JPH01282556A - Heat development transfer device - Google Patents

Abstract

PURPOSE:To prevent transfer deviation by forming a superposing roller on a heating drum side to the hardness higher than the roller on the outer side thereof and superposing a heat development photosensitive material and an image receiving material at a prescribed curvature, then winding the materials around the heating drum. CONSTITUTION:The image receiving materials 32 is taken out by each sheet by a roller 38 and is superposed on the photosensitive material 16 by the superposing rollers 60, 62 disposed to a heat development transfer section 28. The superposed materials are fed into the transfer section 28. The roller 60 on the heating drum 34 side of the superposing rollers 60, 62 is formed to the hardness harder than the hardness of the roller 62 on the outer side thereof so that the photosensitive material 16 and the image receiving material 32 are curved at the prescribed curvature along the outside circumference of the roller 60 when these materials are pinched. The photosensitive material 16 and the image receiving material 32 are wound around the outside circumference of the heating drum 34 in such a manner, by which the transfer deviation arising from a difference in the winding diameter corresponding to the wall thickness is prevented.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a heat development transfer device, and in particular, an exposed heat development photosensitive material and an image receiving material are wound around the outer circumference of a heating drum and heated. The present invention relates to a thermal development transfer device that thermally develops a material and transfers an image to an image-receiving material.

[Prior art] An image is exposed to a heat-developable photosensitive material (image forming sheet),
An image recording apparatus is known in which this heat-developable photosensitive material is heat-developed and then superimposed on an image-receiving material and pressed, whereby an image is transferred to the image-receiving material to obtain an image.

The heat-developable photosensitive material or image-receiving material used in this type of image recording device has a predetermined length (for example, in A4 size, the total length is 21 mm).
The sheets are cut into pieces with a total length of 42 Q mm (0 mm 5 A 3 size) and stacked on top of each other, and then conveyed to the thermal development transfer section. In this heat development transfer section, each material is conveyed in a stacked state between a heated drum heated to about 90°C and an endless pressure belt for a predetermined period of time, whereby the photothermographic material is thermally developed. At the same time, the image recorded on the photothermographic material is transferred to the image-receiving material.

By the way, the outer periphery of the heating drum (between the endless crimping belt)
When winding the heat-developable photosensitive material and the image-receiving material onto the material, a pair of nipping rollers keep the materials in a flat state and overlap them, and in this state they are supplied to the outer periphery of the heating drum (between the endless pressure belt). .

Therefore, each material is reliably supplied between the heating drum and the endless pressure belt.

[Problems to be Solved by the Invention] However, here, the photothermographic material and the image receiving material, which are wrapped around the outer periphery of the heating drum (between the endless pressure belt) in a superimposed state, are wrapped around the outside of the heating drum. Naturally, the winding diameters of those located inside and those located inside are different depending on their wall thickness, so even if each material is properly overlapped by a pair of nipping rollers and fed to the outer periphery of the heating drum, There has been a problem in that as the tape is wound, the position shifts from the normal overlapping position. That is, this results in a transfer misalignment when an image recorded on a photothermographic material is transferred to an image-receiving material, and a good image may not be obtained.

In consideration of the above facts, the present invention has been developed by wrapping an exposed photothermographic material and an image-receiving material around the outer periphery of a drum, heating the photothermographic material, thermally developing the photothermographic material, and transferring an image to the image-receiving material. The object is to obtain a thermal development transfer device that can obtain good images without causing misalignment.

[Means for Solving the Problems] A thermal development transfer device according to the present invention includes a superposition roller that superimposes an exposed photothermographic material and an image-receiving material and supplies them to the outer periphery of a heating drum. A thermal development transfer device that thermally develops a photothermographic material and transfers an image to the image-receiving material by heating the photothermographic material while wrapping the material and image-receiving material in a superimposed state around the outer periphery of a heating drum. The hardness of the rollers is set so that those located on the heating drum side are harder than those located on the outside thereof,
The method is characterized in that the photothermographic material and the image-receiving material are superimposed with a predetermined curvature by the superimposing roller and then wound around the outer periphery of the heating drum.

Furthermore, the heat development transfer device according to the present invention overlaps the exposed heat development photosensitive material and the image receiving material, heats the same with a heating drum, thermally develops the heat development photosensitive material, and transfers the image to the image receiving material. A thermal development transfer device comprising: a conveyance means for supplying the heat-developable photosensitive material and the image-receiving material onto the heating drum; The present invention is characterized in that it is provided with a superimposing roller that performs superimposition by sandwiching the materials therebetween, and that the superimposing roller has a hardness softer than that of the heating drum.

[Function] In the thermal development transfer device configured according to claim (1), the exposed photothermographic material and the image-receiving material are overlapped with a predetermined curvature by the overlapping roller and then supplied to the outer periphery of the heating drum. The photothermographic material is thermally developed by being heated while being wrapped around the outer periphery of a heating drum in the overlapping state, and the image is transferred to the image receiving material.

