JP2002236427A - Image recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a release agent supply device capable of preventing the decrease of oil supply amount caused by the clogging of non-woven fabric for coating and the soiling of a recording medium caused by the slipping-through of the toner from occurring because toner offset amount becomes large when the oil supply amount is small. SOLUTION: This image recorder is provided with a pressing means on the back surface of the half part on the upstream side of the non-woven fabric for coating in the rotating direction of the fixing roller at the abutting part of the fixing roller on the non-woven fabric so as to check a foreign matter on the upstream side of the non-woven fabric in the rotating direction of the fixing roller, whereby the decrease of the oil supply amount due to the increase of the number of printed sheets caused by the clogging of the non-woven fabric is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus for performing printing on a recording medium such as paper or OHP sheet.

[0002]

2. Description of the Related Art In a conventional image recording apparatus, in order to improve the releasability of a toner from a fixing roller of a fixing device for fixing an unfixed toner held on a recording medium based on image data, a fixing device is used. Is provided with a release agent supply means for supplying a release agent (hereinafter, referred to as oil). As the release agent supply means, for example, as described in JP-A-5-127556, a method of providing a porous body having a high release property with respect to the toner on the surface of the non-woven fabric of the oil applied portion, ,
As disclosed in Japanese Patent Application Laid-Open No. H11-84928, a method of directly contacting a non-woven fabric as an oil application portion is known.

Among them, Japanese Patent Application Laid-Open No. 5-127556 makes it difficult for toner adhered to a fixing roller to adhere to the surface of an oil application section, thereby preventing a decrease in oil supply amount due to clogging of an oil application section.

Further, Japanese Patent Application Laid-Open No. 11-84928 discloses that
Although there is an advantage that a large amount of oil can be applied to the fixing roller because the porous body is not provided, there is disclosed a configuration in which the nonwoven fabric in contact with the fixing roller can be replaced because foreign matter is easily taken in.

[0005]

In the above-mentioned prior art, Japanese Patent Application Laid-Open No. 5-127556 discloses a problem that foreign matter easily slips on the surface of the porous body, so that the slipped toner adheres to the recording medium and the image is easily stained. There is.

On the other hand, Japanese Patent Application Laid-Open No. 11-84958 of the prior art
In Japanese Patent Application Laid-Open Publication No. H08-158, foreign matter easily accumulates and clogs the nonwoven fabric, so if the nonwoven fabric is not replaced regularly, the amount of oil supply decreases, and toner (offset toner) adheres to the fixing roller due to a decrease in the releasability of the fixing roller. The amount increases,
As a result, there is a problem that the toner is worn out and adheres to the recording medium, and the image is stained.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image recording apparatus in which the oil supply amount does not decrease even when the number of prints increases, so that the image is hardly stained without replacing the nonwoven fabric. .

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing device for fusing and fixing an unfixed toner image on a recording medium, a release agent to be applied to a fixing roller of the fixing device, and a release agent for the release agent. In an image recording apparatus provided with a release agent supply device for sucking up from the agent pool with a wick nonwoven fabric and applying it to the fixing roller with a coating nonwoven fabric placed in contact with the wick nonwoven fabric, the coating nonwoven fabric is pressed against the fixing roller. A pressurizing means, and a release agent supply device provided via the wick nonwoven fabric on the rear surface within an upstream half of a contact portion between the coating nonwoven fabric and the fixing roller with respect to the rotation direction of the fixing roller. Is achieved by

Further, the present invention is achieved by providing a release agent supply device in which an upstream end of the nonwoven fabric for application is in contact with the fixing roller in the rotation direction of the fixing roller.

The pressing means for the non-woven fabric for application is held via a wick non-woven fabric provided on the back surface of the non-woven fabric for application, and a holding tool having an obtuse bent portion as viewed from the fixing roller is provided with a pressing force applying means. This is achieved by providing a release agent supply device constituted by the means.

