Check patentability & draft patents in minutes with Patsnap Eureka AI!

Electrophotographic member, process cartridge and electrophotography device

一种电子照相、构件的技术，应用在应用电荷图形的电记录工艺的设备、电气元件、电晕放电装置等方向，能够解决充电构件微小电阻不均、充电不均、污染等问题，达到抑制充电不均、改进从动旋转性的效果

Active Publication Date: 2015-08-26
CANON KK
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the case of using a charging roller in a contact charging system, there is a problem in which a stripe-shaped charging uneven image is liable to be formed due to minute resistance unevenness of the charging member and contamination of toner and external additives on the surface of the charging member question

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
  • Electrophotographic member, process cartridge and electrophotography device
  • Electrophotographic member, process cartridge and electrophotography device
  • Electrophotographic member, process cartridge and electrophotography device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0213] (conductive substrate)

[0214] A thermosetting adhesive containing 10% by mass of carbon black was applied onto a substrate made of stainless steel having a diameter of 6 mm and a length of 252.5 mm and dried. The resulting substrate was used as a conductive substrate.

[0215] (conductive elastic layer)

[0216] By using an extruder equipped with a crosshead, the conductive substrate as the central axis was coaxially and cylindrically covered with the unvulcanized rubber composition R-1 produced in Production Example 42 to obtain mm outer diameter prefabricated body (preform).

[0217] The preform was heated and vulcanized at 160° C. for 1 hour in a hot air oven to form a conductive elastic layer on the outer periphery of the conductive substrate. An end portion of the conductive elastic layer was removed to obtain a roller having a conductive elastic layer having a length of 224.2 mm.

[0218] Then, the outer peripheral surface of the conductive elastic layer was...

Embodiment 2 to 47

[0231] The type of each unvulcanized rubber composition and the type of each surface layer coating liquid were changed as shown in Table 11. Further, each coating liquid for a surface layer was dried after coating under the conditions shown in Table 10.

[0232] Table 10

[0233]

[0234] Charging rollers T-2 to T-47 were produced in the same manner as in Example 1 except for the foregoing. Table 12 and Table 13 show the evaluation results.

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
heightaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

Provided is an electrophotographic member for an electrophotographic apparatus, which suppresses the occurrence of a banding image caused by uneven charging. The electrophotographic member includes: an electroconductive substrate; and a surface layer, in which: the surface layer includes a binder resin and an aggregate of at least one crystal particle selected from the group consisting of a flaky crystal particle of magnesium carbonate and a flaky crystal particle of calcium carbonate; an edge face of a card house structure formed of the crystal particle is exposed at a surface of the aggregate; a surface of the surface layer includes a convex portion derived from the aggregate; and a surface of the convex portion has unevenness reflecting a shape of the edge face of the card house structure exposed at the surface of the aggregate.

Description

technical field [0001] The present invention relates to a member for electrophotography, a process cartridge, and an electrophotographic apparatus. Background technique [0002] An electrophotographic apparatus employing an electrophotographic system mainly includes an electrophotographic photosensitive member, a charging device, an exposure device, a developing device, a transfer device, and a fixing device. The charging device employs a system that charges the surface of the electrophotographic photosensitive member by applying a voltage (direct voltage alone or direct voltage superimposed on an alternating voltage) to a charging member disposed in contact with or close to the surface of the electrophotographic photosensitive member. From the viewpoint of stably performing charging and reducing the generation of ozone, a contact charging system for charging with a charging member in contact with the surface of the electrophotographic photosensitive member has been preferab...

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): G03G15/02G03G21/18
CPCG03G15/0233G03G5/04G03G21/18G03G21/1814
Inventor 青山雄彦谷口智士山内健一
Owner CANON 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