JP5188935B2 - Electrophotographic brush - Google Patents

Description

  The present invention relates to an electrophotographic brush used in an image forming apparatus that employs an electrophotographic system.

2. Description of the Related Art Conventionally, some image forming apparatuses that employ an electrophotographic method employ a bar-type brush (sheet metal pasting brush) to clean or remove the toner remaining on a photosensitive drum after transfer. For example, the neutralizing brush 110 disclosed in Patent Document 1 is a bar-type brush for neutralizing toner remaining on the photosensitive drum 102 after being transferred to the recording paper 101 as shown in FIG. That is, the static elimination brush 110 is comprised by the bar-shaped base material 111 and the flocked part 112 which consists of the fiber material planted on the surface of this base material 111, and the back surface of the bar-shaped base material 111 is cleaning. It is fixed (pasted) to the wall surface 121 of the device 120. The tip of the flocked portion 112 is in contact with the photosensitive drum 102 which is a contacted body.
JP 2003-316202 A (published November 7, 2003)

  However, the static eliminating brush 110 as the electrophotographic brush disclosed in the above-described conventional Patent Document 1 has the following problems.

  That is, the use of the neutralizing brush 110 of the bar-type brush based on the prior art easily causes problems such as scratches on the photoreceptor drum 102 as a contacted body and insufficient toner passage. This is one of the causes of defects in quality assurance of image-formed products that are photographs.

  The above problem is caused by the fact that the static elimination brush 110 has a bar-type brush structure. That is, in the static elimination brush 110 made of a bar-type brush, the flocked portion 112 is flocked over substantially the entire surface of the substrate 111, and the entire back surface of the substrate 111 is fixed to the wall surface 121 of the cleaning device 120. Therefore, when the static eliminating brush 110 brushes the surface of the photosensitive drum 102, the flocked portion 112 receives a pressing force from the photosensitive drum 102, and at this time, the back surface of the flocked portion 112 is cleaned via the substrate 111. Since the allowable width for the amount of biting of the brush is very narrow on the surface side of the flocked portion 112, the photosensitive drum 102 receives a pressing force as a great repulsive force. As a result, the surface of the photosensitive drum 102 is damaged at the tip of the flocked portion 112, or the flocked portion 112 is compressed and the gap between the flocked portions 112 disappears, resulting in insufficient toner passage.

  Moreover, since the static elimination brush 110 disclosed by the conventional patent document 1 is a bar-type brush affixed on the sheet metal, the parameters which control the performance of a bar-type brush are fiber length, fiber material, and fineness degree. However, since it cannot be changed once determined, the adjustment range of the pressing force is very narrow.

  In order to prevent the occurrence of the above problem, a method of expanding the allowable range for the amount of biting of the brush by introducing elastic parts such as a spring can be considered, but since the structure of the brush becomes complicated, it should be managed New issues such as increased items and costs, design restrictions, and so on.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electrophotographic brush that can easily adjust the pressing force easily and at low cost.

In order to solve the above-described problems, an electrophotographic brush according to the present invention includes a brush body that is provided on at least a part of the surface of an elastic film and is in contact with a contacted body. On the other hand, the film has a pressing force adjusting function by bending of the film, and the film has a curved shape . In the present invention, the film is supported in a cantilever shape or a both-end support beam shape with the brush body in contact with the contacted body.

  In the conventional bar-type brush, the parameters for controlling the pressing force are only the length of the fiber, the fiber material, and the fineness, and in a state where a large pressing force is applied to the contacted member, for example, the photosensitive member, When it deteriorates, the bristle is hardened, and a larger pressing force acts on the photoconductor, thereby damaging the photoconductor and causing insufficient toner passage.

  In this regard, in the present invention, since a part of the pressing force is absorbed by the bending of the elastic film as the base material, it is possible to avoid an excessive pressing force acting on the contacted body.

  In the present invention, the parameter for controlling the pressing force is increased, and the adjustable range is greatly expanded. This makes it possible to optimize the pressing force and improve the performance.

  In addition, since a separate part such as a spring is not introduced for imparting elasticity, the structure of the brush is simple, and an increase in items to be managed and costs can be avoided.

  As a result, it is possible to provide an electrophotographic brush that can adjust the pressing force easily and appropriately at low cost.

Further, in the electrophotographic brush of the present invention, the film has a curved shape, the curved shape, eg, L-shaped, dog-legged shape, and the like U-shape.

