JP2000310920A - Oil applying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil applying device easily attachable tightly on the oil holding member, being capable of uniformly applying silicone oil on a heat fixing roll, and being free from a deviation or stripping off of the oil application quantity controlling layer. SOLUTION: The device is, let sticking the oil holding member 2 and the oil application quantity controlling layer 3 in the dispersing state on the whole contact plane by hardnening of adhesive in a dispersing state by bonding the oil holding member 2 and the oil applying quantity controlling layer 3 by interposing a mixture of silicone varnish and the silicone oil. In such a manner, by the silicone oil in a distribution state on the whole contact plane, a passage in the oil applying quantity controlling layer is secured in the distribution state, the silicone oil can be applied on the heat-fix roll being free from unevenness, the oil application quantity control layer is prevented from being shifted or peeled, and bonding is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil applicator which is a component of a fixing device in an electrostatic copying machine, an electrophotographic printer or the like.

[0002]

2. Description of the Related Art In a fixing device of an electrostatic copying machine, an electrophotographic printer, or the like, when fixing toner transferred onto a recording sheet, the toner may adhere to a heat fixing roll, and the toner is transferred to the next recording sheet. To prevent the paper from being soiled, apply a small amount of release oil, such as silicone oil, to the fixing roll with an oil application roller, so that the toner does not adhere to the heated fixing roll or the recording paper adheres and does not wind up. Like that. Various oil application rollers having such a function have already been proposed. For example, as an oil holding member for storing the release oil to be applied, a metal-made hollow hollow pipe or a cylindrical molded body made of heat-resistant fiber is used, and the surface of the cylindrical molded body is made of polytetrafluoroethylene (PTFE). There is an oil application roller formed by winding an oil application amount control layer such as a material film and applying and bonding an RTV silicone rubber to an end portion and a wrap portion. Further, there is an oil application roller formed by processing the above-mentioned oil application amount control layer into a tube shape, coating the tube with a cylindrical oil holding member, and heat-shrinking it (Japanese Patent Application Laid-Open No. 9-18 / 1997).
No. 5282).

[0003] Further, the surface of a thick porous tissue material as an oil holding member is impregnated with a mixture of silicone rubber and a release oil in a porous tissue of porous polytetrafluoroethylene, and then crosslinked. There is an application mechanism for a copying machine provided with a formed oil application amount control layer (Japanese Patent Publication No. 6-7).
No. 3051). That is, the coating mechanism for a copying machine is configured such that an oil application amount control layer is wound once on a surface of a thick porous tissue material in a spiral manner, and then heated at a high temperature for a long time to perform crosslinking and heat fusion. It was made. According to the coating mechanism for a copying machine, the silicone oil, which is a release oil, can be accurately controlled, and in particular, it can be stably controlled over a long period of time even in an area where a small amount of silicone oil is applied to an oilless toner. Further, as a form of the oil application device, there is known a structure in which oil is applied to a fixing roll by a pad having a substantially flat plate shape in addition to a roller.

[0004]

However, in the oil application roller in which the oil application amount control layer is adhered to the above-mentioned cylindrical molded body, the release oil hardly comes out from the adhesion portion, resulting in application unevenness or a decrease in the adhesion area. Since the adhesive strength is insufficient due to the small size, the oil applied amount control layer is displaced or peeled off, and it is difficult to always apply the release oil to the heat fixing roll stably. In addition, in the case of an oil application roller in which the tubular oil application amount control layer is heated and shrunk, the heat application shrinkage of the oil application amount control layer is likely to be non-uniform, the hole diameter varies, and the mold is constantly and stably released from the heat fixing roll. Difficult to apply oil. Further, in the coating mechanism for a copying machine, high-temperature and long-time heating is required to heat-bond the oil-application-amount control layer to the thick porous tissue material. Also,
Even in an applicator that applies oil to a fixing roll using a pad-like structure, the same problem as described above occurs in a method of bonding an oil application amount control layer to the outermost surface layer. That is, also in this case, the release oil does not come out from the bonding portion, resulting in uneven coating, or the adhesion area is small due to the small bonding area, so that the oil coating amount control layer is shifted or peeled off, and the oil coating amount is reduced. The problem of becoming unstable occurs.

