JPH03282532A - Image forming device - Google Patents

Abstract

PURPOSE:To accomplish rapid image forming in which the width of allowable temperature in using is made wider by causing a measuring means to measure the temperature of a photosensitive recording medium and a control means to control a spectral characteristic adjusting means so that the characteristic change of the photosensitive recording medium caused by the temperature may be corrected. CONSTITUTION:A CPU 71 reads a value outputted from an A/D converter 77 through a PIO 73 and stores it in a RAM 73. Next, the CPU 71 reads out the optimum insertion quantity of each color filter corresponding to the temperature by referring to a look-up table 72a stored in a ROM 72. Then, the CPU 71 reads the state of the color adjusting switch of the converter 77 through the PIO 73. In this color adjusting switch, the corrected state of a desired color is set by a user. Then, the CPU 71 corrects the insertion quantities of the respective filters 61-63, for example, L1-L3 based on the color corrected state shown by the color adjusting switch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus using a photosensitive recording medium whose coloring characteristics change depending on the temperature during exposure.

[Prior Art] A conventional technique using light-sensitive and pressure-sensitive paper is shown below.

This photosensitive and pressure sensitive paper is described in US Pat. No. 4,399,209 and carries numerous microcapsules on its surface. This microcapsule contains inside it a dye precursor that reacts with a color developer to develop color, and a photocurable resin that cures in response to light. There are three types of photocurable resins: one that cures in response to red light, one that cures in response to green light, and one that cures in response to blue light. ing. And red.

Each microcapsule contains a photocurable resin that is sensitive to green and blue, respectively.

Contains dye precursors that produce magenta and yellow colors.

The photosensitive pressure sensitive paper as described above is placed in a light-shielding cartridge and installed in an image forming apparatus.

Then, the reflected light from the document is imaged onto the photosensitive pressure-sensitive paper pulled out from the cartridge using a lens.

Then, the photosensitive pressure-sensitive paper that has been exposed in this way and the color developer paper whose surface is coated with the color developer are placed one on top of the other and pressurized. The uncured microcapsules are then destroyed, and the dye precursor inside adheres to the developing paper. The dye precursor then reacts with the color developer, causing the developer to develop a color. Therefore, an image corresponding to the original image is formed on the color developing paper.

In the above-mentioned apparatus, a configuration is also known in which a color filter can be inserted in the optical path from the original to the photosensitive pressure-sensitive paper. This device is capable of changing the color characteristics of the formed image with respect to the original color depending on the color filter.

Furthermore, as shown in Japanese Patent Application Laid-open No. 62-204277, a configuration is also known in which light that is uncorrelated with the original image is irradiated onto photosensitive pressure sensitive paper immediately before or after exposure. White light is used as such light that has no correlation with the original. By doing so, it is possible to improve the gamma characteristics of the photosensitive pressure sensitive paper and form an image with high gradation.

Further, in the photosensitive and pressure sensitive paper, the sensitivity of curing of the photocurable resin changes depending on the environmental temperature change during exposure, and the degree of the change differs depending on the color of the reaction light. Therefore, when the temperature inside the device increases, the color density and color balance of the output image change due to these changes in sensitivity. Therefore, in order to avoid this problem, a planar heating device or a cooling fan is installed to keep the temperature at the exposure position constant.

[Problems to be Solved by the Invention] However, as described above, the method of keeping the temperature inside the device constant using a planar heating device or a cooling fan is not effective when the outside air temperature is high.

Therefore, there was a problem that the permissible operating temperature of this device was narrow.

Furthermore, even when the outside air temperature is sufficiently low, it takes several seconds to several tens of seconds for the temperature to reach the allowable level after the sheet heating device or cooling fan is activated, which poses the problem of hindering rapid image formation. Two.

Further, through research conducted by the present applicant and others, it has been newly clarified that there is a close relationship between the temperature during exposure of the photosensitive and pressure sensitive paper and the gamma characteristics of its color development. In other words, when the temperature at the time of exposure is higher than the normal temperature, the sensitivity of magenta and cyan becomes particularly good (that is, it becomes difficult to develop color), and the gamma characteristics of yellow are improved. By utilizing this property, it is possible to form more stable images than with conventional devices. Therefore, there is a demand for an apparatus that can form high-quality images by utilizing this property.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide an apparatus that has a wide allowable temperature range and is capable of rapid image formation at a low cost.

