JP2938691B2 - Thermal development processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a heat roller whose peripheral surface is heated to a predetermined temperature by a heat source, and closely contacts a heat-developable photosensitive material on which a latent image is formed to a part of the peripheral surface of the heat roller. The present invention relates to a heat development processing apparatus that forms a visible image by heating and developing by conveying while performing the heating.

[0002]

2. Description of the Related Art A heat roller is generally used as a means for heat-treating a heat-developable photosensitive material. That is, the heat-developable photosensitive material on which the latent image is formed is brought into close contact with a heat roller whose peripheral surface is heated to a predetermined temperature over a predetermined length along the peripheral surface, thereby heating the heat-developable photosensitive material. To visualize the image.

[0003] As this heat-developable photosensitive material, for example,
Two-component type thermosensitive coloring medium in which two components are separated and arranged via microcapsules containing a photocurable composition (see JP-A-52-89915), a vinyl monomer having an acidic group and a photopolymerizable composition Layer comprising a layer containing a substance, an isolating layer, and a layer comprising a colorless electron-donating dye (see JP-A-61-123838). Those having a center wavelength (JP-A 1-222430, JP-A 2
And the like provided on the surface of a substrate (base).

The heat roller is in direct contact with and heats the heat-developable photosensitive material, so that it has better heat efficiency than other heating means (hot air, infrared heater, etc.) and has the effect of shortening the processing time. The device is also compact.

In such a heat development processing apparatus, a plurality of backup rollers are arranged in opposition to the peripheral surface of the heat roller in order to bring the heat development type photosensitive material into close contact with the heat roller over a predetermined length. Tension is applied to the photothermographic material between the backup rollers to bring the photothermographic material into close contact with the heat roller. However, in order to bring the heat-developable photosensitive material (particularly, the front end and rear end) into close contact with the peripheral surface of the heat roller over a predetermined length, a guide plate (surface) is provided between backup rollers or the like so as to face the peripheral surface of the heat roller. Is effective.

However, since such a guide plate is fixed to the apparatus, it comes into sliding contact with the emulsion surface of the heat-developable photosensitive material conveyed in close contact with the heat roller. When the surface of the emulsion is smoothed due to fear of damage to the emulsion surface,
As a result of the experiment, it was found that the heat-developable photosensitive material sometimes stuck to the guide plate (paper-passing property deteriorated). Especially,
The generation of water vapor as described above promotes sticking.

[0007] This sticking prevents the heat-developable photosensitive material from being smoothly conveyed with the rotation of the heat roller, and the amount of heat received from the heat roller becomes non-uniform in each part of the image, which may cause uneven development. .

On the other hand, if the contact surface of the guide plate is roughened in order to prevent sticking to the heat-developable photosensitive material, streaks or scratches are formed on the image, resulting in deterioration of the finished image.

In view of the above facts, the present invention provides a heat development process capable of preventing uneven development and damage to an image surface while maintaining the close contact between the heat development type photosensitive material and the heat roller during heat development. The purpose is to get the device.

[0010]

According to the first aspect of the present invention,
A heat development processing apparatus for forming a visible image by heating and developing a heat development type photosensitive material on which a latent image is formed, in close contact with a part of the peripheral surface of a heat roller heated to a predetermined temperature. Te, has a surface member Ru are brought into close contact with the heat-developable light-sensitive material to the heat roller as well as guiding the tip of the heat-developable light-sensitive material to the peripheral surface of the heat roller, and the heat-developable light-sensitive material of the surface member Is the average according to JIS standard
It is characterized by a micro-rough surface with a roughness Ra (μm) of 0.5 to 5 .

[0011]

According to a second aspect of the present invention, a heat-developable photosensitive material having a latent image formed thereon is brought into close contact with a part of the peripheral surface of a heat roller heated to a predetermined temperature, thereby carrying out heat development. A heat development processing device for forming a visible image
Has a surface member and the heat-developable light-sensitive material Ru is adhered to the heat roller as well as guiding the tip of the heat-developable light-sensitive material to the peripheral surface of the heat roller, contact between the heat-developable light-sensitive material of the surface member Surface is non-hydrophilic and average roughness according to JIS standard
It is characterized by having a micro-rough surface with a Ra (μm) of 0.5 to 5 .

[0013]

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the fine rough surface of the surface member is formed of a woven fabric having a warp and a weft each having a length of 15 yarns / cm or more. It is characterized by having been done.