Accordingly, an object of the present invention is to make it possible to apply the release oil evenly to the heat fixing roll, to prevent the oil application amount control layer from shifting or peeling off during operation and to adhere to the oil holding member. An object of the present invention is to provide an easy oil application device.

[0006]

In such a situation, the present inventors have made intensive studies and as a result, when the oil application amount control layer is adhered to the oil holding member with a mixture of an adhesive and silicone oil, the mixture is mixed. Since the adhesive and the silicone oil are in a dispersed state, the oil holding member and the oil application amount control layer adhere to each other by curing the adhesive, thereby closing the hole of the oil application amount control layer, and the uncured portion. The portion where the silicone oil intervenes and does not block the pores is present in a dispersed state, the bonded portion in the dispersed state prevents displacement and peeling of the oil application amount control layer, and the dispersed silicone oil portion allows the oil to pass through. As a result, they have found that silicone oil can be applied evenly to the heat-fixing roll, thereby completing the present invention.

[0007] That is, the invention according to claim 1 provides an oil application apparatus characterized in that an oil application amount control layer is adhered to an oil holding member with a mixture of an adhesive and silicone oil. It is. By adopting such a configuration, the oil holding member and the oil applied amount control layer are entirely adhered in a dispersed state by the curing of the adhesive in the dispersed state, and the oil applied amount control layer is entirely formed by the dispersed silicone oil. Securing the oil passage for silicone oil in a dispersed state.

According to a second aspect of the present invention, an oil application amount control layer is bonded to an oil transfer layer or an elastic layer provided on the oil application side of the oil holding member with a mixture of an adhesive and silicone oil. An oil application device is provided. By adopting such a configuration, the same function as described above is exerted even when an oil transfer layer or an elastic layer for preventing coating unevenness is provided between the oil holding member and the oil coating amount control layer.

Further, in the invention according to a third aspect of the present invention, the bonding is performed at the entire contact surface between the oil holding member and the oil applied amount control layer, or between the oil transfer layer or the elastic layer and the oil applied amount control layer. It is an object of the present invention to provide an oil applying apparatus in which the mixture is interposed on all contact surfaces with a layer.
By adopting such a configuration, in addition to the above functions, on all contact surfaces, the oil holding member, or the oil transfer layer or the elastic layer and the oil application amount control layer adhere in a dispersed state,
In addition, the silicone oil in the dispersed state ensures the passage of the silicone oil in the oil application amount control layer in the dispersed state.

Further, in the invention according to a fourth aspect, the oil application amount control layer has an air permeability of 10 to 2000 sec / 10.
The purpose of the present invention is to provide an oil application device that is 0 cc. By adopting such a configuration, in addition to the above function, an appropriate amount of the silicone oil held by the oil holding member can pass through the oil application amount control layer.

The invention according to claim 5 is characterized in that the oil coating amount control layer is made of polytetrafluoroethylene (PTF).
E) To provide an oil application device which is a porous film. By adopting such a configuration, in addition to the above functions, there is no difference between the start of operation and the steady operation, and a fixed amount of silicone oil can be stably applied to the heat fixing roll.

In the invention according to claim 6, the adhesive is a silicone varnish, and the mixture has a mixing ratio (SW: SO) of the silicone varnish (SW) and the silicone oil (SO) of 99: 1 to 20:80. By adopting such a configuration, in addition to the above-described functions, in the case where the toner is further improved in the future and the adhesion of the toner to the fixing roller can be suppressed by applying a smaller amount of silicone oil, the oil holding member and the oil It is also possible to apply a small amount of silicone oil while securing the adhesive strength with the coating amount control layer.