Furthermore, the present invention has been made in response to the above-mentioned needs, and an object of the present invention is to provide an apparatus capable of forming high-quality images when photosensitive pressure-sensitive paper is used as a photosensitive recording medium.

[Means for Solving the Problems] In order to achieve the above object, a first invention provides an exposure means for exposing a photosensitive recording medium by irradiating the photosensitive recording medium with light having image information; spectral characteristic adjusting means for changing the spectral characteristics of light irradiated onto the photosensitive recording medium by the means; measuring means for measuring the temperature of the photosensitive recording medium exposed by the exposing means; It is characterized by comprising a control means for controlling the spectral characteristic adjusting means to correct the coloring characteristics of the photosensitive recording medium according to the measured temperature.

Furthermore, a second invention includes, in the control means, an optimum value determining means for determining an optimum correction value by the spectral characteristic adjusting means corresponding to the temperature measured by the measuring means, and a manual input means for inputting desired coloring characteristics. and a correction means for changing the correction value determined by the optimum value determination means in accordance with the correction factor resulting from the input value input by the manual input means.

Furthermore, a third aspect of the present invention includes an exposure means for exposing the photosensitive recording medium by irradiating the photosensitive recording medium with light having image information; and an exposure means located near the photosensitive recording medium exposed by the exposure means, a measuring means for measuring the temperature of the photosensitive recording medium; a sub-exposure means for irradiating the photosensitive recording medium with light uncorrelated with the image information; and a sub-exposure means for changing the spectral characteristics of the light irradiated by the sub-exposure means. It is characterized by comprising an exposure characteristic adjusting means and a control means for operating the sub-exposure characteristic adjusting means in accordance with the temperature measured by the measuring means.

Note that the above-mentioned coloring characteristics refer to the characteristics of color correspondence of the formed image to the original image.

[Operation] In the apparatus having the configuration of the first invention having the above configuration, the measuring means measures the temperature of the photosensitive recording medium (which can also be substituted by a temperature in the vicinity thereof). The control means controls the spectral characteristic adjustment means based on the measured temperature in order to correct changes in the characteristics of the photosensitive recording medium due to temperature. The spectral characteristic adjustment means adjusts the spectral characteristics of the light irradiated onto the photosensitive recording medium in accordance with the control by the control means. In this state, the exposure means exposes the photosensitive recording medium. Therefore, it is possible to correct changes in color development characteristics caused by temperature changes in the photosensitive recording medium.

Further, in the device having the configuration of the second invention, the control means has the following function. First, an optimal correction value by the spectral characteristic adjusting means is determined corresponding to the temperature measured by the measuring means. Then, the correction value is corrected according to the input value manually input by the manual input means. Then, the spectral characteristic adjusting means is controlled according to the corrected correction value. Therefore, even if the temperature changes, the tone of the image formed based on the value input by the manual input means does not change.

Further, the control means of the third invention controls the sub-exposure characteristic adjusting means according to the temperature measured by the measuring means, and adjusts the spectral characteristics of the light used for the sub-exposure processing performed by the sub-exposure means. . For this reason, even when using photosensitive recording media such as photosensitive and pressure sensitive paper whose color development characteristics change depending on temperature, sub-exposure can be performed over a wide range of temperatures without destroying the gradation of the formed image. Become. When this third invention is used in combination with the first invention, further effects can be expected.

[Example] DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments embodying the present invention.

In the photosensitive and pressure sensitive copying machine 1 of this embodiment, as shown in FIG.
and color developer paper 28 (hereinafter referred to as recording paper) are used.

This microcapsule paper 12 has the following characteristics. FIG. 2 is a graph corresponding to the sensitivity characteristics of microcapsule paper. The value on the vertical axis of this graph is the average value of the common logarithmic value of the energy amount of each light required to produce 10% and 90% density for each color of yellow, magenta, and cyan on color developer paper. . The reciprocal of this value corresponds to the sensitivity for each color. This graph shows the change in that value in the temperature range of 20 degrees to 40 degrees. In this figure, the vertical axis is the common logarithm value of the energy of light of the corresponding color, and increasing this value by 1 indicates that 10 times as much energy is required. In other words, the smaller the value on this vertical axis, the higher the sensitivity. As can be seen from this figure, the sensitivity of the microcapsule paper as a whole tends to increase as the temperature increases. Furthermore, due to the difference in sensitivity to each color, when microcapsule paper is uniformly exposed to white light, the higher the temperature, the more yellow the developing paper develops.

