier is placed to be brought into contact with the electrostatic latent image bearing member. The toner carrier includes a substrate, an elastic layer, and a surface layer containing a urethane resin. The urethane resin has a partial structure derived from a reaction between a compound represented by the structural formula (1) and a polyisocyanate. The toner contains toner particles each containing a binder resin and a magnetic material, and inorganic fine particles. The toner has a weight average particle diameter (D4) of from 9.5 μm to 14.0 μm. The toner has a porosity of 50 or more and 56 or less.

Description

technical field [0001] The present invention relates to an image forming apparatus, an image forming method, a developing apparatus, and a developing method each employing an electrophotography method. Background technique [0002] Although many methods are each known as the electrophotographic method, common methods are as follows. A latent electrostatic image is formed on a latent electrostatic image bearing body by various elements using a photoconductive substance. Next, the electrostatic latent image is developed using a toner to be converted into a visible image and the toner image is transferred to a recording medium such as paper as required. After that, the toner image is fixed onto a recording medium by heat, pressure, or the like to provide a copy. Copiers, printers, and the like can be used as such image forming apparatuses. [0003] In recent years, the transition of such printers or copiers from an analog system to a digital system has progressed, and thus e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G9/083G03G9/08
CPCG03G15/0818G03G15/0812G03G15/0808G03G9/00G03G9/0819G03G9/0825G03G9/0837G03G9/09708
Inventor 马笼道久松井崇浦谷梢大森淳彦山田真树伊藤稔
Owner CANON KK