JPS61226448A - Picture imaging device - Google Patents

Abstract

PURPOSE:To enhance the ability of attaching operation of a recording medium made of a continuous paper sheet in a device for imaging a picture on the recording medium over the entire width thereof in one batch, by providing a guide member for positioning the recording medium on a transfer path when pinch rollers which separatably touch paper feeds, are separated. CONSTITUTION:A paper feed unit 300 in a picture imaging device is provided with upper and lower paper feed mechanisms respectively having paper feed rollers 320, 350 and pinch rollers 330, 360 which separately touch the former. The pinch roller 330 is journalled between right and left arms in a lower roller opening and closing mechanism 340, and is urged under spring force against the feed roller 320. Meanwhile the pinch roller 360 is also urged against the feed roller 350 under spring force by an upper roller opening and closing mechanism 370. Further, there is provided a guide member 380 for guiding both sides of the recording medium, upstream of the recording position, in order to position the recording medium on a transfer path when the pinch rollers 330, 360 are separated from the feed rollers.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to an image forming apparatus, and in particular, to a conveyance system for a recording medium in the form of continuous paper such as roll paper or fanfold paper, and a system for conveying a recording medium over the entire width of the recording medium. The present invention relates to an image forming apparatus equipped with a recording means for forming an image.

[Prior Art] Conventional image forming apparatuses of this type include those disclosed by the applicant in Japanese Patent Application No. 59-101508 to No. 59-1 (0512).
Equipped with a recording means that has a transport system and a liquid jet recording device that can be easily separated, and a recovery means that performs ejection recovery processing of the liquid jet recording device, it facilitates the work of replacing the recording medium and the maintenance work of each part in the separated state, and connects Image forming apparatuses have been proposed in which various parts are properly positioned to form high-quality images.

However, in such an image forming apparatus, sufficient consideration has not been given to a structure that facilitates operation when a recording medium is attached.

[Purpose] An object of the present invention is to provide guidance at the time of starting conveyance of the recording medium in conjunction with the opening operation when the pinch roller is released from the conveyance roller for conveying the recording medium during conveyance and the recording medium is loaded. It is an object of the present invention to provide an image forming apparatus in which a member guides the image side of the leading end of a recording medium, thereby making it easy to operate when loading the recording medium.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

1.1 Appearance Figures 1 and 2 (A) and (B) show an example of the schematic configuration of the image forming apparatus of the present invention. This example shows a host system that generates image information and control signals related to recording. This is an image forming apparatus that can be connected to.

In these figures, reference numerals, names of parts, functions, and meanings correspond as follows.

(Margins below) 1.2 Inside (1) Inside of the recording system unit FIG. 3 is a perspective view showing an open paper feed unit 300 to show an example of the internal configuration of the recording system unit 100, and reference numerals and various parts are shown. The names, functions, and meanings correspond as follows. Note that in this configuration, the recording head 110
, the control system including the cartridge tank 120 is disclosed in, for example, Japanese Patent Application Nos. 58-21131 to 5B-24 by the applicant.
The inkjet printer disclosed in No. 4138 can be used.

(Margins below) (2) Inside of the paper feeding unit FIG. 4 is a perspective view showing the paper feeding unit 30G opened to explain the internal configuration of the paper feeding unit 300.
The reference numerals, names of parts, functions and meanings correspond as follows.

(Space below) (3) Inside of controller unit z FIGS. 5(A) to 5(C) are explanatory diagrams for explaining an example of the internal configuration of the controller unit 200. In this example, the controller unit 200 is arranged below the recording system unit 100. In addition, the controller unit 200 is made independent of the recording system unit (10G) to facilitate maintenance work, and as described later, when ink leaks inside the recording system unit (10G), the leaked ink can be plugged. The controller unit 200 is protected from ink leakage by providing a blocking plate to stop the ink and a member for guiding the ink to the drain tank 800.

In FIGS. 5(A) to (C), reference symbols and names of each part,
Function and meaning correspond as follows.

(Margin below) 2.1 Basic operations Next, the basic operations of each part of the device will be described.

(1) Turn on the power 0N10FF a, ON Paper feeding unit) With the 30G closed (as shown in Figure 1), turn the power switch 15G (L) upwards. At this time, the BUSY lamp (described later) will light up, and A check is made.

If there is no abnormality, the BUSY lamp will turn off after about 5 to 10 seconds, the ON LINE lamp will turn on, and the image data will be ready for printing.

At this time, if head unit 11G has 0 caps
is automatically capped if it is not joined.

If an abnormality is found, an error code will be displayed on the display panel.

If the paper feed unit 300 is placed, the head unit 11G will not be capped automatically even if it is not capped, and it will be considered that the cap is placed no matter where the cap is placed. UP/DO
Press the WN switch to close the cap.

b, OFF Turn the power switch 150G downward.

(2) ON LINE mode and OFF LINi! Mode ON LINE mode is when the ON LINE lamp is lit, OFF LINE mode is when ON LI
This refers to the state in which the NE lamp is off.

When in the ON LINE mode, form feed, initialization, and printing of image data are possible under the control of the host system.

When in OFF LINE mode, paper feed, check print,
Recovery processing is possible.

Normally, 0NL is set by pressing the ON LINE switch.
INE mode and OFF LINE mode can be switched, but in any of the following states, OFF LIN mode
It is assumed that switching from E mode to ON LINE mode is not possible.

*When BUSY77 is lit.

- When the paper feed unit is open.

・When the head is not capped.

eWhen it is displayed that an error has occurred.

It is assumed that the device is in 0NLINE mode immediately after the power is turned on.

(3) How to set paper Figures 6(A) to 6(C) show examples of mounting operations when fanfold paper is used as the recording medium.

・Make sure the power is turned on.

- Check that the flap 400 is open.

- Open the paper feeding unit 300.

・Place paper P on each deck section 3!0.

The orientation is such that the black rectangular mark (TOF mark) is on the back left side of the paper (Figure 6 (A)).

- Open the lower paper feed mechanism (Figure 6 (B)).

- Paper P is sent to the lower part by the roller 320 and the lower pinch roller 33
0 (Fig. 6(C)).

- While opening the upper roller 350, pass the paper P through the upper roller along the paper guide 380, leaving the paper outside the flap (FIG. 6(D)).

・Close the lower paper feed mechanism so that the paper does not slacken.

-Press the FF switch to feed the paper.

If the paper is placed in the wrong direction,
↑Since the OF mark is not found, an error occurs and the program stops.

