JPS62165659A - Heating device for image recording device - Google Patents

Abstract

PURPOSE:To reduce an irregularity in temperature and to obtain superior response by heating a heat development photosensitive material or image receiving material by a heat pipe whose one end is dipped in an oil heater. CONSTITUTION:The photosensitive material 16 and image receiving paper 32 are send in between the heat pipe 44 and a pressure roller 46 at a heat development/transfer part part 28. The heat pipe 44 is heated by the oil 60 in an oil bath 56 and its surface is held at uniform temperature by its heating medium, so a necessary quantity of heat is given to the photosensitive material 16 and image receiving paper 32 and a coloring matter image which is developed thermally and formed is transferred thermally to the emulsion surface of the image receiving paper 32. This transfer operation is carried out extremely excellently because a necessary amount of water is already given to the image receiving paper 32. Specially, the heating value of the oil 60 is large, so there is no response delay in heating the photosensitive material 16 and image receiving paper 32, which are heated uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a heating device for an image recording apparatus that obtains an image on an image-receiving material by transferring an image recorded on a photothermographic material to the image-receiving material.

[Conventional technology]

As shown in Japanese Unexamined Patent Application Publication No. 59-75247, an image recording device that obtains a color image using a heat-developable photosensitive material exposes an image to the heat-developable photosensitive material in an exposure section and then sends it to a heat developing section. There is known a method in which an image receiving paper is brought into close contact with a photosensitive material, and an image is transferred to the image receiving paper through a transfer process.

In this device, development and transfer are performed using a heat roller. This heat roller is provided with a heater on the opposite side of the conveyance path of the photosensitive material or image-receiving material, and is heated by the heater to a desired temperature to apply a predetermined amount of heat to the photosensitive material or image-receiving material. This causes a time delay before the heat roller receives heat from the heater and heats the photosensitive material or image-receiving material, and causes temperature unevenness in the axial direction of the heat roller.

In consideration of the above-mentioned facts, the present invention aims to provide a heating device for an image recording apparatus that has less temperature unevenness and excellent responsiveness.

[Summary and operation of the invention]

The heating device for an image recording device according to the present invention is used in an image recording device that obtains an image on an image receiving material by transferring an image recorded on a photothermographic material to the image receiving material after development,
The method is characterized in that the heat-developable photosensitive material or the image-receiving material is heated by a heat pipe whose one end is immersed into an oil heater.

Therefore, in the present invention, since the heat capacity of the oil heater is large, the heat pipe can be sufficiently and continuously heated, and temperature unevenness due to response delay can be eliminated.

Note that image recording devices to which the heating device of the present invention can be applied include:
It may be configured such that after thermally developing the exposed heat-developable photosensitive material, the thermally developed photosensitive material and image-receiving material are overlapped and heated to transfer the image to the image-receiving material; Alternatively, the exposed heat-developable photosensitive material and the image-receiving material may be overlapped and heated to simultaneously perform thermal development and thermal transfer.

[Embodiments of the invention]

The heating device for an image recording apparatus of the present invention will be described below, taking as an example a case where thermal development and thermal transfer are performed simultaneously.

FIG. 1 shows an image recording apparatus 1 to which an embodiment of the present invention is applied.
0 is shown.

In this image recording device 10, the magazine 14 is placed on the machine base 12.
is mounted and accommodates a photothermographic material 16. This photosensitive material 16 is pulled out from the magazine 14 and cutter 1
After being cut to the required length in step 8, it is wrapped around the outer periphery of the exposure drum 20 installed in the machine tool 2 (in the direction of arrow A),
After being exposed by the exposure head 22, it is rotated in the opposite direction (
(in the direction of arrow B), it is peeled off by the scraper 24 and the water-applied part 3
This is the configuration sent to 4.

In the water application section 34, the water in the tank 66 is applied to the photosensitive material 16, and the photosensitive material 1G coated with water is transferred to the overlapping section 34.
Sent to 6.

On the other hand, the image-receiving paper 32 is supplied to the cassette 30 in a state where it is housed, receives a driving force from a conveying roller 42 that is pivotally supported on the machine stand 12, and is sent from the lowest layer to the overlapping section 26.

