JPH1078644A - Developing processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the wrinkles of a processing sheet easily generated at the time of carrying a silver halide photosensitive material and the processing sheet which are stuck to each other, on heating plates. SOLUTION: The developing processor forms an image in such a manner that a film and the processing sheet which are stuck to each other are carried along the surfaces of the heating plates 68A-68E of a thermal developing part 66, to be heated. At this time, heaters 69F-69J in the central parts of the heating plates 68A-68E are set to be temp. suitable for development processing and heaters 69A-69E and 69K and 69O in both end parts are set to be the temp. higher than that of the heaters 69F-69J in the central parts by a fixed temp. Thus, heating is executed in a state where differences in the temp. are made between the central parts and both end parts in the heating plates 68A-68E. Since the expansion of both end parts is greater than that of the central part, in the processing sheet, thermal development processing is attained in the state where the processing sheet and the film are closely stuck, without generating the wrinkles in the processing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide light-sensitive material having an image exposed thereto, and an agent for forming an image on the silver halide light-sensitive material by being bonded to the silver halide light-sensitive material and heated. The present invention relates to a development processing apparatus for forming an image on a silver halide photosensitive material using a processing sheet containing the same.

[0002]

2. Description of the Related Art Lith films (photosensitive materials) have conventionally been used for printing newspapers and magazines. In the squirrel film, the density of each pixel is represented by the density of a black point (halftone dot processing). In the case of color, a film expressing the shade of each color is produced, and a color image can be obtained. .

Conventionally, a lith film has been subjected to various processes such as development and fixing (wet process) in the same manner as a photographic film to form an image, so that the development process is complicated. In addition, since the squirrel film is sequentially immersed in a processing tank in which a processing liquid (a developing liquid and a fixing liquid, etc.) is stored, each processing is performed. This causes a problem that the deterioration of the development processing apparatus itself is accelerated.

On the other hand, the present applicant has developed a developing apparatus capable of developing a photosensitive material such as a lithographic film on which an image is formed without performing complicated processing such as development and fixing (wet processing). is suggesting. The development processing apparatus uses two types of materials, a photothermographic material and a processing material containing a chemical for forming an image on the photothermographic material. The heat-developable photosensitive material is developed by bonding the materials and heating for a predetermined time, and then separating and drying the photothermographic material and the processing material (so-called dry processing).

[0005] In a developing apparatus having such a structure, a liquid containing a chemical such as a processing liquid is not used, so that there is no need to bother the storage and replenishment management of the liquid and to clean the apparatus, and to improve the maintainability of the apparatus. Can be improved.

[0006]

However, a plurality of hot plates are arranged in an arc shape in a heat developing section for bonding a photothermographic material and a processing material and heating them for a predetermined time.
The photothermographic material and the processing material bonded together along the surface of the hot plate are conveyed and heated so that the developing process is performed. Therefore, when the processing material is in the form of a thin sheet, the central portion of the processing material becomes slack and wrinkles occur when the laminated photothermographic material and the processing material are transported along the surface of the hot plate. There is.

As described above, the photothermographic material and the processing material are conveyed along the surface of the hot plate in a state where the processing material is wrinkled. There is a problem that an image cannot be formed.

The present invention has been made in view of the above circumstances, and has as its object to provide a developing apparatus capable of carrying a thermal developing process together with a photothermographic material without wrinkling of the processing material.

[0009]

According to the first aspect of the present invention, there is provided a silver halide light-sensitive material having an image exposed thereto, which is bonded to the silver halide light-sensitive material and heated. And a processing sheet containing an agent for forming an image on a silver halide photosensitive material by using a processing sheet comprising:
Coating means for applying an image forming solvent to at least one of the silver halide light-sensitive material or the processing sheet to which an image has been exposed; a bonding means for bonding the silver halide light-sensitive material to the processing sheet; A heating means for heating the silver halide light-sensitive material and the processing sheet bonded by the bonding means for thermal development processing; Separating means for separating the silver halide light-sensitive material from the processing sheet; conveying means for conveying the silver halide light-sensitive material and the processing sheet bonded by the bonding means along the surface of the heating means; Drying means for drying each of the silver halide light-sensitive material and the processing sheet separated by the above, and an image formed by the heating means. The discharging means for discharging the silver halide photosensitive material separated by the separating means to the outside of the apparatus, and the center of the hot plate of the heating means is at a temperature suitable for the developing process, and both ends are used for the developing process. Heating control means for setting the temperature so as to be higher by a predetermined temperature than an appropriate temperature.