・Paper feed unit) Close 30G.

- Check that no errors are displayed on the display panel.

(0 Display Panel Operation FIG. 7 shows an example of the configuration of the display panel 500.
Here, the correspondence between the reference numerals and names of the switches, their functions, and when they are activated, and the correspondence between the reference numerals and names of the indicators and their meanings when they are lit are as follows.

FIG. 8 is an explanatory diagram for explaining the display contents of the 7-segment display 550. In this example, the first digit 552 of the three digits is used as a status display section to display the status, and the bottom two digits 554 are used as an error display section to display error details, and the display shown in the figure is made in response to the status and error. shall be Also,
The decimal points 555, 5513 and 557 light up when the system starts up normally, when there are multiple errors, and when the recording head assembly 130 is not installed, respectively.

(5) Switch operation inside the main body Figure 9 shows an example of the switches and indicators arranged inside the device. The correspondence between the reference symbols on the display and the meanings when they are lit is as follows.

2.2 Replenishment and replacement of consumables Next, the manner of supplying and replacing consumables is as follows.

(1) Removing paper P This can be done by the following steps.

・Make sure the power is on.

- Push the FF switch 520 to feed the paper P until all printed parts of the paper P are fed out of the flap 400.

・Cut paper P along the perforations.

- Take out the paper P from the stacker 700.

Confirm that no error is displayed on the own display panel 500.

(2) Replenishing ink This can be done by the following procedure (see Figure 3).

・Open paper feed unit 30G.

・Press the cap UP/DOWN switch 11 to go to 2
Lower the cap 140 that protects the cap 110 (once you press it, the cap will fall back to its normal position even if you release your hand).

1. Pull out the 12G cartridge.

Fist and insert a new cartridge. Cartridge 120
The arrays of B, 120G, 120%, and 120Y are black, cyan, magenta, and yellow from the left.

・Cap ■Press the P/DOWN switch 11 to raise the cap 14G (once you press it, the cap will rise to the normal position even if you release your hand).

- Close the paper feeding unit 300.

Note that after lifting the cap, ink is sent from the cartridge tank to a fixed tank (not shown) by a pump.

Once this stationary tank is filled, the pump will stop and printing will be possible. As this fixed tank, for example, those disclosed in Japanese Patent Application No. 58-244131 to No. 58-244138 can be used.

(3) Replacing the drain tank 800 FIGS. 10(A) to 10(C) show an example of a procedure for replacing the drain tank 800, and the process can proceed as follows.

a. Loosen the screw 852 (Fig. 1θ (A)).

b. Raise the lever 854 (Fig. 10(A)).

C. Pull up the drain tank 800 (Fig. 10 (
B)).

d. Pull out the drain tank cap 840 (10th
Figure (C)).

e. Install a new drain tank by reversing the procedure.

f. A new drain tank sealing cap 842 can be attached to the removed drain tank.

Note that in the figure, 820 indicates a waste ink tube.

2.3 Actions to be taken in case of printing defects The causes of printing defects that can be avoided include the following.

■The ink inside the head tip (nozzle) has evaporated and the viscosity has increased.

■Air has entered the nozzle.

■Air has accumulated in the liquid chamber that stores ink inside the head.

These can be removed with a recovery operation.

In order to perform a recovery operation, a cap 140 must be connected to the head 100, and an internal recovery switch 1 is activated.
This operation is initiated by pressing 2.

While this operation is being performed, the recovery processing lamp 13 is lit.

3.1 Details of Paper Feeding Unit FIG. 11 shows an example of the detailed configuration of the paper feeding unit 300. In FIG. can be assembled into. 30B is recording unit 10
This is the panel that faces this when connected to 0, and 1
Paper deck section 310, lower and upper paper feeding mechanisms, and their opening/closing mechanisms 340, 370.

The platen 392 and the like are exposed through the window 306A, and the surface 306B facing the unit 100 serves as a gap reference surface for a head unit 110 (described later).

302A and 302B are parts having rotation wheels for rotating the paper feeding unit 300 with respect to the recording system unit 100. 1450 is a senna for detecting connection with the recording system unit 10G,! Reference numeral 420 is a locking mechanism for ensuring secure connection.

Further, 3000 is a motor unit for driving the rollers 320, 350, 325 is a lower feed roller transmission mechanism including a pulley Gl, a bearing, a retainer, etc. for transmitting the rotation of the motor 3000, and 355 is a pulley G2. Bearings, retainers, etc. and other slip plates 352
This is the transmission mechanism of the upper feed roller including.

(1) Paper deck section 310 FIG. 12 shows an example of the configuration of the paper deck section 310.

Here, 311 is a recording paper stacking section, and a side plate 311A serves as a reference surface for initially regulating the conveyance path;
A bottom plate 311 provided with a convex portion 311B to obtain a stable stacking state of paper even when the paper feeding unit 100 opens and closes.
In the case of 0 pieces having C, etc., the bottom plate 311G is tilted toward the back side 3110 (the side opposite to the side where the paper is attached),
The recording paper is made to hang on the back side 311D. This can prevent the recording paper from falling off the stacking section 311 due to the impact caused by the opening/closing operation of the paper feeding unit 300.

Further, in the figure, reference numeral 315 denotes a press plate for the recording paper, which presses the recording paper toward the side plate 311A by a spring 314 stretched between it and the stacking section 315 and biased in the downward direction in the figure.

Further, 31B is a screw for holding the position of the presser plate 315. As a result, the position of the recording paper is regulated at the most upstream side of the conveyance path, and a stable conveyance state can be obtained from then on.

(2) Lower paper feed mechanism and lower roller opening/closing mechanism No. 13
The figure shows an example of the configuration of a lower paper feeding mechanism and a lower roller opening/closing mechanism.

The pinch roller 330 for pressing the recording paper P against the lower paper feed roller 320 is provided with an elastic member 332 near its axial center, and the pinch roller 330 obtains a nip amount with the roller 320 at that part to pinch the recording paper P. Make sure you get the state. 34
1 is an opening/closing lever used to separate the pinch roller 330 from the feed roller 320.