In addition, a release agent is provided between the wick nonwoven fabric and the coating nonwoven fabric, a perforated partition plate connected to the holder, and an oil delivery nonwoven fabric provided in a hole of the perforated partition plate. This is achieved by providing a supply device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a fixing device having a release agent supply device of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a fixing device. The fixing device includes a fixing roller 2 having a rubber layer (not shown) made of, for example, silicon rubber on a surface around a metal core (not shown) containing a heater (not shown). The pressure rollers 3 are arranged so as to be pressed against each other. Reference numeral 4 denotes a rotary cleaning member. Reference numeral 5 denotes a release agent supply device. 6 is
It is a nonwoven fabric for applying a release agent. 7 is a wick nonwoven fabric. 8 is a holder. 9 is a pressing force applying means. Reference numeral 10 denotes a cleaning member. 11 is an oil bottle. 12 is a blade. 13 is an oil reservoir. Reference numeral 14 denotes a pressure roller cleaning member. Reference numeral 15 denotes the pressing force of the pressing unit shown in FIG.
A recording medium 16 is a film such as paper or plastic. Reference numeral 17 denotes an unfixed toner. Reference numeral 18 denotes a fixing toner. 19 is paper powder. Reference numeral 20 denotes an offset toner. Reference numeral 21 denotes an oil serving as a release agent.

In such an image recording apparatus, while the recording medium 16 holding the unfixed toner 17 passes therethrough, heat is transmitted to the flat portion (nip portion) formed between the rubber layers, and the unfixed toner 17 Fixing on the recording medium 16 is performed (fixing toner 18).

In such a fixing device, the unfixed toner 1
If the adhesive force to the fixing roller is larger than the adhesive force to the paper of No. 7, the toner 17 adheres to the surface of the fixing roller 2 as the offset toner 20, and if the amount increases, the recording medium 1
6 may be wound around the fixing roller 2. In order to avoid this, the oil 21 is supplied to the surface of the fixing roller 2 from the release agent supplying device 5 to reduce the adhesive force between the toner and the fixing roller.

The fixing roller 2 has an offset toner 20
In addition, foreign matter such as paper dust 19 of the recording medium 16 adheres. When the fixing roller 2 to which a large amount of the offset toner 20 locally adheres rotates, the toner adheres to the recording medium 16 and stains occur. To prevent this, the surface of the fixing roller 2 is cleaned by attaching the offset toner 20 to the surface of the rotary cleaning member 4 having a lower toner releasability than the fixing roller 2. The release agent supply device 5 that supplies oil to the fixing roller presses the nonwoven fabric for application 6 against the fixing roller 2 to block foreign substances.

Next, the release agent supply device 5 of the present invention will be described. Oil is supplied from the oil bottle 11 to the oil reservoir 13, and the oil 21 accumulates at the bottom. The oil 21 penetrates through the gaps between the fibers of the wick nonwoven fabric 7 by capillary action and applies the oil to the fixing roller 2 via the nonwoven fabric 6 for application. A holder 8 is provided on the back surface of the wick nonwoven fabric 7, and a pressing force applying means 9 such as a leaf spring is provided behind the wick nonwoven fabric 7 in order to ensure the contact of the coating nonwoven fabric 6 with the fixing roller 2. The holder 8 has the function of causing the nonwoven fabrics 6 and 7 to follow the shape thereof, and the holder 8 and the pressing force applying means 9 constitute a pressing means 10 for pressing the nonwoven fabric 6 for application onto the fixing roller 2. The oil applied to the fixing roller 2 from the application nonwoven fabric 6 passes through the blade 12, and has a predetermined liquid film thickness in the axial direction on the fixing roller 2, and is applied to the recording medium 16.

Here, if the oil supply amount supplied from the application nonwoven fabric 6 is sufficiently larger than a predetermined oil application amount after passing through the blade, the offset toner amount is small. However, when the oil supply amount drops below the predetermined oil application amount due to clogging of the application nonwoven fabric, the fixing roller 2
Because the amount of oil applied to the oil falls below a predetermined value,
There is a possibility that the toner releasing property of the fixing roller decreases, the amount of the offset toner increases, and the offset toner partially slips between the nonwoven fabric for application and the fixing roller, transfers to the recording medium, and generates stains.

