JPS61246767A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent the title device from copying loss under the preceding set conditions by restoring inputted image forming conditions to a reference mode when the start of image forming operation is not specified within a prescribed period after inputting the image forming conditions. CONSTITUTION:An original is set up on an original platen 5 and scanned by a scanning optical system 4 and an electrostatic latent image is formed on a photosensitive screen 1. Then, the electrostatic latent image is formed on an insulating drum 7, developed by a developing part 8, transferred to paper by a transfer part 11, and fixed by a fixing roller 13 and the copy is sent to a tray 14 and a sorter 18. At the time of copying, image forming conditions, such as the number of copies, the density of copying and a variable scale factor are inputted and a key for specifying the start of image forming operation is depressed. If the start of image forming operation is not specified within the prescribed period after inputting the image forming condition, reference image forming conditions are restored so that the number of copies is one, the density is medium and the variable scale factor is equal magnification. Since the reference mode is restored if the image formation is not started within the prescribed period from the final input of the image forming conditions, the device can be prevented from the misformation of an image.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus such as a copying machine that forms an image according to image forming conditions set manually.

In conventional copying machines, the desired number of copies and desired shading are set using dials, changeover switches, keys, etc. Therefore, when an urgent copy is required, the operator often turns on the copy button without checking the current number of sets or shading. Therefore, if the previous set conditions are different from the desired ones this time, it is completely useless. This causes a copy to be executed. In particular, in multi-service aircraft capable of high-speed, continuous copying, by the time the user notices the situation, he or she has already made dozens of useless copies (1), and the loss of 9 hours of paper can be fatal.

The present invention eliminates the above-mentioned drawbacks, makes it easy to set image forming conditions such as the number of times of image forming, density, etc., reduces image forming errors, and
The present invention also provides an apparatus such as a copying machine that can quickly resume image formation. That is, it has a front section for displaying the conditions for setting the image forming conditions as described above, and ±=
After setting the conditions manually, if image formation is not started within a predetermined time, the key #*t key clears the manual display. After clearing, the standard mode conditions (for example, the number of image formations is 1° This will be explained below with reference to the drawings. Figure 1 is a schematic sectional view of an example of a copying machine to which the present invention can be applied. This is a copying machine equipped with a reduction mechanism and a separate outlet for the sorter so that when a sorter is used, For copying, the paper feed section had a deck that could hold about five times as much paper as a normal copying machine, and on the other hand, it had a normal cassette, making it possible to feed paper mainly from the former. - When copying a predetermined number of copies for each original, a so-called sorter is used in the copying machine, which automatically performs the distribution work in order to eliminate the trouble of distributing the copies into a predetermined number of copies after copying.

A variable magnification mechanism is also used to reduce the original image in three stages to obtain a duplicate image.

In the figure, 1 is a photosensitive screen (for example, detailed in 1975 Patent Publication No. 19455), 2 is a primary corona charger,
3 is a secondary corona charger, 4 is a lamp, 5 is a document table, 6 is a modulation corona charger, 7 is an insulated drum, 8 is a developer, 9 is a roller that feeds the transfer paper 10, 11 is a transfer charger , 12
is a transport bell), 13 is a fixing roller, 14 is a tray, 18
is a sorter, and 20 is a bin of 10. The original on the original platen 5 is moved to the lamp 4. The slit exposure is carried out while moving the M-IS, and the rotating so-called three-layer screen 1 previously charged with the primary charger 2 is exposed simultaneously with the secondary charger to form an electrostatic latent image. The second electrostatic latent image is applied to the modulation charger 6 to form a second electrostatic latent image on the surface of the insulating drum 7, and the second electrostatic latent image is developed by the developer 8 with toner. The toner image is transferred to the transfer paper 10 fed from the cassette 52 or the lift deck 53 by the charger 11, the paper is conveyed, the toner image is fixed by the heat roller fixing device 13, and the sorter 1
8 or tray 14. Since the primary latent image does not disappear even after the secondary m-image is formed, the screen 1 is further rotated, and the secondary latent image is continuously formed on the charger 6, and the transfer paper is sent one after another to the transfer section. Transfer fixing and ejection are as many as the number of sets.
◎When the number of secondary latent images formed is exceeded by one primary latent image, the primary latent image is re-formed. cleaning section for removing toner, 17-2
is an AC corona discharger for removing residual charges from the insulating drum 7.