342 is a side plate for supporting the pinch roller 330 at both ends thereof, and allows the side plate 342 to rotate around a shaft 343. 344 is a pinch roller arm having arm portions 344 and 344B, and is supported by a pin 345 protruding from the side plate 342 between the arm portions 344A and 344B, and is rotatable around the pin 345. Then arm 344
The pinch roller 330 is supported by the arm portion 344A, and a spring 34B is stretched between the other arm portion 344B and the upright portion 342A of the side plate 342.
A pressing force on the feed roller 320 of 0 is obtained. Further, a skew prevention roller 338 is provided on the side plate 342 at a position immediately before the recording paper P is pinched between the lower paper feed roller 32G and the pinch roller 330. This skew prevention roller 3
By bringing 38 into contact with the recording paper P, the single paper deck section 3
Supports the weight of recording paper P up to 10, and supports recording paper P
The winding around the roller 320 can have a large corner.

Furthermore, operate the opening/closing lever 341 to move the side plate 342 to the shaft 3.
When rotating around 43, pinch roller 3
30 and the skew prevention roller 338 can both be removed from the feed roller 320.

The opening/closing lever 341 is rotatable around a pin 342A protruding from the pinch roller side plate 342, and is provided with a button 341A at one end that the operator presses when releasing the pinch roller 330 and the like from the feed roller 320. At the end, there is a claw portion 341 that engages with a lock pin provided on the base 302.
Provide B. In addition, by tensioning a spring 348 between the button 341A of the lever 341 and the side plate 342,
The lever 341 is given the habit of turning counterclockwise in the figure, so that a stable state of engagement is maintained.

In addition, the recording system unit side of the side plate 342 is connected to the cap 140.
According to the engagement, the side plate 342 rotates clockwise in the figure, so that the feed roller 320 and the pinch roller 330 are engaged.

As a result, even if the operator forgets to close the lower paper feed mechanism after loading the recording paper P, the lower paper feed mechanism will close as the cap 140 moves, which will be described later.
In this part, it becomes possible to prevent the recording paper P from jamming or the like.

(3) Recording Surface Forming Section FIG. 14 shows an example of the configuration of the main parts of the recording surface forming section 390 including a platen 392. Here, 393 is a hole provided in the platen 392. The recording paper P is attracted to the platen surface by the fan 390F to form a recording surface. 395 is the base 302 and panel 30
spring for rocking the platen relative to B, 394
39B is a spring mounting portion provided on the platen 392, and 39B is a guide hole for a pin 303 protruding from the base 302. Further, 387 is a sensor that detects recording paper.

As described later, the recording system unit 100 and the paper feeding unit 3
00, the pin provided on the front side of the recording head unit 110 hits the panel 306 having a reference surface, and at this time the assembly 130 swings to keep the nozzles of the head unit 110 parallel to the reference surface. It will be done. At the same time, the platen 392 follows the rocking of the assembly 130 via a projection provided on the assembly side by the spring 395, so that the recording surface of the recording paper P regulated by the platen 332 and the nozzle face each other with an appropriate gap. Become.

(0 motor unit Fig. 15 is a motor rotation shaft) An example of the configuration of 3000 is shown. Here, 3002 is a motor, and a roller transmission mechanism that transmits the rotation of the rotation shaft 3004 to the lower part via a pulley 300B and a bell) 3008. Pulley G20 related to 325
to communicate. G3 is concentric with pulley G20 and pulley G
A roller transmission mechanism 3 which is a pulley with a diameter smaller than 20 and sends the rotation of this pulley G3 upward via a bell) 301G.
55 pulley G2.

Here, by appropriately selecting the tooth number ratio of each pulley, the upper feed roller 350 side has 2 to 3 teeth more than the lower feed roller 32G.
% higher rotational speed is transmitted.

(5) Upper feeding roller and its transmission mechanism FIG. 16 shows an example of the structure of the upper feeding roller 350 and its transmission mechanism 355, where 353 is the extension shaft 3 of the roller 350.
Bearings 352A and 352B provided in 51 and rotatably holding pulley G2 are respectively connected to pulley G2.
2 and a slip plate provided on the shaft 351, which slide on a ring 354 and a pulley G2 fixed to the shaft 351, respectively.Thereby, the rotational movement of the motor rotating shaft is transmitted through the slip plates 352A and 352B. At this time, the recording paper P is pulled up by the upper feed roller 350 under appropriate tension.

(6) Upper pinch roller and paper guide FIG. 17 shows an example of the configuration around the upper pinch roller 380. 3
821. Reference numeral 3822 denotes a member having portions 382B for holding the pinch roller 380 at both ends thereof, and portions 3821 for regulating the displacement of the recording paper P in the width direction when the recording paper P is loaded and when the conveyance is started. One of these members is always connected to the pinch roller 31 by a spring 372 (see FIG. 11) included in the upper roller opening/closing mechanism 370.
10 toward the feed roller 350, and opens the upper paper feed mechanism in response to operation of the opening/closing lever 374. These movements are performed by the connecting bar 384
It is also transmitted to the other member 382 by. In this state, the operator can mount the recording paper P.

At this time, the leading edge of the paper is guided and positioned at an appropriate position on the conveyance path by the guide 380 and portion 382.

(7) Paper feeding unit cover FIG. 18 shows an example of the configuration around the paper feeding unit cover 308, where 308A, 308B and 308C are
The output port for the recorded recording paper P (the mounting port for the flap 400), the mounting port for the display panel 500, and the mounting port for the handle lever 1400, respectively.

410 is a flap lever for rotating the flap 400 around the shaft 412 to open and close the outlet 308A;
420 is an opening/closing control mechanism that regulates opening/closing thereof.

510 is a mounting member for mounting the display panel 500 to the mounting opening 308B.

A stacker rail 710 is provided on the lower surface of the cover 308, and engages with an abutting portion (described later) when the stacker 700 is moved and positioned in directions F and B. Also,
72G is a member for forming a groove for guiding the movement of the stacker 700, and a mounting portion (described later) of the stacker 700 is received in the formed guide groove.

(8) Flap opening/closing operation Fig. 19 (A) and (B) show the flap opening/closing control mechanism 4.
20, where 422 is the flap 40
The flap stay is rotatable around a shaft 402 provided at 0, and has a bent portion 422A and a cam hole 422B. A rotor 424 is rotatable around a shaft 432 provided on a base 430 fixed to the cover 308, and has an ear portion 424A that can be engaged with a bent portion 422A and a cam hole 42.
It has a pin 424B that engages with the cam surface of 2B.

Figures 20 (A), (B), and (C) show a state in which the outlet port 308A is closed, a state in which the flap 400 is rotated to a predetermined position, and a state in which the flap 400 is locked and the outlet port 308A is opened. Indicates the condition.

