JPH08314018A - Copying method and copying device using it - Google Patents

Abstract

PURPOSE: To provide a diazo copying method and a diazo copying device using the method which can be applied even to an original whose light transmissivity is not so good and by which excellent image reproducibility is obtained while restraining the rising of running cost even when such an original is used. CONSTITUTION: In a state where the surface to be copied of the original 21 is brought into contact with the photosensitive surface 22B of a diazo photosensitive copying paper 22, photoirradiation is performed from the base material 22A side of the paper 22 so as to expose an image on the surface 22B of the paper 22 with the aid of a difference between reflected light from the image part and that of the non-image part of the original 21. Thus, the copied image is formed by using the paper 22 where uniform light transmissivity is set regardless of the light transmissivity of the original 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying method and a copying apparatus using the same, and more particularly to a diazo copying method and a diazo copying apparatus using the same.

[0002]

2. Description of the Related Art A diazo copying machine is known as one of copying machines. A diazo copier is a device that produces a visible image by exposing the original and photosensitive paper in an overlapping state and developing only the photosensitive paper with a diazo developer to color the area corresponding to the image part of the original. is there.

A typical structure of a photosensitive paper used in a diazo copying machine has a photosensitive layer provided on the surface of a substrate, and a diazonium salt is used for the photosensitive layer. In the photosensitive layer, the photodecomposition characteristic of the diazonium salt changes due to the difference in the light transmittance between the image area and the non-image area of the document due to the light irradiation during the exposure. The wavelength range of light in which the photolysis of the diazonium salt is performed is the ultraviolet range having 300 to 480 nm,
The exposure source used for this purpose is, for example, a fluorescent lamp. When the original is placed on the base material side of the photosensitive paper and the light for exposure is irradiated from the original side, the light transmittance of the portion corresponding to the image part of the original is low, so the photolysis of diazonium salt is low, and In the portion corresponding to the non-image portion, the diazonium salt is photodecomposed and disappears due to the high light transmittance.

The exposed photosensitive paper, after being separated from the original, is subjected to color development processing in a portion corresponding to the image area by development. When the development processing is wet, an OH group called a coupler is used. Organic amine-based diazo dye (ArN ₂
ArOH) is used for development. In the developing step, the cyazonium salt binds to the coupler to form an azo dye, and color is developed, whereby the remaining diazonium salt corresponding to the image area is colored and the image area is subjected to visible image processing.

FIG. 9 is a diagram showing an example of a diazo copying machine having a configuration for executing the above-mentioned wet development processing.
In the figure, reference numeral 1 indicates an original on which an image to be copied is formed, and the original is made of a material capable of transmitting light. The original 1 is the photosensitive surface 2 described above.
It is introduced into the diazo copying machine in a state of being polymerized with the photosensitive paper 2 having A. Inside the diazo copying machine, an insertion table 3 for introducing the original 1 and the photosensitive paper 2 in a superposed state, a light irradiation section 4 for irradiating light for exposure, the original 1 and the photosensitive paper 2 are provided.
Separating section 5 for separating the sheet, a conveying roller 6 for discharging the separated document 1 toward the outside of the copying machine, and a developing section 7 for developing the photosensitive paper 2.
Are provided respectively. As the light irradiation section 4, a fluorescent lamp capable of obtaining a light-sensing wavelength range of 300 to 480 nm of diazo photosensitive paper is used. In the copying machine shown in FIG. 9, 6
A 0 W fluorescent lamp is built into a rotatable transparent tube.

The developing section 7 uses a wet developing method using an organic amine type diazo dye (ArN ₂ ArOH) having an OH group called a coupler, and is used in the tank 7A for storing the diazo dye and the diazo dye. A rotatable drawing-up roller 8 in which a part is immersed, and a coating roller 9 that can rotate while contacting the peripheral surface of the drawing-up roller 8 and can contact the photosensitive surface of the diazo photosensitive paper 2 and cooperate with the coating roller 9. The diazo photosensitive paper 2 is provided with a pressure roller 10 which can be nipped and conveyed.

