JPH10249265A - Apparatus for coating liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the quantity of a coating liquid to be applied to a material to be coated always constant regardless of viscosity change due to temperature fluctuations by detecting the viscosity of the coating liquid and controlling the quantity of the coating liquid on the surface of a coating liquid applying member based on the detected viscosity of the coating liquid. SOLUTION: A coating liquid tank 11 holds a coating liquid 30 to be supplied to a liqiud applying roller 12. A liquid viscosity detection part 2a detects the viscosity of the coating liquid 30. A liquid quantity control part 3a controls the quantity of the coating liquid 30 on the surface of the liquid coating roller 12 based on the viscosity of the coating liquid 30 detected by the liquid viscosity detection part 2a. The liquid coating roller 12 holds the coating liquid 30 supplied from the coating liquid tank 11 on the surface and applies the held coating liquid 30 on a film-like material 20 to which the coating liquid 30 is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid coating apparatus for applying a coating liquid to a film-shaped object to be coated, and more particularly to stabilizing the amount of the liquid applied.

[0002]

2. Description of the Related Art An image formed by an electrophotographic copying machine or a facsimile machine and an image formed by thermal transfer and hot-melt ink-jet are removed from a recording material to reproduce the recording material. Have been. For example, an image removal accelerating liquid, which is an aqueous solution containing a surfactant or the like, is applied to a recording material made of paper or the like, and a peeling member is heated and adhered to the surface of the recording material to which the image removal accelerating liquid is applied, which has an image formed material. The recording material is reproduced by pressure bonding and transferring the image forming substance to a peeling member. Here, the image removal accelerating liquid may be applied to a recording material before image formation.

[0003] As a liquid application apparatus for applying an application liquid to a film-shaped object such as applying an image removal accelerating liquid to the recording object, for example, a liquid application roller having a plurality of concave portions on the surface is used. There is an apparatus that holds a coating liquid from a coating liquid tank on the surface of a liquid coating roller and presses a film-shaped coating object onto the liquid coating roller to apply the coating liquid on the surface of the liquid coating roller to the coating object.

In such a liquid coating apparatus, for example, about 0.5 to 2 g of a coating liquid per one side of an A4 plate coated object is uniformly coated on one or both sides of a film-shaped coated object, so that the surface of the liquid coating roller is coated. A liquid amount restricting member for restricting the amount of the coating liquid to a constant value has been used.

[0005]

However, since the viscosity of the coating solution changes due to the influence of the environment in which the coating solution is applied, it is difficult to apply the coating solution by limiting the amount of the coating solution on the surface of the liquid applying roller. In some cases, there was a large difference between the amount of the liquid and the amount of the actually applied coating liquid.

The present invention has been made to solve such a disadvantage, and has as its object to stabilize a coating amount.

[0007]

A liquid coating apparatus according to the present invention includes a coating liquid tank, a liquid coating member, a liquid viscosity detecting section, and a liquid amount control section, and the coating liquid tank supplies the liquid to the liquid coating member. Holding the liquid, the liquid coating member holds the coating liquid from the coating liquid tank on the surface, and applies the held coating liquid to the film-shaped object to be coated;
The liquid viscosity detection unit detects the viscosity of the coating liquid, and the liquid amount control unit controls the amount of the coating liquid on the surface of the liquid coating member based on the viscosity of the coating liquid detected by the liquid viscosity detection unit, and applies it to the object to be coated. The amount of the coating liquid to be applied is kept constant.

Further, the liquid viscosity detecting section detects the viscosity of the coating liquid based on the load applied to the liquid coating member by the coating liquid in the coating liquid tank.

In addition, the apparatus has a coating liquid stirring section for stirring the coating liquid in the coating liquid tank, and the liquid viscosity detecting section detects the coating liquid based on a load applied to the coating liquid stirring section by the coating liquid in the coating liquid tank. Detect viscosity.

Further, the liquid viscosity detecting section obtains the viscosity of the coating liquid based on the liquid temperature of the coating liquid.