  According to the above configuration, since the curved film is more flexible than the flat film, the adjustment range of the pressing force can be increased, and the contacted object can be prevented from being scratched and the toner passing property can be improved. Connected. In addition, since the installation area is reduced, the space can be reduced.

  In the electrophotographic brush of the present invention, the film can be formed of a polymer material or a metal material.

  According to the above configuration, there are various types of polymer materials or metal materials, and the type, thickness, elastic force, weight, length, shape, and the like of the material can be easily changed. Therefore, it is possible to easily and variously adjust the pressing force.

  In the brush for electrophotography of the present invention, the brush body may have brush hairs whose fiber material is made of conductive fibers.

  As a result, when the electrophotographic brush is applied to, for example, a static elimination brush, the residual toner and, for example, the photoreceptor can be efficiently charged.

  In the present invention, it is preferable that both or one of the film and the adhesive is conductive. As a result, for example, charge can be efficiently applied to the residual toner and the photoreceptor.

  In the electrophotographic brush of the present invention, a voltage can be applied to the brush hair.

  As a result, a voltage can be applied to the brush bristles to efficiently charge the residual toner and, for example, the photoreceptor.

  In the brush for electrophotography of the present invention, the brush body may have brush hair electrostatically flocked to the film.

  That is, with the conventional bar-type brush, it has been very difficult to produce an electrophotographic brush with an electrostatic flocking brush for the following reason.

  First, the length of the bristle is limited to about 3 mm or less, and the flocking density of the bristle is high, and is sandwiched between the fixed substrate and the contacted body. The pressing force becomes very large. Secondly, since the length of the bristle is short, the increasing rate of the pressing force due to the change in the amount of biting becomes remarkably large. As a result, it is necessary to manage the tolerance of the length of the bristle and the installation location very precisely.

  On the other hand, in the present invention, the electrophotographic brush is an electrostatic flocking brush that has a function of adjusting the pressing force by bending the film against the contacted body.

  Therefore, since the film which is a base material can bend, even if it is an electrostatic flocking brush, pressing force does not become very large. In addition, regarding the problem that the increase rate of the pressing force due to the change in the amount of biting becomes significantly large due to the short length of the brush hair, the change rate of the biting amount is small, so the increase rate of the pressing force is significantly increased. There is nothing.

  Thereby, since there is no problem even if the electrophotographic brush is produced by electrostatic flocking, an excellent electrophotographic brush using electrostatic flocking can be provided.

  In the electrophotographic brush of the present invention, the brush body made of a fabric produced by pile weaving can be attached. The pile weave refers to a woven fabric in which a pile is woven on the surface of the woven fabric by using a warp or weft for pile (Wanna) separately from the ground yarn. Moreover, the thing which consists of a cut pile which cut the front-end | tip of a pile (Wana) is included.

  Thereby, it becomes possible to apply also to the brush body which consists of the fabric produced by the pile weave.

  As described above, the electrophotographic brush of the present invention includes a brush body that is provided on at least a part of the surface of an elastic film and is in contact with the contacted body, and the film with respect to the contacted body. It has a pressing force adjustment function by bending.

  Therefore, it is possible to provide an electrophotographic brush that can adjust the pressing force easily and appropriately at low cost.

  The embodiment of the present invention will be described with reference to FIGS. 1 to 7 as follows.

  FIG. 1 is a plan view schematically showing the structure of an image forming apparatus that employs an electrophotographic system using the electrophotographic brush of the present embodiment.

  The image forming apparatus outputs data read by a scanner included in the image forming apparatus or data from an external device (for example, an image processing apparatus such as a personal computer) connected to the image forming apparatus as an image that is an electrophotographic image. To do.

  As shown in FIG. 1, the image forming unit 40 includes a photosensitive drum 1, a charging brush 2, an exposure device 3, a developing device 10, a transfer brush 4, a transport belt 5, a static elimination brush 20, and a cleaning. And a charging brush 2, an exposure device 3, a developing device 10, a transfer brush 4 and a conveying belt 5, a static elimination brush 20, and a cleaning device 30 around the photosensitive drum 1 in the rotation direction. Are arranged in this order. The function of each component is as follows.

