JP2002072745A - Oil coating roller - Google Patents

Abstract

(57) [Summary] [Problem] By heating a heat-fixing roll at the beginning of paper passing
Provided is an oil application roller in which the amount of release oil applied is constant and stable even when oil held in the oil application roller or air in a gap is thermally expanded. SOLUTION: The expansion pressure in the porous cylindrical oil holding member is impregnated with a release oil, and a porous cylindrical oil holding member having a through groove or a through hole communicating with both end surfaces along the axial direction is used. From the through-groove or through-hole to prevent excessive application of release oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil application roller 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. In a state where the release oil is applied by the oil application roller, the oil application roller is heated by the heat of the heat fixing roller. Although there is a type in which the fixing roller itself does not generate heat, even in such a case, heat is transmitted to the oil application roller, and the oil application roller is also heated. Due to this heating, the oil held in the oil application roller and the air in the gaps thermally expand, and the expansion pressure causes the release oil held in the oil holding member to be pushed out to, for example, a felt layer, and then the oil application amount It is extruded in the direction of the surface of the PTFE film as a control layer.

[0003] This phenomenon becomes more remarkable in the early stage of coating application in which the ratio of the release oil in the oil holding member is high, for example, up to about 1500 sheets passed.
The release oil applied amount per sheet becomes excessive. If the oil is excessively applied, unevenness in density occurs in the obtained image, and various problems such as blurring and color unevenness occur. However, this excessive oil application phenomenon stops when the release oil occupation ratio in the oil holding member decreases. Therefore, in order to solve this problem, an oil application roller without excessive oil application can be obtained by reducing the amount of the release oil held in advance.

[0004]

However, reducing the amount of release oil previously held reduces the life of the oil application roller.

Therefore, according to the present invention, the oil and the gap held in the oil application roller are heated by the heat from the heat-fixing roller at the beginning of the sheet passing without reducing the amount of the release oil held in advance. An object of the present invention is to provide an oil application roller in which the amount of release oil applied is constant and stable even when air thermally expands.

[0006]

In such a situation, the present inventors have made intensive studies and as a result, have found that an air vent groove which communicates with at least one end face along the axial direction, which is an escape path for inflated air, to the oil holding member. Or, if an air vent hole is provided, even if the oil held in the oil application roller or the air in the gap is thermally expanded by heating from the heat fixing roller at the initial stage of paper feeding, the pressure in the oil application roller is increased. Restrained,
The present inventors have found that it is possible to prevent an excessive amount of the release oil from being applied, and have completed the present invention.

That is, the present invention (1) includes a porous cylindrical oil holding member that is impregnated with a release oil and has an air vent groove or an air vent hole communicating with at least one end face along the axial direction. An oil application roller is provided. By adopting such a configuration, the internal pressure generated in the porous cylindrical oil holding member escapes to the air vent groove or the air vent hole, so that the pressure increase in the oil application roller is suppressed, and the applied amount of the release oil is abnormal. Is prevented from becoming excessive.

Further, the present invention (2) provides an oil for a porous cylindrical oil holding member which is impregnated with a release oil and has an air vent groove or an air vent hole communicating with at least one end face along the axial direction. An oil application roller having an oil application control layer provided on an application side and an end side,
An oil application roller provided with an air release hole for releasing an internal pressure communicating with the air release groove or the air release hole on an end portion of the oil application amount control layer or on an outer peripheral surface not in contact with the fixing roller. Things. With this configuration, the air vent groove or air vent hole formed in the porous cylindrical oil holding member is in communication with the outside (atmosphere), and the pressure inside the oil application roller is effectively released to the outside. Can be.