When the flap 400 is rotated clockwise around the shaft 412 from the state shown in FIG. 4A to the position shown in FIG. The rotor 424 rotates counterclockwise in the figure around the shaft 432, and is in the state shown in FIG.
:) When the flap 400 is rotated in the closing direction and reaches the position shown in FIG. 20(C), the rotor 424
The ear portion of the flap stay 422 engages with the bent portion 422A of the flap stay 422, and this engagement prevents further rotation of the flap 400 (counterclockwise in the figure). That is, at this time, the flap 400 is locked, the delivery port 308A is opened, and the recorded recording paper P can be sent out in this state. During this transmission, the operator accidentally opened flap 4.
Even if you press 00 or there is vibration, the flap 40
0 is locked, the outlet 308A will not be blocked.

In addition, when closing the outlet port 308&, the flap 4 is removed from the state shown in FIG.
00 in the clockwise direction and positioned at the position shown in FIG. 5(B) to release the locked state, the closed state as shown in FIG. 2(A) can be obtained again.

(9) Installation of the stacker is an operation. FIG. 21 is a perspective view of the paper feeding unit 300 seen from below to explain the installation of the stacker TOO. Here, 722 is a guide groove formed by the member 72G;
Reference numeral 750 indicates the mounting part of the stacker 70G.

The stacker 70o is sometimes installed in the state shown in the figure.
50 into the groove 722, and then rotated 90 degrees to prevent the attachment part 750 from falling out of the groove 722 and engage the abutting part of the stacker 700 with the stacker rail 71G.

In this state, the stacker 700 is movable in directions F and B in the figure, and the stuff cuff 0G can be positioned on the F side and the B side, respectively, when the device is in use and not in use. Therefore, when not in use, the stacker 70
0 can be stored under the paper feeding unit) 300, so the volume of the device can be reduced.

(10) Structure of stacker FIG. 22 shows a vertical cross section of the stacker 70G attached below the paper feeding unit 300 when in use (when projected forward).

As shown in FIG. 22, the stacker 700 includes a support arm 701 rotatably supported on the upper part of the stacker body, and a guide member 702 attached to the support arm 701. The support arm 701 is a paper feeding unit when using the stacker)
30G and set the guide member 702 in a predetermined position. That is, in this set state, the downward extension line 70 of the inclined surface where the paper feeding port is located
3, the guide member 702 is located inside. Further, the guide member 702 is formed into a round surface. Furthermore, the horizontal distance d between the vertical front surface of the paper feeding unit 300 and the guide member 702
is in the range of 10 to 25 mm. According to such a configuration, 1 continuous recording paper such as recorded fan-hold paper is sent out from the outlet and first passes through the guide member 70.
While being reliably guided by the curved portion of No. 2, the paper falls into the stacker 700 through the gap between the guide member 702 and the front surface of the paper feeding unit 300, and is deposited there. The reason why the distance d is numerically limited as described above is that within this range, the recording paper can be guided into the stacker extremely stably, that is, without protruding outside the stacker. Note that the guide member 702 can be rotated downward as shown in FIG. 22 and made unusable.

3.2 Paper feeding unit locking mechanism and handle lever (1) Locking mechanism FIGS. 23 and 24 respectively show the paper feeding unit 3
Lock mechanism 142°8J provided on the upper and lower sides of 00
Cbi14301? Reference numerals 1422, 1422, and 1432 designate lock levers that are rotatable around shafts 1421 and 1431, and have pawls 1422A and 1432A that engage with a locking member provided 100 degrees apart.

Spring 1423 and 1433 rotate the lock levers 1422 and 1432 in the direction of engagement, respectively. 1424 and 1434 respectively represent the axis 142
1 and the claw 1422A and between the shaft 1431 and the claw 1432
A, and connect these pins to the wires! 425 and 1435 to the handle lever 1400. That is, the handle lever 14
When the wires 1425 and 1435 are pulled downward and upward, respectively, in response to the operation of 00, the lock levers 1422 and 1432 rotate to lock the paper feeding unit 300 and the recording system unit 100. It will be canceled.

(2) Handle Lever FIGS. 25 and 26 respectively show an example of the configuration of the handle lever 1400 and its transmission portion.

Here, 1401 is an operation handle, and a transmission shaft 141
It has a pin 1402 that can be connected to 2. 1403 is a member having a mounting portion 1403A to the handle lever mounting hole 308C and a flange portion 1403B; 1404 is a sealing member provided on the flange portion 1403B; 1405 is a member having a movement habit in the direction of the hole 308C to the member opening 03, and the sealing member 1404 is A spring 140B for tightly contacting the periphery of the hole 3080 is a retaining ring that prevents these partial pins from falling off from the pin 1402. That is, when the handle lever 1400 is attached, the seal member 1404 ensures dustproofness around the attachment hole 308C.

The transmission shaft 1412 is a bearing member! 414 and is rotatable in response to the operation of the handle lever 1400.

1415 is a wire connection member defined on the transmission shaft 1412, and has pins 1418 and 1417 that connect with wires 1425 and 1435, respectively.

3.3 Controller unit Figure 27 shows an example of the configuration of the controller unit 200. In this example, the peripheral edge of the opening 262 for ventilation and wiring in the top plate 260 of the controller unit is raised. A guide portion 284 is formed to prevent ink from flowing into the controller unit 200 even if ink leaks from the recording system unit 100. Further, a hole 288 is provided for draining leaked and accumulated ink, and a tube 828 is connected to the hole 28B. The tube 828 is exposed to the outside from the side plate 270, and the tube 82
0 so that ink flowing onto the top plate 280 is guided to the drain tank 800. This protects the inside of the controller unit 20G from ink leakage from the recording system unit 100.

In this example, the tube 82B is connected to the tube 820, but all the ink collected by the cap 140 is guided onto the top plate 280, and the ink is guided from the hole 288 through the tube to the drain tank 800. By doing so, the configuration of the tube system can be made extremely simple.

3.4 Recovery system (1) Cap opening/closing mechanism FIGS. 28 and 28 show the closed and open states of the cap 140 relative to the cap cover 150.
Here, 141A and 141B are rails that guide the vertical movement of the cap 140, and 142A is a cap! 40 is held rotatably around a vertical axis, and the rail 14
It is a holding member that can be slid along 1^. 143B is a member that connects and separates the sliding member provided on the rail 141B. Further, 825 is a waste ink reservoir provided below the cap 140, to which a tube 820 is connected.