Further, the liquid amount control section increases the amount of the coating liquid on the surface of the liquid coating member when the viscosity of the coating liquid detected by the liquid viscosity detecting section is high, and increases the amount of the coating liquid when the viscosity of the coating liquid is low. The amount of the application liquid on the surface of the application member is reduced so that the amount of the application liquid applied to the object to be applied becomes constant.

The liquid application member has a plurality of recesses on its surface for holding a coating liquid to be applied to a film-shaped object to be coated, and the liquid amount control unit controls the viscosity of the coating liquid detected by the liquid viscosity detection unit. The amount of the coating liquid to be filled into the concave portion on the surface of the liquid coating member is controlled.

The liquid amount control unit controls the moving speed of the liquid application member in the application liquid based on the viscosity of the application liquid detected by the liquid viscosity detection unit, so as to fill the concave portion on the surface of the liquid application member. Control the volume of liquid.

In addition, the liquid application member has a liquid amount limiting member for limiting the amount of the application liquid on the surface of the liquid application member, and the liquid amount control unit and the liquid application member based on the viscosity of the application liquid detected by the liquid viscosity detection unit. The amount of the application liquid on the surface of the liquid application member is controlled by controlling the distance from the amount limiting member.

Further, the liquid coating apparatus has a coating liquid tank, a liquid coating member, a liquid viscosity detecting section, and a liquid amount control section, and the coating liquid tank holds a coating liquid to be supplied to the liquid coating member. Holds the coating liquid from the coating liquid tank on the surface, applies the held coating liquid to the film-shaped object to be coated, the liquid viscosity detecting section detects the viscosity of the coating liquid, and the liquid amount controlling section detects the liquid viscosity. The amount of application liquid transferred from the liquid application member to the object to be coated is controlled by controlling the time during which the liquid application member contacts the object to be coated based on the viscosity of the application liquid detected by the unit.

Further, the liquid amount control section controls the moving speed of the liquid application member when it comes into contact with the object to be coated based on the viscosity of the application liquid detected by the liquid viscosity detection section. Controls the amount of coating solution transferred to the object.

Further, an image removal accelerating liquid for accelerating removal of a thermoplastic or heat-meltable image forming substance for forming a film-like image from a sheet-like recording material is held in the coating liquid tank as the above-mentioned coating liquid. Then, an image removal accelerating liquid is applied to the recording material before the image forming process as the object to be coated.

An image removal accelerating liquid for accelerating the removal of a thermoplastic or heat-fusible image forming substance for forming a film-like image from a sheet-like recording material is held in the coating liquid tank as the coating liquid. Then, an image removal accelerating liquid is applied to the recording material before removing the image forming substance as the object to be coated.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid coating apparatus according to the present invention applies a uniform and constant amount of a coating liquid to a film-like object to be coated. In particular, the coating amount changes due to a change in the viscosity of the coating liquid. It is to prevent that.

The liquid application device has, for example, a roller coater, a liquid viscosity detector, and a liquid amount controller. The roller coater includes, for example, a coating liquid tank, a liquid coating member, a liquid amount limiting member, and a pressing member. The coating liquid tank holds a coating liquid to be applied to a film-shaped object to be coated. The liquid transporting member includes, for example, a liquid application roller. The liquid application roller takes out the application liquid from the application liquid tank on the roller surface, and applies the taken out application liquid to the object to be applied.
The liquid amount limiting member includes, for example, a liquid amount limiting roller. The liquid amount limiting roller limits the amount of the application liquid on the surface of the liquid application roller by a gap with the liquid application roller. The pressing member includes, for example, a pressing roller. The pressing roller presses the object to be applied to the liquid application roller, and applies the application liquid on the surface of the liquid application roller to the object. The liquid viscosity detection unit is a unit that detects the viscosity of the application liquid, and detects the viscosity of the application liquid based on, for example, the resistance value of the application liquid to the rotating liquid application roller. Here, the liquid viscosity detection unit may detect the viscosity of the coating liquid based on a load applied to the coating liquid stirring unit that stirs the coating liquid in the coating liquid tank. Further, since the temperature of the coating liquid and the viscosity of the coating liquid have a fixed relationship, the temperature of the coating liquid may be detected, and the viscosity of the coating liquid may be obtained based on the detected temperature of the coating liquid.