  The photosensitive drum 1 is a contacted body of the present invention in the image forming apparatus and has a cylindrical shape. The charging brush 2 is for making physical contact with the photosensitive drum 1 to uniformly charge the surface of the photosensitive drum 1 to a predetermined potential. The charging brush 2 is disposed adjacent to and opposed to the photosensitive drum 1 with the rotation axes thereof being parallel to each other.

  The exposure device 3 exposes the surface of the photosensitive drum 1 charged by the charging brush 2 with a laser beam or the like based on data from an image processing apparatus such as a personal computer, for example, so that the surface of the photosensitive drum 1 is statically exposed. This is for forming an electrostatic latent image. As the exposure apparatus 3, for example, a semiconductor laser or a light emitting diode can be used.

  The developing device 10 supplies a developer to the surface of the photosensitive drum 1, and develops, that is, develops the electrostatic latent image formed on the surface of the photosensitive drum 1 as a developer image. The conveyance belt 5 is for conveying a recording medium 6 such as PPC (Plain Paper Copy) paper to the photosensitive drum 1 after a developer image is formed on the surface of the photosensitive drum 1. The transfer brush 4 is for transferring the developer image on the surface of the photosensitive drum 1 to the recording medium 6. The neutralizing brush 20 is for neutralizing the surface of the photosensitive drum 1. The neutralizing brush 20 will be described in detail later.

  The cleaning device 30 includes a cleaning brush 31, a solid lubricant supply device 32, and a cleaning blade 33, and is for removing developer and paper dust remaining on the surface of the photosensitive drum 1.

  In the image forming apparatus configured as described above, image formation is performed in the following cycle.

  First, the surface of the photosensitive drum 1 is uniformly charged by contacting the charging brush 2. The photosensitive drum 1 whose surface is charged is exposed based on data by the exposure device 3, and an electrostatic latent image is formed on the surface of the photosensitive drum 1. Then, the developer is supplied to the surface of the photosensitive drum 1 by the developing roller 12 via the developer supply roller 11 of the developing device 10, and the electrostatic latent image on the surface of the photosensitive drum 1 is developed and visualized. Is done. Subsequently, the recording medium 6 is conveyed to the photosensitive drum 1 by the conveyance belt 5, and the developer image on the surface of the photosensitive drum 1 is transferred to the recording medium 6 by the transfer brush 4. The photosensitive drum 1 after the transfer is neutralized by the neutralizing brush 20. After the static elimination, the photosensitive drum 1 is coated with a solid lubricant on the surface by a cleaning brush 31 coated with a solid lubricant. Residual developer, paper dust, and the like are removed by a cleaning brush 31 and a cleaning blade 33. Removed.

  Next, the static elimination brush 20 of this Embodiment is demonstrated in detail based on FIG.

  As shown in FIG. 1, the static eliminating brush 20 of the present embodiment forms a brush hair 22a by flocking a fiber material on the surface of the distal end portion of an elastic film 21a curved in an approximately L shape. One end of the film 21a is supported by the wall surface 34 of the cleaning device 30 as a support. As a result, the film 21a is supported in a cantilever shape.

  In the present embodiment, by using the elastic film 21a as a base material for planting the brush hairs 22a, a part of the pressing force from the photosensitive drum 1 to the brush hairs 22a is absorbed by the film 21a. The pressing force applied to the photosensitive drum 1 is reduced.

  Here, the material used for the film 21a can be selected according to the purpose. For example, when low pressing is optimal, a polymer material such as polyester that can easily be adjusted in pressure can be used.

  Further, the elastic modulus of the film 21a can be changed as appropriate. For example, even if the material of the film 21a is the same, the elastic modulus of the film 21a can be changed by changing the size and thickness. The elastic modulus can also be adjusted by changing the shape of the film. For example, the L-shaped film 21a in the present embodiment is more elastic than the plate-shaped film 21a having the same material and the same dimensions. Thus, in this Embodiment, there are many parameters which adjust the elasticity of the film 21a, and the error tolerance | permissible_range with respect to the biting amount of the bristle 22a is large compared with the prior art. Accordingly, it is possible to prevent the surface of the photosensitive drum 1 from being damaged or the toner from being insufficiently passed.

  In addition, this invention is not limited to said embodiment, A various change is possible within the scope of the present invention. For example, in the above embodiment, the film 21a of the static elimination brush 20 is curved in an L shape, but is not particularly limited to this, for example, as shown in FIG. It is possible to make the film 21b in a “shape” having a smaller degree of curvature than that of the film 21b. Also by this, it can be set as the static elimination brush 20 excellent in elasticity.