FIG. 2 shows the operating section and display panel of the apparatus shown in FIG. In the figure, SW is the process load of the subversive aircraft, the main switch for turning on the power to the control circuit, 21 is the copy start key, 2
2 displays the setting of the number of copies. 24 is a tray, 25F1
Sorter selection key, which itself lights up when the key is turned on to indicate whether the storage compartment is a sorter or a tray; 2
Reference numeral 6.27 is a cassette selection key and a deck selection key, and key 1 (blue) lights up to display selection when the key is turned on, and the size of paper in the cassette and deck is displayed at 32. Keys 28-1 to 28-3 are used to select shading, and when the key is turned on, it lights up to indicate the setting of each shading, medium, and light. 29 is a stop key for interrupting the copy operation, and 30-1 to 30-3 are keys for specifying scaling, each of which is 1x, 0.76x, and 0.6x.
Set 5x and turn on the corresponding part of the display 31.

If you select the output roller (bell 19 in FIG. 1), select the rotor 1B that moves so that the paper is ejected from the first ejection suit 50 as shown by the dotted line, then the user moves from the second ejection roller 51 as shown in the solid line. A belt 19 is set to eject the paper.

In addition, deck 53 is 2000-3000, cassette 52
It can store 500-1000 papers. The paper sent to the sorter 18 is carried by a constantly rotating bell (55) and sent to a bin. Guide claws a - i are provided for each bin, and each time the detector detects a paper, the guide claws are activated in order to direct the paper toward the bin and store it in each bin. The solenoid SL2 is activated to set the discharge port on the sorter 18 side as shown by the solid line.
30 seconds) When the copy key 21 is not turned on or any key is not turned on, 8L2 is automatically deactivated and the ejection port is returned to the tray 14 side. Also, the power switch 5W is turned on.
When the printer is turned on, the ejection port is set on the sorter side and the ejection port is left on the tray 14 for 30 seconds after copying is completed.

It is set when any of the keys 2B-1 to 28-3 is turned on.@ However, if the copy key 21 is not turned on within 30 seconds after that, or if some key is not turned on, the key 28-2 is automatically set.

The light intensity will return to the same level as when it was turned off.

Also, when the key 26 is turned on, the paper feed roller 9 on the cassette 52 side
When 27 is turned on, the roller 9 on the deck 53 side is set to be operable. However, if it is left alone for 30 seconds, it returns to the paper feed row 2 set of the deck 53, which stores the A4 size sheets, which are frequently used.

When the variable magnification keys 30-1 to 30-3 are turned on, the position of the lens 15, which is provided in the optical axis of the image reflected by the lamp 4, is moved left and right using a motor and a solenoid to obtain a predetermined magnification image. Move and set in place. However, if this is also left for 30 seconds, it will return to the same magnification position as specified by the key 30-1.

Also, after the number of copies is set repeatedly using the key 22, the process returns to one copy in the same manner. After setting various condition modes in this way, the standard mode is returned to when 30 seconds have elapsed since the last setting operation.

Figure 3 shows the control circuit constituting the embodiment.
- The RAM in the figure is used to display key manual data, and the sequence contents of standard mode set operations and copying process operations are ordered in advance and are incorporated into each address, and the RAM for setting addresses is the number of copies to be made. A read/write memory for storing temporary control signals during process control, and a memory for storing a set of binary codes, as shown in FIG. 9 in detail.
A set of multiple flips and flops is made up of multiple sets, and an arbitrary set is selected by an address designation signal, and data can be written or read into multiple 7 flip-flops among them. In the figure, the address of the memory and its area is, for example, in the format of X'043'0.The last 1 digit number indicates a column, the 2 digit number indicates a row, and the 3 digit number indicates a memory chip. X'043' is an area for storing the data of the magnification ratio, and this data contributes to the designation of the lens magnification and the display operation of the display 31. Also, X'033' is the data specified by the magnification ratio Φ-. This is the area where the
When it is the same size, it is X'033'.

