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Fixing device and image forming apparatus

A technology for fixing parts and means, applied in the fields of electric recording process using charge pattern, equipment for electric recording process using charge pattern, and electrography, etc., which can solve problems such as clogging, inability to carry out smooth transportation, and reduced quality of printed matter

Active Publication Date: 2011-09-21
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The rib-like irregularities of the recording material P that appear in this way lead to a decrease in the quality of printed matter after image formation
In addition, when a post-processing device is connected to the image forming device, there is figure 1 The recording material P with rib-shaped unevenness shown in the figure cannot be transported smoothly in the post-processing device, and it is easy to cause poor transport such as jamming

Method used

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  • Fixing device and image forming apparatus
  • Fixing device and image forming apparatus
  • Fixing device and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] like image 3 As shown, the fixing device 7 according to Embodiment 1 of the present invention includes: a fixing belt 71 as a fixing member; a lower pressure roller 72 as a pressure member; a heating roller 73 ; a heater 74 ; and an upper pressure roller 75 .

[0047]The fixing belt 71 is composed of an endless transmission belt in which an elastic layer such as silica gel is formed on a heat-resistant film substrate such as PI (polyimide), and a PFA (polytetrafluoroethylene-perfluoroalkyl vinyl ether) layer is further formed thereon. ), PTFE (polytetrafluoroethylene) and other fluororesin release surface layers. The lower pressure roller 72 and the upper pressure roller 75 are composed of rollers. These rollers form a silicone elastic layer on the metal tube base, and form a fluororesin release surface layer such as PFA or PTFE on the elastic layer. The lower pressure roller 72 forms a fixing nip NP that brings the recording material into contact with the fixing belt...

Embodiment 1

[0093] Device structure: image 3 The shown fixing device specifically has the following structure.

[0094] Heating roller 73: Outer diameter 90mm, PTFE coating (built-in heater: 1200W×2,750W×2,500W)

[0095] Upper pressure roller 75: outer diameter 90mm, 17mm thick silicone (10°JISA), surface layer PTFE coating

[0096] Lower pressure roller 72: outer diameter 90mm, 2mm thick silicone (10°JISA), surface layer 30μm thick PFA sleeve (built-in heater: 700W)

[0097] Fixing belt 71: outer diameter 168mm, 70μm thick polyimide base, 200μm thick silicone (15°JISA), 30μm thick PFA sleeve

[0098] Fixing load: 2000N Belt tension: 250N

[0099] Fixing belt control temperature: 160~200℃

[0100] Lower pressure roller control temperature: 80~120℃

[0101] Speed: 500mm / s

[0102] Separation claw 77: base material PI, surface layer PFA coating.

[0103] Tip shape: R 0.05 or less, tip width WD 12mm

[0104] Number: 7

[0105] Claw tip position: Set the claw tip at 12mm fro...

Embodiment 2

[0117] Adopted Figure 7 The shown fixing unit, that is, the fixing unit 7 is equipped with an air separation device 76 and an air separation device 78 .

[0118] The nozzles of the air separation unit 78: 1mm×65(5mm pitch)

[0119] Compressor: 0.75kW 0.8MPa 0.00125m 3 / s

[0120] (reciprocating / no oil supply type) accumulator tank capacity 0.05m 3

[0121] Direct acting solenoid valve: capacity 0.001m 3 / s(100kPa)×2

[0122] Response speed: ~20ms

[0123] Air spitting time: about 50ms (A4 horizontal 100ppm each passing time: 600ms)

[0124] Others Image formation and fixing were carried out under the same conditions as in Example 1.

[0125] As a result, the fixing progressed well, and the recording material after the fixing treatment had no streak-like unevenness.

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Abstract

The present invention relates to a fixing device and an image forming apparatus, wherein, a tip of the separation claw contacts the pressure member at a position which is downstream, in a direction of movement of a surface of the pressure member, of a peak of an air blast pressure distribution on a surface of the pressure member.

Description

technical field [0001] The present invention relates to an electrophotographic image forming apparatus, and more particularly to a fixing apparatus for fixing toner images. Background technique [0002] In the fixing device of the electrophotographic image forming apparatus, separation claws and air separation means are used as separating means for separating the recording material from the fixing member after fixing. As an example of such separating means, Japanese Unexamined Application Publication No. 63-140571 proposes to separate the recording material from the fixing member by first separating means consisting of separating claws, and to provide a second separating means to assist the separation of the first separating means. As the second separation means, air separation means was used. [0003] In separation by the separation claw, there is a problem that the fixing member is scratched by the separation claw. Even if air separation is used together as described in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/2085G03G15/2028
Inventor 山本浩二船曳宏史村上正典奥野仁树
Owner KONICA MINOLTA BUSINESS TECH INC
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