JP3428270B2 - Printing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer used in a device having a printing function such as a facsimile machine.

[0002]

2. Description of the Related Art In a printing apparatus such as a facsimile machine, the curl of a recording paper is removed by a recording paper curl removing device in order to maintain the appearance of recording paper such as thermal paper and prevent paper jams. ing.

A conventional printer will be described below with reference to the drawings. FIG. 13 is a schematic configuration diagram of a conventional printing device. In FIG. 13, 1 is a print head for printing on the recording paper 3, 2 is a platen roller for pressing the recording paper 3 between the print head 1, 4 is a roll-shaped recording paper supply unit, and 6 is a roll-shaped recording paper supply unit. The curl removing rod provided between the platen roller 4 and the platen roller 2, 8 is a cutter for cutting the recording paper into a predetermined size, 20 is a conveyance control unit, 21 is controlled by the conveyance control unit 20, and the cutter 8 is used for recording paper 3 This is a transport unit that reciprocates the unprinted recording paper 3 by a predetermined amount after cutting the sheet.

The recording paper curl removing operation of the printing apparatus configured as described above will be described. When the print head 1 is printing on the recording paper 3, the curl removing rod 6
The recording sheet 3 is wound around the recording sheet 3 and the recording sheet 3 is conveyed by the conveying section 21 while the curl of the recording sheet 3 is corrected by the pressure contact during the conveyance by the conveying section 21.

Next, when the printing of the recording paper 3 for one page is completed, the recording paper 3 for one page is cut into a predetermined size by the cutter 8, and then the transport unit 21 is controlled by the transport control unit 20. , The unprinted recording paper 3 is reciprocated by a predetermined amount, and the recording paper 3 is retracted toward the roll-shaped recording paper supply unit 4. Then, the tension of the recording paper 3 disappears, and the curl removing rod 6 disappears in a state of being in pressure contact, so that the crease of the recording paper 3 can be prevented to some extent.

[0006]

However, in the above-mentioned conventional configuration, there is a problem in that the recording paper, which is slack when not printed for a long time, remains bent, and the edge of the recording paper is bent. there were. When the curl has such a curl, when printed and sent out, the curl may not be normally stacked on the stacker (not shown).

The present invention solves the above-mentioned problems of the prior art by eliminating the curl at the time of ordinary recording paper conveyance, and
An object of the present invention is to provide a printing apparatus that does not leave a curl tendency on a recording sheet even when the recording sheet is conveyed after being stopped for a long time.

[0008]

In order to achieve this object, the present invention is to stop the printing operation in a printing apparatus provided with a curl removing member for removing the curl of the recording paper by bending the recording paper. In this case, after the recording paper is cut by driving the cutter, the conveying roller is forwardly rotated by a predetermined amount in the feeding direction to feed the recording paper to some extent to extend the slack of the recording paper. .

According to the present invention, it is possible to obtain a printing apparatus in which the curl during the normal conveyance of the recording paper is removed and the curl is not left on the recording paper even when the recording paper is conveyed after being stopped for a long time.

[0010]

[0011]

The invention according to claim 1 of the present invention is a roll.
-Shaped recording paper storage section for storing recording paper and transporting recording paper
The transport roller, print head, and recording paper
Winding the recording paper by bending it
A card that removes the habit and can be retracted to a position that does not bend the recording paper.
Located on the paper exit side of the roll removal member and the transport roller
And a cutter that cuts the recording paper with a blade that can be opened and closed,
Drives the conveyance drive unit that rotates the conveyance roller and the cutter.
A motor that is also used as a driving means, a cutter, and a motor.
Means for connecting or disconnecting the power transmission path between the
Is located between the print head and the cutter, and
Paper sensor to detect the
First, reverse the feed roller in the return direction and
The edge of the recording paper comes to the position of the print head based on the detection signal.
Stop the reverse rotation of the transport roller and power the switching means
Printing is performed by setting the transmission state and starting the forward rotation of the transport roller.
When printing the next page with the first control means
Rotate the motor to cut the chart paper, and then write immediately.
The recording paper is returned and the recording paper edge is detected based on the detection signal from the paper sensor.
Stops the reverse rotation of the transport roller when the unit reaches the position of the print head.
Stop so that the edge of the recording paper is at the printhead position.
Second control means and the mode to stop the printing operation.
After cutting the chart paper by rotating the cutter, the blade of the cutter opens.
After that, rotate the transport roller forward by a specified amount in the feed direction.
Send some recording paper and switch the switching means to the non-power transmission state.
4th, which cuts off the power transmission path between the cutter and the motor
With this configuration, when the paper jam is detected, by switching the switching means to the non-power transmission state, the blade of the cutter can be easily opened. Can be easily opened.

