JPS61215568A - Image forming device - Google Patents

Abstract

PURPOSE:To erase an optional part in an original image and to underscore it by drawing a line to specific width at a specified part by using a multiple copying function for an original, a function for specifying the optional range of the original, and a function for erasing images inside and outside the specified range. CONSTITUTION:The original is set on an original platen 2 and an underscore specifying key 30h is pressed to place a main processor group in underscore specified mode. Then, a part to be underscored is specified on the original by operating operation keys 30a-30d and a position specifying key 30e and then an exposure lamp 4 is turned on to perform copying operation. When the copying operation is completed, a multiple copying unit 602 is operated and a form on which the original image is formed is sent to the side of a photosensitive drum 10 again. Then, light emitting elements outside the specified range turns on and light emitting elements 152 corresponding to the specified range and the exposure lamp 4 turn off; and an electrostatic latent image formed on a photosensitive drum 10 is developed by a developing device 12 and transferred to and fixed on the fed paper as an underscore L.

Description

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

[Technical background of the invention and its problems]

Generally, an electronic copying machine has the function of copying an original image onto paper as is, or enlarging or reducing the original image and making a copy.

Incidentally, a document image may include unnecessary parts or parts that should be enlarged or reduced. However, conventional copying machines cannot partially erase, enlarge, or reduce the original image for copying, and furthermore, cannot add underlines to necessary portions.

[Purpose of the invention]

This invention has been made based on the above circumstances, and its purpose is to be able to selectively erase any part of a document image, and to form a line of a predetermined width in a required part. The present invention aims to provide an image forming apparatus that can perform the following functions.

[Summary of the invention]

The present invention forms an underline in a designated area by using, for example, a function of multiple copying of a document, a function of specifying an arbitrary range of a document, and a function of erasing images within and outside the specified range.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

5 and 6 schematically show an image forming apparatus, such as a copying machine, according to the present invention.

That is, 1 is a main body of a copying machine, and a document table (transparent glass) 2 is fixed to the upper surface of the main body 1 to support a document. This document table 2 is provided with fixed scales 21 + 22 that serve as a reference for setting documents, and furthermore, a document cover 11 that can be opened and closed and a work table 1 are provided near the document table 2.
2 is provided. The original set on the original platen 2 is moved back and forth by an optical system consisting of an exposure rung 4 and mirrors 5 and 6°1 that reciprocates along the lower surface of the original platen 2 in the direction of arrow a. It is designed to be exposed and scanned. In this case, mirror 6.1 moves at half the speed of mirror 5 so as to keep the optical path length constant. The light reflected from the original by the scanning of the optical system and the light reflected from the original by the light irradiation of the thumb exposure lamp 4 are reflected by the mirror 5.6.7 and then passed through the variable magnification lens 8. , and is further reflected by mirror 9 and guided to photoreceptor drum 10 , so that an image of the document is formed on the surface of photoreceptor drum 10 .

The photosensitive drum 10 rotates in the direction of arrow C, and its surface is first electrified by a plaster charger 11, and then the original image is exposed to light to form an electrostatic latent image. The electrostatic latent image is made visible by applying toner by a developing device 12. On the other hand, the paper (image-forming object) P is taken out one by one from the selected upper paper feed cassette 13 or lower paper feed cassette 14 by the feed roller 15 or 16, and is taken out one by one by the paper guide path 17.
Alternatively, it is guided to a pair of resolution rollers 19 through rollers 18, and sent to a transfer section by this pair of rollers 19. Here, each of the paper feed cassettes 13 and 14 is
It is detachably provided at the lower right end of the main body 1, and has an operation IJ? which will be described later. You can select either one in the channel. In addition, each of the above paper feed cassettes 13.1
4 are cassette size detection switches 601 and 6, respectively.
0. The cassette size is detected by

The detection switch 602 is composed of a plurality of microswitches that are turned on and off in accordance with the insertion of cassettes of different sizes.

