JP4887898B2 - Coating apparatus and image forming system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the scratch resistance of a toner image fixed on the continuous paper P, by supplying appropriate amount of lubricant to the continuous paper P. <P>SOLUTION: Each rotary brush 50 scrapes a solid lubricant 42 and applies it onto continuous paper P with toner images fixed thereon. Thus, the lubricant 42 applied onto the continuous paper P sticks to objects, with which the continuous paper P comes into contact, and decreases frictional force caused between the objects and the continuous paper P. This improves the scratch resistance of the toner images fixed on the continuous paper P. In particular, this prevents the conveying belt, conveying roller, etc., of a post-processor 90 from coming into contact with the paper faces and soiling the continuous paper P with, for example, a mark resulting from slippage. Since a water-soluble lubricant is apt to infiltrate the continuous paper P and these may be cases where supply to the continuous paper P becomes excessive, although, the solid lubricant 42 is less likely to be supplied in excessive manner, and the amount of lubricant 42 to be supplied is adjusted easily, an appropriate amount of lubricant 42 can be supplied to the continuous paper P. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a coating apparatus that applies a lubricant to the surface of a recording medium and an image forming system including the coating apparatus.

  For printed matter, particularly printed matter such as newsprint printed at a high speed by offset printing, a countermeasure is required so as not to cause contamination due to rubbing of the paper surface immediately after printing. As a countermeasure, a lubricant for a printing process is used, which can be applied to the surface of a printed material immediately after printing to impart smoothness and suppress contamination due to rubbing. Conventionally, as this lubricant for a printing process, an aqueous emulsion containing a wax and a higher fatty acid ester of a polyhydric alcohol or an emulsion mainly composed of oxidized polyethylene or a higher fatty acid ester is known (see Patent Documents 1 and 2).

On the other hand, also in the electrophotographic printing field, a technique for uniformly applying an appropriate amount of lubricant to an image carrier or intermediate transfer member is known as a lubricant supply device in an image forming apparatus (see Patent Document 3).
JP-A-5-85074 Japanese Patent Publication No. 1-333359 JP 7-295451 A

  However, in recent years, electrophotographic printing apparatuses have been developed due to technological innovations, so that apparatuses capable of printing in large quantities and at high speed have been developed, and countermeasures are required to prevent the above-described smear due to rubbing of the paper surface immediately after printing. It became so. In some processes such as cutting and bookbinding after printing a sheet, the surface of the sheet may be rubbed with a roller or a belt for conveying the sheet.

  Since the lubricant used in Patent Documents 1 and 2 is water-soluble, when the recording medium stops in contact with the application means for applying the lubricant, the lubricant is excessively supplied. In particular, when coated paper or the like is used, uneven coating tends to occur, and spots or water droplets adhere to the surface. Therefore, water-soluble lubricants cannot handle a wide variety of papers. . In addition, a water-soluble lubricant requires a drying process in a subsequent process, and there is a problem of an increase in equipment cost and running cost.

  On the other hand, in the case of a lubricant supply device in the electrophotographic printing field as in Patent Document 3, a technique for uniformly applying a lubricant to an image carrier or an intermediate transfer member is sufficient for the image carrier and the intermediate transfer member. However, it is insufficient to apply to the surface of the printed material immediately after printing which passes at high speed, and there is a problem that it is difficult to always adhere a predetermined amount uniformly to the coating brush roller.

  In consideration of the above facts, the present invention supplies an appropriate amount of lubricant to a recording medium to improve the scratch resistance of a toner image fixed on the recording medium, and performs printing using the coating apparatus. The purpose is to provide a stem.

The coating apparatus according to the first aspect includes a solid lubricant, and a coating unit that scrapes the lubricant and applies the toner onto a recording medium on which a toner image is fixed.

  According to this configuration, the application unit scrapes off the solid lubricant and applies it to the recording medium on which the toner image is fixed.

  As a result, the lubricant applied on the recording medium adheres to the contact object that comes into contact with the recording medium, and reduces the frictional force generated between the contact object and the recording medium. For this reason, the scratch resistance of the toner image fixed on the recording medium can be improved.

  A water-soluble lubricant may easily penetrate into the recording medium, so the lubricant may be excessively supplied. However, with a solid lubricant, it is difficult to supply excessively and the supply amount is easy to adjust. It becomes possible to supply the agent to the recording medium.

The lubricants of this invention, can be used metallic soap or wax. The metal soaps may be used stearate zinc. As the wax, it is possible to use a port triethylene wax.

The coating apparatus according to a second aspect is characterized in that the coating means is a rotating brush that rotates to scrape the lubricant and coats the recording medium.

  According to this configuration, the rotating brush rotates to scrape off the lubricant and apply it to the recording medium. For this reason, the lubricant can be applied to the recording medium to be conveyed with a simple configuration.

The coating apparatus according to a third aspect includes a control unit that controls the amount of lubricant applied to the recording medium by changing the rotational speed of the rotating brush.

  According to this configuration, the control unit controls the amount of lubricant applied to the recording medium by changing the rotation speed of the rotating brush. Accordingly, the amount of lubricant applied to the recording medium can be adjusted with high accuracy with a simple configuration.

The coating apparatus according to the fourth aspect is characterized in that the peripheral speed of the rotating brush ÷ the conveyance speed of the recording medium = 0.85-6.

  According to this configuration, the peripheral speed of the rotating brush ÷ the conveyance speed of the recording medium = 0.85-6. For this reason, the lubricant is efficiently applied to the recording medium. When the above value is less than 0.85, the amount of lubricant applied to the recording medium is reduced. When the above value is more than 6, the brush of the rotating brush tends to drip and the lubricant adheres to the brush. This reduces the amount of lubricant applied to the recording medium.

The applicator according to the fifth aspect is characterized in that a peripheral speed of the rotating brush is 500 mm / sec to 3520 mm / sec.

  According to this configuration, since the peripheral speed of the rotating brush is 500 mm / sec to 3520 mm / sec, the lubricant is efficiently applied to the recording medium. When the peripheral speed is less than 500 mm / sec, the amount of lubricant applied to the recording medium is reduced, and when the peripheral speed exceeds 3520 mm / sec, the brush of the rotating brush is easy to sag. The lubricant becomes difficult to adhere, and the amount of the lubricant applied to the recording medium decreases.

The coating apparatus according to the sixth aspect is characterized in that the amount of biting between the rotating brush and the recording medium is 1.0 mm to 5.0 mm.