In the invention according to claim 7, the adhesive is a silicone varnish, and the mixture has a mixture ratio (SW: SO) of the silicone varnish (SW) and the silicone oil (SO) of 90: An object of the present invention is to provide an oil application device having a ratio of 10 to 20:80. By adopting such a configuration, in addition to the above functions, the adhesive strength between the oil holding member and the oil application amount control layer can be ensured, and the silicone oil can be applied in a well-balanced state. The amount of oil applied can be controlled freely.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments by referring to FIGS. FIG. 1 is a side view showing an installation state of an oil applying roller according to an embodiment of the present invention in a fixing device, FIG. 2 is a radial cross-sectional view of the oil applying roller according to the embodiment of the present invention, and FIG. It is an axial sectional view of an oil application roller which is an embodiment of the invention.
In the figure, reference numeral 1 denotes an oil application roller, and an oil application roller 1 has an oil application amount control layer 3 on an oil holding member 2.
Is adhered with a mixture of an adhesive and silicone oil as a basic component. The oil application roller 1 is incorporated in the fixing device 4, and the fixing device 4 passes the recording paper 7 between the heating fixing roll 5 and the pressure roll 6, and is transferred to the front surface 7 a of the recording paper 7. To fix the toner 8, the oil application roller 1 is brought into contact with the heat fixing roll 5 so that the toner 8 on the surface 7 a of the recording paper 7 does not adhere to the heat fixing roll 5. Silicone oil is applied to the heat fixing roll 5.

The oil holding member 2 is not particularly limited as long as it has a structure capable of holding silicone oil. The oil holding member 2 of this embodiment is a cylindrical porous molded body having aluminosilicate fibers as a main material bonded to each other by a binder, and having fine communicating voids in which there is no binder between the fibers. It has a porosity of 60 to 80%, can hold a large amount of silicone oil, and has a shaft 10 attached thereto. An oil transfer layer 1 is provided on the outer periphery of the oil holding member 2.
1 is formed. The oil transfer layer 11 is made of heat-resistant fiber felt, is wound around the outer periphery of the oil holding member 2, absorbs the silicone oil from the oil holding member 2, and serves to supply the silicone oil to the oil application amount control layer 3. I am carrying it. The heat-resistant fiber felt used herein has a thickness of 2 to 3 mm and a density of 170 to 260 kg / m ³ , but is not particularly limited. The silicone oil held by the oil holding member 2 is usually 50 to 300.
A low viscosity silicone oil of cSt (25 ° C) is used.

The oil application amount control layer 3 has an air permeability of 1
It is 0 to 2000 sec / 100 cc, and is not particularly limited as long as it allows the passage of silicone oil. In the oil application amount control layer 3 of this embodiment, a stretched polytetrafluoroethylene (PTFE) porous film (hereinafter, referred to as a PTFE porous film) is used. The porous PTFE membrane has, for example, a surface roughness Ra of 0.7 to 0.8 mm, a thickness of 30 to 60 μm, and an air permeability of 60 to 100 seconds / 100 cc.
Having a pore diameter of 0.05 to 0.1 μm and a porosity of 60%. "Air permeability" is the Gurley number (unit: sec / 100cc) measured with a B-type Gurley densometer
), And the “porosity” is a value calculated from the specific gravity measurement value according to the following formula: porosity (%) = (1−bulk specific gravity / true specific gravity) × 100.

