JPS60165671A - Electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To form an electrostatic latent image other than an original image sharply on a photosensitive body at a specific position and realize sufficient functions as a copying machine by detecting the arrival of an exposing means at the specific position and forming the image other than the original image at the specific position according to the signal of said detection. CONSTITUTION:An original platen 2 moves and a cam 71 abuts on the 2nd microswitch 68, so that the presence of the front end of an original at the specific position is detected. Its detection signal is inputted to a CPU which controls an LED array 15, which is driven. The electrostatic image other than the original image is formed at the specific position through a short-focus lens array 14 and a desired toner image is formed at a constant position from the front end of copy paper after development. Thus sufficient functions as the copying machine are realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electronic copying machine equipped with means for forming an electrostatic latent image other than an original image.

(b) Prior art Assuming that a photoreceptor is provided with a means for forming an electrostatic latent image other than an original image, there are methods described in Japanese Patent Publication No. 58-24785 and Japanese Patent Application Laid-Open No. 57-74762. do.

All of these methods form a latent image other than the original image on the photoreceptor, but the former method reduces the exposure amount of the original image so that the electrostatic charges become approximately %. That is, the potential of the latent image portion is controlled to be lowered from 700V to 350V, and an electrostatic latent image other than the original image is formed using the remaining amount of charge. Therefore, it was impossible to adjust the density of the image, and it could not be used as a copier, let alone a printer.

Further, the latter only describes the basic configuration of the present invention, and does not disclose a second specific means for forming an image other than the original image.

(c) Purpose of the invention The present invention was developed in view of the drawbacks of the prior art, and
It is an object of the present invention to realize an electronic copying machine which can form an electrostatic latent image other than an original image clearly and at a desired position on a photoreceptor and which can function satisfactorily as a copying machine.

(2) Structure of the Invention The present invention includes means for detecting that the exposure scanning means has arrived at a predetermined position and outputting a detection signal, and forming an electrostatic latent image of an image other than the original image on a photoreceptor. The electronic copying machine is characterized in that the electrostatic latent image of the image other than the original image is formed on a portion of the copy paper corresponding to a predetermined position in accordance with the detection signal.

(e) Embodiment FIG. 1 is a perspective view showing the appearance of an embodiment of the present invention, and FIG. 2 is a plan view showing the display section thereof. In these figures, (1> is the copying machine main body;
) is slidably mounted on the upper surface of the document table (2), which can be moved left and right.

3- (3) is a paper cassette in which copy paper is loaded and stored;
> is paper ejection) and lay. In addition, (6) on the operation panel (5) is a numeric keypad for specifying the number of copies, and (7) is for printing selection used when selecting images other than the original image (for example, date or company name). This is the selection key. Display panel (8
) Above (9) is a 7-segment display element for displaying the number of copies, and (10) is a 7-segment display element for displaying designated print content by number.

FIG. 3 is a diagram showing the printed content corresponding to the selection key (7). In this figure, the numbers marked north of "C, Selection selection gear" represent the printed contents. Therefore, if the operator presses the selection key 5, for example,
), in addition to the original image, ``Japanese'' will be printed on the copy paper. Similarly, by operating the selection key (7) with the number 8 on the C key, the address can be printed out. The printed content corresponding to each selection key (7) is as follows:
It is assumed that the information is stored in advance in a read-only memory (ROM).

4- Figure 4 shows the selection key (7)... and this selection key (
7)... is a diagram showing the correspondence with the content printed on copy paper (11>) by operating.
), press the selection key (7)... as the key number changes from 3 to 4.
→ If you operate in the order of 5 → 6 → 8, copy paper (11)
The text as shown is printed on the right side (with respect to the direction of travel). In addition, in FIG. 4(B), when the selection keys (7)... are operated in the order of key numbers 1 → 3 → 6 → 9 → 4, this figure is displayed on the right side of the copy paper (11). The text in English characters as shown in is printed. Furthermore, in FIG. 4(C), when the selection keys (7)... are operated in the order of key numbers 2 → 10 → 7 → 11, the right side of the copy paper (11) is displayed as shown in this figure. Vertical text like this is printed.