[0015]

According to the first aspect of the present invention, the contact surface with the heat-developable photosensitive material is made to be a micro-rough surface, so that sticking or repeated sticking and peeling (stick-slip) does not occur. And the occurrence of scratches and uneven development can be prevented. In particular, the micro-rough surface has an average roughness Ra according to JIS standards.
(Μm) Because of 0.5 to 5, thermal development of surface member
The contact surface with the mold photosensitive material,
Prevent life. Such a micro-rough surface can be formed on a PET base or the like.
Using sandpaper on the surface of the plastic film
It is possible by making it rough.

[0016]

According to the invention described in claim 2 , according to claim 1
Having the described function , the surface member is non-hydrophilic.
Therefore, the paper-passing property of the heat-developable photosensitive material improves. This non-hydrophilic
To ensure the performance, apply a Teflon coating.
Is preferred.

[0018]

According to the third aspect of the present invention, the micro-rough surface is made of a woven fabric, and the woven fabric has a warp and a weft woven at a density of 15 yarns / cm or more, respectively. The generation of scratches on the emulsion surface of the photosensitive material can be prevented.

[0020]

FIG. 1 shows an embodiment of a heat developing apparatus 10 of a plate inspection apparatus to which the present invention is applied.

[0021] The plate inspection apparatus is composed of Y plate, M plate, C plate and B plate.
Before using the original film separated into K (Sumi) plate for actual printing, to inspect the original film layout for errors, colors, characters, etc. In this apparatus, each original film is positioned one by one, sequentially superposed on an ultraviolet light-sensitive material and subjected to multiple close contact exposures, and then heat-developed by a heat developing device 10 to produce a color proof.

As shown in FIG. 1, the thermal developing device 10 comprises:
The pair of legs 12 is placed on a support table 14 that extends between the upper ends of the legs 12. The heat developing device 10 includes a casing 16
An insertion base 18 is attached to the side surface on which the photosensitive material insertion hole 10A is provided. The exposed photosensitive material 20 (see FIG. 2) is inserted into the insertion table 18.
And sent to the thermal developing device 10.

A tray 22 is mounted between the pair of legs 12. The tray 22 is constituted by a plurality of parallel bar-shaped frames 22A. The frame 22A is extended downward, and the extended end is bent in a substantially U-shape.

A support bar 22B is attached to the intermediate position in the axial direction and the bent end position of the frame 22A, and the frame 22A is supported on the inner surface of the leg 12 via the support bar 22B. For this reason, the photosensitive material 20 discharged from the photosensitive material discharge hole 10B (see FIG. 2) provided at the lower part of the thermal developing device 10 is guided by the frame 22A, and is positioned below (in front of) the photosensitive material insertion hole 10A. It will be housed around.

As shown in FIG. 2, a guide plate 26 for guiding the photosensitive material 20 between the photosensitive material insertion hole 10A and the internal heat roller 24 is mounted on the downstream side of the insertion table 18. For this reason, when the operator pushes the photosensitive material 20 with the emulsion surface placed on the insertion table 18 facing upward, the leading end of the photosensitive material 20 is surely placed on the heat roller 2.
4 is guided to the peripheral surface. Further, a static elimination brush 27 is attached to an upstream end of the guide plate 26 in the photosensitive material transport direction. The charge removing brush 27 has a function of removing static electricity charged on the photosensitive material 20 by contacting the tip of the photosensitive material 20 to be inserted. The heat roller 24 has a cylindrical shape made of aluminum, and its peripheral surface is anodized. This heat roller is not supported by the casing 16.

A halogen lamp 28 as a heat source is attached to the axis of the heat roller 24, and the peripheral surface of the heat roller 24 is heated by the heat of the halogen lamp 28. The thermistor 30 is in contact with a part of the peripheral surface of the heat roller 24 so that the temperature of the peripheral surface of the heat roller 24 can be detected. Therefore, by controlling the turning on and off of the halogen lamp 28 by feeding back the temperature detected by the thermistor 30, the temperature of the peripheral surface can be maintained at a predetermined temperature. In this embodiment, the temperature of the peripheral surface of the heat roller 24 is 125
The temperature is controlled in the range of 130C to 130C.

At a plurality of locations (three locations in this embodiment) on the peripheral surface of the heat roller 24, backup rollers 32 are supported by the casing 16. The backup rollers 32 are arranged at substantially equal intervals around the periphery of the heat roller 24 so as to contact the peripheral surface of the heat roller 24 and rotatably support the same (substantially based on the axis of the heat roller 24). (Disposed every 120 °).