According to the first aspect of the present invention, an image forming solvent is applied to at least one of the silver halide light-sensitive material exposed to an image and a processing sheet containing an image forming agent by an application means. Then, the silver halide photosensitive material and the processing sheet are bonded by a bonding means.
The bonded silver halide light-sensitive material and the processing sheet are transported along the surface of the heating means via the transporting means.
The heating means is configured by arranging a plurality of hot plates in an arc shape. The central portion of the hot plate is set to a temperature suitable for the developing process, and both ends of the hot plate are set to the center temperature (that is, The temperature is controlled by the heating control means so as to be higher by a predetermined temperature than the temperature suitable for the developing process. Accordingly, the silver halide light-sensitive material and the processing sheet are heated while maintaining a predetermined temperature difference between the center and both ends of the hot plate as the heating means. Thereby, since the elongation of both ends of the processing sheet becomes larger than that of the central part, the slack of the central part of the processing sheet, which tends to occur when the sheet is conveyed along the surface of the hot plate, is reduced.
It can be transported without wrinkles. Therefore,
The silver halide light-sensitive material and the processing sheet are transported in a state where they are in close contact with each other, and heated, so that the temperature of the silver halide light-sensitive material reaches a temperature suitable for development processing, and the chemicals contained in the processing sheet together with this. Acts to develop the silver halide light-sensitive material, and an exposed image is formed on the surface of the silver halide light-sensitive material.

After the completion of the development processing, the bonded silver halide light-sensitive material and the processing sheet are separated by a separation means, and after each of them is dried, the silver halide light-sensitive material on which an image is formed is placed outside the development processing apparatus. It is discharged to a predetermined place provided.

According to a second aspect of the present invention, in the heating means, the central portion corresponding to the image forming area of the silver halide photosensitive material is set to a temperature suitable for the developing process, and the both ends corresponding to the outside of the image forming area are developed. It is characterized in that it is set at a predetermined temperature higher than the temperature suitable for processing, heated, and subjected to thermal development processing.

According to the second aspect of the present invention, the bonded silver halide light-sensitive material and the processing sheet are conveyed along the surface of a hot plate and heated to produce a desired image on the silver halide light-sensitive material. Can be formed. At this time, the hot plate as the heating means heats the silver halide photosensitive material and the processing sheet while maintaining a predetermined temperature difference between the center and both ends. The central portion of the hot plate is controlled so as to have a temperature suitable for the developing process, and both ends are controlled so as to be higher by a predetermined temperature than the central portion (that is, the temperature suitable for the developing process).

In the silver halide light-sensitive material, a region where an image is to be formed is predetermined, and a desired image can be formed unless a processing sheet is stuck to the image forming region in a tightly adhered state. Cannot be formed. Therefore, the central portion of the hot plate corresponds to the image forming area of the silver halide photosensitive material, and both ends of the hot plate correspond to the outside of the image forming region of the silver halide photosensitive material. Thereby, the heat development processing is performed in a state where the processing sheet is securely adhered to the image forming area of the silver halide photosensitive material requiring the development processing without wrinkling, so that a desired image can be formed. .

[0015]

FIG. 1 shows the internal configuration of a developing apparatus 10 according to an embodiment of the present invention. The development processing apparatus 10 includes a lithographic film (for example, B5 to A5) for forming a binary image used for printing newspapers and magazines.
(0 size). In the present embodiment, the squirrel film to be subjected to the development processing is hereinafter referred to as a film F.