The oil application amount control layer 3 includes an oil transfer layer 11 formed on the outer periphery of the oil holding member 2.
The mixture is adhered with a mixture of an adhesive and silicone oil, and it is important that the mixture is sufficiently mixed and dispersed with each other. One oil application amount control layer 3 on the surface
Twist and glue. That is, the entire surface of the oil application amount control layer 3 that is in contact with the entire outer periphery of the oil transfer layer 11 is adhered with the mixture. This adhesive is not particularly limited as long as it can bond the oil transfer layer 11 and the oil application amount control layer 3 in the state of coexistence with silicone oil. In this example, a silicone varnish was employed as the adhesive,
This silicone varnish (SW) and silicone oil (S
O) at a mixing ratio of 90:10 to 20:80 (SW: SO
= 90:10 to 20:80). 90: 1 mixing ratio
When the ratio is less than 0, for example, 95:05, the adhesive portion is large and the oil passage of the silicone oil is small, and the application amount is insufficient. Conversely, when the mixing ratio exceeds 20:80, for example, 10:90, the adhesive portion becomes small, and the adhesive strength between the oil transfer layer 11 and the oil application amount control layer 3 becomes insufficient. In the future, toner improvements will progress,
It is also expected that the application of a smaller amount of silicone oil can suppress the adhesion of toner to the fixing roller.
That is, at present, about 0.5 to several mg / sheet (equivalent to A4 size) is required, and the oil application amount is smaller, for example,
It is expected that the coating amount will be about 0.2 mg / sheet or less. In such a case, the mixing ratio of the silicone varnish in the mixture can be increased by, for example, increasing the silicone varnish to 99 parts with respect to 1 part of the silicone oil. Therefore, in the present invention, the mixing ratio of silicone varnish to silicone oil is 99: 1.
~ 20: 80 can be used.

As the silicone varnish, those generally called silicone varnish can be used. That is, a silicone resin having an extremely high crosslinking density of silicone rubber is a silicone resin, and a silicone varnish is obtained by dissolving an unreacted silicone resin in a solvent. This silicone varnish has many 3 to 4 functional components, and has an excellent adhesive ability as compared with silicone rubber. Even if a silicone rubber is used instead of the silicone varnish, the adhesive strength is greatly reduced, or the amount of oil applied is limited, so that it is not practical. Specific examples of the silicone oil to be mixed with the silicone varnish include a linear methyl silicone oil, a branched methyl silicone oil, a methylphenyl silicone oil, and a modified silicone oil in which some of the dimethyl groups are substituted with other organic groups. The viscosity is usually 100 to 300,000 cSt at 25 ° C., preferably 5000 to 30,000 cSt.

FIG. 4 shows another embodiment of the present invention. The difference between the oil application roller 1a and the oil application roller 1 shown in FIGS. 1 to 3 is that the oil transfer layer 11 and the oil application amount are different. That is, the elastic layer 12 is interposed between the control layer 3 and the elastic layer 12. This elastic layer 12 has a thickness of 0.5 mm and a density of 6 mm.
A non-woven fabric of about 0 kg / m ³ is used to eliminate the step generated when the heat-resistant fiber felt of the oil transfer layer 11 is wound around the outer periphery of the oil holding member 2.
This step is negligible when fixing toner on normal recording paper, but in the case of plastic OHP paper, unevenness in the density of the fixed image may occur due to uneven application of silicone oil caused by this step. There is.
Therefore, by interposing the elastic layer 12 on the oil transfer layer 11, the oil application roller 1 a is provided in that the step is eliminated, the uneven application of the silicone oil is prevented, and the shading of the fixed image does not occur. Useful.

FIG. 5 shows another embodiment of the present invention. FIG. 5 shows an example in which a pad type having a substantially flat plate shape is adopted as the structure of an oil application device that applies release oil to the heat fixing roll 5. In this structure, a PTFE porous film 53 is adhered to the surface of a substantially flat oil holding portion 52 made of a material such as a porous material or a felt by a mixture of an adhesive and silicone oil. In this case, the oil application pad 1b
Abuts on the heat fixing roller 5 in a fixed state.