The 2 associate data of X'043' is 1 at 0000.0.7 times
It becomes 000. ! '062' is an area where 1000 is stored when there is no paper in the specified paper feed unit. Table 1 shall be followed for each data area below. Also, the numerical data to be displayed on the segment display @ 23-1.23-2 is stored in the am'r and aopy areas, and the key-entered data is simultaneously stored in '018' and X'OIO'. 0VA (0) is a 3-digit working register that is used to run a timer that contributes to returning to standard mode, and W^ (&) to W^ () are registers that contribute to storing other temporary data. . Table 2 shows the relationship between key human power and stored data.

When there is no KEY input in Table 2, F, or 0000, is stored.

Ilo 100-I10700 C Input/Output 7] Device-1'
Generates data input signals from keys, keys, etc., and signals for driving solenoids. Figure 4-1.4-5 shows KI10 and its peripheral circuits ・Ilo 100 to 600 are well-known circuits including latch circuits and gate circuits, and here pPD7
In l10100 in Figure 4-1, output port 0 is connected via a DC driver to the drive circuit of the motor M that rotates the screen drum insulating drum, and connected to the high voltage transformer for each corona discharge.・The input boat person uses the line receiver (
Connect the input via the input interface (input interface). In addition, a switch SW that is linked to the main switch SW is input connected to the input boat C to contribute to determining the on/off state of the SW.Furthermore, the boat D is connected to the circuit of the thermistor Th1 that detects the temperature of the fixing heater. , contributes to wait time up determination.

Figure 4-2 OIlo 200 K k ite, Oo
-01c each has a doubler voltage M1. Connected to the outlet switching motor M2 via the same input circuit as M above, ◎0. ,0
．． are each variable magnification lens SL,, magnification lens SL! Said office lady.

are connected via an input circuit similar to
.

RD, (Go, 0.6, 0.7 times) K% said input B
It is connected like a boat and contributes to the magnification set. 1.1 in l10300 in Figure 4-3. I, TP of the Hall element HIO provided at the exit for determining whether the output is a tray or a sorter, 8P ()ray, sorter)K are connected as described above, and the output (output LOWEN)K contributes.

0, ~Os are lamps L, ~Lm (medium) for displaying gradations.

(dark, light) OLo, 6, L O, 7, for variable magnification display.
Connected to Ll, 0 (0.6x, 0.7x 9x) @ In l10400 in Figure 4-4, 0° to O3 are lamps LS and LT for paper feed slot display and exit display .

0 units connected to LD, LP, LC (each sorter, tray, deck 9 without paper, cassette). is the copy mttt-
Connected to a switch that detects insertion of a key counter for counting. ■, is connected to a well-known optical sensor that detects the out-of-paper state in the cassette, D, and K. Figure 4-5 shows input signals from each of the above keys.
In the figure, MAT is a well-known matrix whose intersection is energized when the key is turned on, and T0 to T are the display 23.
-1.23-2 digit selection, time division scan signal MKR for scanning the matrix circuit.

In @MAT, ~ is a board for inputting matrix signals due to key-on, and Zoo ~ 106 and 107 are transistor driver circuits as shown in the figure.
rOJrlJ...--"9" is a numeric key, 0LFi Cree-'r'F-1oopy Hakohi p start key, lfl
, 0.6゜0.7 is the variable magnification key, dark, medium, and light are medium shades.
1DBO.

OAK, 8P, TP are de, ki, cassette, sorter.

This is a tray specification key. This device is a well-known device having a buffer register for key entry, a shift register for storing display data, a digit signal generator for displaying display data in a time-division manner, etc. 1. Here, an NPD 757 is used.

OPU is 1 for specifying the address of the above memory and input/output device.
one or more registers AO, PO, and one or more registers A, B, O, D for primary storage;

1 arithmetic circuit ALU of the control section has overflow hit OVF, PRO, OFT data signal line, decoding of input data, addition/subtraction logic control to process data, such arithmetic circuit ALU has data decimal correction, addition, exclusive logic It has a Japanese function. Note that the contents of the register can be rotated to the right (shifted to the right) or rotated to the left (shifted to the left).

The CPU has the above circuit and is connected to the external circuit through a plurality of lines. To give an overview, the OPU first specifies the fl address where the sequence is programmed, the contents of the specified address are read into the OPU through the data signal line DBI, the CPU decodes this, and turns on the power according to the decoded contents. In chronological order, at one time the data was processed within the OPU itself, at another time the data in the CPU was stored at a specified address with number N, and at another time the data was stored at a specified address with number N. Input data into the CPU,
At some times, the data in the CPU is output to the output parts l10-1 to I1.
Sequence control is performed by outputting to the signal line DB3 of the input/output section 0-4 or inputting the contents on the signal line DBa of the input/output section into the CPU. The data is stored in the memory ROM shown in FIG. This is a flowchart showing the control program, and when the sub power switch provided in the main body is turned on, the control unit including the CPU is powered on, the program of HOf14 is leaked, and processing is started (19 TAT).

