Unlock instant, AI-driven research and patent intelligence for your innovation.

Development device, image forming apparatus and process unit

A developing device and image technology, applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., can solve problems such as easy surfaceization, toner adhesion of developing roller, etc. , to achieve good images, suppress the reduction of image density, and improve the effect of developer supply capacity

Active Publication Date: 2013-09-18
RICOH KK
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the processing unit that achieves such a long life, the toner adhesion of the developing roller will gradually decrease due to the deterioration of the developing roller over time, or the conjunctiva where the constituent components of the toner adhere to the surface of the developing roller. decline
Therefore, in the configuration for achieving a longer life of the processing unit, when using toner with high cohesive force, the above-mentioned The problem of image density reduction is easy to superficial

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Development device, image forming apparatus and process unit
  • Development device, image forming apparatus and process unit
  • Development device, image forming apparatus and process unit

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0109]

[0110] 545 parts of polyester, 181 parts of paraffin wax, and 1450 parts of ethyl acetate were placed in a container equipped with a stirring bar and a thermometer, and the temperature was raised to 80° C. with stirring, and kept at 80° C. for 5 hours. Cool to 30°C. Next, 500 parts of the above-mentioned master batch, 100 parts of the charge control agent, and 100 parts of ethyl acetate were placed in a container, and mixed for 1 hour to obtain a raw material solution.

[0111] Transfer 1500 parts of the above-mentioned raw material solution into a container, use a bead mill (ultrafine particle dispersing pulverizer of Amax), and oxidize 0.5mm with a liquid feeding speed of 1kg / hr and a disk peripheral speed of 6m / sec. The zirconium beads were filled with 80% by volume, and the carbon black and WAX were dispersed under the conditions of 3 passes. Next, 425 parts and 230 parts of the above-mentioned polyester were added, and a bead-milling under the above-mentioned ...

Embodiment 1

[0156] In Example 1, the above-mentioned Toner 1 containing silicone oil was used. In addition, the supply roll is a roll formed by forming foamed polyurethane with an average foam cell diameter of 100 μm around the mandrel roll, the outer diameter is 13.4 mm, and the volume resistance is 3×10 4 Ω. The amount of bite of the supply roller to the developing roller was 1 mm, the contact pressure was 47 N / m, the voltage applied to the developing roller was -200V, and the voltage applied to the supply roller was -350V. That is, the potential difference between the supply roller and the developing roller was -150V.

Embodiment 2

[0158] Example 2 In Example 1, the elastic layer and outer diameter of the supply roller were changed. Specifically, the outer diameter was changed from 13.4 mm to 12.8 mm, and the average foam cell diameter was changed from 100 μm to 266 μm. In addition, with this change, the amount of bite of the supply roller to the developing roller was 0.7 mm, and the contact pressure was 30 N / m.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a development device, an image forming apparatus and a process unit. satisfactory quality can be obtained even developer with high agglomeration degree is used. The development device comprises a developer supply member (42) for supplying developer in the surface of a developer bearer (41) after the developer supply member (42) contacts teh developer bearer (41). The developer has a degree of agglomeration of 54% or greater. A biting amount of the developer supply member (42) relative to the developer bearer (41) is 0.7 mm or greater.

Description

technical field [0001] The present invention relates to a developing device, a process cartridge including the developing device, and an image forming apparatus. Background technique [0002] Electrophotographic image forming apparatuses such as copiers, printers, facsimile machines, and multi-functional peripherals thereof are provided with a developing device that visualizes a latent image formed on a photoreceptor of an image carrier. Generally, a developing device includes a developing roller on which toner as a developer is placed on the surface, and a supply roller that supplies the toner to the developing roller, and confines the toner on the developing roller to a uniform level A restricting blade etc. in the thickness of 1 (for example, refer to Patent Document 1). [0003] As a basic operation of the developing device, first, the toner contained in the developing device is triboelectrically charged by the sliding friction between the supply roller and the developi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G21/18G03G15/01
CPCG03G9/0821G03G9/09716G03G9/09725G03G15/0808G03G9/08
Inventor 长友雄司松野泰英真田贵宽中武直树宫崎贵史藤原泰宏阿部杏子宫崎瑠美山下刚司足立知哉
Owner RICOH KK
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com