JPS60138532A - Copying method - Google Patents

Abstract

PURPOSE:To simplify operation without dividing an original into two by a detecting means specially by allowing a light source to start at the same reference position of two division original surfaces and setting the distance of scanning movement for illuminating the respective original surfaces according to the length of copy paper. CONSTITUTION:The light source 34 and a photodetecting element 35 which correspond to the length of the copy paper are shielded by a light shielding member 32 and the length L of the copy paper is detected by them. When copy paper with different length is used, the light source and photodetecting element which correspond to the length of the copy paper are shielded and the length of the copy paper is detected. Consequently, when a book bound at the left sides is copied, this is considered to consists of the 1st original part X and the 2nd original part Y. The scanner and light source of an optical system move from their home positions to illuminate original surfaces, but pages are lighted in increasing order without fail so as to put pages of sheets of copy paper in the order of original pages. Consequently, the original need not be divided into two by the special detecting means and the simplicity of operation and the accuracy of two-position setting are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention divides a 1M document surface into two document surface parts, each of which is illuminated by a light source that scans and moves with respect to the document. The present invention relates to a copying method for copying images of side portions onto separate copy sheets.

In order to make it easier to organize the copy paper after copying has been completed, or to make it easier to carry, the manuscript surface is divided into two parts, and each part is placed on separate copy paper or on the same copy paper. Copying methods of the above type, in which copies are made on the front and back sides of copy paper, have been known in the art.

An example of a conventional copying method of this type will be explained with reference to FIG. In FIG. 1, an original 2 is placed on an original placing table made of contact glass 1. As shown in FIG.

A light source 3 is arranged below it. During copy operation,
The surface of the document 2 is divided into a first JJK document surface portion The light source 3 is scanned and moved in the direction of the arrow S to the reference position to illuminate the first document surface portion X, and then the light source 3 is moved in the same direction from the second reference position to the final end position shown by the two-dot chain line. Then, the second document surface portion Y is illuminated, thereby copying the images of each document surface portion X and Y onto separate copy sheets. In this case, the boundary position Q between both document surface portions x and y is the length Z of the document 2.
Therefore, the second reference position at which the light source 3 starts illuminating the second document surface portion Y also varies depending on the length Z of the document 2. For this reason, conventionally, a detection means (not shown) for detecting the boundary position is provided, and the detection means is manually brought to the boundary position Q each time according to the length Z of the document. 2 reference positions were set.

However, manually activating the detection means each time not only complicates the operation, but also makes it difficult to correctly bring the detection means to the boundary position and correctly set the second reference position.

1. The object of the invention is to provide a copying method of the type mentioned at the outset, which eliminates the above-mentioned conventional drawbacks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained below based on illustrated embodiments.

First, a basic configuration example of the present invention will be briefly explained based on FIG.

In the configuration according to the present invention, the light source 3 is located at the same reference position, for example, as shown in FIG. The operation starts from the home position shown in , and the operation start position, that is, the reference position is fixed to one. Furthermore, the scanning distance that the light source 3 moves when illuminating each document surface portion X or Y is not the length Z of the document 2;
It is determined by the length of the copy paper on which the images of each document surface portion X and Y are copied.

For example, when first illuminating the first document surface portion X and then illuminating the second document surface portion Y, the length of the copy paper on which these images will be copied is detected in advance, and the light source 3 is actuated in the direction of arrow S from the base position It (home position) shown by the solid line, and from when the effective illumination start position (dotted line position) where the first document surface portion X can be illuminated with effective light is reached, It is scanned and moved in the direction of arrow S by a distance corresponding to the length of the copy paper, and brought to an intermediate position shown by a chain line. Thereafter, the light source 3 is further operated in the direction of arrow S by a distance corresponding to the length of the copy paper detected in advance in the same manner, until it reaches the final end position shown by the two-dot chain line, and during that time; Illuminate Y.

Also, when first illuminating the second document surface portion Y, then illuminating the first document surface portion X, and copying each image, the light source 3 is operated in the direction of the arrow S from its reference position (home position). When this reaches the effective illumination start position shown by the dashed line, effective light starts to be irradiated onto the second document surface portion Y.

In this case as well, the light source 3 is scanned and moved by a distance corresponding to the length of the copy paper from the effective illumination start position to the final end position shown by the two-dot chain line, during which time the second document surface portion Y is illuminated. . Next, the light source 3 is returned to the reference position (home position), and the light source 3 is operated again from this reference position to illuminate the first document surface portion X. At this time, too, from the effective illumination start position shown by the broken line to the dot-dashed line The moving distance of the light source 3 to the final end position indicated by is determined according to the length of the copy paper. Furthermore, it goes without saying that the distance traveled by the light source 3 from the home position to the effective illumination start position shown by the dashed line in order to illuminate the second document surface portion Y is also determined by the length of the copy paper.

The lengths of the document surface portions X and Y in the moving direction S of the light source 3,
That is, the distance that the light source 3 moves in the direction of arrow S when illuminating each portion X and Y is the distance X of these portions X and Y.

Even if the lengths of the copy sheets on which the images of Y are copied are equal to each other or not, there is a correspondence b).

Therefore, by detecting the length of copy paper as described above and scanning and moving the light source 3 by a corresponding distance, the light source can be moved to one reference position (in this example) for any size document. Even if the scanning movement is started using the home position as a reference, the light source can be scanned and moved by a predetermined distance, and each portion X and Y can be copied without any problem. In this way, there is no need for a special detection means for detecting the boundary position of the original document, which prevents the inconvenience of inaccuracy in the position at which the light source starts operating, and simplifies the operation.

Next, a more specific configuration example of a copying machine to which the present invention is applied will be explained.

FIG. 2 shows an example of the overall configuration of a copying machine, and this copying machine operates in various copy modes including a two-page spread copy mode that is directly related to the present invention as described later. , an overview of the operations and configuration of the copier common to each copy mode will be clarified.

In FIG. 2, a document 2 (a book document in the example shown) is placed on a document table consisting of a contact glass l fixed at the top of the copying machine main body 4, and an optical system is placed below the glass l. 5 is located.

During the copying operation, the light emitted from the light source 3 of the optical system 5 illuminates the original 2, and the reflected light is transmitted to the first, second and third
Reflected by mirror 6.7.8, then passed through lens 9,
Thereafter, after being reflected by a fourth mirror IO fixed to the copying machine main body 4, the photoreceptor 11 rotatably supported by the main body 4
The exposure position 12 is reached, and the original image is projected and imaged there. The light source 3 is supported by the scanner 13 together with the first mirror 6, and by the operation of the scanner 13, the light source 3 is scanned and moved in the direction of arrow S from its home position, as will be explained in detail later. The second and third mirrors 7.8 are also supported by another scanner (not shown) and move in the same direction as the direction of movement of the light source 3.

