JPS62220979A - Image forming device - Google Patents

Abstract

PURPOSE:To accurately and securely perform erasure at any time by erasing the part outside the external edge of a frame specified by a spot light source at the time of trimming and erasing the part inside the internal edge of the frame specified by the spot light source at the time of trimming. CONSTITUTION:When an operator specifies points S1 and S2 as a range of trimming for an image A on an original G by using operation keys 30a-30d and a position specifying key 30e, the part of the original within the range encircled with the external edges Wb of the frame is copied based on the external edges Wb of the frame W of the range specified by the spot light source, i.e. two points S1' and S2'. Consequently, in case one of plural images is extracted, the image is copied securely without erasing the frame of the image A nor part of the image A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus applied to, for example, an electronic copying machine.

(Prior Art) As is well known, a copying machine has a function of copying an original image directly onto a sheet of paper, or enlarging or reducing the original image to make a copy. Recently, there have also been techniques such as masking, which erases the image within a predetermined area of the document and then copies it, or trimming, which erases the image outside the predetermined area and copies it.
has been developed and put into practical use.

By the way, as a method of specifying the range to be erased, the light source for specifying the erasure range provided at the bottom of the document table is moved to illuminate the original, that is, the transmitted light is used to specify the erasure range. It is now possible to specify. And after this designation.

By moving the light source within the specified range, the erased range is displayed (trace).

However, in the above-mentioned designation of the erasing range, the erasing range is designated using a spot light, but the spot light has a width (thickness) of several mm. For this reason, either select the inner edge of the frame created by the spot light depending on the width of mm, or
By selecting the center of the frame or the outer edge,
The erasure range was different. Although the width of the spot light can be reduced to about 1 mm, it is of no practical use.

In particular, when trying to trim image information in which one stroke is drawn within a frame, if you specify a range according to the frame of the image and extract based on the center or inner edge of the spotlight, There was a problem that the frame of the image was cut off or a part of one image was erased, making it difficult to take out the image cleanly. Also,
If you try to erase one image using the outer edge of the spotlight as a reference from a document with multiple images, that is, there are few gaps between images, if you specify the area outside of that image using the spotlight, other images will be erased. There was a possibility that part of the image would be erased.

(Problems to be Solved by the Invention) As described above, this image forming apparatus eliminates the drawback that errors occur in the erasing range due to the width of the spotlight, and is capable of always performing accurate and reliable erasing. The purpose is to provide

[Structure of the Invention] (Means for Solving the Problems) The image forming apparatus of the present invention includes an indicating means provided in the scanning means and for indicating a predetermined range on a document using a spot light having a predetermined width; It is comprised of an erasing means for erasing from the image carrier an image inside the inner edge of the frame or an image outside the outer edge of the frame produced by the spotlight directed by the instruction means.

(Function) This invention specifies a predetermined range on a document with a spotlight having a predetermined width, and displays an image inside the inner edge of a frame produced by the specified spotlight, or an image outside the outer edge of the frame, as described above. The image is erased from the image carrier.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 2 and 3 schematically show an image forming apparatus of the present invention, such as a copying machine. That is, 1 is a main body of a copying machine, and a document table (general-purpose glass) 2 for supporting a document is fixed to the upper surface of the main body 1. At both ends of the document table 2, there are fixed scales 2z, 2 that serve as standards for setting the document.
Further, near the document table 2, a document cover 11 and a work table 12, which can be opened and closed, are provided.

The original placed on the original table 2 is moved back and forth in the direction of arrow a along the lower surface of the original table 2 by an optical system consisting of an exposure lamp 4 and mirrors 5, 6, and 7. It is designed to be exposed and scanned. In this case, mirror 6.7 moves at half the speed of mirror 5 so as to maintain the optical exposure length. The light reflected from the original by the scanning of the optical system, that is, the light reflected from the original by the light irradiation of the exposure lamp 4, is reflected by the mirror 5.6.7, passes through the variable magnification lens block 8, and then passes through the mirror 9z. ,9
2.93 and guided to the photoreceptor drum 10, and an image of the document is formed on the surface of the photoreceptor drum 10.

The photosensitive drum 10 rotates in the direction of arrow C in the figure, and the surface is first charged by the charging device 11, and then the image is exposed to slit light to form an electrostatic latent image on the surface. This electrostatic latent image is visualized by adhering the toner to it by developing devices 121 and 122 which each contain red or black toner and are selectively operated as required. There is.

