JPH0415649A - Image recorder - Google Patents

Abstract

PURPOSE:To prevent the slip of a driving roller and the looseness of a photosensitive recording medium from occurring by rotating the driving roller at a circumferential speed which is higher than a pressurizing roller with the aid of a motor, detecting that the main body of the motor is turned as much as a prescribed angle with the aid of a sensor when it happens and giving a control signal which lowers the speed of the revolution to the motor side. CONSTITUTION:Since the circumferential speed of the driving roller 65a is set slightly higher than that of the pressurizing roller 55, the looseness does not occur on the photosensitive recording medium 12 between them. When the motor main body 67 is rotated by the prescribed angle, the control signal is given to the motor 66 by the sensor 76 and the speed of the revolution of a motor shaft 68 with respect to the motor main body 67 is lowered to a pre scribed value. The speed of the revolution is magnitude such an extent that the looseness is not made to occur on the medium 12 between the driving roller 65a and the pressurizing roller 55. Thus, the slip of the driving roller 65a with respect to the medium 12 is prevented from occurring. Besides, the looseness of the medium 12 between the roller 65a and the roller 55 is prevented from occurring.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image recording apparatus that conveys a photosensitive recording medium on which a latent image is formed, superimposes a color developer sheet on the medium, and develops the medium by applying pressure. .

[Conventional technology]

As shown in FIG. 3, a conventional image recording apparatus includes a cartridge 2 for carrying the photosensitive recording medium 1, from which the photosensitive recording medium 1 is drawn out by rotation of a drive roller 3. Also, from the cartridge 2 to the drive roller 3
An exposure table 4, an exposure lamp 5, and a pressure roller 6 are arranged in this order on the travel path of the photosensitive recording medium l. In addition,
The photosensitive recording medium 1 leaving the driving roller 3 is wound up by a winding roller 7.

The drive roller 3 is rotated by a motor (not shown) and stops after pulling out a predetermined length of the photosensitive recording medium 1 from the cartridge 2.

On the exposure table 4, the photosensitive recording medium 1 pulled out in this way
A mask original plate 8 having a light-shielding image is superimposed on the mask original plate 8 and exposed with an exposure lamp 5 to form a latent image.

Next, the drive roller 3 rotates to bring the latent image forming portion of the photosensitive recording medium 1 to the pressure roller 6.

At the pressure roller 6, the color developer sheet 9 is superimposed on the latent image forming area and pressurized to perform development processing.

When the latent image forming portion of the photosensitive recording medium 1 and the color developer sheet 9 are superimposed, the color developer sheet 9 is fed while monitoring the feed amount of the photosensitive recording medium 1 by the rotation speed of the drive motor, and the latent image is The formed portion and the color developer sheet 9 are registered.

Note that the developed color developer sheet 9 is discharged to a tray (not shown).

[Problem to be solved by the invention]

However, in the conventional image recording apparatus described above, when pressure developing the color developer sheet 9 with the pressure roller 6, the feeding speed of the pressure roller 6 may not match the feeding speed of the drive roller 3, and in such cases, gives rise to the following problems.

In other words, when the feeding speed of the pressure roller 6 becomes slower than that of the driving roller 3, the driving roller 3 scrapes or stubs, making it impossible to accurately detect the amount of feeding of the photosensitive recording medium 1, and the area of the latent image and This results in the inconvenience of pressure developing different areas. If the motor of the drive roller 3 is a stepping motor, there is also the problem of step-out.

Also, when the feeding speed of the pressure roller 6 becomes faster, the photosensitive recording medium 1 is moved between the pressure roller 6 and the drive roller 3.
This causes a problem in that the material becomes loose, which hinders the subsequent feeding of the photosensitive recording medium 1.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a drive roller that conveys a photosensitive recording medium on which a latent image is formed, and a drive roller that conveys a photosensitive recording medium on which a latent image is formed. In an image recording apparatus equipped with a pressure roller at a predetermined location for overlapping color developer sheets and performing pressure development, the drive roller includes a motor that rotates the drive roller at a peripheral speed higher than that of the pressure roller. The main body of the motor is rotatably supported by the frame of the image recording device via a support member with respect to the shaft, and an elastic member that generates a drag force in a direction opposite to the rotation transmission direction of the shaft. A sensor is connected to the frame via a sensor, and a sensor is provided at a predetermined location to issue a control signal to reduce the rotational speed of the shaft to a predetermined value when the main body of the motor rotates by a predetermined angle against the elastic member. The system adopts a new configuration.