In the light irradiation section 4, as shown in FIG. 10, ultraviolet light corresponding to the irradiation light L is transmitted from the original 1 side to the photosensitive surface 2A of the diazo photosensitive paper 2. On the photosensitive surface 2A of the diazo photosensitive paper 2, as described above, the degree of light disappearance of the diazonium salt differs depending on the difference in transmitted light from the image area A of the original 1 and the other non-image areas. In FIG. 10, reference numeral P1 indicates light that passes through the image portion of the document 1, reference numeral P2 indicates light that passes through the non-image portion, and the relation of these transmitted light is P2> P1.

In the developing section 7, as described above, the cyanazonium salt remaining on the photosensitive surface 2A of the diazo photosensitive paper 2 is combined with the coupler to form an azo dye, which develops a color to correspond to the image area. The remaining diazonium salt is colored and the image portion is subjected to visible image processing.

[0009]

By the way, in such a diazo copying machine, an image on the photosensitive surface is formed by utilizing the difference in the light transmission obtained between the superposed original and the photosensitive paper at the light irradiation section. Although the color development control is performed between the image area and the non-image area, the light transmittance of the document located on the light irradiation side is important in order to obtain a good difference in light transmittance. Therefore, the types of originals are limited. If a document with poor transparency is to be copied, the output of the light source used for light irradiation must be increased in order to increase the light transparency, which increases the running cost of the copying machine. It may rise.

The following method has been proposed as a copying method using the above-mentioned original having poor light transmittance. This method uses semi-transparent thermal paper and performs flash exposure from the thermal paper side with the thermal layer of the thermal paper superposed on the original side to absorb and generate heat in the image and non-image areas of the thermal layer. This is a method of executing the visible image processing of the image portion by controlling the color development in the thermosensitive layer by utilizing the difference in the amount. According to this method, the heat-sensitive layer corresponding to the image portion of the document has a large amount of light absorption and heat generation, and the temperature is high, so that color is easily generated. On the other hand, in the heat-sensitive layer corresponding to the non-image portion of the document, the amount of heat generated by absorption is small and the temperature does not rise, so that coloration is less likely to occur. In this way, color control is performed corresponding to the image portion and the non-image portion of the document (for example, Japanese Utility Model Laid-Open No. 63-63464). Further, as a method similar to this, there is the Culver method or the like.

However, in this method, the flash lamp used as the exposure light source is more expensive than the light source used in the diazo copying method. Moreover, in order to clarify the difference between the color-developed portion obtained by heat generation and the non-color-developed portion that is not so much heated, it is necessary to provide the original image with black having a relatively high density. For this reason,
The condition that there is a large amount of carbon as a material that emits black is required, and this also causes a problem that the type of original used is specified. Also, if the original is a good heat conductor such as a metal plate,
When exposed, heat is transferred from the heat-sensitive layer, the amount of heat generation for obtaining good color development cannot be obtained, and a defective image may be formed.

Therefore, in view of the above-mentioned problems in the conventional copying method and the copying machine using the same, the object of the present invention can be applied to a manuscript whose light transmittance is not so good, and such a manuscript is used. It is an object of the present invention to provide a copying method capable of suppressing an increase in running cost and obtaining good image reproducibility and a copying apparatus using the copying method.

[0013]

In order to achieve the above object, the invention according to claim 1 irradiates exposure light in a state where an original is brought into close contact with a photosensitive paper having a photosensitive surface on a substrate, In a copying method in which an original image is copied by exposing the photosensitive paper to light, the copy surface of the original and the photosensitive surface of the photosensitive paper are brought into close contact with each other, and light is irradiated from the base material side of the photosensitive paper to make the original of the original. It is characterized in that an image is exposed on the photosensitive surface of the photosensitive paper by the difference in reflected light from the image portion and the non-image portion.

According to a second aspect of the present invention, there is provided a copying apparatus using the copying method according to the first aspect, wherein a photosensitive surface of a photosensitive paper having a photosensitive surface on a base material and a copy surface of an original are brought into close contact with each other. Of the insertion table to be fed in the above state, and the original and the photosensitive paper fed from the insertion table, which are arranged on the base material side of the photosensitive paper and are movable with the original and the photosensitive paper. Section, a separating section for separating the photosensitive paper irradiated with light by the light irradiation section from the original, and a coating member capable of applying a developer by contacting the photosensitive surface of the photosensitive paper separated by the separating section. And a developing unit provided with.