The home position is the standby position of the scanner 13,
During the non-copying period, the home position switch 40 is turned on by the scanner 13 itself or an actuator (not shown) attached thereto. In this example, the switch is a mechanical switch, but it will be appreciated that other types of switches, such as photoelectric sensors, may also be used.

The illustrated copying machine is also configured to be able to change the magnification of the image formed on the photoreceptor, that is, the copy magnification, by operating the lens 9 and other predetermined optical elements in the direction of the optical axis of the lens. .

On the other hand, the above-mentioned photoreceptor 11 is rotated clockwise in the figure, and its surface is charged to a predetermined polarity by the charger 14a, and the photoreceptor portion thus charged is driven to rotate clockwise in the figure.
As described above, light from the original is irradiated, and an electrostatic latent image corresponding to the image of the original is formed on the photoreceptor. This latent image is made visible by toner as it passes through developer device 14.

Further, the copy paper 17 housed in the paper feed cassette 16 of the paper feed device [15] is sent out from the cassette 16 in the direction of arrow T by the paper feed roller 18. The copy paper 17 sent out in this manner is once stopped by a registration roller 19, as will be described later, and then sent to the photoreceptor 11, where it is aligned with the visible image formed on the photoreceptor.

20 is a second paper feed cassette, which is similar to the cassette 1 described above.
6 is used selectively.

A transfer charger 21 transfers the visible image on the photoreceptor to a copy paper superimposed on the photoreceptor, and then this copy paper is separated from the photoreceptor 11 by a separation charger 22. The separated copy sheets are transported by a conveyor belt 23.
It is carried to the fixing device 24.

Here, the visible image (copy image) on the copy paper is fixed. After the fixing, the copy paper is conveyed by a feed roller 25 or the like, and is finally discharged onto a paper discharge tray 26, as will be explained in detail later.

After the visible image has been transferred, the photoreceptor portion is cleaned of residual toner by a cleaning device 27, and then static electricity is eliminated by a static elimination lamp 28. An eraser 29 consisting of a lamp is provided between the exposure position 12 of the photoreceptor 11 and the charger 14a.
As will be explained in detail later, this eraser 29 eliminates static electricity from a portion of the photoreceptor where a latent image should not be formed, and prevents unnecessary toner from adhering to the photoreceptor.

Incidentally, the distance over which the light source 3 scans during operation of the copying machine described above is determined depending on the length of the copy paper 17, as is clear from the explanation related to FIG. Next, an example of a known length detection device for detecting the length of copy paper will be described.

The length sensing device 30 includes a photoelectric sensor 31, as clearly shown in FIG. 2, and particularly in FIGS. 3 and 4.

The light shielding member 32 is fixed to the aforementioned cassette 16 that accommodates the copy paper 17. The sensor 31 includes a U-shaped support 33, and an appropriate number of pairs of light sources 34 and light receiving elements 3, which are arranged opposite to each other on the upper and lower parts of the support body 33, five pairs in this example.
5, so that light from each light source 34 can enter the light receiving element 35 facing thereto.

When the cassette 16 is attached to the copying machine main body 4 as shown in FIG. 2, the light shielding member 32 attached thereto blocks the space between one or more pairs of light sources 34 and the light receiving element 35, and blocks the light from the blocked light source. The light cannot enter the light-receiving element facing it. In this case, the light shielding member 32 provided in the cassette 16 is provided at a position corresponding to the length of the copy paper 17 accommodated in the cassette (the length in the feeding direction T). For this reason, the light source and light receiving element corresponding to the length of the copy paper to be used are blocked by the light shielding member 32, thereby detecting the length of the copy paper. A cassette that accommodates copy paper of different lengths is provided with light-shielding members at positions or numbers corresponding to the lengths, and by installing this cassette 1- into the copying machine main body, the length of the copy paper can be changed. The light source and light-receiving element corresponding to the length are cut off, and the length of the copy paper is detected. In this way, five pairs of light sources 3
By using a detection device 30 having a light receiving element 35 and a light receiving element 35, and selectively blocking light between the light source and the light receiving element, it is possible to detect up to 25 types of copy paper sizes. A similar detection device 30a is also installed in the second paper feed cassette 20.
is provided.

In the illustrated embodiment, the detection devices 30 and 308 detect not only the length of the copy paper but also the copy paper size including its width; however, in the present invention, the length of the copy paper is Since the length is important, the explanation will be given assuming that the detection devices 30, 30a detect the length, except for the explanation related to FIG. 17, which will be described later.

It goes without saying that the length of the copy paper to be used may be detected using an appropriate detection device other than the above-mentioned length detection devices [30, 30a].

Next, various copy modes of the copying machine shown in FIG. 2 will be explained in detail.

FIG. 5 shows the key manual unit 36 attached to the copying machine main body 4 shown in FIG. FIG. In addition, FIGS. 8 and 9 show the optical system 5 described above.
FIG. 2 is a flowchart showing a control mode, and each copy mode will be clarified with reference to these figures and FIG. 2.

) - Niy-no-I-mo' - "Normal copy mode" does not copy the original by dividing it into two parts as shown in Figure 1, but instead copies the original by dividing it into two parts as shown in Figure 1. This is a copy mode that performs copying by scanning the illumination at once.

First, the print key 37 of the key manual section 36 shown in FIG.
Turn on (Figure 6 A). As a result, the previously described charging, transfer 1 separation charger 14a, 21° 22, static elimination lamp 28
, eraser 29, developing device 14, cleaning device 27
, the photoreceptor 11, etc. are operated, and the pea preparation control is executed (FIG. 6A).

Next, the aforementioned paper feed roller 18 is turned on (Fig. 6).
The copy paper 17 loaded in the paper feed cassette 16 is fed toward the registration roller 19, and when its tip turns on the first paper sensor 38 provided near the roller 19 (the sixth The signal generated by this causes the paper feed roller 18 to stop (see FIG. 6), and the copy paper 17 comes to rest with its leading edge held by the registration roller 19.

Next, in synchronization with the rotation timing of the photoreceptor 11, a registration start signal is generated in a manner described later (sixth
Then, the registration roller 19 starts rotating (Fig. 6), and the copy paper 17 is fed toward the photoreceptor 11.