The film F applied to the present embodiment corresponds to the silver halide light-sensitive material of the present invention, and a light-sensitive silver halide emulsion having a silver chloride content of at least 70 mol% on a support, It contains a hydrophilic binder and a basic metal compound that is hardly soluble in water.

As shown in FIG. 1, the developing device 10
Is formed in a box shape. Development processing device 10
On the right side (in the direction of arrow R), an exposure device 11 for exposing and discharging an image on the film F is provided.

On the right side of the developing device 10, there is provided a slit-shaped insertion opening 14 for inserting an undeveloped film F. In addition, a discharge port 16 for discharging the developed film F is provided at an upper portion of the development processing device 10.
In the vicinity of the discharge port 16 at the upper part of the main body 12, a tray 18 for receiving the film F discharged from the discharge port 16 to the outside of the main body 12 is formed.

A door (not shown) is provided on the left side (the direction of the arrow L) of the main body 12 of the developing apparatus 10, and the interior can be exposed by opening and closing the door. .

On the right side of the inside of the main body 12 of the developing device 10, an insertion buffer unit 24 for temporarily holding the film F inserted from the insertion port 14 is provided.

The insertion buffer unit 24 includes a transport roller 26,
It is composed of a branch guide 28 and a transport roller 30, which are arranged in order. The transport roller 26 is a motor 32
The transport rollers 30
Is rotated by a motor 34.

The branch guide 28 can be switched by a solenoid 36 between a horizontal state shown by a solid line in FIG. 1 and a vertical state shown by an imaginary line. When the state is switched to the vertical state, the film F can be slackened between the transport roller 26 and the transport roller 30 as shown by the imaginary line in FIG.

The processing speed of the developing device 10 (for example, 30 mm / sec) and the processing speed of the exposure device 11 (for example, 100 mm / sec)
And the speed difference can be absorbed.

Between the insertion port 14 and the transport roller 26,
An insertion sensor 38 for detecting the film F is provided.

Further, the film F
On the downstream side in the conveying direction, water is applied as a photosensitive material carry-in unit 40 and a solvent for image formation, and a water application unit 42 as an application unit is provided. In addition, as an image forming solvent applicable other than water, water and methanol, DMF,
A mixed solvent with a low boiling point solvent such as acetone and diisobutyl ketone may be used. Further, an image formation accelerator, an antifoggant,
A solution containing a development terminator, a hydrophilic heat solvent, a preservative, a fungicide and the like may be used.

The photosensitive material loading section 40 is provided with a plurality of transport rollers 44 for transporting the film F transported from the insertion buffer section 24 to the water application section 42. Further, the photosensitive material loading section 40 is provided with a standby sensor 46 for detecting the film F at an intermediate portion of the film transport path.

The water application section 42 is provided with an application tank 48 and a replenishing tank and a pump (not shown) for replenishing the application tank 48 with water. The application tank 48 is formed in a dish shape, and the inside is filled with water as a solvent for image formation. Further, the coating tank 48 is provided with an arc-shaped guide 49 for immersing the film F in water. By applying water to the film F, the adhesiveness between the film F and the processing sheet 60 can be improved in a heat developing section 66 described later.

Above the coating tank 48, there is arranged a squeeze roller 50 which is composed of rollers 50A and 50B arranged horizontally and which removes excess water adhering to the film F and transports the film F upward. . Roller 50A
Is located on the same horizontal plane, and the squeeze roller 50 can pinch and convey the film F directly above.

A processing sheet unwinding section 52 as a storage section is provided on the left side inside the main body 12 of the developing apparatus 10, and a processing sheet as a collection section is provided above the processing sheet unwinding section 52. A winding unit 54 is provided.

A supply shaft 58 rotated by a motor 56 is detachably attached to the processing sheet unwinding section 52. A long processing sheet 60 is wound around the supply shaft 58 in a roll shape.

