JPS61196244A - Heating device for heat development photosensitive material - Google Patents

Abstract

PURPOSE:To develop a heat development photosensitive material without any unevenness and to transfer an image of the heat development photosensitive material to transfer paper without any unevenness by providing an infrared heating device and a moving means which sends the heat development photosensitive material in the infrared heating device and sends it out of heating device. CONSTITUTION:The heat development photosensitive material 12 is conveyed as shown by an arrow and sent in betweeen ceramic plates 32 and 34. Then a current is flowed to heaters 36 and 40 to perform temperature control so that the surfaces of the ceramic plates 32 and 34 are at constant temperature. Simultaneously, fans 52 and 54 are rotated. Consequently, external air is blown in between the ceramic plates 32 and 34 as shown by the arrow A. Therefore, the air temperature between the ceramic plates 32 and 34 becomes uniform. Further, infrared rays radiated from the surfaces of the ceramic plates 32 and 34 are absorbed directly by the photosensitive material 12. The radiant energy density of the infrared rays between the ceramic plates 32 and 34 is constant, so the front surface of the photosensitive material 12 is heated uniformly, so that no irregularity of development is caused.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-developable photosensitive material heating device used for heat-developing or heat-transferring a heat-developable photosensitive material.

[Conventional technology]

Conventionally, thermal development apparatuses for heat-developable photosensitive materials include devices in which the photothermographic material is brought into contact with a hot plate equipped with a heater for thermal development, or devices in which an electrically conductive heating layer is provided on the back side of the photothermographic material. , an apparatus is known that performs heating and development by passing an electric current through this current-carrying heat generating layer. However, in the former device, it is difficult to maintain the temperature of the entire hot plate uniformly, and development is not performed uniformly due to temperature unevenness of the hot plate, and in the latter device, the current-carrying heating layer is The coating is not necessarily uniform, so the resistivity is not uniform, and the heating temperature distribution is not uniform, resulting in uneven development. Additionally, during heat development, warm air rises from the upper center of the photothermographic material, so cold air flows around the photothermographic material, making the temperature distribution of the photothermographic material uneven, resulting in uneven development. It turns out.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat-developable photosensitive material heating device that uniformly heats a photothermographic material and does not cause uneven development.

[Means for solving problems]

The heat-developable photosensitive material heating device according to the present invention includes an infrared heating device provided with an infrared radiation surface facing the heat-developable photosensitive material, and a movement for feeding the heat-developable photosensitive material into the infrared heating device and sending it out from the infrared heating device. I have the means and the.

[Effect]

A heat-developable photosensitive material or a polymerized product of a heat-developable photosensitive material and a transfer paper is inserted into an infrared heating device using a moving means. Infrared rays are uniformly radiated from the infrared ray emitting surface to the heat-developable photosensitive material. As a result, the photothermographic material is thermally developed or the image on the photothermographic material is thermally transferred to the transfer paper.

〔Example〕

Embodiments of a photothermographic material heating apparatus according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, ceramic plates 32 and 34, which are slightly wider than the area of the photothermographic material 12, are arranged in parallel at a constant interval. These ceramic plates 32 and 34
A material with high infrared emissivity is used. The upper surface of the ceramic plate 32 is covered with a heat insulating material 38 via a heater 36. Further, the lower surface of the ceramic plate 34 is connected to a heater 40.
It is covered with a heat insulating material 42 via. This heater 3
6 is arranged so as to uniformly heat the surface of the ceramic plate 32, and the heater 40 is arranged so as to uniformly heat the surface of the ceramic plate 34.

Drive rollers 44 and 46 are arranged between the ceramic plates 32 and 34 at a constant interval. The drive roller 44 and the drive roller 46 are connected to other drive rollers (not shown) by a chain, and are rotated by a motor (not shown). A press roller 48 is pressed against the II moving roller 44, and a press roller 50 is pressed against the drive roller 46. The drive roller 44 and the press roller 48 and the drive roller 46 and the press roller 50 are capable of conveying the photothermographic material 12 while holding its side end surfaces.

Fans 52 and 54 are disposed at the entrance of the photothermographic material 30 to blow outside air between the ceramic plates 32 and 34 in the direction of arrow A.

A temperature detector 56 such as a resistance thermometer is fixed to the surface of the ceramic plate 34, and its detection signal is sent to the temperature controller 5.
8 is input. In this temperature controller 5, the control circuit 60 controls the current value flowing to the heater 36, 40 based on the feedback from the temperature detector 56 (error signal from the i number and the set value. Control The circuit 60 also rotates fans 52, 54, which are air blowing devices, during heat development.