According to this configuration, sufficient work space is secured during maintenance work of the cap 140, and such work becomes extremely easy. Further, according to this example, since the cap 140 is rotatable about the vertical axis, it is possible to prevent the nozzles of the head from being contaminated by color mixing of ink in the cap portion.

Further, in the figure, 145 is the front surface of the cap, and this front surface 145 is connected to the cam surface 34 of the pinch roller side plate 342 mentioned above.
2B, so that when the units 100 and 300 are connected while the pinch roller 330 is open, the lower paper feeding mechanism is closed as the cap 140 moves downward.

(2) Cap Cover FIGS. 30 and 31 are a perspective view showing an example of the structure of the cap cover 150 and the cap 140, respectively.
FIG. Cap cover 1
50 is given the habit of always moving toward the cap side by a spring 151. Further, 152 is a roller that can be secured to a portion 149 on the front surface of the cap 140. - These rollers 152 and the portion 14B are disengaged when the cap 140 is in a position facing the cap cover 150, and the spring 151 causes the force/(-150 to move toward the cap 140 and the cap 140 is covered. This allows the cap!40 to be protected from dryness, dust, etc.

Also, when the cap 140 is moved, the roller 152 is moved to the portion 1.
48 and the cover 150 retreats against the spring force, so the movement of the cap 140 is not obstructed by the cover 150.

(3) Capping of the head unit The capping process for the head unit 110 can be performed by the processing procedure described later with reference to FIG. In order to obtain an appropriate and reliable engagement state at the cap position, in this example, a recess 1 is provided on the front surface of the cap as shown in FIG.
On the other hand, as shown in FIGS. 28 and 32, a protrusion 138 that can fit into the recess 148 is provided on the head unit 110 side.As will be described later, the head assembly 130 is a cap. Since the cap 140 has a tendency to move to the side, when the cap 140 faces the head unit 110 through the process described later, the convex portion 13B fits into the concave portion 148, and the movement of the cap 140 is prevented at this position, and the head unit, , 110 can be obtained, and a state in which the cap 14G is accurately and reliably positioned can be obtained, making it possible to perform appropriate recovery processing.

3.5 Recording Head Assembly FIG. 32 shows an example of the configuration of the recording head assembly 130. As shown in FIG. What a protrusion! 34, and a protrusion 136 that can be fitted into the recess of the cap 140, and 13
8 is a fan for backing up the suction of the recording paper P onto the platen 392 by the fan 380F.

This head assembly 130 is attached to a movable base shown in Figure 33.

3.6 Recording head assembly in recording unit 1
33 shows the disassembled state of the support structure of the recording head assembly 130 in the recording system unit 100. 160 is a fixed base, and 17G is a movable base mounted on the fixed base 180 so as to be movable relative to the support structure. It is a stand. A recording head assembly 130 is fixed on a movable table 170.

On the underside of the fixed base 160 is a motor for driving the movable base 170 (
A drive mechanism 180 including a pulse motor) is fixed. A screw is fixed to the tip of the motor shaft of the drive mechanism 180 via a universal joint, and a guide mechanism 181 that converts motor rotation into linear motion is coupled to this screw. This guide mechanism 181 protrudes upward from an opening 181 formed approximately in the center of the fixed base 180, and extends a portion of the movable base 180 to the movable base 180.
Attach it to the bottom of G.

Therefore, the drive mechanism 1
The movable base 170 is moved by 8G.

The drive mechanism 180 is positioned and fixed to the fixed base 160 so that the movable base 170 moves back and forth in a direction perpendicular to the recording surface (when set) in the paper feeding unit 300.
The guide mechanism 18X is attached to the movable base 170. ``On the upper surface of the fixing base 180, guide rails 162 and 163 are fixed in front and behind the opening tet. The direction of this rail coincides with the direction of movement of the movable base 170.

On the other hand, on the lower surface of the movable base 170, guide rollers 171 and 172 whose axes are perpendicular are attached to the front and rear sides. The front guide roller 171 is located inside the front guide rail 162, and the rear guide roller 172 is located inside the rear guide rail 183. Therefore, the movable base 170 is regulated by these guide rails and guide rollers, and moves to a predetermined position. move on the road.

On the upper surface of the fixed base 160, the upper portion of a roller 164 of a first receiver fixed to the lower surface thereof protrudes through an opening 165. The axis of this roller 164 coincides with the moving direction of the movable table 170. On the other hand, when the movable table moves forward (when moving forward to the recordable position), the first receiver is connected to the roller 1B.
The second support fixes a roller 173 on the lower surface of the movable table 170 so as to face the roller 173. The axis of this roller 173 is perpendicular to the axis of the first roller 184. Further, the width of the front guide rail 1B2 is approximately equal to the diameter of the front roller 171 at its front portion, and the width of the rear guide rail 183 is approximately equal to the diameter of the backup roller 172 at its rear portion.
approximately equal to the diameter of the rear” roller at its front
Therefore, when the movable table moves forward, the front roller 171 is larger than the diameter of the front guide rail 182.
is restrained and fixed by the front part of the rear roller 17
2 is located at the front of the rear guide rail 183, the movable base 170 can swing around the front roller 171 in a horizontal plane. In addition, at this time, the first receiver on the fixed base side is on the roller 164, and the second receiver on the movable base side is on the roller 164.
173, the rocking motion can be performed more smoothly. Moreover, this swinging makes it extremely easy to position the recording head assembly 130 fixed to the movable base 170 with respect to the paper feeding unit side reference surface using the positioning front part of the recording head assembly 130.
It can be done smoothly.

On the other hand, as shown in FIG. 34, a locking mechanism 183 is fixed to the lower surface of the fixed base 180 for fixing the movable base 170 to the fixed base 180 when the movable base is retreated.

The lock mechanism 183 includes a solenoid 184 and a lock lever 185 that is driven by the solenoid and rotates in a vertical plane. The lock lever 185 has a groove 185A formed above its pivoting tip. Lock lever 18
5 is a fixed base l through an opening IH formed in the fixed base 160.
Projects to the top side of BO. An engagement bin 174 is fixed to the lower surface side of the movable table 170. This engagement pin 174 is positioned directly above the rotating tip of the lock lever 185 when the movable base 170 is retreated. Therefore, by operating the solenoid 184 when the movable base 170 is retreating, the engagement pin on the movable base 170 side is engaged in the groove 185A at the rotating tip of the lock lever 185. As a result, the movable base 170 (therefore, the recording head assembly 130) is securely supported by the fixed base 160 (
For example, the recording head assembly 130 is securely fixed to the recording head unit when transporting the apparatus, etc.).

