JPS6394241A - Method for coating image foaming solvent - Google Patents

Abstract

PURPOSE:To prevent uneven coating of a solvent at the time of coating the solvent by a coating roller by lifting the soln. in a tank by the outside periphery of the coating roller to form a liquid pool by the rotation of said roller, then stopping the rotation of the roller, conveying a photosensitive material, etc., and coating the solvent thereon. CONSTITUTION:The photosensitive material 16 or image receiving material is conveyed on the coating roller 52. The roller 52 is rotated and the solvent in the tank 72 is lifted by the outside periphery of the roller to form the liquid pool between the roller and the photosensitive material 16 or the image receiving material at the point of the time when the front end of said material arrives at the roller 52. The rotation of the roller 52 is stopped and in this state the material 16 or the image receiving material is conveyed and the solvent is coated on the photosenstive material or the image receiving material. The generation of stepped unevenness according to the rotation of the coating roller is thereby obviated and since the solvent is coated on the material after the roller is stopped, the uniform coating is assured.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an image recording method for obtaining an image on an image-receiving material by transferring an image recorded on a heat-developable photosensitive material to the image-receiving material in the presence of an image-forming solvent. The present invention relates to an image forming solvent coating method used in a recording device.

[Prior Art and Problems to be Solved by the Invention] As an image recording device for obtaining a color image using a heat-developable photosensitive material, as shown in JP-A-59-75247, an image recording device that exposes an image to a heat-developable photosensitive material is used. There is a known method in which the photosensitive material is then sent to a heat development section, an image receiving paper is brought into close contact with the photosensitive material after heat development, and the image is transferred to the image receiving paper through a transfer process.

Before being sent to the transfer section, this image-receiving paper is applied with a transfer aid (image-forming solvent) such as water in order to improve transfer efficiency.

For this reason, in the apparatus disclosed in JP-A-59-75247, water is applied using a roller impregnated with water. Column unevenness occurs on the image receiving paper with each rotation.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide an image forming solvent coating method that can prevent coating unevenness during solvent coating using a coating roller.

[Means and effects for solving the problems] The image forming solvent coating method according to the present invention transfers an image recorded on a photothermographic material to an image receiving material in the presence of an image forming solvent. An image-forming solvent coating method for applying the image-forming solvent to a heat-developable photosensitive material or an image-receiving material using an application roller that is used in an image recording device that forms an image on a material and is placed in a tank that stores the solvent. The photosensitive material or image-receiving material is conveyed onto the coating roller, and when the tip reaches the coating roller, the solvent in the tank is lifted by the outer periphery of the coating roller by rotation of the coating roller, and the photosensitive material is exposed. The solvent is applied to the photosensitive material or image-receiving material by forming a liquid stagnation between the material or the image-receiving material and then conveying the photo-sensitive material or image-receiving material while the rotation of the coating roller is stopped. It is closed.

Therefore, uneven coating due to the rotation of the coating roller does not occur, and since the solvent is coated while the coating roller is stopped, uniform coating is possible.

The image recording apparatus to which the present invention is applied includes a heat development section that heat-develops an exposed heat-developable photosensitive material, and a heat-developed photosensitive material and an image-receiving material that are overlapped and heated to form an image on the image-receiving material. The transfer section for transferring the image may be provided separately, or the heat development section and the transfer section may be provided at the same location, that is, the exposed heat-developable photosensitive material and the image-receiving material may be overlapped. A thermal development/transfer section may be provided that heats the image and simultaneously performs thermal development and thermal transfer.

Further, the image recording apparatus to which the present invention is applied includes, for example, U.S. Pat. No. 4,430,415, U.S. Pat.
9-154445, JP 59-165054, JP 59-180548, JP 59-218443
No., JP 60-120356, Patent Application 1982-209
No. 583, Japanese Patent Application No. 1987-79709, Japanese Patent Application No. 1987-1
69585, Japanese Patent Application No. 60-244873, and the like can be used.

In the present invention, the image-forming solvent is a solvent required for image formation, such as water, a low-boiling organic solvent (
(alcohols, ketones, amides, etc.) or those obtained by adding various additives such as surfactants, development accelerators, and development stoppers to these solvents.

[Example] An image recording apparatus to which the present invention is applied will be described below, taking as an example a case where thermal development and thermal transfer are performed simultaneously.

FIG. 2 shows an image recording apparatus 10 according to this embodiment.