The present invention (3) provides an oil for a porous cylindrical oil holding member which is impregnated with a release oil and has an air vent groove or an air vent hole communicating with at least one end face along the axial direction. An oil application roller having an oil transfer layer provided on an application side and an end side, and further having an oil application amount control layer provided on the oil application side and the end side, wherein the oil transfer layer or the oil application layer is provided. An oil application roller provided with an air release hole for releasing an internal pressure communicating with the air release groove or the air release hole on an end portion of the amount control layer or on an outer peripheral surface not in contact with the fixing roller. . By adopting such a configuration,
An oil application roller having an oil transfer layer such as a felt layer has the same effect as the above invention.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A porous cylindrical oil holding member used in an oil application roller of the present invention is impregnated with release oil and has an air vent hole or an air vent hole communicating with at least one end face along an axial direction. It has an air vent groove. It is sufficient that the air vent hole communicates with at least one end surface of the porous cylindrical oil holding member, and even if it is a through hole that communicates with both end surfaces of the porous cylindrical oil holding member, a non-through hole having a structure interrupted in the middle. It may be. It is not necessary to be parallel to the axial direction, but may be a spiral shape, and the cross-sectional shape may be any of a circular shape, a square shape, a triangular shape, an elliptical shape, and an irregular shape. The volume of the air vent hole occupied by the porous cylindrical oil holding member is appropriately determined.
In addition, the number is also set arbitrarily. If the volume of the air vent hole is too large, the oil holding ability of the porous cylindrical oil holding member for releasing oil is reduced, and only a short life is obtained. Further, if the volume of the air vent hole occupying the porous cylindrical oil holding member is too small, the expanded air cannot be effectively released.

[0011] The air vent groove may be connected to at least one end face of the porous cylindrical oil holding member, similarly to the air vent hole, and may be a through groove communicating with both end faces of the porous cylindrical oil holding member. However, it may be a non-through groove having a structure interrupted on the way. It is not necessary to be parallel to the axial direction, and it may be spirally formed on the outer peripheral surface.
The cross-sectional shape may be any of a semicircular shape, a V shape, a U shape, and an irregular shape. The volume of the air vent groove occupied by the porous cylindrical oil holding member is appropriately determined. If the volume of the air vent groove occupied by the porous cylindrical oil holding member is too large, there is a greater concern that coating unevenness may occur due to the presence of the groove, and the oil of the release oil of the porous cylindrical oil holding member may be increased. The holding capacity is reduced, and only those having a short life can be supplied. Further, if the volume of the air vent groove occupying the porous cylindrical oil holding member is too small, the expanded air cannot be effectively released.

An outline of an oil application roller according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing an installation state of an oil application roller according to the present embodiment in a fixing roller, FIG. 2 is a radial sectional view of the oil application roller according to the embodiment of the present invention, and FIG. FIG. 2 is a partial cross-sectional view in the axial direction as viewed along line AA. In the figure, reference numeral 1 denotes an oil application roller. The oil application roller 1 is provided with an oil transfer layer 11 on a porous cylindrical oil holding member 2 and further wraps an oil application amount control layer 3 or by using an adhesive and silicone. The basic constituent element is to adhere with a mixture with oil. 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 porous cylindrical oil holding member 2 is impregnated with release oil and has both end faces 2b, 2b along the axial direction.
Has a circular through-hole 9 having a circular cross section leading to. The diameter of the through hole 9 is not particularly limited, and may be, for example, about 1/10 (１０〜) of the diameter of the porous cylindrical oil holding member 2. Further, a plurality of through holes 9 may be provided.

Oil control layer 3 and oil transfer layer 1
Reference numeral 1 denotes an end portion of the porous cylindrical oil holding member 2 which is folded inward at both end edges of the porous cylindrical oil holding member 2.
b. That is, the oil application amount control layer 3 and the oil transfer layer 11 cover the entire outer peripheral surface and end of the porous cylindrical oil holding member 2 except for the shaft 10. The outer peripheral surface and the end of the porous cylindrical oil holding member 2 and the oil transfer layer 11, and the outer peripheral surface and the end of the oil transfer layer 11 and the oil amount control layer 3 are usually bonded to each other with an adhesive as described later. Have been. The contact portion between the oil application amount control layer 3 and the oil transfer layer 11 and the shaft 10
In the figure, sealing is performed with a sealing material which is omitted to prevent the release oil from leaking to the outside.

