JPH0723156A - Copying machine - Google Patents

Abstract

PURPOSE:To eliminate useless copying by stopping copying of a blank paper sheet and executing copying as to a picture face only in the case of copying an original in which blank paper, one side paper and double side paper are in existence in mixture. CONSTITUTION:When a double side original, a one-side original and a blank original are set in mixture to an automatic carrier 16, the blank paper face is detected by front side or rear side picture sensors 21, 22 and only a picture of the print side is read by an image scanner and copied on one side of recording paper. That is, in an original whose front side is printed with a picture A and whose rear side is printed with a picture B, the picture A is copied on a 1st sheet and the original is reversed by a device 16 and the picture B is copied on a 2nd recording paper sheet. When a picture C is on the front side and the rear side is white, only the picture C is copied on a 3rd sheet and no reading is executed for the side of blank paper. Furthermore, when the front side is white and the rear side has a picture D, no reading is executed for the front side and only the picture D of the rear side is copied on a 4th sheet. The operation above is repeated and only the printed side is copied on one recording paper to be outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine equipped with an automatic transport device.

[0002]

2. Description of the Related Art As a copy mode of a copying machine,
In addition to the normal single-sided / single-sided mode in which one side of the original paper is copied onto one side of the copy paper, there is also a so-called double-sided copy mode in which the original paper printed on both sides is directly copied on both sides of the copy paper. 2. Description of the Related Art There is a copying machine having a double-sided / single-sided mode in which the front and back sides of a printed original sheet are separately copied onto two copy sheets. Also, depending on the copying machine,
Some have a single-sided / double-sided mode in which two original sheets printed on only one side are copied onto one copy sheet. Also,
After the original paper is conveyed to a predetermined position on the platen glass and a well-known copying operation is performed, the original paper is not discharged to the outside of the machine but is taken inside the device again and inverted, and the inverted original paper is removed. There is a copying machine equipped with an automatic transport device having a function of transporting again onto the platen glass. With such a copying machine, the above-mentioned double-sided copying can be performed more easily.

[0003]

In the conventional copying machine, each of the above modes must be set by the user in advance before starting the copying operation. Therefore, for example, in the duplex-duplex mode, even if the document sheet set on the automatic transporting device includes a document sheet on which only one side is printed, there is no need to scan the blank side and print it. Actions are performed. Further, in the double-sided / single-sided mode, when the original paper set on the automatic transporting device includes the original paper on which only one side is printed, the copy paper is unnecessarily blank copied every few minutes. .

On the other hand, there is provided means for detecting whether or not printing is performed on the back surface of the original sheet during conveyance of the original sheet.
If it is detected that the back side is printed, the duplex mode is executed.If nothing is printed on the back side of the document paper, the automatic detection function of the copy mode that executes normal single-sided copy is used. A copier provided is disclosed (Japanese Patent Laid-Open No. 3-215871). In the above invention, there is an advantage that the trouble of setting the mode by the user by the automatic detection function of the copy mode, particularly the trouble of sorting the manuscript paper set on both sides and the one-sided printed manuscript paper in a mixed manner can be saved. There is. However, in the above copying machine, since the presence or absence of printing is detected only on the back side of the manuscript paper, if the manuscript paper is printed on only one side and the blank side is set face up, printing on the back side Is detected, the document sheet is erroneously determined to be a document sheet printed on both sides, and double-sided copying is executed. In this case, even though the front side is blank, normal double-sided copying is performed, and thus useless operation is performed.

Therefore, according to the present invention, in a copying machine having a double-sided copying function, even if the originals set on the automatic transporting device are mixed with originals printed on both sides and one side, it is possible to make more efficient copies. The purpose is to provide a copying machine.

[0006]

According to a first aspect of the present invention, there is provided a copying machine including: an executing unit for copying an original image on one side and / or both sides of a copy sheet; and both sides of the original sheet.
Based on the detection means for detecting the presence / absence of a blank surface and the detection result of the detection means, it is determined whether the original paper is printed on both sides, the original paper is printed on only one side, or both sides are blank original paper. Whether or not there is a discriminating means, a controlling means for controlling the executing means based on the discriminating result of the discriminating means so as to execute the copying operation unified on one side and / or both sides, and eject the copied copy sheet. And discharging means.

According to a second aspect of the present invention, there is provided a copying machine according to the first aspect.
In the copying machine described in (1), the executing means reverses the document sheet on the document table glass and transporting means for conveying the document sheet to a predetermined position on the document table glass, and again on the document table glass. The reversing means conveys the image of the original paper on the original platen glass to a copy paper, and the control means is such that the determining means is the original paper printed on both sides. When the determination is made, a first control in which the front surface of the original sheet is copied to the copy sheet by the copying unit, the original sheet is inverted by the reversing unit, and the back side of the original sheet is copied to another copy sheet by the copying unit, When the determination means determines that the original paper is printed on only one side, and the printing is performed on the front surface of the original paper, the copying means copies the front surface of the original paper and prints on the back surface of the original paper. Has been In this case, the copying operation is not performed on the front surface of the blank sheet, the original sheet is reversed by the reversing unit, and only the back side on which the original sheet is printed is copied by the copying section. When it is determined that the original sheet is the sheet, the third control for canceling the copy operation for the original sheet is executed.

According to a third aspect of the present invention, there is provided a copying machine according to the first aspect.
In the copying machine described in (1), the executing means reverses the document sheet on the document table glass and transporting means for conveying the document sheet to a predetermined position on the document table glass, and again on the document table glass. An original reversing means for conveying to a predetermined position; a copying means for copying the image of the original paper on the original table glass onto a copy paper; and a copy paper reversing means for reversing the copy paper copied by the copying means, When the determination means determines that the original paper has been printed on both sides, the control means causes the copy means to copy the front surface of the original paper, and then the original inversion means reverses the original paper to make a copy paper inversion means. To reverse the copy paper,
When the first control for copying the back side of the manuscript paper by the copying means and the judging means judges that the manuscript paper is printed on only one side, and the front surface of the manuscript paper is printed, the copying means Copy the surface of the original paper by
Further, when the back side of the original sheet is printed, the copying operation is not performed on the front side of the blank sheet, the original sheet is inverted by the original inverting means, and the reverse side of the inverted original sheet is copied by the copying means. When the determining means determines that the original is blank on both sides, the third control is executed to cancel the copying operation for the original.

According to a fourth aspect of the present invention, there is provided a copying machine according to the first aspect.
In the copying machine described in (1), the executing means reverses the document sheet on the document table glass and transporting means for conveying the document sheet to a predetermined position on the document table glass, and again on the document table glass. An original reversing means for conveying to a predetermined position; a copying means for copying the image of the original paper on the original table glass onto a copy paper; and a copy paper reversing means for reversing the copy paper copied by the copying means, When the determination means determines that the document sheet is double-sided printed, the control means,
After copying the front surface of the original paper by the copying means, the original paper is inverted by the original inverting means, the copy paper is inverted by the copy paper inverting means, and the back side of the original paper is copied by the copy means to the inverted copy paper. 1 control and when the determination means determines that the original paper is printed on only one side, the copying means copies the printing surface of the original paper, and then the transfer means separates other than the original paper whose both sides are blank. Waiting for the original document sheet to be conveyed onto the platen glass, the copy sheet reversing unit reverses the copy sheet, and the copying unit copies the printing surface of the other original sheet to the inverted copy sheet. It is characterized in that the control and the third control, when the determining means determines that the document paper is blank on both sides, cancels the copying operation for the document paper.

