JP2003015473A - Analog image forming device - Google Patents

Abstract

(57) [Problem] To provide an analog image forming apparatus capable of performing single-sided printing and double-sided printing as in the past, and also capable of printing on the back side of a document printed on only one side. I do. An ADF includes a normal first document discharge unit for discharging a read document (G) and a second document discharge unit for transferring a document (G) discharged from the ADF to a printing unit.
And the first and second document discharge units 14 and 31
Is provided, and the read original (G) carried out of the ADF 2 is carried into the printing means 4 via the manual paper feed unit 22, and another original is placed on the back of the original (G). To make a one-sided original into a two-sided original.

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 capable of double-sided printing, and more particularly, to an analog image forming apparatus capable of saving paper when producing a double-sided printing original from a single-sided original.

[0002]

2. Description of the Related Art In recent years, from the viewpoints of environmental problems and effective use of resources, various copying machines often perform double-sided printing in order to reduce the amount of paper used. For example, JP-A-7
No. 244407 discloses an example of an image forming apparatus capable of double-sided printing, and Japanese Patent Application Laid-Open No. 9-193483 describes a method for controlling double-sided printing.

Also, in terms of document organization, double-sided printing is
Compared with single-sided printing, it is advantageous in that the workability of filing is improved and the space for organizing can be saved, and the tendency of double-sided printing of originals has become remarkable along with unification of paper sizes.

[0004]

However, although it has not been taken into consideration in the past, in the case of making a single-sided original into double-sided in double-sided printing of the original, double-sided printing from the single-sided original to a new recording paper, Moreover, if only the double-sided printed matter is saved, the original single-sided original becomes a waste paper.

In this case, in particular, if the original printed on one side is an important document, the remaining one side cannot be used, and consideration must be given to the confidentiality such as cutting processing, which is environmentally friendly. There was also a problem in terms of recycling.

In this case, it is possible for the operator to operate these originals one by one to print a single-sided original without wasting it. However, such an operation is complicated and actually performed. Seems not to run.

The present invention has been made in view of the above circumstances, and it is possible to perform single-sided printing and double-sided printing as in the conventional case, and also to print on the back side of a document printed on only one side. It is an object of the present invention to provide a simple analog image forming apparatus.

[0008]

The present invention has means for solving the above-mentioned problems as follows.

(1) An automatic document feeder (ADF) for feeding a read document to a document reading unit, a document reading unit (scanner) for reading the conveyed document, a printing unit for printing image information, and a recording sheet for the printing unit. In an image forming apparatus having a paper feeding means for carrying and a paper discharging means for discharging a recording paper on which printing has been completed to the outside, the document carried by the ADF is printed without being read by the scanner. And a step of reading the conveyed original with the scanner, by printing another original read with the scanner on the back side of the original, the single-sided original is printed on both sides. Characterized by a manuscript.

According to this configuration, when an original printed on one side is changed to double-sided printing, information on another one-sided original is printed on the back side of the original on which one side is already printed. The paper can be saved, and at the same time, the labor of printing can be saved.

Further, by printing another original on the back side of the original, it becomes possible to print important documents such as a stamp or a signature on both sides in the state of the original and store them.

(2) The ADF has a normal first original discharging section for discharging the read original and a second original discharging section for conveying the original conveyed by the ADF to the printing means, and It is characterized in that branching means for selecting the first and second document discharge sections is provided.

According to this structure, by providing the branching means in the ADF, it is possible to easily switch the discharge destination different from the normal document discharge destination, and perform printing for converting a single-sided original into a double-sided original. It becomes possible to convey the material to the means.

(3) The original discharged from the discharging means in order to make the single-sided original into a double-sided original is discharged onto the manual paper feeding section of the paper feeding means.

If the manual paper feed section is selected as the document discharge destination from the ADF like this configuration, it is convenient without changing the configuration of the conventional copying machine.

(4) The leading edge of the one-sided original discharged onto the manual feed section is fed to the pick-up roller for manual feed by a call-in roller arranged in the manual feed section. .

According to this structure, by providing the take-in roller, it is possible to reliably catch the document fed to the manual sheet feeding section and convey it to the printing means.

(5) Single-sided printing mode, double-sided printing mode for printing using the paper stored in the paper feeding means, and
It is characterized by having a plurality of modes for printing on the back surface of the document read by the ADF.