On the other hand, in the optical system 5, the scanner 13, which had stopped at the home position (reference position) shown by the solid line in FIG.
The light source 3 begins to move in the direction of the arrow S by the operation of a stenciling motor (not shown), and reaches the effective illumination start position shown by the broken line (that is, the position where it starts to irradiate the surface of the document 2 with effective light), Continue scanning in the direction of arrow S,
At this time, the surface of the document is illuminated as described above, and a latent image is formed on the photoreceptor 11. When the scanner 13 and the light source 3 reach their final positions, the stepping motor reverses, and they again move back toward the home position in the opposite direction of the arrow S. Note that in this example, original 2 is copied in normal copy mode.
Therefore, the final end position of the light source 3 is the position shown by the two-dot chain line.

Even while the light source 3 reaches the effective illumination start position shown by the broken line from the home position, the photoreceptor 11 rotates and its surface is charged by the charger 14a. Therefore, if this is left unattended, toner will adhere to portions of the photoreceptor in which a latent image should not be formed in the developing device 1. Therefore, as described above, in the copy preparation control (FIG. 6A), the eraser 29 is turned on to eliminate static from the portion of the photoreceptor where no latent image is formed. Then, when the light source 3 reaches the effective illumination start position, or just before or after that, the eraser 29 is turned off so that a latent image can be formed on the photoreceptor portion after -1 without any trouble. Further, when the light source 3 reaches the final end position and starts a return movement from there toward the home position, or just before or after that, the eraser 29 is turned on to eliminate static from the photoreceptor portion where no latent image is formed. In order to simplify the explanation, in this example, when the light source 3 reaches the effective illumination start position, the eraser 29 turns off, and similarly, when the light source 3 reaches the final end position and starts the return movement at the same time. It is assumed that the eraser 29 is turned on. The same applies to copy modes other than normal copy mode, except in special cases. However, as will be described later, the actual positions of the effective illumination start position and final end position of the light source 3 may differ depending on each copy mode.

The operation start timing of the scanner 13 and the light source 3, the distance they move, and the ON/OFF control of the eraser 29 are performed as follows, as shown in FIGS. 8 and 9.

First, before the light source 3 starts scanning, the steps shown in FIGS.
The length of the copy paper 17 is detected by the length detecting device 30 shown in the figure, and this length data is transferred to the accumulator AC of the microcomputer (FIG. 8a).
Scan data to be explained next is calculated (Fig. 8b)
. There are the following three types of scan data, and these are stored in registers R1, R2, and R3, respectively.

(1) Scan data stored in register R1; The scanner 13 starts operating from the home position together with the light source 3, and after the above-mentioned home position switch 40 is turned off, the light source reaches the effective illumination start position, Time data until the eraser 29 is sub-flashed.

(2) Scan data stored in register R2; After the light source 3 and the scanner 13 start operating from the home position, and the home position switch 40 is turned off, until the registration star 1-(8) as described above occurs. time data.

(3) Scan data stored in register R3; Time data from when the scanner 13 and light source 3 start operating from the home position and the home position switch 40 is turned off until the light source reaches its final position.

The above three scan data changes depending on the length L of the copy paper 17, that is, the length data detected by the length detection device 30, and also changes depending on the selected copy mode.

In the normal copy mode, "scan Z" shown in C of FIGS. 8 and 9 is executed based on the above-mentioned scan data. The scan data Zl, Z2 . shown in d of FIG. Z3 is the scan data of (1) to (3) described above in the normal copy mode. In this case, each scan data is stored in advance in the key human power section 3.
By pressing any one of the magnification keys 39 6 (FIG. 5), the image is converted into a value corresponding to the designated magnification ratio (FIG. 9e). This is because even if the length L of the copy paper 17 is the same, the distance over which the light source 3 scans varies depending on the copy magnification, so it is necessary to correct the scan data accordingly. It is also possible to calculate the scan data in advance by taking the copy magnification into consideration. Then, as explained earlier,
Light source 3 and eraser 29 are turned on, that is, lighted, and light source 3
At the same time, the scanner 13 starts from the home position (FIG. 9f). As a result, the photoreceptor 11 begins to be exposed to light, and as described above, the portion of the photoreceptor where no latent image is formed is charged by the eraser 29. When the scanner 13 starts operating from the Baum position, the home position switch 40 is turned off and the start of operation of the light source 3 is detected (FIG. 9g). That is, by turning off this switch 40, the pulse counter is cleared and started (Fig. 9h), and when the number of pulse counters from 1 to 1 matches the scan data Z1 stored in the register R1 (Fig. 9i), the eraser is activated. 29 is turned off (Fig. 9j). At this time, the light source 3 has reached the effective illumination start position shown by the broken line in FIG. 2, and at this point the leading edge position of the latent image formed on the photoreceptor is determined. After that, when the count number of the pulse counter matches the scan data Z2 stored in the register R2 (Fig. 9k), the registration start signal described earlier is generated.
) As a result, the registration rollers 19 begin to rotate as described above, and the copy paper 17 is fed toward the photoreceptor 11.

The scanner 13 continues to scan in the direction of the arrow S together with the light source 3, and when the count number of the pulse counter matches the scan data Z3 (Fig. 9m), that is, the light source reaches the final end position shown by the two-dot chain line. At this time, as described above, the light source is turned off (FIG. 9 n), the eraser 29 is turned on (FIG. 9 0), and the scanner 13 and light source 3 move back toward the home position ( 9th
Figure P). When the light source 3 reaches the home position, the home position switch 40 described above is turned on (Fig. 9q),
As a result, the scanner 13 stops (FIG. 9r) and waits for the next start signal. This scanning operation is repeated a predetermined number of times (this number is referred to as CNT St) by pressing the numeric keypad 41 of the key manual section 36.

As described above, when the scanner 13 and the light source 3 reach the effective illumination start position and the final end position by the operation of the home position switch 40, a predetermined operation is performed, and the scanner 13
When the light source 3 returns to the home position again, the scanner 13 is stopped by operating the switch 40. In this manner, the scanner and light source operate based on their home positions.

On the other hand, the copy paper that has left the photoreceptor 11 and passed through the fixing device 24 passes through the second paper sensor 42 (Figure 2), which is turned on (Figure 6), as indicated by arrow U in Figure 2. The paper is transported while being guided by the guide plates 43 and '44.