[Effect]

The motor rotates the drive roller at a higher circumferential speed than the pressure roller.

Therefore, the photosensitive recording medium is conveyed in one direction while being pulled between both rollers.

During the conveyance, when the tension of the photosensitive recording medium between both rollers increases, the main body of the motor rotates about its axis against the elastic member.

When the main body of the motor rotates by a predetermined angle, a sensor detects this and issues a control signal to the motor to reduce the rotation speed.

As a result, the circumferential speed of the drive roller decreases, reducing the tension on the photosensitive recording medium between both rollers. On the other hand, the main body of the motor returns to its original position due to the restoring force of the elastic member.

By repeating the above operations, the photosensitive recording medium is conveyed in one direction while being alternately pulled with a certain tension and a smaller tension.

Therefore, it is possible to accurately detect the feeding amount of the photosensitive recording medium by preventing the driving roller from slipping and from loosening the photosensitive recording medium between the driving roller and the pressure roller, and to appropriately pressure develop only the latent image area. I can do it.

Furthermore, if the motor of the drive roller is a stepping motor, there will be no tax adjustment.

〔Example〕

Embodiments of the image recording apparatus according to the present invention will be described below with reference to FIGS. 1 and 2.

The image recording device includes a monochrome laser printer 1 for producing a mask original 10, and a color image recording section 20 that supports it, each of which is surrounded by cases 21 and 22.

The color image recording unit 20 also includes an automatic document feeder 1 for feeding the mask original 10 toward the photosensitive recording medium 12.
3. A positioning device 14 for overlapping the mask master 10 on the photosensitive recording medium 12; an exposure device 15 for exposing the mask master 10 from above and printing the image of the mask master 10 onto the photosensitive recording medium 12; a latent image formed by the exposure device 15; a developing device 17 that superimposes the photosensitive recording medium 12 on which color is formed on a developer sheet 16 and performs pressure development; a photosensitive recording medium supplying device that brings the photosensitive recording medium 12 to the developing device 17 via the exposure device 15; 18, a heat fixing device 19 for fixing the developed color developer sheet 16, etc. are provided.

Next, the configuration of each of the above devices will be explained in order.

Monochrome Laser Printer The monochrome laser printer 11 is provided at the top of the image recording apparatus, and a paper feed cassette 23 is provided at one end of a case 21, and a discharge port 24 is provided at the other end.

Inside the case 21, a drum-shaped photoreceptor 25, a polygon scanner 26, and a developing device 27 are provided, and the polygon scanner 26 irradiates laser light onto the charged surface of the photoreceptor 25 to draw an electrostatic latent image. The image is then developed by a developing device 27. Normally, the monochrome laser printer 11 records data transmitted from a host computer, and an image based on such data is drawn on the photoreceptor 25 as a latent image.

Further, a roller 28 for passing the paper in the paper feed cassette 23, a fixing device 29 for fixing the image on the paper, etc. are arranged from the paper feed cassette 23 to the discharge port 24 via the developing device 27. has been done.

Note that a paper path switching section 3 is provided in front of the discharge port 24.
0 is provided, and a monochrome paper output tray 3 is provided on one path side, which is switched by the paper path switching unit 30.
1 is provided, and an automatic document feeder 13 is provided on the other path side.
A tray 32 is provided.

As a result, the toner image is transferred onto the plain paper or OHP sheet fed from the paper feed cassette 23 and fixed by the fixing device 29 . Then, the paper path switching unit 30
If a strong black and white image is required, the paper is sent to the monochrome output tray 31, and if a color image is required, it is sent to the mask original plate 10.
The document is then fed to the automatic document feeder.