In step 1, all data in RAM 4 bits, 256 words, address 9 x'ooo' to X'OFF' is cleared. Then, it is determined whether the switch SWt is on or not, and if it is on, step 2 is executed. This determination is to check whether the input port If of I10 port) 100 (Fig. 4-5) is 1 or not. This is done by repeating the shift and determining whether 1 is set in the first bit.

Step 2 is to first write necessary data into a predetermined location in the RAM in order to set the image forming conditions to the standard mode.The contents of the data are shown in Table 1.

In the standard mode shown in Table 1, when the redundancy is 1x, the exit is the tray, and the copy density is medium, the RAM data is (X'043
') is a number other than 0 + (X'033') 2>10° (X'053') Ka0, (X'042') 2>
f 2 , (X'032') becomes a number other than 2. In addition, (X'043') is the data of address X'043' ◎ Regarding step 3, the deck has four times as many sheets of paper as the cassette (approximately 2000 sheets). A4 size) are collected on a deck and fed from the regular deck. Here, first, in order to select a deck as the standard mode, the presence or absence of paper on the deck is checked. Ilo 4
Sense 00 and check the paper detector 61. If there are 9 papers, set the data of the deck in RAMK.
052') is set to 8 (3-1). When there is no paper in the deck, select the cassette, check the paper detector 60 to see if there is paper in the cassette, and if there is no paper, the paper out lamp 33t will light up, so set % (X'062') to 8, paper If there is paper, set it to O (3-3). If there is paper in the cassette, set X'052' to 0 to specify cassette or g (:l-
2).

Step 4 is to display the copy setting counter 23-1 to 1 and the copy number counter 23-2 to 0.
t O, middle position (X'03B') t O, - position (X'0
30') t-1 Toshi, Kara 7 Ta C0PY O 100 CX'04 people') 0° medium (X'04B') Ol
Set the - position (X'040') to OK cent.

In step 5, 4 bits of the data set in steps 1 to 4 are output simultaneously. Display data (X'022") is (X'032')
+ (X'052') + (X'062') is added and output to l10400, which lights up the paper out lamp, deck, and cassette selection display lamp.In the case of standard mode, 6 Tsuma Shihe~O8 is 0
110 is output and the deck indicator lamp and tray indicator lamp light up. (X'023') is (X'033'
) + (X'053') Perform the operation of Shichigeku #→ Content 1c L Te (X'023') 'lX'300
' OIlo yj (- Turn on the 1x lamp and medium density lamp by outputting to
PA of X'020' and X'03 people'-X'030'
M contents Key & Display Ilo X'70
Output to address 0' and set counter 23-1.

001 and 000 are displayed on the copy counter 23-2, respectively. tLhaX'olo',! = X
'018' KFlf-Evening XF' is inserted. If there is any input, the data will be stored in RAMX'010' and X'0.
18', the details of which are shown in the flowchart of Figure 6-1. This flowchart is based on the IIPD 757 specification, and each step corresponds to one step stored in the ROM.

In step 7, the input data stored in step 6 is set to the necessary address in the RAM according to the content. For example, if you turn on the magnification 0.7 key, (X'018') becomes 9.
So, shift (X'02B') to X'02A',
(X'020') to X'02B', X'0
20' Set K9. Then, at the same time as these settings are made, various modes are displayed in the same manner as in step 5. In step 8, proceed to step 6.7.

Determine the loaded paper source (X'052'), tab #)0
When it is 4, it is determined that it is a cassette, and when it is 4, it is a deck, and the status of the paper detectors 60 and 61 in each section is checked.

60.61 is an Ods that detects a change in light reflected by paper, and when there is no reflection, it is considered that there is no paper. and step 3
Turn on or off the paperless lamp as shown below.

In step 9, it is determined whether or not the positions of the lens system and mirror system are at the designated positions.If they are not at the designated new positions, the positions are changed (FIG. 5-2).