Then, a check is made as to whether or not the mode is normal copy mode (see FIG. 6), and the copy paper passes through a third paper sensor 46 provided near the paper ejection roller 45 and is ejected to the paper ejection tray 26. The third paper sensor 46 is turned off every time the trailing edge of the copy paper passes therethrough, and counts the number of copies. If this count number (CNT S, 2) matches the specified number of repeats (CNT Sl) (Fig. 6,
8 u) and stop control (FIG. 6 c) are performed. If they do not match, the next copy sheet is fed toward the photoreceptor 11.

Note that the second reversing gate off and reversing roller off shown in FIGS. 6 and 6 will be explained when other copy modes are explained.

1 Copy mode What is double-page copy mode? As shown in Fig. 1, the original 2 on the contact glass 1 is divided into a first original surface portion X and a second original surface portion Y. This is a copy mode in which one side is illuminated for the first time and the other side is illuminated for a second time to perform a copying operation, and is also a copy mode that is directly related to the method according to the present invention. And the two-sided single-sided copy mode is
This is a mode in which the copied image obtained with the first illumination and the copied image obtained with the second illumination are copied onto separate copy sheets.The double-sided copy mode, which will be described later, copies the copied images on the front and back sides of the same copy sheet. Each means a mode of formation.

The two-page spread copy mode is set by pressing the two-page spread key 47 of the key manual section 36 shown in FIG. 5, and reset by pressing the same key again.

The two-page spread copy mode is used both when the original is a book original and when it is a sheet original, but it is often used for book originals because it divides the original into two parts. So let's consider the book manuscript.

The book manuscript consists of a left-opening book and a first book as shown in Figure 10.
It is roughly divided into right-opening books as shown in Figure 1.

Ordinary operators usually copy book manuscripts all at once, starting with the youngest pages.

In the illustrated copying machine, taking into consideration the above-mentioned fact, the book manuscript 2 is placed on the contact glass L in a facing state as shown in FIG.
with the bottom side 2b facing away from the operator and the bottom side 2b facing the operator, and place each page of the document on the first document surface portion
The structure is such that when copies are made sequentially and sequentially while turning the pages separately and on the second manuscript surface portion Y, the pages of the plurality of completed copy sheets are aligned with the pages of the book manuscript.

First, the case of copying a left-opening book will be explained.

As shown in FIGS. 2 and 12, a left-opening book original 2 is placed on the contact glass 1, and each page of the two-page spread is separated from the first original surface part X and the second original surface part X. If considered separately, the pages on the right side in the figure, that is, the second document surface portion Y, are younger than the pages on the first document surface portion X on the left. For example, if the book original 2 in the state shown in FIG. 1O is placed on the contact glass l, the second original surface portion Y will be 53 pages, and the first original surface portion X will be 54 pages.

Next, as described above, when the two-page spread key 47 of the key manual section 36 is pressed, the left-open key 48 is pressed, and the print key 37 is turned on, the paper feed roller is stopped from the copy preparation control as in the normal copy mode. The control described above is executed (FIG. 6A to E), and the copy paper waits in front of the registration roller 19 until a registration start signal is generated.

On the other hand, the scanner 13 of the optical system 5 and the light source 3 move from the home position in the direction of arrow S to illuminate the document surface. Young pages are lit first. Therefore, in this example, the second document surface portion Y is illuminated first. In this case, the scanner 13 and the light source 3 start from the home position, which is the reference position shown by the solid line, and
Pass through the position shown by the dashed-dotted line (this position is the effective illumination start position when copying a left-open document in double-page spread single-sided copy mode) where effective light can be irradiated to the original surface portion Y of the document, and from this position The document surface portion N of No. 2 is illuminated and reaches the final end position shown by the two-dot chain line.

The light source 3 returns to the home position again, but in this case as well, the eraser 29 lights up during the time when the light source 3 reaches the effective illumination start position from the home position and until the light source 3 returns from the final end position to the home position. This eliminates static electricity from the photoreceptor 11 and prevents unnecessary toner from adhering to the photoreceptor. The specific control mode is as follows.

That is, as indicated by V in FIG. 8, it is checked whether the copy mode is the two-page spread copy mode or not, and the copy paper length is detected by the length detection device 30. Then, as in the normal copy mode, the copy paper length data is transferred to the accumulator AcC (Fig. 8 W), and three scan data are calculated (Fig. 8 x), each of which is stored in registers R1 and R2. , R3. These scan data are the data (1) to (3) shown when explaining the normal copy mode, but it goes without saying that the specific numerical values are different from those in the normal copy mode.

After calculating the scan data, if the document 2 is a left-opening book (y in FIG. 8), "scan YJ" (2 in FIGS. 8 and 9) is first performed based on the above-mentioned scan data. Yl, Y2, and Y3 shown in FIG. 9aa are the above-mentioned scan data and correspond to the scan data Zl, Z2, and Z3 in the normal copy mode, respectively.Scan Y is also shown in FIG. 9e to r. The scanner 13 is executed in the same manner as scan Z as shown in .Therefore, in this case as well, the scanner 13 starts operating with the light source 3 using the home position as the reference position, and when these leave the home position, the home position switch 40 is turned off and the Figure 9g)
, the pulse counter is cleared and started (Fig. 9h)
). Then, as shown in Figure 9, until the count number of the pulse counter matches the scan data Yl stored in the register R1, that is, until the light source 3 reaches the effective illumination start position shown by the dashed line in Figure 2. eraser 29
continues to be turned on, the photoreceptor 11 continues to be neutralized by the eraser 29 during this time. When the light source 3 reaches the effective illumination start position, the eraser 29 is turned off and the position of the tip of the latent image on the photoreceptor 11 is determined. , is recessed toward the binding section of the book, so that light reflected here is difficult to reach the photoreceptor 11. Therefore, if the photoreceptor portion corresponding to this region 2C is visualized as it is, it will be colored in shape by the toner. Therefore, in this example, eraser 2
9 is turned off a little later, and the portion of the photoreceptor irradiated with the reflected light in the region 2c is also neutralized, so that no shadow is formed on the completed copied image.

Thereafter, as in the normal copy mode, when the count number of the pulse counter matches the contents of register R2, that is, scan data Y2 (Fig. 9k), a registration start signal is generated (Fig. 9 1 and 9). 6 diagram power). Next, the light source 3 reaches the final end position shown by the two-dot chain line, and the count number of the pulse counter is changed to the register R3.
In accordance with the content Y3 (Fig. 9 m), the illumination for the second document surface portion Y is terminated (Fig. 9 n), and the light source 3 and scanner 13 return to their home positions (Fig. 9 p). The home position switch 40 provided at is turned on (
FIG. 9q), this causes the light source 3 to stop together with the scanner 13 and wait for the next start (FIG. 9r). In this way, the light source is set to star 1-shi, based on the home position.
and stop.