The copying machine described in claim 5 is the same as claim 1.
In the copying machine described in (1), the executing means reverses the document sheet on the document table glass and transporting means for conveying the document sheet to a predetermined position on the document table glass, and again on the document table glass. The control unit includes a reversing unit that conveys the image of the original sheet on the platen glass to a predetermined position on the copy sheet at a predetermined position. When it is determined that the original paper is printed, the image on the front surface of the original paper is reduced by the copying means, the reduced image on the front surface is copied to the half area of the copy paper, and then the original paper is changed by the reversing means. The first control for reversing and reducing the image on the back side by the copying means and copying the reduced image on the back side to the remaining half area of the same copy paper, and the determining means for the original paper printed on only one side If you decide that there is When the front side of the original paper is printed, the copy means is used to make a copy. When the back side of the original paper is printed, the front side of the blank paper is not copied and the original paper is reversed by the reversing means. By doing so, when the second control for copying only one side of the original paper printed by the copying means and the determining means determines that the original is blank on both sides, the copy operation for the original paper is canceled. The third control is executed.

According to a sixth aspect of the present invention, there is provided a copying machine according to the first aspect.
In the copying machine described in (1), the executing means reverses the document sheet on the document table glass and transporting means for conveying the document sheet to a predetermined position on the document table glass, and again on the document table glass. An original reversing means for conveying to a predetermined position; a copying means for copying the image of the original paper on the original table glass onto a copy paper; and a copy paper reversing means for reversing the copy paper copied by the copying means, When the determination unit determines that the first sheet is the original sheet printed on both sides, the control unit sequentially copies only the printed side of the following original sheets to both sides of the copy sheet. And a second control for sequentially copying only the printed side of the following document sheets to the front side of the copy sheet when the determining unit determines that the first sheet is the document sheet on which only one side is printed. , The first discriminating means is white If it is determined that the document sheet, and executes the third control to cancel the copy operation by the copying means

[0012]

In the copying machine according to the first aspect of the present invention, the presence or absence of the blank surface is detected by the detecting means on each of the front and back surfaces of the original paper. Based on the detection result, the determining unit determines whether the original paper is printed on both sides, the original paper is printed on only one side, or the original paper is blank on both sides. The control means cancels the copying operation itself for the blank side of the original sheet and controls the execution means so as to execute the copying operation only for the printed side based on the result of the determination by the determining means. / Or execute the unified copy operation on both sides. For example, when performing double-sided copying, the control unit controls the execution unit to control the original document even if the document sheets conveyed on the platen glass by the conveying unit include both double-sided original documents, single-sided original documents, and blank original documents. The copying operation is executed only on the printing surface of the paper. Therefore, only the printed image on the original paper is uniformly copied on both sides of the copy paper and output by the output means.

According to a second aspect of the present invention, there is provided the copying machine according to the first aspect, wherein the control means determines the copying means when the determination means determines that both sides of the original paper are printed. After the front surface of the original is copied by, the original paper is inverted by the inverting means, and the first control is performed to copy the back surface of the original paper onto another copy paper. In addition, when the determination unit determines that only one side of the document sheet is printed, and when the surface of the document sheet is printed, the control unit determines the image on the surface of the document sheet by the copying unit. When copying is performed and printing is performed on the back surface of the original paper, the copying operation is not performed on the front surface of the blank paper, the original paper is inverted by the reversing unit, and the image on the back surface of the original paper is copied onto the copy paper by the copying unit. 2 Execute control. Furthermore,
When the determination unit determines that both sides of the document sheet are blank, the control unit executes the third control for canceling the copy operation for the document sheet.

According to a third aspect of the present invention, in the copying machine according to the first aspect, the control means determines the copying means when the determination means determines that the original paper is printed on both sides. After copying the image on the front surface of the original sheet by means of the original sheet, the original sheet is inverted by the original sheet inverting means, the copy sheet is inverted by the copy sheet inverting means, and the image on the back side of the copy sheet is copied to the inverted copy sheet. Execute control. In addition, when the determination unit determines that the original sheet is printed on only one side and the surface of the original sheet is printed, the control unit causes the copying unit to copy the surface of the original sheet as it is, and If the back side of the document sheet is printed, the second side control is performed to copy the image on the back side of the document sheet by inverting the document sheet by the reversing means without performing the copying operation on the front side of the blank sheet. To do. further,
When the determination unit determines that both sides of the document sheet are blank, the control unit executes the third control for canceling the copy operation for the document sheet.

According to a fourth aspect of the present invention, there is provided the copying machine according to the first aspect, wherein the control means causes the copying means to perform the double-sided printing if the determination means determines that the document paper is printed on both sides. After copying the image on the front side of the original sheet, the original sheet is inverted by the original sheet inverting section, the copy sheet is inverted by the copy sheet inverting section, and the image on the back side of the original sheet is copied to the inverted copy by the copying section. 1 Execute the control. Further, when the determining means determines that only one side of the original paper is printed, the control means copies the image on the printing surface by the copying means, and then the original paper other than the blank original is transferred by the conveying means. Waits for the sheet to be conveyed onto the platen glass, the copy sheet reversing means reverses the copy sheet, and the copying means executes a second control for copying the image of the other original sheet. Furthermore, when the determination unit determines that both sides of the original sheet are blank, the control unit determines
The third control for canceling the copy operation for the document sheet is executed.

According to a fifth aspect of the present invention, there is provided a copying machine according to the first aspect, wherein the control means determines that the document sheet is printed on both sides of the document sheet when the determining means determines that both sides of the document sheet are printed. The image on the front side is reduced, the reduced image on the front side is copied onto a half area of the copy sheet, the document sheet is inverted by the inversion means, the image on the back side is reduced, and the reduced image on the back side is converted into the above-mentioned image. The first control for copying the remaining half area of the copy paper is executed. In addition, when the determination unit determines that only one side of the document sheet is printed, and the surface of the document sheet is printed, the control unit causes the copying unit to copy the image on the front side, and When the back surface of the original paper is printed, the copying operation is not performed on the front surface of the blank paper, and the second paper control is executed by reversing the original paper by the reversing means and copying the image on the back surface of the original paper. Further, when the determining unit determines that both sides of the original sheet are blank, the control unit executes the third control for canceling the copy operation for the original sheet.