  Further, as shown in FIG. 3, the brush hairs 22 c can be planted on the entire surface of the plate-shaped film 21 c facing the photosensitive drum 1. In this case as well, the film 21c is supported on the wall surface 34 of the cleaning device 30 in a cantilever shape.

  Thereby, the flocking width is wide, the contact area between the brush bristles 22b and the photosensitive drum 1 is wide, and the working efficiency can be improved.

  Moreover, instead of the brush hair 22c planted on the entire surface of the film 21c in FIG. 3, it is possible to plant the brush hair 22d on a part of the surface of the film 21d as shown in FIG. Thereby, the area of the bristle 22d can be reduced.

  Furthermore, although all the above-mentioned films 21a-21d were supported by the wall surface 34 of the cleaning apparatus 30 in the shape of a cantilever, it is not necessarily restricted to this, For example, as shown in FIG. It can be assumed that the shaped film 21e is supported in the shape of a beam supported at both ends. In this case, the bristles 22e are planted on a part of the surface of the film 21e so as to face the photosensitive drum 1 between the support body with the wall surface 34.

  In this type of static elimination brush 20, since both ends of the film 21e are supported, it is possible to provide the static elimination brush 20 having a more stable pressing force while maintaining a certain elasticity. Accordingly, it is possible to obtain a wide nip width with uniform pressure with respect to the cylindrical photosensitive drum 1.

  In the present embodiment, only the static eliminating brush 20 as the electrophotographic brush has been described. However, the present invention is not limited to this, and the cleaning brush, transfer roller, The present invention can be applied to the charging roller 2, the charge control brush, the paper dust removing brush, the developing device or the discharging brush for discharging, and the doctor blade. Therefore, the elastic modulus and the pressing force of the films 21a to 21e may be increased as well as decreased in accordance with various specific uses of the electrophotographic brush.

  The cleaning brush can be applied not only to the photosensitive drum 1 but also to the transfer belt 5.

  Thus, the static elimination brush 20 of this Embodiment is equipped with the brush hair 22a-22e planted by the at least one part of the surface of the films 21a-21e which have elasticity as a base material, and contact the photoreceptor drum 1 In addition, it has a function of adjusting the pressing force by bending the films 21 a to 21 e with respect to the photosensitive drum 1. In this embodiment, the films 21a to 21e are supported in a cantilever shape or a both-end support beam shape with the bristles 22a to 22e in contact with the photosensitive drum 1. In other words, the neutralizing brush 20 is in contact with the photosensitive drum 1 whose non-supporting portion is the contacted body and the opposite object.

  By the way, in the conventional bar-type brush, the parameters for controlling the pressing force are only the length of the fiber, the fiber material and the fineness, and a state in which a large pressing force is applied to the contacted object, for example, the photosensitive drum. However, when the aging deteriorates, the bristle is hardened and a larger pressing force acts on the photosensitive drum, so that the photosensitive member is damaged and toner passing is insufficient. Further, the pressing pressure is very strong, and the error with respect to the amount of biting is strict.

  In this respect, in the present embodiment, a part of the pressing force is absorbed by the bending of the elastic films 21 a to 21 e, so that it is possible to avoid an excessive pressing force acting on the photosensitive drum 1. it can.

  That is, the contact of the static elimination brush 20 with the photosensitive drum 1 becomes a soft touch, and the toner passage is improved. Moreover, since the pressing force to the photosensitive drum 1 is reduced, it is possible to prevent the torque of the photosensitive drum 1 from being lowered. Furthermore, the allowable range of the setting error can be increased with respect to the amount of biting of the static elimination brush 20 into the photosensitive drum 1.

  Moreover, the set value of the pressing force of the static elimination brush 20 can be greatly expanded by the film thickness of the films 21a to 21e, the film hardness, the adhesion position, the facing distance from the photosensitive drum 1, or the like. In addition, each of these elements can be suitably selected according to the application location of the electrophotographic brush and the material type of the films 21a to 21e.

  Further, it is possible to provide a difference in the pressing force depending on the bonding angle of the films 21a to 21e, the contact position of the brush bristles 22a with the photosensitive drum 1, and the like. As a result, the introduction portion to the cleaning device 20 can be set to a weak pressing force, and the toner can be easily passed through the brush.