On the other hand, the paper (material to be transferred) P is sent out from the selected upper paper feed cassette 131, middle paper feed cassette 132, or lower paper feed cassette 13 through the feed rollers 141, 142, 14.
The sheets are taken out one by one by roller pairs 151, 152, and 153, guided through paper guide paths 16z and 162, 16s to a pair of registration rollers 17, and guided to a transfer section by this pair of registration rollers 17. ing. Here, the above-mentioned paper feeding force Cera 1 to 131, 132.1
33 is removably provided at the lower right end of the main body 1, and either one can be selected on the operation panel described later. In addition, each of the above paper feed cassettes 131
．． 132.13i each has a cassette size detection switch 60! , 602, 603, the cassette size is detected. The cassette size detection switches 601, 602, and 603 are composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes.

The paper P sent to the transfer section comes into close contact with the surface of the photoreceptor drum 10 at the transfer charger 18, so that the toner image on the photoreceptor drum 10 is transferred by the action of the charger 18. . This transferred paper P is transferred to the peeling charger 1
9, it is electrostatically peeled off from the photosensitive drum 10 and conveyed by the conveyor belt 20, and is sent to the fixing roller 521 as a fixing device provided at the end of the conveyor belt 20, where the transferred image is transferred. It will be established. And paper P in the fuser
The sheets are placed on a tray 25 outside the main body 1 by a pair of delivery rollers 22, a sorting gate 23 operated as shown by the solid line, and a pair of discharge rollers 24. After the transfer, the photosensitive drum 10 is returned to its initial state by removing residual toner on the surface with a cleaner 26 and erasing any afterimages with a static elimination lamp 27. Furthermore, 2
9 is a cooling fan for preventing the temperature inside the main body 1 from rising.

On the other hand, a multiple copying unit 28 is provided below the copying machine main body 1 to make it possible to copy both sides of a sheet of paper or to make multiple copies on the same side.

This unit 28 includes a gate 23 for the above-mentioned sorting, a pair of paper discharge rollers 24, and a gate 23 for the above-mentioned sorting.
A plurality of roller pairs 28b and 28C128d are provided to guide the sheets taken in by the stacking section 28a to the stacking section 28a. Further, the stacking section 28a is provided with a delivery roller 28e that sends out the paper temporarily stored in the stacking section 28a. This feed roller 28e is adjusted to the thickness (number of sheets) of the stored paper.
It can be moved up and down as shown by the arrows in the figure.

The paper sent out by the delivery roller 28e is
The sheets are guided to a control gate 28q via a pair of separation rollers 28f that separate and send out the sheets one by one. When multiple copying is to be performed, this control gate 2El is rotated in the direction of arrow M in the figure to guide the paper to the registration roller pair 17 via the transport roller pair 28h and the paper guide path 28i.

Further, when double-sided copying is to be performed, the state shown in the figure is used, and the paper is guided to the reversing section 28 via a pair of conveying rollers 28j. When the paper is stored in the reversing section 28k, the control gate 28g is rotated in the downward direction of the arrow shown in the figure, and the paper sent by the pair of transport rollers 28j is transferred to the pair of transport rollers 28h,
The paper is guided to the registration roller pair 17 via the paper guide path 281. In this example,
The burial gate 28g is always rotated in the direction of arrow M in the figure, and only multiple copies are possible.

FIG. 4 shows the operation panel 30 provided on the main body 1. 301 is a copy key for instructing the start of copying; 302
is a display section consisting of, for example, a liquid crystal dot matrix display, and display information stored in a memory 140, which will be described later, is switched and displayed in accordance with each mode. Around this display section are selection keys 31a, 31b, 31c131d, 31 for selecting the mode displayed on this display section 302.
E, 31 f, 31 o, and 31 h are provided.

Further, the operation panel 30 includes operation keys 30a and 3 for moving a spot light source that indicates the erase position of the document, which will be described later.
0b, 30c, 30d, and a position designation key 30e for inputting the coordinate position indicated by the spot light source.

As shown in FIGS. 5(a) and 5(b), the display unit 302 displays the device status M, etc. in text, and as shown in FIG. 5(C), trimming, masking mode, image movement, etc. The selection screen for mode, edge erase mode, multiple copy mode, two original copy mode, multicolor copy mode, multiple copy mode, and centering mode can be graphically displayed. As shown in FIG. 2, a screen for selecting whether there are 1 or 2 originals in edge mode, a setting screen for the number of copies, a selection screen for the copy IR rate, and a screen for the copying status are graphically displayed.