The backup roller 32 is made by covering the outer periphery of an aluminum pipe with foamed silicon.

The backup roller 32 has a role of supporting the heat roller 24 and applying a rotational driving force.

As shown in FIG. 3 and FIG. 4, the rotational drive shafts of the backup rollers 32 are fixed to the collars 33 at both ends in the axial direction of the backup rollers 32, respectively.
Is installed. First backup roller 3 for receiving photosensitive material 20 inserted from photosensitive material insertion opening 10A
The second collar 33 has a height substantially equal to the thickness of the photosensitive material 20 from the roller surface, but the outer peripheral surface of the collar 33 of the other two backup rollers 32 is an extension of the roller surface. These collars 33 are attached to the heat roller 24.
Are in contact with each other. A sprocket 35 is attached to one end of each backup roller 32 in the axial direction (see FIG. 2), and an endless chain 34 is wound around the sprocket 35. The endless chain 34 is also wound around an idle pulley 36 and a sprocket 38B attached to a drive shaft 38A of a motor 38.

For this reason, when the motor 38 is driven, each backup roller 32 rotates counterclockwise, and the rotation of the backup roller 32 causes the heat roller 2 to rotate.
4 rotates clockwise in FIG. In addition, photosensitive material 2
The transport speed of 0 is 10 to 100 mm / sec.

The photosensitive material 20 guided and pushed by the guide plate 26 is supplied to a backup roller 32 disposed above the heat roller 24 and near the guide plate 26.
(Hereinafter, referred to as a first roller 32A), and a space surrounded by a collar 33 at both ends thereof and a peripheral surface of the heat roller 24. When driven to rotate, the heat roller 24 and the first roller 32A are used. Conveyed, the first roller 3
A backup roller 32 (hereinafter referred to as a second roller 32B) disposed at a position 120 ° clockwise with respect to 2A.
) Is pressed against the peripheral surface of the heat roller 24 by the guide plate 44, is wound around the peripheral surface of the heat roller 24, and is conveyed. The second roller 32B is connected to a backup roller 32 (hereinafter, referred to as a third roller 3) which is in contact with a lower portion of the heat roller 24.
2C) along with the heat roller 24 in the longitudinal direction along the axial direction, and the second roller 32B
Then, the photosensitive material 20 is reliably nipped with the heat roller 24. First roller 32A, second roller 32B
And heat roller 2 by contact with third roller 32C.
4 is reliably transmitted.

A turn guide section 40 is provided above the heat roller 24 at a position where the photosensitive material 20 starts to contact. The turn guide section 40 is formed by a pair of L
It comprises a mold bracket 42 and a guide plate 44 bridged between the L-shaped brackets 42. The guide plate 44 is biased by itself or by the elastic force of the L-shaped bracket 42 so as to come into contact with the peripheral surface of the heat roller 24, whereby the photosensitive material 20 is pressed against the heat roller 24 from the tip thereof, and The roller 24 is conveyed in a state of being in close contact with the peripheral surface thereof. Therefore, the photosensitive material 20 is sufficiently heated on the downstream side of the turn guide section 40, and thermal development is promoted.

Here, since the guide plate 44 is in direct contact with the emulsion surface (soft photosensitive layer having high hydrophilicity) of the photosensitive material 20, if the material is non-hydrophilic, the photosensitive material 2
There is no sticking or stick-slip of 0 (a phenomenon in which sticking and peeling are repeated), and smooth conveyance becomes possible. In addition, by selecting a material having a surface with an appropriate roughness, the emulsion surface is not damaged.

As the guide plate 44 of this embodiment, a fine fiber, for example, a glass fabric or the like coated with Teflon, is adhered to a flexible support. In this Teflon coated glass fabric,
The surface has periodic irregularities, and is non-hydrophilic due to Teflon coating, so that the paper-passing properties of the photosensitive material 20 are improved and the fine fibers are used to prevent scratches on the emulsion surface. .

The guide plate 44 may be made of another material such as PET (polyethylene terephthalate) having an average roughness Ra according to the JIS standard.
(Μm) 0.5 to 5 (preferably 1.0 to 4.0)
150 or # 400 sandpaper coarse,
It was found that aramid fiber felt, aramid fiber woven fabric and the like can be adopted.

Here, the applicable range of the PET surface roughness was determined for the following reasons.