With this construction, it is convenient if one copying machine can use the conventional single-sided or double-sided printing mode as well as the backside printing mode of the document of the present invention.

(6) In the mode in which the number of print copies is a part, among the plurality of originals conveyed from the ADF, the odd-numbered originals to be conveyed do not read the image information, and the single-sided original is a double-sided original. The image information of the even-numbered original is discharged by the scanner from the second original discharging section for the purpose of being discharged onto the manual sheet feeding section.

According to this configuration, when the number of prints is a part, it is possible to omit the reading of half of the one-sided originals, and the printing is performed on the back side of the original surface, which is troublesome for printing. Can also be omitted.

(7) The odd-numbered original document guided from the manual paper feeding unit to the printing means prints the image information of the even-numbered original document, which is one more than the number of the conveyed original document, on the back surface of the original document. It is characterized by

With such a structure, the page order of the printed document can be made uniform. In addition, high speed printing becomes possible.

(8) A plurality of originals read by the scanner are characterized by being driven by driving the sub-scanning means in a direction opposite to the normal image reading direction.

Since the page alignment is different depending on whether the original is written vertically or horizontally, it is convenient if the orientation can be selected so that the page alignment is correct as in this configuration. .

(9) The odd-numbered originals printed on both sides are discharged to the discharge tray of the discharge means, and the even-numbered originals read by the scanner are passed through the manual paper feeding section. Then, after passing through the printing unit without being printed, the sheet is discharged to a discharge tray different from the odd-numbered sheets of the discharge unit.

If the even-numbered originals are discharged to a discharge tray different from that of the odd-numbered originals printed on both sides as in this configuration, when the originals printed on both sides are bound. At the same time, it is convenient when reusing the even-numbered original.

(10) In the mode in which the number of copies is two or more, the odd-numbered original is printed on the recording paper fed from the paper feeding means and stored in the intermediate tray, and then the odd-numbered original is printed by the printing means. When the even-numbered original is printed on the back surface of the odd-numbered original, and then the even-numbered original is printed on the recording paper stored in the intermediate tray, according to claims 6 to 8, It is characterized by printing.

According to this structure, even when the number of print copies is two or more, the same operation can be performed by performing the same operation as when the number of print copies is a part, which is convenient.

(11) Instead of the ADF, a manual operation by an operator is possible.

According to this structure, the present invention can be applied to a small-sized image forming apparatus which does not include an automatic document feeder.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the overall structure of the analog image forming apparatus 1. The digital image forming apparatus 1 is an ADF.
(Automatic Document Feed
r) A unit (hereinafter referred to as ADF) 2, an optical reading unit (original reading unit, scanner) 3, and a printing unit (printing unit) 4. The ADF 2 is an automatic document feeding mechanism, and when documents (not shown) are stacked on the document table 5, they are fed one by one to the document reading section 6 by a start signal for reading the documents.

The conveyed original document has a light source 7 and mirrors 8 to 1.
0, the lens 11, and the reflection mirror 12 are temporarily stopped on the platen glass 13 arranged above the optical reading unit 3, and the optical reading unit 3 scans to read the image information on the document. The document thus read is conveyed on the platen glass 13, discharged to a document discharge section (first document discharge section) 14 arranged on the upper surface of the ADF 2, and stacked on the document discharge table 15.

The read image information is visualized by the printing process described below. First, the photoconductor 17 constituting the printing process, the charging unit 18 and the developing unit 19 arranged around the photoconductor 17 perform initial adjustment for printing (removal of residual developer on the photoconductor, removal of residual potential). After that, the charging unit 18 gives an electric charge to the photoconductor 17, and then the image information is recorded on the photoconductor 17 as an electrostatic latent image by irradiation from the LSU unit 16. After that, the developing unit 19
The image information is visualized on the photoconductor 17 by the developer adhering to the electrostatic latent image.
Is rotated to move to the transfer unit 20.

At the same time, in the printing unit 4, depending on the timing at which the original is conveyed to the original reading unit 6, a printing paper feeding unit (paper feeding unit) 21 arranged below the printing unit 4 or the printing unit. A sheet of paper (not shown) is picked up by the pick roller 23 from the manual feed tray (manual paper feed section) 22 arranged on the four side surfaces and conveyed by the PS roller 24. At this time, P
The sheet conveyed to the S roller 24 is carried out from the PS roller 24 at the timing when the leading edge of the image visualized on the photoconductor 17 is aligned with the leading edge of the sheet, and the transfer charger of the transfer unit 20 develops the sheet onto the sheet. Is transcribed.