On the other hand, the paper P sent to the transfer section comes into close contact with the surface of the photoreceptor drum 10 at the transfer charger 20, so that
The toner image on the photosensitive drum 10 is transferred by the action of the charger 20. The transferred paper P is peeled off from the photoreceptor drum 10 by the action of the peeling charger 21 and conveyed on the conveyor belt 22, and sent to a pair of fixing rollers 23 as a fixing device provided at the terminal end of the conveyor belt 22. By passing through this, the transferred image is fixed. Then, the paper P after fixing is
The tray 2 outside the main body 1 is
It is designed to be discharged at 5. Further, after the photosensitive drum 10 has been transferred, the charge is removed by the charger 26, residual toner on the surface is removed by the cleaner 27, and the afterimage is erased by the charge removal lamp 28, so that the drum 10 returns to its initial state. ing. Note that 29 is a cooling fan for preventing a rise in temperature within the main body 1.

Furthermore, a multiple copying unit 603 is provided at the bottom of the main body 1, which is used during editing and copying, which will be described later. This multiple copy unit 60. is to return the paper sent out by the pair of paper discharge rollers 24 to the pair of registration rollers 19 in order to make further copies on the same side of the paper that has already been copied. That is, inside the multiple copying unit 603, a gate 605 is provided between the pair of paper discharge rollers 24 and 604 for sorting the paper. This distribution f-toro 0s
is in the state shown by the solid line during normal copying, and is operated as shown by the dotted line during editing copying to guide the paper sent out by the pair of paper ejection rollers 24 between the conveyor belts 6'a*601. ing. These conveyor bells) 60
g+607 is for holding and conveying the paper and guiding it into the guide path 608.The paper introduced into this guide path 603 is sent to the photosensitive drum 10 again in synchronization with the optical system. ing.

FIG. 7 shows the operating channel 30 provided on the main body 1. 301 is a copy key for commanding the start of copying; 30
2 is a numeric keypad for setting the number of copies, etc.; 303 is a display unit for displaying the operating status of each part, paper jam, etc.; 30
4 is a cassette selection key for selecting upper and lower paper feed cassettes 13 and 14; 30. 306 is a magnification setting key for setting the enlargement/reduction magnification of copying in a predetermined relationship; 307 is a zoom key for steplessly setting the enlargement/reduction magnification; 308 is a setting 30. a display unit that displays the magnification; 30*, 30b, 30c, and 30d are operation keys for moving a spot light source that indicates the erase position of the original, which will be described later. 30e is a position specifying key for inputting the coordinate position indicated by the spot light source. , 30f.

Reference numeral 30g indicates an erasure range specification key for specifying the erasure range at each designated position, and 30h indicates an underline specification key for specifying the formation of an underline on the paper on which the image has been formed.

FIG. 8 shows an example of the configuration of a drive source for each drive section of the copying machine configured as described above, and is composed of the following motors. That is, 31 is a lens motor, which is a motor for moving the position of the lens block 8 for changing the magnification. A mirror motor 32 is a motor for changing the distance (optical path length) between the mirror 5 and the mirror 6.7 for changing the magnification. 33
is a scanning motor, which includes the exposure lamp 4 and the mirror 5;
This is a motor for moving the mirror 6.7 for scanning the original. A shutter motor 34 is a motor for moving a shutter (not shown) for adjusting the charging width of the photosensitive drum 10 by the charger 11 during zooming. A developing motor 35 is a motor for driving the developing roller of the developing device 12 and the like. A drum motor 36 is a motor for driving the photosensitive drum 10. 37 is a fixing motor that connects the paper conveying path 22, the pair of fixing rollers 23, and the paper discharge row g-! P-&
Mj<-W764. +141A, njJ-y@-1! ,
Lqn is a paper feeding motor, which is a motor for driving the delivery rollers 15 and 16. Reference numeral 39 denotes a paper feed motor, which is a motor for driving the registration roller pair 19. 40 is a fan motor, which is a motor for driving the cooling fan 29, and 401 is a conveyor belt.
*This is a motor for driving 607.

