JPS6269281A - Image forming device - Google Patents

Abstract

PURPOSE:To eliminate misprinting, etc., by preventing a priority mode from being entered automatically as long as another mode is not specified unless printing operation is performed for a certain time. CONSTITUTION:A specific image is not entered preferentially even at a certain elapsing time after image forming operation unless another image mode is specified, and the mode specified previously is maintained. It is judged whether or not a print mode which is not used in the print mode of an N-P selection key 351 or P-P selection key 352 is selected or not again after the printing operation. When not, it is confirmed whether or not it is a time to count a set print quantity. When so, it is judged whether or not the counted value of the set print quantity is a set value or not and when the counted value is the sent value, a time wherein no operation key is operated, e.g. 30sec are set internally; when this value is reached, the print quantity is rest to an initial value and the set print quantity is cleared.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus that performs recording on a recording medium.

[Technical background of the invention and its problems] Microfilm has been widely used for recording and storing various information. A microfilm reader/printing device is provided which allows an operator to read the film image by enlarging and projecting the microfilm and printing out the image on the film as necessary.

For example, with such a microfilm reader, there are two ways to print out a negative image such as a microfilm as a positive image and a case where a positive image is printed out as a positive image. In conventional microfilm reader printing devices, the N-P mode is set as the priority mode in the print mode, and if the operator does not print for a certain period of time while using another print mode, the priority mode is set. This caused the problem that the operator would print in an unselected priority mode under the illusion that they were in the same mode, resulting in misprints.

[Purpose of the Invention] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image forming apparatus that does not automatically return to the priority mode even if no printing operation is performed for a certain period of time. shall be.

[Summary of the Invention] A summary of the present invention, which is a distant relative of the above object, is an image forming apparatus that performs image formation by specifying - image mode among a plurality of image modes. After the operation is completed, the control unit controls to maintain the previously specified image mode without returning to the specific image mode even after a certain period of time has passed unless another image mode is specified. It is characterized by having.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

First, referring to FIGS. 1 and 2, the image formation 'I' of the present invention will be described.
The outline of the microfilm reader/printer A will be explained.

FIG. 1 is an external perspective view of a microfilm reader printing device, and FIG. 2 is a schematic sectional view of the device. In FIG. 1, a device includes a projection screen 1.0 for enlarging and projecting microfilm onto this microfilm reader/printer 1. Operation panel equipped with various operation keys etc. 2. A film holding plate 3 for holding the microfilm is arranged on the front side, and a paper feed cassette 4 for copying the film can be inserted and removed from the front side, and a film image is formed. Paper can be ejected above the insertion/ejection opening of the paper feed cassette 4.

Therefore, the necessary operations for microfilm projection and copying can be performed from the front side of the main body of the apparatus.

The internal structure of this microfilm reader/printer is as shown in FIG.
a film setting unit 10 which has a light source 11 for projection on its upper surface and a built-in light source 11 for projection below, projection units 1 to 20 for projecting a film image onto the projection screen 1, and a rotary mirror in this projection unit 20. 34 (details will be described later), and a scanning light guide unit 50 that guides the scanning light created in step 34 (details will be described later), and an image is transferred to the recording medium in the paper feed cassette 4 based on the scanning light from this scanning light guide unit 50. It consists of an image forming unit 100 that forms an image. The film setting unit 10 and the projection unit constitute a projection means, and the rotating mirror 34 and the scanning light guide unit 50 constitute a scanning means.

Next, the structure and operation of the image forming unit 100 will be explained with reference to FIG. 3. This figure is a schematic sectional view of the image forming unit 100. In the figure, 101 is an image forming unit main body, the paper feed cassette 4 is located on the bottom side of this main body 101, and the paper output tray 104 is located on the left side (front side of the microfilm reader/printing device). It is installed. Also, this main body 10
1, there is a photosensitive drum 107 which is an image carrier.
is installed. A shutter mechanism 360 for blocking the scanning light from the scanning light guide unit 50 and a solenoid 361 for driving the shutter mechanism 360 are disposed above the photosensitive drum 107. Furthermore, this photoreceptor drum 1
07, there is a charging device 108.07 as a charging means.
Developing device 19110, pre-transfer static eliminator 109. A transfer charger 111 which is a transfer means. Peeling charger 112. Sei 1
m device 113. , a static elimination lamp 114, and the like are sequentially arranged. Further, in the lower part of the main body 101, the paper P automatically taken out from the paper feed cassette 3 via the paper feed roller 115 is discharged through the image forming section 116 between the photoreceptor drum 107 and the transfer charger 111. A paper transport path 117 leading to the paper tray 104 is formed. On the upstream side of the image transfer section 116 of this paper conveyance path 117, there are registers 1 to 1-D' 118, and on the downstream side there are registers 1-D as a fixing device.
- roller 119 and paper discharge roller 120 are provided.