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a facsimile apparatus equipped with a printer according to an embodiment of the present invention, and FIG. 2 is a schematic block diagram of the printer according to the embodiment.

In FIGS. 1 and 2, 1 is a print head, 2 is a platen roller, 3 is recording paper used by pulling from a roll, and 3a is a roll in which the recording paper 3 is wound into a roll. It is the body.

Reference numeral 5 is an arm for driving the curl removing rod, 5a is a fulcrum of the arm 5, and 5b is a passive point of the arm 5. 6 is a curl removing rod. As shown in FIG. 3, the arm 5 holding the curl removing rod 6 has a fulcrum 5a.
Performs a swinging motion with a certain range centered at, and when printing on the recording paper 3, it descends downward as shown by the solid line,
The decurling rod 6 is lowered. When the printing operation is stopped, the arm 5 rises upward, that is, rises to the right as shown by the broken line, and the curl removing rod 6 is raised.

Reference numeral 7 is a positionally fixed introduction guide. 8 is a cutter, 8a is the upper blade of the cutter, 8b
Is the lower blade of the cutter 8. Reference numeral 8c is a holding plate that holds the upper blade 8a at both ends, and 8d is a fulcrum of the holding plate 8c. Lower blade 8
b is fixed. When the holding plate 8c rotates about the fulcrum 8d, the upper blade 8a moves downward and cuts the recording paper 3 sandwiched between the lower blade 8b and the upper blade 8a.

Reference numeral 9 is a positioning arm, and 9a is a fulcrum of the positioning arm 9. 10 is a crank gear, 11 is a switch, 12 is a pinion gear of the motor M2 and the crank gear 1
It is a one-way gear that is provided between 0 and. Reference numeral 13 is a stopper spring that prevents the crank gear 10 from rotating when the motor M2 rotates in the normal direction.

M1 is a motor serving as a power source for recording and conveying upon reception, and this motor M1 also has a function of a power source for driving the cutter. M2 is a motor that serves as a power source for sending the document at the time of transmission.
2 also has the function of switching the position of the positioning arm 9.

Reference numeral 14 is a spring for urging the arm 5 in the direction of arrow F. When the positioning arm 9 is lowered, the force of the spring 14 causes the arm 5 to rotate in the direction of arrow F and the curl removing rod 6 to rise. The motor M
2, the one-way gear 12, the crank gear 10, the positioning arm 9 and the like constitute a curl removing rod position control mechanism portion.

Reference numeral 15 is an arm for switching the power supply destination of the motor M1, and reference numeral 15a is a fulcrum of the arm 15. 1
6 is a switching gear (switching section), 17 is a one-way gear,
Reference numeral 18 is a crank gear, and 19 is a crank arm, which are for driving the upper blade 8a of the cutter 8. The tip of the crank arm 19 is rotatably connected to the holding plate 8c. Reference numeral 16a denotes a rotation center axis of the switching gear 16 provided on the arm 15.

Reference numeral 23 is a paper sensor provided between the cutter 8 and the platen roller 2. 24 and 25 are idler gears, and 26 is a platen gear.

Inside the platen gear 26, a delay mechanism is provided as shown in the sectional view of FIG. Reference numeral 27 is a roller shaft at both ends of the platen roller 2, and 27 a is a protrusion provided on the roller shaft 27. While the wall 26a provided on the platen gear 26 side does not hit the protrusion 27a, the power from the platen gear 26 is not transmitted and the platen roller 2
However, when the wall 26a hits the protrusion 27a, the power of the platen gear 26 is transmitted to the platen roller 2 and the platen roller 2 starts to rotate.