  According to this configuration, since the amount of biting between the rotating brush and the recording medium is 1.0 mm to 5.0 mm, the lubricant is efficiently applied to the recording medium. If the amount of biting is less than 1.0 mm, the contact area between the recording medium and the brush is reduced, so that sufficient lubricant cannot be applied to the recording medium. On the other hand, if the amount of biting exceeds 5.0 mm, the brush is applied to the back and the lubricant adhering to the vicinity of the tip does not rub against the recording medium, so that the lubricant cannot be sufficiently applied to the recording medium.

An image forming system according to a seventh aspect is an image forming system in which an image is formed on a continuous paper, and post-processing is performed on the continuous paper on which the image is formed. The lubricant is applied to the formed continuous paper by the coating apparatus according to any one of the first to sixth aspects, and the applied continuous paper is subjected to post-processing.

  Since the present invention has the above-described configuration, it is possible to improve the scratch resistance of the toner image fixed on the recording medium by supplying an appropriate amount of lubricant to the recording medium.

  Hereinafter, an example of an embodiment according to an application apparatus of the present invention and an image forming system including the application apparatus will be described with reference to the drawings.

  As shown in FIG. 1, an image forming system 10 according to this embodiment includes an image forming apparatus 12 that forms an image on a continuous paper (paper) P as a recording medium using an electrophotographic recording method, and an image is formed. A coating device 40 for applying the lubricant 42 to the continuous paper P, and a post-processing device 90 for performing post-processing on the continuous paper P to which the lubricant 42 is applied.

  The post-processing device 90 transports the continuous paper P by a paper transport unit constituted by a transport belt or the like, and also cuts the continuous paper P with a cutter or the like, or folds the continuous paper P, thereby bookbinding and sealing. In this case, the continuous paper P is subjected to post-processing.

  The paper transport unit of the post-processing apparatus includes, for example, a transport belt and a transport roll disposed so as to face the transport belt. The continuous paper P is sandwiched between the transport belt and the transport roll, and the transport belt is driven by a motor or the like. The continuous paper P is frictionally conveyed (friction feed) by being driven.

  The image forming apparatus 12 includes an apparatus housing 14, and a long shape in which a plurality of feed holes are formed on both side portions (side edge portions) in the width direction along the longitudinal direction on the side surface of the lower portion of the apparatus housing 14. A paper hopper (paper storage unit) 16 in which the continuous paper P is folded and stored is provided. Note that the continuous paper P is a recording medium formed in a long shape and folded for each page in order to continuously form images of a plurality of pages.

  A plurality of (for example, two) tractors (conveying means) 18 that convey the continuous paper P by engaging the tractor pins with the feed holes of the continuous paper P are provided at the lower portion of the apparatus housing 14. The tractor 18 feeds the continuous paper P from the paper hopper 16 and conveys the continuous paper P downstream.

  Two photosensitive drums 20 that rotate in a predetermined direction are provided on the downstream side of the tractor 18 on the upstream side (lower side in FIG. 1) and the downstream side (upper side in FIG. 1).

  Around the two photosensitive drums 20, the charging device 22 for charging the surface of the photosensitive drum 20 in order from the upstream side in the rotation direction of the photosensitive drum 20, and the photosensitive drum 20 are exposed to light and exposed on the photosensitive drum 20. An exposure device 24 for forming a latent image, a developing device 26 for forming a toner image by attaching toner to the latent image formed on the photosensitive drum 20, and a toner formed on the photosensitive drum 20. A transfer device 28 for transferring the image to the continuous paper P at the transfer position and a cleaning device 30 for removing the toner remaining on the photosensitive drum 20 are provided.

  The toner image is transferred from the upstream photosensitive drum 20 to one surface (back surface) of the continuous paper P, and the toner image is transferred from the downstream photosensitive drum 20 to the other surface (front surface) of the continuous paper P. It is configured to be.

  On the downstream side of the photosensitive drum 20, flash fixing devices (fixing devices) 32 for fixing a toner image on the continuous paper P by emitting a flash lamp are provided on the upstream side (lower side in FIG. 1) and the downstream side ( In FIG. 1, two are provided on the upper side.

  The upstream flash fixing device 32 fixes the toner image formed on one surface (back surface) of the continuous paper P, and the downstream flash fixing device 32 is formed on the other surface (front surface) of the continuous paper P. Fix the toner image. Since the flash fixing device 32 can perform fixing in a non-contact state with the continuous paper P, the toner image does not bleed or dust, and the resolution of the toner image fixed on the continuous paper P does not deteriorate. Further, since fixing is performed without contact, fixing is possible regardless of the material and thickness of the continuous paper P such as glued paper, preprinted paper, and paper having different thicknesses.

  On the downstream side of the flash fixing device 32, there is provided a smoke removal intake section 33 that sucks gas evaporated from the toner by flash fixing of the flash fixing device 32 and discharges it to the outside of the device. The smoke removal intake section 33 draws in gas from the intake port by a blower, filters the sucked gas through the smoke removal filter 35, and then discharges the gas outside the apparatus.

  In addition, a stacker (paper storage unit) 34 that stores the continuous paper P on which the toner image has been fixed and printing has been completed is disposed below the apparatus housing 14.

  A swing arm 37 that reciprocally swings in the lateral direction (left-right direction in FIG. 1) is provided on the top of the stacker 34. As the swing arm 37 swings, the continuous paper P is accommodated in the stacker 34 while being folded.

  In the image forming apparatus 12 of the present embodiment, the continuous paper P on which the toner image is fixed and the printing is finished is guided to the stacker (paper storage unit) 34, and the continuous paper P on which the toner image is fixed and the printing is finished. It is possible to switch to a route leading to the coating device 40.

  As shown in FIG. 2, the coating device 40 includes a feed roll 54 that is driven to rotate in a predetermined direction (counterclockwise direction in FIG. 2) at a lower portion thereof. A pinch roll 56 that sandwiches the continuous paper P with the feed roll 54 and conveys the continuous paper P is disposed at a position facing the feed roll 54. Thus, the continuous paper P is transported while maintaining a constant tension between the feed roll 54 and the pinch roll 56 and the tractor 18.

  On the upstream side of the pinch roll 56, support frames 43 </ b> A and 43 </ b> B whose one end facing the continuous paper P to be transported are disposed along the transport path K of the continuous paper P. The support frame 43A is disposed on the upstream side (the upper side in FIG. 2) of the transport path K of the continuous paper P, and the open end of the support frame 43A faces one surface (front surface) of the continuous paper P. is doing. On the other hand, the support frame 43B is disposed on the downstream side (lower side in FIG. 2) of the transport path K of the continuous paper P, and the open end of the support frame 43B faces the other surface (back surface) of the continuous paper P. is doing.