When the photoreceptor drum 107 is driven in the direction of the arrow a in the figure, it is first uniformly charged by the charger 108, and the scanning light from the scanning light guide unit 50 is sequentially applied to the photoreceptor drum 107-. An electrostatic latent image is formed. The formed electrostatic latent image is developed and made visible by the developing device 110, and is sent to the transfer charger 111 side.

On the other hand, the IP supplied from the paper feed cassette 4 is supplied from the registers 1 to 118, and is previously supplied to the photoreceptor drum 118.
The image formed on 07 is transferred by a transfer charger 111. The paper P to which this image has been transferred is peeled off from the photoreceptor drum 107 by a peeling charge 113, passes through a paper transport path 117, and is guided to a heat roller 119.
After the transferred image is fused and fixed here, it is discharged to the paper discharge tray 104 by the paper discharge roller 120. On the other hand, after the image is transferred to the paper Pi, the residual image on the photoreceptor drum 107 is erased, in preparation for the next copying operation.

In the main body 101, an upper frame 102 and a lower frame 103 are pivotally supported at one end via a support shaft 103A. ．． Developing device 110.
Cleaning device 113. Each device such as the static elimination lamp 114 is attached by appropriate means, and the upper unit 101A
It consists of Further, the lower frame 103 has paper feeding capacity 1 to 4. Transfer charger 111. Peeling charger 11
2. Each mechanism such as the heat roller 119, the paper ejection roller 120, the paper ejection tray 104, the main motor 128, etc. is attached by appropriate means, and the lower unit I-101
It constitutes B. Then, the first side panel 32
6 to open (,) the upper frame 10.
2 is rotated around the support shaft '103A, the paper P can be opened substantially along the paper conveyance path 117 (also referred to as a clam shell structure). This is convenient in terms of removal and maintenance in the event of a paper jam. Further, 129 is a platen renoid for bringing the cleaning blade 130 of the cleaning device 113 into and out of contact with the photosensitive drum 107.

Next, in the developing device 110 having the above configuration, positive-positive (hereinafter abbreviated as P-+P) development is performed.
Negative-positive (hereinafter abbreviated as N-4P) development will be explained with reference to FIG. Figure 4 is P
FIG. 3 is an operation explanatory diagram illustrating operations of -4P development and N→P development. In addition, the operation described in the square frame in FIG. 4 indicates the P-+P development operation, and when N→P development
Only operations different from development are listed within the circle frame.

First, PP development will be explained. When performing the P-+P phenomenon, a P-P selection key, which will be described later, on the operation panel 2 is pressed, and only the first developing device 1321 is set to an operating state according to the operation of the developing device @110 described above. and,
P-Th+) During development, the charger 108 has a surface potential of 8
The photoreceptor 107 is positively charged at 00V. Thereafter, the scanning light of the microfilm 5 is irradiated onto the photoreceptor 107 via the scanning light guide unit 50 by the scanning of the rotating mirror 34 . Here the fifth
As shown in Figure 1 (a), the projection light (scanning light) for the positive microfilm is irradiated onto the photoreceptor 107 corresponding to the area other than the letter A. Therefore,
The surface potential on the photoreceptor 107 corresponding to the portion other than the letter A is attenuated, and only the surface potential on the photoreceptor 107 corresponding to the portion of the letter A remains. As a result, an electrostatic latent image corresponding to the letter A on the microfilm is formed. On the other hand, a bias voltage of 230 V is applied to the magnetic roller 143 in the first developing device 1321, and the toner and carrier in the developer mechanism section 1331 are charged in a positive direction and a negative direction in accordance with the charging series of both materials. 11! Frictionally charged. The toner conveyed along the circumferential surface of the sleeve 1441 together with the carrier is opposed to the latent image on the surface of the photoreceptor 107 and is attracted onto the photoreceptor 107 by Coulomb force, so that the toner is attracted to the electrostatic latent image. is manifested.

On the other hand, the paper P supplied from the paper feed cassette 4 is synchronized by the registration roller 118 and guided to the transfer charger 111. According to the rotation of the photoreceptor 107, the photoreceptor 107 reaches the transfer charger 111, and is connected to the image forming section 1.
At position 16, the image on the photoreceptor 107 is transferred to the transfer charger 11.
1, the image is transferred onto the paper P. Note that the voltage applied to the transfer charger 111 at this time is DC5.4 KV.

Thereafter, this paper P is peeled off from the photoreceptor '107 by the peeling charger 112. At this time, the stripping charger 112 is driven at AC4.1 KV. After that, this paper P passes through the paper conveyance path 117 and passes through the heat roller 1
19, where the transferred image is fused and fixed, and then discharged to a paper discharge tray 104 by a paper discharge roller 120. P-+P development is completed in the above manner.