In FIG. 2, reference numeral 28 denotes a control unit for controlling each unit, which sends a signal to the print head 1 based on the signal from the paper sensor 23 and other information, and also operates the motor M1, the motor M2 and the like. .

Next, the mutual relationship, arrangement, function, etc. of each part will be described in detail. The print head 1, the arm 5, and the curl removing rod 6 are attached to the opening / closing lid side to facilitate the setting of the roll body 3a (recording paper 3) and the work of pulling out the recording paper 3 from the roll body 3a and setting it. .

The positioning arm 9 performs a swinging motion with a certain range around the fulcrum 9a as shown in FIG. 3, and the operation is transmitted to the arm 5 by the passive point 5b. The arm 5 is always in contact with the positioning arm 9 at the passive point 5b by the urging force of the spring 14. Since the protrusion 10 a of the crank gear 10 abuts on the base of the positioning arm 9, the positioning arm 9 is operated by the crank gear 10. The switch 11 detects the rotational position of the crank gear 10.

A one-way gear 12 having a double spur gear between the pinion gear of the motor M2 and the crank gear 10.
Is located and the motor M2 is used for fax transmission and copying.
Rotates in the forward direction to feed the document, and the crank gear 10 is rotated only when the motor M2 rotates in the reverse direction.

The swinging movement of the positioning arm 9 is transmitted to the arm 5, and this movement of the positioning arm 9 is used to move the curl removing rod 6. Further, the swinging movement of the positioning arm 9 is transmitted to the arm 15 via the point of action 9b and is also used for the movement of the switching gear 16.

A switching gear 16 is attached to one end of the arm 15, and the switching gear 16 constantly meshes with the pinion of the motor M1. The arm 15 is a motor M1
The oscillating motion is possible within a certain range around the fulcrum 15a, which is the tip of the output shaft, as shown in FIG. The switching gear 16 is rotatably held at the end of the arm 15,
Only when the arm 15 tilts to the right, the switching gear 16 meshes with the one-way gear 17, and the rotation of the motor M1 is transmitted to the one-way gear 17. The one-way gear 17 has a structure in which spur gears are doubled, and transmits the rotation to the crank gear 18 only when the motor M2 rotates in the opposite direction (FIG. 11: arrow E direction) when feeding the recording paper 3. Crank gear 1
The rotational movement of 8 is converted into the reciprocating movement of the crank arm 19, and transmitted to the upper blade 8a of the cutter 8 by the holding plate 8c,
The printed recording paper 3 is cut. A sensor 23 is arranged between the cutter 8 and the platen roller 2. After cutting the recording paper 3 by the cutter 8, the platen roller 2 is rotated in the reverse direction so that the cut tip portion passes a detection point of the sensor 23. To do.

The rotational power of the motor M1 is transmitted to the platen roller 2 via a pinion gear, an idler gear 24, an idler gear 25, and a platen gear 26 provided on the rotary shaft of the motor M1.

With the delay mechanism shown in FIG. 4, the cutter 8 is
The platen roller 2 does not reverse while the upper blade 8a moves to the stroke end in the closing direction to cut the recording paper 3, and the platen roller 2 starts to rotate when the upper blade 8a of the cutter 8 starts to open. . Then, the platen roller 2 is rotated in the reverse direction until the upper blade 8a stops at the stroke end in the opening direction, and the recording paper 3 is pulled back. The rotation of the motor M1 is stopped in accordance with a detection signal when the edge of the recording paper 3 passes the detection point of the sensor 23. The time (or rotation amount) from the generation of the detection signal to the actual stop is a counter or the like. The motor M1 is set to continue rotating until the end of the recording paper 3 reaches a predetermined print start position (position of the print head 1).

The stopper spring 13 is a motor M
It prevents the crank gear 10 from rotating when 2 rotates in the forward direction. When the motor M2 reverses, the crank gear 10
Rotates over the stopper spring 13 easily.

When the crank gear 10 rotates and the protrusion 10a comes to the right end shown by the solid line in FIG. 3, the curl removing rod 6 is printed on the recording paper 3 by the positioning arm 9 regulated by the protrusion 10a, that is, in FIG. Make sure to stop in the state indicated by the solid line. At the same time, the switching gear 16 held at the end of the arm 15 is brought into mesh with the one-way gear 17. When printing the recording paper 3, the switching gear 16 meshes with the one-way gear 17, but the upper blade 8 of the cutter 8
The a does not operate due to the double spur gear structure of the one-way gear 17 described above.

When the projection 10a comes to the left end shown by the broken line in FIG. 3, the curl removing rod 6 comes to the position shown by the broken line in FIG. 3, and the switching gear 16 does not mesh with the one-way gear 17.

The operation of the facsimile apparatus configured as described above will be described below. The facsimile apparatus operates by controlling each section by the control section 28.

First, the operation for starting the printing operation will be described. As shown in FIG. 5, the reverse rotation of the motor M1 (direction of arrow A) causes the reverse rotation of the platen roller 2 (direction of arrow B).
Then, the leading edge of the recording paper 3 is returned to the position of the print head 1. That is, after the leading edge of the recording paper 3 passes the detection point of the paper sensor 23 and the detection signal of the paper sensor 23 is output, the motor M1 is continuously rotated by a predetermined amount and stopped, and the state shown in FIG. 6 is obtained.

Next, the motor M2 is rotated in the normal direction, and the crank gear 10 is rotated only by a certain fixed angle. The positioning arm 9 causes the rotary motion to swing, and this swing motion is further transmitted to the arm 5, and the curl removing rod 6 held at the tip of the arm 5 moves downward from above, that is, as shown in FIG. It goes down to the right.

Since the recording paper 3 is pressed from the upper side to the lower side by the curl removing rod 6, the recording paper 3 is introduced into the guide 7.
However, since the radius of the introduction guide 7 is larger than the radius of the curl removing rod 6, the degree of bending is small, and thus the introduction guide 7 has a small effect of increasing the curl of the recording paper 3. . The introduction guide 7 has the effect of increasing the tension, and moreover, the curl removing rod 6 causes the recording paper 3 to be sharply bent (in a substantially U-shape) in the direction opposite to the curled direction. Curl is removed. After printing the recording paper 3 for a predetermined length, the cutter 8 cuts the recording paper 3.

Next, the recording paper cutting operation will be described in more detail. When cutting the recording paper 3, the arm 15 is moved to the position shown in FIG.
As shown in 1, the power is transmitted from the switching gear 16 to the one-way gear 17 at this time, and the motor M1 is transmitted via the pinion gear of the motor M1, the switching gear 16, the one-way gear 17, the crank gear 18, and the crank arm 19.
Is transmitted to the cutter 8. And the motor M1
When is rotated in the direction of arrow E, the crank arm 19 is lowered in the direction of arrow F, the holding plate 8c is rotated in the direction of arrow G,
The upper blade 8a of the cutter 8 moves downward to cut the recording paper 3 as shown in FIG.

After the recording paper 3 is cut, the platen roller 2 is reversed to move the leading end of the recording paper 3 backward, and the paper sensor 23 detects the leading end (cut side) of the recording paper 3 to cause the platen roller 2 to move. Stop reversing. At this time, if the printing operation continues, the recording paper 3 is returned until the leading end of the recording paper 3 comes to the position of the print head 1 as shown in FIG. After the leading edge of the recording paper 3 is returned in this manner, the platen roller 2 is normally rotated to print the next page. In addition,
When printing a plurality of pages continuously, such as when receiving a fax or copying a plurality of pages, the recording paper conveyance state is maintained without raising the curl removing rod 6 until the printing of the last page is completed.

Next, the operation for stopping the printing operation will be described in more detail. When the printing of the last page is finished and the printer is stopped, the recording paper 3 is cut by the cutter 8 as described above, and then the platen roller 2 is rotated in the reverse direction as described above to retract the leading end of the recording paper 3.
If the paper sensor 23 normally detects the leading edge of the recording paper 3, it is recognized that the recording paper 3 has been reliably cut.
Reverse. When the motor M2 is reversed, the protrusion 10a
Moves to the left end shown by the broken line in FIG. 3, the positioning arm 9 rotates as shown by the arrow H, and the curl removing rod 6 rises upward. That is, the state shown in FIG. 8 changes to the state shown in FIG. Next, the motor M1 is rotated by a predetermined amount, and the platen roller 2 is normally rotated in the paper feeding direction by a predetermined amount (direction of arrow C).