In such a fixing device, a first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, in the release agent supply device of the present invention, the pressing position of the application non-woven fabric of the pressing means for preventing the oil supply amount from decreasing by improving the blocking of foreign matters is shown in FIG. Such a configuration is provided in a half portion on the upstream side in the rotation direction of the fixing roller.

Referring to FIG. 2, a non-woven fabric 6 for application which is bent substantially at the center (bending angle θ) following the shape of the holder will be described as an example. Assuming that a pressing force 15 (F) by the pressing means 10 shown in FIG. 1 acts on a certain portion of the coating nonwoven fabric 6, the coating nonwoven fabric 6 shown in FIG. Make contact at two points (in FIG. 2, distances from the bent portion to each contact point are a and b). The reaction force at that point is R ₁ , R _2, and the distance from the bent portion to the pressing force applied position when the pressing force applied position is above the bent portion (upstream in the fixing roller rotation direction) is 2ax (x ≧ x 0) and the distance from the bent portion to the pressing force acting position when the pressing force acting position is below the bent portion is 2bx (x <0), the reaction forces R ₁ and R ₂ are as follows: Is shown. When x ≧ 0 (when the position where the pressing force acts from the bent portion is on the upstream side in the fixing roller rotation direction)

[0020]

(Equation 1)

[0021]

(Equation 2)

When x <0 (when the pressing force acting position from the bent portion is on the downstream side in the fixing roller rotation direction)

[0023]

(Equation 3)

[0024]

(Equation 4)

FIG. 3 shows the relationship between the ratio R ₁ / R _{2 of the} reaction forces R ₁ and R ₂ and the pressing force acting position x (calculation example of a = b, θ = 20 °). From this, when x> 0, R ₁ > R _{2 and} the upper part of the coating nonwoven fabric 6 comes into contact with the fixing roller 2 more strongly than the lower part.
FIG. 4 shows the reaction force ratio R ₁ / R ₂ and the oil supply amount before and after printing 100,000 sheets by the fixing device. From these facts, the initial oil supply does not greatly differ from the reaction force ratio, but in the oil supply after printing 100,000 sheets, R ₁ > R _{2 has} a larger oil supply than R ₁ ≦ R _2. it can. This is because the amount of foreign matter entering the non-woven fabric 6 for application is reduced by strongly pressing the non-woven fabric 6 for coating on the upstream side in the rotation direction of the fixing roller 2, thereby reducing clogging. From this, it is effective that the pressing position of the application nonwoven fabric 6 by the pressing means 10 is upstream of the contact portion of the application nonwoven fabric 6 with the fixing roller 2 in the rotation direction of the fixing roller 2. This is a first embodiment of the present invention. Further, in this configuration, by configuring the non-woven fabric for application to be in contact with the fixing roller at the upstream end in the rotation direction of the fixing roller, it is possible to enhance the foreign matter damping ability.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the nip width (see FIG. 5) corresponding to the contact area between the coating nonwoven fabric 6 and the fixing roller 2, which is an effective factor for increasing the oil supply amount, in the release agent supply device of the present invention. The present invention relates to a coating non-woven fabric holding structure that focuses on increasing the number of non-woven fabrics.

In FIG. 5, the holder 8 provided on the back of the wick non-woven fabric 7 is configured to push the non-woven fabric on a straight surface. In this configuration, the coating nonwoven fabric 6
However, it is difficult to make the nip width h large because the sheet contacts the fixing roller 2 in a plane.