The paper sheet to which the developer has been transferred passes through a fixing section 25 constituted by a heat roller arranged in the transport path 32 of the printing unit 4, whereby the powdery developer is fused and formed on the paper sheet. Then, the sheet is fixedly attached, and is discharged from a discharge port 27 to a discharge tray section 28 through a discharge roller (sheet discharging means) 26.

Below the transport path 32, a switchback transport path (sub-transport path) for performing back surface printing.
33, the sheet to be carried out to the sheet discharge tray unit 28 is temporarily stopped by the sheet discharge roller 26 and then fed back, and the switching claw 34 causes the switchback conveyance path 33.
After being carried in, it is inverted and conveyed to the PS roller 24.

One of the features of the present analog image forming apparatus 1 capable of double-sided printing is that the conveyance path of the document discharge section 14 of the ADF 2 shown by the arrow in the upper right of FIG. 1 is branched in two directions. You can In order to explain this point in detail, FIG. 2 is an enlarged sectional view of the document discharge section 14.

As shown in FIG. 2, in the present apparatus 1, the document discharge section 14 is provided with a branching claw (branching means) 29 for selecting a document discharge destination. When the branch claw 29 faces the direction B (downward) in the figure, the document read by the ADF 2 is discharged to the document discharge tray 15 as usual, but the branch claw 29 moves in the direction A (upward) in the figure. 2, the document (G) is fed from the second document discharge section 31 to the manual feed tray 22 outside the apparatus as shown in FIG.
The sheet is discharged to the upper portion, dropped as it is, and fed on the manual feed tray 22.

By the way, apart from such a drop method,
Although illustration is omitted, for example, a conveyance path for guiding and conveying the document read by the ADF 2 to the manual feed tray 22 may be provided. The transport path is formed, for example, in a curved shape (clockwise in the state of FIG. 2) downward from the second document discharge section 31 to have a closed cross-sectional shape that can be opened and closed (to eliminate a paper jam), When the document is configured to be connected (removably) to the upper part (opening) of the manual feed tray 22, the document can be reversed during the conveyance process, and can be directly conveyed to the printing unit 4 and printed on the back side. Further, by providing a conveying roller (call-in roller) on the connection opening side of the manual feed tray 22, the document reversing operation (and the call-in operation) can be made easy and reliable.

In the case of the above-mentioned drop method, the manual feed tray 22
3 is provided with a take-in belt 30 as shown in FIG. 3, and the take-in belt 30 rotates clockwise as shown in the figure with respect to the falling paper (document (G)). The paper is sent to the pickup roller 23 of the manual feed tray 22.

The intake belt 30 can be constructed, for example, as follows. That is, one end of the swing frame 301 is rotatably supported inside the frame body 41 of the printing unit 4, and the swing frame 3 is rotatably supported.
01 has one end (pivot end) rotatably supporting a drive roller 302 and the other end, which is a free end side, rotatably supported by an endless belt 304 between the rollers 302 and 303. And the drive roller 302
Is connected to a motor 305 capable of rotating in the normal and reverse directions, and a drive roller 302 is connected to one end of the swing frame 301 via a clutch (not shown).

With such a structure, the clutch is connected in consideration of the timing at which the original (G) falls on the manual feed tray 22 (the driving roller 302 and the swing frame 301).
(Fixing), the motor 305 is started to rotate the invoking belt 30 from the position indicated by the solid line to the position indicated by the broken line (clockwise in the drawing), and the other end side is pressed against the upper surface of the document (G), and the clutch By cutting the sheet and rolling the endless belt 304 in the direction of the arrow, the document (G) can be reliably carried in (called in) to the pickup roller 23.

The analog image forming apparatus 1 thus formed has not only the normal single-sided printing and double-sided printing modes, but also the printing mode for the back side of the original (G). That is, when changing the one-side printed original (G) to the double-sided printing, the apparatus 1 prints the information of another one-sided original on the back side of the one-side printed original (G). As a result, the printer has a print mode in which the printing paper can be saved (the printing paper is not required separately), and at the same time, the labor of printing can be saved to some extent.

The operation of the printing mode for the back side of the original will be described below.