[0021]

Next, the present invention will be described more specifically with reference to examples. Example 1 Aluminosilicate fiber as main material, outer diameter 29.4
An oil holding member having a size of 8.0 mm x 8.0 mm x 338.0 mm in length was prepared, a shaft was mounted on the oil holding member, and about 130 g of dimethyl silicone oil having a viscosity of 100 centistokes (cSt) (25 ° C) was further impregnated. Then, a felt (available from Nippon Felt Co., Ltd.) made of aramid heat-resistant fiber having a thickness of 2.8 mm and a density of 260 kg / m ³ was wound around the outer surface of the oil holding member and fixed. Further, a silicone varnish (“KR”) was coated on the entire surface of the oil coating amount control layer, which was a stretched PTFE porous film having a thickness of 30 μm, a porosity of 60%, and a maximum pore diameter of 0.1 μm.
105 "Viscosity at 25 ° C 700 cSt (700 mPa-sec) manufactured by Shin-Etsu Chemical Co., Ltd. and silicone oil (" KF-96 "25
Viscosity at 100 ° C 100,000 cSt (100,000 mPa · sec) Shin-Etsu Chemical Co., Ltd.)
And a mixture having a mixing ratio of 9: 1 with the mixture (hardening accelerator is added to the mixture by about 3% by weight), and the oil application amount control layer is wound once around the outer peripheral surface of the oil transfer layer in a laver winding form. To obtain an oil application roller. This oil application roller is evaluated by the following tests (1) and (2).

(1) Attached to a commercially available color printer (color passing speed: 4 ppm), passing 5,000 sheets of ordinary color paper, 500 sheets, 1000 sheets, 2000 sheets, 3000 sheets,
The amount of silicone oil applied on the plain color paper after each pass of 4,000 sheets and 5,000 sheets was measured, and further, peeling and displacement of the oil applied amount control layer after the test were visually observed. (2) A single magenta single-color solid image is fixed on OHP paper and passed through the color printer, and the presence or absence of unevenness in the application of silicone oil on the OHP paper is observed. The unevenness of application of the silicone oil is observed as shading and color unevenness of a solid image of a single magenta color.

Examples 2 to 4 Each oil application roller was manufactured in the same manner as in Example 1 except that the same silicone varnish and silicone oil as in Example 1 were changed to the mixing ratio within the range of the present invention shown in Table 1. Then, each of these oil application rollers is evaluated by tests (1) and (2). Table 1 shows the results.

Comparative Examples 1 and 2 Each of the oil application rollers was obtained in the same manner as in Example 1 except that the mixing ratio of the silicone varnish and the silicone oil as in Example 1 was changed to those shown in Table 1. The applicator roller is evaluated by tests (1) and (2). Table 1 shows the test results.

[0025]

[Table 1]

According to Table 1, the amount of the silicone oil applied in the test (1) in Examples 1 to 4 decreases as the mixing ratio of the silicone varnish as the adhesive in the mixture of the silicone varnish and the silicone oil decreases. And it is increasing gradually. On the other hand, in Comparative Example 1, since the bonding was performed only with the silicone varnish, the entire surface was bonded, and the amount of silicone oil applied was 0. Comparative Example 2 has the lowest mixing ratio of silicone varnish, and therefore has the largest amount of silicone oil applied. In addition, while there was no peeling or displacement of the oil application amount control layer in the test (1) in Examples 1 to 4, Comparative Example 2 had a low mixing ratio of the silicone varnish, so that the adhesive force was weak and the oil application amount was controlled. A layer shift occurred. In Comparative Example 1, the amount of silicone oil applied was 0.
Therefore, peeling and displacement of the oil application amount control layer were not confirmed. From the results of Examples 1 to 4 and Comparative Examples 1 and 2, by changing the mixing ratio of silicone varnish or silicone oil as an adhesive in the mixture,
The application amount of the silicone oil can be controlled, and the controllable range of the application amount is such that the mixing ratio between the silicone varnish (SW) and the silicone oil (SO) is 90:10 to 20:
80 (SW: SO = 90: 10 to 20:80).

Further, there was no unevenness in application of the silicone oil on the OHP paper in the test (2) in Examples 1 to 4 and Comparative Example 2, and no difference was observed. In Comparative Example 1, the test (2) was not performed for the same reason as described above.