On the other hand, a winding shaft 64 that is rotated by a motor 62 is detachably attached to the processing sheet winding section 54.
0 is wound around a winding shaft 64. The supply shaft 58 and the take-up shaft 64 can be removed by opening a door (not shown) provided on the left side surface of the main body 12.

At a substantially central portion of the main body 12 of the developing apparatus 10, a heat developing section 66 as a heating means is provided. As shown in FIGS. 1 and 2A, a plurality of hot plates 68A to 68E are arranged in the heat developing section 66 in an arc shape. In the present embodiment, five hot plates 68A to 68A
E is provided. The shapes of the heat plates 68A to 68E are substantially rectangular as shown in FIG. 2B, and include planar heaters 69A to 69O and a temperature sensor (not shown). The heaters 69A to 69O are connected to the respective heating plates 68A to 68E.
The heaters 69F to 69J provided at the central portions of the heating plates 68A to 68E are respectively provided with three heating plates 68A to 68E.
Heaters 69A-69E, 69K-
It is twice as long as 69O.

The plurality of heaters 69A to 69O built in the heating plates 68A to 68E can be set at different temperatures by the control device 13, so that the temperature difference is set for each region of the heating plates 68A to 68E. Can be created.

In the present embodiment, each of the hot plates 68A
The heaters 69F to 69J provided at the center of the 68E
Is set to 80 ° C. this is,
This is a temperature suitable for subjecting the bonded film F and the processing sheet 60 to heat development processing. On the other hand, the hot plate 68A
Heaters 69A-69 provided at both ends of
E, the temperature of 69K to 69O is set to 90 ° C., which is higher by a predetermined temperature than the temperature of heaters 69F to 69J provided at the center of hot plates 68A to 68E, that is, the temperature suitable for thermal development processing. Has become. Thus, the hot plate 6
The temperatures of the heaters 69A to 69O are set so that a temperature difference of about 10 ° C. occurs between the center and both ends of 8A to 68E.

In the heat developing section 66, the film F is heated by the hot plates 68A to 68E, and the temperature rises to reach a temperature suitable for the developing process.
When the complex forming compound, physical nuclei and silver halide solvent contained in the film F act on the film F, an image is formed on the film F.

A roller 70 is disposed below the hot plate 68A provided at the lowermost part of the heat developing section 66, on the right side of the transport path of the film F indicated by a dashed line. On the side of the hot plate 68E of the heat developing section 66, a hot plate 106 is further arranged along the transport path of the film F.
06, a roller 7 is provided below the transport path of the film F.
2 are arranged. The hot plate 106 is used for heating and drying the film F.

Roller 70, hot plates 68A-68E, hot plate 1
A belt 74 that comes into contact with the back surface of the film F is wound around the roller 06 and the roller 72, and the belt 74 is further wound around rollers 76 and 78. Roller 70,
The reference numerals 72, 76, 78 are connected to each other by a timing belt (or a chain or the like) (not shown), and are rotated by a motor 80.

Below the roller 70, a bonding roller 82 as a superimposing means composed of a roller 82A and a roller 82B is disposed. Roller 82B
The roller 82A can be rotated by a motor 84, and the roller 82A is urged toward the roller 82B by a spring (not shown).

Here, the roller 8 of the bonding roller 82
The rotation center of the 2A, the rotation center of the roller 82B is present in the same horizontal plane, the contact P ₁ between the roller 82A and the roller 82B is directly above the contact point P ₂ between the roller 50A and the roller 50B of the squeeze roller 50 It is located in. As a result, the water-applied film F becomes
Is transported directly above.

The roller 82 of the bonding roller 82
Since the rotation center of the roller A and the rotation center of the roller 82B are on the same horizontal plane, even if the rear end of the film F in the conveyance direction is separated from the squeeze roller 50, the conveyance direction of the film F The latter half is conveyed by the bonding roller 82 while maintaining the vertical state by its own weight. Therefore, the film F coated with water is stuck to the processing sheet 60 from the front end to the rear end while always maintaining a constant angle.