The liquid amount control section controls the amount of the coating liquid held on the surface of the liquid applying roller based on the viscosity of the coating liquid detected by the liquid viscosity detecting section, and controls the application of the coating liquid held on the surface of the liquid applying roller. The amount of application liquid transferred from the liquid application roller to the object is controlled by controlling the time during which the liquid application roller is in contact with the object when applying the liquid to the object. This is because the liquid permeation rate decreases as the viscosity of the liquid increases, and the liquid does not sufficiently transfer in a short-time contact.

When controlling the amount of the coating liquid held on the surface of the liquid coating roller, the liquid amount control unit increases the amount of the coating liquid on the surface of the liquid coating roller, and when the viscosity of the coating liquid is low, the liquid coating roller So that the amount of coating liquid on the surface is small,
The amount of the coating liquid applied to the object to be coated is made constant. The liquid amount control unit includes, for example, a liquid amount limiting roller driving unit and a controller. The liquid amount restricting roller driving unit moves the liquid amount restricting roller and adjusts the gap between the liquid amount restricting roller and the liquid application roller under the control of the controller. The controller adjusts the amount of the application liquid on the surface of the liquid application roller via the liquid amount limiting roller drive unit based on the viscosity of the application liquid.

The liquid amount control section may include a controller for controlling the rotation speed of the liquid application roller based on the viscosity of the application liquid.

Further, the liquid application roller may be provided with a plurality of concave portions for holding the application liquid on the surface, and the liquid amount control section may be provided with a controller for controlling the depth of the concave portion based on the viscosity of the application liquid.

Further, an image removal accelerating liquid for accelerating removal of a thermoplastic or heat-fusible image forming substance for forming a film-like image from a sheet-shaped recording material is held in the coating liquid tank as the above-mentioned coating liquid. Alternatively, the recording material before the image forming process may be used as the object to be coated, and the image removal accelerating liquid may be applied to the recording material before the image forming process.

An image removal accelerating liquid for accelerating the removal of a thermoplastic or heat-fusible image forming substance for forming a film-like image from a sheet-shaped recording material is held in the coating liquid tank. Alternatively, a recording material before the image forming substance is removed may be used as the object to be coated, and the image removal accelerating liquid may be applied to the recording material before the image forming substance is removed.

[0027]

FIG. 1 is a block diagram of a liquid coating apparatus according to the present invention. As shown in the figure, the liquid application device is a roll coater 1
a, a liquid viscosity detector 2a and a liquid amount controller 3a. The roll coater 1a includes, for example, a coating liquid tank 11, a liquid coating roller 12, a liquid amount limiting member, and a pressing roller 14. The coating liquid tank 11 holds a coating liquid 30 to be applied to the film-shaped object 20. The liquid application roller 12 holds the application liquid 30 taken out of the application liquid tank 11 on the roller surface. The liquid amount limiting member is, for example, as shown in FIG.
31 after passing the liquid amount limiting roller 131 in the gap with the liquid applying roller 12 and
Before applying 0, the amount of the application liquid 30 on the surface of the liquid application roller 12 is limited to a constant amount. The press roller 14 is used to
Is pressed against the liquid application roller 12 to apply the application liquid 30 on the surface of the liquid application roller 12 to the object 20.

The liquid viscosity detecting section 2a measures a resistance value which the liquid applying roller 12 receives from the application liquid 30 when the liquid applying roller driving section 121 rotates the liquid applying roller 12 as shown in FIG. 3, for example. The viscosity of the coating liquid 30 is determined based on the measured resistance value.

