JPH09136452A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to selectively form either of a full color image or a monochromatic image on a recording paper and efficiently prepare a document consisting of the full color image and the monochromatic image in a mixed presence state. SOLUTION: When forming a full color image on a recording paper P, a single piece of recording paper P transported into a second printer part 20 by a pair of transport rollers is fed into a guide plate 24 at a constant speed by a pair of transport rollers 22 on a paper feed side. Consequently, an ink image consisting of color components, other than black, as those of the full color image is formed by an ink jet head 21. The recording paper P discharged from the second printer part 20 by a pair of rollers 23 on a paper discharge side is transported into a first printer part 10 by a transport path selected by a claw 4 for switching a transport path. A toner image formed on a photosensor drum 11 is transferred to the recording paper P, and then is thermally pressed by a fixing device 19 to fix the toner image. Thus a toner image of a black component is superimposed on the recording paper P on which an ink image of color components other than black is formed to complete the full color image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a printer, a facsimile machine or a copying machine, which can form a full-color image or a monochrome image on a recording paper.

[0002]

2. Description of the Related Art In recent years, many image forming apparatuses such as printers, facsimile machines and copying machines for forming images on recording paper by a well-known electrophotographic method have been widely used in offices and the like.
Most of such electrophotographic image forming apparatuses have only a function of forming a monochrome image, and few have a function of forming a full-color image. This is because when a full color image is to be formed by an electrophotographic image forming apparatus, the structure of the apparatus becomes complicated and the number of parts increases, so that the apparatus price becomes very high, and This is because the device becomes larger.

On the other hand, as a low-priced and small-sized image forming apparatus having a function of forming a full-color image, there is one which forms an image on a recording sheet by a known ink jet method or bubble jet method. However, an inkjet type or bubble jet type image forming apparatus generally has a printing speed considerably slower than that of an electrophotographic type image forming apparatus.
Further, when forming a full-color image, unless special recording paper such as coated paper is used, high printing quality cannot be obtained due to ink bleeding or the like.

[0004]

As described above, the electrophotographic image forming apparatus capable of forming a full color image becomes expensive and large, and the ink jet type or bubble jet type image forming apparatus has a printing speed and image quality. There is a problem with. From this, in an office or the like in which both full-color images and monochrome images are required for business, for example, an electrophotographic image forming apparatus and an inkjet or bubble jet image forming apparatus are installed side by side, and the user An electrophotographic image forming apparatus is used to form a monochrome image, and an inkjet type or bubble jet type image forming apparatus is used to form a full-color image.

However, when a document or the like in which a full-color image and a monochrome image are mixed is created by the image forming apparatus, a full-color image document and a monochrome image document are created by different image forming apparatuses, or Alternatively, all documents are created by an inkjet or bubble jet image forming apparatus having a slow printing speed. For this reason, it is necessary to perform operations such as editing two types of documents respectively created by two image forming apparatuses into one, or even if the number of documents to be created with full-color images is very small. There is a problem that it takes a long time.

The present invention is capable of forming either a full-color image or a monochrome image on a recording paper, and is capable of efficiently producing a document or the like in which the full-color image and the monochrome image are mixed. An object is to provide a small-sized image forming apparatus.

[0007]

In order to solve the above problems, an image forming apparatus according to a first aspect of the present invention includes a first printer section for forming a monochrome image on a recording sheet by an electrophotographic method, an ink jet method or A second printer unit that forms an image by adhering ink to the recording paper by the bubble jet method, and one recording paper is used in the order of the first printer unit and the second printer unit, or one of them. When a full-color image is formed on the recording sheet and a conveying unit that conveys the recording sheet so as to pass only through the printer section, the recording sheet passes through both the first printer section and the second printer section in order. The recording paper is conveyed by the conveying means to the recording paper conveyed by the conveying means, and
A control unit for forming an image corresponding to a black component in a full-color image by the printer unit, and forming an image corresponding to a non-black component in the full-color image by sequentially adhering a plurality of colors of ink by the second printer unit. It is characterized by having.