Further, a roller 86 for winding the processing sheet 60 is disposed below the above-mentioned supply shaft 58. The processing sheet 60 sent out from the supply shaft 58 is wound around the roller 86 and then bonded. The sheet is conveyed along the hot plates 68A to 68E via the rollers 82.

As described above, the heating plates 68A to 68E have a heater 69A such that the central portion is at a temperature suitable for the heat development process, and both ends are higher than the central portion by a predetermined temperature.
Since it is heated by に よ っ て 69O, when the bonded film F and the processing sheet 60 are conveyed along the surfaces of the hot plates 68A to 68E, the elongation of both ends of the processing sheet 60 becomes larger than the central part. Therefore, slack in the vicinity of the central portion of the processing sheet 60 is reduced, and wrinkles can be eliminated.

Thus, the film F and the processing sheet 60
Are transported along the surfaces of the hot plates 68A to 68E in a state where they are in close contact with each other, so that a desired image can be formed on the film F.

An urging device 88 is provided at a position facing the hot plates 68A to 68E. Biasing device 88
Are rollers 90A, 90B, 90C and these rollers 9
0A, 90B, 90C and the processing sheet 60
And a belt 90 for urging the heat toward the outer peripheral surfaces of the hot plates 68A to 68E. The rollers 90A, 90B, and 90C are a timing belt (or a chain or the like, not shown).
And rotated by a motor 94.

Above the urging device 88, a processing sheet drying section 96 is provided. The processing sheet drying unit 96 includes hot plates 98A and 98B for heating the processing sheet 60, a fan 100 for blowing the processing sheet 60, and a holding roller 102 for bringing the processing sheet 60 into contact with or close to the hot plates 98A and 98B. Have been.

A film drying unit 104 is provided downstream of the heat developing unit 66 in the transport direction of the film F. The film drying unit 104 includes a hot plate 106 for heating the film F and a fan 108 for blowing the film F.

Further, on the downstream side of the film drying section 104 in the transport direction of the film F, a roller 110 for sandwiching and sending out the film F between the belt 74 wound around the roller 72 is arranged.

The film F conveyed by the belt 74 wound around the roller 72 and the roller 110 is substantially U
It is configured to be discharged from the discharge port 16 to the outside of the main body 12 by the transfer rollers 114 and the transfer rollers 116 via the letter-shaped transfer guide 112.

Next, the operation of the embodiment of the present invention will be described. In the development processing device 10, when the exposed film F discharged from the exposure device 11 is inserted into the insertion slot 14, the film F is detected by the insertion sensor 38, and the conveyance roller is moved at a speed corresponding to the insertion speed of the film F. The film 26 is rotated, and the film F is conveyed to the inside of the developing device 10.

Since the processing speed of the film F in the developing device 10 (after the transport roller 30) is slower than the insertion speed of the film F, when the leading end of the film F is nipped by the transport roller 30, the branch guide 28 becomes an imaginary line. Is switched to the vertical state indicated by. As a result, the rear side in the transport direction of the film F hangs down, for example, as indicated by the imaginary line in FIG.

The film F transported by the transport rollers 30 is transported to the water application section 42 by the transport rollers 44 of the photosensitive material loading section 40. The film F is immersed in the water stored in the application tank 48, and then the excess water is removed by a squeeze roller 50 and transported directly above.

Subsequently, when a predetermined time elapses after the leading edge of the film F is detected by the standby sensor 46, the belt 74, the belt 92, and the processing sheet 60 are transferred to the film F.
The film F coated with water and the processing sheet 60 are bonded together by a bonding roller 82, and then transferred to the heat developing unit 66.

In the heat developing section 66, the bonding roller 82
The film F and the processing sheet 60 that are bonded together are urged toward the hot plates 68A to 68E by the urging device 88, and are conveyed while contacting or approaching the heating surfaces of the hot plates 68A to 68E. At this time, the heating plates 68A to 68E are heated by heaters 69A to 69O provided therein so that a temperature difference is generated in each region of the heating plates 68A to 68E.