In the overlapping section 26, the photosensitive material 16 and the image receiving paper 32
After the images are superimposed on each other, they are sent to a thermal development/transfer section 28. A stripping section 36 is provided downstream of the thermal development/transfer section 28 , and an accumulating device 38 is provided downstream of the stripping section 36 .
The photosensitive material 16 is sent to the photosensitive material 16, and the image receiving paper 32 is sent to the take-out section 40.

In the thermal development/transfer section 28, as shown in FIG. 2, the photosensitive material 16 and the image receiving paper 32 are sandwiched and conveyed between a heat pipe 44 and a pressure roller 46. The middle portion of the heat pipe 44 is pivotally supported by a bracket 48 that stands up from the machine stand 12 via bearings 50 and 52. One end of the heat pipe 44 is connected to a variable speed motor 54, which determines the processing time for development and transfer.
Further, the rotational force of the motor 54 is received to generate a force for feeding out the photosensitive material 16 and the image receiving paper 32.

The other end of the heat pipe 44 penetrates through a seal 58 into an oil bath 56 placed on the machine stand 12. Oil 60 is filled in the oil bath 56 and heated to a desired temperature by a heater 62 controlled by a temperature controller (not shown) having a temperature sensor. Further, this oil 60 is stirred by a stirrer 64, so that the oil 60 is always kept at a uniform temperature.

Therefore, the heat medium in the heat pipe 44 is heated by the oil 60 and evaporates, reaching the intermediate portion and the vicinity of the other end where the motor 54 is connected, and heating the photosensitive material 16 and image receiving paper 32 passing through it. It is cooled to become a liquid, circulated through an internal wick, and heated again by oil 60. Note that the heater 62 may be a so-called throw-in heater.

The pressing roller 46 is pivotally supported on the machine base 12 by a bearing (not shown).

Next, the operation of this embodiment will be explained.

The photothermographic material +j taken out from the magazine 14 is wound around the exposure drum 20, exposed by the exposure head 22, and then sent to the water coating section 34.

On the other hand, among the image-receiving papers 32 stored in the cassette 30, the lowest layer of the image-receiving papers 32 is sent to the stacking section 26 by a conveying roller 42.

The photosensitive material 16 coated with water in the water coating section 34 is sent to the overlapping section 26, where the image surface of the photosensitive material 16 and the image receiving paper 3
After the transfer surfaces of
sent to.

In the thermal development/transfer section 28 , the photosensitive material 16 and the image receiving paper 32 are fed between a heat pipe 44 and a pressure roller 46 . The heat pipe 44 is connected to the oil 60 in the oil bath 56.
Since the surface is heated to a uniform temperature by the heating medium, the necessary amount of heat can be applied to the photosensitive material 16 and the image receiving paper 32, and the dye image formed by heat development can be transferred to the image receiving paper 32. can be thermally transferred to the emulsion surface. In this transfer operation, the required amount of water has already been properly applied to the image receiving paper 32, so that an extremely good transfer operation can be performed.

In particular, since the oil 60 has a large amount of heat, there is no response delay for heating the photosensitive material 16 and the image receiving paper 32, and the photosensitive material 16 and the image receiving paper 32 can be heated uniformly.

〔Effect of the invention〕

As explained above, the heating device for an image recording device according to the present invention is used in an image recording device that obtains an image on the image receiving material by transferring the image recorded on the photothermographic material to the image receiving material after development. It is characterized in that the heat-developable photosensitive material or the image-receiving material is heated by a heat pipe immersed into an oil heater, so it has excellent responsiveness,
It also has an excellent effect of enabling uniform heating.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an image recording apparatus to which the heating device of the present invention is applied, and FIG. 2 is a sectional view showing the heating device of the present embodiment. 16... Photosensitive material, 28... Thermal development/transfer section, 32... Receiving paper, 44... Heat pipe, 60... Oil, 62... Heater. Figure 1 Figure 2

Claims (1)

[Claims] (1) Used in an image recording device that obtains an image on an image-receiving material by transferring an image recorded on a heat-developable photosensitive material to the image-receiving material after development; A heating device for an image recording apparatus, characterized in that it heats a photosensitive material or the image-receiving material.