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

Image forming apparatus

An image and contact position technology, which is applied to the electric recording process applying charge pattern, the equipment of the electric recording process applying charge pattern, electric recording technique, etc., can solve the problem of insufficient transfer efficiency and improve the transfer efficiency. Effect

Inactive Publication Date: 2010-02-24
SEIKO EPSON CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, according to this conventional example, it is true that the transfer efficiency when transferring the developer image on the photoreceptor drum 10 to the intermediate transfer belt 80 is not sufficient.

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
  • Image forming apparatus
  • Image forming apparatus
  • Image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 3

[0037] a. Common structure

[0038] First, the configuration common to the image forming apparatuses of Embodiments 1 to 3 will be briefly described. These image forming devices are so-called "monochrome machines" such as figure 1 and figure 2As shown, there are: image making section 5; intermediate transfer belt 80; first cylinder 81; second cylinder 82; first support cylinder 61; second support cylinder 62; In addition, the imaging section is arranged between the first drum 81 and the second drum 82, and has: a photosensitive drum 10, a latent image remover 6, a cleaning device 8, a charging member 11, an exposure unit 12, a developing unit 30, a photosensitive drum pressing device 70 , and a primary transfer roller 51 .

[0039] The photoreceptor drum 10 is formed in a substantially cylindrical shape (outer diameter: 80 mm) with a photosensitive layer formed on the outer peripheral surface, and its outer peripheral surface is sequentially arranged along the latent imag...

Embodiment 1 and 2

[0056] In embodiment 1 and embodiment 2, such as Figure 4 As shown in (a), the lower end 63 of the first support roller 61 is arranged below the intersection P2, and the lower end 64 of the second support roller 62 is arranged further below the lower end 63 of the first support roller 61 . Therefore, the arc-shaped nip N with respect to the straight line P1″ connecting the axial center 54 of the primary transfer roller 51 and the axial center 14 of the photoreceptor drum 10 is positioned downstream along the moving direction of the intermediate transfer belt 80 . The central angle V2 of the section on the side (that is, the downstream winding nip section B)" is larger than the "portion constituting the section located on the upstream side along the intermediate transfer belt 80 (ie, the upstream winding nip section A)". "The central angle V1.

[0057] Therefore, in Embodiment 1 and Embodiment 2, the width of the portion of the nip portion N constituting the downstream windin...

Embodiment 3

[0059] In Example 3, such as Figure 4 As shown in (b), the lower end portion 63 of the first support roller 61 is arranged at approximately the same height position as the lower end portion of the primary transfer roller 51, and the lower end portion 64 of the second support roller 62 is arranged on the first support roller 61. Below the lower end 63 of the Therefore, only the downstream winding nip section B constitutes the arcuate nip N. In other words, the central angle V1 of the portion of the nip N that constitutes the upstream winding nip section A is "zero". When specific numerical values ​​are shown, in Example 1, the upstream winding nip width is "0 mm", and the downstream winding nip width is "7 mm".

[0060] b-3. Comparative example

[0061] In order to evaluate the performance of the image forming apparatuses of Examples 1 to 3, the “image forming apparatuses of comparative examples” were also subjected to performance tests described later. In this comparative...

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 an image forming apparatus capable of improving transfer efficiency when transferring developed image of photoconductor drum onto transfer belt. The image forming apparatus includes: a photoconductor drum; a transfer belt wound around the photoconductor drum and configured to move in a first direction; and a transfer member configured to come into abutment with the photoconductor drum at an abutment position via the transfer belt, wherein the transfer belt comes into contact with the photoconductor drum at a first position and comes out of contact with the photoconductordrum at a second position, and a peripheral surface length of the photoconductor drum between the abutment position and the second position is larger than a peripheral surface length of the photoconductor drum between the first position and the abutment position.

Description

technical field [0001] The present invention relates to an image forming apparatus, and is particularly suitably applicable to an image forming apparatus using a liquid developer in which toner is dispersed in a carrier liquid. Background technique [0002] There is known an image forming apparatus including a photoreceptor drum, a transfer belt such as an intermediate transfer belt, and a transfer member (transfer roller, etc.) that contacts the photoreceptor drum via the transfer belt. As the image forming apparatus, such as Figure 5 As shown, there is disclosed a structure (see the figure in Patent Document 1, etc.) in which the transfer roller 51 is brought into contact with the upper end portion of the photoreceptor drum 10 in a state of sandwiching the intermediate transfer belt 80 , Further, winding portions 80L, 80R having substantially the same length are formed on both sides of the contact position between the transfer roller 51 and the photoreceptor drum 10 . ...

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): G03G15/00G03G15/16G03G15/01G03G15/10
CPCG03G15/1605
Inventor 上条浩一千叶悟志外山洋
Owner SEIKO EPSON CORP
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