According to a third aspect of the present invention, the exposure light is irradiated in a state where the original is brought into close contact with the photosensitive paper having the photosensitive surface on the base material, and the photosensitive paper is exposed to light to copy the original image. In the copying method, the surface to be copied of the original document and the base material side of the photosensitive paper are brought into close contact with each other, and light is irradiated from the photosensitive surface side of the photosensitive paper to reflect light from the image portion and the non-image portion of the original document. It is characterized in that the image is exposed on the photosensitive surface of the above-mentioned photosensitive paper depending on the difference.

According to a fourth aspect of the present invention, there is provided a copying apparatus using the copying method according to the third aspect, wherein the base material side of the photosensitive paper having the photosensitive surface on the base material and the copy surface of the original are brought into close contact with each other. Of the insertion table that is fed in this state, the original and the photosensitive paper that are fed from the insertion table, the light that is arranged on the photosensitive surface side of the photosensitive paper and is movable with the original and the photosensitive paper. An irradiating section, a separating section for separating the photosensitive paper light-irradiated by the light irradiating section from an original, and a coating capable of applying a developer by contacting the photosensitive surface of the photosensitive paper separated by the separating section. And a developing unit including a member.

According to a fifth aspect of the present invention, in the copying method according to the third aspect, the photosensitive paper has a base material made of a light-transmissive member.

According to a sixth aspect of the present invention, in the copying method according to the third aspect, the photosensitive paper has a photosensitive surface on both sides of a light-transmissive base material. .

[0019]

According to the first and second aspects of the invention, light is irradiated from the base material side of the photosensitive paper to expose the photosensitive paper side by utilizing the difference in the reflected light from the image portion and the non-image portion of the original. To be done.

According to the third and fourth aspects of the invention, light is irradiated from the photosensitive surface side of the photosensitive paper, and the photosensitive paper side is exposed by utilizing the difference in reflected light from the image portion and the non-image portion of the document. However, the exposed image is formed as a normal image.

According to the fifth aspect of the invention, the image formed on the photosensitive paper can be seen through.

According to the sixth aspect of the invention, the light reflected from the original is transmitted to each of the photosensitive surfaces located on both sides of the photosensitive paper.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the overall construction of a diazo copying machine according to the first embodiment of the present invention. It should be noted that among the members shown in the drawings after FIG. 1, the same components as those shown in FIG. 9 are designated by the same reference numerals, and detailed description thereof will be omitted. In FIG. 1, the diazo copying apparatus 20 has an opening 20B formed in a part of the apparatus main body 20A. The opening 20B is formed for inserting the original 21 (shown by a chain line in FIG. 1) and the photosensitive paper 22 (shown by a solid line in FIG. 1) into the apparatus main body 20A in a superposed state. Note that, in FIG. 1, the original 21 and the photosensitive paper 22 are shown in a state of being separated from each other, but this is a measure for indicating that they are superposed, and in reality, they are in a close contact state. Let me add that.

As shown in FIG. 2, the photosensitive paper 22 is composed of a transparent or semitransparent base material 22A capable of transmitting light and a photosensitive surface 22B made of a diazonium salt.

Inside the opening 20B, there is arranged an insertion table 24 for transferring the original 21 and the photosensitive paper 22 in a superposed state toward a light irradiator 23 described later. Insertion table 2
The original 21 and the photosensitive paper 22 which are transferred from 4 to the light irradiator 23 are superposed with the photosensitive surface of the photosensitive paper 22 in close contact with the copy surface of the original 21.

The light irradiating section 23 has the same wavelength range of 300 to 480 n as that of the diazo photosensitive paper, as in the structure shown in FIG.
A fluorescent lamp capable of obtaining m is used, and in the present embodiment, one 60 W fluorescent lamp is built in a rotatable transparent tube.
The transparent tube is located on the base material side of the photosensitive paper 22 of the original 21 and the photosensitive paper 22 in a superposed state, and can rotate as the original 21 and the photosensitive paper 22 move. As a result, the transparent tube can convey the original 21 and the photosensitive paper 22 while irradiating light.