Further, the image forming apparatus according to a second aspect of the present invention comprises a separation sheet feeding means for separating one recording sheet from a bundle of recording sheets stored in the recording sheet storage section and feeding it to the conveying means. The recording paper storage unit provided in the main body of the apparatus is single.

Further, in the image forming apparatus according to the third aspect of the invention, there is provided a separation sheet feeding means for separating one recording sheet from the bundle of recording sheets stored in the recording sheet storage section and feeding it to the conveying means. The control unit selects a predetermined recording paper storage unit from a plurality of recording paper storage units provided in the apparatus main body according to whether the recording image is a monochrome image or a color image, and the selected one is selected. It is characterized in that the recording paper is separated and fed from the recording paper storage section by the separating and feeding means.

Further, an image forming apparatus according to a fourth aspect of the present invention is provided with a recording paper discharging section on which the recording paper discharged by the conveying means after the completion of image formation is placed, and is provided in the main body of the apparatus. The recording paper discharge unit is single.

Further, the image forming apparatus according to a fifth aspect of the invention is provided with a recording paper discharge section on which the recording paper discharged by the conveying means after the image formation is completed is placed, and the control section records the recording. Depending on whether the image is a monochrome image or a color image, a predetermined recording paper ejection unit is selected from the plurality of recording paper ejection units provided in the main body of the apparatus, and a selected recording paper ejection unit is selected. The recording sheet is discharged by the conveying means.

Further, in the image forming apparatus according to the sixth aspect, only the ink image is formed by the fixing unit provided in the first printer unit for heating the recording paper and the second printer unit as an image. And a conveying unit that conveys the recording paper so that the recording paper passes through at least the fixing unit in the first printer unit.

Further, in the image forming apparatus according to the present invention, a fixing means for fixing the toner image by heating the recording paper provided in the first printer section on which the unfixed toner image is formed, and an image. As a second aspect, there is provided a conveying unit that conveys the recording paper so that the recording paper on which only the ink image is formed by the second printer unit passes under a high temperature atmosphere near the fixing unit.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a main part of an image forming apparatus according to a first embodiment of the present invention. Reference numeral 1 denotes a paper feed cassette detachably attached to the apparatus main body, and only one paper feed cassette 1 as a recording paper storage unit can be attached to the apparatus main body. Reference numeral 2 is a paper feed roller that is loaded into the paper feed cassette 1 and is pressed against the recording paper P that is urged upward.
Is a pair of conveying rollers, 4 is a conveying path switching claw, 5 is a pair of discharging rollers, 6 is a discharging tray, and only one discharging tray 6 which is a recording sheet discharging section is provided in the apparatus main body. . Reference numeral 10 denotes a first printer unit that forms a monochrome image on the recording paper P by an electrophotographic method. In the first printer unit 10, 11 is a photosensitive drum, 12 is a charger, 13 is an optical writing unit, and 14
Is a developing device, 15 is a transfer roller, 16 is a cleaning device, 17 is a discharging lamp, 18 is a pair of registration rollers, and 19 is a fixing device. A second printer unit 20 forms an image on the recording paper P by an inkjet method.
In the figure, reference numeral 21 denotes an inkjet head, which is provided with three sets of ink nozzles (not shown) that eject yellow, cyan, and magenta inks respectively to form minute dots of each color ink on the recording paper P. 22 is a pair of feed side rollers,
Reference numeral 23 is a paper discharge side roller pair, and 24 is a guide plate.