Further, FIG. 3 shows values corresponding to the gradation characteristics of microcapsule paper. The value on the vertical axis of this graph is
It is the difference between the common logarithmic values of the amount of energy of multiple lights required to produce 0% and 90% densities. These values correspond to the dynamic range of light amount for each color. Since the dynamic range of the amount of color development is constant, the larger the dynamic range of the amount of light, the lower the gamma value and the greater the gradation. As you can see in this picture, it's cyan.

As for magenta, the dynamic range of light intensity becomes narrower as the temperature rises. However, when it comes to yellow, its dynamic range widens as the temperature rises.

Therefore, in order to effectively utilize the characteristics of microcapsule paper as described above, it is sufficient to shift the spectral characteristics of main exposure light (exposure according to the original image) toward the yellow side at high temperatures. Also, since the overall sensitivity has increased, the total amount of light needs to be reduced. In this case, the dynamic range of the light amount becomes wider for yellow (the gamma value becomes lower and gradation appears), but the dynamic range of the light amount becomes narrower for other colors (there is no gradation). Therefore, the amount of sub-exposure should be increased in accordance with the characteristics of magenta and cyan, and the blue component of the light for sub-exposure should be reduced.

At the top of the copying machine 1, there is a document table glass 2 and a document table cover 3.
A desired original 4 is placed on the original platen glass 2.
is placed face down and the document table cover 3 is closed.

A halogen lamp 5a and a reflector 5b are provided below the document table glass 2 in the upper part of the copying machine 1.

A light source unit 5 equipped with a reflecting mirror 8 and the like is disposed so as to be movable back and forth along a shaft 13 extending parallel to the document table glass 2. The light source section 5 irradiates light onto the document table glass 2 in a line in a direction perpendicular to the movement direction.

The irradiated light passes through the transparent document platen glass 2 and is reflected downward by the document 4 placed thereon.

A mirror portion 9 including reflective mirrors 9a and 9b is disposed below the document table glass 2 and is movable separately from the light source section 5, and the light reflected from the document 4 is reflected by the reflective mirrors 8.
The light beams 9a and 9b are reflected in this order and guided in parallel to the moving direction of the light source section 5.

A projection lens 7, which is usually fixed, and a filter unit 6 for adjusting the color tone of the copied image are disposed below the document glass 2. As shown in FIG. 5, within this filter unit 6, three color filters 61, 62, and 63 of yellow, magenta, and cyan are arranged at predetermined intervals.

These color filters 61, 62, 63 are supported by a known guide frame. These color filters 6
A rack 61 is installed on the side surface extending in the vertical direction of 1.62.63.
a, 62a, 63a are formed, each rack 61a, 62
a, 63a are step motors 65, 66, 67 respectively
pinion gears 65a, 66a attached to the rotating shaft of
67a. Therefore, each color filter 61
, 62 and 63 are step motors 65 and 66°6, respectively.
7, it is possible to insert an arbitrary amount into the optical path.

This insertion direction is a direction in which the light passing through the color filter is uniformly irradiated across the width direction of the microcapsule paper 12. Further, each step motor 65, 66, 67 is controlled by a control circuit 70, which will be described later. By interposing one or two of these color filters 61 to 63 in the optical path, it becomes possible to arbitrarily adjust the hue of the light from the original.

The light reflected by the reflecting mirror 9b enters the projection lens 7. The light projected by the lens 7 is reflected by reflection mirror groups 10a and 10b.

An exposure table 11 for exposing the microcapsule paper 12 is disposed on the right side of the reflection mirror 10b, and a temperature sensor 11b is disposed on the back side of the exposure surface of the exposure table 11. A reflecting mirror 10c for switching the optical path is disposed between them. Image information on the document 4 is formed on the microcapsule paper arranged along the exposure table 11.

In addition, although the reflecting mirrors 10a and 10b are normally fixed, they are set when enlarging or reducing the size of the latent image formed on the microcapsule paper 12, and are used to change the optical path length according to a change in projection magnification. It is configured to be able to move integrally in the axial direction of the shaft 13.

On the other hand, a cartridge 15 is disposed in the center of the copying machine 1, and the elongated microcapsule paper 12 is housed in the cartridge 15, which is removable from the machine while being wound around the cartridge shaft 14. With the cartridge 15 set at a predetermined position within the machine, the leading end of the microcapsule paper 12 is pulled out toward the exposure table 11.