For raw PET, Ra = 0.06 μm or less. Therefore, when the surface is roughened using sandpapers of # 100, # 150, and # 400, # 100 is Ra = 5.17 μm , and # 150 is Ra = 3.28 μm.
m and # 400 were Ra = 1.34 μm . When the paper passing property and the appearance of the scratches were observed using these guide plates 44, the P coarsened with sandpaper # 150 and # 400 was used.
It turns out that ET is applicable. From these, JI
It is conceivable that an average roughness Ra (μm) according to the S standard of 0.5 to 5 (preferably 1.0 to 4.0) roughened with # 150 or # 400 sandpaper can be employed.

When a woven fabric is applied to the guide plate 44 of this embodiment, not only the material of the fiber but also many other requirements such as the thickness of the fiber, the thickness of the yarn, the weaving method, and the density of the yarn are required. However, a woven fabric having warp yarns and weft yarns of 15 yarns / cm or more can be applied.

As shown in FIGS. 3 and 4, in the first roller 32A, the diameter of the roller between the collars 33, that is, the diameter of the roller facing the photosensitive material 20 is smaller than that of the collar 33, and the gap between the first roller 32A and the peripheral surface of the heat roller 24 is small. A gap 37 is formed between them. The gap size of the gap 37 is designed to be substantially equal to or slightly larger than the thickness of the photosensitive material 20 to be applied. In this embodiment, the thickness of the support is 135 μm,
The thickness of the emulsion layer is 25 to 35 μm (160 to 17 in total).
0 μm), and the gap size is about 0.17 to 0.18 mm. That is, the gap 37 causes the first roller 32A and the heat roller 2
4, no holding force is applied to the photosensitive material 20 entering between them.

During the heat development, the moisture contained in the photosensitive material 20 evaporates and is released as water vapor. Since the water vapor is generated between the heat roller 24 and the photosensitive material 20, the pressure of the water vapor causes the photosensitive material 2
Floating at 0 (separation from the heat roller 24) may occur. However, in this embodiment, the first roller 32
The space between A and the heat roller 24 is not pinched by the collar, and the steam is discharged from the non-pinched portion to prevent the photosensitive material 20 from floating due to the pressure.

As shown in FIG. 2, the second roller 32B
Are located almost right beside the heat roller 24, and their tangents are within a range of ± 30 ° with respect to the substantially perpendicular.

Accordingly, the photosensitive material 20 conveyed while being nipped and held by the second roller 32 and the heat roller 24.
Is separated from the heat roller 24 or the second roller 32B by its own weight on the downstream side of the second roller 32B, and is sent in a hanging direction (the direction of its own weight) by the rotation of the heat roller 24. On the downstream side of the second roller 32B, guide portions 46 and 48 are provided corresponding to the front and back surfaces of the photosensitive material 20, respectively. The guide portion 46 on the emulsion side of the photosensitive material 20, that is, the guide portion 46 on the right side in FIG.
It is arranged close to 2B. Also, this guide part 4
6 extends in the direction of the photosensitive material discharging hole 10B.

On the other hand, the guide portion 48 on the left side in FIG. 2 has its upper end gradually thinned, and its tip is in contact with the peripheral surface of the heat roller 24 to serve as a scraper (hereinafter referred to as a scraper). This tip is referred to as a scraper portion 48A). Generally, the curl of the photosensitive material 20 due to thermal development and the curl due to the winding around the heat roller 24 cancel each other, and the photosensitive material 20 separates from the heat roller 24 and the second roller 32B while maintaining the flatness. (In the tangential direction passing through the contact point between the heat roller 24 and the second roller 32B), if the adhesive force to the heat roller 24 is strong,
Even after passing through the second roller 32 </ b> B, the sheet may be conveyed in a state of being in close contact with the heat roller 24. In such a case, the heat roller 24 and the tip of the photosensitive material 20 are separated by the scraper portion 48A at the tip of the guide portion 48.
The photosensitive material is reliably sent to the photosensitive material discharge hole 10B.

As described above, the photosensitive material 20 passing between the guide plates 46 and 48 is approximately ± 30 with respect to the hanging direction.
°, the guide material 46 hardly contacts the guide plates 46 and 48, and the photosensitive material 20 reaches the photosensitive material discharge hole 10B without being rapidly cooled. Further, the photosensitive material 20 is not moved until the photosensitive material discharge hole 10B is reached.
Is gradually cooled, and the development is stable at the time when it is discharged from the photosensitive material discharge hole 10B.

The heat-developed photosensitive material 20 is discharged from the photosensitive material discharge hole 10B and stored in a tray 22 provided below the photosensitive material discharge hole 10B.