FIG. 6 shows the relationship between the nip width and the oil supply amount. In FIG. 6, when the nip width is large, a large oil supply amount can be obtained. Therefore, a structure for holding the coating nonwoven fabric having a large nip width is effective, and a structure for bending the holder 8 so as to follow the fixing roller is effective. FIG.
Has a configuration in which the holder 8 is bent at an obtuse angle when viewed from the fixing roller side at one location, and the nip width is larger than that of the configuration in FIG. FIG. 8 shows a configuration in which the holder 8 is bent at an obtuse angle when viewed from the fixing roller side at two points, and the nip width is further increased as compared with FIG. With such a configuration, the nip width between the coating nonwoven fabric 6 and the fixing roller 2 can be increased, the oil supply amount at the initial stage and when the number of printed sheets increases, and the releasability of the toner from the fixing roller increases. Can be secured.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. This embodiment describes a configuration for further improving the oil supply performance after printing a large number of sheets in the release agent supply device for an image forming and fixing apparatus according to the first embodiment of the present invention. The first embodiment of the present invention, as shown in FIG.
Since the upper portion of the non-woven fabric 6 for application strongly contacts the fixing roller 2, after printing a large number of sheets, the non-woven fabric 6 is pressed by the coating non-woven fabric 7, the wick non-woven fabric 7 is crushed in the thickness direction, the oil supply amount is reduced, and the toner is fixed. A decrease in the releasability of the roller 2 was observed.

FIG. 1 shows the relationship between the thickness of the wick nonwoven fabric 7 and the amount of oil supply (oil absorption per unit time).
0, which is almost proportional. This is because the thick wick nonwoven fabric has a larger cross-sectional area in proportion to the thickness, and therefore the oil supply amount is substantially represented by the product of the oil suction speed and the thickness of the wick nonwoven fabric. From this, when the wick nonwoven fabric 7 is crushed in the thickness direction, the thickness of the wick nonwoven fabric is reduced and the oil supply amount is reduced, which shortens the life of the fixing device.

In this embodiment, a perforated partition plate 38 connected to the holder 8 is provided between the coating nonwoven fabric 6 and the wick nonwoven fabric 7 as shown in FIG. Was provided with an oil delivery nonwoven fabric 39.
FIG. 12 shows the distribution of the acting force on the nonwoven fabric in such a configuration. Although a strong force acts on the upper portion of the non-woven fabric 6 for application, the middle portion to the lower portion are in contact with a weak force.
On the other hand, the wick nonwoven fabric 7 is pressed at the center by the oil transfer nonwoven fabric 39 at the center of the coating nonwoven fabric 6, but is pressed with a small force as shown in the figure. Therefore, it is possible to reduce the crushing of the wick nonwoven fabric in the thickness direction, and it is possible to suppress a decrease in the oil supply amount when printing a large number of sheets.

FIG. 13 shows the results of comparing the oil supply amounts of the conventional structure, the first embodiment, and the release agent supply device for the image forming / fixing device of this embodiment before and after printing 100,000 sheets.
From these results, it was confirmed that the first embodiment can realize a higher oil supply amount than the conventional structure, and the present embodiment can realize a higher oil supply amount than the first embodiment.

Next, the structure of an image recording apparatus using the fixing device of the present invention will be described with reference to FIG. In FIG.
1 is a fixing device. Reference numeral 26 denotes a driven roller that also serves as a driving roller 33 and a tension roller that applies tension to the belt. Reference numeral 35 denotes a photosensitive belt that is stretched in the vertical direction by the driven roller 26 and rotates at a constant speed in the direction of the arrow. An intermediate transfer member 37 is disposed in contact with the photosensitive belt 35. Reference numeral 27 denotes a charger for uniformly charging the surface of the photoreceptor belt 35. An exposure device 24 exposes the surface of the uniformly charged photoreceptor belt 35 to form an electrostatic latent image on the surface. 25a, 25b, 25
Reference numerals c and 25d denote four developing devices which are arranged so as to be in contact with the horizontal surface of the photoreceptor belt 35 and develop the electrostatic latent image to form a toner image. Reference numeral 30 denotes a paper feed roller for feeding a recording medium from a cassette 23 containing the recording medium 16 such as paper. Reference numeral 31 denotes a registration roller for correcting the attitude of the recording medium fed from the cassette 23. Reference numeral 32 denotes a transfer roller that transfers a toner image to a recording medium. Reference numeral 34 denotes a paper discharge unit that discharges the fixing device 1 and the fixed recording medium to the outside of the apparatus. An erase lamp 29 removes electric charges remaining on the surface of the photoreceptor belt 35. 28 is a blade for removing the remaining toner. Reference numeral 36 denotes a cleaner for removing the toner remaining on the surface of the intermediate transfer body 37 after the transfer.