Next, N→P development will be explained. When performing N-4P development, an N-P selection key, which will be described later, on the operation panel 2 is pressed, and only the second developing device 1322 is set to an operating state according to the operation of the developing device described above. And N→P
During development, the cloth cylinder charger 108 has a surface potential of 800V.
The photoreceptor 107 is positively charged.

Thereafter, as the rotating mirror 34 scans, the scanning light of the microfilm 5 is irradiated onto the photoreceptor 107 via the scanning guide unit 50.When developing the print, the portion to be irradiated with light is determined as described below. The shutter solenoid 261 is turned on so that the scanning light is not irradiated onto the photoreceptor 107 except for the portion to be printed, and the shutter mechanism 360 is moved in the direction of arrow C as shown in FIG. . . Here, Fig. 5 (
The projection light (scanning light) for the negative microfilm as shown in b> is irradiated onto the photoreceptor 107 corresponding only to the portion of the letter A.

Therefore, the surface potential on the photoreceptor 107 corresponding to the portion of the letter A is attenuated, and the surface potential of the photoreceptor 107 corresponding to the portion other than the letter A is attenuated.
The surface potential on 07 will remain. By the way, a bias voltage of 400 cm is applied to the magnetic roller 1432 in the second developing unit 1322, and the developer @ structure 1332
The toner and carrier inside are triboelectrically charged, with Kyrelia being negatively charged and the toner being positively charged according to the charging series of both materials. Therefore, the letter A on the photoreceptor 107
The area corresponding to the area (area where the surface potential is attenuated) appears to have an upper negative potential with respect to the magnetic roller 1432, and the positively charged toner is attracted to that area by Coulomb force. It turns out. As a result, development corresponding to the letter A is performed on the surface of the photoreceptor 107.

Thereafter, the photoreceptor 107 reaches the pre-transfer static elimination lamp 109 as it rotates. At this point, electricity is removed before transfer. This is because the paper P is usually easily charged to the negative side, and the surface potential on the photoreceptor 107 other than the developed area is high during N→P development, so static electricity removal before transfer is performed. This is because, if not, the photoreceptor 107 and the paper P may not be separated well.

Therefore, this pre-transfer static elimination is performed to enhance the peeling effect. Next, the image on the photoreceptor 107 is transferred to the image forming section 1
At position 16, the transfer charger 111 performs transfer onto the paper P. At this time, in order to transfer the positively charged toner, a voltage of -5.0 KV is applied to the transfer charger.

Next, this paper P is transferred to the photoreceptor 1 by a peeling charger 112.
It will be peeled off from 07. At this time, the stripping charger 112 is driven with a voltage of 4.5 KV AC+1 DEG OKV DC, which is shifted to the positive side compared to the time of P-+P development, so as to enhance the stripping effect. From then on, the above P-+P
The paper P is ejected to the paper ejection tray in the same manner as during development.

In addition, since the type of toner used is different between P→P development and N→P development, the IJ mouth heat of the heat roller 119 is adjusted so that each toner is optimally fixed. The temperature and pressure may be changed depending on each development.

In the apparatus of this embodiment, both the first developing device 1321 for P-P development and the second developing device 1322 for N-+P development are loaded, but the first developing device 1322 for N-+P development is loaded. If the mode is switched to the other mode during operation, inconveniences will occur due to switching of polarity in various devices. Therefore, during development, P-P, which will be described later, on the operation panel,
Selection of the NP selection key is disabled.

In addition, in the apparatus of this embodiment, at the time of the first copying after switching between P-+P development and N→P development, the photoreceptor 107 is idly fed, for example, one rotation, and P-P development is performed.

N→P development is not performed continuously within a short period of time. This is because a positive or negative history remains on the photoreceptor 107 after one of the developments, so it is necessary to shift the timing of copying and erase the history.

Next, the operation panel 2 will be explained with reference to FIG. 6. In FIG. 6, 350 is an adjustment volume for exposure, 351 and 352 are the P-P development selection keys, respectively;
The N-P development selection key 353 is on the display board. Further, 354 is a copy number setting key, 355 is a clear/stop key, 356 is a standby key, 357 is a copy start key, and 358 is a main switch. Here, on the display board 353, 1. Displays include an N→P display, a P-+P display, a toner replenishment display, a paper replenishment display, a paper jam display, a copy standby display, a copy ready display, and a copy number display.

Further, the main switch 358 is made of microfilm.
This is a switch that starts driving the reader/printer. When this main switch 358 is turned on, the light source 11 in the film setting unit 10 is turned on to enable projection, and the heater in the image forming unit 100 is also turned on.
It is designed to do N. In addition, the standby key 3
56 turns off only the light source 11 by turning it on.
It is supposed to be done. This is the image forming unit 10
This is to avoid unnecessary projection by turning on the light source 11 even during warm-up, since it takes time to warm up the heater within 0. Leaving the light source 11 on for a long time has the disadvantage of not only increasing the temperature but also significantly reducing the life of the light source 11, so the standby key 356 can compensate for this disadvantage.