In the light irradiation section 23, as shown in FIG. 2, light irradiation is performed from the side of the base material 22A of the photosensitive paper 22 by using the irradiation light L, and the irradiation light L is the original 21 having the image portion 21A. Is reflected on the surface to be copied, and the reflected light is reflected on the photosensitive paper 22.
Through the base material 22A to reach the photosensitive surface 22B.

A separation unit 25 is arranged near the light irradiation unit 23. The separating portion 25 is provided for the original 21 in the overlapping state.
Also, of the photosensitive paper 22, the transfer path of the original 21 is set to the photosensitive paper 2
2 is a part that is separated from the transfer path and conveys only the photosensitive paper 22 toward the developing unit 7 described later, and is a pair of feeding rollers 25A and 25A capable of nipping and conveying the original 21 and the photosensitive paper 22.
B and a separator 25C having a toe into which the facing surfaces of the original 21 and the photosensitive paper 22 fed by the feeding rollers 25A and 25B can enter.

The developing section 7 has the same structure as that shown in FIG. 9, and the coating roller 9 can come into contact with the photosensitive surface of the photosensitive paper 22 so as to face it. In FIG. 1, reference numeral 26 indicates a state in which the original 21 and the photosensitive paper 22 in a superposed state are brought into close contact with the transparent tube of the light irradiation section 23 in cooperation with the feeding roller 25A of the separation section 25. The tension roller for winding is shown.

Since this embodiment has the configuration as described above,
The original 21 and the photosensitive paper 22 in which the surface to be copied and the photosensitive surface 22B are brought into close contact with each other are inserted into the inside of the opening 20B of the apparatus main body 20A and set on the insertion table 24, and the next step is performed. Tension roller 26 and separation section 25
The original 21 and the photosensitive paper 22 are stretched around the surface of the transparent tube of the light irradiating section 23 by the feeding roller 25A provided in the above, and the light irradiation from the fluorescent lamp is executed.

During light irradiation, as shown in FIG. 2, the base material 22A of the photosensitive paper 22 is positioned on the light source side of the light irradiation section 23. Therefore, the UV light from the fluorescent lamp is
Of the image portion 21A and the non-image portion corresponding to the other portions.
The reflected light differs between the image portion 21A and the non-image portion. As shown by the size of the arrow in FIG. 2, the reflected light is small in the image portion 21A and is large in the non-image portion. Note that FIG.
In the above, reference numeral R1 indicates the reflected light from the image portion 21A,
Further, reference numeral R2 indicates reflected light from the non-image portion,
The relationship between the reflected lights is R2> R1. Therefore, on the photosensitive surface 22B of the photosensitive paper 22, the amount of the diazonium salt in the portion corresponding to the image portion 21A is large,
Further, the residual amount of the diazonium salt in the portion corresponding to the non-image area becomes small due to active light loss.

The original 21 and the photosensitive paper 22 that have passed through the light irradiating section 23 are separated by the separating section 25, and the photosensitive paper 22 is separated.
Only the sheet is conveyed to the developing unit 7. In the developing section 7, the cyanazonium salt remaining on the photosensitive surface 22B of the photosensitive paper 22 is combined with the coupler to form an azo dye, and color is developed, so that the diazonium salt remaining corresponding to the image area is colored. The image portion is converted into a visible image. The photosensitive paper 22 subjected to the visible image processing in the developing section 7 is in contact with the copy surface of the original 21 and is irradiated with light from the base material 22A side while bypassing the transparent tube of the light irradiation section 23. Because of this, photosensitive surface 2
The image formed on 2B is obtained as a mirror image which is in the opposite direction to the image on the surface to be copied. However, since the base material 22A of the photosensitive paper 22 is transparent or translucent, a normal image can be seen by seeing through the front surface of the base material 22A corresponding to the back surface of the photosensitive paper 22.

According to this embodiment, since the light irradiating section 23 can transmit light from the base material 22A side of the photosensitive paper 22,
It is not necessary to limit the type of original used due to the difference in light transmission.