Next, a procedure for forming a color image by the image recording apparatus will be described. After the power is turned on, when a print signal is sent from an information processing device (not shown) to the printer body in a print standby state, a laser beam is uniformly charged by the charger 27 from the exposure device 24 to a portion corresponding to the toner image. Irradiated on the photosensitive belt 35 thus formed, an electrostatic latent image is formed on the photosensitive belt 35.

First, the exposure device 24 is placed on the photosensitive belt 35.
, An electrostatic latent image corresponding to the cyan toner image is formed, and is developed by the cyan developing device 25d to be a toner image.
Here, 25d is a developing device using cyan toner,
25c is a developing device using magenta toner, 25b
Is a developing device that uses yellow toner, and 25a is a developing device that uses black toner. By controlling a bias voltage to each developing device, a developing function is given or lost. . The toner image formed on the photoreceptor belt 35 is transferred to the surface of the intermediate transfer member 37 at a contact portion with the intermediate transfer member 37, and is held on the surface.

On the other hand, the photosensitive belt 35 after the transfer of the toner image
The upper portion is configured such that after the charge remaining on the surface of the photoreceptor belt 35 is removed by the erase lamp 29, the toner remaining without being transferred is removed by the blade 28. After the step of returning the surface of the photoreceptor belt 35 to the initial state is completed, a magenta toner image of the next color is similarly formed on the surface of the photoreceptor belt 35 and is held on the surface of the intermediate transfer member 37. The image is superimposed and transferred on the cyan toner image and held on the intermediate transfer member 37. The same process is repeated for the yellow and black colors, so that the four color toner images are superimposed on the intermediate transfer member 37 and simultaneously held on the surface.

In order to transfer the four-color toner image formed on the surface of the intermediate transfer member 37 onto the recording medium 16 in this manner, the paper feed roller 30 is rotated to rotate the recording medium 16 stored in the cassette 23. Are separated one by one and conveyed to the registration roller 31 to correct the skew of the recording medium 16 and then stop. Next, the rotation of the registration roller 31 is started at a timing such that the registration roller 31 is aligned with the toner image on the intermediate transfer member.
At the same time that the leading end of the conveyed recording medium comes into contact with the intermediate transfer body 37, the transfer roller 32 is pressed from the back of the recording medium,
The four color toner images on the surface of the intermediate transfer body 37 are electrostatically transferred onto the recording medium 16 at one time. The four color toner images formed on the recording medium 16 in this way are fixed by passing between the fixing roller and the pressure roller of the fixing device 1 and are fixed.
The sheet is discharged to the second sheet discharge unit 34, and a series of printing processes is completed.

By providing a fixing device having the above-described release agent supply device in such an image recording apparatus, even if the number of printed sheets increases, a stable oil supply can be achieved without causing stain on the recording medium. There is an advantage that stable printing and printing with a long life can be realized.

As described above, according to the present invention, in order to stabilize the amount of oil to be applied to the fixing roller, the contact portion between the fixing roller and the non-woven fabric for application and the non-woven fabric for application Is an image forming apparatus provided with pressing means on the back surface of the upstream half in the fixing roller rotation direction. Accordingly, the release agent supply device for the image forming / fixing device uses a system in which the nonwoven fabric is directly in contact with the oil application section in order to obtain a large initial oil supply amount. As a means for making the pressing force of the upper part of the nonwoven fabric (upstream in the rotation direction of the fixing roller) higher than the pressing pressure of the lower part of the nonwoven fabric, it is possible to prevent foreign matter from slipping out. The pressing means is provided on the back surface of the side half. (2) In order to increase the oil supply amount by increasing the contact area of the nonwoven fabric with the fixing roller, the holding member of the nonwoven fabric is constituted by a bent member.