Next, the operation of the above-mentioned image forming apparatus will be described. The image forming apparatus of the first embodiment is configured so that the printer units 10 and 20 that execute image formation are selected according to the type of image formed on the recording paper P. Specifically, the control unit (not shown) controls the first printer unit 10 and the second printer unit 10 to form a full-color image.
When the printer unit 20 executes image formation, when the monochrome image is formed, the image formation is executed only by the first printer unit 10, and when the color image not including black is formed, the second printer unit 20 is formed. The image formation is executed only by

First, the operation of forming a full-color image on the recording paper P will be described. With respect to the recording paper P loaded in the paper feed cassette 1, only the uppermost one of the recording paper P is separated by the rotation of the paper feed roller 2 in the direction of the arrow, and the conveying roller pair 3
Paper. Although only one pair of conveying rollers 3 is shown in FIG. 1, such conveying roller pairs 3 are arranged at regular intervals along the conveying path of the recording paper P indicated by the one-dot chain line, and the conveying path is switched. The pawl 4 and a guide plate (not shown) constitute a conveying means.

One sheet of recording paper P which has been conveyed into the second printer section 20 by the conveying roller pair 3 has a sheet feeding side conveying roller pair 22.
Is fed at a constant speed into the guide plate 24 and the leading edge is detected by a recording paper sensor (not shown). The inkjet head 21 ejects the ink and attaches the ink to the recording paper P at a timing in response to a signal from the recording paper sensor, so that the image of the other color components except the black component in the full-color image is formed on the recording paper P. To form.

The second printer section 20 is constituted by the pair of rollers 23 on the paper discharge side.
The recording paper P ejected from is conveyed to the inside of the first printer unit 10 with its conveyance path being selected by the conveyance path switching claw 4 having a solid line position. The recording paper P is temporarily stopped at a position where it comes into contact with the holding portion of the registration roller pair 18. On the other hand, in the first printer unit 10, a toner image corresponding to a black component in a full-color image is formed, and at the time of forming this toner image, the photosensitive drum 11 rotating in the arrow direction is a charger.
12 is uniformly charged by the optical writing unit 13, the photosensitive drum 11 that is uniformly charged is scanned by the laser beam L to form an electrostatic latent image on the photosensitive drum 11, and the developing device 14 is By transferring and adhering toner to the photoconductor drum 11, the electrostatic latent image formed on the photoconductor drum 11 is developed into a toner image. The registration roller pair 18 starts conveying the recording paper P at the timing when the toner image on the photosensitive drum 11 reaches a predetermined position, and the transfer roller 15
The toner image on the photosensitive drum 11 is transferred onto the recording paper P which has been conveyed by the registration roller pair 18. This recording paper P
Is conveyed to a fixing device 19 in which a heat source is arranged and heated and pressed to fix the toner image. As a result, the toner image of the black component is superimposed on the recording paper P on which the ink image of the color component excluding the black component is formed, and the full-color image is completed.

After that, the recording paper P is discharged onto the paper discharge tray 6 by the paper discharge roller pair 5. Further, the toner remaining on the photoconductor drum 11 after the transfer of the toner image is completed is removed from the photoconductor drum 11 by the cleaning device 16 and collected in the cleaning device 16. The photoconductor drum 11 from which the residual toner has been removed is neutralized in electric charge by being irradiated with the static elimination light from the static elimination lamp 17.

The operation for forming a full-color image on the recording paper P has been described above. However, for forming a monochrome image on the recording paper P, the recording paper P separated and fed from the paper feed cassette 1 is The image is conveyed through the same conveyance path as in the case of forming a full-color image, but it passes through the second printer section 20 without an ink image being formed, and is conveyed to the first printer section 10 to form a monochrome image. To be done. Here, in the second printer unit 20, when an ink image is formed, the conveyance speed of the recording paper P is limited to a low speed corresponding to the image forming speed of the inkjet head 21, but when the ink image is not formed. The rotation speeds of the roller pairs 22 and 23 are set so that the recording paper P is conveyed at a higher speed than when the ink image is formed.