Automatic document feeder An automatic document feeder (hereinafter referred to as ADF) 13 receives the mask original 10 ejected from the laser printer 11.
It has a tray 32 for receiving the mask original plate 10, and a roller 87 for taking the mask original plate 10 from the tray 32 into the color image recording section 20.

The ADF 13 transfers the three sheets of monochrome print paper sent to the tray 32 into a set of mask original plates 10 (IOR,
The image data are sequentially sent to the alignment device 14 at the bottom of the color image recording section 20 for use as LOG, 10B), and are discharged to a predetermined position after exposure.

That is, a mask original transport path 33 is provided from the ADF tray 32 to the right end of the color image recording section 20 via the alignment device 14.

Along the conveyance path 33, there are roller pairs 34, 35, 36 whose rotation direction can be controlled, and a gate 37° roller pair 38.
, gate 39, and roller pairs 40, 41 are arranged.

The used mask original plate 1 is placed on the outside of the roller pair 40 and 41.
0 (IOR, LOG.

A mask original discharge tray 44 for discharging the mask originals 10B) is arranged.

Note that the mask original plate 10 (I
A pair of glue curler rollers 42 is arranged to remove curls from the paper (OR, LOG, 10B). Further, a mask original storage section 43 is arranged adjacent to this transport path 33 portion.

Alignment Device The alignment device 14 includes a glass plate 45 installed at a horizontal location on the conveyance path 33 of the mask original 1-0, and a pair of rollers 46.4 near both left and right ends of the glass plate 45.
7, and is further provided with a sensor (not shown) at a predetermined location for positioning the mask original 10.

Above the glass plate 45, a band-shaped photosensitive recording medium 12 on which the mask original 10 is to be superimposed is arranged parallel to the glass plate 45.

The photosensitive recording medium 12 is, for example, disclosed in Japanese Patent Application Laid-Open No. 62-14304.
The main material is a photocurable resin using a photopolymerization initiator known in Publication No. 4, and includes a photocurable resin that cures with light of each wavelength of red, green, and blue, and cyan, magenta, Microcapsules containing yellow dye precursors are coated on a base sheet.

The photosensitive recording medium 12 is provided by a photosensitive recording medium supplying device 1, which will be described later.
8, the three mask original plates 10R910G, IOB
Each time the paper is printed, it is sent a predetermined length in one direction.

Exposure device The exposure device 15 includes an exposure table 48 arranged above the glass plate 45 .

The exposure table 48 is lowered by a cam 49 to bring the mask original 10 conveyed onto the glass plate 45 and the photosensitive recording medium 12 into close contact with each other.

Further, the exposure device ff115 is equipped with a fixed roller 50 on the entrance side of the mask original plate]0.

The fixed roller 50 presses the photosensitive recording medium 12 against the left end of the exposure table 48 that has been lowered to a predetermined position by the cam 49, and fixes the photosensitive recording medium 12 to the exposure table 48 during exposure of the mask original 10. It has become.

Further, the exposure device 5 includes an exposure head 51 that can reciprocate in the left-right direction below the alignment device 14.

The exposure head 51 includes a linear white light source (hereinafter referred to as a lamp) 52 and a reflecting plate 5 that reflects light from the lamp 52.
3 and filter unit 54 (54R, 54G, 54B
)have. The filter unit 54 includes a red filter 54R, a green filter 54G, and a blue filter 54B, and is operated by a drive source (not shown) to selectively move each filter 54 above the lamp 52. There is.

Developing device The developing device 19 includes a pair of pressure rollers 55 that superposes the color developer sheet 16 on the photosensitive recording medium 12 on which the image of the mask original plate 10 has been formed as a latent image by exposure by the exposure device 15 and develops it under pressure. We are prepared. One of the pressure rollers 55 is driven by a motor 56, as shown in FIG.

Note that a gear (not shown) is interposed between the shaft of the pressure roller 55 and the shaft of the motor 56.

The color developer sheet 16 is, for example, disclosed in Japanese Patent Application Laid-Open No. 58-88739.
It is constructed by applying the color developer disclosed in the above publication onto a base paper.