Here, the heat-developable photosensitive material and the image-receiving material wound around the outer periphery of the heating drum have a difference in winding diameter corresponding to their wall thickness. However, since the stacking rollers located on the heating drum side are harder than those located on the outside, stacking is performed by curving along the outer periphery of the stacking roller located on the heating drum side. . The heat-developable photosensitive material and the image-receiving material thus overlapped with a predetermined curvature are supplied to a heating drum having a similar curvature, and heated by being wrapped around the outer periphery of the heating drum.

Therefore, even if each material is overlapped and supplied to the outer periphery of the heating drum and then wrapped around the outer periphery of the drum, there will be no misalignment with respect to the normal overlapping position. A good image can be obtained without any deviation.

Furthermore, in the thermal development transfer device configured according to claim (2), the overlapping roller directly contacts the heating drum, and the exposed photothermographic material and the image receiving material are sandwiched between the overlapping roller and the heating drum. They are overlapped and wrapped around a heating drum at the same time.

In this way, since both materials are overlapped and wrapped around the heating drum at the same time, it is even more effective without causing any positional deviation.

In addition, in the thermal development transfer device of the present invention, for example, US Pat. No. 4,430,415, US Pat.
No. 00626, No. 4503137, JP-A-59-1
No. 54445, JP-A-59-165054, JP-A-5
9-180548, JP 59-218443, JP 60-120356, JP 61-88256, JP 61-238056, JP 60-1695
85, Japanese Patent Application No. 60-244873, and the like can be used.

[Example] The present invention will be explained in detail below.

FIG. 1 shows an image recording apparatus 10 to which a thermal development transfer device according to the present invention is applied.

The image recording device 10 has a magazine 14 housed in the machine base 12.
A photosensitive material 16 which is a ferro-shaped image forming sheet is housed. The photosensitive material 16 is pulled out from its outer periphery, cut into a predetermined length by a cutter 18, and then wound around the outer periphery of a rotating drum 20 in the six directions of the arrows. An exposure head 22 is disposed corresponding to the outer periphery of the rotating drum 20, and rotates the rotating drum 20 in the direction of arrow B to expose an image onto the wound photosensitive material 16.

After exposure, the photosensitive material 16 is rotated in the reverse direction of the rotating drum 20.
After being peeled off from the rotating drum 20 by the scraper 24 and applied with water as an image forming solvent by the water application section 26,
The image is sent to a thermal development transfer section 28, which is a thermal development transfer device.

The thermal development transfer section 28 includes a heating drum 34 and an endless pressure belt 3.
6 and a pair of overlapping rollers 60 and 62. A halogen lamp 3 is installed inside the heating drum 34.
8, and is heated to about 90° C. by this halogen lamp 38. Further, in this embodiment, the heating drum 34 is formed to have an outer diameter of 140 mm, and the photosensitive material 16 is spread over approximately 2/3 circumference (240 mm) of the heating drum 34 between the heating drum 34 and the endless pressure belt 36. It is designed to be held and conveyed and thermally developed.

The pair of overlapping rollers 60 and 62 are rubber rollers, and the overlapping roller 60 located on the heating drum 34 side is harder than the overlapping roller 62 located on the outside. In this embodiment, the overlapping roller 60 has a rubber hardness of 50 to 80 degrees, and the overlapping roller 62 has a rubber hardness of 20 to 50 degrees.

On the other hand, a tray 30 disposed below the thermal development transfer section 28
Inside is a specified length, for example, for A4 size, the total length is 210m.
A plurality of image-receiving materials 32 cut to a total length of 420 mm (for A3 size and 420 mm) are accommodated. A color developer is applied to the image forming surface of the image-receiving material 32, and the image-receiving material 32 is taken out one by one by a supply roller 38 disposed on the side. Image receiving material 32 taken out
is the overlapping roller 6 disposed in the thermal development transfer section 28.
0.62, the photosensitive material 16 is superimposed on the photosensitive material 16 and sent to the thermal development transfer section 28.

Here, the overlapping rollers 60 and 62 are connected to the heating drum 34.
Since the overlapping roller 60 located on the side is harder than the overlapping roller 62 located on the outside, the photosensitive material 16 and the image receiving material 32 sandwiched between these overlapping rollers are as shown in FIG. They are curved along the outer periphery of the overlapping roller 60 and overlapped with a predetermined curvature. For this reason, a difference in winding diameter corresponding to the wall thickness that occurs when the photosensitive material 16 and image receiving material 32 are wound around the outer periphery of the heating drum 34 is already generated at the time of overlapping, so that normal overlapping occurs during transfer. This is to prevent positional deviation from occurring.

A peeling means 48 is disposed on the side of the heat development transfer section 28, and the peeling means 48 removes the photosensitive material 16 sent out from the heat development transfer section 28.
The image receiving material 32 and the image receiving material 32 are separated and sent out.

The separated photosensitive material 16 is sent to a waste photosensitive material storage box 59, while the image receiving material 32 is dried in a drying device 52 and then sent onto a take-out tray 54 formed at the top of the machine base 12. It is now possible to

Next, the operation of this embodiment will be explained.

The photosensitive material 16 pulled out from the magazine 14 is cutter 1
8 and then wrapped around the outer circumference of the rotating drum 20, the rotating drum 20 rotates at high speed and the exposure head 2
2, the image is exposed.