On the other hand, in response to the above-mentioned registration start signal, the registration roller 19 begins to rotate (FIG. 6G), and the copy paper is thereby fed to the photoreceptor 11 and a visible image is transferred thereto. Passing through the paper sensor 42 is also the same as in the normal copy mode. When this sensor 42 is turned on (Figure 6), a check is made to see if it is in normal copy mode (Figure 6).
At this time, it is not normal copy mode, so continue with duplex second side mode (this will be explained later)
It is checked whether or not it is the same (see Figure 6), and since it is not the double-sided second side mode, the first reversal game 1-49 is turned on (see Figure 6).

As shown in Figure 2, the first reversing gate 49 includes a feed roller 50 disposed between both guide plates 43 and 44;
51, and is driven around the pin 52 between an off position shown by a solid line and an on position shown by a chain line. In the normal copy mode, the first inversion gate 49 occupies the off position shown by the solid line, so
The copy paper coming out of the straightening device 24 is guided by both guide plates 43 and 44 and is ejected directly to the paper ejection tray 26, but in the single-sided spread copy mode, the first reversing gate 49 is indicated by the chain line as described above. Rotate to the on position. Therefore, the copy paper leaving the feed rollers 50, 51 is conveyed in the direction shown by arrow V in FIG. At this time, the second reversing gate 54, which is rotatably supported around the pin 53, is in the off position shown by the solid line, so the copy paper enters the first reversing guide plate 55 without being obstructed by this gate 54. do.

On the other hand, when the fourth paper sensor 56 provided in front of the feed rollers 50 and 51 is turned off at the trailing edge of the copy paper (FIG. 6, h), the timers Tl and T2 are cleared and started (FIG. 6). Power). Then, after checking whether or not the double-sided spread copy mode is in the single-sided copy mode (FIG. 6 T), the timer Tl times up when the trailing edge of the copy paper passes the first reversing game L-54. The reversing gate 49 is turned off and rotated to the off position shown by the solid line (see Fig. 6), and the second
The inversion gate 54 is turned on and brought to the on position shown by the chain line (FIG. 6-2). Then, the two reversing rollers 57 are turned on, that is, they come into contact with each other through the copy paper (Fig. 6).
, and sends out the copy paper in the direction of the arrow toward the paper discharge tray. Thus, the copy paper is delivered to the paper output tray 26 in an inverted state.
is discharged to the top.

When the trailing edge of the copy paper passes the third paper sensor 46 and turns off the sensor 46 (FIG. 6), the second reversing gate 54
is turned off and returns to the position indicated by the solid line, and the reversing roller 57 is turned off.
In other words, both rollers 57 are spaced apart from each other (FIGS. 6 and 6). This operation is repeated a preset number of times (CN
T Sl) is repeated (Figures 6 and 8 ab).
), the counter CNT for counting the number of copies is cleared (FIG. 8 ac).

When the copying operation of the second document surface portion Y is completed as described above, "scan X" is subsequently executed (ad in FIGS. 8 and 9). In the scan X, the light source 3 passes from its home position to the position indicated by the broken line in FIG. 2, that is, the effective illumination start position that irradiates effective light to the first document surface portion After reaching the final end position shown by the chain line, in order to return to the home position again, and in correspondence with this scanning movement of the light source 3, the portion where no latent image should be formed on the photoreceptor is charged with an eraser 29. So that each scan data Xl.

X2. The operation is the same as scan Y except that X3 (Fig. 9 ae) is calculated. Therefore, in this case as well, light source 3
The scanner 13 starts operating from the home position and returns to the home position again, at which time its operation is controlled by the operation of the home position switch 4o. When the scan X is completed for a predetermined number of repeats (FIG. 8 af).

6S), the copying machine processes the stop control routine and stops (FIG. 6C). If necessary, the page of the original 2 is turned over, and the next original surface portions X and Y are copied by the same operation as described above.

As described above, in the spread copy mode, the light source 3 is used both when illuminating the first document surface portion start moving from the same reference position (home position), and scan data Xi, X2 . X3; Yl,
Y2. Y3 is determined, and the distance at which the light source 3 illuminates each portion X, Y is set. Therefore, as in the past, the image area
, Y need not be detected each time by the detection means.

Additionally, in the illustrated embodiment, scan Y and scan
When executing, the original is copied in order from the youngest page, and the copy paper is reversed by the reversing guide plate 55 and then ejected onto the paper output tray 26, so the copy paper matches the pages of the original or in a corresponding order. The sheets are stacked on the paper discharge tray 26.

Figures 13 to 15 respectively show the stacked state of the copy paper 17 when pages 51 to 54 of the original are copied, and the number below each copy paper is the number of pages copied on the copy paper. It shows. Figure 13 shows the case where each page of the original is copied onto copy paper, Figure 14 shows the case where each page of the original is copied onto one copy paper, and Figure 15 shows the case where each page of the original is copied onto copy paper. The state in which three sheets of copy paper are obtained from each page and a sorter, which is known per se, is connected to the copying machine and sorted into each bin 58 is shown.

As can be seen from these figures, the pages of the plurality of completed copy sheets match or correspond to the pages of the original document.

The case where a left-opening book original is copied has been described above, but when copying a right-opening book original, the two-page spread key 47 and the right-opening key 60 shown in FIG. 5 are pressed. In this case, on the contact glass 1.

By placing the original 2 as shown in FIG. 12, the original surface of the younger page will be located on the left side in FIG. 2, so the left side, that is, the first original surface portion X, is copied first. Next, if you copy □ minutes Y of the second document side,
The pages of the obtained copy paper can be arranged. During this copying operation, the light source 3 naturally starts its operation from the home position, and the specific copying mode is as follows.
Since everything is the same as the case of the left-open book manuscript described above except for the copying order, the details will be omitted (
(See Figure 8 ag to ak).

It should be noted that there are more books in general circulation that open on the left, and therefore, it can be said that there are more opportunities for copies to be made with a copying machine. Focusing on this point, when the two-page spread key 47 shown in FIG. If the copy mode for the right-open book is selected only when the key is pressed, the left-open key 48 can be omitted and the operation can be simplified, which is advantageous.