The developer sheet 16 is set in a cassette 57 provided on the right side of the color image recording section 20 so that the developer-coated surface thereof faces downward.

A suction cup 58 is swingably set on the upper part of the cassette 57, and the developer sheets 16 are taken out one by one from the cassette 57 by this suction cup 58 and supplied to the pressure roller 55. ing.

Photosensitive recording medium supply device Photosensitive recording medium supply device ii! Reference numeral 18 includes a feed roll 59 and a take-up roll 60 for the strip-shaped photosensitive recording medium 12 above the color image recording section 20 .

The feed roll 59 is housed in the cartridge 61 so as not to be exposed to light.

The photosensitive recording medium 12 is fed out from a feeding roll 59 in a cartridge 61, passes between a glass plate 45 and an exposure table 48, passes through a pressure roller 55, and then reaches a take-up roller 60. are various guide rollers 62, buffers 63, and color developer sheet separation rollers 6 arranged along the traveling path of the photosensitive recording medium 12.
4. It is equipped with a drive roller 65a.

The drive roller 65a is equipped with a drive motor 66, as shown in Figure 1.

The motor 66 is, for example, a stepping motor, and the drive roller 65a and the driven roller 65b intermittently transport the photosensitive recording medium 12 by driving the motor 66, and transfer the latent images one by one at a constant pitch to a pressure developing device. 17
The photosensitive recording medium 12 is stopped each time the leading edge of the latent image reaches the pressure roller 55 of the pressure developing device 17. The stop position is the drive roller 65a
It is calculated from the number of revolutions.

Further, the drive roller 65a is rotated by the motor 66i at a zero circumferential speed, which is higher than that of the pressure roller 55, and pulls the photosensitive recording medium 12 between the drive roller 65a and the pressure roller 55.

The main body 67 of the motor 66 is rotatably supported by the frame 74 of the image recording apparatus via a bearing 69, which is a supporting member, about a shaft 681 thereof. Further, it is connected to the frame 74 via a tension coil spring 70, which is an elastic member that generates a resistance force in the direction B opposite to the rotation direction of the shaft 68.

A stopper 71 is provided on the frame 74 and serves to prevent the main body 67 of the motor 66 from over-rotating by coming into contact with the locking piece 72 of the tension coil spring 70.

A protrusion 73 is provided on the main body 67 of the motor 66, and two sensors 75 and 76 are fixed to the frame 74 along the rotation locus of the protrusion 73 as the main body 67 of the motor rotates.

The sensors 75 and 76 are for detecting the rotation angle of the motor body 67 around the shaft 68 and issuing a control signal to the motor 66 to reduce the rotation speed of the shaft 68 to a predetermined value.

Note that a gear (not shown) is interposed between the drive roller 65a and the motor 66.

Thermal fixing device The thermal fixing device 19 is provided slightly above the developing device 17, and has an endless belt 77 for receiving and taking the developed color developer sheet 16 coming out of the developing device 17.

The endless belt 77 is stretched between a roller 78 adjacent to the separation roller 64 and a roller 80 adjacent to the entrance of the output tray 79 on the right side of the color image recording section 20.

Further, the endless belt 77 i: it is contacted with the rubber rollers 81, 82, 83, which work together with the endless belt 77 to draw in the developer sheet 16 and then send it out to the discharge tray 79. It has become.

Further, a heater 84 and an impeller 85 are provided for heating the color developer sheet 16 that passes one layer above the endless belt 77. These are built into the +1 casing 86.

Next, from the image recording device 1 configured as above]
Group mask original version 1. The operation when obtaining a color image from OR, LOG, and IOB will be explained.

First, a mask original plate 10R for red is created by the monochrome laser printer 11.

This mask original plate 10R is a mask original plate in which the microcapsules containing a cyan dye precursor are cured in the microcapsules coated on the photosensitive recording medium 12, and a toner as a light-shielding image is placed on the other parts. It is.

The mask original 10R outputted from the monochrome laser printer 11 is sent to the ADF tray 32, and then fed into the color image recording section 20 by the ADF paper feed roller 87.