FIG. 9 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure rung 4 are supported by the first carriage 411K, and the mirror 6.7 is supported by the second carriage 412, respectively, and these carriages 411°41□ are guided by guide rails 421+422 and move in parallel in the direction of arrow a. It is free. That is,
A four-phase pulse motor 33 drives a pulley 43. An endless belt 4 is connected between this pulley 43 and the idler pulley 44.
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 412 supporting the mirror 6.7
Two pulleys 47° 47 are rotatably provided on the guide portion 46 of the rail 422, spaced apart in the axial direction of the rail 422, and a wire 48 is stretched between these pulleys 47, 47. There is.

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, a first carriage 41. One end is fixed. Therefore, when the armpit motor 33 rotates, the belt 45 rotates, the first carriage 411 moves, and the second carriage 412 also moves accordingly. At this time, pulley 4
7. Since 47 acts as a movable pulley, the first carriage 4
11, the second carriage 412 moves in the same direction at a speed of 172. In addition, the first and second carriers,
The moving direction of 1r4'2 is controlled by switching the rotational direction of the i4 motor 33.

Further, on the document table zFC, a copyable range corresponding to the specified paper is displayed. That is, the paper selection key 304
The paper size specified by (Px, Py)
and magnification setting key 308, JO.

If the copy magnification specified by is K, then the copyable range (X, 7) is x=Px/K y = Py/K. Of this copyable range (X # y),
The direction is indicated by pointers 51 and 52 provided on the back surface of the document table 2, and the y direction is indicated by a scale 53 provided on the upper surface of the first carriage 411.

The above guidelines 51 and 52 are as shown in Figure 10.
54 and 55 via a spring 56.

The pulley 55 is rotated by a motor 58, and by driving the motor 58 according to the paper size and magnification, the distance between the pointers 51 and 52 can be changed. There is.

Further, the first carriage 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 301 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, rung 4 is turned off and the first
The carriage 411 is returned to the home position.

FIG. 11 shows the overall control circuit, which is mainly composed of a main processor group 71 and first and second sub-processor groups 72 and 73. The main processor group 71 is
The operation panel 30 and various switches and sensors, such as the cassette size detection switch 5 (71r 6 '2
a high-voltage transformer 76 that detects input from an input device 75 such as, and drives the various chargers; the static elimination lamp 28;
The platen lenoid 27a1 of the cleaner 27, the heater 23a5 of the pair of fixing rollers 23, the exposure run f4, and each of the motors 31-4o, 5B, 67.77, etc. are controlled to perform the above-described copying operation, and the spot light source 131, Δsis motor 135, erasure array 150,
It controls the array drive unit 160, memory 140, etc. to erase unnecessary portions of the document.

Note that the spot light source 131, pulse motor 135, erasing array 150, array driving section 160, and memory 140 will be described later.

Among the motors 31 to 40.58, motor J 5 j
The toner motor 77 that supplies toner to the J7 #40t 401 and the developing device 12 is connected to the motor driver 7.
The motors 31 to 34 and 67° 135 are controlled by a first subprocessor group 72 via a pulse motor driver 79,
The motors 36, 39, 38, 511 are controlled by the second sub-processor group 73 via a pulse motor driver 80. Further, the exposure run f4 is controlled by the main processor group 71 via the lamp regulator 81, and the heater 231
is controlled by the main processor group 71 via the heater control section 82.

Then, commands to drive and stop each motor are sent from the main processor group 71 to the first and second sub-processor groups 72.73, and instructions to drive and stop each motor are sent from the first and second sub-processor groups 72.73 to the main processor group 71. A status indicating whether the motor is running or stopped is sent. Further, the first sub-processor group 72 receives position information from a position sensor 83 that detects the initial position of each of the motors 31 to 34 and 67.135.

FIG. 12 shows an example of the configuration of the main processor group 71. That is, numeral 91 is a one-chip microcomputer (hereinafter simply referred to as microcomputer) which, through an input/output port 92, performs key force detection on an operation panel (not shown) and various display controls. Also, microcomputer 91
is expanded by input/output ports 93-96. The input/output port 93 is connected to the high voltage transformer 76, the motor driver 78, the lamp regulator 81, and other outputs, and the input/output port 94 is connected to a size switch for detecting paper size and its individual inputs.
A copy condition setting switch and its respective inputs are connected to the input/output port 95. Note that the input/output port 96 is for an option.