Regarding step 16, compare the RAM data from step 7 with the data from Ilo 200 (D th boat. In other words, determine whether (X'033') and (X'043') of RAM are equal. Now 0.
If 7x is specified and the lens system position is 0.7, (X'033') is 1000, (X'043'
) are 1000 and are equal. When the lens system position is equal to the same magnification, l104200 I! Since (X'043') is 0000, they are not equal, so change the lens position. First, change the magnification motor M.
, turns on the rotation locking solenoid SL.

Turn on and move the optical system. Sensor RD7 place I! When the magnet attached to the lens in the trench is il), Ilo of 200 becomes l, so motor M8. Solenoid SL is turned off by 1@Also, the data is set in X'043'@In step 10, when the lens system is at the specified magnification change position, the state of the power switch SW is determined and it is determined whether the control should be restarted. It is done by sensing l10100's porte・S
When W is off, return to the start and clear the RAM.

In step 11, it is determined whether the paper exit position is at the specified position. Perform exit change when not at specified position (Figure 5-2) At step 18, Z? RAM O day/ (X'032') and l1 by tp7
Data from the 0300 report (X'042') Tiger comparison. (X'032') (X'042')
When the time is equal, the tray is specified, and now it's on the tray! :t,;! + (X'032') F0010
, (X'042') is equal to 0O10, but X'
When 042' is 0001 in the sorter, they are not equal, so the outlet is changed.0 First, turn on the output motor pigeon and rotation lock-n-lenoid 8L, 1 to move the outlet from the sorter toward the tray. As the belt 190 rotates, the magnet provided on the fixed shaft approaches and the tray sensor 70 turns on.
; Then the boat 10300 1. Input φ1 to determine that the tray position has been reached. Then, turn on the motor pigeon solenoid SL and set data to X'042' of the string tile.

Step 12 is to determine whether a key counter is inserted or not.
Ilo 1 Checks whether the device has started up (completed) or not.
00 specification and sense to check whether copying is possible.O When copying is possible, exit, and after changing the magnification position, proceed to step 20030 to set the standby timer. Steps 13 and 13 are for determining whether the copy key 21 has been entered, and steps 7 and 7 are used to determine the corresponding RAM data. Let's do it.

If the copy key is not manually operated, the process proceeds to step 14 and checks whether another key is entered (X'018').

Control is performed by checking whether (X'010') is F or not. If there is still no evidence that the key has been manually operated, proceed to step 15◎
If you repeat the routine so far about 3000 times, the steps up to this point are about 1000 and each step is about 10μ, so 30 seconds will pass. - Store it (step 20), decrement it by 1 every time step 15 is executed (15-1), and when it becomes 0, proceed to initial step 8TAT, clear RAM'fc and set standard mode. (Step 2).

In step 14, if a key entry is made during this 30 seconds, step 20 is executed again and the 30 seconds are
WA (0) and perform the above subtraction process 0 Figure 6-2 shows the details of steps 14 and 15 0 If the copy key is turned on during this time, the process advances to step 21 and the drum motor M, high voltage If a jam occurs during logoby when the transformer is turned on and the copying operation is started, or if the deck or cassette runs out of paper, the motor M1. The high voltage transformer is turned off, but this step 21 is not skipped. Therefore, the pasting M data is held and the display such as the number of sheets remains even if the power switch is turned off.

The counter of item M is set to 0 at the end of each copy cycle (each time paper is fed).
OPY is increased by 1, the value is displayed on the display 23-2, the counter 8ET is compared with the value, and if they match, the main motor M8. Turn off the high voltage transformer. Then, proceed to step 2, set the timer 30 seconds, turn off 0M8, and exit step 21.
This is after passing through 4°65. Also, even if clear Φ- is turned on when there is a jam or paper is out, this step 21 is skipped and the setting is made for 30 seconds. After setting this 30 seconds, if you do not want to enter the copy key or other keys, or if you have made a key entry and do not want to make a next key entry, return to the 8TAT step and return to the 9 standard mode. If you turn on the copy key within this 30 seconds, copying will be performed based on the previous set number. In Figure 6-2, microsteps 14-1 to 14
-4, the data of X'018', that is, the same size 90.7
, 0.6, shading key, clear, cassette, deck,
The input of the sorter and tray key is determined, and in 14-3, the exclusive OR of the data stored in AOO and AOK is taken to determine A.
It is stored in OO, and it matches with F and Aoo becomes O @ Therefore, execute 14-5 to 14-8 and do the same KX'o1
Determine the data of 0' and look at the numeric keys. Microsteps 15-1 to 15-3 are X'OO1'-X'003'
is indicated as WA(0) as a 3-digit working register, this value is decremented by 1, and the decremented value is stored in WA(0)K again. digit is 0
Whether or not, 15-7 to 15-9° 15-10-15-12
is to determine whether the middle and lower digits of %%'A (0) are O or not and return to the start. Figure 8-1 shows the variable magnification mechanism, and the lens system 59. The mirror 15 is reciprocated by the rotation of the motor M. Also, depending on the variable magnification specification, lens 5
The position of the 9° mirror 15 is the same as that of the sensors RD 1 and RD 7.
, move in conjunction so that a predetermined optical path length is achieved at the RD6 position.