According to a sixth aspect of the present invention, there is provided a copying machine according to the first aspect.
In the copying machine described in, when the determining unit determines that the first original sheet is printed on both sides, only the printed side of the original sheet after the original is printed. The first control for sequentially copying on both sides of the copy sheet is executed. Further, when the first original sheet is an original having only one side printed by the determining section, the control section sequentially copies only the printed side of the original sheets after the original to the front side of the copy sheet. Execute control. Further, when the discriminating means determines that the first original sheet is a blank original, the control means executes the third control by the copying means to stop the copying operation.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The copying machine of the present invention is equipped with an automatic conveyance device capable of automatically reversing and conveying a copy sheet and having an image detection sensor for detecting the presence or absence of printing on both sides of a document sheet. A total of five modes are provided as copy modes using the detection result of the sensor. In the first mode, the manuscript paper printed on both sides (hereinafter referred to as the two-sided manuscript), the manuscript paper printed on only one side (hereinafter referred to as the one-sided manuscript), and the manuscript paper whose both sides are blank (hereinafter referred to as the blank manuscript). .) Are mixed and set in the automatic transport device, only the image on the printing surface of each original is read by the image scanner based on the detection result by the above-mentioned detection means, and the read image is read on one of the copy sheets. Copy on the surface. In the second mode, when a double-sided original, a single-sided original, and a blank original are mixed and set in the automatic transport device, the double-sided copy is performed on the double-sided original and only the print side is printed on the single-sided original. The reading and single-sided copying are executed, and the copying operation is canceled for the blank original. In the third mode, when a double-sided original, a single-sided original, and a blank original are mixed and set in the automatic conveyance device, only the image on the printing surface of each original is scanned by the image scanner based on the detection result of the detection unit. Scan the image with, and copy the scanned image onto both sides of the copy paper. Cancel the copy operation for blank documents. In the fourth mode, when a double-sided document, a single-sided image, and a blank image are mixed and set in the automatic transport device, only the printing surface of the single-sided document is read based on the detection result of the detection unit. , 1-sided copy is executed, and both sides of a double-sided original are reduced and copied on one side of copy paper. Cancel the copy operation for blank documents. In the fifth mode, the first mode is executed when the first original sheet set on the automatic transport device is a single-sided original, and the third mode is executed when the first original sheet is a double-sided original.
The mode is executed, and when the first document sheet is a blank document, the copying operation is stopped. Hereinafter, the copying machine of the present invention will be described in the following order with reference to the accompanying drawings. (1) Overall structure of copier body (2) Description of each mode <2-1> First mode <2-2> Second mode <2-3> Third mode <2-4> Fourth mode <2 -5> Fifth mode (3) Description of copy processing routine <3-1> Main routine <3-2> Key input processing <3-3> First mode copy processing <3-4> Second mode copy processing <3-5> Third mode copy process <3-6> Fourth mode copy process <3-7> Fifth mode copy process

(1) Overall Structure of Copying Machine Main Body FIG. 1 is a sectional view of a digital color copying machine having five copying modes according to the present embodiment. The copying machine is composed of a copying machine main body that executes a normal digital photo copying operation, and an automatic conveying device 16 that sequentially conveys the set original sheets onto the original platen glass and can reverse the original sheets. It The automatic transport device 16 places the set original document paper at a predetermined position on the original platen glass 1a included in the image reading device 1. The image reading apparatus 1 uses the image scanner 1 to scan image data of a document sheet placed on the document table glass 1a.
The image data is read using b, and the read image data is output to the exposure device 7. The exposure device 7 outputs a modulated laser beam based on the digital image data of the original image received from the image reading device 1. The laser light output from the exposure device 7 irradiates the photosensitive drum 2 that is uniformly charged by the charging device 3. An electrostatic latent image of a document image is formed on the photoconductor drum 2 by irradiation with laser light. The developing device 8 includes four color toners of yellow: Y, magenta: M, cyan: C, and black: B, and the electrostatic latent image formed on the photoconductor drum 2 has any one of the above four colors. Apply color toner. The copy sheet is conveyed from the sheet feeding device 9 and wound around the transfer drum 10. The toner image formed on the photoconductor drum 2 is transferred by the transfer charger 11 onto the copy paper wound around the transfer drum 10. An electrostatic latent image is formed again on the photoconductor drum, and toner of another color is attached by the developing device 8. The developed copy paper is
It is conveyed to the fixing device 13 via the conveying belt 12 and a fixing process is performed. The copy paper that has undergone the fixing process is discharged as it is outside the copying apparatus. However, when copying is performed on both sides of the copy paper, the discharge bus switching tab 1
4 is switched and the copy paper is output to the reversing unit 15. The copy paper output to the reversing unit 15 is held for a predetermined period, then switched back, and then wound around the transfer drum 10 again to be used for double-sided copying.

FIG. 2 shows a sectional view of the automatic carrier 16. The automatic conveyance device 16 includes a front surface image detection sensor 21 that recognizes whether or not there is printing on the front surface of the original paper, and a back surface image detection sensor 2 that recognizes whether or not there is printing on the back surface of the original paper.
2 and. The original sheets set on the original tray 38 are conveyed one by one to the registration rollers 29 by the upper and lower separating rollers 26 and 27. Surface image detection sensor 21
Also, the back side image detection sensor 22 recognizes whether or not there is printing on the front side and the back side of the original sheet. The front surface image detection sensor 21 includes a light source 21a for reading the front surface of a document, a self-hook lens 21b, and a recognition CCD 21c. The back surface image detection sensor 22 includes a light source 22a for reading the front surface of the document, a self-hook lens 22b, and a recognition CCD 22c. Surface image detection sensor 2
1 and the back side image detection sensor 22
Irradiation is performed by the light sources 21a and 22a. Recognition CCDs 21c and 2 through the self-hook lenses 21b and 22b
Based on the information input to 2c, a double-sided original and a single-sided original are discriminated, and further, a single-sided original is printed on only the front side and the backside is printed on the original.

The original sheet sent to the registration roller 29 is rotated by the registration roller 29, and the original sheet glass 1 is rotated by a belt wound around the rollers 30 and 31.
It is conveyed to a predetermined position on a. After the image data of the original image is read by the image scanner 1b provided in the image reading apparatus 1, the single-sided original is conveyed by the conveyance belt and is conveyed outside the copying machine along the reversing roller 33, the reversing roller 34, and the discharge roller 36. The paper is discharged to the paper discharge tray 37 of. Further, in the case of a double-sided original, instead of switching the reversing / paper ejection switching tab 35 and ejecting the paper to the paper ejection tray 37, the original table is re-established via the reversing roller 33, the reversing roller 31, and the conveyor belt driving roller 32. It is conveyed to a predetermined position on the glass 1a.

FIG. 3 is a diagram showing the system configuration of the copying machine of this embodiment. The system is roughly divided into a control unit 51 for controlling the main body of the copying machine and a control unit 52 for controlling the automatic transport device 16. The control units 51 and 52 are connected to each other. An operation panel 54, a reversing unit section 15, a sheet feeding unit section 9, a process control section 56, and other input / output 55 are connected to the control section 51 of the main body. The automatic conveyance device controller 52 includes a front surface image detection sensor 21 and a rear surface image detection sensor 22.
And other input / output 53 are connected. The control unit 51 of the main body includes a microcomputer including a CPU, a ROM, a RAM, an I / O, etc., mode setting and display from the operation panel 54, an input for each sensor of the reversing unit 15, and an output for control. , Input / output control from the processing process control unit 56 that executes the copying operation in each mode is executed. Further, the automatic carrier control unit 52 is also the control unit 51
Similarly to the above, a microcomputer is provided and the main body control unit 51
The automatic conveyance device 16 is controlled on the basis of each information from the above and information from the front surface image detection sensor 21 and the back surface image detection sensor 22 of the original paper.

FIG. 4 is a front view of the operation panel 54 provided in the main body of the copying machine. The operation panel 54 includes a liquid crystal touch panel 60 that displays necessary information for setting the copy mode and various copy conditions such as the number of copies, a ten-key pad 61 for inputting information such as the number of copies, and copy conditions. Clear key 62 used for changing the display, a panel reset key 63 for returning the panel 60 to the initial screen, a stop key 95, a copy start key 66, and a copy used for selecting the first to fifth copy modes. It is composed of a mode select key 67 and LEDs 68 to 72 for displaying the set copy mode. Each time the select key 67 is pressed, the setting copy mode is repeatedly changed in the order of the first mode → second mode → third mode → fourth mode → fifth mode → first mode →. Where LE
D68 is lit when the first mode is set. LE
D69 lights up when the second mode is set. LE
D70 is lit when the third mode is set. LE
D71 lights up when the fourth mode is set. LE
D72 lights up when the fifth mode is set.