A sub-exposure unit 50 is arranged on the path of the microcapsule paper 12 downstream of the exposure table 11. The configuration of this sub-exposure unit is shown in FIG. Sub exposure unit 5
0 is provided at a position facing the photosensitive surface of the microcapsule paper 12. In the figure, arrow A indicates the direction in which the microcapsule paper 12 is transported. This sub-exposure unit 50
is covered with a sub-exposure unit cover 51, and is configured to irradiate light only to the position of the microcapsule paper 12 facing the sub-exposure unit 50. Inside thereof, a sub-exposure halogen lamp 52 that emits white light is installed with the width direction of the microcapsule paper 12 as the longitudinal direction. The length of this sub-exposure halogen lamp 52 is slightly longer than the width of the microcapsule paper 120, so that the sub-exposure halogen lamp 52 can perform sub-exposure evenly over the entire width of the microcapsule paper 12. be. Yellow, magenta, and cyan color filters 53.5455 are attached between the sub-exposure nozzle lamp 52 and the microcapsule paper 12. Racks 53a, 54a, 55a are attached to the sides of these color filters 53, 54, 55, and pinion gears 5 attached to step motors 56, 57, 58, respectively, are attached to the racks 53a, 54a, 55a.
6a, 57a, and 58a. The rotation of the pinion gears 56a, 57a, and 58a causes them to move in the same direction as the arrow A. As a result of this movement, it enters or retreats from the hole 51a provided in the sub-exposure unit cover 51. These step motors 56,
57 and 58 are connected to a control circuit 70 which will be described later.

Further, a diffusion plate 57 is attached between these color filters 53, 54, 55 and the microcapsule paper 12. Further, a mechanism for varying the light amount of the sub-exposure halogen lamp 52 is not provided. However, by inserting all the color filters 53, 54, 55 into the optical path at the same time, it is possible to adjust the amount of light by blocking light across the entire spectrum. At this time, as an initial setting, it is necessary to predetermine the light amount of the sub-exposure halogen lamp 52 based on a state in which all the color filters are half inserted into the optical path.

A feed roller 19 and a tancer roller 21 for tension adjustment are provided below the exposure table 11. To the right of the dancer roller 21 is a large diameter pressure roller 22a1.
A pressure developing device 22 including a small-diameter pressure roller 22b1 and a back-up roller 22c is disposed, and on the right side of the pressure developing device 22, a microcapsule paper 12 and a color developer paper 28 are placed in close contact with each other as will be described later. A separation roller 23 for separating the microcapsule paper 12 is provided, and a take-up shaft 24 for inserting and holding the microcapsule paper 12 is provided between the separation roller 23 and the cartridge 15. The microcapsule paper 12 coming out of the upper part of the cartridge 15 is guided by a tensicon roller 19 and passes above the exposure table 11, then passes a dancer roller 21, a pressure developing device 22, and then a separation roller 23. Rear winding shaft 2 guided by
It is wound up in 4. Note that the unexposed microcapsule paper 12 after leaving the cartridge 15 is maintained in an unexposed state by the light shielding cover. A paper feed cassette 29 containing developer paper 28 is installed below the pressure developing device 22 . Above the paper feed cassette 29, a suction cup-type paper feed mechanism 30 that sucks paper using negative pressure suction is disposed, and the developing paper 28 is taken out one by one by the paper feed mechanism 30. A feed guide 31d1 and feed rollers 31a, 31b, and 31c are provided between the paper feeding mechanism 30 and the pressure developing device 22, and the developer paper 28 is fed by the feed rollers 31a, 31b, and 31c.
31c and a feed guide 31d, and is carried into the pressure developing device 22.

A heat fixing device 32 is disposed to the right of the pressure developing device 22, and a paper discharge tray 33 for storing the developer paper 28 on which an image is formed is disposed to the right of the heat fixing device 32. ing.

Furthermore, this copying machine has an autoloading function for automatically setting the microcapsule paper 12 on a predetermined transport path within the apparatus.

This is a function that automatically pulls out the leader film part attached to the tip of the microcapsule paper 12 into the apparatus, transports it inside the apparatus, and winds it around the winding shaft 24. As a result, the microcapsule paper 12 following the leader film section 18 is also wound up on the winding shaft 24, and the setting in the apparatus is completed.

For this automatic loading, a half-moon roller 17 is provided between the roller 19 and the cartridge 15 for pulling out the leader film section, and a take-up shaft 24 is provided between the roller 19 and the cartridge 15.
A separation chute 27 is rotatably attached to guide the user. A winding guide 25A and a winding guide 26B are arranged around the winding shaft 24 for winding the leeter film.

Next, the control circuit 70 will be explained with reference to FIG. This control circuit is configured with a central processing unit (hereinafter referred to as CPU) 71 as its core.

A read only memory (hereinafter referred to as ROM) 72 and a random access memory (hereinafter referred to as RAM) 73 are connected to the CPU 71 as storage devices. This R.O.
The M72 stores a program describing the operation of the CPU 71 and various parameters. The stored contents include a look-up table 72a in which the exposure temperature and the optimum control conditions for the filter unit 6 and the sub-exposure unit 50 corresponding to the temperature are stored. This lookup table 72a will be described later. Furthermore, this C
PU71 has a parallel input/output boat (
(hereinafter referred to as PIO) 73 is connected. This PIO
73 includes the step motors 56, 57, 58, 65.
66 and 67 are connected, and the CPU 71 can control these motors. This PIO 73 is further connected to switches on an operation panel 74, and the CPU 71 can detect the states of these switches. Furthermore, this PI0
Attached to 73 is a light source drive circuit 75 that controls the amount of light emitted from the halogen lamp 5a that controls the amount of light from the light source. Further, the output terminal of the A/D converter 77 is connected to the PI073. The input terminal of this A/D converter 77 is connected to the temperature sensor Ilb.

The lookup table 72a is configured as follows. This lookup table starts from address A (offset value) in ROM 72. The value output by the A/D converter 77 corresponds to the temperature T of the microcapsule paper 12 on the exposure table. ROM whose address is the value obtained by multiplying this value by 7 and adding the offset value A.
In the memory cell 72, the optimal insertion 1LL1 of the yellow color filter 61 at the temperature T during main exposure is stored. This insertion amount L1 is expressed by the number of steps of the step motor 65 required to move the yellow color filter 61 located at a reference position, which will be described later, to an optimum position. Further, the insertion amount L2 of the magenta color filter 62 is stored in the memory cell at the next address, and the insertion amount L3 of the green color filter 63 is stored in the memory cell at the next address in a similar manner. Furthermore, from the next address, each color filter of the sub-exposure unit 50 is inserted JIL4. L5. L6 is memorized. The drive current value ■ of the halogen lamp 5a is stored in the seventh address.

These insertion amounts Ll to L6 and current I are experimentally determined for each temperature, and have the following overall tendency.

(1) The larger T is, the more L2. L3 becomes larger.

(2) The larger T is, the smaller ■ becomes.

(3) The larger T is, the larger L4 becomes.

(4) T or big L5. L6 becomes smaller.

The operation panel also includes a power switch, a copy start switch, a color adjustment switch, a sub-exposure switch, and a magnification setting switch.

Next, the operation of this copying machine will be explained.

When the cartridge 15 is set in the copying machine 1, autoloading starts.

The half-moon roller 17 rotates once to several times in the conveyance direction only when autoloading starts, and the leader film section 18
is sent out to roller 20. Thereafter, it stops, and subsequent conveyance is performed by driving the rollers 20.

The winding guide A 25, the winding B guide 26, and the separation chute 27 are rotated to the positions shown by the - dotted chain line, and the leader film section 18 attached to the tip of the microcapsule paper 12 is wound around the winding shaft 24. When (autoloading) is completed, the winding guide 25A, winding guide 26B, and separation chute 27 return to the positions shown by solid lines.

The above processing is performed when the cartridge is installed.

Next, each filter is saved. First, each step motor! 56, 57, 58, 65, 66 degrees 67 are rotated and urged in a direction in which each color filter is retracted from the optical path. Then, it waits in this state for a predetermined period of time. Through this process, all the color filters move to a position away from the optical path (reference position), and in that state, each step motor loses synchronization and stops. This process is performed when the power is turned on. After these processes, copying becomes possible.

Next, the operation after the copy start key on the operation panel is pressed will be explained with reference to the flowchart shown in FIG.

The CPU 71 monitors each switch on the operation panel via Pr073. When the copy start key is pressed (START), the CPU 71 executes A via the PIO 73.
/D converter 77 output value is read and RAM7
3 (Sl). The value output by the A/D converter 77 is a digitized value of the output from the temperature sensor 11, and this temperature is approximately the same as the temperature of the microcapsule paper 12 on the exposure table.

Next, the CPU 71 refers to the lookup table 72a stored in the ROM 72 based on the value T read at Sl (hereinafter referred to as temperature data) (S2).
. Through this process, the optimum insertion amount of each color filter at the above temperature is read out. After that, the insertion amounts of the yellow, magenta, and cyan color filters 61, 62, and 63 of the filter unit 6 read out in this process are sequentially Lll.
2. It is expressed as L3. Further, the insertion amounts of the yellow, magenta, and cyan color filters 53, 54, and 55 in the sub-exposure are sequentially L4. L5. It is L6.

Next, the CPU 71 uses the operation panel 77 via Pr073.
The state of the color adjustment switch is read (S3). This color adjustment switch is set to a desired color correction state by the user. The CPU 71 adjusts the LL, L2, . Correct L3 (S4).

The color adjustment switch of this embodiment has five levels of instruction possible, from plus two levels to minus two levels, for each of yellow, magenta, and cyan. For example, if the color adjustment switch instructs to increase the yellow color by +2 levels, the color filter 61 is increased by Lll, which indicates the insertion amount of the yellow color filter 61. Also, if it is instructed to strengthen red by +2 levels, LL indicates the insertion amount of yellow and magenta color filters 61 and 62.
, L2 is increased by 1.

Next, the CPU 71 actually moves each color filter based on the optimal insertion amount of each color filter obtained as described above. Note that only the insertion of the yellow color filter (S5) will be described in detail here. First, the variable P1 indicating the current position of each color filter is read from the RAM 73 (
S51), calculate the value D1 which becomes Ll-Pl (S51).
52). Although this Pl is reset to O when the power is turned on, it is corrected in the second and subsequent image forming processes by the process of S54, which will be described later. The CPU 71 then drives the step motor 65 by the same number of steps as this value D1 (S53). However, when this value D1 is positive, the step motor 65 is rotated to the side where the color filter 61 is inserted, and when it is negative, the step motor 65 is rotated to the side where the color filter 61 is retracted. Next, Dl is added to the value of P1 and the resulting value is stored in the RAM 73 as a new Pl.

Next 36. Similarly, in S7, other color filters 6
2. Move 63.

Next, the CPU 71 reads the status of the sub-exposure switch (S
8), the process branches as follows depending on the state (S9).

First, if the sub-exposure switch is on, SLo, 811. S
12, the color filters 53 and 54 are installed similarly to S5 above.
．． Move 55.

Then turn on the halogen lamp 52 for sub-exposure 513)
, and proceeds to the process of S14. If the sub-exposure switch is off, the process branches directly to 814 in S12.

In S14, image formation is performed as follows.

First, the CPU 71 moves the reflection mirror 8 and the halogen lamp 5a. If the transport speed of the microcapsule paper 12 is V and the projection magnification is m, these move at a moving speed of V/m, and the reflecting mirrors 9a and 9b move at a moving speed of V/(2*m
) to move.

Then, the CPU 71 supplies a current 2 to the halogen lamp 5a to turn it on.

The conveyance speed of the microcapsule paper 12 is determined by the mirror group 8.9a.
, 9b is synchronized as described above,
Latent images of predetermined lines of the document 40 are sequentially formed on the microcapsule paper 12 as it passes through the exposure stage 11 . Note that the above-mentioned predetermined speed ratio is predetermined based on the setting of the magnification.

The microcapsule paper 12 on which the latent image has been formed is transported,
The topmost color developing paper 28 of the paper feed cassette 29 is fed to the paper feed mechanism 30.
, conveyed by feed rollers 31a, 31b, 310, etc.

The pressure developing device 22 is supplied with the microcapsule paper 12 and the color developer paper 28 in close contact with each other and integrated, and the microcapsule surface on which the latent image of the microcapsule paper 12 is formed and the color developer of the color developer paper 28 are supplied. The agent-applied surface is integrally sandwiched between the large-diameter pressure roller 22a and the small-diameter pressure roller 22b in a state in which they are in contact with each other on the inside, and pressure is applied. This pressure destroys the unexposed microcapsule paper, and the developer paper 28
An image is formed on top.

The microcapsule paper 12 and the color developer paper 28 that have come out of the pressure developing device 22 are separated by a separation roller 23, and then the color developer paper 28 is accelerated in color development by a heat fixing device 32 to form an image. The paper ejection tray 33 is moved by the paper ejection roller 32b.
It will be transported to In addition, the separated microcapsule paper 12
is wound onto the winding shaft 24 via the separation roller 23e.

With this, the process of 814 ends. When the process of 314 is completed, the process of forming images for -sheets is completed.

In addition, in this example, a manuscript copying machine was used, but
The range of applications is extremely wide, such as slide film copying machines, printers using CRTs, lasers, etc.

Further, in this embodiment, although the hue is controlled by controlling the filter, the hue may be changed by providing a light source for each color and controlling the amount of light emitted from each light source.

Further, the sub-exposure method is not limited to this embodiment, and the following method may be used. First, a white reflector extending in the width direction of the document table is movably arranged like a halogen lamp. In this way, the microcapsule paper is irradiated with a mixture of the light reflected by the original and the light reflected by the white reflector. The light reflected by this white reflector contributes to sub-exposure. By partially covering the white reflector with a color filter or a colored reflector, the spectrum of light used for sub-exposure can be changed. However, when sub-exposure is performed using such a device, the light for sub-exposure will also be affected by the color filters 61, 62, and 63, so this must be taken into account when creating the data for the lookup table. There is.

Further, in the embodiment described above, the degree of adjustment by the color adjustment switch is set to five levels, but it is also possible to input the degree in percentage using a numeric keypad. For example, when an instruction is given to increase the yellow component by 50 percent (inputting 150 percent) using the numeric keypad, the CPU only needs to multiply Ll by 1.5 in the process of S4 in the above embodiment.

Various other modifications can be made without departing from the spirit of the invention.

``Effects of the Invention As is clear from the above detailed description, the image forming apparatus of the present invention can be used over a wide range of allowable temperatures and can form images quickly.

A further object of the present invention is to provide an apparatus capable of forming high-quality images by utilizing the properties of light-sensitive pressure-sensitive paper when used as a photosensitive recording medium.

[Brief explanation of drawings]

1 to 7 show embodiments embodying the present invention. FIG. 1 is a block diagram of the part responsible for controlling the device of this embodiment, and FIGS. 2 and 3 are microcapsules. 4 is a cross-sectional view showing the outline of the apparatus of this embodiment; FIG. 5 is a view showing the configuration of the filter unit; FIG. 6 is a view showing the configuration of the sub-exposure unit; FIG. The figure is a flowchart showing the control. In the figure, 5a is a halogen lamp, 11b is a temperature sensor corresponding to the measuring means, 52 is a halogen lamp for sub-exposure corresponding to the sub-exposure means, and 53, 54, 55 is a color filter 61 corresponding to the sub-exposure characteristic adjusting means. , 62 and 63 are color filters corresponding to the spectral characteristic adjustment means, and 71 is a CPU corresponding to the control means. 74 is an operation panel including a manual input means, s2 is a processing block corresponding to the optimum value determining means, and s3 is a processing block corresponding to the manual input means. Ivy and s4 are processing blocks corresponding to the optimum value determining means, and slo, S11 and S12 are processing blocks corresponding to the control means of the third invention.

Claims (1)

[Scope of Claims] 1. Exposure means for exposing the photosensitive recording medium by irradiating the photosensitive recording medium with light having image information; and spectral characteristics of the light irradiated onto the photosensitive recording medium by the exposure means. a spectral characteristic adjusting means for changing the spectral characteristics; a measuring means for measuring the temperature of the photosensitive recording medium exposed by the exposing means; An image forming apparatus comprising: a control means for controlling a spectral characteristic adjustment means. 2. The image forming apparatus according to claim 1, wherein the control means includes an optimum value determining means for determining an optimum correction value by the spectral characteristic adjusting means corresponding to the temperature measured by the measuring means; The present invention is characterized by comprising: a manual input means for inputting coloring characteristics; and a changing means for modifying the correction value determined by the optimum value determination means in accordance with the input value input by the manual input means. Image forming device. 3. Exposure means for exposing the photosensitive recording medium by irradiating the photosensitive recording medium with light having image information; sub-exposure means for irradiating the photosensitive recording medium with light uncorrelated with the image information; and the exposure. a measuring means that is located near the photosensitive recording medium exposed by the means and measures the temperature of the photosensitive recording medium during the exposure; and a sub-exposure characteristic adjusting means that changes the spectral characteristics of the light irradiated by the sub-exposure means. and a control means for operating the sub-exposure characteristic adjustment means in accordance with the temperature measured by the measurement means.