In the present embodiment, the air vent holes 12
Is provided on the end of the oil application amount control layer or on the outer peripheral surface that does not contact the fixing roller, preferably in the lateral direction of a through groove or a through hole described later, and at the end of the oil application amount control layer. Is done. In FIG. 3, in the side direction of the through hole 9,
In addition, it is attached to the end 3b of the oil application amount control layer.
The side direction of the through hole 9 refers to a portion where the oil transfer layer 11 or the oil application amount control layer 3b contacts the through hole 9. In other words, when viewed from the side (end face), it refers to the cross-sectional shape of the through groove or through hole. When the roller length of the oil application roller 1 is longer than the roller length of the fixing roller, the outer peripheral surface 14 that does not contact the fixing roller exists.
2 may be provided. In this case, since the air vent hole 12 does not come into contact with the fixing roller, it does not adversely affect the oil application. Although the number of the air vent holes 12 is one or more, it is preferable to provide four to eight even-numbered holes at regular intervals, in terms of sufficient release of the expanded air.

According to the first embodiment, when the oil application roller is installed in a copying machine or the like and is in use, and is heated by receiving heat from the heat fixing roller, the porous cylindrical oil holding member 2 Escapes into the through hole 9 and is further discharged through the end face of the oil transfer layer. For this reason, the pressure increase in the oil application roller is suppressed, and the applied amount of the release oil does not become excessive.

As a modification of the first embodiment, for example, the oil transfer layer 11 can be omitted. In this case, since the air vent hole 12 communicates with the through hole 9, the escape of the inflated air is quickly and reliably performed. Further, the air vent hole 12 may be communicated with the through hole 9 without extending the oil transfer layer 11 to the end face. Also, for example, the air vent hole 1
2 may penetrate both the oil transfer layer 11 and the oil application amount control layer 3. This is preferable in that the escape of the expanded air is performed quickly and reliably. Further, the air vent hole 12 is omitted, and the porous cylindrical oil holding member 2 is formed.
A diaphragm may be arranged at both ends of the through hole to absorb the pressure in the through hole 9. Furthermore, the air vent hole 12 may be sealed with a material that solidifies at room temperature and melts at the operating temperature of the oil application roller 1.

An oil application roller according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a radial cross-sectional view of the oil application roller according to the second embodiment, and FIG. 5 is a partial cross-sectional view in the axial direction taken along line BB of FIG. 4 and 5, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and the description thereof will be omitted. Only different points will be described. That is, FIGS. 4 and 5 are different from FIGS. 2 and 3 in that the through holes 91 are provided instead of the through holes 9. The through groove 91 penetrates through both end faces 2b, 2b. Through groove 9
The depth of 1 is not particularly limited, and may be, for example, about 1/10 (１ ／) of the diameter of the porous cylindrical oil holding member 2. The width of the through groove may be about 0.5 to 8 mm. Further, the number of the through grooves 91 may be one or two or more. The depth, width and number of the through grooves 91 are determined as appropriate.

The porous cylindrical oil holding member used for the oil application roller of the present invention is, for example, a porous cylindrical ceramic molded body having a diameter of one pore of 5 mm.
A large amount of silicone oil is retained in a large pore group of 0 to 2000 μ. The retained silicone oil moves to the heat-resistant fiber felt, which is an oil transfer layer, by capillary action via fine inter-fiber voids, and then permeates the oil coating amount control layer of the porous membrane, and finally Bleeds on the surface of the oil application amount control layer. The silicone oil held by the porous cylindrical oil holding member is usually 25%.
50-1000 cSt at C, preferably 50-300 cSt
Low viscosity silicone oil is used. The porous cylindrical oil holding member is preferably the above-mentioned porous ceramic molded body, but is not limited to the above-mentioned structure, and may be formed of a group of pores having a diameter of one pore of less than 50 μm, a sponge-like, or other various Can be used. Such an oil holding member obtains a high oil holding ability and an oil application performance that does not change with time by holding the release oil in the air holes and the gap between the fibers plays a role in moving the release oil by the capillary force. Can be. On the other hand, the internal resistance of the material itself to the fluid is relatively large, so that the influence of the expansion of the heated air accompanying the rise in the temperature at the time of paper passage is remarkable. Therefore, the effect of forming the air vent groove or the air vent hole of the present invention becomes remarkable.