The operation of this embodiment will be described below. When the exposed photosensitive material 20 is placed on the insertion table 18 by the operator and inserted through the photosensitive material insertion hole 10A, the photosensitive material 20 is guided by the guide plate 26, and is positioned above the axis on the peripheral surface of the heat roller 24. Contact. Since the first roller 32A is disposed at this position, the photosensitive material 20 is inserted between the first roller 32A and the heat roller 24. At this time, the heat roller 24 and the first roller 3
2A, a slight gap is provided (gap 3
7) Since the gap 37 has a value corresponding to the thickness of the photosensitive material 20, there is no pinching force, but a conveying force is applied to the photosensitive material 20. For this reason, the front end of the photosensitive material 20 is guided by the guide plate 44 and is brought into close contact with the peripheral surface of the heat roller 24, and is conveyed while being in close contact with the heat roller 24 over approximately one third of its upper periphery by the rotation of the heat roller 24. .

The light-sensitive material 20 includes a turn guide 40
Is pressed against the heat roller 24 by the guide plate 44, and further pressed against the heat roller 24 by the second roller 32B, so that the heat from the heat roller 24 is reliably transmitted to the photosensitive material 20 and is thermally developed. You.

Here, since the photosensitive material 20 contains a certain amount of water, the water evaporates during thermal development and becomes steam, which is released between the heat roller 24 and the photosensitive material 20. Conventionally, due to the release of the water vapor, the pressure between the photosensitive material 20 and the heat roller 24 increases, and the photosensitive material 20 floats from the heat roller 24 against the pressing force of the guide plate 44, causing unevenness in thermal development. Sometimes occurred. However, in this embodiment, the heat roller 24 and the first
Since a gap 37 is provided between the first roller 32A and the second roller 32A and no pinching force is applied, water vapor can escape through this gap 37. Accordingly, the pressure between the photosensitive material 20 and the heat roller 24 does not increase, and the photosensitive material 20 can be reliably brought into contact with the peripheral surface of the heat roller 24 and conveyed.

Guide plate 44 of turn guide section 40
Is in direct contact with the emulsion surface of the photosensitive material 20 wound around the heat roller 24, so that at least the contact surface is made non-hydrophilic so that sticking of the photosensitive material 20 is eliminated and the emulsion surface is further damaged. It is preferable to select a material having a moderately rough surface without any problem.

As the guide plate 44 of this embodiment, a material in which glass fabric or the like is coated with Teflon and adhered to a flexible support is employed. Therefore, the emulsion surface is also prevented from being damaged.

Table 1 shows, in addition to the material obtained by coating the glass fabric with Teflon (referred to as material A in Table 1),
As a material applicable as the guide plate 44, PE
T (determination of applicability of each of polyethylene terephthalate whose surface is roughened with # 400 sandpaper (referred to as material B in Table 1), aramid fiber felt (material C), and aramid fiber fabric (material D); 9 shows the results of determining PET (material E) applied as a conventional guide plate.

[0053]

[Table 1]

[Materials] Material A; Teflon-coated glass fabric (applied in the present embodiment, two denier 150 yarns, and both warp and weft are plain woven at 15 / cm), Material B A PET base roughened with # 400 sandpaper, material C: aramid fiber felt, material D; aramid fiber woven fabric (a yarn made of 500 2-denier filaments (fibers) was plain woven at a density of 12.8 warps / cm. ), Material E; PET base (conventional), [Evaluation legend] ◎: Very good, ○: Good, △; Normal (no problem), ×: Slightly problematic, XX; Not applicable, see Table 1. As can be seen, the materials A to C have no sticking of the photosensitive material 20 and scarcely damage the emulsion surface. For the material D, the photosensitive material 2
Although there is no problem with sticking of 0, there is a problem in other applicability (stick slip, emulsion surface roughness). Also,
With respect to the material E, the surface of the emulsion was flat, and there was no unevenness in the emulsion surface. However, it was found that the material E was inferior in other applicability.

The photosensitive material 2 that has passed through the turn guide section 40
0 is a position where the sheet has passed through the second roller 32B, and the conveyance direction is the hanging direction. The photosensitive material 20 between the heat roller 24 and the second roller 32B is curled by heat (curl with the emulsion surface on the inside) and curled by the heat roller 24 (curl with the emulsion surface on the outside). ) Is canceled out, and the flatness is maintained.
Usually, it is transported as it is in the hanging direction. On the other hand, when the adhesive force to the heat roller 24 is strong, the second roller 32B
May be maintained around the heat roller 24. In such a case, the photosensitive material 20 is peeled off by the scraper portion 48A of the guide plate 48.
48 and reaches the photosensitive material discharge hole 10B.