Next, a modification of the main part of the above embodiment will be described. In the above-described embodiment, the original 21 and the photosensitive paper 22 are automatically conveyed in the apparatus main body 20A, and light irradiation is performed in the conveying process. It is also possible to leave it fixed and carry out the light irradiation and development steps in that state without automatic conveyance.

In FIG. 3, the diazo copying apparatus 30 has a portable mechanism for executing the light irradiation step of the diazo copying step. The diazo copying machine 30 is composed of a casing 30A having a space portion 30B having an opening 30B1 formed on the lower surface thereof and a photosensitive paper stock portion 30C formed above the ceiling portion of the space portion 30B. In the photosensitive paper stock unit 30C, a tray 0C1 that can be inserted and removed is arranged, and the photosensitive paper 22 is stacked and accommodated therein.

Inside the space 30B, a light irradiator 31 having a pair of fluorescent lamps is provided. As the fluorescent lamp used for the light irradiation unit 31, one having a rating of 10 W is used. A pressing plate 32 that projects in the horizontal direction is fixed to the edge of the opening 30B1 of the space 30B. A reflecting member 30D having a mirror surface is arranged on the inner surface of the space 30B.

The photosensitive paper stock section 30C has an opening through which the photosensitive paper 22 can be inserted and removed, and the photosensitive paper 22 housed inside can be taken out.

The original 21 and the photosensitive paper 22 applied to the diazo copying machine 30 having such a structure have the same structure as those used in the embodiment shown in FIG. 1, and the diazo copying machine in a state where they are superposed on each other. The light irradiation part 31 of 30 can be made to oppose.

When copying is executed in such a structure, the photosensitive paper stock section 31 of the diazo copying apparatus 30 is used.
One sheet of photosensitive paper 22 is taken out from the sheet, and its photosensitive surface 22B is brought into close contact with the copy surface of the original 21. The light irradiation process of the original 21 and the photosensitive paper 22 in the superposed state is executed by placing the diazo copying device 30 on the base 22A side of the photosensitive paper 22.

During the light irradiation process, when the diazo copying machine 30 is placed on the surface of the base material 22A of the photosensitive paper 22, the photosensitive paper 22 is pressed by the pressing plate 32 located at the opening edge of the space portion 30B. Depending on the original 21 and the photosensitive paper 22
And are kept in close contact. When the fluorescent lamp of the light irradiation section 31 is turned on in this state, the ultraviolet light is transmitted from the base material 22A side of the photosensitive paper 22 toward the copy surface of the original document 21, and the original document 21 is transmitted.
The reflected light from the surface to be copied reaches the photosensitive surface 22B of the photosensitive paper 22, and the light disappears due to the difference in the amount of reflected light.

The original 21 and the photosensitive paper 22 which have undergone the light irradiation process are made separable by removing the diazo copying device 30. The separated photosensitive paper 22 is
As shown in FIG. 4, a visible image is processed by a developing device 33 prepared separately from the diazo copying device 30. The developing device 33 is configured by a diazo developer storage tank provided with a coating member 33A such as felt capable of allowing the diazo developer to seep out. The developing device 33 holds the diazo developer storage tank while exposing the photosensitive paper 22 to light. The diazo developer is applied by sliding the surface. The developing device 33 includes a coating member 33 for preventing the diazo developer from drying when not in use.
A cap 33B for preventing dust from adhering to A is provided. In FIG. 3, reference numeral 34 indicates a battery box that is provided in the casing 30 </ b> A and that stores the power supply battery for the fluorescent lamp used in the light irradiation unit 31. With such a configuration, since diazo copying can be performed with a simple structure, it is necessary to take the original and the photosensitive paper to the place where the copying apparatus is installed, and then perform the copying work. Is eliminated, and copying work can be performed in the place where the original exists.

In the case of the above construction, the light irradiation step and the developing step in the diazo copying step are executed by different devices, but instead of this, as shown in FIG.
The developing device 33 may be incorporated inside the diazo copying device 30 in the vicinity of the light irradiation part 31. In this case, an opening space 30D having an opening / closing lid (not shown) is formed in a part of the casing 30A, and the developing device 33 is detachably arranged in the space. Further, at a position where the coating member 33A of the developing device 30 and the photosensitive paper 22 face each other, a slit 30E which the photosensitive paper 22 can traverse while being in contact with the coating member 30A is formed. The development process can be performed consistently.