The oil transfer layer used in the oil application roller of the present invention can use heat-resistant fiber felt. This heat-resistant fiber felt is obtained, for example, by forming a fiber material group into a plate-like web by roller molding or the like, and then processing the web by a needle punch method. The needle punching method is a well-known method that uses no binder and is a mechanical joining method. A large number of needles having small barbs are moved up and down to pierce the web and push the fibers in the web. In this method, a three-dimensional fiber is entangled with a planar nonwoven fabric and joined. Heat resistant fiber felt is
Since it has a three-dimensional network structure made of a fibrous material having a diameter of about 10 μm, an oil application roller using the same has an increased ability to suck up oil from a porous cylindrical molded body.

The oil application amount control layer existing on the outermost layer of the oil application roller is a porous film, and stabilizes the application amount of the silicone oil, which is the release oil, to a suitable state. The oil application amount control layer has, for example, a thickness of 15 to 130 μm and an average pore diameter of 0.05 to 3.0 μm.
Porosity 60-90%, air permeability 3-1500 sec / 100cc
When the oil coating amount control layer and the fiber felt are bonded with a mixture of silicone varnish and silicone rubber, the thickness is 15 to 130 μm and the average pore diameter is 0.05 to 3.0 μm. It is preferable to use a porous membrane having an air permeability of 10,000 to 3,000,000 seconds / 100 cc in the state of being subjected to the heat treatment. When, for example, a PTFE (polytetrafluoroethylene) film is adhered with a mixture of a silicone varnish and a silicone rubber, the adhesion is uniformly performed over the entire adhered surface. For this reason, the pores of the porous PTFE film are filled with the silicone varnish at a predetermined ratio, and the air permeability of the PTFE film increases. Note that the ratio of the holes filled with the adhesive, that is, the air permeability, can be controlled by the mixing ratio of the silicone varnish and the silicone oil. Here, the "air permeability" is a Gurley number (unit: second / 100 cc) measured by a B-type Gurley densometer. The oil is eluted from the layer surface with toluene, and the air permeability is measured with only the adhesive remaining. 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.

Next, a typical method for manufacturing the oil application roller of the present invention will be described. First, a porous cylindrical oil holding member is prepared. That is, the porous cylindrical oil holding member is made of a heat-resistant fiber having a fiber diameter of about 2 to 15 μm, a water-resistant granular organic substance for forming pores, a suitable binder, and, if necessary, the porous cylindrical oil. An inorganic filler for adjusting the inter-fiber void amount of the holding member is blended in a desired ratio, and a mixture obtained by adding an appropriate amount of water and mixing is formed into a desired shape. Examples of the heat-resistant fiber include aluminosilicate fiber, alumina fiber, glass fiber, and aramid fiber. Examples of the water-resistant granular organic substance include a granular synthetic resin, wood powder, and carbon powder. Specific examples of the mixing ratio of each raw material include heat-resistant fiber 1
00 parts by weight, 10 to 300 parts by weight of the water-resistant granular organic substance, and 2 to 300 parts by weight of the binder.

The obtained molded body is dried and cured under heating, and further calcined at about 200 to 500 ° C. or about 400 to 1000 ° C. when an inorganic binder is used in combination to burn or decompose the particulate organic matter. When it is lost by gasification,
Thereafter, air holes having a diameter of 50 to 2000 μm are formed.
Next, an air vent groove or an air vent hole communicating with both end surfaces is formed. The formation of the air vent groove or the air vent hole may be a method of mechanically cutting after completion of the molded body, or a method of simultaneously forming the molded body at the time of molding.

In the above steps, selection of raw materials, mixing ratio,
By selecting molding conditions and the like, the fired molded body has an air vent groove or air vent hole, and has a hole diameter of 0.05 to
A pore group having a diameter of 2 mm and an inter-fiber communication gap having a pore diameter of preferably 5 to 30 μm are formed, so that the total porosity is 30 to 90 μm.
%, Preferably about 70-85%. Thus, a large amount of oil can be held while ensuring mechanical strength, and the held oil can be smoothly discharged. Further, the expansion of the air due to the heating at the start of the sheet passing can be buffered, and an escape path for the air can be formed.