(Evaluation of Peeling Strength) Reference Examples 1 to 7 Instead of a liquid mixture of silicone varnish and silicone oil, silicone rubber “KR-106” having a viscosity at 25 ° C. of 5,
000cSt (5,000mPa · s) (Shin-Etsu Chemical Co., Ltd.) and silicone oil “KF-96” (Shin-Etsu Chemical Co., Ltd.) are used, and the mixing ratio (rubber / oil) is 1/1 (Reference Example) 1), 2/1 (Reference Example 2), 10/1 (Reference Example 3), 2
An oil application roller was obtained in the same manner as in Example 1, except that the oil was prepared at a ratio of 0/1 (Reference Example 4). The obtained oil application roller was subjected to a peel strength test under the following conditions, and the peel strength at which the PTFE porous film was peeled from the felt as the oil transfer layer was determined. For comparison, the same silicone varnish and silicone oil as in Example 1 were used,
An oil application roller having a (varnish / oil) ratio of 1/1 (Reference Example 5 = Example 3), 2/1 (Reference Example 6), and 20/1 (Reference Example 7) was prepared. The peel strength of the PTFE porous film on the roller was determined by performing the same test. Table 2 shows the results.

(Peeling strength test) Test size: 30 × 100 mm Test speed: 10 mm / min Application amount of mixed solution: 100 g / m ²

[0030]

[Table 2] Note) The practical peel strength is 3 kgf / m (29 N / m).

The peel strength is defined as the tensile strength in the process of peeling the PTFE porous film when the film is pulled. Therefore, this peel strength is equivalent to the adhesive strength of the porous PTFE membrane. The practical peel strength described in the margin of Table 2 is the minimum peel strength required for a practical PTFE film obtained experimentally. Peel strength is 3kgf / m (29N / m)
In the following cases, the use of PTF
Peeling and displacement of the E film are likely to occur, and the practicability is greatly reduced.

As is clear from Table 2, when silicone rubber is used instead of silicone varnish, the adhesive strength is greatly reduced. In the case of using silicone rubber, by increasing the compounding ratio, barely exceeding the practical peel strength can be obtained, but there is no margin in the adhesive strength, and the practical reliability is low. In addition, if the blending ratio of silicone rubber is increased in order to increase the adhesive strength, the amount of oil applied decreases, so that even if the strength of the PTFE film is secured, the setting range of the amount of oil applied is limited. . Since the required amount of applied oil differs depending on the type of the oil application device and the type of toner to be used, limiting the setting range of the oil application amount is a major obstacle in supplying products.

When silicone rubber is selected, the adhesiveness of the mixture with silicone oil is low, and PTFE is used.
There is also a problem that the bonding operation of the film is difficult as compared with a case where a silicone varnish is selected. Since the oil application roller of the present embodiment uses a mixture of silicone varnish and silicone oil as an adhesive, it sets the high adhesive strength of the PTFE film on the oil application roller and the required oil application amount over a wide range. Can be solved together.

[0034]

According to the first aspect of the present invention, the oil holding member and the oil application amount control layer are entirely adhered in a dispersed state by curing the adhesive in the dispersed state, and the oil is applied with the dispersed silicone oil. The quantity control layer secures the passage of the silicone oil in a dispersed state as a whole. Accordingly, it is possible to apply the silicone oil as the release oil evenly to the heat fixing roll, to prevent the oil applied amount control layer from shifting or peeling off during operation, and to adhere the oil applied amount control layer to the oil holding member. This has the effect of being easier.

According to the second aspect of the present invention, since the oil transfer layer and the elastic layer are provided between the oil holding member and the oil applied amount control layer, the oil applied amount control layer is displaced during operation as described above. The coating non-uniformity can be prevented more reliably without peeling.

According to the third aspect of the present invention, the oil holding member and the oil application amount control layer are adhered in a dispersed state on all contact surfaces, and the silicone oil in the oil application amount control layer is dispersed by the dispersed silicone oil. Are secured in a dispersed state. Therefore, the above-mentioned effect becomes more remarkable.