Double-sided copy mode is a mode in which a copy image is formed on the front and back sides of a single sheet of copy paper, without dividing the original into the first and second document side parts X and Y. The double-sided spread copy mode, which will be described later, is a mode in which the document on the contact glass is divided into two parts X and Y, and each part is copied onto the front and back sides of a single sheet of copy paper. Therefore, the latter is the copy mode directly relevant to the present invention.

The double-sided copy mode is selected by pressing the double-sided key 61 shown in FIG. The operation of the optical system in this mode and the copy paper onto which the visible image has been transferred are transferred to the fixing device 24.
The operation from exiting the printer to being conveyed by the feed roller 25°50.51 is the same as in the normal copy mode.

Therefore, the operation after the second paper sensor 42 is turned on by the copy paper on which a copy image is formed on one side, that is, the front surface, will be explained. Note that the process in which a copy image is formed on the front side of the copy paper until the copy paper is fed into an intermediate tray (to be described later) is referred to as the duplex first side mode. The period up to discharge outside the machine will be referred to as the double-sided second side mode.

When the second paper sensor 42 is turned on by the leading edge of the copy paper (Fig. 6), it is checked whether the mode is normal copy mode or not, and whether the mode is double-sided second side mode (Fig. 6).
Since neither of these is the case, the first reversing gate 49 is turned on (see FIG. 6), and the gate 49 rotates to the position shown by the chain line. At this time, since the second reversing gate 54 is in the off position shown by the solid line, the copy paper is conveyed in the direction of arrow V (FIG. 2).

It is fed into the reversing guide plate 55. Next, when the trailing edge of the copy paper turns off the fourth paper sensor 56 (FIG. 6, h), the timers Tl and T2 start clearing (FIG. 6, t).

Next, it is checked whether the mode is single-sided copy mode (
When the trailing edge of the copy paper reaches the front of the reversing paper feed roller 63 provided in front of the second reversing gate 54, the timer T2 is timed up (Fig. 7). The reversing paper feed roller 6, which was separated from the copy paper until
3 falls onto the copy paper while rotating in the direction of the arrow, and the paper feed roller is turned on; the two reversal rollers 57 come into contact with the copy paper, and the rollers are turned on; Begin conveying in the opposite direction to V. In this way, the copy paper is transferred to the gate device 64 by the feed roller 51°63a.
It is fed onto the intermediate tray 65 via the intermediate tray 65, and comes into contact with a stopper 66 provided at the tip thereof and is stopped. In this case, if the copy paper is simply fed onto the intermediate tray 65 by the feed rollers 51 and 63a, the long copy paper will be
Even if the leading edge reaches the stopper 66, there is a possibility that the short copy paper will not reach the stopper 66. In order to prevent such inconvenience, the above-mentioned gate device 11
j64 is used. This device 64 has an appropriate number of first and second devices arranged in the left and right direction in FIG. It has second and third gates 67, 68, 69, and the latter gates 67, 68, 69 are rotatably supported around their pivots 70, 71, 72. In addition, a guide belt 75 is provided opposite these gates and is wound around two rollers 73 and 74 and runs in the direction of arrow E.
Further, a feed roller 76 that pairs with the rollers 73 and 74
．． 77, and two sets of rollers 7B paired with each other.
, '79 are arranged.

When the length of the copy paper is long, the first gate 67 moves positively to the position shown by the solid line and guides the copy paper to the intermediate tray 65 as shown by arrow F. When the length of the copy paper is the next longest, the second gate 68 operates in place of the first gate 67 to the position shown by the solid line, and the copy paper guided by the guide belt 75 and rollers 78 is moved in the direction indicated by the arrow G. Guide as shown.

Similarly, when the length of the copy paper is the next longest, the copy paper is guided by the third game 1-69 (arrow H), and when it is even shorter, it is guided between the rollers 74 and 77 as shown by the arrow I. be done. In this way, the leading edge of the copy paper of any length is reliably conveyed to the stopper 66.

Each of the gates 64 is processed as described above (FIG. 7H), and the fifth gate provided downstream of the feed rollers 51 and 63a is processed.
When the paper sensor 80 is turned off at the trailing edge of the copy paper (the seventh
)), the reversing paper feed roller 63 lifts up (roller 63
7), the two reversing rollers 57 are separated from each other, that is, turned off (FIG. 7E).

Also, when copy paper is carried into the intermediate tray 65.

A sixth paper sensor 81 provided above the tray 65
is turned on by the copy paper (FIG. 7 M), which causes a known copy paper alignment device (not shown) to operate (FIG. 7 M) to move the copy paper into a predetermined position on the intermediate tray 65. Align it to the position. Next, the copy paper is moved to the stopper 66 as described above.
The copy paper stops when it hits the reversing guide plate 5.
5, it is placed with the side on which the copied image was formed first, that is, the front side facing upward.

The predetermined number of times the above operation is repeated CCNT Sl
) is repeated (FIG. 7), and when a predetermined number of copy sheets are stacked on the intermediate tray 65, the first reversing gate 4
9 is brought to the position shown by the solid line (Fig. 7 M), and the duplex second side mode to be performed in the primary is set (Fig. 7 M).
Since the mode is not double-sided copy mode (FIG. 7W), stop control is performed (FIG. 7Y). The above is the double-sided first side mode.

Next, if necessary, replace the original 2 on the contact glass 1 with another one, and press the print key 37 (Y in Fig. 7) again. After copy preparation control (Y in Fig. 7) is performed, A solenoid (not shown) for the stopper 66 is activated (FIG. 7-a), and the stopper 66 is retracted to the position shown by the chain line in FIG. Furthermore, the timer T3 seems to start clear and the 7th
plan).

When the timer T3 times up (FIG. 7), the paper refeed roller 82 located above the intermediate tray 65 turns on, that is, begins to rotate (FIG. 7).

Therefore, the copy paper is sent out from the intermediate tray 65 as shown by arrow J, and the leading edge of the copy paper reaches the registration roller 19 again, and the first paper sensor 38 is turned on (Fig. 7), thereby stopping the copy paper. Then, it continues to stop until a registration start signal is generated. At this time as well, the optical system 5 operates in the normal copy mode described earlier,
Upon generation of the registration start signal (FIG. 6), the registration rollers begin to rotate (FIG. 6G), and the copy paper is again sent to the photoreceptor 11, where the copy image is transferred to the back surface. This copy paper passes through the fixing device 24 and the second paper sensor 4
2 (Figure 6), a check is made to determine whether the mode is normal copy mode (Figure 6) and a check is made to determine whether the duplex mode is on the second side (Figure 6). Since it is the two-sided mode, the copying process does not pass through the reversing guide plate 55 and the intermediate tray 65, as in the normal copy mode, and both guide plates 43. 3rd while being guided by '44
The paper passes through the paper sensor 46 (FIG. 6) and is directly conveyed to the paper output tray 26. After the same operation is repeated the number of times, stop control is performed (FIG. 6, S and C).