(2) Description of each mode Hereinafter, each copy mode provided in the copying machine of the present invention will be described in order. <2-1> Description of First Mode In the first mode, when a double-sided original, a single-sided original, and a blank original are set in the automatic conveyance device 16 in a mixed manner, the blank side is set to the image detection sensors 21 and 22. Then, only the image on the printing surface is read by the image scanner 1b, and the read image is copied onto one side of a copy sheet. More specifically, as shown in FIG. 5, with respect to the first double-sided original having the image A printed on the front surface and the image B printed on the back surface,
First, the image A printed on the front surface of the original paper is copied on the front surface of the first copy paper and output. Next, the document sheet is reversed by the automatic transport device 16, and the image B printed on the back side is copied on the front side of the second copy sheet and output. Further, for the second single-sided original having the image C printed on the front side and the blank back, the image C printed on the front side of the original sheet is copied onto the front side of the third copy sheet. Output. Image scanner 1 for the blank side of the back
The reading operation itself by b is not executed. Further, for the third single-sided original whose front side is blank and image D is printed on the back side, the reading operation by the image scanner 1b is not executed on the front side of the blank sheet, and the automatic transport device 1
After the document sheet is reversed by 6, the image D on the back side of the document sheet is read by the image scanner 1b, and the read image D is copied and output on the front side of the fourth copy sheet. Also, for the fourth double-sided original having the image E printed on the front side and the image F printed on the back side, it is printed on the front side of the original sheet in the same manner as the first double-sided original. Image E is copied and output on the front side of the fifth copy sheet, the original sheet is inverted by the automatic conveying device 16, and the image F printed on the back side of the original sheet is copied on the sixth sheet. Copy on the front side of the paper and output. Also, the 5th blank paper on the front and back
For the first blank document, the reading operation itself by the image scanner 1b is stopped.

<2-2> Description of Second Mode In the second mode, when the original sheets set in the automatic conveying device 16 are a mixture of double-sided originals, single-sided originals and blank originals, the originals being conveyed are conveyed. If the paper is a double-sided original, double-sided copying is executed. If the conveyed original sheet is a single-sided original, single-sided copying is executed. If the original paper is blank, the image scanner 1b
The original document is ejected as it is without performing the scanning operation by. More specifically, as shown in FIG. 6, for the first double-sided original having the image A printed on the front side and the image B printed on the back side, double-sided copying is performed to print on the front side. The image A outputs the first copy sheet on which the image B is copied on the back side. Further, for the second single-sided original having the image C printed on the front surface and the back surface being blank, the image C is copied and output on the front surface of the second copy sheet. Here, the image scanner 1b is used for the blank surface on the back of the original paper.
Do not execute the reading operation by. Further, for the third one-sided original whose front side is white paper and image D is printed on the back side, the reading operation by the image scanner 1b is not executed on the front side of the white paper, and the original is conveyed by the automatic conveyance device 16. After reversing the sheet, the image scanner 1b reads the image D on the back side of the document sheet, and the read image D
A copy is made on the back side of the first copy sheet and is output. For the fourth double-sided original having the image E printed on the front side and the image F printed on the back side, double-sided copying is performed in the same manner as the first double-sided original, and the image is printed on the front side. The fourth copy sheet in which E is copied and the image F is copied on the back side is output. The image scanner 1b stops the reading operation for the fifth blank original document on the front and back surfaces.

<2-3> Description of Third Mode In the third mode, the original sheets set on the automatic conveying device 16 are a mixture of double-sided originals, single-sided originals, and blank originals, and the originals have been conveyed. When the original sheet is a single-sided original, the printing surface of the single-sided original is first copied onto the front surface of the copy sheet. On the back side of the copy paper, the image printed on the front side of the next original image (however, the image on the back side in the case of a single-sided original printed only on the back side) is copied. In this manner, the image scanner 1b reads only the image on the printing surface of the document sheet set in the automatic transport device 16, and the read image is sequentially copied to the front and back sides of the copy sheet. More specifically, as shown in FIG. 7, double-sided copying is executed for the first double-sided original having the image A printed on the front side and the image B printed on the back side, and the double-sided copy is performed on the front side. Image A
The first copy sheet with the image B copied on the back side is output. In addition, the image C is printed on the front side of the second single-sided document whose back side is blank and whose back side is blank.
Read with b. The read image C is copied on the front surface of the second copy sheet. Then, the second one-sided original document is discharged. Next, the front side is blank and image D is on the back side.
With respect to the third single-sided original on which is printed, the front side of the blank sheet is reversed without performing the reading operation by the image scanner 1b. The image D of the reverse side of the reverse side of the third sheet of the one-sided original is read by the image scanner 1b, and the read image D is copied onto the back side of the second copy sheet.
In this way, the second copy sheet printed on both sides is output. Double-sided copying is performed on the fourth document sheet having the image E printed on the front side and the image F printed on the back side, as in the case of the first double-sided document described above.
The third copy sheet having the image E on the front side and the image F on the back side is output. For the fifth blank white document on the front and back sides, the reading operation itself by the image scanner 1b is stopped.

<2-4> Description of Fourth Mode In the fourth mode, when the original sheets set on the automatic transport device 16 are a mixture of double-sided originals, single-sided originals, and blank originals, and single-sided originals. Performs a one-sided copy, and in the case of a two-sided original, x0.70 is printed on each side of the copy paper.
Copy that prints the front and back images that have been reduced 7 times by rotating them 90 degrees side by side (hereinafter referred to as 2 in 1 copy).
To execute. More specifically, as shown in FIG. 8, for the first double-sided original having the image A printed on the front surface and the image B printed on the back surface, the image A is read by the image scanner 1b. , Read image A x 0.70
The image is reduced to 7 times, rotated 90 degrees, and copied on the left side of the front surface of the first copy sheet. Next, the first double-sided original is inverted, the image B is read, and the read image B is x0.70.
The image is reduced to 7 times, rotated 90 degrees, copied to the right side of the front surface of the first copy sheet, and then the copy sheet is output. For the second single-sided original having the image C printed on the front side and the blank back, the image C is read by the image scanner 1b, and the read image C is copied on the front side of the second copy sheet. , Output this. For the third sheet of one-sided document whose front side is blank and image D is printed on the back side, the image scanner 1b does not perform night reading operation itself on the front side of the blank sheet, The original is inverted and the image D is read by the image scanner 1b. The read image D is copied on the surface of the third copy sheet and is output. For the fourth double-sided original having the image E printed on the front surface and the image F printed on the back, the image E is scanned by the image scanner 1 as in the case of the first double-sided original.
The read image E is read by b, the read image E is reduced by 0.707 times, rotated by 90 degrees, and copied on the left side of the front surface of the fourth copy sheet. Next, flip the above-mentioned fourth double-sided original,
The image F is read, the read image F is reduced to × 0.707, the image is rotated 90 degrees and copied on the right side of the front surface of the fourth copy sheet, and then the copy sheet is output.

<2-5> Description of Fifth Mode The fifth mode is a case where the original sheets set in the automatic conveying device 16 include both double-sided originals and single-sided originals. In the case of a one-sided original, the above-mentioned first mode is executed for the subsequent original sheets. In the case of a double-sided original, the above-mentioned third mode is executed for subsequent original sheets. If it is a blank document, the copying operation is stopped at that point. This eliminates the need for the user to set the copy mode.