Further, the photosensitive paper stock portion 30C provided in the diazo copying device 30 can be detachably provided in the casing 30A. In this case, as shown in FIG. The ceiling portion of the stock portion 30C can be used as a placement portion for the document 21 and the photosensitive paper 22.

Next, a second embodiment of the present invention will be described. FIG. 7 is a schematic diagram showing the overall structure of a diazo copying machine according to the second embodiment of the present invention. In this embodiment, the photosensitive paper 2
It is characterized in that the image of the original is formed as a normal image on the photosensitive surface of 2. 7, the same components as those shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 7, the diazo copying apparatus 40 has an opening 40B formed in a part of the apparatus main body 40A. The opening 40B is formed so as to insert the original 21 and the photosensitive paper 41 into the apparatus main body 40A in a superposed state.
In FIG. 7, the original 21 and the photosensitive paper 41 are shown in a state of being separated from each other, but this is a measure for indicating that they are superposed, as in the case of FIG. , Close contact.

As shown in FIG. 8, the photosensitive paper 41 includes a semitransparent or transparent base material 41A capable of transmitting light and a photosensitive surface 41B made of a diazonium salt provided on both surfaces of the base material 41A. It is configured.

Inside the opening 40B, an insertion table 24 is arranged for transferring the original 21 and the photosensitive paper 41 in a superposed state toward a light irradiation section 23 described later. Insertion table 2
4 to the light irradiation unit 23 from the document 21 (in the figure,
The two-dot chain line) and the photosensitive paper 41 (indicated by a solid line in the figure) are used to copy one of the photosensitive surfaces 41B of the photosensitive paper 41 to the original 2
It is designed to be polymerized while being in close contact with the copy surface of No. 1.

The light irradiating section 23 has the same wavelength range of 300 to 480 n as the photosensitive wavelength range of diazo photosensitive paper, as in the structure shown in FIG.
A fluorescent lamp capable of obtaining m is used, and in the present embodiment, one 60 W fluorescent lamp is built in a rotatable transparent tube.
The transparent tube is positioned so as to be able to face either the document 21 in a superposed state or the photosensitive surface 41B of the photosensitive paper 41, and can rotate as the document 21 and the photosensitive paper 41 move. This allows the transparent tube to
The original 21 and the photosensitive paper 41 can be conveyed while being irradiated with light.

In the light irradiation section 23, as shown in FIG. 8, light is irradiated from the photosensitive surface 41B side of the photosensitive paper 41, and the irradiation light L is reflected on the copy surface of the original, and the reflected light is reflected. Passes through one photosensitive surface 41B and the base material 41A of the photosensitive paper 41 and reaches the other photosensitive surface 41B.

A separation unit 25 is arranged near the light irradiation unit 23. The separating portion 25 is provided for the original 21 in the overlapping state.
Also, of the photosensitive paper 41, the transfer path of the document 21 is set to the photosensitive paper 4
1 is a part that is separated from the transfer path of No. 1 and conveys only the photosensitive paper 41 toward the developing unit 7 described later. In this embodiment, the photosensitive surface 41 of the photosensitive paper 41 that was in close contact with the copy surface of the original 21.
The direction of B is reversed from the direction of the light irradiation section 23, and one of the photosensitive surfaces 41B that has been in close contact with the surface to be copied can be made to face the coating roller 9 in the developing section 7 to the feeding rollers 25A, 25B. , 25D and a separator 25C are arranged.

The developing section 7 is shown in FIG.
It is similar to the structure shown in. In this embodiment, the photosensitive paper 41
Since the photosensitive surfaces 41B are located on both sides of the above, one photosensitive surface faces the coating roller 9 and the other photosensitive surface faces the pressure roller 10. Therefore, the pressure roller 10 is provided with a diazo developer supply mechanism (not shown).
Also, the visible image processing can be performed on the other photosensitive surface of the photosensitive paper 41. Note that FIG.
In the figure, reference numeral 44 indicates the original 2 with respect to the transparent tube of the light irradiation unit 23.
1 shows a tension roller for wrapping around 1 and the photosensitive paper 41 in a stretched state.