The obtained porous cylindrical oil holding member was
The viscosity at 5 ° C is 50 to 1000 cSt, preferably 50 to 3
The silicone oil is impregnated by dipping in a low viscosity silicone oil of 00 cSt so that most of the pores in the holding member are filled with the silicone oil.

Thereafter, a heat-resistant fiber felt having a desired thickness and a width larger than that of the porous cylindrical oil holding member is attached to the oil application side and the end side of the porous cylindrical oil holding member. I do. A tape-shaped fiber felt is spirally wound around the outer periphery of the porous cylindrical oil holding molded body so that the edges thereof are joined so that there is no gap, or the width is slightly overlapped with the spiral wound, and tension is applied. Wrap. At this time, an adhesive such as RTV rubber is spirally applied to the surface of the porous cylindrical oil holding member, and the porous cylindrical oil holding member and the heat resistant fiber felt are bonded.

Finally, the above-mentioned oil coating amount control layer of the porous membrane is attached to or wound around the oil-applied side and the end side of the heat-resistant fiber felt, and the whole is covered except for the shaft. The fixing (attachment) method is not particularly limited, but it is possible to adhere the heat-resistant fiber felt and the oil application amount control layer using a mixture of silicone varnish and silicone oil as an adhesive without causing uneven oil application.
In addition, it is preferable in that an oil application roller can be obtained in which the oil application amount control layer does not shift or peel off during operation and can be easily adhered to the oil holding member. The layer for controlling the amount of oil applied to the porous film is preferably made of polytetrafluoroethylene. As the porous membrane made of polytetrafluoroethylene, those having various characteristics having different pore sizes, amounts, film thicknesses, and the like are commercially available, and those used in the present invention can be easily obtained. Examples of commercially available products include “Poaflon” (trade name, manufactured by Sumitomo Electric Industries, Ltd.).

Before or after bonding the oil application amount control layer of the porous film around the heat resistant fiber felt, an internal pressure is applied to the end of the oil application amount control layer or the outer peripheral surface that does not contact the fixing roller. Air vent holes for escape are provided as necessary. Further, the air vent hole may be provided so as to penetrate the oil transfer layer at the same time. The diameter of the air vent hole is not particularly limited, but may be, for example, about 0.8 mm.

The oil application roller of the present invention obtained by the above method is mounted on a support shaft for use in a fixing roller of a copying machine or a printer, and is used in use.

[0030]

EXAMPLES Next, the present invention will be described more specifically with reference to examples, but this is merely an example and does not limit the present invention. Example 1 50 parts by weight of silica alumina fiber having a fiber diameter of about 10 μ and a fiber length of 3 mm, 10 parts by weight of silica sol, 20 parts by weight of polyethylene resin particles having a particle diameter of 300 μm, and methyl cellulose 15
Parts by weight and 50 parts by weight of water were kneaded, and the kneaded material was extruded to obtain a columnar molded body having a length of 300 mm and a diameter of 33 mm. Next, it is dried at 120 ° C. for 2 hours, and further dried for 4 hours.
Firing was performed at 80 ° C. for 8 hours to obtain a porous molded body. In this firing step, the polyethylene resin particles were burned off, and an air hole group having an average diameter of 300 μm was formed. As shown in FIGS. 4 and 5, the porous molded body was symmetrically formed with two through grooves (3 mm in width and 9 mm in depth) on both sides communicating with both ends in the axial direction as shown in FIGS. At the same time, a shaft hole for inserting a shaft was formed at the center of the porous molded body. Next, the shaft was fitted, and then the outer peripheral surface and the end of the porous molded body were covered with a felt layer and a PTFE film. The felt layer was formed by spirally winding a ribbon-shaped felt having a thickness of 2 mm (density of 300 g / m ² ) and a width of 3 mm and having RTV silicone rubber applied to the edge thereof around a porous molded body. A commercially available PTFE membrane was used and bonded to the felt layer with an adhesive obtained by mixing silicone oil and silicone wax. Also, the felt layer and P
Both TFE films were bent so as to cover the end of the oil holding member. At this point, the vicinity of the shaft was opened for later impregnation with oil. Next, an air vent hole was formed at the end of the PTFE film in the lateral direction of the through groove. Then, the roller object was placed in a reduced pressure container, and was impregnated with silicone oil, which was a release oil. Finally, insert a washer to seal the end, and
The TFE film was fixed to obtain an oil application roller. The obtained oil application roller was subjected to the following continuous printing paper passing test. FIG. 6 shows the results.