(3) Description of Copy Process Routine <3-1> Description of Main Routine FIG. 9 is a flowchart of the main routine of the copy process executed by the controller 51 of the copying machine main body shown in FIG. After the power of the copying machine main body is input, the entire system is initialized (step S10). Next, a key input process (step S100) for selecting a mode to be executed next is executed. When the mode set by the key input process is the first mode (YES in step S11), the first mode copy process is executed (step S200). When the mode set by the key input process is the second mode (step S1
If YES in step 2, the second mode copy process is executed (step S300). When the mode set by the key input process is the third mode (YES in step S13), the third mode copy process is executed (step S400). When the mode set by the key input process is the fourth mode (YES in step S14), the fourth mode copy process is executed (step S500). When the mode set by the key input process is the fifth mode (N in step S14
O), the fifth mode copy process is executed (step S).
600). After the above-described predetermined copy processing is executed, the processing ends.

<3-2> Description of Key Input Processing FIG. 10 shows the key input processing shown in FIG. 9 (step S10).
It is a processing flowchart of 0). If the select key 67 on the operation panel shown in FIG. 4 is pressed by the user (YES in step S101) and the LED 72 is lit (YES in step S102), LE is selected.
D72 is turned off and the LED 68 is turned on (step S103). Then, the first mode is set (step S104). If the LED 68 is turned on (YES in step S105), the LED 68 is turned off and the LED 69 is turned on (step S10).
6). Then, the second mode is set (step S10).
7). If the LED 69 is turned on (YES in step S108), the LED 69 is turned off and L
The ED 70 is turned on (step S109). And the third
The mode is set (step S110). Also LED
If 70 is turned on (Y in step S111)
ES), the LED 70 is turned off and the LED 71 is turned on (step S112). Then, the fourth mode is set (step S113). Furthermore, when the LED 71 is turned on (NO in step S111), L
The ED 71 is turned off and the LED 72 is turned on (step S114). Then, the fifth mode is set (step S115). After each of the above processes, after performing other key input processes such as the number of copies and copy density (step S
116), and return.

The copy processing in the first to fifth modes will be described below in detail. In the description, the first copy sheet conveyance means that the copy sheet is conveyed from the sheet feeding cassette 9 to the platen glass 1a. The second copy sheet conveyance means that the reversing unit 15 reverses the copy sheet copied on one side and conveys it again to the rotary drum 10. The surface image forming processing means copying the surface of the original document onto a copy sheet. The back side image forming process means copying the back side of the original sheet onto a copy sheet. <3-3> Description of First Mode Copy Process FIG. 11 shows the first mode copy process (step S200).
It is a flowchart of. In the first mode copy process,
When the document sheets set in the automatic transport device 16 include both the double-sided document, the one-sided document, and the blank document, the one-sided copy is executed for the both-sided document and the one-sided document. The copying machine of this embodiment includes the image detection sensors 21 and 22, and can accurately determine the type of each original sheet set in the automatic transport device 16. This is used in the first mode copy processing, and for a blank side of a single-sided original and a blank original,
It is characterized in that the reading operation itself of the original image by the image scanner 1b is canceled.

The operation panel 5 shown in FIG. 4 by the user.
When the start key 66 above 4 is pressed (step S
If YES in 201), the set original document sheet is conveyed by the automatic conveying device 16 to a predetermined position on the original platen glass 1a. At this time, the front-side image detection sensor 21 and the back-side image detection sensor 22 determine the type of document paper (step S203). Here, if the transported original sheet is a double-sided original sheet, first, the back side of the original sheet is set on the original platen glass 1a (step S202). Step 20
5, the copy paper is conveyed from the paper feed cassette 9 shown in FIG. 1 and wound around the rotary drum 10 (hereinafter, the copy paper is conveyed from the paper feed cassette 9 to the platen glass 1a. Transport.). After the manuscript paper is set at a predetermined position on the manuscript table glass 1a in step 205, a well-known copying process (hereinafter, an operation of copying the back side of the manuscript paper is referred to as back side image forming process) is executed (step S206). The copy paper on which the image on the back side of the original paper is copied is discharged (step S207). Next, the reversing / paper discharge switching tab 35 provided in the automatic transporting device 16 is switched to reverse the original paper, and the front surface of the original paper is set at a predetermined position of the original glass 1a (step S20).
8). The first copy sheet conveyance is executed (step S20
9) A well-known copying process (hereinafter, an operation of copying the surface of the original sheet is referred to as a surface image forming process) is executed (step S210). Next, the printed one-sided copy of the front side image of the document sheet is discharged (step S211). Step S
If the copy is not finished yet after the original paper is ejected in 212 (NO in step S220), the process returns to step S202. On the other hand, when the copying is completed (step S
If YES in 220), the first mode copy processing is terminated and the process returns to the main routine.

If it is determined in step S203 that the conveyed document sheet is a one-sided document, step S213.
In the above, the front side and the back side of the original sheet on which the image is printed are determined based on the detection results of the front side image detection sensor 21 and the back side image detection sensor 22. In the case of the original paper printed on the front surface, the original surface is conveyed to a predetermined position on the original platen glass 1a (step S214), the first copy paper conveyance is executed (step S215), and the front surface image forming process is executed (step S215). Step S216). In the case of the original sheet printed on the back side, the back side of the original is conveyed to a predetermined position on the original platen glass 1a (step S217), the first copy sheet conveyance is executed (step S218), and the back side image forming process is executed. (Step S219). In step S211, the one-sided copy generated by the front side image forming process or the back side image forming process is discharged. If the copy is not completed after ejecting the document sheet in step S212 (NO in step S220), the process returns to step S202. On the other hand, when the copy is completed (YES in step S220), the first mode copy process is completed and the process returns to the main routine.

If the conveyed original sheet is a blank original sheet in step S203, the original sheet is ejected as it is without executing other copying operation (step S212). If the copying is not completed (NO in step S220), the process returns to step S202. On the other hand, when the copying is completed (step S220)
If YES), the first mode copy processing is ended, and the process returns to the main routine.

<3-4> Description of Second Mode Copy Process FIG. 12 shows the second mode copy process (step S300).
It is a flowchart of. In the second mode copy processing, the type of original paper set in the automatic transport device 16 is determined, and copying according to each original paper is executed. The copying machine of the present invention includes the image detection sensors 21 and 22 and can accurately determine the type of each original sheet set in the automatic transport device 16. This is utilized in the second mode copy processing, and it is characterized in that the reading operation itself of the blank surface of the single-sided original and the blank original by the image scanner 1b is canceled for the blank original.

The operation panel 54 shown in FIG. 4 by the user.
When the upper start key 66 is pressed (step S3
If YES in 01), the set original document sheet is conveyed to a predetermined position on the original platen glass 1a by the automatic conveying device 16. At this time, the front image detection sensor 21 and the back image detection sensor 22 determine the type of original paper (step S303). Here, if the conveyed original sheet is a double-sided original sheet, first, the back side of the original sheet is set on the original platen glass 1a (step S304). The first copy sheet conveyance is executed (step S305). Next, back surface image formation processing is executed (step S306). Next, the one-sided copy generated in step S306 is conveyed to the reversing unit 15 provided in the copying machine body (step S30).
7). Reversal / paper discharge switching tab 35 of the automatic transport device 16
To switch the document sheet, and set the front side of the document sheet at a predetermined position on the document table glass 1a (step S).
308). In step S309, the above step S30
The reversing unit 15 switches back and reverses the one-sided copy conveyed in No. 7, and re-conveys it to the rotating drum 10 (hereinafter, the reversing unit 15 inverts the one-sided copy paper and re-conveys it to the rotating drum 10). This is referred to as the second copy sheet conveyance.) Next, the surface image forming process is executed (step S310). The double-sided copy thus generated is discharged (step S311). Step S312
If the copy is not completed after ejecting the document sheet in (NO in step S220), the process returns to step S202. On the other hand, when the copying is completed (step S220)
If YES, the second mode copy process is terminated and the process returns to the main routine.