After exposure, the photosensitive material 16 is peeled off by a scraper 24, coated with water at a water coating section 26, and sent to a thermal development transfer section 28.

On the other hand, the image receiving material 32 in the tray 30 is taken out one by one by the supply roller 38, and further, the image receiving material 32 is taken out one by one by the supply roller 38, and
The photosensitive material 16 is superimposed on the photosensitive material 16 by superimposing rollers 60 and 62 disposed in the photosensitive material 16, and the photosensitive material 16 is conveyed to the thermal development transfer section 28 in a state in which the photosensitive material 16 is in close contact with the photosensitive material 16.

Here, the overlapping rollers 60 and 62 are connected to the heating drum 34.
Since the stacking roller 60 located on the side is harder than the stacking roller 62 located on the outside, the photosensitive material 16 and image receiving material 32 sandwiched between the stacking rollers are
are overlapped with a predetermined curvature in a curved state along the outer periphery of the overlapping roller 60 as shown in FIG. Therefore, the photosensitive material 16 and the image receiving material 32 are transferred to the heating drum 3.
They are overlapped with each other with a difference in winding diameter corresponding to the wall thickness that occurs when the wires are wound around the outer periphery of No. 4. Therefore, during transfer, no positional deviation from the normal overlapping position occurs.

Photosensitive material 16 and image receiving material 3 sent to thermal development transfer section 28
2 means that it can be used while it is still in close contact.
The image recorded on the photosensitive material 16 is transferred between the heating drum 34 heated to about 90° C. and the endless pressure belt 36 over approximately 2/3 of the circumference of the heating drum 34 and thermally developed. Transferred to material 32.

In this case, the photosensitive material 16 and the image receiving material 32 are placed on the heating drum 3.
A difference in the winding diameter corresponding to the wall thickness that occurs when the image is wrapped around the outer periphery of the image receiving material 34 is generated in advance by the overlapping rollers 60 and 62, and after being overlaid, the image is wound around the outer periphery of the heating drum 34. A good image can be obtained without any transfer misalignment when transferring.

After the transfer, the photosensitive material 16 and the image-receiving material 32 are separated by a peeling means 48, the photosensitive material 16 is sent to a waste photosensitive material storage box 59, and the image-receiving material 32 is taken out to a take-out tray 54 via a drying device 52.

Note that in this embodiment, a pair of overlapping rollers 60
．． 62 are both rubber rollers, but the configuration is not limited to this, and the overlapping roller 6 located on the heating drum 34 side
0 may be a metal roller.

In addition, as shown in FIG.
4, and the photosensitive material 16 and image receiving material 32 are placed on the heating drum 3.
It is also possible to have a configuration in which the rollers are curved and overlapped along the outer periphery of the overlapping roller 60 located on the 4th side.

Furthermore, as shown in FIG.
The photosensitive material 16 and the image receiving material 32 are placed in contact with each other.
It is also possible to have a structure in which these are sandwiched between the overlapping roller 66 and the heating drum 34 and overlapped. In this case, since the overlapping of both materials and the winding around the heating drum 34 are performed simultaneously, it is more effective without causing positional deviation.

[Effects of the Invention] As explained above, the heat development transfer device according to the present invention wraps the exposed heat development photosensitive material and the image receiving material around the outer periphery of the drum, heats it, thermally develops the heat development photosensitive material, and receives the image. It has an excellent effect in that a good image can be obtained without transfer deviation when transferring an image to a material.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an image recording apparatus to which a thermal development transfer device according to the present invention is applied, FIG. 2 is a schematic sectional view showing overlapping rollers of the thermal development transfer device, and FIGS. 3 and 4. FIG. 3 is a schematic cross-sectional view showing a superposing roller according to another embodiment. 10... Image recording device, 16... Photosensitive material, 28... Thermal development transfer section, 32... Image receiving material, 34... Heating drum, 36... Endless pressure bonding belt, 60.62. ...Overlapping roller, 64... Overlapping roller, 66... Overlapping roller.

Claims (2)

[Claims] (1) Equipped with a superposition roller that superimposes the exposed photothermographic material and image-receiving material and supplies them to the outer periphery of the heating drum. A thermal development transfer device that thermally develops a photothermographic material by heating it while being wrapped around the outer periphery and transfers an image to an image receiving material. Thermal development is characterized in that the photothermographic material and the image-receiving material are made to be harder than those located on the outside, and are wrapped around the outer periphery of the heating drum after the photothermographic material and the image-receiving material are superimposed with a predetermined curvature by the superimposing roller. Transfer device. (2) A thermal development transfer device for overlapping an exposed photothermographic material and an image-receiving material and heating them with a heating drum to thermally develop the photothermographic material and transfer an image to the image-receiving material, comprising: A conveying means for supplying the heat-developable photosensitive material and the image-receiving material onto a heating drum, and a conveying means that comes into contact with the heating drum and sandwiches the heat-developable photo-sensitive material and the image-receiving material conveyed by the conveying means therebetween to perform overlapping. 1. A thermal development transfer device comprising: an overlapping roller; and the overlapping roller has a hardness softer than that of the heating drum.