  As shown in FIGS. 2 and 3, solid lubricants 42 each having a rectangular parallelepiped shape are provided in the support frames 43 </ b> A and 43 </ b> B. Further, in each of the support frames 43A and 43B, a rotating brush 50 is rotatably supported as an application unit that scrapes off the lubricant 42 and applies it onto the continuous paper P on which the toner image is fixed.

  Further, the rotating brush 50 protrudes partly from the open ends of the support frames 43A and 43B, and the rotating brush 50 provided on the support frame 43A comes into contact with one surface (front surface) of the continuous paper P. The rotating brush 50 provided on the support frame 43B is in contact with the other surface (back surface) of the continuous paper P.

  At positions facing the rotating brush 50, driven rollers 52 that sandwich the conveyed continuous paper P with the rotating brush 50 are respectively arranged.

  The rotating brush 50 is rotated in contact with the lubricant 42 by a drive unit 58 constituted by a drive motor or the like, scrapes the lubricant 42 into a powder form, and applies the lubricant 42 in powder form to a continuous paper. Apply on P.

The fiber density on the surface of the rotating brush 50 is set in a range of, for example, 10 × 10 ³ to 30 × 10 ³ / inch ² . The fiber length of the surface of the rotating brush 50 is set to 1.0 to 20.0 mm, for example. The thickness of these fibers is set to 200-600 dtex / 15-100.

  Examples of the fibers of the rotating brush 50 include resin fibers such as nylon, acrylic, polypropylene, and polyester. Conductive fibers may be used.

  Further, in the present embodiment, the amount of lubricant 42 applied via the rotating brush 50 is determined by the amount of biting (contact depth) of the rotating brush into the continuous paper, the peripheral speed of the rotating brush, and the circumference of the rotating brush. The speed is adjusted by the ratio of the speed and the continuous paper conveyance speed (the peripheral speed of the rotating brush / the continuous paper conveyance speed). The coating amount on the continuous paper P is, for example, in the range of 0.1 mg to 0.2 mg for a size of 18 × 12 inches, for example.

  In addition, there has conventionally been a coating apparatus that applies a lubricant to the photosensitive drum. However, the photosensitive drum has a small surface friction coefficient (μ), whereas the application target in this embodiment is generally used. Paper (office paper, continuous paper) that is larger than the friction coefficient (μ) of the surface of the photosensitive drum. For this reason, since the adhesion rate of the lubricant is better in the case of the paper, the adjustment of the coating amount in the present embodiment for coating the paper is different from the conventional coating device for coating on the photosensitive drum, as follows. Such adjustments are made.

  The amount of biting into the continuous paper P by the rotating brush 50 is preferably in the range of 1.0 mm to 5.0 mm, but more preferably in the range of 1.5 mm to 4.5 mm in consideration of extending the life. By setting within this range, the lubricant 42 is efficiently applied to the continuous paper P over a long period of time, and an appropriate amount of the lubricant 42 can be applied.

  If the amount of biting is less than 1.0 mm, the contact area between the continuous paper P and the brush is reduced, so that sufficient lubricant 42 cannot be applied to the continuous paper P. If the amount of biting exceeds 5.0 mm, the brush 42 is applied to the back and the lubricant 42 adhering to the vicinity of the tip does not rub against the continuous paper P. Therefore, the lubricant 42 cannot be sufficiently applied to the continuous paper P.

  The peripheral speed of the rotating brush 50 is preferably in the range of 500 mm / sec to 3520 mm / sec, and more preferably in the range of 1000 mm / sec to 2011 mm / sec. By setting within this range, the lubricant 42 is efficiently applied to the continuous paper P over a long period of time, and an appropriate amount of the lubricant 42 can be applied.

  When the above peripheral speed is less than 500 mm / sec, the amount of the lubricant 42 applied to the continuous paper P is reduced. When the above peripheral speed exceeds 3520 mm / sec, the brush of the rotating brush is easy to sag, Lubricant 42 is less likely to adhere to the brush, and the amount of lubricant 42 applied to continuous paper P is reduced.

  The ratio of the peripheral speed of the rotating brush 50 to the conveying speed of the continuous paper P (rotating brush 50 / conveying speed of the continuous paper P) is preferably 0.85 to 6, and preferably 1.71 to 3.42. Is more preferable. By setting within this range, the lubricant 42 is efficiently applied to the continuous paper P over a long period of time, and an appropriate amount of the lubricant 42 can be applied.

  When the above value is less than 0.85, the coating amount of the lubricant 42 on the continuous paper P is reduced. When the above value is over 6, the brush of the rotating brush is easy to sag, and the lubricant is applied to the brush. 42 becomes difficult to adhere, and the application amount of the lubricant 42 to the continuous paper P decreases.

  As shown in FIG. 2, a control unit 60 that controls the drive unit 58 is connected to the drive unit 58, and the control unit 60 controls the drive unit 58 to change the rotation speed of the rotary brush 50. Thus, the amount of the lubricant 42 applied to the continuous paper P is controlled.

  When the transport speed V1 of the continuous paper P and the rotational speed V2 of the rotary brush 50 are set, V2 = αV1, and the coating amount can be controlled by variably controlling the value of α. For example, a plurality of modes having different application amounts may be set in advance, and the mode may be switched to the plurality of modes.

  Immediately after the start of printing, since there is no lubricant component in the conveyance belt, conveyance roller, guide, and the like of the post-processing device 90, there is a high possibility that toner due to contact will be scraped off. In addition, the peripheral speed of the rotating brush 50 is increased to increase the supply amount of the lubricant 42.

  If a lubricant component adheres too much to the conveyance belt, conveyance roller, guide, etc. of the post-processing device 90 after the start of printing, a conveyance failure occurs in the post-processing device 90. The peripheral speed is decreased to reduce the supply amount of the lubricant 42. In this way, by reducing the rotational speed of the rotary brush 50 as the predetermined time elapses, the supply of the lubricant 42 can be controlled, and problems in the post-processing device 90 can be prevented.