Figure 5 is a sectional view showing the internal structure of the electronic copying machine, (2)
is a document table made of a transparent glass plate that is attached to the top surface of the copying machine body (1) so that it can be moved freely in the left and right directions, and a cover (12) is attached to the top surface of this document table (2) that can be opened and closed freely. It is installed. Approximately in the center of the copying machine body (1) is a photoreceptor drum (1) whose peripheral surface is coated with an amorphous 5-silicon photoreceptor.
3) is rotatably mounted. Photosensitive drum (13
A short focus lens array (14) is vertically installed on the top of the document table (2) to form an image of the document placed on the document table (2) on the circumferential surface of the photosensitive drum (13). There is. A photosensitive drum <1
A monolithic light emitting diode array (hereinafter referred to as an LED array) (15) is provided on the LED array (15) for forming an electrostatic latent image other than the original image. will be described later.Furthermore, a charging corotron (16) for uniformly positively charging (approximately 600 V) the photoreceptor drum <13) is fixedly installed upstream of the short focus lens row (14). An exposure lamp (halogen lamp) (17) for illuminating the surface of the document is provided above the charging corotron (16). (18) An electrostatic latent image of the original is formed on most of the photoreceptor drum (13) by the dotted lens array (14) and the original, and the LED array (15) described in 6- above forms an electrostatic latent image of the original. Photosensitive drum (13
) An electrostatic latent image other than the original image is formed on a part of the image.

A developing device 19) for developing the electrostatic latent image with toner is provided downstream of the short focus lens array <14>. This developing bag! A mixture of toner and carrier (developer) (20) can be stored in (19), and this developer (20) is conveyed to the photosensitive drum (13) while being negatively charged. be done. At this time, spikes of the developer (20) are formed on the portion of the magnet roller (21> that faces and faces the photoreceptor drum (13), and the tips of the spikes contact the photoreceptor drum (13) to form positive The negatively charged toner adheres to the electrostatic latent image formed by electric charges, and the original image and other images are developed. This is a blade that controls the height.

A paper feed cassette (3) in which copy paper (11) is loaded and stored is removably attached to the right end of the copying machine main body. A support plate (23) on which copy paper (11) is placed is swingably provided at the bottom of the paper feed cassette (3). An opening 2 through which the free end of the push-up/head (24) is swingably attached to the inner bottom of the copying machine body (1).
5) is provided. A spring (not shown) is attached to the push-up lever (24) to urge it to rotate clockwise, and the support plate (23) is pushed upward by this spring. A paper feed roller (26) that feeds the copy paper (11) one sheet at a time is provided above near the downstream end of the paper feed roller h (3). ) is pressed against the lower part of the paper feed roller (26>) by the push-up lever (24>).

A paper feed cassette (
A pair of register rollers (27) (27) are installed to temporarily stop the copy paper (11) fed from the paper tray (3) and then feed it again in synchronization with the operation of the document table (2). I'm getting lost. (28) is a reflective photo sensor that detects the presence or absence of copy paper (11).

A toner image developed by the developing device (19) is placed on a copy paper (11) at the lower end of the photosensitive drum (13).
A transfer corotron (29) for transferring images is provided. Also, on the downstream side of this transfer corotron (29),
A peeling corotron (30) for peeling the copy paper (11) from the photosensitive drum (13) is disposed adjacently.

A vacuum conveyor (31) for conveying the copy paper (11) on which the toner image has been transferred is provided downstream of the peeling corotron (30). The fixing device (3) is connected by this conveyor (31).
2).

The fixing device (32) is composed of a heat roller (34) with a built-in heater (33) and a pressure roller (35) that is brought into pressure contact with the heat roller roller (34). These two days - La (34) (35
) and is heated under pressure and fixed. (36) is an offset prevention claw that prevents the fixed copy paper (11) from being offset to the heat roller (34). downstream (il) of the heat roller (34)
A pair of paper discharge rollers (37) and (37) are provided in the copy paper 9 for discharging the fixed copy paper (11). ri38)
is a detection switch that detects copy paper (11).

Above the vacuum conveyor (31), copy paper (1
1) is provided with a cleaning device (39) for removing toner that has not been completely transferred and remains on the photosensitive drum (13). This cleaning device (39) includes a cleaning blade (40) that scrapes residual toner on the photoreceptor drum (13), and a cleaning blade (40) that scrapes off residual toner on the photoreceptor drum (13).
) to the toner storage box (41).
and a roller (42) that conveys the paper to the paper.

Then, press the selection key (7) on the operation panel (5).
After pressing a desired one of ., placing the original on the original table (2) and pressing the start button (43) (Fig. 1), the exposure scanning of the original is performed. That is, the manuscript table (2
) moves to the left, then to the right, and this right
- During the movement, the original is exposed and scanned, and the original image is projected onto the photoreceptor drum (13) by the S focusing lens array (14), forming an electrostatic latent image corresponding to the original image. be done. ,
In the second case, the LED array (15)... selectively emits light, and the content (for example, date, etc.) corresponding to the operated selection key is displayed.
electrostatic latent images are simultaneously formed on the photoreceptor drum (13).

The document thus formed and the electrostatic latent image of the wording selected by the selection key are developed with toner in a developing device (19). This toner image is then transferred by the transfer corotron (29) onto the copy paper (1) that has been conveyed by the register roller pair (27)<27). The copy paper (11) on which the toner image has been transferred is completely peeled off from the photosensitive drum (13) by a peeling corotron (30), and then transferred to a fixing device (11) by a vacuum conveyor (31).
32) and is completely fixed by the heating roller (34) and pressure roller (35). The thus fixed copy sheet <11> is discharged onto the paper discharge tray (4) (FIG. 1) by a pair of paper discharge rollers (37) (37).

Note that the photosensitive drum (11) was not completely transferred to the copy paper (11)
13) The toner remaining on the surface is removed by the cleaning device (
39>, and the cleaned photosensitive drum (13) is uniformly newly charged with a positive charge by the charging corotron (16).

Figure 23 shows the document table (2) and the microswitch (67) that detects the position of the document table (2) and outputs a detection signal.
) (68) and (69). In this figure, the first microswitch (67) determines the final stop position of the document table, and the second microswitch (68) detects the position of the leading edge of the document and controls the copy paper (11). This is to match the leading edge of the document with the leading edge of the document. Further, the third microswitch (69) is used to determine the starting position for starting exposure.

(70) (71) (72) are each micro switch (67
)(68)(69).
) is a cam that can be fixed on the bottom surface of the cam.

Then, when the document table (2) moves and the cam (71) comes into contact with the second microswitch (68>), this second
The microswitch (68) detects that the leading edge of the document is at a predetermined position, and the detection signal is sent to the L
It is output toward the CPU (60) that controls the ED array (15). Then, an electrostatic latent image of an image other than the desired original image is formed on a portion of the photoreceptor drum (13) corresponding to a predetermined position on the copy paper (11), and finally
A desired toner image is formed at the predetermined position of 1).

Note that if the LED array (15) is operated after a certain period of time t1 has passed since the second microswitch (68) has detected the leading edge position of the document, the 221st ffl
As shown in (P), images other than the original image (specifically, the words "Let's take care of the single paper and the R source") are kept at a certain distance from the leading edge of the copy paper (11)! Formation will start from a position separated by a certain distance.

To explain this process in more detail based on the flowchart shown in FIG. 24, first, the second microswitch (68
), when it is detected that the document table (2) is in a predetermined position, the delay key (not shown) is pressed on the operation panel (
5) It shall be above. ) is input. At this time, if it is determined that the input of the delay key has not been completed, the LED array (15) will immediately operate and start forming an image other than the original image from the leading edge of the copy paper (11). . Furthermore, when it is determined that the input of the delay key is "present" (13-), even if the photosensitive drum (13) starts rotating,
The LED array (15) does not operate and this non-operating time is counted down. Then, the fully set delay time t1 and the fully counted delay time t2 are compared, and t 1 = t 2
The LED array (15) is activated at the point in time. Then, the formation of the image will start from a position spaced apart from the leading edge of the copy paper (11) by a distance p corresponding to the delay time t1.

Next, the LED array (15) will be explained in detail. Figure 6 shows an LE that is slidably provided on the short focus lens row (14).
It is a perspective view showing a D array (15) and the like. In this figure, (44) is a holder that holds the LED array (15), and is mounted on the short focus lens row (14) so as to straddle this. A lead screw 45) extending parallel to the rotational axis of the photoreceptor drum (13) is inserted into the holder (44), and when the lead screw (45) rotates, the holder (44) partially screws up. move parallel to the axis of (45). (46) is a stepping motor for rotating the lead screw (45).

Note that the exposure lamp (17) is located on the side 1 of the short focus lens row.
It is located on the 4th side.

Figure 7 shows the LED array (15) and short focus lens array (14).
) is shown in a cross-sectional view taken in a direction perpendicular to the axis of the photoreceptor drum (13). In this figure, illustration of the holder (44) is omitted.

(47) is an alumina substrate to which the LED array (15) is fixed, and this alumina substrate (47) is fixed to an aluminum fixing base (48) which also serves as a radiation fin. Moreover, this fixing base (48) is attached to the holder (44).
(Fig. 6). The alumina substrate (47
), these LEDs are placed on the left and right of the LED array (15).
Driver IC (49) that drives the array (15)
(49) is fixed, and the flat couple (51) is completely connected via the connector (50). A transparent glass plate (52) for protecting the LED array (15) and the like is attached to the lower part of the fixing base (48). Figure 8 is L
FIG. 9 is a partially sectional perspective view showing the ED array (15) and the short focus lens array (14), and FIG. 9 is a perspective view showing the alumina substrate (47). FIG. 10 is a partially enlarged view showing the LED array (15), where (53)... are light emitting parts, (
54)... is an electrode. These electrodes (54)...
・Alumina substrate (47) via gold wire (55)...
It is connected to the upper pattern wiring (56). This LE
The size of each light emitting part in D play (15) is 0.07
X0.08 (mv+) Te, the total length is 14.84 (m
m), the pitch is 0.106 (IInTI),
The number of dots is 128.

The LED array (15) is a red LED formed by mounting GaAs on a GaAsP base.
It is composed of the ED group, and the emission wavelength is approximately 6,600. Therefore, photoreceptors suitable for this purpose are limited to amorphous silicon having long wavelength characteristics, selenium having a high tellurium content, and the like. In this regard, if a green LED array (wavelength: 5650) is used, the range of types of photoreceptors that can be used with it will be expanded.

In Fig. 7, TC is the conjugate length, and zo is the lens (14〉
The length +20 represents the distance from the end surface of the lens (14) to the LED array 15) or the photosensitive drum (13). The relationship between these dimensions and the wavelength of the LED is shown in the following table.

Note that a halogen lamp is used as the exposure lamp <17) for illuminating the surface of the document, and the center wavelength of this halogen lamp is approximately 5,500. Therefore green LE
The same short-focus lens array can be used for the D array and the halogen lamp, but the length of the lenses used must be different for the red LED array and the halogen lamp, so the same short-focus lens array <14) must be used for the red LED array and the halogen lamp. cannot be used.

FIG. 11 is a perspective view 17 showing a state in which the LED array (15) has been moved to the outside of the short focus lens row (4).
− is. In this state, an original image is formed over the entire area of the short focus lens array <14). If this state is explained in detail along Figures 12(A) and (B), Figure 12(
In A), the LED array 15) is a short focus lens array (14)
Fig. 12 (B) shows the state where it is located near the right end of
shows a state in which the LED array (15) is located outside the right side of the short focus lens row (14).

In the state shown in FIG. 12(A), the holder (44) is above the part on the photoreceptor where the electrostatic latent image "Sanyo" other than the original image can be formed, so the original image rcD, is not projected and imaged on the photoreceptor drum <13).Therefore,
An original image other than the original image formed by the ABJ and LED array (15) is formed as an electrostatic latent image. On the other hand, in the state shown in FIG. 12(B), L
Since the ED array <15) does not exist on the short focus lens row (14), all the lenses (7) on the photoreceptor drum (13)
) W The original image is projected and imaged, but the electrostatic latent image other than the original image is never completely formed.

FIGS. 13A and 13B show an embodiment in which only the original image can be projected onto the photoreceptor drum (13) without moving the LED array 15) in the direction of the rotation axis of the photoreceptor drum (13). It is a perspective view showing an example. In this embodiment, the holder (44) is configured to be able to be opened and closed at its upper end;
When forming an image 1 other than the original image, the LED array (15) is located above near one end of the short focus lens array (14) as shown in FIG. 13(A). In this case, the portion of the photoreceptor drum (13) that is shielded from light by the holder (44) and faces the LED array (15) includes:
The original image is not projected.

Furthermore, if it is desired to project and form the entire document image onto the photosensitive drum (13), an LED playback (15) of the holder (44) is provided as shown in FIG. 13(B). One side wall may be rotated using the lower end as a fulcrum.

Then, the entire upper part of the short focus lens row (14) is opened, and all the document images 'ABJ'CD, are transferred to the photoreceptor drum (
The projection image will be formed on 13〉.

FIGS. 14(A) and 14(B) show yet another embodiment similar to the embodiment shown in FIG. 13. In this example, the LED array <15> is placed in the holder <4
4) is completely fixed to the lower surface of the lid (57) which is attached to the upper part of the lid (57) so as to be openable and closable. When forming an image other than the original image, as shown in FIG. 14(A), the lid body (5
7) and when projecting and forming only the original image, the first
This lid body (57) may be opened as shown in FIG. 4(B).

Figure 15 shows the LE sliding the short focus lens row (14).
Holders (44a) (4) of D array (15a) (15b)
4b) shows an example in which two LED arrays (15a) (15b) are provided, and when a plurality of LED arrays (15a) (15b) are provided in this way, a plurality of electrostatic latent images other than the original image can be formed in parallel. (See Figure 22 (E) and (F)). Also, by moving the holder <44) to an appropriate position,
An electrostatic latent image other than the original image can be formed at a desired position. In this case, by moving the holder (44) while rotating the photosensitive drum (13), an image other than the original image can be formed diagonally across the copy paper (11). Furthermore, if only the holder (44) is moved without rotating the photosensitive drum (13), the copy paper (11)
Images other than the original image can be formed in a direction perpendicular to the moving direction.

FIG. 16 is a perspective view showing an embodiment in which an LED array (15) is provided on the side of a short focus lens array (14) for projecting and forming an original image. (44) blocks light from a portion of the photoreceptor drum (13) corresponding to the portion on which an electrostatic latent image other than the original image is formed.
A dedicated short focus lens array (58) is fixedly installed to project and form the image formed by this LED array (15). By providing the dedicated short focus lens array (58) in this way, the LED array (15) can be brought closer to the photosensitive drum (13), and the height of the holder (44) can be lowered.

Figure 17 shows that the LED array (15) is connected to the short focus lens row (1
FIG. 4) is a perspective view showing an embodiment fixedly installed in FIG. In this embodiment, a plate-shaped holder (59) is fixedly attached to one end of the short focus lens array (14), and this holder (59) is used to hold images other than the original image. It also serves as a light shielding plate for the area where the latent image is formed. FIG. 18 is a side view corresponding to FIG. 17, and shows an LED on the right end of the holder (59).
An array (15) is fixedly installed. (58) is a dedicated short focus lens array for forming an electrostatic latent image other than the original image. If the LED array (15) is fixed to the short focus lens row (14) in this way, the formation position of the electrostatic latent image other than the document image cannot be changed, but the LED array (
15) There is no need for a mechanism or control circuit for moving the device, and the entire structure can be made compact.

19(A), (B), and (C) show a short focus lens array in an embodiment in which an LED array (15) is fixedly attached to a short focus lens array (14) as shown in FIG. 17 etc. (14
) is a perspective view showing different aspects of the invention. Figure 19 (A)
The one shown in the figure is a short focus lens array (
One end of 14) is cut out, and an LED array (15) is fixed on the top of the arrow part.

19(B) and 19(C) each have an LED in the short focal length lens array (14) that projects the original image.
The short focus lens row (58) dedicated to the array (15) is attached externally (
This is what was written. In this way, the LED array (1
5) = 22 = The reason for shortening the length of the lens of the short focus lens array (58) that forms the image is by using a red LED to connect the photoreceptor from the LED array (15) as described above. Drum (1
This is to shorten the distance to 3) and make the entire device compact.

Figure 20 shows the developing device shown in Figure 5! FIG. 19 is a perspective view showing another embodiment of (19), in which black toner is completely stored in the part corresponding to the original image, and non-black toner is stored in the part corresponding to the electrostatic latent image other than the original image. (e.g. brown toner)
is stored. In this figure, <21a) is a magnet roller for forming an original image, and (21b> is a magnet roller for forming an image other than the original image. When such a developing device (19) is used, copy paper (11) ),,1m
In this case, the original image is copied in black, and images other than the original image, such as the date, can be printed in a color other than black (for example, brown). In this embodiment, since it is difficult to move the part where the brown toner is completely stored in parallel to the rotation axis of the photoreceptor drum (13), the position where images other than the brown original image are formed is changed. It is difficult to move it.

FIG. 21 is a block diagram showing the control circuit. In this figure, the circuit configuration of the entire electronic copying machine is omitted, and only the circuit configuration for forming the original image and the external image is shown. In order to form an image other than the original image, it is sufficient to operate the selection key (7) corresponding to the image other than the desired original image. Then, the central processing unit (CPU)
(60), read-only memory (ROM) (
61), the information corresponding to the image other than the original image is transferred to the read/write memory (RAM) (62), and further...
In synchronization with the operation of the electronic copying machine, (RAM) (62
) is transferred to the pattern generator (63). The pattern generator (63) drives and controls the LED driver (64).
4) causes the monolithic LED array (15) to selectively repeat blinking to form a desired image. The display (65) indicates the operating status of the electronic copying machine and the order in which images other than the original image are formed. Further, the mechanism control section (66) controls the entire operation of the electronic copying machine.

FIG. 22 (A> to P) are plan views showing different embodiments of copy sheets on which images other than original images have been formed according to embodiments of the present invention. Of these figures, the second
In Figure 2 (A> or 0), images other than the original image are on the copy paper (
11) is formed near the tip.

Figure 22 (A) shows the characters ``1A1'' written in white on a black background, and Figure 22 (B) shows the letters ``1A1'' written in black on a white background.
A1" is formed.

When printing with an LED array in a printer or the like, a black print is usually formed only on the portion corresponding to the light emitting part of the LED by performing reversal development. However, in the case of an electronic copying machine, if reversal development is allowed, the black and white of the original image will also be reversed, causing a problem. Therefore, in the case of the present invention, when forming white characters etc., it is sufficient to cause the LED array to emit light in correspondence with the characters, but when forming ordinary characters, it is sufficient to make the LED array correspond to the hack ground. It is necessary to make the LED array emit light.

-25~ Figure 22 (C) shows an example with the company name printed on the left edge, and Figure 22 (D) shows an example with the LED array moved and the postal code printed horizontally in the center. show.

Fig. 22 (E) shows an example of printing the company name and location name near both sides of the copy paper using two LED arrays, and Fig. 22 (F) shows an example of printing the company name and location name near both sides of the copy paper. An example of what is printed at the position is shown below.

Figures 22 (G) and (H) show examples of patterns other than letters formed near the right edge. Section 22 (I> is a combination of vertical and horizontal letters near the right edge. An example of what is printed is shown below.

FIG. 22(J) shows an example of printing near the right edge of copy paper of various sizes.

Figure 22 (K) (L > (M) shows examples of printing with different copying speeds of the electronic copying machine; (K) is the one printed at the slowest speed, and (M) is the one printed at the highest speed. An example is shown.

FIG. 22(N) shows an example with a frame, and FIG. 22(0) shows an example with a scale near the right end.

FIG. 22(P) shows an example in which printing is started from a position P away from the leading edge of the copy paper as described above.

(F) Effects of the Invention According to the present invention, it is possible to clearly form a silent tfI image of an image other than the original image, regardless of the original image, and the formation position of this image can be freely changed. , it is also possible to respond to various requests from operators of electronic copying machines.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and FIG. 1 is an external perspective view, FIG. 2 is a plan view showing the display section, FIG. 3 is a view showing the inside of the print corresponding to the selection key, and FIG. 5 is a sectional view showing the internal structure of the electronic copying machine, FIG. 6 is a perspective view showing the short focus lens array and the LED array, and FIG. The figure is a cross-sectional view showing a short focus lens row and an LED array, and FIG.
FIG. 9 is a perspective view showing an alumina substrate, FIG. 10 is a partially enlarged view showing the LED array, and FIG. 11 is a partially sectional perspective view showing the LED array. Fig. 12 (A) is a perspective view showing the state in which the
(B) is a perspective view showing the different states of the holder of the LED array, Fig. 13 (A) and (B) are perspective views showing the different states of the LED array, and Fig. 14 (A>(B) is the other FIG. 15 is a perspective view showing still another embodiment of the LED array; FIG. 16 is a perspective view showing still another embodiment of the LED array; FIG. 17 is a perspective view showing another embodiment of the LED array.
A perspective view showing still another embodiment of the array, FIG.
7, FIGS. 19A, 19B, and 19C are perspective views showing different embodiments of the short throw lens array, and FIGS.
The figure is a perspective view showing another embodiment of the developing device, FIG. 21 is a block diagram showing the control circuit, and FIG. 22 (A) to P)
23 is a plan view showing a copy sheet on which an image other than the original image is formed, FIG. 23 is a partially enlarged view showing the document table, and FIG. 24 is a flowchart. (1)...Copy machine body, (2)...Document stand, (11
)... Copy paper, (13)... Photosensitive drum, (14
>...Short focus lens array, <15)...LED array, (19)...Developing device, <68)...Second microswitch, (71)...Cam. Applicant Sanyo Electric Co., Ltd. Agent Patent Attorney Shizuo Sano 29- Figure 1. 10 to 11 Figure 7. Figure 9 9 Figure 10

Claims (1)

[Scope of Claims] 1. A photoreceptor that moves in a certain direction, means for exposing and scanning a document, and means for projecting and forming an image of the document onto the photoreceptor to form an electrostatic latent image of the document image; In an electronic copying machine that is equipped with means for developing a latent image using toner and means for transferring the toner image onto copy paper, detecting that the exposure scanning means has arrived at a predetermined position. and means for forming an electrostatic latent image of an image other than the original image on the photoreceptor, and the electrostatic latent image of the image other than the original image is transferred to the photoreceptor according to the detection signal. of,
An electronic copying machine characterized in that the electronic copying machine is formed on a portion corresponding to a predetermined position of copy paper. 2. The electronic copying machine according to claim 1, wherein the electrostatic latent image of an image other than the original image is formed after a certain period of time has elapsed from the time when it is detected that the exposure scanning means has arrived at a predetermined position. . 1-