FIG. 13 shows an example of the configuration of the first sub-processor group 72. That is, 101 is a microcomputer connected to the main processor group 71. 102 is a programmable interval timer for controlling the phase switching interval time of the Nockles motor, which counts based on a set value set by the microcomputer 101;
When the count is out, an end signal is output to the interrupt line of the microcomputer 101. The reference clock and pulse are input to the timer 102. Further, the microcomputer 10 receives position information from the position sensor 83 and is connected to input/output ports 103 and 104.

The input/output port 104 is connected to the motors 31 to 34, 67, 13 via the pulse motor driver 79.
5 is connected. The input/output/output port 1os is used, for example, when outputting status signals of each pulse motor to the main processor group 71.

FIG. 14 shows an example of the configuration of the second sub-processor group 73. That is, 111 is a microcomputer, which is connected to the main processor group 7. Numeral 112 is a programmable interval timer for controlling the phase switching interval of the pulse motor.When a set value is set by the microcomputer 111, it counts based on the set value, and when it has counted out, it outputs an end reference pulse.

This ending no J? Luz crawls, is latched by the child circuit 113,
Its output is supplied to the interrupt line and input/output board input line of the microcomputer 111. Further, an input/output port 114 is connected to the microcomputer 111, and motors 36.degree. 3B, 39.58 are connected to this input/output port 114 via the pulse motor driver 80.

Fig. 15 shows the control circuit of the motor.
104, 114) is connected to the 4th motor driver i4zz;t (corresponding to the 1st motor driver 79.80), and this A? The pulse motor driver 122 is connected to a pulse motor 123 (the pulse motor 31 to 34° 36.3g, 39.5B, 67.13
Each of the windings A, A, B, and 100 (equivalent to 5) are connected.

Figure 16 shows the speed control method of a pulse motor.
The figure (a) shows the speed curve of the Nolles motor, and the figure (b) shows the phase switching interval. As is clear from this figure, the phase switching intervals are long at the beginning, gradually shorten, eventually become equal intervals, gradually become longer again, and then stop. That is,
This indicates the through-up and through-down of the pulse motor, which starts from the self-starting region, starts up, is used in the high-speed region, and then eventually falls down. In addition, tl r t2・
...tx indicates the time of the phase switching interval.

Next, the document image erasing means will be explained.

In Figures 17 and 18, the first gear IJ Tsuji 41
1 is provided with a guide shaft 130 along the lamp 4 in the part where the light of the lamp 4 is blocked, and this guide shaft 130
A spot light source 131 is movably provided as means for indicating the erasing range of the original. This spot light source 131 is, as shown in FIG.
32 and a lens 133, the light emitting element 132tl
The light generated by C is transmitted through the lens 133 to the document table 2
It is designed to be irradiated as a light beam with a diameter of 100 mm. This spot light has a brightness that allows it to pass through the original G set on the original platen 2, for example, as thick as a postcard. Further, the spot light source 131 is connected to a timing belt (toothed belt) 134 disposed along the guide shaft 130.
is connected to. This timing belt 134 is passed between a pulley 136 provided on the rotating shaft of a notarus motor 135 and a driven pulley 137. therefore,
) 4 pulse motor 135 is rotated, the spot light source 131 is moved to the first carriage 41. is moved in a direction perpendicular to the scanning direction. Further, a position sensor 138 consisting of a microswitch that detects the initial position of the spot light source 131 is provided in the first carriage 411 located at the end of the guide shaft 130 on the pulse motor 135 side. In this case, the spot light source 131 first comes into contact with the position sensor 138 to detect the initial position.