  As the lubricant 42 according to this embodiment, metal soap and wax are used, zinc stearate is used as the metal soap, and polyethylene wax is used as the wax. In addition to zinc stearate, metal soap as the lubricant 42 includes barium stearate, lead stearate, iron stearate, nickel stearate, cobalt stearate, copper stearate, strontium stearate, calcium stearate, stearin. Cadmium acid, magnesium stearate, zinc oleate, manganese oleate, iron oleate, cobalt oleate, lead oleate, magnesium oleate, copper oleate, palmitic acid, cobalt zinc palmitate, copper palmitate, magnesium palmitate , Relatively higher fatty acids such as aluminum palmitate, calcium palmitate, lead caprylate, lead caproate, zinc linolenate, cobalt linolenate, calcium linolenate and cadmium corinoneate Suitably used. In addition, for example, colloidal high-temperature silica powder such as Cab-O-S11 commercially available from Kapot Corporation can be used. In addition to polyethylene wax, natural wax such as ester wax, polypropylene or a copolymer of polyethylene and polypropylene, carnauba wax, polyglycerin wax, microcrystalline wax, paraffin wax, carnauba wax, sazol wax, etc. , Montanic acid ester wax, deacidified carnauba wax, palmitic acid, stearic acid, montanic acid, brandic acid, eleostearic acid, valinalic acid and other unsaturated fatty acids, stearic alcohol, aralkyl alcohol, behenyl alcohol, carnauvir alcohol, Saturated alcohols such as seryl alcohol, melyl alcohol, or long-chain alkyl alcohols having a long-chain alkyl group; Alcohols; fatty acid amides such as linoleic acid amide, oleic acid amide, lauric acid amide; saturated fatty acid bisamides such as methylene bisstearic acid amide, ethylene biscapric acid amide, ethylene bislauric acid amide, hexamethylene bisstearic acid amide Unsaturated fatty acid amides such as ethylene bisoleic acid amide, hexamethylene bisoleic acid amide, N, N′-dioleyl adipic acid amide, N, N′-dioleyl sebacic acid amide; Aromatic bisamides such as amides and N, N′-distearylisophthalic acid amides; Waxes grafted to aliphatic hydrocarbon waxes using vinyl monomers such as styrene and acrylic acid; behenic acid monoglycerides, etc. Fatty acids and many Alcohol partial ester; and methyl ester compounds having hydroxyl groups obtained by and hydrogenated vegetable oils and the like. Among these, zinc stearate, calcium stearate, a weight average molecular weight of 3000 or less, and a low molecular weight and high density polyethylene having a density of 0.96 or more are the most effective.

  As shown in FIG. 4, the lubricant 42 is attached to a substantially L-shaped attachment plate 44 fixed to the support frames 43A and 42B. The attachment plate is attached by winding a plurality of thread-like Kevlar fibers 46 around the lubricant 42 along the longitudinal direction of the lubricant 42.

  A leaf spring (biasing member) 48 that biases the lubricant 42 toward the rotary brush 50 is provided between the lubricant 42 and the mounting plate 44. The leaf spring 48 urges the lubricant 42 toward the rotary brush 50, so that the lubricant 42 is pushed out toward the rotary brush 50 as the lubricant 42 is scraped off and consumed by the rotary brush 50. The lubricant 42 is always in contact with the rotating brush 50 even when the amount is reduced.

  Further, the Kevlar fiber 46 wound around the lubricant 42 restricts the movement of the lubricant 42 toward the rotating brush 50, and the amount of biting into the rotating brush 50 by the lubricant 42 is kept constant at a predetermined value. ing. Thus, the Kevlar fiber 46 functions as an attachment member for attaching the lubricant 42 and also as a regulating member that regulates the movement of the lubricant 42 and keeps the amount of biting into the rotating brush 50 constant.

  With this configuration, a constant amount of the lubricant 42 is scraped from the lubricant 42 by the rotating brush 50 at all times, and the stable supply of the lubricant 42 becomes possible.

  Next, the operation of this embodiment will be described.

  In the image forming system according to the present embodiment, the continuous paper P accommodated in the paper hopper 16 is conveyed by the tractor 18 and sent between the photosensitive drum 20 and the transfer device 28.

  On the fed continuous paper P, the toner image formed on the photosensitive drum 20 is transferred by the transfer device 28, and toner images are formed on both sides. Further, the toner image conveyed to the flash fixing device 32 and transferred onto both sides is fixed by the flash fixing device 32. Further, the continuous paper P is conveyed to the coating device 40.

  In the coating device, the rotating brush 50 scrapes off the solid lubricant 42 and applies it to both surfaces of the continuous paper P on which the toner image is fixed.

  As a result, the lubricant 42 applied on the continuous paper P adheres to a contact object (such as a transport belt, a transport roll, or a transport guide of the post-processing device 90) that comes into contact with the continuous paper P, and continues with the contact object. The frictional force generated with the paper P is reduced. For this reason, the scratch resistance of the toner image fixed on the continuous paper P can be improved. Thereby, the conveyance belt and the conveyance roll are hardly stained with toner. Since the conveyance belt and the conveyance roll are not easily contaminated, the contamination of the continuous paper P caused by the toner reattaching to the continuous paper P from the conveyance belt and the conveyance roll can be prevented. In addition, it is possible to prevent contamination due to slip marks or the like caused by the conveyance belt, conveyance roll, or the like of the post-processing device 90 coming into contact with the paper surface.

  The water-soluble lubricant 42 is likely to penetrate into the continuous paper P, so the lubricant 42 may be excessively supplied. However, the solid lubricant 42 is difficult to be excessively supplied and the supply amount is easily adjusted. An appropriate amount of lubricant 42 can be supplied to the continuous paper P.

  Further, since the amount of biting of the rotary brush 50 onto the continuous paper P is set in the range of 1.0 mm to 5.0 mm, the lubricant 42 is efficiently applied to the continuous paper P. Further, if the amount of biting of the rotary brush 50 into the continuous paper P is set in the range of 1.5 mm to 4.5 mm, the life of the rotary brush 50 can be extended.

  Further, since the peripheral speed of the rotary brush 50 is set in the range of 500 mm / sec to 3520 mm / sec, the lubricant 42 is efficiently applied to the continuous paper P. Further, if the peripheral speed of the rotating brush 50 is set in the range of 1000 mm / sec to 2011 mm / sec, the life of the rotating brush 50 can be extended.

  Further, since the ratio of the peripheral speed of the rotating brush 50 and the conveying speed of the continuous paper P (rotating brush 50 / conveying speed of the continuous paper P) is set in the range of 0.85 to 6, the continuous paper P is transferred. The lubricant 42 is efficiently applied. Further, if the ratio between the peripheral speed of the rotating brush 50 and the conveying speed of the continuous paper P (rotating brush 50 / conveying speed of the continuous paper P) is set to 1.71 to 3.42, the long life of the rotating brush 50 is achieved. Can be achieved.