In this image recording apparatus IO, a magazine 14 is mounted on a machine stand 12 and accommodates a photothermographic material 16. The photosensitive material 16 in the magazine 14 is pulled out from its outer periphery, cut into a predetermined length by the cutter 18, and then wound around the outer periphery of the exposure drum 20 (in the direction of arrow A in FIG. 2). After exposure, the exposure drum 20 is reversed, and the photosensitive material 16 is peeled off by the scraper 24 and passed through the water coating section 34 to the thermal development/transfer section 2.
It is now sent to 8.

On the other hand, the image receiving paper 32 housed in the tray 30 is sent to the thermal development/transfer section 28 and overlapped with the photosensitive material 16, and then heated by a heater in the thermal development/transfer section 28. As a result, the photosensitive material 16 is developed, and the developed image is transferred to the image receiving paper 32.

After the transfer is completed, the photosensitive material 16 is stored in a waste tray 38 via a peeling section 36, and the image receiving paper 32 is sent out via a drying section 40 to a take-out tray 42.

As shown in FIG. 1, a pair of conveyance rollers 44, 46 that sandwich the photosensitive material 16 being conveyed are arranged in the water application section 34, and a pair of conveyance rollers 44, 46 are arranged downstream of these conveyance rollers 44, 46. 48 and 50 are arranged to sandwich and convey the photosensitive material 16.

These rollers are configured to send out the photosensitive material 16 in the direction of arrow B to the thermal development/transfer section 28 by receiving the driving force of a motor (not shown). Furthermore, guide plates 51A and 51B are provided between these conveying rotors in correspondence with both ends of the photosensitive material 16 being conveyed, and guide the photosensitive material 16 from between the conveying rollers 44 and 46 to between the conveying rollers 48 and 50. It is designed to guide you.

The photosensitive material 1 is placed between the conveyance roller 46 and the conveyance roller 5o.
A coating roller 52 as a coating member corresponds to the center portion of the back surface (emulsion side) of 6. This application roller 52
The rotation wk54 is pivotally supported on the machine base 12. Further, a motor (both not shown) is connected to this rotating shaft 54 via a gear, and the application roller 52 is rotated in the direction of arrow C by the driving force of this motor.

The coating roller 52 has a water coating portion 34 at the tip of the photosensitive material 16.
When it reaches , it rotates a predetermined number of times and then stops, and this control is performed in advance in synchronization with the conveyance of the photosensitive material 16.
I'm trying to rotate it.

The coating roller 52 is partially immersed in a tank 72 filled with water 70 which is an image forming solvent.
When the roller 2 rotates, the water 70 is brought out on its circumferential surface.

The water 70 taken out by the application roller 52 is applied to the photosensitive material 16.
Applying roller 5 so that a bead 70A is formed between
The rotation speed of z is set, and in this state the photosensitive material 16
By conveying the light-sensitive material 16, coating water is carried out on the back surface (emulsion surface) of the photosensitive material 16 to form a coating film.

Note that during this coating, that is, while the photosensitive material 16 is moving on the outer periphery of the coating roller 52, the rotation of the coating roller 52 is stopped.

A supply pipe 74 for supplying the water 70 and a discharge pipe 76 for discharging 7° of water from the tank 72 are attached to the tank 72 filled with water 70, and are connected to a pump (not shown). Therefore, by driving this pump, the water in the tank 72 can be circulated or exchanged as needed.

Further, an overflow pipe 78 is attached to this tank 72 for discharging excess water 70 filled into this tank 72. The opening 78A of this O/Henlo pipe 78 is arranged at a predetermined height from the bottom surface 72A of the tank 72, and the water 7 supplied from the supply pipe 74 is
o is this opening! 78A, the water 70 is discharged to the outside of the tank 72, and the amount of water in the tank 72 (
water surface height) can be kept constant. Note that this water surface is preferably set to a height such that about 1/3 of the coating roller 52 is immersed.

The operation of this embodiment will be explained below.

The photosensitive material 16 housed in the cassette 14 is placed on the exposure drum 2.
0, exposed by the exposure head 22, and then sent to the water coating section 34.

The application roller 52 attaches the water 70 in the tank 72 to its surface and takes it out, forms a bead 70A between it and the back surface of the photosensitive material 16, and this is applied to the back surface of the photosensitive material 16.

The procedure for applying this water 70 to the photosensitive material 16 will be explained below.