In this embodiment, the hot plates 68A to 68A
The central portions of the hot plates 68A to 68E are set to a temperature (80 ° C.) suitable for the thermal development processing by the heaters 69F to 69J provided at the central portion of the hot plate 8E, and both ends of the hot plates 68A to 68E are heated to a temperature higher by a predetermined temperature. (90 ° C.).

As a result, the processing sheet 60 conveyed along the surfaces of the hot plates 68A to 68E has a greater extension at both ends than at the center.
Can be mitigated by relaxing the slack that is likely to occur in the vicinity of the central portion of the substrate. Therefore, the processing sheet 60 and the film F are conveyed along the surfaces of the hot plates 68A to 79E in a state in which the processing sheet 60 and the film F are in close contact with each other, and the heat development processing is performed.

When the film F and the processing sheet 60 that have been subjected to the heat development processing are conveyed to the rear end of the heat development section 66,
The processing sheet 60 is separated from the film F by the roller 90C, is dried in the processing sheet drying unit 96, and is wound around the winding shaft 64.

On the other hand, the film F from which the processing sheet 60 has been separated is dried in the film drying section 104 and then discharged from the discharge port 16 to the tray 18 via the transport guide 112, the transport rollers 114 and the transport rollers 116. .

As described above, in the developing apparatus 10 for performing thermal development using the processing sheet 60, the central portions of the hot plates 68A to 68E provided in the thermal development section 66 are set to a temperature suitable for the thermal development. By setting both ends to a temperature higher than the center by a predetermined temperature, wrinkles are generated in the processing sheet 60 when the bonded film F and the processing sheet 60 are transported along the surfaces of the hot plates 68A to 68E. Therefore, the film is transported in a state of being in close contact, and the heat development is performed, so that a desired image can be formed on the film F.

In the present embodiment, the thermal developing section 66 is provided with five hot plates 68A to 68E, and three heaters 69A to 69O are provided inside the hot plates 68A to 68E, respectively. Has been described, but the present invention is not limited to this.

For example, as shown in FIG. 3, the heating plate may be divided into regions and each of the heating plates 68A to 68O may be provided with one heater. Also in this case, as described above, the temperatures of the heaters 69F to 69J provided in the hot plates 68F to 68J corresponding to the central portion are set to temperatures suitable for the heat development processing, and the hot plates 68A to 68E corresponding to both ends are provided. 68K ~
Heaters 69A to 69E, 69K to 6 provided in 680
9O is set to a temperature higher than the temperature of the heaters 69F to 69J at the center by a predetermined temperature, and the film F and the processing sheet 60 are heated in a state where a predetermined temperature difference occurs between the center and both ends of the hot plates 68A to 68E. You may make it.

The hot plates 68A to 68E of the heat developing section 66
In this embodiment, the temperature setting (temperature distribution) of the heaters 69A to 69O provided in the heaters 69A to 69O provided in the central portions of the heating plates 68A to 68E as shown in FIG. Temperature is 80 ° C, hot plate 68A-6
Heaters 69A to 69E, 69 provided at both ends of 8E
The temperature of K to 69O was set to 90 ° C., and a stepwise temperature difference was set between the center and both ends, but the present invention is not limited to this setting method.

For example, as shown in FIG. 4B, the temperature may be set so that a continuous temperature difference is generated from both ends of the hot plates 68A to 68E to the center. However, also in this case, it is preferable that the temperature at the center of the hot plates 68A to 68E be a temperature suitable for the heat development processing.

Further, in the present embodiment, the hot plates 68A to 68A
Although a predetermined temperature difference is generated between the center and both ends of 8E, the center and both ends of the hot plates 68A to 68E may correspond to the image forming area of the film F and the outside of the image forming area. Good. That is, a region where an image is to be formed is predetermined on the film F, and a desired image is formed on the film F when the processing sheet 60 comes into close contact with the image forming region. Therefore, the hot plates 68A-68
The central portion of E corresponds to the image forming area of the film F, and both ends of the hot plates 68A to 68E are heated so as to correspond to the outside of the image forming area of the film F. Are in close contact with each other, so that a desired image can be formed.