  In the present embodiment, the lubricant 42 is indirectly applied to the continuous paper P via the rotating brush 50. The lubricant 42 can be applied directly to the continuous paper P, but the recording media such as the continuous paper P used in the image forming apparatus 12 are various from narrow to wide and from thin paper to thick paper. Therefore, when the solid lubricant 42 is applied in direct contact with the recording medium to be conveyed, only the lubricant 42 in contact with the recording medium is consumed, and the recording medium is changed from narrow to wide. For example, there is a problem that the recording medium cannot be uniformly applied. Instead of directly applying the lubricant 42 in contact with the continuous paper P as in the present embodiment, by applying the lubricant 42 on the continuous paper P indirectly through the rotating brush 50, It is possible to deal with a wide variety of continuous paper P.

  Further, in the present embodiment, the toner image is fixed without contact with the continuous paper P by the flash fixing device 32. Therefore, the surface of the fixed toner image is not smoothed, and the fixed toner image is scraped and scraped off. In addition, since the scraped toner is reattached to the continuous paper P and easily contaminates the continuous paper P, the effect of improving the scratch resistance of the toner image fixed on the continuous paper P is particularly improved. Get higher.

  In addition, there are a conventional configuration in which a lubricant such as wax is added to the toner to improve the scratch resistance of the toner image, and a conventional configuration in which a lubricant such as wax is applied to the photosensitive drum. Then, since the lubricant is supplied to the paper before the flash fixing, when the smoke removal intake section 33 sucks the lubricant component vaporized by the flash fixing and filters it by the smoke removal filter 35, the filter Since clogging is likely to occur, the running cost becomes high, such as shortening the replacement period and increasing the cost of the toner itself. Some lubricant components volatilize by flash fixing and the effect of scratch resistance does not work. Further, since the component of the lubricant is supplied not inside the toner image but inside the toner image, the toner image is likely to be partially peeled off from the continuous paper, which causes the continuous paper to become dirty. . On the other hand, in the present embodiment, the lubricant 42 is supplied after the flash fixing, so that the above-described problems such as clogging with the smoke removal filter do not occur.

  In the present embodiment, the lubricant 42 is applied onto the continuous paper P with the flexible rotating brush 50, so that the thickness of the continuous paper P and steps such as cards and labels are ignored. Can do.

  In addition, when liquid wax such as silicone oil is used, when applying the liquid component to the paper surface, the oil viscosity becomes a problem because it is uniformly thin and applied stably, and heat is applied to reduce the viscosity. However, with the solid lubricant 42, the above mechanism is not necessary.

  In addition, when liquid wax is used, when an image is formed on continuous paper as in this embodiment, the surface of the paper is separated from the mechanism where liquid wax is applied when the paper is stopped due to printing start / stop. Otherwise, there is a concern that overprinting will be supplied to the printing surface and it will be soiled with oil marks. On the other hand, the solid lubricant 42 does not supply excessively even when the paper is in contact with the application mechanism, and does not require a mechanism for separating and contacting the paper. There is no concern of smearing the paper surface by the mechanism.

  Further, the present embodiment using the solid lubricant 42 is more advantageous than the liquid wax when adjusting the supply amount of the lubricant 42.

  In addition, in the known example shown in the background art (configuration in which a water-soluble lubricant is applied), the smoothness of the paper itself and the wear resistance due to the reduction of the surface tension are improved. Affect and improve dirt. That is, the solid lubricant 42 is once applied to the paper, and the amount applied is, for example, 0.005 g or less per A4 and hardly adheres. For this reason, smoothness and frictional force reduction by the lubricant 42 can hardly be expected. However, the lubricant 42 adheres to the rubber or metal part on the post-processing device side that rubs against the paper, and the frictional force on that side is reduced to prevent the paper from being soiled. Therefore, in this embodiment, it can be said that the effect can be improved with a very small coating amount.

  Further, in the publicly known example shown in the background art (a configuration in which a water-soluble lubricant is applied), it is difficult to dry in the case of coated paper, so it is likely to remain as a stain. It can handle various media.

  Moreover, in the publicly known example shown in the background art (configuration in which a water-soluble lubricant is applied), the water-soluble lubricant 42 penetrates and is uniformly applied to the entire surface. In this embodiment, the scraped powder lubricant 42 is applied, so that it is easy to write with a ballpoint pen or the like.

  In addition, the liquid type of the well-known example shown in the background art (a configuration in which a water-soluble lubricant is applied) can be carried and removed, but the dry type does not leak liquid, so it is easy to carry and remove. It is. In this embodiment, a drying process is not necessary.

〔Example〕
In this embodiment, in the configurations of Examples 1 to 17 and Comparative Examples described below, the contamination of the continuous paper generated after the continuous paper is cut by the cutting device as the post-processing device and the conveying belt of the cutting device. The soiling property was evaluated.

FIG. 6 shows a list of evaluation results of examples and comparative examples according to the present invention as Table 1. FIG. 7 shows the transition of the amount of stain on the continuous paper as Table 2. In FIG. The setting conditions regarding the rotating brush of the coating apparatus are shown. FIG. 9 shows, as Table 4, the transition of the scraping amount of the zinc stearate bar and the transition of the scraping amount per 1 ks (ks is 1,000 sheets) of the zinc stearate bar. FIG. 10 is a graph showing the transition of the amount of scraping of the zinc stearate bar. FIG. 11 shows a graph of the transition of the amount of scraping per 1 ks of the zinc stearate bar. FIG. 12 shows, as Table 5, the adhesion rate at which zinc stearate scraped by the rotating brush actually adheres to continuous paper.
Note that the number of printed sheets in the above table means the number of each page in continuous paper, and the size per page is 18 × 12 inches.

  Contamination of the conveyor belt was visually determined as good for good and bad for poor. The purpose of this determination is to check the degree of contamination of the conveyor belt caused by rubbing the conveyor belt with the toner image on the continuous paper.

  Contamination of the continuous paper was determined by scanning the continuous paper as a printed print sample (ES-10000G manufactured by EPSON) and calculating the average brightness using the Adobe Photoshop tool on the personal computer (specific procedure is Adobe Photoshop on the personal computer). Tools ⇒ Grayscale ⇒ Image ⇒ Histogram ⇒ Average luminance).

  The average brightness was obtained by determining the place rubbed by the conveyor belt in a range of 1.5 mm × 10 mm width, taking the average value of 5 places, and subtracting the brightness value of the place not rubbed. ◎ is particularly good, 0-2, ○ is good, 3-4, △ is slightly good (somehow usable level) 4-6, ▲ is somewhat bad (somehow unusable level) 7-10, x is It was judged as 11 or more because it was bad. The purpose of this determination is to check the degree of contamination of the continuous paper caused by rubbing the conveyor belt with the toner image on the continuous paper.