In the color image recording section 20, the mask original 10R passes through a mask original conveying path 33 and passes through a pair of rollers 34.
．． 36 into the alignment device 14. During the process, the curl of the mask original 10R is corrected by the curler roller 42.

At this time, the gate 37 is at the position indicated by the solid line.

Next, the alignment device 14 transports the mask original 10R to an appropriate exposure position by the roller pair 46, and then uses a drive source (not shown) to read the alignment mark printed on the mask original 10R with a sensor. move it into place.

On the other hand, by moving the buffer 63 in advance from the broken line position to the solid line position in the direction of arrow E, the photosensitive recording medium 12
is pulled out under the exposure table 48 by a predetermined length. At this time, the upstream side of the photosensitive recording medium 12 is braked by the driving roller 65a, the driven roller 65b, and the like. Incidentally, the portion of the photosensitive recording medium 12 where the color image has already been exposed, which precedes the portion to be exposed, is exposed to the pressure by moving the buffer 63 in the direction of arrow F with the operation of the pressure developing device 17. It will be sent to the developing device 17.

Immediately before alignment by the alignment device 14, the exposure table 48 is lowered to a predetermined position by the cam 49, and the fixed roller 50 is pressed against the left end of the exposure table 48, so that the exposed recording medium 12 that has been pulled out is moved to the exposure table 48. Fixed to.

After this positioning is completed, the exposure table 48 is further lowered by the cam 49, and the photosensitive recording medium 12 is brought into close contact with the mask original 10R on the glass plate 45 of the positioning device 14.

When the exposure table 48 comes into close contact with the alignment device 14, the lamp 52 of the exposure device 5 is turned on, and the exposure device 15 moves in the direction indicated by the arrow. As a result, the red light from the red filter 54R passes through the mask original 10R to the photosensitive recording medium 1.
2 is scanned and exposed.

When the exposure is completed, the lamp 52 is turned off and the exposure device 15 is turned off.
moves backward in the direction of arrow B. At this time, the filter unit 54 of the exposure device 15 is operated by a drive source (not shown) to move the green filter 54G above the lamp 52.

Since the exposure table 48 is raised by the rotation of the cam 49 while the exposure device 15 moves backward, the photosensitive recording medium 12 is separated from the alignment device 14 and the mask original 10R.

Note that pack tension is applied to the roll 59 of the photosensitive recording medium 12 in the cartridge 61, so when the exposure table 48 is raised as described above, the photosensitive recording medium 1
The slack in 2 is rewound.

Even after the exposure of the red mask master plate 10R is completed, the exposure table 48 only rises to a predetermined position, and the photosensitive recording medium 12 is moved to the exposure table 48 by the fixed roller 50 pressed against the left end of the exposure table 48. remains fixed.

Next, the green mask original 10G created by the monochrome laser printer 11 is placed on the ADF tray 32, A
The mask original transport path 33 passes through the DF paper feed roller 87 and the recurler roller 42, and when it reaches just before the roller pair 34, the roller pair 34°36.46.47.38 transports the mask original 10R to the right. It is sent out from the alignment device 14.

At the same time, the mask original LOG is transported to the exposure position and stopped.

At this time, the gates 37 and 39 are at the positions indicated by the solid lines, and the exposed mask original 10R is held between the pair of rollers 41 when its rear end passes through the gates 39.

The mask original 10G guided to the alignment device 14 is
Mask original version 1. As in the case of OR, the photosensitive recording medium 12
I am brought into close contact with this. Then, by lighting the lamp 52, exposure to green light is performed.

This mask original plate 10G is a mask original plate in which toner, which is a light-shielding image, is placed on other parts of the microcapsules coated on the photosensitive recording medium 12 in order to harden the microcapsules containing a magenta dye precursor. be.

After the exposure is completed, the exposure table 48 is raised to a predetermined position. Furthermore, the exposure device 15 moves back to the original position and moves the filter unit 54 so that the blue filter 54B is positioned above the operating ramp 52.