The operation in the case of partially forming a double-sided original will be described with reference to the flowcharts shown in FIGS. At the start of document printing, a print request is made in Step 1, and the document is placed on the document table 5 of the ADF 2 in the next Step 2. Subsequently, in Step 3, it is determined whether or not the print mode for the document is the simplex print mode for simplex printing.

If it is single-sided printing, the process proceeds to the single-sided printing mode of Step 4 and below, and the same single-sided printing is performed. If it is not single-sided printing, the process proceeds to Step 8 and whether the printing mode is the double-sided printing mode. Is judged.

In the normal single-sided printing mode of Step 4, first, the branching claw 29 of the document discharge section 14 is rotated in the direction B in FIG. Then, in Step 5, original reading and printing processing are performed for normal single-sided printing, and in Step 6, the printed paper is ejected to the paper ejection tray unit 28.

At Step 7, it is judged whether or not there is a next original, and if there is a next original, the procedure returns to Step 5 to perform normal processing, and if there is no next original, the processing ends.

In Step 8 when it is determined that the print mode is not single-sided, it is determined whether the print mode is double-sided. If it is the double-sided print mode, the next Step is executed.
Go to p9, and if it is not the duplex printing mode, Step3
Then, it is judged again whether the print mode is single-sided printing or not.

At Step 9, it is judged whether the double-sided printing mode is the normal double-sided printing on the recording paper on which one side is not printed yet. If the double-sided printing mode is the normal double-sided printing, the process proceeds to Step10. Document output unit 14
The branching claw 29 is rotated in the B direction, and the normal double-sided printing operation of Step 11 and below is performed. If it is determined that the normal double-sided printing is not performed, the process proceeds to Step 14.

In the case of a normal double-sided mark, in Stepll, the original is read and printed for double-sided printing, the printed sheet is ejected to the paper ejection tray 28 in the next Step2, and the next original is ejected in Step3. If there is a next original, the process returns to Step 11 to perform the normal original processing again, and if there is no next original, the processing ends.

In Step 4 when it is judged that the printing is not the normal double-sided printing, it is judged whether or not the printing mode is the double-sided printing mode using the back side of the original according to the present invention, and if so, the next Step 5 If not, the process returns to Step 9 again, and it is determined whether the print mode is the normal double-sided print mode.

In the normal print mode, it is processed one by one to determine whether there is the next original. However, in the case of the double-sided print mode utilizing the back side of the original according to the present invention, Two pairs of odd-numbered and even-numbered sheets are processed to determine whether there is a next original.

In Step 5, the branching claw 29 of the document discharge section 14 is rotated in the A direction, and in the next Step 16, the odd-numbered original document passes through the branching claw 29 portion through the sheet conveying path of the ADF 2 and then moves to the second direction. From the document discharge unit 31, as shown in FIG.
As shown in, the sheet is discharged to the upper portion of the manual feed tray 22.

In the next Step 7, the manual feed tray 22
In order to use the back surface of the odd-numbered original document as a printing paper, the paper feeding unit conveys the odd-numbered original document to the PS roller 23 by the intake belt 30 shown in FIG.

In Step 8, the even-numbered original is automatically read using the ADF 2 as in the normal print mode. Then, in Step 9, the information of the read even-numbered original document is printed in the printing unit 4 to the back surface of the odd-numbered original document.

In this case, the image information of the even-numbered original document to be printed can be written in the photoconductor 17 of the printing means 4 in the state where the image information is rotated by 180 degrees in the control section.

At Step 20, the odd-numbered original document on which information on the even-numbered sheet is already printed on the back side is discharged to the first discharge tray 281. Also, Step21
In the ADF 2, since the branch claw 29 of the document discharge unit 14 is in the A direction, the even-numbered document read is discharged to the upper part of the manual feed tray 22. At this time, for example, by moving the branching claw 29, the even-numbered original document is ADF2.
It can also be discharged to the document discharge table 15.

At the next Step 22, the first paper ejection tray 281 on which the odd-numbered originals have already been ejected is moved,
The second paper discharge tray 282 is guided to the discharge port 27, and the Ste
In p23, the even-numbered original document is discharged from the manual feed tray 22 via the printing unit 4 to the second paper discharge tray 282 without being printed.

Next, in Step 24, it is judged whether or not there is the next original, and if there is the next original, in Step 25, the first paper discharge tray 281 is guided to the discharge port 27, and the process returns to Step 15 again. The printing process is performed using the back side of the document, and if there is no next document, the process ends.

Next, the operation in the case of printing two copies of a double-sided original document is that an even-numbered original document whose back side is only a white background is stacked on the manual feed tray according to the flowcharts shown in FIGS. 4 and 5. To start.

Next, in FIG. 4 and FIG. 5, the odd-numbered originals for which double-sided printing is completed are stacked on the ADF 2 in a page order aligned state. Odd-numbered originals (on the ADF) and even-numbered originals (on the bypass tray) with the page order prepared in this way
Is used for printing.

At this time, the image information of the odd-numbered original is
When the document is read by the optical system, it is printed on the back surface of the even-numbered original, but if the discharge is completed in the printed state, the front and back of the printed matter (page order) will not be aligned.

Therefore, the even-numbered originals for which printing has been completed are discharged to the paper discharge tray with the front and back reversed by using the switchback function of the printing process when the respective printing is completed.

Even if the odd-numbered original from which the image information in the original has been read is discharged to the original discharging section 14 of the ADF 2 by the branching claw 29 arranged in the ADF 2, the odd-numbered original is not fed to the manual sheet feeding section 22 of the apparatus. Using the second output tray 28 of the apparatus
It is obvious that the discharge may be carried out in any of the two ways or by any method.

According to the above configuration, when a single-side printed original is changed to double-sided printing, the information of another single-sided original is printed on the back side of the original whose one side is already printed. The printing paper can be saved, and at the same time, the printing labor can be saved to some extent.

[0069]

As is apparent from the above description, the present invention has the following effects.

According to the first aspect, the original conveyed by the ADF is carried into the printing means, and the other side of the original read by the original reading means is printed on the back side of the original to print the single-sided original on the double-sided original. Therefore, by printing the information of another one-sided original on the back side of the original whose one side is already printed, it is possible to save the printing paper and at the same time.
It is also possible to save the trouble of printing.

Furthermore, by printing another original on the back side of the original, it becomes possible to print on both sides an important original such as a stamp or a signature and store it in the state of the original.

According to the second aspect, by providing the branching means in the ADF, it is possible to easily switch the discharge destination different from the normal document discharge destination, and to convert the single-sided original into the double-sided original. It becomes possible to carry the sheet to the printing means.

According to the third aspect of the present invention, since the original discharged from the discharging means is discharged onto the manual paper feeding section of the paper feeding means, there is no need to change the configuration of the conventional copying machine, and a double-sided original is formed. It is possible and convenient.

According to the fourth aspect, since the leading edge of the document is sent to the pick-up roller for manual sheet feeding by the feeding roller arranged in the manual sheet feeding section, the document can be reliably captured and conveyed to the printing unit. I can.

According to the fifth aspect, there are provided a single-sided printing mode in which printing is performed using the paper stored in the paper feeding means, a double-sided printing mode, and a plurality of modes in which printing is performed on the back surface of the original read by the ADF. Therefore, in one copying machine, the conventional single-sided or double-sided printing mode can be used in addition to the printing mode for the back side of the original according to the present invention, which improves convenience.

According to the sixth aspect, in the mode in which the number of print copies is a part, of the plurality of originals conveyed from the ADF, the odd-numbered originals to be conveyed do not read the image information,
The second original document ejecting unit for converting a single-sided original into a double-sided original is ejected onto the manual feeding unit, and the image information of the even-numbered original is read by the scanner. Can be omitted, and since printing is performed on the back side of the original surface, the labor of printing can be omitted.

According to the seventh aspect, the odd-numbered original document guided from the manual paper feeding unit to the printing means prints the image information of the even-numbered original document, which is one more than the number of the conveyed original document, on the back surface of the original document. Therefore, the page order of the printed document can be made uniform. In addition, high speed printing becomes possible.

According to the eighth aspect of the present invention, since the plural sheets of originals read by the scanner are driven by driving the sub-scanning means in the direction opposite to the normal image reading direction, the orientation is adjusted so that page alignment is correct. Can be selected,
It is convenient.

According to the ninth aspect, since the even-numbered originals are discharged to the discharge tray different from the odd-numbered originals printed on both sides, it is convenient when binding the two-sided printed originals. At the same time, it is convenient for reusing the even-numbered original.

According to the tenth aspect, even when the number of printed copies is two or more, the same operation is performed as when the number of printed copies is partial, so that the same configuration can be used, which is convenient.

According to the eleventh aspect of the present invention, since the operator can manually operate instead of the ADF, the present invention can be applied to a small-sized image forming apparatus which does not include an automatic document feeder, which is convenient. Is improved.

[Brief description of drawings]

FIG. 1 is a configuration explanatory diagram of an analog image forming apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part configuration of the same.

FIG. 3 is an enlarged view of the relevant part.

FIG. 4 is a part of a flowchart for partially creating a double-sided original from the same single-sided original.

FIG. 5 is the rest of the flowchart.

[Explanation of symbols]

1-Analog image forming apparatus 2-Automatic document feeder (ADF) 3-Document reading means (scanner) 4-Printing means 14-First original discharging section 21-Paper feeding means 22-Manual Feed Unit 26-Paper discharge means 29-Branching means 31-Second Document Ejecting Section

Continued front page    F-term (reference) 2H027 DB04 DB05 DB08 ED12 ED13                       FA13 FA15 FA20 FA30                 2H076 BA19 BA56 BA61 BA65 BA82                       BA83 BA91 BB10                 3F053 EA01 EC03 LA01 LB02                 3F063 AA01 CA00

Claims (11)

[Claims] 1. An automatic document feeder (ADF) for feeding a read document to a document reading unit, a document reading unit (scanner) for reading the transported document, a printing unit for printing image information,
In an image forming apparatus having a paper feeding unit that conveys a recording sheet to a printing unit and a sheet ejection unit that ejects a recording sheet that has finished printing to the outside, the document conveyed by the ADF is not read by the scanner. A step of carrying the document to the printing means only by carrying it, and a step of reading the carried document by the scanner, and printing another document read by the scanner on the back surface of the document. An analog image forming apparatus, wherein a single-sided original is changed to a double-sided original. 2. The ADF includes a normal first document discharging unit for discharging a read document, and a second document discharging unit for transferring the document transported by the ADF to the printing unit, and 2. The analog image forming apparatus according to claim 1, further comprising branching means for selecting the first and second document discharge sections. 3. The document as claimed in claim 2, wherein the document ejected from said ejecting means in order to make said one-sided original into a double-sided original is ejected onto a manual paper feeding section of said paper feeding means. Analog image forming device. 4. The leading edge of the one-sided original discharged onto the manual paper feeding unit is fed to a pickup roller for manual paper feeding by a call-in roller arranged in the manual paper feeding unit. Item 4. The analog image forming apparatus according to Item 3. 5. A single-sided printing mode, a double-sided printing mode in which printing is performed using a sheet stored in the sheet feeding unit, and a plurality of modes in which printing is performed on the back side of the document read by the ADF. The analog image forming apparatus according to any one of claims 1 to 4. 6. In a mode in which the number of print copies is a part,
Among the plurality of originals conveyed from the ADF, the image information of the odd-numbered originals to be conveyed is not read, and the single-sided original is changed to the double-sided original from the second original discharging section to the manual sheet feeding section. 6. The analog image forming apparatus according to claim 5, wherein the image information of the even-numbered original document discharged to the upper side is read by the scanner. 7. The image information of the even-numbered original, which is one more than the number of sheets of the conveyed original, is printed on the back surface of the original for the odd-numbered original that is guided from the manual paper feeding unit to the printing unit. The analog image forming apparatus according to claim 6. 8. The analog image forming apparatus according to claim 7, wherein a plurality of originals read by the scanner are formed by driving a sub-scanning unit in a direction opposite to a normal image reading direction. . 9. The double-sided printed odd-numbered original document is discharged to a discharge tray of the discharge unit, and the even-numbered original document read by the scanner is passed through the manual paper feeding unit. 9. The analog image forming apparatus according to claim 7, wherein after passing through the printing unit without being printed, the sheet is discharged to a discharge tray different from the odd-numbered sheet of the discharge unit. 10. In a mode in which the number of copies is two or more, an odd-numbered original document is printed on a recording paper fed from the paper feeding unit and stored in an intermediate tray, and then the odd-numbered original document is printed by the printing unit. 9. When the document is conveyed, the even-numbered document is printed on the back surface of the odd-numbered document, and then the even-numbered document is printed on the recording paper stored in the intermediate tray, the method according to claim 6 or 8.
The analog image forming apparatus according to claim 5, wherein the analog image forming apparatus prints according to the above. 11. The analog image forming apparatus according to claim 1, wherein the ADF can be manually operated by an operator instead of the ADF.