Example 1
In Example 1, a Fuji Xerox printer as an image forming apparatus having the configuration described in the above embodiment was used. In Example 1, in the coating apparatus having the configuration described in the above embodiment, two zinc stearate bars (compacted by compressing powdered zinc stearate into a rectangular solid) as two lubricants. In addition, a coating apparatus to which a rotating brush having an outer diameter of 48 mm and a brush circumference of 150.8 mm was applied as a rotating brush was used. Further, in the first embodiment, a cutting device that sandwiches continuous paper between a transport belt and a transport roll disposed to face the transport belt, drives the transport belt to transport the continuous paper, and cuts the continuous paper. Used as a post-processing apparatus.

  Furthermore, in Example 1, the amount of biting of the rotating brush into the zinc stearate bar was set to 3 mm, and the amount of biting of the rotating brush into the continuous paper was also set to 3 mm. Also, the conveying speed of the continuous paper contacting the rotating brush is set to 588 mm / sec, the brush peripheral speed of the rotating brush is set to 503 mm / sec, and the ratio (rotating speed) of the rotating brush to the continuous paper conveying speed is set. The peripheral speed of the brush ÷ the conveying speed of the continuous paper) was 0.85.

  In Example 1 set in this way, the results shown in Tables 1 and 2 were obtained. In Example 1, the peripheral speed of the rotating brush is slow, and the peripheral speed ratio between the rotating brush and the continuous paper is less than 0.85 and 1, so that the lubricant is not efficiently supplied to the continuous paper. Although the smearing property on continuous paper has not been improved sufficiently, it is at a level that can be used somehow when the practical standard for the number of printed sheets is 50 to 300 ks.

(Example 2)
In Example 2, the peripheral speed of the rotating brush is set to 1005 mm / sec, and the ratio between the peripheral speed of the rotating brush and the continuous paper conveyance speed (the peripheral speed of the rotating brush ÷ the continuous paper conveyance speed) is 1.71. did. The other setting conditions were the same as in Example 1.

  In Example 2 set as above, the results shown in Tables 1 and 2 were obtained. In the second embodiment, the peripheral speed of the rotating brush is faster than that of the first embodiment, and the peripheral speed ratio of the rotating brush and the continuous paper is 1.71, which is approximately twice, so that the lubricant is supplied to the continuous paper. Is efficiently performed, so that the soiling on continuous paper can be improved.

(Example 3)
In Example 3, the peripheral speed of the rotary brush is set to 1508 mm / sec, and the ratio of the peripheral speed of the rotary brush to the continuous paper transport speed (the peripheral speed of the rotary brush ÷ the continuous paper transport speed) is 2.56. did. The other setting conditions were the same as in Example 1.

Example 4
In Example 4, the peripheral speed of the rotating brush is set to 2011 mm / sec, and the ratio between the peripheral speed of the rotating brush and the continuous paper conveyance speed (the peripheral speed of the rotating brush ÷ the continuous paper conveyance speed) is 3.42. did. The other setting conditions were the same as in Example 1.

(Example 5)
In Example 5, the peripheral speed of the rotary brush was set to 2513 mm / sec, and the ratio of the peripheral speed of the rotary brush to the continuous paper transport speed (the peripheral speed of the rotary brush ÷ the continuous paper transport speed) was 4.28. did. The other setting conditions were the same as in Example 1.

  In Examples 3 to 5 set as described above, results as shown in Tables 1 and 2 were obtained. In Examples 3 to 5, since the balance between the peripheral speed of the rotating brush and the peripheral speed ratio between the rotating brush and the continuous paper is good, there is little brush settling or the like caused by the high peripheral speed of the rotating brush. Lubricant is efficiently supplied to the paper, and the soiling property to the continuous paper can be sufficiently improved. Moreover, in Examples 3-5, since there is little brush stickiness etc. which arise when the peripheral speed of a rotating brush is quick, lifetime improvement of a rotating brush can be achieved.

(Example 6)
In Example 6, the peripheral speed of the rotary brush was set to 3519 mm / sec, and the ratio of the peripheral speed of the rotary brush to the continuous paper transport speed (the peripheral speed of the rotary brush ÷ the continuous paper transport speed) was 5.98. did. The other setting conditions were the same as in Example 1.

  In Example 6 set as described above, the results shown in Tables 1 and 2 were obtained. In Example 6, when the rotation speed exceeds 300 ks, the peripheral speed of the rotating brush becomes too fast, so that the brush is set and the solid lubricant cannot be efficiently scraped off, so that the lubricant is difficult to adhere to the brush. Therefore, it is considered that the lubricant is not efficiently supplied to the continuous paper. In addition, although there is an improvement in the smearing property on the continuous paper, the life of the brush comes first due to the consumption of the fixed lubricant. As in the first embodiment, the practical standard for the number of printed sheets is 50 to 300 ks. If you do, it is at a level where there is no problem.

  As the evaluation results of Examples 1 to 6 show, the peripheral speed of the rotating brush is preferably in the range of 503 mm / sec to 3519 mm / sec. When considering the long life of the rotating brush, 1000 mm / sec to 2011 mm / sec. The range of is more preferable. Similarly, the peripheral speed ratio between the rotating brush and the continuous paper is preferably in the range of 0.85 to 5.98, but in consideration of extending the life of the rotating brush, the range of 1.71 to 3.42 is more preferable. .

(Comparative Example 1)
In Comparative Example 1, the coating apparatus is omitted, and a lubricant such as zinc stearate is not applied. The setting conditions of the image forming apparatus and the post-processing apparatus were the same as those in Example 1.

(Example 7)
In Example 7, the amount of the rotary brush biting into the continuous paper was set to 1.0 mm. The other setting conditions were the same as in Example 3.

  In Example 7 set as described above, the results shown in Table 1 were obtained. In Example 7, since the contact area between the continuous paper and the brush is reduced due to the small biting amount (contact depth) of the rotating brush into the continuous paper, there is a surface where sufficient lubricant cannot be supplied to the continuous paper. When the practical standard is 50 to 300 ks, the level is not particularly problematic.

(Example 8)
In Example 8, the amount of the rotary brush biting into the continuous paper was set to 1.5 mm. The other setting conditions were the same as in Example 3.