Further, when a color image containing no black component is formed on the recording paper P, the recording paper P separated and fed from the paper feed cassette 1 is conveyed into the second printer section 20 and the ink jet head. The image of the color components other than the black component is formed on the recording paper P by 21. The recording paper P ejected from the second printer unit 20 by the paper ejection side roller pair 23 has a conveyance path selected by the conveyance path switching claw 4 at the position of the chain double-dashed line, and the transfer position by the registration roller pair 18 and the transfer roller 15. It is conveyed to the fixing device 19 without passing through. The recording paper P is heated by the fixing device 19 and then discharged onto the paper discharge tray 6. Since the fixing device 19 heats the recording paper P to accelerate the drying of the ink adhered to the recording paper P, the drying speed of the color ink adhered to the recording paper P by the inkjet head 21 is slow. Even when the recording paper P is used, the ink image formed on the recording paper P can be surely dried, and even if the user touches the recording paper P immediately after being discharged to the paper discharge tray 6, the ink bleeds and the It is possible to prevent the color ink from adhering.

As described above, according to the image forming apparatus of the first embodiment of the present invention, when forming a full-color image, the second printer section 20 forms an image corresponding to the non-black component in the full-color image. To form an ink image by sequentially depositing a plurality of colors of ink, superimposing a toner image corresponding to the black component in the full color image formed by the first printer unit 10 on this ink image to form a full color, Since the bleeding of the black component in the full-color image is prevented, the image quality can be improved as compared with the full-color image formed by the conventional inkjet or bubble-jet image forming apparatus. Further, when forming a monochrome image, an image is formed on the recording paper P by the same process as that of the conventional electrophotographic image forming apparatus, so that the image forming speed for the recording paper P can be increased. . Further, compared to a case where a conventional electrophotographic image forming apparatus and an inkjet or bubble jet image forming apparatus are purchased and installed in an office or the like, a paper feed cassette 1, a paper ejection tray 6 and a recording paper. The transfer mechanism of P is standardized, and the second
Since the ink jet head 21 of the printer unit 20 does not need an ink nozzle for ejecting black ink, it is possible to suppress the total cost and save the installation space of the device.

FIG. 2 is a block diagram showing a main part of an image forming apparatus according to a second embodiment of the present invention. Members corresponding to the members described with reference to FIG.
The description is omitted. Reference numeral 31 is a fixing device, and a case has a heat exhaust duct 31a for discharging heat generated from a heat source inside the case to the outside of the case. Further, a plurality of (two in the figure) paper feed cassettes 1 are detachably attached to the apparatus main body, and a paper feed roller 2 and a conveyance roller 2 are respectively attached to attachment portions of the plurality of paper feed cassettes 1 in the apparatus main body. Pair 3 is connected. Here, the conveying roller pair 3 is the recording paper P indicated by the one-dot chain line as in the case of the first embodiment.
Are arranged at regular intervals along the conveyance path of (1), and constitute the conveyance means together with the conveyance path switching claw 4, the paper discharge switching claws 7, 8 and a guide plate (not shown). Further, a plurality of (three in the figure) paper ejection trays 6 are provided in the apparatus body, and paper ejection roller pairs 5 are provided in the apparatus body in the vicinity of respective paper ejection ports for the paper ejection trays 6. .

Next, the operation of the image forming apparatus of the second embodiment will be described. In the image forming apparatus of the second embodiment, as in the image forming apparatus of the first embodiment, the printer units 10 and 20 that perform image formation are selected according to the type of image formed on the recording paper P. Is configured. Specifically, the control unit (not shown) causes the first printer unit 10 and the second printer unit 20 to perform image formation when forming a full-color image, and the first printer unit 10 when forming a monochrome image. Image formation is executed only by the printer section 10, and when a color image not containing a black component is formed, image formation is executed only by the second printer section 20.

In the image forming apparatus of the second embodiment,
The operations for forming a full-color image and for forming a monochrome image on the recording paper P are the same as the operations in the first embodiment, so description thereof will be omitted. Further, when a color image containing no black component is formed on the recording paper P, the recording paper P separated and fed from the paper feeding cassette 1 is
The inkjet head is conveyed into the second printer unit 20.
By 21, the ink images of the other color components except the black component are formed on the recording paper P. The recording paper P ejected from the second printer unit 20 by the paper ejection side roller pair 23 is conveyed by selecting the conveyance path below the first printer unit 10 by the conveyance path switching claw 4 at the position shown in the figure. This recording paper P is fixed in the fixing device during transportation.
The image surface of the recording paper P is heated by the radiant heat from the exhaust heat duct 31a and the high-temperature airflow. This can accelerate the drying of the ink adhering to the recording paper P, so that the inkjet head
Even when the color ink adhering to the recording paper P has a low drying speed by 21, the ink image formed on the recording paper P can be surely dried, and the user ejects the ink image to the paper ejection tray 6. Even if the recording paper P immediately after touching is touched, it is possible to prevent ink bleeding and color ink from adhering to the user.