Next, a method for specifying the erasing range of a document using the spot light source 131 will be described with reference to FIGS. 19 to 21. This spot light source 131 is moved by operating the aforementioned operation keys 30a to 30d. That is, when the operation keys 30b and 30d are pressed, the motor 33 is driven, and the first gear, the gear 411, and the spot light source 13 are driven.
1 is moved in the scanning direction (direction of arrow X shown in FIG. 19). In addition, operation keys 30&.

When 30c is pressed, the motor 135 is driven, and the spot light source 131 is moved in a direction perpendicular to the scanning direction (in the direction of arrow X shown in FIG. 19).

The operator operates the operation keys 30h to 30d while visually viewing the spot light transmitted through the document G, and presses the position designation key 30m after moving the spotlight to point S1 on the document G shown in FIG. 20, for example.

Then, the coordinate position specified by S is stored in the main processor group 71 shown in FIG.

Similarly, when the position designation key 306 is pressed with the spotlight moved to 82 points on the document G, the position of point S2 is stored in the main processor group 71. The position of this spot light can be detected, for example, by counting the number of driving t4 pulses of the pulse motors 33, 135. After this,
When the erasure range designation key 30f is pressed, a rectangular area (indicated by diagonal lines) with 82 points as diagonal points is designated as the erasure range (81r) as shown in FIG. 20(a).

In addition, as shown in Fig. 20(b), there are 83 manuscript GO points and 84 manuscript GO points.
Specify a point and press the erase range specification key sog, 83
* The area other than the square with 84 diagonal points is designated as the erasing range. In this way, the erasure range specification key 30
1. When 30g is pressed, calculations are performed in the main processor group 71 based on the positions of the two specified points, and the
In z4°, a high level signal ""1#" is stored in the erase range part, and a low level signal ""O" is stored in the other part.

That is, in this memo I7140, for example, the capacitance in each column direction is approximately equal to the movement distance in the X direction of the spot light source 131 divided by the position resolution in the X direction, and the capacitance in each row direction is approximately equal to
31, the movement distance in the X direction divided by the position resolution in the y and X directions is approximately equal to 7'? , RAM, and data supplied from the main processor group 71
In the case of Fig. 0 (a), as shown in Fig. 21 (a), and in the case of Fig. 20 (b), as shown in Fig. 21 (b)
As shown, high level signals are stored in addresses corresponding to the shaded areas, and low level signals are stored in other addresses.

In this case, the original is set with the copy side facing up, and after the erasure range is specified, it is turned over along the fixed scale 2□ of the original table 2.

Therefore, the information stored in the memory 140 shown in FIG. 21 is also actually stored inverted in the column direction.

On the other hand, as shown in FIG. 22, an erasing array 150 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. 23 and 24, this erasing array 150 includes a plurality of light shielding cells 1 in a direction perpendicular to the rotation direction of the photoreceptor drum 100.
51 are arranged, and inside each of these cells 151, as shown in FIGS. 25(a) and 25(b), a light emitting element 152 made of, for example, a light emitting diode 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 . This erase array 1
The number of light emitting elements arranged in the memory 14 is, for example,
It is matched with the column direction capacitance of 0. Therefore, if the distance between the light emitting elements 152 is P and the number is N, the total length of the erasing array 150 is Q=NXP.

The erase array 150 is driven by the array driver 160 described above. As shown in FIG. 26, 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 16 in which the contents of this shift register 161 are held.
2. A plurality of switches controlled on and off by each output signal of the store register 162.

The movable contact piece 16 of the switch element 163
3a is grounded, and fixed contacts 163b are connected to light emitting elements (light emitting diodes) 152 constituting the erasing array 150, respectively.
connected to each cathode. Each of these light emitting elements 15
The two anodes are connected to the power supply Vcc through current limiting resistors R, respectively.

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 411 and the photosensitive drum 10 are operated, and the memo 140 is Data for one column is sequentially output in the row direction (shown in FIG. 21). This read data D1 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 has been transferred to the shift register 161,
The charged portion of the photoreceptor drum 1o is an erase array 150.
When the main processor group 71 outputs the silatch signal LTH, the shift register 1
The contents of 61 are 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 output from the memory 140 is, for example, arranged between the erasing array 150 and the exposure section ph.
Assuming that the angle h is 01 and the photosensitive drum 1o is rotating at an angular velocity ω, 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 each output signal of this store register 162. In other words, when the output signal 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 element 152 connected to each switch element 163 is turned on. It will be lit if it is on, and it will be off if it is off. Therefore, among the charged portions of the photoreceptor drum 10, the portion where the light emitting element 152 is turned on is charged, and even if the charged portion is exposed thereafter, no electrostatic latent image is formed, and the document image is erased. This means that Thereafter, the data in the memory 140 is read out column by column in the same manner, and the image is erased.

Next, the main parts of this invention will be explained.

In the present invention, by using the spot light source 131 described above, it is possible to designate a portion of a document to be underlined, and to add an underline to an image formed during image formation.

That is, the original is set on the document table 2, and the underline designation key 30h is pressed to set the main processor group 7 to the underline designation mode. Thereafter, in the same manner as the erasing range specification operation described above, the operation keys 30a to 30d and the position specification key 30m are operated to specify a portion on the document where an underline is to be formed. FIG. 3(a) shows an example of this, in which the range designated by S1 to Sb and Sc%Sd is the range in which the underline is formed. After specifying the range in this way, when the copy key 301 is pressed, the copying operation is performed according to the flowchart shown in FIG.

That is, in step S1, the exposure lamp 4 is turned on 7, the original is exposed and scanned, and a normal copying operation is performed. When this copying operation is completed, the hyperactive copying unit 603 is operated in step S2, and the paper on which the original image has been formed is again sent to the photosensitive drum 10 side. When the paper is sent to the photoreceptor drum 10 side, the photoreceptor drum 1o is moved in step S3.
is driven, and the fed paper is fed in synchronization with this drive. Thereafter, in step S4, the erasing array 150 is controlled to light up according to the specified range. That is, in this case, the light emitting elements 15 outside the specified range
2 is lit and the light emitting element 15 corresponding to the specified range
2 is turned off. At this time, the exposure lamp 4 is turned off,
No exposure scanning of the original is performed.

Therefore, the surface charge of the photoreceptor drum 100 remains only in the specified range, and the other parts are erased. The electrostatic latent image formed on the photosensitive drum 10 is developed by a developing device 12. Figure 1 shows an example, and L
is an unlined image developed on the photoreceptor drum 10.

By the way, the light emitted from each light emitting element 152 of the erasing array 150 to the photosensitive drum 10 is shown in FIGS. 2(a) and 2(b).
As shown in FIG. 2, the light converges in the rotational direction of the photoreceptor drum 10 and diffuses to some extent in the longitudinal direction of the photoreceptor drum 10. Therefore, the width δ of the residual charges in the portion corresponding to the light-emitting elements 152 that are turned off is slightly narrower than the pitch P of the light-emitting elements 152.

As described above, the underline L developed on the photosensitive drum 10 is transferred to the fed paper in step S5, and then fixed and discharged. Therefore, an underline L is formed in the specified range on this paper as shown in FIG. 3(b).

According to the embodiment described above, a predetermined range of the document is specified by the spot light source 131, and the image of the specified range can be erased using the erasing array 150. Therefore, it is convenient when editing a manuscript. In addition, since an underline can be formed in a specified range of the document using the spot light source 131, various editing operations can be performed.

Note that this invention is not limited to the above embodiments.

For example, the arrangement position of the erasing array 150 is not limited to between the charger 11 and the exposure section ph shown in FIG. 22, but may be arranged between the exposure section ph and the developing device 12 as shown in FIG. It is also possible to configure the electrostatic latent image that has been formed to be erased according to a designation.

Others - Of course, various modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

As described in detail above, according to the present invention, an image forming apparatus is capable of selectively erasing any part of a document image, and is also capable of forming a line of a predetermined width in a required part. can be provided.