Next, when the blue mask original 10B created by the monochrome laser printer 11 is conveyed just before the roller pair 34, the roller pair 34°36.46, 47.3
8 rotates to feed the mask original 10G from the alignment device] 4 to the right, and the mask original 10B is conveyed one exposure position and then stopped. At this time, the gate 37 (indicated by the solid line) and the gate 39 (indicated by the broken line) are located, and the exposed mask original 10G is held between the pair of rollers 40 after passing through the gate 39 at its rear end and stops.

The mask original 10B guided by the alignment device 14 is brought into close contact with the photosensitive recording medium 12 in the same manner as other mask originals. The photosensitive recording medium 12 is a mask original plate 10.
B is exposed to blue light.

This mask original plate 10B is a mask original plate in which toner, which is a light-shielding image, is placed on other parts of the microcapsules coated on the photosensitive recording medium 121 in order to harden the microcapsules containing a yellow dye precursor. be.

By the above operations, a latent image of a desired color image is recorded on the photosensitive recording medium 12.

Thereafter, the exposure table 48 rises to the initial position, and its left end part separates from the fixed roller 50.

At this time, as the preceding latent image develops, 1. z /<, the sofa 63 is at the position shown by the broken line, and moves in the direction of the arrow E to pull out the unexposed portion of the photosensitive recording medium 12 from within the cartridge 61 below the exposure table 48 .

Thereafter, the buffer 63 moves in the direction of arrow F and the drive roller 65a rotates to transfer the exposed portion of the photosensitive recording medium 12 to the pressure developing section 17. This pressure developing section 1
At step 7, the photosensitive recording medium 12 is subjected to development and coloring/glossy processing.

On the other hand, during this development, since the photosensitive recording medium 12 is held and fixed by the exposure table 48 and the fixed roller 50, the next color image is exposed at the exposure device 15.

In the pressure developing device 17, the color developer sheet 16 is sent out from the cassette 57 by a suction cup 58 in synchronization with the movement of the photosensitive recording medium 12, and the leading end of the developer sheet 16 touches the photosensitive recording medium 12.
is conveyed so as to correspond to the leading edge of the latent image.

The color developer sheet 16 is drawn into the pressure roller 55 and pressurized together with the photosensitive recording medium 12 traveling by the drive roller 65a. As a result, uncured microcapsules on the photosensitive recording medium 12 are destroyed by pressure, and a color image corresponding to one latent image on the photosensitive recording medium 12 is developed on the developer sheet 16.

During this pressure development, as mentioned above, the circumferential speed of the drive roller 65a is slightly higher than that of the pressure roller 55.
There is no slack in the photosensitive recording medium 12 between them.

As a result, the tension of the photosensitive recording medium 12 between the pressure roller 55 and the drive roller 65a gradually increases, and the rotation of the drive roller 65a decreases or stops. Therefore, the motor main body 67 starts to rotate in a direction B opposite to the rotational direction A of the shaft 68 against the tension coil spring 70.

When the motor body 67 rotates by a predetermined angle, the sensor 76 issues a control signal to the motor 66 to reduce the rotation speed of the motor shaft 68 relative to the motor body 67 to a predetermined value. This rotational speed is large enough to prevent the photosensitive recording medium 1-2 from becoming loose between the drive roller 65a and the pressure roller 55.

When the motor rotation speed decreases, the motor main body 67 rotates to its original position due to the restoring force of the tension coil spring 70, and stops against a stopper 71.

The sensor 75 detects that the rotational speed has returned to its original value.

Thereafter, the tension of the photosensitive recording medium 12 between the drive roller 65a and the pressure roller 55 increases again, and the above-described operation is performed again. By repeating this process, the tension of the photosensitive recording medium 12 between the drive roller 65a and the pressure roller 55 is kept almost constant, and the amount of feed of the photosensitive recording medium 12 is accurately recognized by the drive roller 65a.

Note that when the pressure roller 55 of the pressure developing device]7 rotates in the direction of the arrow, the buffer 63 moves in the direction of the arrow F.

The developer sheet 16 developed as described above is separated from the photosensitive recording medium 12 by the separation roller 64 and guided toward the heat fixing device 19 .