When the recording head unit 100 and the paper feeding unit are connected, when the movable base moves forward, the positioning protrusion 132 on the front surface of the recording head assembly 130 moves as shown in FIG. 32 due to the swinging effect of the movable base 170 described above. 300 (paper feeding unit) 300. Further, in this state, the platen 3θ2 is pressed by a spring force against another positioning protrusion 134 on the front surface of the recording head assembly 130, so that the recording surface of the recording paper P regulated by the platen 392 is transferred to the nozzle of the assembly 130. be reliably positioned against.

4. Configuration of control system Figure 35 is a block diagram showing the electrical configuration of the entire image forming apparatus to which the present invention is applied. In this figure, He is a host that sends image information to be recorded via an optical fiber. It's a computer.

NO is a modulator/demodulator that performs mutual conversion between optical and electrical signals.

CG is a communication controller that has the function of extracting only image data from a data signal obtained from the host computer IC and sending it to the image memory IN and to the IMS.

This is the main processor including the Npti CPU, and performs various controls for the entire device.

Mechanical controller teardown including NC1*CPU,
In addition to communicating with the head assembly mechanism described later, a pulse motor Ml is used to feed the fan fault recording paper, an OC motor M2 is used to raise and lower the cap, and a pulse motor M3 is used to move the head assembly back and forth in the horizontal direction. Performs rotation control such as

The recording head unit has four recording heads (Y, N.

C, B), and forms an image on recording paper (fan fault paper) based on image data obtained from the image memories INN and IIIS. At this time, ink supply and recovery processing to each part of the head are performed by the head This takes place under the control of the assembly mechanism AM.

In this embodiment, each of the blocks described above is assembled on a separate printed board. The image memory has a storage capacity of 1 megabyte including the mask and slave.

Next, with reference to FIG. 3B, an outline of the operation of this apparatus performed when the power is turned on will be described.

First, when the power is turned on (step si),
Each unit having a CPU (MP, MO shown in Figure 35)
, AM) performs various hardware checks such as a memory check and a boat status check for each unit.

Next, main control of the entire device is transferred to the main processor MP.

- Check the presence or absence of recording paper, the presence or absence of ink, the opening/closing status of the door, the installation status of the recording head 110, etc. (Step S
3).

As a result, if it is determined that there is no error (step S0), the online mode is set and communication with the host computer HC is enabled (step S5).

In online mode, image data sent from the host computer is stored in the image memory IN)1. IN
When a predetermined amount of data is accumulated in S, the cap is lowered and the head assembly is advanced to the printing position to perform printing (image formation) (step S8). Even during this printing, the image data is continuously transferred to the host computer). (i.e. writing and reading of image data are performed asynchronously), such printing operations are performed repeatedly (step S) unless an error occurs (step S
7).

Also, if the switch is pressed while the online mode is set in step S5.

This device is disconnected from the host computer HC and enters offline mode (step S8).

Next, a test print, which will be described in detail later, is performed (step S9). The test pattern used in this test print is stored in a ROM (not shown). After printing a predetermined amount of test patterns, the test printing is automatically stopped.

Thereafter, in order to return the device to online mode, the switch can be pressed again (step S8 and S5).

If the occurrence of an error is detected in step S7, the device is set to offline mode (step 91).
G), this error refers to conditions such as a jam occurring, recording paper running out, and no ink.

In order to eliminate these error causes (step 511), the switch is pressed to return the device to online mode (step 512).

FIG. 37 is a flowchart illustrating the operation of this apparatus at the start of normal printing.

First, when the power is turned on (step 520), the recording head assembly is retracted to the home position (step 521), and then the cap is lowered (step 522).
), then the recording head assembly is advanced by a pulse motor and stopped at a print position corresponding to a predetermined number of pulses (step 523).

Then, head control for printing is performed (step 523).

No. 38 is a flowchart showing a control procedure for covering the front surface of the recording head assembly with a cap.

First, the recording head assembly is retreated to the home position. When the assembly reaches this home position, a predetermined output is obtained from the home position sensor (step 930).

Next, +24V is applied to the DC motor for driving the cap to raise the cap (step 531).

When the cap rises and reaches the predetermined cap position, a sensor output is obtained to notify that fact, and at that point the voltage applied to the DC motor is changed to +5V (step 532). Balances the torque of the motor and stops it.

Thereafter, a predetermined number of pulses are supplied to the pulse motor for driving the recording head assembly, thereby moving the assembly to the cap position (step 533).

Since the tip of the recording head assembly has already penetrated into the inside of the cap, the DC motor for driving the cap is disconnected from the power source (step S30).Thus, the cap descends due to its own weight.

Zero or more engagement with the recording head assembly completes the capping operation.

Next, communication between the host computer or host system and the present image forming apparatus will be explained.

9. Format and Type of Data (1) Command Data The format of command data exchanged between the host system and this image forming apparatus is as follows.

(The following is a blank space.) The types of command data sent from the host system to the image forming apparatus are as follows.

MEANING C0DE
0PERAND start print
P print 5peedstop p
rint E-to
p of form
H-feed
F-5tatus request
N-5entl com
mand again
N-tran
mission error W
-+n1tsaltze system
l - The types of command data sent from the image forming apparatus to the host system are as follows.

MEANING
Comouth E-OPERANDcomman
d/date received A
5tatus 1nfarsation send c
command again N
-protocol error
X 5 status information
lcl (2) Image data The format of the image data is as follows.

<FLAG><CLASS><N><DH><yllo
w image data (111 words)
＞<rJT> DHxsagenta image
data (111 words) x DT><DHxct
an image data (111wor
ds) xDT〉DHxblack image
data (111wards) x DT><FC5>
<FLAG> (N=452) The meanings of the symbols are as follows.

^j-J+ 1mmmm9 Communication protocol (1) Status The host system must send a status request command and check the status of the CGH before sending command data and image data to the CGH.However, command data such as status requests must be sent. (°in', 'N', 'W
') is not required when sending.

The status word consists of 18 bits and has primary meaning.

(Left below) Which bits of the status are checked differs for each command. Shown below are the states of each bit of the status word when command execution and image data input are possible.

jlilly (3) In the case of image data The protocol from receiving the print start command to receiving the image data is as follows.