Since this embodiment has the above-mentioned structure,
The original 21 and the photosensitive paper 41, in which the surface to be copied and one of the photosensitive surfaces 41B are in close contact with each other, have an opening 40B in the apparatus main body 40A.
After being inserted from the inside to the inside and set on the insertion stand 24, the next step is carried out. The original 21 and the photosensitive paper 41 are stretched around the surface of the transparent tube forming the light irradiation section 23, and light irradiation from the fluorescent lamp is executed.

Original 21 and photosensitive paper 4 used in the light irradiation step
1 is set to a state in which the copy surface of the original 21 and one photosensitive surface of the photosensitive paper 41 are in close contact with each other. In the light irradiation section 23, as shown in FIG. 8, the other side of the photosensitive surface 41B of the photosensitive paper 41 is located on the light source side of the light irradiation section 23. For this reason,
The ultraviolet light, which is the irradiation light L from the fluorescent lamp, passes through the photosensitive paper 41 and reaches the original 21, and the image portion 21A and the non-image portion 21B are reached.
The reflected light is different between the image portion 21A and the non-image portion 21B. The reflected light is small in the image portion 21A and large in the non-image portion 21B, as shown by the size of the arrow in FIG. Therefore, the photosensitive surface 22B of the photosensitive paper 22 has a large amount of the remaining diazonium salt in the portion corresponding to the image portion 21A, and the diazonium salt in the portion corresponding to the non-image portion 21B is actively lost of light. Due to this, the remaining amount decreases. Note that, in FIG. 8, reference numerals R1 and R2 indicate reflected light similarly to the case described in FIG. 2, and the relationship thereof is R2> R1.

Such reflected light reaches one of the photosensitive surfaces of the photosensitive paper 41, passes through the base material 41A, and reaches the other photosensitive surface. Therefore, the remaining amount of the diazonium salt corresponding to the image portion 21A and the image-receiving portion 21B of the original can be obtained on both photosensitive surfaces of the photosensitive paper 41.

The original 21 and the photosensitive paper 22 that have passed through the light irradiating section 23 are separated by the separating section 25, and the photosensitive paper 22 is separated.
Only the sheet is conveyed to the developing unit 7. In the developing section 7, the diazo developer is supplied toward both photosensitive surfaces of the photosensitive paper 41 by the application roller 9 and the pressure roller 10, and the cyazonium salt remaining on both photosensitive surfaces 41B of the photosensitive paper 41 is combined with the coupler. By generating an azo dye by the above and developing the color, the remaining diazonium salt corresponding to the image portion is colored and the image portion is subjected to a visible image processing. Since one side of the photosensitive paper 41B on which the visible image is processed in the developing section 7 is in contact with the copy surface of the original 21 and the image is directly printed on the photosensitive paper 41B is reversed, the visible image is processed by the coating roller 9. The obtained image is obtained as a normal image.

In the present embodiment, the same images are formed in superposition on the photosensitive surfaces 41B located on both sides of the photosensitive paper 41, so that a copy image with enhanced contrast can be obtained.

It is also possible to apply the modified examples described above with reference to FIGS. 3 to 6 to the above embodiment. That is, the photosensitive paper 41 shown in FIG. 8 may be used for the portable diazo copying apparatus shown in FIG.

[0059]

As described above, according to the first and second aspects of the present invention, the light reflected from the image area and the non-image area of the original is irradiated by irradiating the light from the base material side of the photosensitive paper. The light transmission of the original is not limited because the light is exposed to the side of the photosensitive paper by utilizing the difference. In addition, regardless of the light transmittance of the original, a copy image can be formed only by the difference in the amount of light reflected on the photosensitive surface of the photosensitive paper whose light transmittance is constant in advance. The consumed electric power can also be made constant, which does not increase the running cost of the copying apparatus.

According to the third and fourth aspects of the present invention, by irradiating light from the photosensitive surface side of the photosensitive paper, the difference between the reflected light from the image portion and the non-image portion of the document is utilized to make the photosensitive paper side. However, since the exposed image is formed as a normal image, the image formed on the photosensitive paper can be easily identified regardless of the light transmittance of the document.