Example 9
In Example 9, the amount of the rotary brush biting into the continuous paper was set to 3.0 mm. The other setting conditions were the same as in Example 3.

(Example 10)
In Example 10, the amount of the rotary brush biting into the continuous paper was set to 4.5 mm. The other setting conditions were the same as in Example 3.

  In Examples 8 to 10 set as described above, the results shown in Table 1 were obtained. In Examples 8 to 10, the amount of biting of the rotating brush into the continuous paper is good, so that a sufficient lubricant can be supplied to the continuous paper.

(Example 11)
In Example 11, the amount of the rotary brush biting into the continuous paper was set to 5.0 mm. The other setting conditions were the same as in Example 3.

  In Example 11 set as described above, the results shown in Table 1 were obtained. In Example 11, since the amount of biting of the rotating brush into the continuous paper is large, the lubricant is attached to the tip of the brush and does not rub against the continuous paper, so that sufficient lubricant cannot be supplied to the continuous paper. However, when the practical standard is 50 to 300 ks, the level is not particularly problematic. Moreover, since the brush of a rotating brush serves as a belly pad, the lifetime of a brush is shortened.

  As the evaluation results of Examples 7 to 11 show, the amount of biting of the rotating brush into the continuous paper is preferably in the range of 1 mm to 5 mm, but in consideration of extending the life, the range of 1.5 mm to 4.5 mm. Is more preferable.

(Example 12)
In Example 12, two zinc stearate bars were changed to polyethylene wax bars as two lubricants under the setting conditions of Example 1, respectively. The other setting conditions were the same as in Example 1.

  In Example 12 set as described above, the results shown in Tables 1 and 2 were obtained. In Example 12 and Examples 13 to 17 shown below, the results were evaluated up to the number of printed sheets of 50 ks.

  In Example 12 set as described above, the results shown in Tables 1 and 2 were obtained. In Example 12, the peripheral speed of the rotating brush is slow, and the peripheral speed ratio between the rotating brush and continuous paper is less than 0.85 and 1, so that the lubricant is not efficiently supplied to the continuous paper. Although the smearing property on continuous paper has not been improved sufficiently, as in Example 1, it can be used if the standard for the number of printed sheets is lowered.

(Example 13)
In Example 13, the two zinc stearate bars were changed to polyethylene wax bars as the two lubricants under the setting conditions of Example 2, respectively. The other setting conditions were the same as in Example 2. In Example 13 set as described above, the results shown in Tables 1 and 2 were obtained.

  In Example 13 set as described above, the results shown in Tables 1 and 2 were obtained. In Example 13, the peripheral speed of the rotating brush is faster than that of Example 12, and the peripheral speed ratio between the rotating brush and the continuous paper is 1.71, which is approximately twice, so that the lubricant is supplied to the continuous paper. Is efficiently performed, so that the soiling on continuous paper can be improved.

(Example 14)
In Example 14, two zinc stearate bars as two lubricants were changed to polyethylene wax bars under the setting conditions of Example 3, respectively. The other setting conditions were the same as in Example 3. In Example 14 set as described above, the results shown in Tables 1 and 2 were obtained.

(Example 15)
In Example 15, two zinc stearate bars as two lubricants were changed to polyethylene wax bars under the setting conditions of Example 4, respectively. The other setting conditions were the same as in Example 4. In Example 15 set as described above, the results shown in Tables 1 and 2 were obtained.

(Example 16)
In Example 12, two zinc stearate bars as two lubricants were changed to polyethylene wax bars under the setting conditions of Example 5, respectively. The other setting conditions were the same as in Example 5. In Example 16 set as above, the results shown in Tables 1 and 2 were obtained.

  In Examples 14 to 16 set as described above, the results shown in Tables 1 and 2 were obtained. In Examples 14 to 16, since the balance between the peripheral speed of the rotating brush and the peripheral speed ratio between the rotating brush and the continuous paper is good, there is little brush settling or the like caused by the high peripheral speed of the rotating brush, and the continuous paper Lubricant is efficiently supplied to the paper, and the soiling property to the continuous paper can be sufficiently improved. Moreover, in Examples 14-16, since there is little brush settling etc. which arise when the peripheral speed of a rotating brush is high, the lifetime of a rotating brush can be extended.

(Example 17)
In Example 17, two zinc stearate bars as two lubricants were changed to polyethylene wax bars under the setting conditions of Example 6, respectively. The other setting conditions were the same as in Example 6. In Example 17 set as above, the results shown in Tables 1 and 2 were obtained.

  In Example 17 set as above, the results shown in Tables 1 and 2 were obtained. In Example 17, since the peripheral speed of the rotating brush is high, the brush is set and the solid lubricant cannot be efficiently scraped off, so that the lubricant is difficult to adhere to the brush. It is considered that the lubricant is not supplied efficiently. In addition, although there is an improvement in the smearing property on continuous paper, the life of the brush comes first due to the consumption of the fixed lubricant, but as in Example 12, it can be used if the standard for the number of printed sheets is lowered. The level.

  As the evaluation results of Examples 12 to 17 show, the peripheral speed of the rotating brush is preferably in the range of 503 mm / sec to 3519 mm / sec. When considering the extension of the life of the rotating brush, 1000 mm / sec to 2011 mm / sec. The range of is more preferable. Similarly, the peripheral speed ratio between the rotating brush and the continuous paper is preferably in the range of 0.85 to 5.98, but in consideration of extending the life of the rotating brush, the range of 1.71 to 3.42 is more preferable. .

  Next, in Examples 1 to 6 above, the amount of scraping of the zinc stearate bar scraped by the rotating brush was measured.

  As the amount of scraping of the zinc stearate bar increases, the amount of zinc stearate adhering to the rotating brush increases. As a result, the amount of zinc stearate to be applied to continuous paper increases, so that it is desirable to stably scrape even when the number of printed sheets is repeated in order to ensure a stable amount of application.

  From the graph shown in FIG. 10, since the zinc stearate bar is stably scraped at a brush peripheral speed of 1005 to 2011 mm / sec, it is particularly preferable that the brush peripheral speed be in the range of 1005 to 2011 mm / sec. Recognize.

  Further, it is preferable that the scraping amount per 1 ks (1000 pages) is stably maintained at a high level. From the graph shown in FIG. 11, the brush rotation speed is preferably 1005 to 2011 mm / sec as in FIG. 10. I understand.