(Left below) Error in communication If the process below has been executed to the end during communication between the host system and the image forming device, the host system determines that there is an error in the hardware of the communication system. 1. Treatment must be taken for recovery.

(Left below) 9 When the data transmission speed cannot keep up with the printing speed Image data sent from the host system is temporarily stored in a buffer inside the machine before being printed. When the data transmission rate from the host system cannot keep up with the printing speed and this buffer becomes empty, printing is interrupted. Printing resumes once the buffer is filled with image data. However, if the buffer is not filled with image data after three minutes, the head is capped. In this case as well, printing will resume once the buffer is filled with image data.

Next, types of errors that occur in this image forming apparatus and their countermeasures will be described.

(Margin below) Finally, maintenance of this image forming apparatus will be described.

9 Switches in the card rack A switch used for maintenance is provided on a board in the card rack. The arrangement is as shown in FIG.

9 Check Print (1) Purpose of Use There are four types of test patterns that can be printed using the check print function. One of four patterns can be selected using the test pattern selector switch inside the card rack. These patterns are used for the purpose shown in FIG.

(2) How to use Check that the device is in the following conditions.

No fist errors occurred 1゜ ・OFF I, IME mode.

・The BUSY lamp is not lit.

・The head is capped.

・The paper feed unit is closed.

4 by the test pattern changeover switch inside the card rack.
Select one of the types of patterns and turns.

CII on the display panel! Press the GK switch □.

is displayed on the display panel and the BUSYLED
lights up. Check printing starts after about 15 seconds.

After the check print is completed, the machine is in OFF LINE mode and can continue normal operation if no errors occur.

Cloud registration adjustment This is an adjustment that adjusts the ink ejection position of each color to eliminate printing misalignment between each color. This is done by changing the ejection position using the registration adjustment switch and checking the printing misalignment using a test pattern (number 0).

(1) Registration adjustment switch The horizontal registration adjustment switch adjusts the printing position in the direction perpendicular to the paper feeding direction (horizontal direction), and the printing position in the direction parallel to the paper feeding direction (vertical direction). There is a vertical register adjustment switch.

a. Horizontal cash register adjustment switch One of each color is provided.

When the indicated value of the switch is increased, the print position moves to the right (when the paper feeding direction is upward).

When the indicated value of the switch is decreased, the print position moves to the left (when the paper feeding direction is upward).

It can be adjusted in units of 1/8 layer in the range of 17/8 to +778 layers.

b. Vertical registration adjustment switch Each color head is divided into two levels, upper and lower.

Each color is provided with an adjustment switch for the upper head and for the lower head. The switch for the upper head does not affect the print position of the lower head (and vice versa).

There are two switches each for the upper head and the lower head, making up a set. One of the two is for coarse adjustment (
One is for fine adjustment (in 1/2 mm increments), and the other is for fine adjustment (
(adjustment in 1/32mm units).

When the indicated value of the switch is increased, the print position moves downward (when the paper feeding direction is upward).

When the indicated value of the switch is decreased, the print position moves upward (when the paper feeding direction is upward).

One axis l~+(3+ 31/32
) can be adjusted over a wider range.

The above relationship is illustrated in the 41st factor.

(2) Adjustment procedure 5) Set all horizontal registration adjustment switches to standard position (7).

5. Set all vertical registration adjustment switches to their standard positions (coarse: 8, fine: 11:0).

Five units Set the test pattern changeover switch to 0.

Each l'LtA Press the CHECK switch to perform check printing.

Zl knee 7'5 Look at the broken line pattern part of the test pattern obtained in step 4.

Measure how far the cyan, magenta, and yellow color lines deviate from the black line in either direction.

According to the result of step 5, operate the horizontal registration adjustment switch for each color: cyan, magenta, and yellow.

For example, if the cyan line is 2 dots (2/8 mg) to the left of the black line, turn the cyan registration adjustment switch to set it to 9.

5.11 Press the CHECK switch again to perform a check print. If the adjustment is insufficient, repeat steps 5 and 6.

If there is no longer a shift between the colors in the horizontal direction, proceed to step 8.

Look at the portion of the test pattern obtained in step 7 printed by the upper head.

The focus is on the bent portion of the polygonal line pattern section and the entire straight line pattern section.

Measure how far the cyan, magenta, and yellow color lines deviate from the black line in either direction.

According to the result of step 8, operate the vertical registration adjustment switch for the upper head for each color of cyan, magenta, and yellow.

Press the CI (ECK switch) to perform a check print. If the adjustment is insufficient, repeat steps 8 to 9. 2. If there is no vertical misalignment between each color in the area printed by the upper head, proceed to step Proceed to step 11.

ΔMashi-U Look at the part printed by the lower head of the straight line pattern part of the test pattern obtained in step 10.

Measure how much the printed area by the lower head of each of black, cyan, magenta, and yellow is shifted from the printed area by the upper head in either direction, up or down.

According to the result of step 11, operate the vertical registration adjustment switch for the lower head of each color of black, cyan, magenta, and yellow.

Press L92ヱ and CHECK switch to check print.
If the adjustment is insufficient, repeat steps 11 and 12.

I Vop adjustment The head voltage (Vo
p) is different for each recording unit (even if the color is the same, it varies depending on the unit).

Therefore, when replacing the recording head unit, it is necessary to adjust the Vop according to the following steps (see Figures 42 and 4).
(See Figure 3).

Insert the terminal of the specified digital tester into the VOP monitor terminal of the replaced recording head unit (left side (black) -
9 right side (red) +).

・While pressing the Vop monitor switch, adjust the volume to the voltage value written on the top of the recording head unit.

5. Modification of recording surface forming means The recording surface positioned with respect to the recording head unit is
It can also be formed as follows.

First, in the example described above, the fan 13B provided in the assembly 130 was operated to blow air from the assembly 130 side to the platen 382 side in order to back up the adsorption of the recording paper P to the platen 382. In a modified example, the fan 138 is operated in the opposite direction so as to attract the recording paper P to the front surface of the assembly 13G. In this case, on the front surface of the assembly 130, there are horizontal linear protrusions 1 arranged above and below the recording head.
The height of the No. 15 assembly 130 from the front is made higher than the height of the recording head. Further, the operation of the fan 330F for attracting the recording paper P to the platen 3132 is stopped.