Although the recording paper 3 is slackened while the recording paper is still being conveyed by only raising the curl removing rod 6 upward, when the platen roller 2 is rotated in the forward direction to some extent, the recording paper 3 is rotated. The slack can be removed. As a result, the crease of the recording paper 3 due to the introduction guide 7 and the curl removing rod 6 is eliminated, and the curl due to slack is prevented. As shown in FIG. 10, the end 3a (cutting side) of the cut recording paper 3 projects outside the cutting position D of the cutter 8. At this time, the cutter 8 is in an open state (upper blade). 8a is raised), the edge 3a of the recording paper 3 goes out without being disturbed by the blade of the cutter 8. In addition, in the case of receiving a fax or copying a plurality of pages, after the printing of the last page is finished, the curl removing rod 6 is raised upward as described above, and the leading edge (cut side) of the recording paper 3 is cut.
Is projected to the outside of the cutting position of the cutter 8.

Next, the case where a paper jam is detected will be described in detail. If the leading edge of the recording paper 3 does not pass the position of the paper sensor 23 even if the recording paper 3 is retracted for a predetermined length by the reverse rotation of the platen roller 2 after the printing of a certain page is completed and the paper is cut, it is recognized as a paper jam. To be done.
When a paper jam is detected in this way, the motor M2
3 tilts the positioning arm 9 to the right as shown by the broken line in FIG. 3, this movement is transmitted to the arm 15, and the arm 15 tilts to the left, which causes the switching gear 16 to move away from the one-way gear 17 and the motor M1. The power transmission path to the cutter 8 is cut off. Therefore, at this time, the cutter 8 is in a free state, and the recording paper can be easily removed.

As described above, according to the present embodiment, the curl removing rod 6 removes the curl of the recording paper 3 when the recording paper is conveyed, and when the printing operation is stopped, the platen roller is moved by a predetermined amount in the feeding direction. By causing the recording paper 3 to rotate in the normal direction and feeding some of the recording paper 3, it is possible to prevent the curl habit due to the slack of the recording paper 3.

Further, according to the present embodiment, the connection and disconnection of the mesh between the switching gear 16 and the one-way gear 17 are controlled by the motor M2, so that the cutter can be freely moved when the paper jam of the recording paper 3 occurs. The recording sheet 3 can be put into the state and the work of removing the recording paper 3 is facilitated.

Further, since the switching gear 16 is connected to or disconnected from the one-way gear 17, which is the gear of the next stage, due to the inclination of the arm 15, the power transmission path between the cutter 8 and the cutter drive motor M1 is surely achieved. Can be cut off.

Further, the one-way gear 17 is a double spur gear, and is a motor M2 different from the cutter driving motor M1.
Since the rotation is transmitted to the crank gear 18 of the next stage only when the recording sheet is rotated in the opposite direction to the recording sheet feeding, the power transmission path between the cutter 8 and the cutter drive motor M1 should be more surely disconnected. You can

In this embodiment, the position of the curl removing rod 6 is controlled by rotating the motor M2 in the forward and reverse directions. The point is that the position of the curl removing rod 6 can be controlled. It is not limited. Further, the recording paper 3 may be thermal paper or the like, and the present embodiment can be similarly applied to these.

Further, in the present embodiment, the operation of the cutter 8 is the reverse rotation of the motor M1, and the operation of the switching gear 16 is the motor M2.
However, the same effect can be obtained by the other means. Further, although the present embodiment has described the curl removal of the thermal paper, the present invention is not limited to the thermal paper and can be similarly applied to other recording papers and has the same effect.

[0049]

According to the present invention, in a printing apparatus having a curl removing member for removing the curl of the recording paper, when the printing operation is stopped, the cutter is driven to cut the recording paper, and then the conveying roller is moved. It is equipped with a control unit that extends the slack of the recording paper by rotating the recording paper forward by a certain amount in the feed direction, and with this configuration, the curl of the recording paper is removed when the recording paper is conveyed, and printing is performed. When the operation is stopped, it is possible to prevent the curl habit due to the slack of the recording paper.