In the image forming apparatus of the second embodiment, the control unit (not shown) selects one paper feed cassette 1 in accordance with the type of image to be formed on the recording paper P,
The apparatus is controlled so that the recording paper P is separated and fed from the selected paper feed cassette 1. For example, it is assumed that plain paper is loaded in the upper paper feed cassette 1 and dedicated paper for inkjet printing such as coated paper is loaded in the lower paper feed cassette 1. In such a case, when forming a monochrome image on the recording paper P, the control unit drives only the upper paper feed roller 2 so that the recording paper P is separated and fed from the upper paper feed cassette 1. Further, when forming a full-color image or a color image containing no black component on the recording paper P, only the lower paper feed roller 2 is driven so that the recording paper P is separated and fed from the lower paper feed cassette 1. As a result, when the image is formed on the recording paper P by the second printer unit 20, the image is formed on the exclusive paper for inkjet printing, so that bleeding and the like can be prevented and high image quality can be obtained. When an image is formed on the recording paper P by only the one printer unit 10, the plain paper is selected and fed, so that it is possible to prevent waste of the dedicated paper for inkjet printing. In the second embodiment, the case where the number of the sheet feeding cassettes 1 is two has been described for simplification of description, but it goes without saying that more than two sheet feeding cassettes 1 can be attached to the apparatus main body. It is possible, and in the image forming apparatus configured as described above,
The paper feed cassette 1 may be selected according to the type of image formed on the recording paper P and the size of the recording paper P on which the image is formed.

Further, the control unit selects one paper discharge tray 6 corresponding to the type of image formed on the recording paper P, and the recording paper P on which the image is formed is discharged to the selected paper discharge tray 6. The conveyance means is controlled so that the paper is printed. For example, when a monochrome image is formed on the recording paper P, the control unit controls the positions of the discharge switching claws 7 and 8 so that the recording paper P is discharged to the upper discharge tray 6. When a full-color image is formed on the recording paper P, the positions of the paper discharge switching claws 7 and 8 are controlled so that the recording paper P is discharged to the middle discharge tray 6, and When a color image containing no black component is formed on P, the lower sheet ejection tray 6
The position of the paper discharge switching claw 7 is controlled so that the recording paper P is discharged. Accordingly, when it is necessary to sort the recording paper P according to the type of the image formed on the recording paper P,
The work of sorting the recording paper P can be made unnecessary, and the labor of the user can be significantly reduced.

In the image forming apparatuses of the first and second embodiments described above, the second printer section 20 has been described as forming an image on the recording paper P by the ink jet method. Which forms an image on the recording paper P by the bubble jet method, that is, which has a bubble jet head, has the same effect as the image forming apparatus of the first or second embodiment. It is clear that it can be obtained. Further, although the second printer unit 20 is arranged on the upstream side and the first printer unit 10 is arranged on the downstream side in the conveyance path of the recording paper P, these arrangements may be reversed, and further, the arrangement of the recording paper P Regarding the transport path, the second
A transport path for directly transporting the recording paper P to the first printer unit 10 without passing through the printer unit 20 may be provided.