Double-page spread copy mode This mode is selected by pressing the two-page spread key 47 and the double-sided key 61 shown in FIG. The operations of the light source 3 of the optical system 5 and the scanner 13 are performed in the same way as in the double-page spread single-sided copy mode. Therefore, the light source 3 again starts operating from its home position both when illuminating the first document surface portion and when illuminating the second document surface portion. The operation of the copy paper is also almost the same as the duplex copy mode, but the only difference is that the print key 37 does not have to be pressed when switching to the duplex second side copy mode after the duplex first side copy mode ends. (Figure 7 wa→u). In double-sided spread copy mode, the first document surface portion X and the second document surface portion Y of the same document 2 are copied on the front and back sides of the same copy paper, so after copying of one portion X or Y is completed, Since there is no need to replace the original with another one, it is possible to continuously copy the other original surface portion Y or X without pressing the print key 37 anew.

Even in the normal double-sided copy mode or double-sided spread copy mode, as is clear from the above, the pages of the completed copy paper can be aligned with the pages of the original document. FIG. 16 shows an example of a state in which copy sheets 17 obtained in these copy modes are stacked on the paper output tray 26, and the number attached to each copy sheet indicates the number of copied pages. .

Note that the hatched areas above each key shown in FIG. 5 are indicator lamps, such as LED lamps, that light up when each key is pressed.

It is used to notify the operator that the key is in the on state.

The details of each copy mode have been clarified above.

The illustrated copying machine is configured to display the position at which the document should be placed in order to facilitate the operation of placing the document on the contact glass 1.The configuration related to this will be explained below. put.

FIG. 17 is a plan view of the copying machine viewed from above, showing a state in which the contact glass l is fixed to the main body 4 of the copying machine. A document abutting member 85 for positioning the document is fixed on the left side of the contact 1 to the glass 1. The edge of the document is placed on this member 85, and the document 2 is placed on the contact glass 1 as illustrated by the broken line. Place it. Further, in a portion of the main body 4 near the contact glass 1, a plurality of indicator lamps 86 are arranged along the abutment member 85, and a plurality of indicator lamps 87 are arranged in a direction orthogonal to these lamps 86. It is provided.

On the other hand, as described above, the length detecting means 30 (FIGS. 3 and 4) detects the length and width of the copy paper, that is, the overall size of the copy paper. Indicator lamps 86, 87 are selectively lit. For example, consider a case where a book original with a size of 84 when opened and a size of each page of 85 is to be copied at the same size in the spread (single-sided or double-sided) copy mode. In this case, normally B5 size copy paper is used, but when the size of the copy paper is detected and the two-page spread key 47 (FIG. 5) is pressed, the symbol 8
6a, the two rB5 horizontal lamps are lit, and among the other indicator lamps 87, codes 87a and 87b are lit.
The two lamps labeled rB5 horizontal J and rB4J are lit. Therefore, the operator can place the original 2 on the contact glass l by aligning the width of the original 2 with the two lamps 86a and the length of the original 2 with the lamp 87b as shown by broken lines in FIG. At this time, one more
By lighting up the two lamps 87a, it can be confirmed that the original 2 is divided into first and second original surface portions X and Y.

Also, when copying in a copy mode other than the two-page spread copy mode, for example, when copying a B5 size original onto 85 copy paper, only the two lamps 86a and one lamp 87a mentioned above are turned on. Along with this, a B5 size original is placed.

In the two examples mentioned above, copy paper 1 as shown in FIG.
7 is placed horizontally, its long side 17m is perpendicular to the feeding direction T of the copy paper, and the short side 17n is aligned with the feeding direction T, and the copy paper is fed.
When the copy paper 17 is fed vertically as shown in FIG. 9, a corresponding indicator lamp is lit. For example, if you copy an A4 size original in normal copy mode,
When copying at the same size on 4-size portrait copy paper, use rA.
Two lamps 86b for ``4 vertical'' and one lamp 87c for ``rA4 vertical'' are lit, and the original 2 can be placed accordingly. On the other hand, when you want to make a same-size copy from an A4-size original onto A4-size horizontally fed copy paper in normal copy mode, use two wings 86c of ``rA4 horizontally.''
One lamp 87d of "rA4 horizontal" lights up. In this way, the size of the copy paper and the direction in which it is sent (vertical, horizontal)
The lamp is selectively turned on in accordance with this, and the document can be placed in accordance with this.

Also, when the copy magnification is selected other than equal magnification, the lamp lights up correspondingly. For example, if copy paper is fed horizontally,
When the size is 85, the copy magnification is 0.865, and the spread copy mode is selected, there are two rA4 horizontal lamps 86c and one rA4 horizontal lamp 8'.
7d lights up, and the "A3" lamp 87e lights up.

By the way, there is a limit to the size of contact glass 1.
As mentioned above, a document larger than this size cannot be copied. In the contact glass 1 shown in FIG.
It is possible to copy originals up to three sizes (the position of the lamp 87e), but it is not possible to copy documents larger than that. Therefore, for example, an A4 size copy paper 17 is conveyed horizontally as shown in FIG.
When trying to form a copy image of the original, the corresponding original is A3 size and must be placed horizontally on the contact glass 1). If placed, in Fig. 17,
A portion of the document protrudes above and below the contact glass l, making it impossible to copy it. Therefore, when the condition 1, which cannot be copied, is selected, for example, a mismatch alarm lamp 88 provided in the key manual section 36 (FIG. 5) lights up.

Otherwise, it is configured to notify the operator that copying is not possible by sounding a buzzer, etc.).

As mentioned above, the copying machine having the contact glass 1 shown in FIG. 17 can copy originals up to A3 size. In this case, the operator who operates the copying machine normally selects the copy paper size taking into account the size of the original and the copying magnification, and copies on this paper. However, in some cases, due to an error, When you do not have copy paper on hand, it is conceivable to use copy paper that is larger than the size of the copy image to be formed. Parable,
Each page is A4 size, and when opened it is double A3 size.
When copying a sized book original in the double-page spread copy mode, it is common to use A4-sized copy paper and set it in landscape orientation in the main body of the copying machine. However, for some reason mentioned above, it is conceivable that copy paper of a size larger than A4, for example, A3 size, may be used. In such a case, the length of the copy paper is detected by the length detection device 30 as described above,
This is transferred as is to the accumulator (Fig. 8 W)
, scan data is calculated (Fig. 8 This results in a scanning movement that is twice the distance required to illuminate the surface portion X or Y, and it becomes impossible to copy the predetermined copy image in the two-page spread copy mode onto copy paper.

Therefore, if there is a risk of such inconvenience occurring, please
It is advantageous to change the control mode of the portion surrounded by broken lines in the figure as illustrated in FIG. 20. In the example shown in Figure 20, when the two-page spread copy mode is selected, it is necessary to check whether the size of the set copy paper is A4 or larger.
1) If this length is smaller than A4, the length data is transferred to the accumulator A c c as in the case of FIG. 8 (w2) in FIG. 20, and the scan data is calculated.

Then, when the copy paper size is A4 or larger, the length of the copy paper is assumed to be A4, and the length data is transferred to the accumulator Acc (Fig. 20 w3), and scan data is calculated based on this. . In this way, an image of the first or second document surface portion can be formed on copy paper of A4 or larger size. In this case, there may be extra margins on the A4 size copy paper, but this will not cause any inconvenience in terms of obtaining a copy image. Even in the embodiment shown in FIG. 20, the scanning movement distance by which the light source 3 illuminates each document surface portion X, Y is still set in accordance with the length of the copy paper.

FIG. 21 is a block diagram summarizing the various controls described above, and the optical system control section 89 controls the optical system shown in FIGS. 8 and 9, and also performs the control described above. In this section, conversion control of the copying magnification is also performed, the details of which are not shown. Further, the main control section 90 performs the control shown in FIGS. 6 and 7 and other main controls other than the optical system of the belly camera, and communicates with the operation control section 91 and the optical system control section 89.

The operation control section 91 controls a display device 92 such as a display lamp shown in FIGS. 5 and 17, and a key manual section 36. For example, as shown in FIG. 2, the copy paper 17 is fed from the paper feed cassette 16 toward the registration rollers 19, and the first paper This is performed during a determination routine, such as before the sensor 38 is turned on. Furthermore, the sensor 93 in FIG. 21 collectively represents the first to sixth paper sensors 38, 42, 46, 56, 80, 81, etc. described earlier, and signals from these sensors are used for main control. 9 shows the state input to the section 90. Similarly, a sensor 98 collectively represents the home position switch 40 and the sensor 31 of the length detecting device 30, which are activated when the light source 3 and scanner 13 move or return from the home position.

It is also clear from FIG. 21 that the signals from these are input to the optical system control section 89. 94 is an optical system control section 89
96 is a load to which the output from the main control unit 90 is input via the driver 97, such as an optical scanner.

That is, various elements other than the optical system shown in FIG. 2, such as the photoreceptor 11. The developing device 14 and the like are generally shown.

In the above-mentioned embodiment, the document on the JFX document loading table is illuminated and scanned by the document illumination scanning means having the light source 3 and the scanner 13, and at this time, the selection means consisting of the two-page spread key 47 is used to scan the document for two minutes. At least one key 48.degree. 60 for selecting whether or not to illuminate the document 2 and setting whether the document 2 is to be opened to the right or to the left. Set up the stamping motor, register, accumulator,
A two-part document illumination control means including a pulse counter causes the light source 3 to illuminate each document surface portion x and y, respectively;
The detection consists of a home position switch 40 that sets the illumination scanning distance of each portion X, Y according to the length of the copy paper and the copy magnification, and is activated when the light source 3 and scanner 13 start or return from the reference position. When illuminating any of the document surface portions X and Y using the light source 3
The starting position of was controlled to be the reference position. Further, in the similarly illustrated embodiment, illumination of each document surface portion X, Y,
In other words, the length or time of effective light irradiation on these areas is determined by controlling the lighting on/off of the eraser 29 and the light source 3, which determine the position of the leading edge of the latent image on the photoreceptor, and the forward movement and return movement of the document illumination scanning means. However, the present invention is limited to such a configuration. It goes without saying that the present invention is not limited to a specific embodiment, and can be implemented in various ways. For example, the present invention can be applied to a copying machine that cannot change the copying magnification, and the present invention can also be applied when copying a sheet original rather than a book original.

In the present invention, the light source starts operating from the same reference position when illuminating either of the two divided document surface portions, and the scanning movement distance of the light source to illuminate each document surface portion is
Since the setting is made according to the length of the copy paper, there is no need to divide the document into two parts using a special detection means, which improves the ease of operation and the accuracy of setting the two-part position.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a part of a copying machine to clarify a conventional copying method and a basic configuration example of the present invention;
3 is a cross-sectional explanatory diagram showing the overall configuration of a copying machine to which the present invention is applied; FIG. 3 is a perspective view showing an example of a length detecting device, with its photoelectric sensor and a cassette separated from each other; FIG. is a sectional view taken along the line IV--IV in FIG. 2, FIG. 5 is a plan view of the key manpower section, and FIGS. 6 and 7 are flowcharts mainly showing the conveyance state of copy paper and related control states, Figures 8 and 9 are flowcharts showing the control of the optical system, Figure 10 is a perspective view of a left-opening book, Figure 11 is a perspective view of a right-opening book, and Figure 12 is a book original placed on a contact glass. FIGS. 13 to 16 are explanatory diagrams showing the stacked state of copy sheets discharged from the main body of the copying machine, and FIG. 17 is a plan view showing the state in which copy sheets are placed, and FIG. 18 and 19 are explanatory diagrams showing the orientation of copy paper set in the copying machine body, respectively. FIG. 20 is a partial flow diagram showing a modified example of FIG. 8, and FIG. The figure is a block diagram showing an outline of the relationship between each control section. 2...Original 3...Light source 17...Copy paper L...Length x, y...Document surface part Fig. 10 Fig. 11 Fig. 12a Fig. 13 Fig. W & 14 Fig. 4 Fig. 15 Figure 16) Figure 20 Figure 21

Claims (1)

[Claims] The document surface is divided into two document surface portions, each of which is illuminated by a light source that scans and moves with respect to the document, and the images of each of the two document surface portions are separately displayed. In a copying method for copying onto a copy paper surface, the light source starts its operation from the same reference position when illuminating either of the two divided document surface portions;
and a copying method characterized in that the scanning movement distance by which the light source illuminates each document surface portion is set according to the length of the copy paper.