If it is determined in step S303 that the conveyed document sheet is a single-sided document, step S313.
In the above, the front side / the back side of the document sheet is discriminated from the detection results of the front side image detection sensor 21 and the back side image detection sensor 22. In the case of the original paper printed on the front surface, the front surface of the original paper is conveyed to a predetermined position on the original platen glass 1a (step S314), the first copy paper conveyance is executed (step S315), and the surface image forming process is executed. (Step S316). Further, in the case of the original sheet printed on the back side, the back side of the original sheet is conveyed to a predetermined position on the original platen glass 1a (step S317), the first copy sheet conveyance is executed (step S318), and the back side image forming process is performed. It is executed (step S319). In step S311, the one-sided copy generated by the front side image forming process or the back side image forming process is discharged. When the copy is not completed after the original paper is ejected in step S312 (step S320)
NO), the process returns to step S302. On the other hand, when the copying is completed (YES in step S320), the second mode copying process is completed and the process returns to the main routine.

If the conveyed original sheet is a blank original sheet in step S303, the original sheet is ejected as it is without executing other copying operation (step S312). If the copying is not completed (NO in step S320), the process returns to step S302. On the other hand, when the copying is completed (step S320)
And YES), the second mode copy processing ends, and the process returns to the main routine.

<3-5> Description of Third Mode Copy Process FIGS. 13 and 14 are flowcharts of the third mode copy process. FIG. 13 shows a flowchart mainly related to the case where the document image set in the automatic transport device 16 is a double-sided document, and FIG. 14 is a document sheet set in the automatic transport device 16 is a single-sided document. The flowchart mainly relates to the case. In the third mode copy processing, when the original sheets set on the automatic transport device 16 are both double-sided originals and single-sided originals and the original sheets transported by the automatic transport device 16 are single-sided originals, After printing the image of the single-sided original on the front side of the copy sheet, copy the image printed on the front side of the next original sheet (however, if it is a single-sided original printed only on the back side, the image on the back side) to the copy sheet. Print on the back side of the, then pad the image to create a two-sided copy. The copying machine according to the present invention includes an image detection sensor 21.
And 22 are provided, it is possible to accurately determine the type of each original sheet set in the automatic transport device 16. In the third mode copy processing, this is utilized, and the operation of reading the blank surface of the single-sided original and the blank original by the image scanner 1b is stopped.

The operation panel 54 shown in FIG. 4 by the user.
When the upper start key 66 is pressed (step S4
If YES in 01), the document sheet set in the automatic transport device 16 is transported to a predetermined position on the document glass 1a (step S402). At this time, the front surface image detection sensor 2
The type of the document sheet is determined by the 1 and the backside image detection sensor 22 (step S403). Step S403
In, if the transported original paper is a double-sided original,
The following processing is executed. First, the back surface of the original is set on the original glass 1a (step S404). It is checked whether or not there is a copy sheet copied on one side in the reversing unit 15 (step S405). Here, when the copy sheet copied on one side is not held in the reversing unit 15, first, the first copy sheet conveyance is executed (step S40).
6). Next, back surface image formation processing is executed (step S40).
7). Next, the reversing unit 15 provided in the copying machine body
Then, the copy sheet copied on one side in step S407 is conveyed (step S408). The reverse / paper discharge switching tab 35 of the automatic transport device 16 is switched to reverse the original paper, and the front surface of the original paper is set at a predetermined position on the original platen glass 1a (step S409). Step S31
At 0, the second copy sheet conveyance is executed. Here, the reversing unit 15 switches back and reverses the one-sided copy conveyed in step S408, and re-conveys it to the rotary drum 10. Next, the surface image forming process is executed (step S411). The double-sided copy thus generated is discharged (step S412). If the copy is not completed after ejecting the original sheet in step S413 (NO in step S414), the process returns to step S402.
On the other hand, when copying is completed (YES in step S414)
S), the third mode copy process is terminated, and the process returns to the main routine. On the other hand, in step S405,
When the copy sheet copied on one side is held in the reversing unit 15, first, the second copy sheet conveyance is executed (step S415). Next, the surface image forming process is executed (step S416). As a result, a copy sheet copied on both sides is generated and discharged (step S417). Next, in order to copy the original image on the remaining surface, the automatic transport device 1
The reverse / paper discharge switching tab 35 of 6 is switched to reverse the original paper, and the front surface of the original paper is set at a predetermined position on the original glass 1a (step S418). Next, the first copy sheet conveyance is executed (step S419). Surface image formation processing is executed (step S420). The original paper is ejected (step S421). If the copy is not completed (NO in step S422), the one-sided copy generated in step S420 is conveyed to the reversing unit 15 and held therein (step S424), and step S424.
Return to 402. However, if the original sheet ejected in step S420 is the final sheet, that is, if copying is completed (YES in step S422), then step S4 is performed.
After discharging the one-sided copy generated in step 20 (step S4
23) and returns to the main routine. If the document sheet conveyed in step S403 is a blank document,
The original sheet is discharged as it is without executing the copying operation or the like (step S413). If the copy is not completed after the original paper is ejected in step S413 (step S413).
(No in 414), the process returns to step S402. on the other hand,
When the copying is completed (YES in step S414),
The third mode copy process is terminated and the process returns to the main routine. When the document sheet conveyed in step S403 is a single-sided document, the following process is executed as shown in FIG. First, it is determined whether the document is printed on the front side or the back side (step S425). Here, in the case of the original paper printed on the front surface, the original platen glass 1a
Set the front side of the original paper at the predetermined position (step S
426). It is determined whether the one-sided copy is held in the reversing unit 15 (step S427). here,
When the one-sided copy is not held in the reversing unit, the steps after "D" shown in FIG. 13, that is, step S41.
The processing after 9 is executed (step S451). Also,
When the one-sided copy is held in the reversing unit 15, the steps after "F" shown in FIG. 13, that is, the processing after step S410 are executed (step S453).
If the original is the one-sided original printed on the back side in step S425, the back side of the original sheet is set at a predetermined position on the original platen glass 1a (step S428). It is determined whether the one-sided copy is held in the reversing unit 15 (step S429). When the one-sided copy is not held in the reversing unit 15, the first copy sheet conveyance is executed (step SS430), and the back side image forming process is executed (step S431). After this, the steps after "E" shown in FIG. 13, that is, the processings after step S421 are executed (step S452). If the single-sided copy is held in the reversing unit 15, the second copy sheet conveyance is executed (step S432), and the back side image forming process is executed (step S433). After this, the steps after "G" shown in FIG. 13, that is, the processing after step S412 are executed (step S454).

<3-6> Description of Fourth Mode Copy Process FIG. 15 is a flowchart of the fourth mode copy process. In the fourth mode copy processing, when the original sheet is a single-sided original, normal single-sided copying is executed, and when the original sheet is a double-sided original, both front and back images of the original sheet are simultaneously printed on the front side of the copy sheet 2in1 Perform a copy.
For 2in1 copy, as shown in FIG.
When the double-sided document of No. 4 is set in the automatic transport device 16,
The image A on the front surface is multiplied by 0.707, and an image obtained by rotating this by 90 degrees is printed on the left half of an A4 size copy sheet. Next, the image on the back side is multiplied by 0.707, and the image B rotated by 90 degrees is printed on the right half of the remaining copy sheet.
The copying machine of the present invention includes the image detection sensors 21 and 22 and can accurately determine the type of each original sheet set in the automatic transport device 16. In the fourth mode copy processing, this is used to cancel the reading operation of the blank surface of the blank original by the image scanner 1b.

The operation panel 5 shown in FIG. 4 by the user.
When the start key 66 above 4 is pressed (step S
501), the automatic conveyance device 16 conveys the set original document to a predetermined position on the original platen glass 1a (step S502). At this time, the front-side image detection sensor 21 and the back-side image detection sensor 22 determine the type of document paper (step S503). If the transported original paper is a double-sided original, first, place the original back glass 1 on the back surface of the original paper.
It is conveyed to a predetermined position of a (step S504). First
Copy paper conveyance is executed (step S505). next,
The image on the back side of the original sheet is multiplied by 0.707, rotated by 90 degrees, and then an image forming process is performed to print on the half position of the copy sheet conveyed from the sheet feeding cassette 9 (step S).
506). Further, the reversing / paper discharge switching tab 35 provided in the automatic conveying device 16 is switched to reverse the original sheet and convey it to a predetermined position on the original platen glass 1a (step S5
07). The image on the surface of the transported original document is x 0.707
After doubling and rotating by 90 degrees, an image forming process for printing at the position of the remaining half of the copy paper is executed (step S50).
8). After ejecting the 2 in 1 copy generated by the above processing (step S509), the original paper is ejected (step S510). When the copy is completed (YES in step S518), the fourth mode copy process is ended and the process returns to the main routine. If the copying is not completed (NO in step S518), the process returns to step S502. In the step S503, if the conveyed original sheet is a single-sided original sheet,
In step S511, it is determined from the detection results of the front surface image detection sensor 21 and the back surface image detection sensor 22 whether the front side or the back side is the original sheet printed. In the case of the original paper printed on the front surface, the front surface of the original paper is conveyed to a predetermined position on the original platen glass 1a (step S512), the first copy paper conveyance is executed (step S513), and the surface image forming process is executed. (Step S514). Further, in the case of the manuscript paper printed on the back side, the back side of the manuscript paper is conveyed to a predetermined position on the manuscript glass 1a (step S515), the first copy paper conveyance is executed (step S516), and the back side image forming process is performed. It is executed (step S517). Step S5
At 09, the one-sided copy generated by the front side image forming processing or the back side image forming processing is discharged. After the original paper is ejected in step S510 and the copying is not completed (NO in step S518), the process returns to step S502. On the other hand, when copying is completed (step S5)
(YES in 18), the fourth mode copy processing ends, and the process returns to the main routine.

In step S503, if the conveyed original sheet is a blank original sheet, the original sheet is discharged as it is without executing other copying operation (step S510). If the copying is not completed yet (NO in step S518), the above step S502 is performed.
Return to. On the other hand, when copying is completed (step S51)
If YES in step 8), the second mode copy process ends, and the process returns to the main routine.

<3-7> Description of Fifth Mode Copying Process FIG. 17 is a flowchart of the fifth mode copying process. In the fifth mode copy processing, the type of the first original paper set in the automatic transport device 16 is determined. If the original paper is a single-sided original, the first mode copy processing is executed and the original paper is In the case of a double-sided original, the third mode copy process is executed. When the user presses the start key 66 on the operation panel 54 shown in FIG. 4 (YES in step S601), the first original sheet set in the automatic transport device 16 is the predetermined original sheet of the original platen glass 1a. Is transported to the position (step S602). At this time, the type of the document image is determined based on the detection results of the front surface image detection sensor 21 and the back surface image detection sensor 22 included in the automatic transport device 16 (step S603). Here, when the document sheet is a single-sided document, the steps after "A" shown in FIG. 11, that is, the processes after step S202 are executed. In addition, when the original paper is a double-sided original, as shown in FIG.
The steps from B "onward, that is, the processes from step S404 onward are executed. Further, when the original document is a blank document, the original document is ejected (step S604), the copy operation is stopped (step S605), and the main routine is executed. To return.

As described above, in the copying machine of the present invention, the automatic conveyance device 16 is provided with the front surface image detection sensor 21 and the rear surface image detection sensor 22, and the type of the set original paper (double-sided original, single-sided original, blank original). Can be accurately determined. Therefore, it is possible to eliminate a wasteful operation of a conventional copying machine, such as reading a blank surface and printing it.

[0046]

According to the copying machine of the present invention, it is possible to eliminate the unnecessary copying operation on the blank side of the original sheet.

In the copying machine according to the second aspect, the manuscript paper set on the conveying means is a manuscript paper printed on both sides, a manuscript paper printed on one side, or a blank manuscript paper. However, all of them can be copied and printed on one side of the copy paper. Further, similarly to the copying machine according to the first aspect, the control means can eliminate the unnecessary copying operation on the blank surface of the original sheet based on the determination result by the determination means.

According to a third aspect of the present invention, there is provided a copying machine, in which the original paper set on the conveying means is printed on both sides,
Original paper printed on one side or original paper printed on both sides and original paper printed on one side without performing copy operation on the blank side even if mixed with blank original paper Can be copied and output on a copy sheet that can be used as it is. Further, similarly to the copying machine according to the first aspect, the control means can eliminate the unnecessary copying operation on the blank surface of the original sheet based on the determination result by the determination means.

In the copying machine according to the fourth aspect, the manuscript paper set on the conveying means is a manuscript paper printed on both sides, a manuscript paper printed on one side, or a blank manuscript paper. However, it is possible to output the printed surface excluding the blank surface from all of them on both sides of the copy paper in order. Further, similarly to the copying machine according to the first aspect, the control means can eliminate the unnecessary copying operation on the blank surface of the original sheet based on the determination result by the determination means.

In the copying machine according to the fifth aspect, the manuscript paper set on the conveying means is a manuscript paper printed on both sides, a manuscript paper printed on one side, or a blank manuscript paper. However, except for blank manuscript paper,
The original paper printed on both sides can be reduced, arranged side by side on one side of the copy paper, copied, and output. Further, similarly to the copying machine according to the first aspect, the control means can eliminate the unnecessary copying operation on the blank surface of the original sheet based on the determination result by the determination means.

In the copying machine according to the sixth aspect, when the first original sheet set on the conveying means is the original sheet printed on both sides, the original sheet after the original sheet is not printed. Only the side with the copy is automatically copied to both sides of the copy paper. Further, when the first sheet of the original sheet set on the conveying means is an image in which only one side is printed, only the printed side of the original sheet after the original sheet is automatically automatically transferred to one side of the copy sheet. Make a copy. Further, when the first original sheet set on the conveying means is a blank sheet, the copying operation is automatically stopped. In this way, even if the user does not select and set the copying operation, double-sided copying, single-sided copying, and copying stop are automatically executed from the type of the first original sheet. Further, similarly to the copying machine according to the first aspect, the control means can eliminate the unnecessary copying operation on the blank surface of the original sheet based on the determination result by the determination means.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a copying machine of the present invention.

FIG. 2 is a schematic cross-sectional view of an automatic transfer device 16.

FIG. 3 is a system diagram of the copying machine of the present invention.

FIG. 4 is a diagram showing a front view of an operation panel.

FIG. 5 is a diagram schematically illustrating copying in a first mode.

FIG. 6 is a diagram schematically illustrating copying in a second mode.

FIG. 7 is a diagram schematically illustrating copying in a third mode.

FIG. 8 is a diagram schematically illustrating copying in a fourth mode.

FIG. 9 is a flowchart of a main routine of copy processing executed by the control unit 51 of the copying machine main body.

FIG. 10 is a processing flowchart of key input processing.

FIG. 11 is a flowchart of first mode copy processing.

FIG. 12 is a flowchart of second mode copy processing.

FIG. 13 is a processing flowchart for a double-sided original and a blank original in the third mode copy processing.

FIG. 14 is a diagram showing a processing flowchart for a single-sided original in the third mode copy processing.

FIG. 15 is a diagram showing a flowchart of fourth mode copy processing.

FIG. 16 is a diagram schematically illustrating a 2 in 1 copy executed in the copy in the fourth mode.

FIG. 17 is a diagram showing a flowchart of fifth mode copy processing.

[Explanation of symbols]

 15 ... Reversing unit 16 ... Automatic transporting device 21 ... Front side image detecting sensor 22 ... Back side image detecting sensor 35 ... Reversing / sheet discharge switching tab

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Ito Inventor Hideo Ito 2-3-13 Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Katsumasa Hayashi Azuchi, Chuo-ku, Osaka-shi, Osaka 2-13-3 Machi Osaka International Building Minolta Camera Co., Ltd.

Claims (6)

[Claims] 1. An execution unit for copying an original image on one side and / or both sides of a copy sheet, a detection unit for detecting the presence or absence of a blank side on both sides of the original sheet, and a detection result of the detection unit. , A determination means for determining whether the original paper is printed on both sides, the original paper is printed on only one side, or both sides are blank, and based on the determination result of the determination means, The control means includes control means for controlling the executing means to execute a uniform copying operation on one side and / or both sides, and a discharging means for discharging the copied copy paper. Is a copying machine characterized by canceling the copying operation itself by the executing means. 2. The copying machine according to claim 1, wherein the executing means conveys the original sheet to a predetermined position on the original platen glass, and reverses the original sheet on the original platen glass. Then, it comprises reversing means for transporting the document sheet to the predetermined position on the platen glass again, and copying means for copying the image of the document sheet on the platen glass onto the copy sheet. When it is determined that the original sheet is a printed original sheet, the copying unit copies the front side of the original sheet to the copy sheet, and the reversing section inverts the original sheet, and the copying section reverses the original sheet to another copy sheet. When the first control for making a copy on the first side and the determining means determines that the original paper is printed on only one side, and the surface of the original paper is printed, the surface of the original paper is copied by the copying means. Let the manuscript When the back side of the paper is printed, the copying operation is not performed on the front side of the blank sheet, the original paper is inverted by the inversion means, and only the back side of the original paper printed is copied by the copy means. A copying machine, characterized in that, when the judging means judges that the document paper is blank on both sides, it executes a third control for canceling the copying operation for the document paper. 3. The copying machine according to claim 1, wherein the executing means conveys the original sheet to a predetermined position on the original platen glass, and reverses the original sheet on the original platen glass. Then, the original document reversing unit that conveys the document sheet to the predetermined position on the original platen glass again, the copying unit that copies the image of the original document sheet on the original platen glass onto the copy sheet, and the copy sheet that is copied by the copying unit are reversed. When the determination means determines that the original paper is printed on both sides, the control means copies the surface of the original paper by the copying means, and then the original paper is inverted by the original inversion means. First, the copying paper reversing means reverses the copying paper, and the copying means reverses the back surface of the original paper to the reversed copying paper.
When the control and determination means determines that the original paper is printed on only one side and printing is performed on the front surface of the original paper, the copying means copies the surface of the original paper, and the original When the back side of the sheet is printed, the copying operation is not performed on the front side of the blank sheet, the original sheet is inverted by the original inverting section, and the reverse side of the inverted original sheet is copied by the copying section. A copying machine, characterized in that, when the means determines that the both sides are blank original sheets, a third control for canceling the copying operation for the original sheets is executed. 4. The copying machine according to claim 1, wherein the executing means conveys the original sheet to a predetermined position on the original platen glass, and reverses the original sheet on the original platen glass. Then, the original document reversing unit that conveys the document sheet to the predetermined position on the original platen glass again, the copying unit that copies the image of the original document sheet on the original platen glass onto the copy sheet, and the copy sheet that is copied by the copying unit are reversed. When the determination unit determines that the original sheet is double-sided printed, the control unit copies the surface of the original sheet by the copying unit and then reverses the original sheet by the original sheet inverting unit. Then, the copying paper reversing means reverses the copying paper, and the copying means copies the reverse side of the original paper to the reversed copying paper. The discriminating means judges that the original paper is printed on only one side. In this case, after copying the printing surface of the manuscript paper by the copying means, waiting for another manuscript paper other than the manuscript paper whose both sides are blank to be conveyed on the manuscript table glass by the conveying means, and then the copying paper reversing means. When the copy means reverses the copy paper and the copy means copies the print surface of the other original paper onto the inverted copy paper, and the judging means judges that the both sides are blank paper. Is a copying machine characterized by executing a third control for canceling the copying operation for the document sheet. 5. The copying machine according to claim 1, wherein the executing means conveys the original sheet to a predetermined position on the original platen glass, and reverses the original sheet on the original platen glass. Then, it comprises reversing means for conveying again to a predetermined position on the platen glass and copying means for copying the image of the original sheet on the platen glass at a predetermined magnification to a predetermined position on the copy sheet. The means reduces the image on the front surface of the original paper by the copying means when the determination means determines that the original paper is double-sided printed,
After the reduced front side image is copied to a half area of the copy sheet, the original sheet is inverted by the reversing means, the back side image is reduced by the copying means, and the reduced back side image is copied to the same copy sheet. The first control for copying in the other half of the area and the case where the discriminating means discriminates that the manuscript paper is printed on only one side, and when the front side of the manuscript paper is printed, the copying means is used as it is. When a copy is made and the back side of the original paper is printed, the copying operation is not performed on the front side of the blank paper, and the original paper is inverted by the inversion means, so that only one side of the printed original paper is copied. The second control for making a copy by means of the third control, and when the discriminating means discriminates that the manuscript paper is blank on both sides, the copying operation for the manuscript paper is canceled.
A copying machine characterized by executing control and control. 6. The copying machine according to claim 1, wherein the executing means conveys the original sheet to a predetermined position on the original platen glass, and reverses the original sheet on the original platen glass. Then, the original document reversing unit that conveys the document sheet to the predetermined position on the original platen glass again, the copying unit that copies the image of the original document sheet on the original platen glass onto the copy sheet, and the copy sheet that is copied by the copying unit are reversed. When the discriminating unit discriminates that the first sheet is a manuscript sheet printed on both sides, the control unit sequentially copies only the printed side of the following manuscript sheets. When the first control for copying on both sides of the sheet and the determining unit determines that the first sheet is the original sheet on which only one side is printed, only the printed side of the following original sheets is sequentially copied. Second control to copy on the surface , Determining means, when the first sheet is determined to be a blank document sheet, copier and executes the third control to cancel the copy operation by the copying means.