[0029]

As described above, according to the image forming apparatus of the first aspect, the first printer section for forming a monochrome image on the recording paper by the electrophotographic method and the ink jet method or the bubble jet method are used. A second printer unit that forms an image by adhering ink to a recording sheet and one recording sheet sequentially passes through both the first printer unit and the second printer unit, or only one printer unit. When the control unit forms a full-color image on the recording paper, the recording paper passes through both the first printer unit and the second printer unit in order. As described above, the recording medium is conveyed by the conveying unit, and the image corresponding to the black component in the full-color image is formed on the recording sheet conveyed by the conveying unit by the first printer unit. When a second printer unit forms an image corresponding to the non-black color component in the full-color image by sequentially depositing inks of a plurality of colors, a full-color image is formed on the recording paper. As a result, the image quality can be improved compared to a full-color image formed by a conventional inkjet or bubble-jet image forming apparatus, and in the case of forming a monochrome image, Since an image is formed on the recording paper by a process similar to that of the electrophotographic image forming apparatus, the image forming speed on the recording paper can be increased. Further, as compared with a case where a conventional electrophotographic image forming apparatus and an ink jet type or bubble jet type image forming apparatus are purchased and installed in an office or the like, for example, a separation sheet feeding unit, a recording sheet discharging unit, etc. Also, since it becomes possible to use a common conveying means for recording paper and the need for ink nozzles for ejecting black ink in the second printer section, it is possible to reduce the total cost. And, the installation space of the device can be saved.

Further, according to the image forming apparatus of the second aspect, the separation sheet feeding for separating one recording sheet from the bundle of the recording sheets stored in the recording sheet storage section and feeding it to the conveying means. Since the recording paper storage section provided in the main body of the apparatus is provided as a single unit, the apparatus can be downsized and the cost of the apparatus can be reduced.

Further, according to the image forming apparatus of the third aspect, the control unit controls the image forming apparatus of the ink jet type or the bubble jet type to the other paper feeding cassette, for example, the plain paper in one paper feeding cassette. When each of the dedicated papers is loaded and a monochrome image is formed on the recording paper, the recording paper is separately fed from one of the paper feed cassettes, and when a full-color image or a color image containing no black component is formed on the recording paper. By separately feeding the recording paper from another paper feeding cassette, when the image is formed on the recording paper by the second printer unit, the image is formed on the dedicated paper for inkjet printing or bubble jet printing. When ink bleeding or the like is prevented and high image quality can be obtained, and when the image is formed on the recording paper only by the first printer unit, The plain paper can be prevented from wasting special paper because it is fed.

Further, according to the image forming apparatus of the fourth aspect, the apparatus is provided with a recording paper ejecting section on which the recording paper ejected by the conveying means after the completion of the image formation is placed, and which is provided in the apparatus main body. The single recording paper discharge unit can reduce the size of the apparatus and reduce the cost of the apparatus.

Further, according to the image forming apparatus of the fifth aspect, the control unit ejects the recording paper to the first recording paper ejection unit when, for example, a monochrome image is formed on the recording paper. When a full-color image is formed on the recording paper, the recording paper is discharged to the second recording paper discharge unit, and a color image containing no black component is formed on the recording paper. When it is necessary to sort the recording paper according to the type of the image formed on the recording paper by discharging the recording paper to the third recording paper discharging unit, the operation for sorting the recording paper is performed. It can be made unnecessary and the labor of the user can be reduced.

Further, according to the image forming apparatus of the sixth aspect, the conveying means is such that the recording paper on which only the ink image is formed as the image by the second printer section has at least the fixing means in the first printer section. By conveying the recording paper so as to pass therethrough, it is possible to accelerate the drying of the ink adhering to the recording paper by the fixing means.
Even if the color ink adhering to the recording paper is slow to be dried by the printer unit, the ink image formed on the recording paper can be surely dried, and the user ejected the recording paper to the recording paper ejection unit. Even if the recording paper immediately after is touched, it is possible to prevent ink bleeding and color ink from adhering to the user.