According to the fourth aspect of the present invention, the silicone oil or the dispersed silicone oil held by the oil holding member can pass through the oil application amount control layer in an appropriate amount. Therefore, in addition to the above-mentioned effects, it is possible to ensure and apply an appropriate amount of silicone oil and to control the amount of application.

According to the fifth aspect of the present invention, there is no difference between the start of operation and the steady operation, and a fixed amount of silicone oil can be stably applied to the heat fixing roll. Therefore, in addition to the above effects, not only can the silicone oil be applied evenly to the heat fixing roll per sheet of recording paper that has passed, but also the amount of silicone oil applied depending on the operating conditions and the number of recording sheets passed. Can be reduced.

According to the sixth aspect of the present invention, even if the improvement of the toner progresses in the future and the application of a smaller amount of silicone oil can suppress the toner adhesion to the fixing roller, the oil holding member and the oil It is also possible to apply a small amount of silicone oil while securing the adhesive strength with the coating amount control layer.

According to the seventh aspect of the present invention, the adhesion strength between the oil holding member and the oil application amount control layer can be ensured, and the silicone oil can be applied in a well-balanced state. The amount of oil applied can be controlled freely. Therefore, the required adhesive strength and the amount of silicone oil applied can be selected according to the purpose, and the range of use can be expanded accordingly.

[Brief description of the drawings]

FIG. 1 is a side view showing an installation state of an oil application roller according to an embodiment of the present invention in a fixing device.

FIG. 2 is a radial cross-sectional view of an oil application roller according to the embodiment of the present invention.

FIG. 3 is an axial sectional view of an oil application roller according to the embodiment of the present invention.

FIG. 4 is an axial sectional view of an oil application roller according to another embodiment of the present invention.

FIG. 5 is an axial sectional view of an oil application roller according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b Oil application device 2, 52 Oil holding member 3, 53 Oil application amount control layer 4 Fixing device 5 Heat fixing roll 6 Pressure roll 7 Recording paper 7a Surface 8 Toner 10 Shaft 11 Oil transfer layer 12 Elastic layer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Naka 1-8-1 Shintoda, Hamamatsu-shi, Shizuoka Nichias Inside Hamamatsu Research Institute Co., Ltd. (72) Inventor Yumi Abe 1-8-1, Shintoda, Hamamatsu-shi, Shizuoka Nichias Corporation Hamamatsu Research Laboratories (72) Inventor Yoshiyuki Motoyoshi 1-1-26 Shiba-Daimon, Minato-ku, Tokyo Inside Nichias Corporation

Claims (7)

[Claims] 1. An oil applicator characterized in that an oil application amount control layer is adhered to an oil holding member with a mixture of an adhesive and silicone oil. 2. An oil application amount control layer is bonded to an oil transfer layer or an elastic layer provided on an oil application side of an oil holding member with a mixture of an adhesive and silicone oil. Oil applicator. 3. The mixture is applied to the entire contact surface between the oil holding member and the oil application amount control layer, or to the entire contact surface between the oil transfer layer or elastic layer and the oil application amount control layer. 3. The method according to claim 1, wherein
The oil application device as described in the above. 4. The oil coating device according to claim 1, wherein the oil application amount control layer has an air permeability of 10 to 2000 seconds / 100 cc. 5. The oil coating device according to claim 1, wherein the oil coating amount control layer is a polytetrafluoroethylene porous film. 6. The adhesive is a silicone varnish,
The mixture has a mixing ratio (SW: SO) of the silicone varnish (SW) and the silicone oil (SO) of 99:
The oil application device according to any one of claims 1 to 5, wherein the ratio is 1 to 20:80. 7. The adhesive is a silicone varnish,
The mixture has a mixing ratio (SW: SO) of the silicone varnish (SW) and the silicone oil (SO) of 90:
The oil application device according to any one of claims 1 to 5, wherein the ratio is 10 to 20:80.