The liquid amount control section 3a includes, for example, a liquid amount limiting roller driving section 32 and a controller 33a. The liquid amount limiting roller driving unit 32 is controlled by the controller 33 to
The liquid amount limiting roller 131 is moved to
And the gap between the liquid application roller 12 and the liquid application roller 12 are adjusted. The controller 33 adjusts the amount of the application liquid 30 on the surface of the liquid application roller 12 via the liquid amount limiting roller driving unit 32 based on the viscosity of the application liquid 30 detected by the liquid viscosity detection unit 2a. Here, FIG.
When the coating is performed under the same conditions as shown in (3), the higher the viscosity of the coating liquid 30, the smaller the amount of the coating liquid 30 applied. The gap with the roller 12 is increased to increase the amount of the application liquid 30 held by the liquid application roller 12. Conversely, the controller 33 reduces the gap between the liquid amount limiting roller 131 and the liquid application roller 12 as the viscosity of the application liquid 30 decreases, and reduces the amount of the application liquid 30 held by the liquid application roller 12. By changing the amount of the application liquid 30 held by the liquid application roller 12 according to the viscosity of the application liquid 30 in this manner, the amount of the application liquid 30 applied to the object 20 can be changed regardless of the viscosity of the application liquid 30 or the like. It can be controlled to be always constant.

Further, the liquid coating apparatus includes a roll coater 1a,
A coating liquid stirring unit 4, a liquid viscosity detection unit 2b, and a liquid amount control unit 3a shown in FIG. 5 may be provided. Coating liquid stirring unit 4
Includes a stirring unit 41 and a stirring driving unit 42. Stirrer 41
Has a plurality of blades that rotate in the coating liquid tank 11 by the driving force from the stirring driving unit 42, and stirs the coating liquid 30 in the coating liquid tank 11. The liquid viscosity detecting unit 2b detects a resistance value received by the stirring unit 41 from the coating liquid between the stirring unit 41 and the stirring driving unit 42, and based on the detected resistance value, determines a viscosity of the coating liquid 30 in the coating liquid tank 11 based on the detected resistance value. Is detected.

Further, as shown in FIG. 6, the liquid coating apparatus includes a liquid temperature sensor 5 for detecting the liquid temperature of the coating liquid 30 and a coating liquid 30 based on the liquid temperature of the coating liquid 30 detected by the liquid temperature sensor 5.
May be provided with a liquid viscosity detector 2c for detecting the viscosity of the liquid. This is because the liquid temperature of the coating liquid 30 and the viscosity of the coating liquid 30 have, for example, a proportional relationship as shown in FIG.

The liquid coating apparatus has a liquid coating roller 12 having a plurality of recesses 122 for holding a coating liquid 30 to be coated on the object 20 as shown in FIG. The amount of the coating liquid 30 to be filled in the recess 122 may be controlled based on the viscosity.

Here, the coating liquid 30 to be filled in the concave portion 122
9A and 9B, for example, to control the amount of
The amount of the application liquid 30 that can be filled is changed by changing the depth of the concave portion 122 as shown in FIG. The depth of the recess 122 is changed by changing the position of the piston inside using, for example, a syringe structure. Further, the size of the concave portion 122 may be changed by using a member that changes with temperature or the like.

In each of the above-described configurations, the amount of the coating liquid 30 held by the liquid coating roller 12 is changed in accordance with the viscosity of the coating liquid 30, but the amount of the coating liquid 30 held by the liquid coating roller 12 is kept constant. The liquid application roller 12 is
The amount of the application liquid 30 transferred from the liquid application roller 12 to the application object 20 may be kept constant by changing the time of contact with zero. This is because the liquid penetration speed u is the radius formed by the particles in the powder layer r, the distance that the liquid permeates the powder layer within the time t is l, the viscosity of the liquid is η, the surface tension of the liquid is γ, Assuming that the contact angle between the liquid and the solid surface is θ and the pressure from the rough surface is p, u = ｛r ² / (8
ηl)｝ × (2γ cos θ / r + p),
If the viscosity of the liquid increases, the permeation rate of the liquid decreases,
The contact time between the liquid application roller 12 and the object 20 can be changed according to the permeation speed, or the liquid application roller 12 and the object
By changing the pressure between them, the penetration amount of the coating liquid is kept constant.

In order to change the time during which the liquid application roller 12 contacts the object 20, for example, the rotation speed of the liquid application roller 12 is changed. Also, as shown in FIG.
5, spring 16, contact interval changing rollers 17a, 17
b and the separation claw 18 may be used. The presser belt 15
For example, one end is fixed and the other end is pulled by a spring 16 so that no slack occurs.
The contact interval changing rollers 17a and 17b are the liquid application rollers 1
2 moves along the outer periphery of each other and approaches or separates from each other to press the object 20 against the liquid applying roller 12 via the pressing belt 15, thereby shortening the time when the object 20 contacts the liquid applying roller 12. To make it longer.