According to the fifth aspect of the present invention, it is possible to invert the copy image formed by seeing through the photosensitive paper the image formed on the photosensitive paper, without considering the light transmittance of the original. Even in this case, it is possible to easily identify the copied image.

According to the sixth aspect of the invention, since the same image can be formed on both sides of the photosensitive paper according to the contents of the original, it is possible to obtain a copy image with enhanced contrast and good image reproducibility. become.

[Brief description of drawings]

FIG. 1 is a schematic diagram schematically showing the overall configuration of a diazo copying machine according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining the contents of a light irradiation process executed in the diazo copying machine shown in FIG.

FIG. 3 is a schematic cross-sectional view for explaining a modified example of a main part of the diazo copying apparatus shown in FIG.

FIG. 4 is a perspective view for explaining the configuration of a developing device used in the diazo copying device shown in FIG.

5 is a schematic cross-sectional view for explaining an example in which a part of the modified example of the diazo copying apparatus shown in FIG. 3 is further modified.

6 is a perspective view for explaining a modified structure of a light irradiation unit and a photosensitive paper stock unit of the diazo copying apparatus shown in FIG.

FIG. 7 is a schematic diagram for schematically explaining the overall configuration of a diazo copying machine according to a second embodiment of the present invention.

FIG. 8 is a schematic diagram for explaining the contents of a light irradiation process executed in the diazo copying machine shown in FIG.

FIG. 9 is a schematic diagram for explaining a conventional example of a diazo copying apparatus.

FIG. 10 is a schematic diagram for explaining a light irradiation step carried out by the diazo copying apparatus shown in FIG.

[Explanation of symbols]

 7 Developing Section 20, 30, 40 Diazo Copying Device 21 Original Document 22, 41 Photosensitive Paper 22A, 41A Base Material 22B, 41B Photosensitive Surface 23 Light Irradiating Section

Claims (6)

[Claims] 1. A copying method for copying an original image by irradiating exposure light on a photosensitive paper having a photosensitive surface on a base material while exposing the original to light to expose the photosensitive paper. The surface to be copied of the photosensitive paper and the photosensitive surface of the photosensitive paper are brought into close contact with each other, and light is irradiated from the side of the base material of the photosensitive paper, and the difference of reflected light from the image area and the non-image area of the original causes A copying method characterized by exposing an image on a photosensitive surface. 2. A copying apparatus using the copying method according to claim 1, wherein a photosensitive surface of a photosensitive paper having a photosensitive surface on a base material and a copy surface of an original are fed in a state of being in close contact with each other. Of the insertion table, the original and the photosensitive paper that are fed from the insertion table, the light irradiation unit that is arranged on the base material side of the photosensitive paper and is movable together with the original and the photosensitive paper; And a developing section having a coating member capable of applying a developer by contacting the photosensitive surface of the photosensitive paper separated by the separating section. And a copying apparatus. 3. A copying method for copying an original image by irradiating exposure light on a photosensitive paper having a photosensitive surface on a base material in a state where the original is brought into close contact with the photosensitive paper to expose the photosensitive paper. The surface to be copied and the base material side of the photosensitive paper are brought into close contact with each other, and light is irradiated from the photosensitive surface side of the photosensitive paper, and the photosensitive paper is differentiated by the difference in the reflected light from the image area and the non-image area of the original. A method of copying, which comprises exposing an image on the photosensitive surface of the. 4. A copying apparatus using the copying method according to claim 3, wherein the base material side of the photosensitive paper having a photosensitive surface on the base material and the copy surface of the document are fed in close contact with each other. The insertion table, the original document and the photosensitive paper fed from the insertion table, which are arranged on the photosensitive surface side of the photosensitive paper and are movable with the original document and the photosensitive paper; A developing unit including a separating unit that separates the photosensitive paper light-irradiated by the irradiation unit from the original document, and a coating member that can apply a developer to the photosensitive surface of the photosensitive paper separated by the separating unit. And a copying apparatus. 5. The diazo copying apparatus according to claim 3, wherein the photosensitive paper has a base material made of a light transmissive member. 6. The diazo copying apparatus according to claim 3, wherein the photosensitive paper is one having photosensitive surfaces on both sides of a light-transmitting base material.