Next, the operation of the first embodiment configured as described above will be explained.

The heat-developable photosensitive material 12 is held between rollers (not shown) and
direction and fed between the ceramic plates 32 and 34. As a result, as shown in FIG. 1, the leading end of the photothermographic material 12 is held between the drive roller 46 and the press roller 50, and the rear end of the photothermographic material 12 is held between the drive roller 44 and the press roller 48. The rotation of the drive rollers 44 and 46 is then stopped.

Next, current is applied to the heaters 36 and 40 to control the temperature so that the surfaces of the ceramic plates 32 and 34 are at a constant temperature. At the same time, the fans 52 and 54 are rotated.

As a result, outside air is blown between the ceramic plates 32 and 34 in the direction of arrow A. Therefore, ceramic plates 32 and 3
Also, the air temperature between the ceramic plate 3 and the ceramic plate 3 becomes uniform.
The infrared rays emitted from the surfaces 2 and 34 are the heat-developable photosensitive material 12.
It is absorbed by sheet welding. The entire surface of the ceramic plates 32 and 34 is at a constant temperature, and the ceramic plates 32 and 34 have a constant temperature.
Since ceramic plates 2 and 34 are arranged in parallel, the radiant energy density of infrared rays existing between ceramic plates 32 and 34 is constant.

Therefore, the front surface of the photothermographic material 12 is heated uniformly, and uneven development does not occur.

When this heat development is completed, the drive rollers 44 and 46 are driven to rotate, and the photothermographic material 12 is further conveyed in the direction of arrow A, and the photothermographic material 12 is delivered from the thermal development device 30.

Next, a second embodiment of the present invention will be described with reference to FIG.

In this second embodiment, the heat developing device 30A is provided with a large mouth damper 62 at the end and an outlet damper 64 at the exit. The entrance damper 62 is pivotally supported at the upper end of a heat reflecting plate 66, and is capable of opening and closing the entrance of the thermal developing device 30A. A heat insulating material 68 is attached to the outer surface of the heat reflecting plate 66. The inlet damper 62 is rotated by a motor 70;
The outlet damper 64 is adapted to be rotated by a motor 72. The rotation of motors 70, 72 is controlled by control circuit 60.

Other points are similar to the first embodiment.

Next, the operation of the second embodiment configured as described above will be explained.

The large mouth damper 62 is rotated counterclockwise to remove the heat developing device 3.
Open the entrance of 0A.Next, the photothermographic material 12 is held between rollers (not shown) and conveyed in the direction of arrow A, and inserted between the ceramic plates 32 and 34.Next, the ceramic plates 32 and 34 are inserted as described above. By heating, the ceramic plates 32 and 34 emit infrared rays to heat the photothermographic material 12. Although the air between the ceramic plates 32 and 34 is also heated, the temperature of the air between the ceramic plates 32 and 34 remains constant regardless of the location because outside air does not flow into the thermal developing device 30A. Therefore, the heat-developable photosensitive material 12 is heat-developed evenly. When this heat development is completed, the outlet damper 64 is rotated clockwise in FIG.
Open exit A.

Next, the drive rollers 44 and 46 are driven to rotate to further transport the photothermographic material 12 in the direction of arrow A, and the photothermographic material 1
2 is delivered from the heat developing device 30A.

Note that the thermal development device 30.3OA can also be used as a thermal transfer device.

〔Effect of the invention〕

In the photothermographic material heating device according to the present invention, infrared rays are uniformly radiated from the infrared radiation surface provided in the infrared heating device, and the photothermographic material facing the infrared radiation surface is uniformly heated. Therefore, the heat-developable photosensitive material can be developed evenly, and the image on the heat-developable photosensitive material can be heat-transferred evenly onto the transfer paper. Further, it has the excellent effect that it is not necessary to coat the heat-developable photosensitive material with a current-carrying heating layer.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a first embodiment of a photothermographic material heating apparatus according to the present invention, and FIG. 2 is a schematic diagram showing a second embodiment of the present invention. 30.3OA...Thermal development device, 32.34...Ceramic plate, 36.40...Heater.

Claims (2)

[Claims] (1) It is characterized by having an infrared heating device provided with an infrared radiation surface facing the photothermographic material, and a moving means for feeding the photothermographic material into the infrared heating device and sending it out from the infrared heating device. A heat-developable photosensitive material heating device. (2) The photothermographic material heating device according to claim 1, further comprising an air blowing device for blowing air into the infrared heating device.