By doing this, the recording paper P can be attracted to the front surface of the assembly 130 by the suction action of the fan 13B, and the distance between the surface of the recording paper P and the recording head can be maintained appropriately by the linear projections 115. Recording can be performed stably on the recording paper P. Furthermore, while the fan 138 continues to operate, the heater for heating the recording head is controlled to keep the temperature within the recording head assembly 130 constant based on the detection result of a temperature sensor provided within the recording head assembly 130.

[Effect 1] As explained above, according to the present invention, when the pinch roller is released from the conveyance roller for conveying the recording medium during conveyance and the recording medium is mounted, the conveyance of the recording medium is caused by the opening operation. Since the guide member guides both sides of the leading end of the recording medium at the start, it is possible to provide an image forming apparatus that is easy to operate when loading the recording medium.

[Brief explanation of drawings]

FIG. 1 and FIGS. 2(A) and 2(B) are perspective views showing an example of a schematic configuration of an image forming apparatus of the present invention. FIG. 3 is a perspective view showing an example of the internal configuration of the recording system unit 100 with the paper feeding unit opened. FIG. 4 is a perspective view showing the paper feeding unit opened to explain the internal structure of the paper feeding unit, and FIGS. 5(A) to (C)
6 is an explanatory diagram for explaining an example of the internal configuration of the controller unit, and FIGS. 6(A) to 6(C) are diagrams illustrating an example of a mounting operation when fanfold paper is used as a recording medium. FIG. 7 is a top view showing an example of the configuration of a display panel. The tpIB diagram is a diagram for explaining the display contents of a 7-segment display. Figure 9 is a diagram showing an example of switches and indicators arranged inside the device, Figures 10 (A) to (C) are diagrams showing an example of the drain tank replacement procedure, and Figure 11 is a paper feeding unit. FIG. 12 is a diagram showing an example of a detailed configuration of a paper deck section. FIG. 13 is a diagram showing an example of the configuration of the lower paper feeding mechanism and the lower roller opening/closing mechanism. FIG. 14 is a diagram showing an example of the configuration of the main parts of the recording surface forming section including the platen. FIG. 15 is a diagram of the motor unit. The figure which shows one example of a structure. Fig. 16 shows an example of the structure of the upper feed roller and its transmission mechanism, Fig. 17 shows an example of the structure around the upper pinch roller, and Fig. 18 shows an example of the structure around the paper feed unit cover. Figures 19(A) and 19(B) are diagrams showing an example of the configuration of the flap opening/closing control mechanism, and Figures 20(A), CB) and (C) are respectively shown with the outlet closed and the flap closed. Figure 21 is a perspective view of the paper feeding unit seen from below to explain how to install the stacker; 23 and 24 are views showing locking mechanisms provided above and below the paper feeding unit, respectively. FIG. FIG. 25 and FIG. 28 are diagrams each showing an example of the configuration of a handle lever and its transmission part, and FIG. 27 is a diagram showing an example of the configuration of a controller unit. FIGS. 28 and 29 are views showing the closed and open states of the cap relative to the cap cover, and FIGS. 30 and 31 are perspective views showing an example of the structure of the cap cover, respectively. FIG. 32 is a diagram showing an example of the configuration of a recording head assembly. FIG. 33 is a diagram showing an exploded state of the support structure for the recording head assembly in the recording system unit, and FIG. 34 is a diagram showing an example of a coupled state of a fixed base and a movable base. FIG. 35 is a block diagram showing an example of the electrical configuration of the entire image forming apparatus to which the present invention is applied. FIGS. 36, 37, and 38 are flowcharts showing examples of operations according to the present invention. Figure 39 is a diagram showing the arrangement of switches, and Figure @40 is a diagram showing an example of a test pattern. FIG. 41 is a diagram showing a registration adjustment mode, FIG. 42 is a diagram showing a structure near a monitor terminal, and FIG. 43 is a diagram showing an example of a head voltage adjustment mechanism. 100...Recording unit. 200...Controller unit, 300...Paper feeding unit (conveying system unit) 4.40
G...Flap, 500...Display panel, 600...Peep window, TOO...Stacker, 800...Drain tank. 900...Pocket, 1000...First optical fiber connector. 1100...Second optical fiber connector, 1200...
・Power input connector, 1300...Power output connector, 140G...Handle lever. 1500...Power switch. 1108.1100.110)! , ll0Y... Recording head unit. 120B, 1200.120%, 120Y... Cartridge tank, 130... Recording head assembly. 140... Cap, 150... Cap cover, 310... Paper deck portion, 320... Lower feed roller, 330... Lower pinch roller, 340... Lower roller opening/closing mechanism, 350... - Upper feed roller, 380... Upper pinch roller, 370... Upper roller opening/closing mechanism, 380... Paper guide, 390... Recording surface forming unit, 210... Power supply device, 2208.220G, 22ON , 220Y ---VO
P%-: Ta terminal. 230...Vap mil monitor switch 40...Card rack, 250...Overload lamp. Cleaning of drawings (no changes to the existing contents) Fig. 1 Fig. 3 Fig. 4 Fig. 5 (A) Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 1O (A) Fig. 79 (A) ( 13) Figure 20 (A) Figure 20 (11) Figure 20 Figure 21 Figure 23/432A Figure 38 Figure 39 Figure 42 Figure 43 Procedural amendment (method) % formula % 2 , Name of the invention Image forming device 3, Relationship with the person making the amendment Patent applicant (100) Canon Co., Ltd. 4, Agent Address: 6 Seiko Building 3rd floor, 5-1-31 Akasaka, Minato-ku, Tokyo 107 Japan Talk (03)589-1201 (Representative) (7
748) Patent attorney Yoshi Tani - 5, Date of amendment order Voluntary 6, Written amendment to the procedure subject to amendment July 18, 1980 Director of the Patent Office Michibu Uga 1, Case indication patent application No. 115121 of 1980 2. Name of the invention Image forming device 3. Relationship with the person making the amendment Patent applicant (100) Canon Co., Ltd. 4, Agent 3rd floor, Seiko Building 6, 5-1-31 Akasaka, Minato-ku, Tokyo 107 Japan 6. Column 7 of “4. Brief explanation of drawings” of the specification subject to amendment, “Figures 6 (A) to (C)” on page 88, line 11 of the specification of contents of amendment
6 (A) to (D)”. Procedural amendment August 30, 1985

Claims (1)

[Claims] The recording medium is provided with a conveyance means having guide members on both sides of the recording medium so that the recording medium is positioned on the conveyance path when a pinch roller that presses the recording medium against the conveyance roller is released on the upstream side of the recording position. An image forming apparatus characterized by: