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Image fixing apparatus

一种图像定影、未定影的技术，应用在应用电荷图形的电记录工艺、应用电荷图形的电记录工艺的设备、电记录术等方向，能够解决降低织物清洁性能等问题

Active Publication Date: 2010-09-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the vicinity of the cleaning nip portion after the heating is stopped, the toner component in the surface layer fabric in contact with the fixing rotary member is in a state of high fluidity, so that the toner component penetrates into the lower unused cleaning fabric medium, thus reducing the cleaning performance of the fabric

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Structure of the cleaning unit

[0033] image 3 is a sectional view showing the cleaning unit 6 of the image fixing device 10 according to Embodiment 1. The cleaning unit 6 includes: a fabric 6a; a supply roller 6b as a rotating member on which an unused portion for cleaning of the fabric 6a is wound (rolled) in advance; and a winding roller 6c as a rotating member Used portion for winding fabric 6a cleaning. For easy replacement, the supply roller 6b, the winding roller 6c, and the fabric 6a are integrally supported by the frame member 6e to constitute a cleaning unit.

[0034] The fabric 6a is formed by curing fibers made of PPS resin into a thin cloth shape by calendering, and has a thickness of 40 μm, dimensions of length×width=2m×224mm, and 40g / m 2 The weight (the weight used per unit area). As the material of the fabric 6a, besides PPS, a fiber made of one of polyester resin, aramid resin, and rayon adjusted to have a thickness of 20 to 60 g / m can be used. 2...

Embodiment 2

[0066] Such as Figure 11 As shown, the cleaning unit 6 of the image fixing device 10 of this embodiment has a structure in which a winding roller 6c is brought into contact with the pressure roller 3 instead of the supply roller 6b to form a cleaning nip N2. That is, during cleaning, the winding roller 6c moves to the cleaning position, and during non-cleaning, the winding roller 6c moves to the waiting position, and other features are the same as those in Embodiment 1, thereby omitting the a detailed description of .

[0067] In this embodiment, the winding roller 6c is driven by the motor M2 via the idle gear G in the direction of the dotted arrow. During separation, power transmission to the winding roller 6c and the idler gear G is blocked.

[0068] In the case where the wind-up roll is also used as the contact roll in this embodiment, when the wind-up roll is always in contact to form the cleaning nip N2, the toner components are removed from the fabric 6a wound on the...

Embodiment 3

[0077] Next, another embodiment different from Embodiments 1 and 2 will be described. Therefore, descriptions of common parts of Embodiments 1 and 2 will be omitted. In order to improve the cleaning performance of the cleaning unit 6 of the image fixing device 10 of this embodiment, the cleaning nip portion N2 is elongated in the winding direction of the web 6a.

[0078] exist Figure 12A Among them, the cleaning unit 6 is configured to wind the fabric 6A on the winding roller 6c from the supply roller 6b via the fabric winding member 6d. In this embodiment, the supply roller 6b and the web winding member 6d are moved to the cleaning position during cleaning, and are moved to the waiting position during non-cleaning. In this embodiment, the movement to the waiting position is performed by rotating the separation cam 6f during separation and rotating the cleaning unit 6 to the state shown by the dotted line in the drawing in Embodiment 1. According to this embodiment, the to...

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PUM

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Abstract

An image fixing apparatus for fixing an unfixed toner image formed on a recording medium, includes a fixing rotation member that forms a fixing nip portion through which the recording medium passes, and a roller having a peripheral surface around which the web is wound, the roller forming a cleaning nip portion for cleaning the fixing rotation member with the web by pressing a portion on which a web is winded up, against the fixing rotation member, wherein a used portion for cleaning of the web moves from the cleaning nip portion by rotation of the roller, and wherein during non-cleaning in which the web does not clean the fixing rotation member, said roller leaves the fixing rotation member further than a position of during cleaning so that the web separates from the fixing rotation member. An object of the invention is to provide an image fixing apparatus for preventing the degradation of a cleaning ability of a web due to a toner component held by a used portion for cleaning of the web.

Description

technical field [0001] The present invention relates to an image fixing device for fixing a toner image to a recording medium by heating the recording medium and toner thereon. Background technique [0002] In an image fixing device installed in a copier or a printer employing electrophotographic recording technology, due to toner components that are not fixed to a recording medium, the fixing rotary member for forming the fixing nip portion of the image fixing device get dirty. Therefore, there have been employed devices for cleaning the fixing rotary member by wiping off the toner components adhered to the peripheral surface of the fixing rotary member with a cloth by bringing the cloth into contact with the peripheral surface of the fixing rotary member. [0003] In Japanese Patent Application Publication No. H08-220921, an image fixing device is described that stretches a fabric (cleaning fabric 16) wound around a supply roller (supply roller 25) via a winding roller (s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G21/00
CPCG03G15/2075G03G15/2025
Inventor 七泷秀夫高木健二三桥庆辅山口理知远藤昭孝
Owner CANON KK