First, when the photosensitive material 16 is not present in the water application section 34, the application roller 52 is stopped.

Here, when the leading end of the photosensitive material 16 is conveyed, the application roller 52 is rotated in the direction of arrow C by the driving force of the motor.
The water 70 is carried out from the tank 72 by adhering to its surface.

The water 70 taken out is applied to the coating roller 52 and the photosensitive material 1.
6 to form a bead 70A (see FIG. 1).

Next, the rotation of the coating roller 52 is stopped, and while the photosensitive material 16 is being moved, the water 70 is brought out and coated on the back surface of the photosensitive material 16. On the other hand, if coating is performed while the coating roller 52 continues to rotate as in the conventional method, unevenness will occur due to the outer peripheral shape of the coating roller 52.

When the rear end of the photosensitive material 16 is separated from the application roller 52, the excess bead 70A returns to the tank 72 by its own weight, and
Thick coating is not applied to the back surface of the photosensitive material 16 (see FIG. 3).

The photosensitive material 16 coated with water in the water coating section 34 is sent to the thermal transfer/developing section 28 . The thermal development image-receiving paper 32 taken out from the tray 30 is sent to the thermal transfer/developing section 28 and overlapped with the photosensitive material 16. Here, heat development is carried out in the presence of water, and at the same time the formed dye image is heat-transferred to the emulsion surface of the image-receiving paper 32. In this transfer state, the necessary amount of water has already been appropriately applied to the photosensitive material 16, so that an extremely good transfer operation can be performed.

Photosensitive material 16 and image receiving paper 3 remain in close contact after transfer
2 is sent from the thermal development/transfer section 28 to a peeling section 36, the photosensitive material 16 is stored in a stacking device 38, and the image receiving paper 32 is sent to a take-out section 40 and taken out.

In the two-legged embodiment, the present invention has been described with reference to the case where the photosensitive material 16 is coated with water, but the present invention is similarly applicable to the case where the image receiving paper 32 is coated with water.

Further, in the above embodiment, the intermittent rotation of the application roller 52 was performed in synchronization with the conveyance of the photosensitive material 16, but the water application section 3
A sensor or the like may be installed near the entrance of the photosensitive material 16 to detect the leading end or the trailing end of the photosensitive material 16 to control the rotation of the application roller 52.

[Effects of the Invention] As explained above, the image forming solvent coating method according to the present invention transfers the image recorded on the photothermographic material to the image receiving material in the presence of the image forming solvent, thereby forming an image on the image receiving material. An image-forming solvent coating method for applying the image-forming solvent to a heat-developable photosensitive material or an image-receiving material using a coating roller disposed in a tank for accumulating the solvent, , the photosensitive material or image-receiving material is conveyed onto the coating roller, and when the tip reaches the coating roller, the solvent in the tank is lifted by the outer periphery of the coating roller by rotation of the coating roller, and the photosensitive material or image-receiving material is The method is characterized in that the solvent is applied to the photosensitive material or image-receiving material by forming a liquid stagnation between the two and then conveying the photo-sensitive material or image-receiving material while the rotation of the application roller is stopped. It has the excellent effect of preventing coating unevenness (step unevenness depending on the rotation of the coating roller) during solvent application by the coating roller.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a water application unit according to an embodiment of the present invention at the time of coating start, FIG. 2 is a sectional view showing an image recording apparatus to which this water application unit is applied, and FIG. 3 is a sectional view of the water application unit according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing the water application section at the end of application according to the example. 10... Image recording device, 16...-Photosensitive material, 32... Image receiving paper. 34@fist/water application section, 52...application roller, 70...water, 72.O.tank.

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 in the presence of an image-forming solvent, and placed in a tank that accumulates the solvent. An image-forming solvent coating method for applying the image-forming solvent to a heat-developable photosensitive material or image-receiving material using a coating roller, the photosensitive material or image-receiving material is conveyed onto the coating roller, and the tip thereof is When the part reaches the coating roller, the solvent in the tank is lifted by the outer periphery of the coating roller to form a liquid stagnation between it and the photosensitive material or image-receiving material, and then the coating roller is rotated. 1. A method for applying a solvent for image formation, characterized in that a solvent is applied to a photosensitive material or an image-receiving material by conveying the photo-sensitive material or an image-receiving material in a state where the photosensitive material or image-receiving material is stopped.