(Continuous printing paper passing test) Test apparatus: Color printer LP-8000C (manufactured by Seiko Epson Corporation) Test conditions: Color continuous paper passing 4 sheets / min. Evaluation method: A4 A4 plain paper oil application amount per sheet ( mg
/ Sheets). The amount of oil applied per sheet was determined by dividing the weight reduction of the oil application roller by the number of sheets passed.

Comparative Example 1 The same procedure as in Example 1 was carried out except that no through groove was formed in the porous molded body and no air vent hole was formed at the end of the PTFE film. FIG. 6 shows the results.

From the results shown in FIG. 6, when the through groove is provided, the amount of oil applied can be made constant regardless of the number of sheets. Further, when the through groove was not provided, excessive oil application was performed in the initial stage of the sheet passing up to 1500 sheets.

[0034]

According to the present invention (1), even if the oil held in the oil application roller or the air in the gap is thermally expanded by the heating from the heat fixing roll in the initial stage of paper feeding, the oil application is performed. The pressure increase in the roller is buffered by the air vent hole or the air vent groove, so that the applied amount of the release oil does not become excessively large.

According to the present invention (2), in the oil application roller provided with the oil application control layer, the air vent hole and the air vent hole or the air vent groove are in communication with each other, and the escape of the expanded air is efficiently performed. . According to the present invention (3), the same effect as that of the above-described invention can be obtained in an oil application roller having an oil transfer layer such as a felt layer.

[Brief description of the drawings]

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

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

FIG. 3 is a partial cross-sectional view of the oil application roller according to the first embodiment in an axial direction.

FIG. 4 is a radial cross-sectional view of an oil application roller according to a second embodiment.

FIG. 5 is a cross-sectional view of a part of an oil application roller according to a second embodiment in an axial direction.

6 shows the results of a paper passing test in Example 1 and Comparative Example 1. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil application roller 2 Porous cylindrical oil holding member 3 Oil application amount control layer 4 Fixing roller 5 Heating fixing roll 6 Pressure roll 7 Recording paper 7a Surface 8 Toner 9 Through hole (air vent hole) 10 Shaft 11 Oil transfer layer 12 Air vent hole 91 Through groove (groove for air release)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yosuke Suganuma 1-8-1 Shintoda, Nichias, Hamamatsu-shi, Shizuoka Nichias Inside Hamamatsu Research Institute Co., Ltd. (72) Inventor Shigeru 1-8-1, Shintoda, Hamamatsu-shi, Shizuoka, Nichias F-term in Hamamatsu Laboratory Co., Ltd. (reference) 2H033 AA09 AA23 AA32 BA43 BA46 3J103 AA02 AA15 AA33 AA51 AA71 BA41 BA48 EA07 EA09 FA07 FA18 FA24 GA02 GA52 GA73 HA01 HA03 HA04 HA18 HA19 HA41 HA42 HA43 HA51 HA54 HA60 402

Claims (3)

[Claims] 1. An oil impregnated with a release oil and having a porous cylindrical oil holding member having an air vent groove or an air vent hole communicating with at least one end face along the axial direction. Application roller. 2. A porous cylindrical oil holding member having an air release groove or an air release hole communicating with at least one end surface along an axial direction while being impregnated with a release oil. An oil application roller provided with an oil application control layer, for releasing an internal pressure passing through the air vent groove or the air vent hole to an end portion of the oil application amount control layer or an outer peripheral surface not in contact with the fixing roller. An oil application roller having an air vent hole. 3. A porous cylindrical oil holding member which is impregnated with a release oil and has an air vent groove or air vent hole communicating with at least one end face along the axial direction. An oil application roller provided with an oil transfer layer, and further provided with an oil application amount control layer on the oil application side and an end portion thereof, wherein the oil transfer layer or the end of the oil application amount control layer or An oil application roller provided with an air vent hole on an outer peripheral surface not in contact with the fixing roller for releasing an internal pressure passing through the air vent groove or the air vent hole.