  In addition, since a separate part such as a spring is not introduced for imparting elasticity, the structure of the brush is simple, and an increase in items to be managed and costs can be avoided.

  As a result, it is possible to provide the neutralizing brush 20 that can appropriately adjust the pressing force easily and at low cost.

  The films 21a to 21e have elasticity even if the film thickness is very thin, and have a pressing force adjusting function by bending within the elastic range. As a result, the contact nip can be adjusted. That is, in the prior art bar-type brush, the contact nip width with the contacted body is limited due to the shape, and thus cannot always be set with the optimum contact nip width. However, in the present embodiment, for example, the film 21e shown in FIG. 5 can be bent along the arc of the photosensitive drum 1 by adjusting the elastic force of the film 21e. The contact nip width can be arbitrarily adjusted. For this reason, the static elimination brush 20 can be used with an optimal setting value.

  Here, in the static elimination brush 20 of this Embodiment, it can be assumed that the bristle 22c is flocked to the whole surface of the film 21c. Thereby, since the contact surface of the bristle 22c and the photosensitive drum 1 becomes wider, working efficiency can be improved.

  Moreover, in the static elimination brush 20 of this Embodiment, it can be assumed that the films 21a-21b have a curved shape. The curved shape includes, for example, an L shape, a “shape” shape, a U shape, and the like. Since the curved films 21a to 21b are more flexible than the flat film, the adjustment range of the pressing force can be increased, which leads to prevention of scratches on the photosensitive drum 1 and improvement in toner passage. . In addition, since the installation area is reduced, the space can be reduced.

  Moreover, in the static elimination brush 20 of this Embodiment, it can be assumed that the films 21a-21e are formed with the polymeric material or the metal material. That is, there are various kinds of polymer materials or metal materials, and the kind, thickness, elastic force, weight, length, shape, and the like of the material can be easily changed. Therefore, it is possible to easily and variously adjust the pressing force according to the application. As the polymer material, polyester, nylon, acrylic, vinyl chloride, carbon, rubber, and other polymer materials can be used. As the metal material, iron, copper, gold, silver, aluminum, zinc, tin, lead, alloys thereof, and other metal materials can be used.

  Moreover, in the static elimination brush 20 of this Embodiment, as for the bristle 22a-22e, the fiber material consists of conductive fibers. As a result, when the electrophotographic brush is applied to, for example, the charge eliminating brush 20, the residual toner and the charge to the photosensitive drum 1 can be efficiently applied.

  Moreover, even if the films 21a to 21e are insulative, conduction is possible. In this embodiment, the bristle bristles 22a to 22e are made of conductive fibers. However, the present invention is not limited to this. That is, depending on the use of the electrophotographic brush, the brush hairs 22a to 22e may be insulative. Furthermore, it is possible to impart conductivity also to an adhesive (not shown) for bonding the brush bristles 22a to 22e to the films 21a to 21e.

  Moreover, in the static elimination brush 20 of this Embodiment, as shown in FIG. 1, the voltage 23 is applied to the bristle 22a-22e of the static elimination brush 20. As shown in FIG. As a result, a voltage can be applied to the brush bristles 22a to 22e to efficiently apply electric charges to the residual toner and the photosensitive drum 1.

  Moreover, in the static elimination brush 20 of this Embodiment, it has the brush hair 22a-22e electrostatically flocked to the film.

  That is, with the conventional bar-type brush, it has been very difficult to produce an electrophotographic brush with an electrostatic flocking brush for the following reason.

  First, the length of the bristle is limited to about 3 mm or less, and the flocking density of the bristle is high, and is sandwiched between the fixed substrate and the contacted body. The pressing force becomes very large. Secondly, since the length of the bristle is short, the increasing rate of the pressing force due to the change in the amount of biting becomes remarkably large. As a result, it is necessary to manage the tolerance of the length of the bristle and the installation location very precisely.

  On the other hand, in the present embodiment, the static elimination brush 20 is an electrostatic flocking brush that has a pressing force adjusting function by bending the films 21a to 21e with respect to the photosensitive drum 1.

  Therefore, since the films 21a to 21e as the base material can be bent, the pressing force does not become very large even with the electrostatic flocking brush. Further, regarding the problem that the increase rate of the pressing force due to the change in the amount of biting becomes large due to the short length of the brush hairs 22a to 22e, the change in the amount of biting becomes small, so the increase rate of the pressing force is remarkable. It doesn't get bigger.