Since the pressing means is provided behind the upstream half in the rotation direction of the fixing roller at the contact surface between the non-woven fabric for application and the fixing roller, the fixing roller is provided at the contact portion between the non-woven fabric for application and the fixing roller. The pressing force on the upstream side in the rotation direction becomes larger than that on the downstream side, so that the effect of removing foreign substances on the upstream side becomes large, and it is possible to reduce the oil supply amount due to the increase in the number of printed sheets and to prevent the recording medium from being stained due to toner slippage.

Further, by forming the holder for holding the coating nonwoven fabric and the wick nonwoven fabric into a bent shape having an obtuse bent portion as viewed from the fixing roller, the nip width between the coating nonwoven fabric and the fixing roller can be increased. The oil supply amount can be made larger than when the nip width is small, and stable application of oil can be realized.

As described above, according to the present invention, in stabilizing the amount of oil applied to the fixing roller, in order to increase the oil supply amount of the oil supply unit, the contact portion between the fixing roller and the non-woven fabric for application is removed. By providing the pressing means on the back surface of the half of the coating non-woven fabric on the upstream side in the rotation direction of the fixing roller, the amount of offset toner can be reduced, and the recording medium is formed by slipping between the non-woven fabric for coating the toner and the fixing roller. The generation of dirt can be prevented.

Further, since the pressing means is provided behind the upstream half in the rotation direction of the fixing roller at the contact surface between the coating non-woven fabric and the fixing roller, the fixing roller is rotated at the contact portion between the coating non-woven fabric and the fixing roller. The pressing force on the upstream side in the direction becomes larger than that on the downstream side, so that the effect of suppressing foreign matter on the upstream side becomes large, and it is possible to reduce the oil supply amount due to the increase in the number of printed sheets and to prevent the recording medium from being stained due to toner slippage.

Further, by forming the holder for holding the coating nonwoven fabric and the wick nonwoven fabric into a bent shape having an obtuse bent portion as viewed from the fixing roller, the nip width of the coating nonwoven fabric with the fixing roller can be increased. The oil supply amount can be made larger than when the nip width is small, and stable application of oil can be realized.

Further, since a perforated partition plate is provided between the nonwoven fabric for application and the wick nonwoven fabric, the crushing of the wick nonwoven fabric in the thickness direction can be reduced, and a decrease in the oil supply amount when printing a large number of sheets can be suppressed. .

[0046]

According to the present invention, since the initial oil supply is sufficient and the decrease in the oil supply due to an increase in the number of prints is small, good image quality can be ensured without replacing the nonwoven fabric, and recording is performed by passing through the toner. It is possible to provide an image recording apparatus in which the medium is hardly stained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a fixing device including a release agent supply device according to a first embodiment of the present invention.

FIG. 2 is a view showing the acting force of the nonwoven fabric for coating of the present invention.

FIG. 3 is a diagram illustrating a change in an acting force according to a position of a pressing force.

FIG. 4 is a diagram illustrating a relationship between a ratio of pressing force of upper and lower portions and an oil supply amount.

FIG. 5 is a diagram illustrating a contact state between a coating nonwoven fabric and a fixing roller when a coating nonwoven fabric holding holder is straight;

FIG. 6 is a diagram illustrating a relationship between a nip width between an application nonwoven fabric and a fixing roller and an oil supply amount.

FIG. 7 is a view showing a contact state between a coating nonwoven fabric and a fixing roller in a release agent supply device according to a second embodiment of the present invention.

FIG. 8 is a diagram illustrating a contact state between a nonwoven fabric for application and a fixing roller in another example of the release agent supply device of the second embodiment of the present invention.

FIG. 9 is a diagram illustrating a problem that occurs when printing a large number of sheets in the release agent supply device according to the first embodiment of the present invention.