Further, in the present embodiment, the structure in which water as an image forming solvent is applied to the film F has been described, but the present invention is not limited to this. For example, it may be applied to the processing sheet 60, or may be applied to both the film F and the processing sheet 60.

[0065]

As described above, in the developing apparatus of the present invention, the central portion of the hot plate is suitable for the thermal developing process in the thermal developing section for thermally developing the bonded silver halide photosensitive material and the processing sheet. By setting both ends of the hot plate to a predetermined temperature higher than the temperature of the central part (the temperature suitable for thermal development) by a predetermined temperature and heating, the slack that tends to occur near the central part of the processing sheet is reduced. Since the film can be transported in a state where the wrinkles are alleviated and wrinkles are removed, and the heat development can be performed, an excellent effect that a desired image can be formed on the silver halide photosensitive material can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a development processing apparatus applied to an embodiment of the present invention.

FIG. 2 is a schematic view showing a heat developing unit in a developing apparatus applied to the embodiment of the present invention. FIG. 2A is a schematic side view schematically showing a heat developing section, and FIG. 2B is a front view showing a state where a plurality of hot plates provided in the heat developing section are developed.

FIG. 3 is a schematic front view showing a hot plate of a heat developing unit as another embodiment.

FIG. 4 is a graph showing a temperature distribution of a hot plate in a heat developing section. (A) is a graph in the case where the temperature is set so that a stepwise temperature difference occurs between the center portion and both end portions of the hot plate,
(B) is a graph in the case where the temperature is set so that a continuous temperature difference occurs between the center portion and both end portions of the hot plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Development processing apparatus 13 Control apparatus (heating control means) 42 Water application part (application means) 60 Processing sheet 66 Thermal development part 68A-68E Hot plate (heating means) 82 Lamination roller (lamination means) 90A, 90B Roller ( Conveying unit) 90C Roller (separating unit, conveying unit) 96 Processing sheet drying unit (drying unit) 104 Film drying unit (drying unit) 112 Conveying guide (discharging unit) 114, 116 Conveying roller (discharging unit) F Film (halogenated) Silver photosensitive material)

Claims (2)

[Claims] 1. A silver halide light-sensitive material having an image exposed thereto, and a processing sheet containing an agent for forming an image on the silver halide light-sensitive material by being bonded to the silver halide light-sensitive material and heated. A developing apparatus for forming an image on the silver halide photosensitive material by applying an image forming solvent to at least one of the silver halide photosensitive material or the processing sheet to which the image has been exposed; A bonding means for bonding the silver halide photosensitive material and the processing sheet; and a plurality of hot plates arranged in an arc shape, and the silver halide photosensitive material and the processing sheet bonded by the bonding means are heated. Heating means for heating for development processing; separating means for separating the silver halide photosensitive material heated by the heating means from the processing sheet; Conveying means for conveying the silver halide light-sensitive material and the processing sheet bonded by the bonding means along the surface of the heating means; and drying each of the silver halide light-sensitive material and the processing sheet separated by the separating means. A drying unit, an ejection unit on which an image is formed by the heating unit, and an ejection unit for ejecting the silver halide photosensitive material separated by the separation unit to the outside of the apparatus; and a central part of a hot plate of the heating unit is suitable for development processing. And a heating control means for setting the temperature so that both ends thereof are higher by a predetermined temperature than a temperature suitable for the developing process. 2. The heating means sets a central portion corresponding to an image forming region of the silver halide photosensitive material to a temperature suitable for the developing process, and sets both ends corresponding to portions outside the image forming region to a predetermined temperature higher than the temperature suitable for the developing process. 2. The development processing apparatus according to claim 1, wherein the heat development is performed by setting the temperature to a high temperature and performing the heat development processing.