Since the liquid permeation speed increases as the pressure increases, as shown in FIG.
1 and the pressing roller 14 according to the viscosity of the object 20 to be coated.
The pressure applied to the liquid application roller 12 may be changed.

In place of the roll coater 1a, for example, as shown in FIG. 12, a coater 1b including a coating liquid tank 11, a liquid pumping roller 123, a coating roller 124, a liquid amount limiting member 13, and a pressing roller 14 is used. The application liquid 30 pumped from the application liquid tank 11 by the liquid pumping roller 121 may be transferred to the application roller 124 and then applied to the object 20.

Further, as shown in FIG. 13, the object 20 is coated with a pair of coating liquid tanks 11a and 11b, a coater 1c having liquid coating rollers 12a and 12b and liquid amount limiting rollers 131a and 131b. Liquid application rollers 12a, 12
The coating liquid 30 may be applied to both surfaces of the article 20 to be sandwiched between b.

Further, as shown in FIG.
2 instead of using the tension rollers 125a, 125
Application belt 1 maintaining constant tension at b and 125c
26 may be used.

Further, the above-mentioned liquid coating apparatus is used, for example, in FIG.
As shown in FIG. The recording material reproducing apparatus includes an image formed of a thermoplastic or heat-fusible image forming substance formed by an electrophotographic copying machine or a facsimile machine, and a thermoplastic or heat formed by a method such as thermal transfer or hot melt inkjet. The image formed of the fusible image forming substance is removed from the recording material 20 (object to be coated), and the recording material 20 is reproduced. The recording material reproducing apparatus includes a paper feed unit 50, a liquid application device 1, an image forming substance peeling unit 60, a drying unit 70, and a paper receiving unit 80 as an image removal accelerating liquid applying unit. The paper feed unit 50 is a recording material 20 (a material to be coated).
Is fed from the uppermost sheet by a feed roller 52, a multi-feed is separated by a separation mechanism (not shown), and only one sheet of the recording material 20 is adjusted in timing and skew corrected using a pair of registration rollers 53. And send it out. The liquid application device 1 stores the image removal promoting liquid 30 (application liquid) in the application liquid tank 11 by the automatic liquid replenisher 192.
Is supplied, and the image removing accelerating liquid 30 held in the coating liquid tank 11 is thinly and uniformly applied to the recording material 20 fed by the sheet feeding unit 21. Here, the image removal accelerating liquid is one that facilitates separation of the image forming substance and the recording material,
For example, it is composed of an aqueous solution containing a surfactant or the like. The image forming substance peeling unit 60 includes peeling belts 61a and 61b, a plurality of peeling rollers 62, and spiral rollers 64a and 64b. The peeling belts 61a and 61b are
Sandwiches the fed recording material 20 and sends it to the peeling roller 62. The peeling roller 62 scratches the heating lamp 63 to soften the image forming material and generate shear between the image forming material and the recording material 20. Thus, the image forming substance can be transferred to the transfer belts 61a and 61b and removed from the recording material. Here, if the application of the image removal accelerating liquid by the liquid application device 1 is insufficient or not uniform, the removal of the image forming substance may be insufficient. The spiral rollers 64a and 64b are used as the peeling belt 61.
a, 61b to remove the image forming substance.

The drying unit 70 dries the recording material 20 and includes a drying drum 72 for scraping the heating lamp 71 and a finishing belt 73. The drying drum 72
For example, it is made of aluminum. The finishing belt 73 is made of a member having good air permeability and high surface smoothness. Thus, instead of using the drying drum 72 or the like, a hot air fan or an infrared lamp may be used. The paper receiving unit 80 receives the recording material 20 from the drying unit 70 after the removal of the image forming substance. Using the recording material reproducing apparatus thus configured, the recording material 20 after image formation is used.
By applying the image removal accelerating liquid 30 to the recording medium 20 and separating the image forming substance from the recording medium 20, the reproduction of the recording medium 20 can be performed accurately.