FIG. 10 is a diagram showing the relationship between the thickness of a wick nonwoven fabric and the amount of oil supply.

FIG. 11 is a view showing a release agent supply device according to a third embodiment of the present invention.

FIG. 12 is a view showing a distribution of acting force of a nonwoven fabric provided in a release agent supply device according to a third embodiment of the present invention.

FIG. 13 is a diagram comparing oil supply amounts before and after printing a large number of sheets of the release agent supply device according to the conventional structure and the first and third embodiments of the present invention.

FIG. 14 is a diagram illustrating a structure of an image forming apparatus including a fixing device having the release agent supply device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fixing device, 2 ... Fixing roller, 3 ... Pressure roller, 4 ...
Rotary cleaning member, 5: release agent supply device, 6: non-woven fabric for application, 7: wick non-woven fabric, 8: holder, 9: pressing force applying means, 10: pressing means, 11: oil bottle,
Reference numeral 12: blade, 13: oil reservoir, 14: pressure roller cleaning member, 15: pressing force of pressing means, 16: recording medium, 17: unfixed toner, 18: fixed toner, 19
... paper powder, 20 ... offset toner, 21 ... release agent, 22
... image recording device, 23 ... cassette, 24 ... exposure device, 25 ...
Developing device, 26: driven roller, 27: charging device, 28: blade,
29: erase lamp, 30: paper feed roller, 31: registration roller, 32: transfer roller, 33: drive roller, 34: paper discharge unit,
35 photoconductor belt, 36 cleaner, 37 intermediate transfer member, 38
… Perforated partition plate, 39… Oil delivery non-woven fabric.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiromitsu Fukuda 502 Kandachi-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (72) Inventor Akira Mori 502-Kindachi-cho, Tsuchiura, Ibaraki, Japan Within the Machinery Research Laboratory (72) Inventor Riki Hiraoka 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi Taga Electronics Co., Ltd. Hitachi Taga Electronics Co., Ltd. (72) Inventor Atsushi Ohashi 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Pref. Hitachi Tag Electronics Co., Ltd. (72) Inventor Toru Hanajima 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Hitachi Taga Electronics Co., Ltd. (72) Inventor Katsuyoshi Onose 1-chome, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Item 1-1 F-term in Hitachi Taga Electronics Co., Ltd. (Reference) 2H033 AA08 AA09 AA16 AA39 BA42 BA43 BA44 BA45 BA46 BA49 BA50 BB01 BB28 4F040 AA05 AB20 BA07 CA01 CA02 CA13

Claims (4)

[Claims] A fixing device for fusing and fixing an unfixed toner image onto a recording medium, a release agent to be applied to a fixing roller of the fixing device, and the release agent being sucked up by a wick nonwoven fabric from a release agent reservoir; In an image recording apparatus provided with a release agent supply device for applying the fixing non-woven fabric to the fixing roller by the non-woven coating for application arranged in contact with the wick non-woven fabric, a pressing unit for pressing the non-woven coating application to the fixing roller; An image recording apparatus, comprising: a release agent supply device provided via a wick nonwoven fabric on a rear surface within an upstream half of a contact portion between the coating nonwoven fabric and the fixing roller in a rotation direction. 2. An image recording apparatus according to claim 1, further comprising a releasing agent supply device in which an upstream end of said non-woven fabric for application is in contact with a fixing roller in a rotation direction of said fixing roller. 3. The holding means for pressing the non-woven fabric for application is held via a wick non-woven fabric provided on the back surface of the non-woven fabric for application, and a holding tool having an obtuse bent portion as viewed from the fixing roller, and a pressing force applying means. The image recording apparatus according to claim 1, further comprising a release agent supply device configured by means. 4. A perforated partition plate connected to the holder is provided between the wick nonwoven fabric and the nonwoven fabric for application.
3. A release agent supply device comprising an oil delivery nonwoven fabric provided in a hole of the perforated partition plate.
The image recording device according to any one of the above.