Next, the control circuit will be explained with reference to FIG.

In the figure, the reference numeral 400 denotes a microcomputer (hereinafter referred to as a microcomputer) which is a control unit and controls the entire reader printer. This microcomputer 400 has input expansion such as data selection, and various keys 351 on the operation panel via an interface 401.
, 352, 354 to 357, etc., various switches necessary for control, sensors 403, developer concentration detector 1421 of the first developing device 1321, developer remaining amount detector 40'41. Developer presence/absence signal generation means 4051 and developer concentration detector 1422 of the second river imager 1322
, a developer remaining amount detection device 4042, a developer presence/absence signal generation means 4052, and the like are connected. Also, this microcomputer 40
0, various display devices 353 of the operation panel 2, the first developer 1321,
and each pole switching solenoid 209 of the second developing device 132B,
209, the reversible motor 163, the first current @
Each of the container 1321 and the second developing device 1322! A developing bias power source 407 for the llll-ra 1431 and 1432, a charging power source 408 for the charging electric machine 108, a transfer power source 409 for the transferer charging pin 111, and a stripping power source 410 for the stripping charger 112. , the static elimination lamp 114, the main motor 128, the shutter solenoid 361, the motor 411 for reciprocating the rotating mirror 34, and the film 1f.
0N10FF of the lNFj light source 11, a light source control circuit 412 that controls the applied voltage, a heater lamp 413 that constitutes a heating means to keep the surface temperature of the heat roller 119 at a constant temperature, and this heater lamp is 0N10FF.
A heater control circuit 414 for FF control, various solenoids 415, etc. are connected.

The input remote signal of the developing bias power supply 407 has a 2-bit configuration, for example, as shown in FIGS.
As shown in the truth table in the relationship diagram shown in b), the first developing device 1
The voltage applied to the magnetic roller 1431 of 321 and the magnetic roller 1432 of the second developing device 1322 can be controlled. Here, when performing P-PTI imaging, O(V), N-P are applied to the magnetic 11-ra 1432 of the second developing device 1322.
When performing development, the magnetic loaf 14 of the first developing device 1321
31 G:, 400 (V) is applied. This is because by applying the toner in this manner, even if the developer cannot be sufficiently removed from the developing roller of the unused developing device, development from the unused developing device can be prevented. The truth tables showing the structure and relationship of the transfer power source 408 and the peeling power source 409 are shown in FIGS. 9(a) and (b) and FIG. 10(a>,
As shown in (b), the voltages applied to the transfer charger 111 and the peeling charger can be switched based on the combination of the input signals. Further, the truth table, which is a diagram of the configuration and relationship of the light source control circuit 412, is shown in FIG. 11(a), (
As shown in b), the light source 11 is set to 0 using the remote M@H.
N10FF can be done, +)-T NEET M No. H@ON
, I, J are 0FF (7) 1 is the print mode for P-P development (hereinafter referred to as print mode), remote communication @H, J@ON, and I is OFF is the N-P development mode. (hereinafter referred to as N-P mode), and remote signals H, I
When turned on, the voltage applied to the light source 11 can be switched to screen projection mode (hereinafter referred to as screen mode). And this light source control circuit 4
12 is electrically connected to the exposure resistance adjustment volume 350 on the operation panel 2, and in the case of P-P mode, the initial mover of the exposure resistance adjustment volume 350 is moved to the left in FIG. 6, and in the N-P mode. In this case, the circuit configuration is such that the voltage applied to the light source 11 increases by moving it to the right. With this circuit configuration, the P-P phenomenon/N-P
In any case of development, the degree of print 1 to image tHfa can be made brighter by moving the slider of the exposure adjustment volume 350 on the operation panel 2 to the left in FIG. 6, and darker by moving it to the right. Further, the screen shade has a configuration that allows the light source 1 to be constant regardless of the movement of the exposure adjustment volume 350.

The block diagram and relational diagram shown in Fig. 12 (a) and (b) show the truth table of the heater control circuit and the relational diagram, respectively.This heater $lj control circuit is shown in Fig. 12(b). Two signals @K are input to the input side of this circuit as shown in the truth table.

The heater lamp is controlled in three states depending on the combination of L. In other words, the ON signal is O in the same figure.
When it is in the FF state, the heater lamp is in the OFF state regardless of the surface electric signal, and this ON signal is in the ON state.
In this state, the ft signal maintains that state, that is, the set temperature of the heater lamp at 200'C or 160'C, which is the set temperature in the power saving mode.

Next, FIG. 13 (a>
, (b), and (c).