8L is turned off when the optical system is at a predetermined position and locked so that it does not move. Figure 9-1 is a time chart when moving from 1x to 0.6x. ◎When the key is turned on, the RAM ( X'03
3') is 4 and X'043' is O, so l10200
Set OK3 and turn on SL, , M.・The engineering of ρ200 is the Hall element RDI, RD7, R
When it is determined that D6 has become 8 (I, = 1), 8L.

Turn off M. Then, set X'043' K 4. Figure 8-2 shows the exit conversion moth structure, in which Pel 19 moves the amount of earth by the rotation of the motor pigeon.

In response to the exit designation, the belt 190 position is turned off and locked from movement when the sensor 70° exit is in the predetermined position.

Figure 9-2 is a time chart when moving from the tray to the sorter. - When turned on, RAM (X'03
2'). X'042') is different from that, so set O of l10200 and turn on 8L□M.
As described above, 8L,
.

This is to turn off the pigeon and set it at a predetermined exit.As described above, the present invention displays conditions according to various key manual inputs, and also clears the display when the process does not start within a predetermined time from the last key manual input. Since the display is in the standard mode, the image forming time can be reduced and image forming can be resumed quickly.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the image forming apparatus according to the present invention, FIG. 2 is a plan view of the operating section in FIG. 1, and FIG. 3 is a control circuit diagram in FIG. 1. The figure is the input/output circuit diagram of Figure 3, the control flowchart of Figure 5-1, %-2, and the detailed flowchart of Figure 5-1.5-2. , 7th - Strain, '%-
Memory ts9-P, L in Figure A 3 Figure A8-1.8-
Figure 2 is an operation time chart, and 14 in the figure is a tray. 18 is a sorter, 52 is a cassette, and 53 is a deck. 9 is a paper feed roller, 59 is a lens system, 21 is a copy key,
22 is a maki key, 28-1 to 28-3 are gray keys, 24.
25 is the exit designation key, 26.27 is the paper feed section designation key, 3
0-1 to 30-3 are magnification designation keys. 111 document (no change in content) Engraving of M7-2 drawing (no change in content) Engraving of drawing (no change in Saiyo) Procedural amendment form) % expression % 1. Indication of incident 1988 Patent Application No. 277481 2, Name of the invention Image forming device 3, Relationship with the case of the person making the amendment Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
”) Canon Co., Ltd. Canon Co., Ltd. (telephone 758-2111) 5. Date of amendment order (shipment date) April 22, 1985 6. Drawings subject to amendment 7. Contents of amendment originally attached to the application. Engraving of drawings (Fig. 2; Fig. 3, Fig. 4-1, Fig. 4-5, Fig. 5-1; Fig. 5-2, Fig. 6-1, Fig. 7-1, Fig. 8) Figure-1, Figure 8-2, Figure 9-1, Figure 9-2) / As shown in the attached sheet (no change in content)

Claims (1)

[Claims] an input means for inputting desired image forming conditions; a first display means for displaying the image forming conditions inputted by the input means; and a first display means for displaying whether or not the image formation is possible. a second display means, an instruction means for instructing the start of an image forming operation, and an image formation unit that is input by the input means if there is no instruction by the instruction means within a predetermined time after inputting the image forming conditions by the input means; a timer means for controlling the first display means to restore the image forming conditions to predetermined image forming conditions; An image forming apparatus comprising: a control means for operating the timer means after a possible state is displayed.