Further, since the switching section for controlling the connection / disconnection of the power transmission path between the cutter and the cutter driving motor is provided, the power between the cutter and the cutter driving motor is reversely moved when the recording sheet is reversely moved after cutting the recording sheet. Since the transmission path can be disconnected by the switching unit, the cutter can be freed when a paper jam of the recording paper occurs, and the recording paper removal operation becomes easy.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a facsimile device including a printing device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a printing apparatus according to the same embodiment.

FIG. 3 is an explanatory diagram for explaining a swinging motion of an arm that holds a curl removing rod of the printing apparatus according to the embodiment.

FIG. 4 is a cross-sectional view showing a delay mechanism provided in the printing apparatus according to the same embodiment.

FIG. 5 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 6 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 7 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 8 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 9 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 10 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 11 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 12 is an explanatory diagram for explaining a printing operation of the facsimile apparatus according to the embodiment.

FIG. 13 is a schematic configuration diagram showing a conventional printing device.

[Explanation of symbols]

1 print head 2 Platen roller 3 recording paper 5 arms 6 Curling rod 7 Introduction Guide 8 cutters 9 Positioning arm 10 crank gears 12 One-way gear 14 spring M1, M2 motor

Claims (4)

(57) [Claims] 1. A recording paper accommodating portion for accommodating a rolled recording paper, a conveying roller for conveying the recording paper, a print head, and a recording paper drawn by bending the recording paper accommodating portion. Curl removing member that removes the curl of the recording paper and that can be retracted to a position that does not bend the recording paper; a cutter that is located closer to the paper discharge port than the conveyance roller and cuts the recording paper with an openable / closable blade; A motor that also serves as a conveyance driving unit that rotates a roller and a driving unit that drives the cutter; a switching unit that connects or disconnects a power transmission path between the cutter and the motor; the print head and the cutter; The paper sensor for detecting the edge of the recording paper and the paper sensor which is arranged between the first and the second sides of the conveyance roller when the printing operation is started. Based reversal of the transport roller is stopped when the recording sheet end has come to a position of the print head, said switching means and to the power transmission state,
First control means for starting the forward rotation of the conveying roller to perform printing, and for continuously printing the next page, the motor is rotated to cut the recording paper, and then the recording paper is immediately returned. ,
Second control means for stopping the reverse rotation of the conveying roller so that the end of the recording paper comes to the position of the print head when the end of the recording paper comes to the position of the print head based on the detection signal of the paper sensor. When stopping the printing operation, the motor is rotated to cut the recording paper, and then the transport roller is normally rotated in the feeding direction to feed the recording paper to some extent to extend the slack of the recording paper,
A printing apparatus comprising: a third control means for switching the switching means to a non-power transmission state to disconnect a power transmission path between the cutter and the motor. 2. A method of returning the carrying roller during a printing operation.
Waiting for the detection signal of the paper sensor while reversing to the direction,
Even if the conveying roller is reversed by a predetermined amount or more, the paper
If the server does not give a signal that the edge of the recording paper has been detected,
-It is recognized as a paper jam and immediately
Non-power transmission of the switching means while stopping rotation
Power transmission between the cutter and the motor by switching to the state
4. A fourth control means for disconnecting the path.
Printer . 3. A curl removing member is attached to a free end of an rotatably supported arm, and in the operating state, the arm is rotated in a certain direction to remove the curl of the recording paper. 3. The printing apparatus according to claim 2, further comprising a curl removing member position control mechanism for displacing the recording paper to a position where the recording paper is not bent by rotating the arm in the opposite direction in a non-acting state. 4. An introduction guide having a diameter larger than the diameter of the curl removing member is fixed between the recording paper accommodating portion and the position of the curl removing member. First, it is bent by the introduction guide in the direction of increasing curl,
4. The printing apparatus according to claim 3, wherein the curl removing member sharply bends the recording paper in a direction opposite to the curled direction.