First, when the power is turned on, the process proceeds to step A1.

In step A1, the A flag is set to 1'' in order to project the film onto the screen, and at the same time the heater lamp 413 of the heat roller 119 is turned on, and the process proceeds to step A2. In step A2, the second developing device 1322
Turn on the pole position switching solenoid 209' and proceed to step A3.

In step A3, the main motor 128 is turned on, the reversible motor 163 is reversed, and the static elimination lamp is turned on.
As the state, the process advances to step A4. However, the second developing device 1
322 is driven, and a developer magnetic brush 1352 is formed on the surface of this developing roller 1312. In step A4, the remote signal G of the charging power source 408 and the stripping power source 410 is turned on, and the process proceeds to step A5. Step A5
In step A4, the point at which charging starts on the photosensitive drum 107 is the developing device ff11 of the second developing device 1302.
At the timing of reaching 362, the developing bias power supply 40
Turn on the remote signal @A of 7 and 8 and proceed to step 86. In step 86, the pole position switching solenoid 209 and charging power source 408 are set to 0FFL, and in step A7, the timing at which the point at which charging on the photosensitive drum 107 ends in step 80 reaches the developing position 1362 of the second developing device 1322 Set the developing bias power supply 407 to 0FFL.
Proceed to step 88. In step 88, the reversible motor 163 and the peeling power source 410 are turned off, and the process proceeds to step 9. As a result, the developer magnetic brush 1352 is neutralized from the surface of the development [1-ra] 1312 of the second developing device 1322 . In step A9, the pole position switching solenoid 209 of the first developing unit 1321 is turned on, and the process proceeds to step A10.

In step A10, the reversible motor 163 is rotated forward, and the process proceeds to step A11. Thus, the first developing device 1321 is driven, and a developer magnetic brush 1351 is formed on the surface of the developing roller 1311.

In step A11, the remote signal E of the peeling power source 410 is
is turned on and the process proceeds to step A12. Step △12
Now, rotate the registration row 118 and proceed to step A1.
Proceed to step 3. In step A13, it is checked whether or not there is paper on the paper bus using sensors that detect the presence or absence of paper (paper) provided on the paper path, and if it is detected that there is paper, the process proceeds to step A14. In step A14, step A
At step 12, it is checked whether a certain period of time has elapsed since the registration roller 118 was rotated. This certain period of time is sufficient time for the paper in the device to be completely ejected. If this certain period of time has not elapsed, the process advances to step A13. If this certain period of time has not elapsed, this means that a paper jam has occurred within the apparatus, and the abnormality is dealt with.

On the other hand, if there is no paper on the paper path in step A13, the process advances to step A15. In step A15, the extreme purchase switching solenoid 209 is turned off and the process proceeds to step A16. In step A16, the main motor 128, reversible motor 163, static elimination lamp 114, stripping power source 410, and registration roller 118 are stopped, and the process proceeds to step A17. The developer magnetic brush 1351 is thus removed from the surface of the developing roller 1311 of the first developing device 1321.

In step A17, the developer 1321 and the developer 1322
It is checked by the developer presence/absence signal generation means 4051 and 4052 whether or not at least one developer is installed, and if both are not installed (814), step A18 is performed.
Proceed to. In step A18, the heater lamp is set to 0FFL and the N-P, P-P and print ready displays on the operation panel 20 are turned off, and the standby state is reached, that is, no printing operation is being performed and the heat roller 119 is at a temperature that allows fixing. state. Further, if at least one of the developing devices is installed in step A17, step A
Proceed to step 19. In step A19, it is checked whether priority should be given to N-P development selection using switches on the control PC board (not shown), and if priority is given to N-P development, the process proceeds to step A20 and the second developing device 1322 is selected. Proceed to step A22. On the other hand, in step A'19 above, N
If priority is not given to -P development, the process proceeds to step A21, selects the first developing device 1321, and proceeds to step A22.

In step A22, it is checked whether or not warming up of the heat roller 119 has been completed. If it has been completed, the symbol for printing ready display on the operation panel is lit and the printer enters a standby state, and in step A23, the operation panel 2
It accepts the above key operations.

In step Δ24, it is checked whether the second developing device 1322 is installed based on the developing device presence/absence signal from the second developing device 1322, and if it is not installed, step A25 is performed.
Proceed to. In step A25, it is checked whether or not the first developer is installed based on the developer presence/absence signal from the first developer 1321. If the first developer is not installed, the system returns to the standby state.

On the other hand, if the second imager 1322 is attached in step A24, the process advances to step A26.

In step A26, it is checked whether the first developing device 1321 is installed, and if it is installed, step A2
Proceed to step 7. In step Δ27, it is checked whether the second developing device is currently selected, and if the second developing device is not selected, the process advances to step A28. In step A28, N on the operation panel is
It is checked whether the Pmm selection-3521J〇N state is set, and if the first developing device 1321 is not installed in the ON state or in step A26, the process advances to step A29. In step A29, the second developing device is selected and the process proceeds to step A32. On the other hand, if the second developing device is selected in step A27, the process advances to step A30. In step △30, P-P selection key 3 on the operation panel
51 is turned on, and if it is turned on, or if the first developing device 1321 is installed in step A25, the process advances to step A31.

In step A31, the first developing device 1321 is selected, and the process proceeds to step A32. On the other hand, in step A28 above, N
If the P selection key 352 is in the ON state, or in step A30 above, the P-P selection key 35
If 1 is not considered to be in bad ON condition, the developing device selection remains as it is and the process proceeds to step A32. In this way, the first developing device 1
321 and the second developing device 1322, or if either one of them is not installed, selection of that developing device is prohibited. In step A32, it is checked whether or not there is an abnormality in the apparatus, and if there is an abnormality, the abnormality processing is performed, and if there is no abnormality, the process advances to step A33. In step A33, it is checked whether or not there is paper in the paper feed force cellars 1 to 4, and if there is not, the state returns to the standby state.
If so, proceed to step A34. In step A34, it is checked whether or not the print key 357 on the operation panel 2 is turned on. If it is turned on, the process proceeds to a print operation to be described later; if it is not turned on, the process proceeds to step A35. In step A35, it is checked whether or not any key operation has been performed for a certain period of time on the operation panel 2. If any operation has been performed, the process returns to the standby state, and if no operation has been performed, the process advances to step A36. In step A36, the printer 1 to set number of copies is set to 1, and the printer returns to the standby state.

Next, the operation of the printer 1 will be explained with reference to the flowcharts x-1 shown in FIGS. 14(a), (b), (c), and (d).

When one of the pudding 1 to 357 keys on the operation panel is pressed, the process advances to step B1. In step B1, the rotating mirror 34 is moved to the printing position in the interrupt processing described later.
In order to turn on the light source 11 at the selected print key, the B flag is set to 1 and the process proceeds to step B2. Step 82'c is the blade solenoid 1 of the cleaning device 113.
29 is in the ON state, and the pole I 17 position switching solenoid of the selected developer is turned ON (this year, the process proceeds to step B3. In step B3, the reversible motor 163 is rotated in the direction of the selected developer, and the main motor 128 is turned on. .Turn on each of the static elimination lamps 114 and proceed to step B4.In step B4, it is checked whether or not the developing device selected is the second developing device.If the second developing device is not selected, step B
Proceed to step 5. In step B5, the remote signal C of the transfer power source 409, the remote signal E of the peeling power source 410, and the remote signal A of the developing bias power source 408 are turned ON, and the process proceeds to step B7. On the other hand, if the second developing device is selected in step B4, the process advances to step B6.

In step B6, the charging power source 408. Peeling power supply 410
remote signal [:, F, G and development bias power supply 4
The remote signal B of 07 is turned ON and the process proceeds to step B7. In step B7, photosensitive drum 1 is removed in step B6.
The point where charging starts on 07 is @2 developer 132
At the timing when the developing position 1362 of No. 2 is reached, the remote signal A of the developing power source 407 is turned ON, and step B is performed.
Proceed to step 8. In step B18, it is checked whether the rotating mirror 34 is at the scanning start position or not. If it is at the scanning starting position, the process proceeds to step 810, and if not at the scanning starting position, step B
At step 9, the rotary mirror 34 is rotated in the direction to return it to the scanning start position (383), that is, rotated clockwise in FIG. In step B11, it is checked whether or not the rotary mirror 34 is at the printer 1~ position, and the process proceeds to step B12.In step B12, the paper feeding operation from the paper feed cassette 4 is started, and the process proceeds to step B13.In step B13, the process starts feeding paper from the paper feed cassette 4. The rotary shaft 38 is started to rotate forward, that is, in the counterclockwise direction, in order to wind the sujiru belt 37 onto the rotary sear 38, and the operation of the film is started, and the process proceeds to step B14.In step 1314, the charging power source 408 is turned on. If the condition is bad, the process proceeds to step B15. In step B15, the X/ivy solenoid 361 is set to 0FFb, and the process proceeds to step B'16.

In step B16, the registration roller 118 sends the paper to the image transfer section 116, and the operation panel 2-. The content displayed on the 1m sheet number display section is subtracted by 1, and the counter for the selected developing device (not shown) is incremented by 1, and the process advances to step 817. In step B17, it is checked whether or not the second developing device has been selected. If the second developer is selected in step B19, the registration roller 11 is selected in step 816.
8 is rotated, and at the timing when the leading edge of the paper reaches the image transfer unit 116, the signal to the remote 1 of the transfer power source 409 is turned on, and the process proceeds to step B20. Step 82
At 0, the shutter solenoid 361 is turned on to block the scanning light onto the photoreceptor 107, and the process proceeds to step B21. In step 821, the rotary shaft A7 is stopped, the film operation is completed, and the process proceeds to step 822. In step 822, it is checked whether printing of the set number of sheets has been completed. If not, the process advances to step 824, and if it has been completed, the process advances to step 823. Step B
At step B23, the flag is set to 1 in order to perform the film projection operation again, and the process proceeds to step B24. In step B24, the rotating shaft 38 is reversed to start the operation of returning the rotating mirror 34 to the scanning start position, and the process proceeds to step B25.

In step 825, the registration roller 118 is stopped, and the process proceeds to step 826. In step B26, at the timing when the trailing edge of the paper passes the image transfer unit 116, the transfer power source 409
The remote signal is turned off and the process proceeds to step B27.

In step B27, it is checked whether the rotating mirror 34 is at the operation start position, and if it is at the operation start position, step 8
Proceed to step 28. In step 828, the rotating shaft 38 is stopped and the process proceeds to step 829. In step B29, it is checked whether or not the set number of prints (~) has been completed. If not, the process returns to step B12 and repeats the above-mentioned operation. On the other hand, the set number of prints (~) in step B29 is checked. If ~ has been completed, the process advances to step 830. In step 830, based on the signal from the developer concentration detector of the selected developer, it is determined whether the developer concentration of the selected developer is at an abnormal lower limit concentration level. Check and
If the lower limit density level is exceeded, the process proceeds to step B32, and if the lower limit density level is not exceeded, the process proceeds to step 831. In step 831, it is checked whether or not the developer has been continuously replenished for a predetermined period of time. If not, the process returns to step 830 and the above operation is repeated. When the developer is replenished continuously for a predetermined period of time, the process proceeds to step 32. In step [332, the pole position switching solenoid 209 is turned off, and step B33
Proceed to.

In step 833, the charging power source 408 is set to 0FFt.

The process then proceeds to step 834. In step B34, if the second developing device is selected, the process advances to step B35. Step 835
Then, in step B33, the developing bias power source 407 is turned off at the timing when the point at which charging on the photosensitive drum 107 ends reaches the developing position of the second developer 1322.
F and proceed to step 836. On the other hand, step 834
If the second developing device is not selected in step B35, the process jumps to step B35 and proceeds to step 836. In step 36, the developing bias power source 407. The transfer power source 409 and the peeling power source 410 are respectively turned off and the process proceeds to step B37. In step 837, the main motor 128, the reversible motor 163 . The static elimination lamps 114 are each turned off and the process proceeds to step 838. In step B38, the blade solenoid 129 of the cleaning equipment 113 is turned off.

Next, in step B39, after the above-described printing operation is completed, whether or not the N-Pi selection key 351 or 1]-P selection key 352 is pressed again is a print mode that is not used in the above-mentioned PJ non-mode. to judge. In this step B39, if one of the selection keys 351, 352, 4a, which is not used, is pressed, the process advances to step B46, and if it is not pressed, step B40
Proceed to. In step B46, the copy number setting key 354 is used to reset the set number of prints 82 to 1, and the process returns to the connector C. In step B40, it is checked whether it is the timing to count the set number of prints.

At this time, if the timing is right, the process advances to step B41. If it is not the timing, the process jumps to step B41 and proceeds to step B42. In step 842, it is determined whether the count of the print setting number (the number of prints is set using the print 1 to number setting keys 354) is the set value, and if it is the set value, the process advances to step 843. Otherwise, the process returns to step B40. In step B41, the number of prints is incremented by 1, and the process proceeds to step 842. In step B43, a time period during which no operation keys are operated, for example, 30 seconds, is internally set in advance, and when this value is reached, the process proceeds to step B44, and if not, the process returns to step B39. In step B44, the number of prints is reset to the initial value of 1,
Proceed to step B45. In step B45, the print setting number of copies is cleared and the process proceeds to connector C.

In this way, after a print operation, by resetting the print number setting without returning to the priority mode described above, the operation console that executed the print operation will restart the print 1 operation after a certain period of time. When doing so, it is possible to prevent misprinting without knowing that the print mode has returned to the priority mode during that certain period of time.

Next, a brief explanation will be given of the operation of the entire Myia 0 film reader/printer described above.

When projecting a film, first the handle part 13 shown in FIG.
Pull out the transparent plate 3 on the top of the film presser temporary 3.
Open A] and set the microfilm 5 between the transparent plates 3A and 38. Next, the main switch 35B on the operation panel 2 is pressed to turn on the projection light source 11. In this case, the enlarged image of the microfilm 5 can be viewed at 9 degrees.
This is done by rotating △, moving the handle part 13 back and forth and left and right to adjust the position of the projected image, and moving the handle 13 to the third front panel 3 specified by the projection screen or the pointer 14.
Do the coordinates on 23 as a child. Roughly, adjust the projection image rotation as necessary Kia 2ε34! : By performing the rotation operation, the projected image on the projection screen 1 can be easily rotated.

<Film image printing operation> Next, the enlarged image of this microfilm 5 is transferred to the paper feed cassette 1.
The operation when printing 1 to 4 on sheets P of 4 to 4 will be explained.

At this time, when the copy standby display is displayed on the display board 353 on the operation panel 2, the standby key 356 is turned off.
The light source 11 is turned on at 0FFb in the N state, and waits until the heater in the image forming unit 100 warms up. During this time, an operation button (not shown) is pressed to move the rotary mirror 34 shown in FIG. 2 in a direction from the surface shown in FIG. When the heater setup is completed and the display board 353 indicates that copying is possible, the standby key 356 is turned off. And then P
- Select either the P selection key 351 or the N-P selection key 352 according to the type of microfilm image. Thereafter, the number of copies is selected using the copy number setting key 354, and the copy start key 357 is pressed to start the printing operation.

Then, the projection light is scanned by the rotating mirror 34 which is rotated in synchronization with the rotation of the photoreceptor 107, and is irradiated onto the photoreceptor 107 via the scanning light guide unit 50.

On the other hand, the photoreceptor 107 is charged to a predetermined value by a charger 108 in accordance with P-+P development and NP development, and an electrostatic latent image is formed based on the scanning light. After that, when the photoreceptor 107 comes to the position facing the developing device 110,
A positive developer image is formed on the latent image based on the positive microfilm by the first developing device 1321, and a positive developer image is formed on the latent image (λ·1) based on the negative microfilm by the second developing device 132. After that, this developer image is transferred onto the paper P by the transfer charger 111 according to P-+P development and N→P development, and is roughly transferred to the stripping charger 111. ]12
The film is peeled off from the photoreceptor 107 by the following steps. Then, this paper P passes through the paper conveyance path 117 and passes through the heat roller 119.
After the transferred image is fused and fixed there, the paper is transferred to the paper discharge tray 107 on the side toward the front 1 of the apparatus by the paper discharge roller 120.
1.

- The residual toner remaining on the photoreceptor drum 107 is cleaned by the cleaning device 113, and the residual image on the photoreceptor drum 107 is roughly erased by the static elimination lamp 114, in preparation for the next copying operation. Further, when a paper jam of the paper P occurs in the middle of the paper transport path 117, this can be detected by the paper jam display on the operator's operation board 353. Then, the operator opens the first side panel 326 and supports the upper frame 102. 1031, the paper P can be easily placed on the paper transport path 117.
can be removed.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention.

[Effects of the Invention] As detailed above, the present invention does not automatically return to the priority mode unless another mode is specified even if no operation is performed for a certain period of time, so the operator can It is possible to provide an image forming apparatus that can prevent misprints and the like because it does not return to the priority mode during a certain period of time when a print operation is executed in the same mode without being operated.

[Brief explanation of drawings]

Figure 1 shows *Invention (this micro-noilm reader)
Figure 2 is a schematic sectional view of the device neck, Figure 3 is a schematic sectional view of the image forming unit 1, and Figure 4 is a schematic sectional view of the image forming unit 1.
The figure shows the two rivers of positive dip → positive development and negative development → positive j゛1 development (explanatory diagram without showing the movement, Figure 5)
a) and (b) are schematic diagrams showing the positive and negative microphone [cofilm images], and Figure 6 shows the operation panel! ! +! FIG. 7 is a block diagram showing the control circuit of this apparatus. FIGS. 8(a) and (b) are block diagrams and relational diagrams of the developing bias power supply, and FIG. 9 (a> ,(b)
Figure 10(a) is a block diagram and relationship diagram of the power supply for converter q.
. (b) is a block diagram and relationship diagram of the power supply for stripping, and Figure 11 (
a) and (b) are the block diagram and relationship diagram of the light source control 011 circuit, Figure 12 is the block diagram and relationship diagram of the heater ff1ll 1f11 circuit, and Figure 13 (a), (b), and (c) are the block diagram and relationship diagram of the light source control 011 circuit. Flowchart 1-1 Figure 14 (
a>, (b), (c), and (d) are 3°/100 . Funeral Figure 10 (b) Funeral] Figure (b)

Claims (1)

[Claims] In an image forming apparatus that performs image formation by specifying one image mode among a plurality of image modes, after a certain period of time has elapsed after the image forming operation in the one image mode is completed, unless another image mode is specified. An image forming apparatus comprising: a control section that performs control to maintain a previously designated image mode without preferentially returning to a specific image mode.