Further, according to the image forming apparatus of the seventh aspect, the conveying means causes the recording paper on which only the ink image is formed as an image by the second printer section to pass under a high temperature atmosphere near the fixing means. By transporting the recording paper as described above, it is possible to accelerate the drying of the ink adhered to the recording paper by the high temperature atmosphere, so that the drying speed of the color ink adhered to the recording paper by the second printer unit is slow. In this case, the ink image formed on the recording paper can be surely dried, and even if the user touches the recording paper immediately after being discharged to the recording paper discharge section, ink bleeding or color ink adheres to the user. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a main part of an image forming apparatus according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a main part of an image forming apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

1 ... Paper feeding cassette, 2 ... Paper feeding roller, 3 ... Conveying roller pair, 4 ... Conveying path switching claw, 5 ... Paper discharging roller pair, 6 ...
Paper ejection tray, 8 ... Paper ejection switching claw, 10 ... First printer section, 11 ... Photosensitive drum, 12 ... Charger, 13 ... Optical writing unit, 14 ... Developing device, 15 ... Transfer roller, 16 ...
Cleaning device, 17 ... Static elimination lamp, 18 ... Registration roller pair, 19 ... Fixing device, 20 ... Second printer section, 21 ...
Inkjet head, 22 ... Feeder side roller pair, 23 ...
Paper discharge side roller pair, P ... Recording paper.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location G03G 15/22 103 B41J 3/04 101A

Claims (7)

[Claims] 1. A first printer section for forming a monochrome image on a recording sheet by an electrophotographic method, and a second printer section for forming an image by adhering ink onto the recording sheet by an inkjet method or a bubble jet method. A conveying unit that conveys a recording sheet so that one recording sheet passes through both the first printer unit and the second printer unit in order or only one printer unit, and a full-color image is recorded on the recording sheet. When forming the recording sheet, the recording sheet is conveyed by the conveying section so that the recording sheet may pass through both the first printer section and the second printer section in order, and the recording sheet conveyed by the conveying section may be recorded on the recording sheet. An image corresponding to a black component in a full-color image is formed by the first printer unit, and an image corresponding to a non-black component in the full-color image is formed by the second printer unit. An image forming apparatus, comprising: a controller configured to sequentially form inks of a plurality of colors to form an image. 2. The recording paper provided in the main body of the apparatus, comprising a separating / feeding means for separating one recording paper from a bundle of recording papers stored in a recording paper storage part and feeding the recording paper to the conveying means. The image forming apparatus according to claim 1, wherein the storage unit is single. 3. A separating / feeding unit that separates one recording sheet from a bundle of recording sheets stored in the recording sheet storage unit and feeds the recording sheet to the conveying unit, and the control unit causes the recording image to be monochrome. Depending on whether it is an image or a color image, a predetermined recording paper storage unit is selected from a plurality of recording paper storage units provided in the main body of the apparatus, and the separated recording paper storage unit is selected from the selected recording paper storage unit. The image forming apparatus according to claim 1, wherein the recording sheets are separately fed. 4. A recording paper discharge unit for mounting the recording paper discharged by the conveying unit after completion of image formation, and the recording paper discharge unit provided in the apparatus main body is single. The image forming apparatus according to claim 1, wherein: 5. A recording paper ejecting unit, on which the recording paper ejected by the conveying means is placed after completion of image formation, wherein the control unit is a monochrome image or a color image. Corresponding to the above, a predetermined recording paper discharge unit is selected from the plurality of recording paper discharge units provided in the apparatus main body, and the recording medium is discharged onto the selected recording paper storage unit by the conveying means. The image forming apparatus according to claim 1, wherein: 6. A fixing unit provided in the first printer unit for heating the recording paper, and a recording paper on which only an ink image is formed as an image by the second printer unit are at least in the first printer unit. The image forming apparatus according to claim 1, further comprising a conveying unit configured to convey the recording paper so as to pass through the fixing unit. 7. A fixing unit which is provided in the first printer unit and fixes a toner image by heating a recording sheet on which an unfixed toner image is formed; and as an image, only the ink image is formed by the second printer unit. 2. The image forming apparatus according to claim 1, further comprising: a conveying unit that conveys the recording paper on which the recording paper on which the recording paper is formed is passed under a high temperature atmosphere near the fixing unit.