The photosensitive material 20 between the guide plates 46 and 48 is
Since it has just been separated from the heat roller 24, the temperature is relatively high. For this reason, when it comes into contact with the surrounding relatively low-temperature member, it is rapidly cooled, and the support of the photosensitive material 20 may contract unevenly or may cause uneven development. However, in the present embodiment, the photosensitive material 20 that has passed between the second roller 32B and the heat roller 24 is separated from the heat roller 24 by its own weight, and the subsequent transport direction is substantially vertical. Even if there is contact with
The contact area is a short time or a small area.
Does not cool rapidly. Therefore, the guide plate 46,
The photosensitive material 20 is gradually cooled during the passage between 48 and
Non-uniform shrinkage of the support and uneven development can be prevented.

The photosensitive material 20 that has passed through the photosensitive material discharge hole 10B is discharged to the tray 22, but since the photosensitive material 20 has already been cooled, it is supported by contact with the tray 22. No uneven shrinkage and uneven development of the body.

Although the heat roller 24 of this embodiment has a flat peripheral surface, a circumferential groove 50 may be formed on the peripheral surface of the heat roller 24 as shown in FIG. Good. That is, by providing the groove 50 shown in FIG. 5, the peripheral surface is intentionally roughened. This groove 5
0 may be a plurality of grooves parallel to each other along the axial direction of the heat roller 24, or may be formed spirally from one end to the other end in the axial direction.

By forming the uneven portion 50, the photosensitive material 20 is supported by the protruding end of the groove 50 when the photosensitive material 20 comes into contact with the peripheral surface of the heat roller 24.

Thus, the water vapor generated from the photosensitive material 20 can be efficiently discharged from the gap (gap 37) between the first roller 32A and the heat roller 24.

In this embodiment, the guide plate 44
The glass fiber woven fabric coated with Teflon was used as the material, but the materials B to D shown in Table 1 are also applicable. In this case, when periodic irregularities such as a woven fabric are formed, the pitch must be 3 mm or less. Table 1
In addition to the above materials, non-periodic graining may be performed. Further, the flat guide plate 44 may be embossed to form a fine uneven surface.

[0062]

As described above, the heat development processing apparatus according to the present invention prevents uneven development and damage to the image surface while maintaining the close contact between the heat development type photosensitive material and the heat roller during the heat development. It has an excellent effect that it can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a heat developing apparatus according to the present embodiment.

FIG. 2 is a side view showing the internal structure of the heat developing device.

FIG. 3 is a perspective view showing an arrangement state of a heat roller and a backup roller.

FIG. 4 is an enlarged view around a heat roller and a backup roller.

FIG. 5 is a perspective view of a single heat roller having a groove formed on a peripheral surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Thermal developing device 20 Photosensitive material 24 Heat roller 32 Backup roller 40 Turn guide part 44 Guide plate

Claims (3)

(57) [Claims] 1. A heat-developable photosensitive material on which a latent image is formed is brought into close contact with a part of the peripheral surface of a heat roller heated to a predetermined temperature, and is conveyed to form a visible image by heat development. a developing apparatus, comprising a surface member which Ru is adhered to the heat-developable light-sensitive material to the heat roller as well as guiding the tip of the heat-developable light-sensitive material to the peripheral surface of the heat roller,
The contact surface of the surface member with the photothermographic material is JIS
A heat development processing apparatus characterized by having a micro-rough surface having an average roughness Ra (μm) of 0.5 to 5 according to a standard . 2. A heat-developable photosensitive material on which a latent image is formed is brought into close contact with a part of the peripheral surface of a heat roller heated to a predetermined temperature, and is conveyed to form a visible image by heat development. a developing apparatus, comprising a surface member which Ru is adhered to the heat-developable light-sensitive material to the heat roller as well as guiding the tip of the heat-developable light-sensitive material to the peripheral surface of the heat roller,
The contact surface of the surface member with the photothermographic material is non-hydrophilic and has an average roughness Ra (μm) of 0.5 to JIS standard.
5. A heat development processing apparatus characterized in that the heat development processing apparatus has a fine rough surface. 3. A heat developing apparatus according to claim 1 or 2, wherein the minute rough surface of the surface member, characterized in that the warp and weft are formed by fifteen / cm or more fabrics, respectively.