[Brief explanation of the drawing]

1 and 2 respectively show an embodiment of an image forming apparatus according to the present invention, FIG. 1 is a front view of the main parts shown for explaining the underline forming operation, and FIG. (a) is a side sectional view showing the main parts of Fig. 1, Fig. 3 (b) is a front view showing the main parts of Fig. 1, Fig. 3 is a diagram showing an example of the underline forming operation, and Fig. 4 is a flowchart showing the underline forming operation, FIGS. 5 and 6 show the configuration of the image forming apparatus, FIG. 5 is an overview perspective view, FIG. 6 is a side sectional view, and FIG. 7 is an operation diagram. A plan view showing the configuration of the panel,
FIG. 8 is a perspective view showing the structure of the drive unit, FIG. 9 is a perspective view schematically showing the drive mechanism of the optical system, FIG. 10 is a perspective view schematically showing the drive mechanism of the pointer, and FIG. 11 is a perspective view schematically showing the drive mechanism of the optical system. 12 is a block diagram showing the overall control circuit; FIG. 12 is a block diagram of the main processor group; FIG. 13 is a block diagram of the first sub-processor group;
The figure shows the second sub-process. Fig. 15 is a schematic block diagram showing the control circuit of the pulse motor, Fig. 16 is a diagram shown to explain the speed control method of the pulse motor, and Fig. 17 shows the main parts of the spot light source. FIG. 18 is a side sectional view of the main part showing the spot light source, FIGS. 19 to 21 are plan views shown to explain the operation of specifying the erasing range of an original using the spot light source, and FIG. 22 is a perspective view. 23 and 24 respectively show the relationship between the erasing play and the photosensitive drum, and FIG. 23 shows only the main parts. Perspective view shown, second
Figure 4 is a front view showing only the main parts, and Figure 25 is a diagram showing the configuration of the erasing array.
) is a partially cut away front view, FIG. 26 is a circuit configuration diagram showing the configuration of the array driving section, and FIG. 27 is a side sectional view of the main part showing another example of the arrangement of the erasing array. DESCRIPTION OF SYMBOLS 1... Copying machine main body, 2... Document table, 10... Photosensitive drum, 30a-30d... Operation keys, 30e...
・Position specification key, 30f, 30g...Erase range specification key, 30h...Underline specification key, 411・
... 1st carriage, 603... Multiple copying unit,
21... Main processor group, 131... Spot light source, 132... Light emitting element, 133... Lens, 1
35...Pulse motor, 150...Erasing array, 1
52... Light emitting element, 153... Lens, 160...
- Array drive unit, 140... memory, P... paper,
ph...Exposed area. Applicant's agent Patent attorney Takehiko Suzue (a)
(b) Fig. 51gI Fig. 8 Fig. 10 Fig. 14 Prisoner 15 Prisoner Fig. 16 Fig. 17 Fig. 18 Fig. 19 Fig. 20 (a) 30C inside blade b3 Blade Fig. 20 Fig. 21 (a) 140 (b) Fig. 22 Fig. 27 i) Fig. 23 Fig. 24 Fig. 25

Claims (1)

[Scope of Claims] 1) A document placed on the document table is optically scanned by a scanning means that moves along the document table, and a reflected light image from the document is transferred to an image carrier to which a charge is applied. In an image forming apparatus that forms an image by forming an image on a material to form a charge pattern, developing this charge pattern, and then transferring and fixing it to a transfer material,
a conveying means for conveying the transferred material on which the image has been formed to the image carrier again; a specifying means provided in the scanning means for specifying an arbitrary range of the document using transmitted light; an erasing means for leaving charges in a predetermined width in a predetermined width and erasing charges in other parts from the image carrier, and developing the image carrier from which the charges have been erased and transferring the transferred material conveyed by the conveyance means. An image forming apparatus comprising: a control means for forming a line of a predetermined width in the specified range. 2) The instruction means is provided in the scanning means, is movable in a direction perpendicular to the moving direction of the scanning means, and comprises a light emitting element and a lens that irradiates the original with spot light. The image forming apparatus according to item 1. 3) The image forming apparatus according to claim 1, wherein the erasing means comprises a plurality of light emitting elements arranged near the image carrier along the longitudinal direction of the image carrier.