  Next, in Examples 1 to 6 described above, the amount of zinc stearate scraped by the rotating brush actually adhered to the continuous paper was measured. Here, after a continuous paper of 5 ks (for 5000 pages) was passed through the coating apparatus, the adhesion amount per size of 18 × 12 inches was measured. The coating amount is measured by pasting a sample paper weighed in advance on the continuous paper before passing through the coating device, passing through the coating device, peeling off the sample paper, measuring the weight, Subtraction after passing was measured. For the measurement, Shimadzu Corporation (LIBROR AEL-200 unit: 0.0001 g) was used.

  As shown in Table 5 of FIG. 12, for example, at a brush peripheral speed of 1508 mm / sec, the amount of lubricant scraped is 0.146 mg per sheet. On the other hand, since the adhesion amount of the lubricant per sheet is 0.1 mg, the adhesion rate to the sheet is 0.1 mg / 0.146 mg, which is about 70%.

  Similarly, at a peripheral speed of 3519 mm / sec, the adhesion rate is about 90% at 0.2 mg / 0.220 mg.

  In Table 5 in FIG. 12, the amount of adhesion per sheet at the brush peripheral speeds of 2011 mm / sec and 2513 mm / sec is 0.2 mg because the unit of the measuring instrument is 0.0001 g. Since the adhesion rate to the sheet cannot exceed 100%, (100%) is displayed.

  In the above embodiment, continuous paper is used as the recording medium. However, the recording medium to which the lubricant is applied is not limited to this, and any recording medium on which a toner image is formed may be used. The size, thickness, material, etc. of the medium are not questioned.

  In the present embodiment, the coating apparatus 40 is provided separately from the image forming apparatus 12. However, the coating apparatus 40 may be provided in the image forming apparatus 12, for example, the flash fixing device 32 and the stacker. Between 34, a coating device 40 can be provided.

  In the present embodiment, the toner image is formed and fixed on both sides of the continuous paper P, and the lubricant is applied to both sides of the continuous paper P. However, the toner image is formed and fixed on one side of the continuous paper P. The structure which apply | coats a lubricant to the single side | surface may be sufficient.

  In this embodiment, a rotating brush is used as the application means. However, the application means of the present invention is not limited to this, for example, a roll provided with a sponge formed of urethane or the like, or a surface that is sandblasted. A metal roll may also be used.

  The present invention is not limited to this embodiment and examples, and various modifications, changes, and improvements can be made without departing from the gist of the present invention.

FIG. 1 is a diagram showing an image forming system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a coating apparatus according to the present embodiment. FIG. 3 is a view showing a rotating brush of the coating apparatus according to the present embodiment. FIG. 4 is a diagram illustrating the lubricant of the coating apparatus according to the present embodiment. FIG. 5 is a diagram illustrating a case where the lubricant in the coating apparatus according to the present embodiment has decreased. FIG. 6 is a diagram showing a list of evaluation results of examples and comparative examples according to the present invention. FIG. 7 is a diagram showing the transition of the amount of stain on the continuous paper in this embodiment. FIG. 8 is a diagram illustrating setting conditions related to the rotating brush of the coating apparatus according to the present embodiment. FIG. 9 is a diagram showing the transition of the scraping amount of the zinc stearate bar and the transition of the scraping amount per 1 ks of the zinc stearate bar in this example. FIG. 10 is a graph showing the transition of the scraping amount of the zinc stearate bar in this example. FIG. 11 is a graph showing the transition of the amount of scraping per 1 ks of the zinc stearate bar in this example. FIG. 12 is a diagram showing an adhesion rate at which zinc stearate scraped by a rotating brush actually adheres to continuous paper in this example.

Explanation of symbols

10 Image forming system 42 Lubricant 50 Rotating brush (coating means)
60 Control unit

Claims (4)

A solid first lubricant;
A first rotating brush that rotates to scrape off the first lubricant and applies the scraped first lubricant to one surface of a recording medium on which a toner image is fixed;
A first driven roller disposed opposite to the first rotating brush and sandwiching the recording medium with the first rotating brush;
A solid second lubricant;
A second rotating brush that rotates to scrape off the second lubricant and applies the scraped second lubricant to the other surface of the recording medium on which the toner image is fixed;
A second driven roller disposed opposite to the second rotary brush and sandwiching the recording medium with the second rotary brush;
A housing that houses the first lubricant, the first rotating brush, the first driven roller, the second lubricant, the second rotating brush, and the second driven roller;
With
A first clamping position where the recording medium is clamped by the first rotating brush and the first driven roller, and a second clamping position where the recording medium is clamped by the second rotating brush and the second driven roller. , Offset vertically and horizontally,
The recording medium passes through the first clamping position and the second clamping position obliquely with respect to the vertical direction;
The peripheral speed of the first rotating brush and the peripheral speed of the second rotating brush decrease after a predetermined time has elapsed from the start of printing, so that the first lubricant and the second lubricant are applied and friction occurs at the transport unit. An application apparatus that reduces the application amount of the first lubricant and the application amount of the second lubricant applied to the recording medium being conveyed.   A solid first lubricant;
  A first rotating brush that rotates to scrape off the first lubricant and applies the scraped first lubricant to one surface of a recording medium on which a toner image is fixed;
  A first driven roller disposed opposite to the first rotating brush and sandwiching the recording medium with the first rotating brush;
  A solid second lubricant;
  A second rotating brush that rotates to scrape off the second lubricant and applies the scraped second lubricant to the other surface of the recording medium on which the toner image is fixed;
  A second driven roller disposed opposite to the second rotary brush and sandwiching the recording medium with the second rotary brush;
  A housing that houses the first lubricant, the first rotating brush, the first driven roller, the second lubricant, the second rotating brush, and the second driven roller;
  With
  A first clamping position where the recording medium is clamped by the first rotating brush and the first driven roller, and a second clamping position where the recording medium is clamped by the second rotating brush and the second driven roller. , Offset vertically and horizontally,
  The coating apparatus, wherein the recording medium passes through the first clamping position and the second clamping position obliquely with respect to the vertical direction.   The first rotating brush has an application amount of 0.005 g or less per A4 size with respect to the recording medium frictionally conveyed by the conveyance unit after the first lubricant and the second lubricant are applied. 3. The application according to claim 2, wherein a lubricant is applied, and the second rotating brush applies the second lubricant in an amount of 0.005 g or less per A4 size to the recording medium. apparatus.   In an image forming system in which an image is formed on a continuous paper and post-processing is performed on the continuous paper on which the image is formed, an image is formed using an electrophotographic recording method, and the continuous paper after the image formation is formed on the continuous paper. 3. An image forming system, wherein the lubricant is applied by any one of the application apparatuses 3 and post-processing is performed on the applied continuous paper.

Images