In the heat fixing device 19, the color developer sheet 16 is heated by a heater 84 and by air circulating in a casing 86 by an impeller 85, thereby promoting color development of a color image. At the same time, the binder polymer (binder resin) for fixing the color developing medium to the base paper of the color developer sheet 16 is thermally melted, and the surface becomes smooth.
The surface is obtained with a moderate gloss. The color developer sheet 16 that has been subjected to color development and gloss treatment is discharged to a paper discharge tray 79.

Note that the same image is output as follows.

First, the mask original 10B at the exposure position is sent to the left, and the mask original 10R held at the position of the roller pair 41 is sent to the alignment device 14. Mask original 1
0B is held between the pair of rollers 34 at a position where its rear end passes through the gate 37.

Mask original plate 10R sent to positioning device 24
After alignment, it is brought into close contact with the photosensitive recording medium 12 and exposed to red light.

Next, the mask original 10R is sent out to the left, and the mask original 10G held at the position of the roller pair 40 is sent into the alignment device 14.

The mask original 10R is held between the pair of rollers 35 at a position where its rear end passes through the gate 37.

The mask original LOG sent to the alignment device 14 is aligned, brought into close contact with the photosensitive recording medium 12, and exposed to green light.

Next, the mask original 10G is sent to the right, and the mask original 10B held at the position of the roller pair 34 is sent to the positioning device 14, and is exposed in close contact with the photosensitive recording medium 12.

As a result, a latent image of the same color image as previously formed is formed on the photosensitive recording medium 12, and a color image is formed on the developer sheet 16.

Thereafter, by repeating the same operation, a predetermined number of color images can be output from one set of mask originals 10.

After obtaining the required number of color images from the same mask original plate 10, each mask original plate ]-0 is discharged from the roller pair 41 or the roller pair 40 to the paper discharge tray 44.

In addition, if the next mask original 10 or monochrome laser printer 11 outputs while a series of color images are being exposed, it should be stored in the ADF tray 32 until the exposure of the previous set is completed. Then, the ADF paper feed roller 87 feeds the paper sheets one by one into the color image recording apparatus 20.

Further, when reusing a mask original output from another monochrome laser printer or a previously used mask original, the mask original can be input by setting it on the ADF tray 32.

〔Effect of the invention〕

Since the present invention has the above configuration, it is possible to prevent the drive roller from slipping against the photosensitive recording medium, and also to prevent the photosensitive recording medium from loosening between the drive roller and the pressure roller.

Therefore, it is possible to always accurately feed the photosensitive recording medium to the pressure developing device, thereby optimizing the development on the developer sheet.

Further, when the driving motor is a stepping motor, it is possible to prevent step-out of the stepping motor.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a partially cutaway perspective view showing the peripheral part of the drive roller together with the peripheral part of the pressure roller, and FIG. 2 shows the entire image recording device. A schematic vertical sectional view, FIG. 3 is a partially cutaway vertical sectional view of a conventional example. DESCRIPTION OF SYMBOLS 10... Mask original plate, 11... Monochrome laser printer, 12... Photosensitive recording medium, 16... Color developer sheet, 55... Pressure roller, 56... Motor, 65
a... Drive roller, 66... Motor, 67... Motor body, 68... Motor shaft, 69... Bearing, 70... Tension coil spring, 71... Stopper, 73... Projection, 74...Frame, 75.76
...Sensor. Applicant's representative: Yasushi Ishikawa

Claims (1)

[Claims] A drive roller that conveys a photosensitive recording medium on which a latent image has been formed, and a color developer sheet placed on the photosensitive recording medium that is installed downstream of the photosensitive recording medium that is conveyed by the drive roller and developed under pressure. In the image recording apparatus, the driving roller is equipped with a motor that rotates the driving roller at a circumferential speed higher than that of the pressing roller, and the main body of the motor is connected to its axis. is rotatably supported by the frame of the image recording device via a support member, and is connected to the frame via an elastic member that generates a drag force in a direction opposite to the rotation transmission direction of the shaft; The image recording device is characterized in that a sensor is provided at a predetermined location to issue a control signal that reduces the rotational speed of the shaft to a predetermined value when the main body of the motor rotates by a predetermined angle against the elastic member.