FIG. 6 shows a drive Ill for reciprocating the optical system.
This shows that. That is, the mirror 5 and the exposure lamp 4
The first KiP Ritsuji 41! The mirrors 6, 7 are respectively supported by second carriages 422, and these carriages 411, 412 are guided by guide rails 421, 422 and are movable in parallel in the direction of arrow a. That is, 4
The phase pulse motor 33 drives the pulley 43. An endless bell 1-4 is provided between the pulley 43 and the fiddle pulley 44.
5 is stretched around the belt 45, and one end of a first carriage 411 that supports the mirror 5 is fixed to the middle part of the belt 45. On the other hand, the second carriage 4 supporting the mirror 6.7
Two pulleys 47.47 are rotatably provided on the guide portion 46 of the rail 422 and spaced apart in the axial direction of the rail 422, and a wire 48 is stretched between these pulleys 47.47. One end of this wire 48 is fixed to a fixed part 49, and the other end is fixed to the fixed part 49 via a coil spring 50. Further, one end of a first carriage 411 is fixed to a midway portion of the wire 48. Therefore, as the pulse motor 33 rotates, the belt 4
5 rotates, the first carriage 411 moves, and the second carriage 422 also moves accordingly. At this time,
Since the pulleys 47 and 47 serve as movable pulleys, the second carriage 422 is 1. /2
move in the same direction at a speed of Note that the moving directions of the first and second carriages 411 and 412 are controlled by switching the rotation direction of the pulse motor 33.

Further, the first V-rig 411 is moved to a predetermined position (home position according to the magnification) by driving the motor 33 according to the paper size and magnification. Then, when the copy key 30+ is pressed, the first
The carriage 411 is first moved toward the second carriage 412, and then the lamp 4 is turned on and moved away from the second carriage 412. When scanning of the original is completed, the lamp 4 is turned off and the first carriage 41r
is returned to the home position.

FIG. 7 shows the overall control circuit.

The main control unit 71 includes an operation panel 30 and various switches and sensors, such as the cassette size detection switch 60z.
, 602, 603, etc., and detects input from an input device 75, and drives the various chargers.
the static elimination lamp 28, the blade solenoid 27a of the cleaner 27, the heater 23a of the fixing roller pair 23,
Controlling the exposure lamp 4, motor 33, etc.,
In addition to performing the above-described copying operation, the spot light source 131,
It controls the pulse motor 33, 135, memory 140, erasing array 150, array drive unit 1, 60, etc. to erase unnecessary portions of the document. In addition, a spot light [131, a pulse motor 135, an erasure array 150
, the array driver 160, and the memory 140 will be described later.

Further, the main III m section 71 displays characters and patterns on the display section 302 for each mode in accordance with character information or pattern information stored in a memory (not shown). A quick disk or the like may be used as the memory.

The exposure lamp 4 is connected to the exposure lamp 1 via a lamp regulator 81.
21111111 section 71, and the heater 23a is controlled by the main control section 71 via the heater control section 82.

Next, the document image erasing means will be explained.

8 and 9, the first carriage 4''11 is provided with a guide shaft 130 along the lamp 4 in a portion where the light of the lamp 4 is blocked, and this guide shaft 130 is provided with a guide shaft 130 for erasing originals. Spot light source 13 as a means for indicating a range
1 is movably provided. This spot light ff1
The reference numeral 131 includes a light emitting element 132 such as a light emitting diode or a lamp, which is provided opposite to the document table 2, and a lens 133. It is designed to be irradiated as a spot light.

Further, the spot light source 131 is connected to a timing belt (toothed belt) 134 disposed on the guide shaft 130 . This timing belt 134 is passed between a pulley 136 provided on the rotating shaft of a pulse motor 135 and a driven pulley 137. Therefore, by rotating the pulse motor 135, the spotlight rA
131 is moved in a direction perpendicular to the scanning direction of the first carriage 411. Further, the first carriage 411 located at the end of the guide shaft 130 on the pulse motor 135 side is provided with a position sensor 138 consisting of a microswitch that detects the initial position of the spotlight 1 [1131]. For example, when the spot light source 131 is moved, the spot light source 131 first comes into contact with the position sensor 138 and its initial position is detected.

Next, a method for specifying the erasing range of a document using the spot light source 131 will be described with reference to FIGS. 10 to 12. When specifying the erasing range of a document, the document G is set with the copy side facing down on the fixed scale 21 side, as shown in FIG.

In this state, when the operation keys 308 to 30d are operated, the spot light source 131 is moved with the light emitting element 132 turned on. That is, when the operation keys 30b and 30d are pressed, the motor 33 is driven, and the first carriage 411 and the spot light source 131 are moved in the scanning direction (arrow y direction shown in FIG. 10). In addition, the operation keys 30a, 30
When c is pressed, the motor 135 is driven and the spot light source 1
31 is perpendicular to the scanning direction (arrow X shown in FIG.
direction).

When specifying 1-rimming mode, the operator presses the operation keys 30a to 30 while visually observing the spot light transmitted through the document G.
For example, by operating S on the document G shown in FIG. 11(a),
With the spotlight moved to one point, press the position specification key 30e.
Press. Then, the coordinate position specified by this S1 point is stored in the main control section 71 shown in FIG. Similarly, Hara I
When the position designation key 30e is pressed with the spotlight moved to the 82 points of G, the positions of the 82 points are stored in the main control section 71. The position of this spot light is controlled by a pulse motor 33, for example.
．． This can be detected by counting the number of 135 drive pulses. After this, as shown in FIG. 11(a),
Outer edge wb of frame W formed by 81 points and 82 points
A rectangular area (indicated by diagonal lines) having diagonal points 81 and 82' is designated as the erase gap.

In addition, when specifying the masking mode, the operator specifies points 83 and 84 of the original mG as shown in FIG. , S4, a portion other than the square having one diagonal point is designated as the erasing range. In this way, when the erasing range is designated, the main controller 71 performs calculations based on the positions of the two designated points and the copying magnification, and the memory 140 stores a high level signal "1" in the erasing range. , a low level signal IIO11 is stored in the other portions. That is, this memory 140 is constituted by, for example, a RAM whose capacity in each column direction is approximately equal to the movement distance of the spot light source 131 in the X direction divided by the position resolution in the y force direction.
According to the data supplied from the main control unit 71, as shown in FIG.
In the case of a), as shown in Fig. 12(a), and in the case of Fig. 11(b), as shown in Fig. 12(b), the address corresponding to the shaded area is highlighted. level signal,
Low level signals are stored at other addresses.

The document G for which the erasure range has been specified as described above is
It is reversed in the y direction shown in FIG. 10, and set on the fixed scale 21 side, with the copy side facing down, and copied. Therefore, in this state, the original image and the erased data stored in the memory 140 are associated with each other.

On the other hand, as shown in FIG. 13, an erasing array 150 serving as erasing means is provided close to the photosensitive drum 10, for example, between the charger 11 and the exposure section Ph. As shown in FIGS. 14 and 15, this erasing array 150 has multiple rounds of light shielding cells 151 arranged in a direction perpendicular to the rotational direction of the photoreceptor drum 1o, and inside each of these light shielding cells 151. A light emitting element 152 made of a light emitting diode, for example, as shown in FIGS. 16(a) and 16(b) is provided. Furthermore, a lens 153 is provided in the opening of each cell 151 facing the photoreceptor drum 10 to focus the light from the light emitting element 152 onto the surface of the photoreceptor drum 10 . The number of light emitting elements arranged in the erasing array 150 matches, for example, the capacity of the memory 140 in the column direction. Here, the distance between the light emitting elements 152 is P, and the number of countries is N1.
1iil, the total length of the erase array 150 is Q-NXP
becomes.

The erase array 150 is driven by the array driver 160 described above. As shown in FIG. 17, this array driving section 160 includes a shift register 161 having the same number of bits as the number of bits in the column direction of the memory 140, and a store register 1 in which the contents of this shift register 161 are held.
62, it is constituted by a switch circuit 164 consisting of a plurality of switch elements 163 that are controlled on and off by each output signal of this store register 162, the movable contacts 163a of these switch elements 163 are grounded, and the fixed contacts 163b are grounded. Each of the light emitting elements 152 constituting the erasing array 150 is connected to each cathode. The anode of each of these light emitting elements 152 is connected to i! through a current limiting resistor R, respectively. [Connected to Vcc.

After specifying the erase range of the original as described above, when the original cover 11 is closed and the copy key 301 is pressed, the first carriage 41! As the photosensitive drum 10 is operated, one column of data is sequentially read out from the memory 140 in the row direction (as shown in FIG. 12). This read data DI is transferred to the shift[- register 161 of the array driving section 160 in response to the clock signal CLK.

After one column of data is transferred to the shift register 161, the charged portion of the photoreceptor drum 10 is transferred to the erase array 15.
When it reaches 0, the main controller 71 outputs a latch signal L T
I-1 is output, and shift register 1 is output according to this signal.
61 storage data is supplied to store register 162. That is, since the erasing array 150 is arranged between the charger 11 and the exposure section Ph, one column of data outputted from the memory 140 is generated when the angle between the erasing array 150 and the exposure section Ph is θ1, for example. Assuming that the photosensitive drum 10 is rotating at each speed, the output timing of the latch signal LTH is controlled so that it is supplied to the store register 162 before θ1/ω.

Each switch element 163 of the switch circuit 164 is controlled by the output signal of the store register 162. That is, when the output level of the store register 162 is high level, it is turned on, and when it is low level, it is turned off. As a result, the light emitting elements 152 connected to each switch element 163 are turned on when the switch element 163 is on, and are turned off when the switch element 163 is off. Therefore, among the charged parts of the photoreceptor drum 10, the part where the light emitting element 152 is turned on is charge-free, and even if the charge-free part is exposed afterwards, no electrostatic latent image is formed, and the original image is not erased. It means that it was done. Thereafter, the data in the memory 140 is read out one column at a time in the same manner, and the image is erased.

Next, the copying operation of the present invention in the above configuration will be explained with reference to the flowchart shown in FIG. For example, in the mode designation state (STI) shown in FIG. 5(C), the operator selects the trimming or masking mode by pressing the selection key 31a (ST2). Then, a trimming and masking selection screen is displayed for the selection keys 31a and 31b, as shown in FIG. 18(a), and a pattern of the document frame and the specified range (pattern frame) is displayed (ST3).
. In response to this display, the operator selects trimming by pressing the selection key 31a (ST4). At this time, as shown in FIG. 18 (1)), the display unit 302 flashes a mark corresponding to trimming and displays the inside of the pattern frame to display 1 to rimming (ST5). ).

Next, the operator turns over the original mg on which a plurality of images as shown in FIG.
(ST6). Next, the operator presses the operation keys 30a-3.
0d and the position designation key 30e, select 81 points and 8 as the trimming range for the image A on the document G.
2 points (ST7). Then, the outer edge W of the frame W of the range specified by the spot light source 131
The control unit 71 performs calculations based on the positions of two points b, that is, one point Sl and one point S2, and the calculation is performed in the memory 140.
As shown in Fig. 12 (a), a high level signal ``1'' is applied to the erase area and a low level signal is applied to the other areas.
In other words, a high level signal is stored at an address corresponding to the outside from the outer edge wb of the frame W produced by the spot light source 131, and a low level signal is stored at an address corresponding to the inner side from the outer edge Wa of the frame W produced by the spot light source 131. The signal is stored (ST8).

In this state, when the copy key 301 is turned on, a copying operation of a portion of the original G corresponding to the image is performed using the copying device 121 containing black toner and the erasing array 150. That is, the first carriage 411 is moved and exposure scanning of the original G is performed (ST9).

Along with this, the array drive section 160 includes the memory 140.
Erasing data is supplied from S, and the erasing array 150 is operated according to this erasing data, so that the charges on the portion outside the outer edge wb of the frame W are erased from the photoreceptor drum 10 (S
TIO). Therefore, when this image is developed and transferred, the paper P has a frame W of the original G as shown in FIG.
Only the portion of the range surrounded by the outer edge wb of is copied.

As a result, when extracting one image from among multiple images, the frame of image @A will not disappear or part of image mA will not be erased, and the copy will be reliably reproduced. It is now possible to do so.

Further, when the trimming and masking selection screen shown in FIG. 18(a) is displayed, the operator presses the selection key 3.
Select masking by immersing 1b (S
T11). At this time, the display section 302 (Fig. 18 (C)
), a masking display is performed by flashing a mark corresponding to masking and displaying the outside of the pattern frame (ST12).

Next, the operator turns over the original IG on which images of a plurality of items are written as shown in FIG.
(ST13). Next, use the operation keys 30a to 30d and the position designation key 30e to set 8 as the masking range for the image B on the document G.
3 points and 84 points are specified (STi4). Then, the control unit 71 performs Korean performance based on the positions of the inner edge Wa of the frame W in the range specified by the spotlight 1131, that is, one point S3 and one point S4. As shown in FIG. 12(b), a high level signal ``1P'' is stored in the erasing range portion, and a low level signal ``O°'' is stored in the other portions.

In other words, the inner edge wb of the frame W by the spot light i1!131
A high level signal is stored at an address corresponding to the inside from the spot light source 131, and a low level signal is stored at an address corresponding to the outside from the inner edge Wa of the frame W formed by the spot light source 131 (S
T15).

In this state, when the copy key 301 is turned on, the f! 15121 and the erasure array 150, the ii! A copying operation of the portion corresponding to j@B is performed. That is, the first carriage 41+ is moved and exposure scanning of the original G is performed (
ST16).

Along with this, the array drive section 160 includes the memory 140.
Erasing data is supplied from the photoreceptor drum 1o, and the erasing array 150 is operated according to this erasing data, and the charges on the inside of the inner edge Wa of the frame W are erased from the photosensitive drum 1o (S
T17). Therefore, when this image is developed and transferred, the paper P has a frame W of the original G as shown in FIG.
Only the portion other than the area surrounded by the inner edge Wa is copied.

As a result, when erasing the picture @B in the front, only the picture @B is erased without erasing the lines on the front, so that the copy can be made reliably.

As mentioned above, when trimming, the outside of the frame created by the spot light source is erased, and when masking, the inside of the frame created by the spot light source is erased, so the image drawn inside the frame is When you try to trim information, the frame of the image will not be cut off or part of the image will not be deleted, and you can extract the information cleanly. If you try to delete one image from a document that doesn't exist much,
Copies can be made without erasing parts of other images.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide an image forming apparatus that can always perform accurate and reliable erasing.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a flowchart for explaining trimming and masking operations, FIG. 2 is an external perspective view of the image forming apparatus, and FIG. 3 is a side sectional view of the image forming apparatus. Figure 4 is a plan view showing the configuration of the operation panel, Figure 5 is a diagram showing an example of the display section, Figure 6 is a perspective view schematically showing the drive mechanism of the optical system, and Figure 7 is the overall view. FIG. 8 is a perspective view of the main parts of the spot light source, FIG. 9 is a side sectional view of the main parts of the spot light source, and FIGS. 10 and 11 are the main parts of the spot light source. 12 is a plan view shown to explain the erasing range specification operation of the original used, FIG. 12 is a diagram shown to explain the contents of the memory, FIG. Figures 14 and 15 show the relationship between the erasing array and the photosensitive drum, respectively. Figure 14 is a perspective view showing only the main parts, Figure 15 is a front view showing only the main parts, and Figure 16 is a front view showing only the main parts. The configuration of the erasing array is shown in FIG.
Figure 7 is a circuit diagram showing the configuration of the array drive unit, Figure 18 is a diagram showing an example of display on the display unit during trimming and masking, Figure 19 is a diagram showing an example of a document to be trimmed, and Figure 20 is a diagram showing trimming. FIG. 21 is a diagram showing an example of a manuscript on which masking has been performed, and FIG. 22 is a diagram showing an example of a copy of paper on which masking has been performed. DESCRIPTION OF SYMBOLS 1...Main body, 2...Document stand, 10...Photosensitive drum, 30...Operation panel, 302...Display section, 30
a to 30d...operation key, 30e...position designation key, 31a to 3'1h...selection key, 33...pulse motor, 71...main control unit, 131...spot light source, 135...Pulse motor, 140...Memory,
150... Erasing array, 160... Array drive unit,
P... Paper, Ph... Exposure section, W... Frame, Wa...
...Inner edge of the frame, wb...Outer edge of the frame. Figure 2 JIJ Figure 4 Figure 5 (a) Figure 5 (b) Figure 5 (C) Figure 5 (d) Figure 5 (e) Figure 5 (f) Figure 5 (9) Figure 8 Figure 10 Figure 11 (a) Figure 11 (b) Figure 12 (a) Figure 12 (b) Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 (a) Figure 18 (b) Figure 18 (C) Figure 19 Figure 20 Figure 21 Figure 22

Claims (2)

[Claims] (1) A scanning device that optically scans a document placed on a document table; an optical system that forms an optical image obtained by the scanning device onto a charged image carrier; and the image carrier. In an image forming apparatus, the image forming apparatus includes a developing means containing a developer for developing an image formed on a body, and a transfer means for transferring the developed image onto a transfer material, the image forming apparatus being provided in the scanning means, an indicating means for indicating a predetermined range in the area using a spotlight having a predetermined width; An image forming apparatus comprising an erasing means for erasing an image from an image carrier. (2) The erasing means erases an image inside the inner edge of the frame caused by the spotlight when erasing within a predetermined range, and erases an image outside the outer edge of the frame caused by the spotlight when erasing outside the predetermined range. The image forming apparatus according to claim 1, wherein the image forming apparatus erases the image.