  Thereby, since there is no problem even if the static elimination brush 20 is produced by electrostatic flocking, an excellent static elimination brush 20 using electrostatic flocking can be provided.

  Moreover, in the static elimination brush 20 of this Embodiment, it can be assumed that the brush body which consists of the fabric produced by the pile weave is affixed. The pile weave refers to a woven fabric in which a pile is woven on the surface of the woven fabric by using a warp or weft for pile (Wanna) separately from the ground yarn. Moreover, the thing which consists of a cut pile which cut the front-end | tip of a pile (Wana) is included.

  Thereby, it becomes possible to apply also to the brush body which consists of the fabric produced by the pile weave.

  In order to confirm the performance of the static elimination brush 20 of this Embodiment, the following tests were done.

  That is, a durability test was performed on the conventional bar-type brush shown in FIG. 6A and the charge control brush having the function of the static elimination brush 20 of the present embodiment shown in FIG. 6B. The charge control brush is a brush that applies a brush to “+” in advance and controls the charge of +/− mixed toner after transfer to the photosensitive drum 1 to be “+”.

  In the durability test, under the evaluation specifications shown in Table 1, the charge amount after cleaning in each photosensitive drum 1 when 3000 sheets were printed was evaluated in comparison with the conventional example. In Table 1, the distance refers to the distance between the member on which the brush is installed and the contacted body. In the case of a bar-type brush, there is a relationship of pile length−distance = biting amount.

  As a result, as shown in FIG. 7, when the conventional bar-type brush was used, it was clear that after 3000 sheets of paper were printed, toner clogging occurred and the brush performance deteriorated. It was. On the other hand, in the examples, the change in charging performance was small.

  The present invention can be applied to an electrophotographic brush that can easily adjust the pressing force at low cost. Specifically, it can be applied to a cleaning brush as an electrophotographic brush, a transfer roller, a charging roller, a charge control brush, a paper dust removing brush, a developing device or a discharging brush for discharging paper in addition to a discharging brush. It is.

  Further, the cleaning brush can be applied not only to a photosensitive drum but also to a cleaning brush for a transfer belt.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of an electrophotographic brush according to the present invention, and is a configuration diagram illustrating an image forming apparatus using an electrophotographic brush. It is sectional drawing which shows the structure of the modification in the static elimination brush as said brush for electrophotography. It is sectional drawing which shows the structure of the other modification in the static elimination brush as the said brush for electrophotography. It is sectional drawing which shows the structure of the further another modification in the static elimination brush as the said brush for electrophotography. It is sectional drawing which shows the structure of the further another modification in the static elimination brush as the said brush for electrophotography. (A) is sectional drawing which shows the conventional bar-type brush used for the performance test, (b) is sectional drawing which shows the static elimination brush of a present Example used for the performance test. It is a graph which shows the performance test result of the static elimination brush of a present Example by the comparison with the conventional bar-type brush. It is a block diagram which shows the image forming apparatus using the bar-type brush in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photosensitive drum 2 Charging brush 3 Exposure apparatus 4 Transfer brush 5 Conveying belt 6 Recording medium 10 Developing apparatus 11 Developer supply roller 12 Developing roller 20 Static elimination brush 21a Film 21b Film 21c Film 21d Film 21e Film 22a Brush bristle 22b Brush bristle 22c Brush hair 22d Brush hair 22e Brush hair 23 Voltage 30 Cleaning device 31 Cleaning brush 32 Solid lubricant supply device 33 Cleaning blade 34 Wall surface 40 Image forming device

Claims (6)

The brush body is provided on at least a part of the surface of the film having elasticity and is brought into contact with the contacted body, and has a pressing force adjustment function by bending of the film with respect to the contacted body , An electrophotographic brush , wherein the film has a curved shape . The film is an electrophotographic brush according to claim 1, characterized in that it is formed by a polymeric or metallic material. The brush for electrophotography according to claim 1 or 2 , wherein the brush body has brush hairs in which the fiber material is made of conductive fibers. 4. The electrophotographic brush according to claim 3 , wherein a voltage is applied to the brush bristles. The brush for electrophotography according to any one of claims 1 to 4 , wherein the brush body has brush hair electrostatically implanted in the film. The brush for electrophotography according to any one of claims 1 to 4 , wherein the brush body made of a fabric produced by pile weaving is pasted.

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