Further, any one of the above-mentioned liquid application devices may be used as an image removal promoting liquid pre-application device. The image removal promoting liquid pre-coating device is a device that applies the image removal promoting liquid 30 to the recording material 20 such as copy paper before image formation. On the recording material 20 after applying and drying the image removal accelerating liquid 30,
An image composed of a thermoplastic or heat-meltable image forming substance is formed by an electrophotographic copying machine or a facsimile machine, or an image composed of a thermoplastic or heat-meltable image forming substance is formed by a method such as thermal transfer or hot melt inkjet. To form Using a device in which the liquid coating device is removed from the recording material reproducing device described above, the peeling belt 61a,
61b is brought into contact with the recording surface of the recording material 20 and subjected to a heating and pressurizing process, whereby the image forming substance is transferred to the recording material 20.
From the recording material 20 to the release belts 61a and 61b.
To remove the image forming substance. Here, if the image removal accelerating liquid 30 is not uniformly applied to the recording material 20, the transfer of the image forming substance from the recording material 20 may not be sufficiently performed. By doing
The image removal accelerating liquid 30 can be uniformly applied, and the recording material 20 can be accurately reproduced.

(Specific Examples) Next, several specific examples in which an image removing accelerating liquid is applied as a coating liquid to an object to be coated using the above-described liquid coating apparatus will be described.

(Specific Example 1) Liquid viscosity detector 2a shown in FIG.
The liquid application device shown in FIG. 12 and having the liquid amount control unit 3a shown in FIG. 3 was used. A4-size PPC paper was used for the object to be coated. The temperature of the image removal accelerating liquid was set to 20 degrees Celsius, and a blade was used as the liquid amount limiting member 13. As a result, 1
g. The image removing accelerating liquid can be uniformly applied to the PPC paper, and the heating / pressurizing treatment is performed by bringing the peeling member into contact with the recording surface of the PPC paper using the recording material reproducing apparatus as described above. As a result, the image forming substance was successfully removed from the PPC paper. Next, when the temperature of the image removal accelerating liquid was lowered to 5 degrees Celsius, an increase in the viscosity of the coating liquid 30 was detected. Correspondingly, by widening the gap between the liquid application roller 12 and the liquid amount limiting member 13, the image removal accelerating liquid can be applied in the same manner as when the temperature of the image removal accelerating liquid 30 is 20 degrees Celsius. By bringing the member into contact with the recording surface of the PPC paper and performing the heating and pressurizing treatment, the image forming substance was successfully removed from the PPC paper.

(Specific Example 2) The liquid coating apparatus shown in FIG. 12 and having the coating liquid stirring section 4 and the liquid viscosity detecting section 2b shown in FIG. 5 was used. A PPC paper source was used as an object to be coated. The temperature of the image removal accelerating liquid was set to 18 degrees Celsius, and a squeeze roller was used as the liquid amount limiting member 13. As a result, a fixed amount of the image removal accelerating liquid could be uniformly applied to the PPC paper. Next, when the temperature of the image removal accelerating liquid was raised to 40 degrees Celsius, a decrease in the viscosity of the coating liquid 30 was detected. By correspondingly increasing the driving speed of the liquid pumping roller 123 and the application roller 124, the image removal promoting liquid could be applied in the same manner as when the temperature of the image removal promoting liquid 30 was 18 degrees Celsius. By bringing the release member into contact with the recording surface of the PPC paper and performing the heating and pressurizing treatment, the image forming substance was successfully removed from the PPC paper.

(Specific Example 3) Liquid viscosity detecting section 2c shown in FIG.
A liquid application device shown in FIG. 14 and a press belt 15 shown in FIG. 10 was used. 20 ° C image removal accelerating liquid PP
When applied to the C paper, a certain amount of the image removal accelerating liquid can be uniformly applied to the PPC paper, and the peeling member is brought into contact with the recording surface of the PPC paper, and is heated and pressurized to form an image from the PPC paper. The material was successfully removed. Next, when the temperature of the image removal promoting liquid was lowered to 5 degrees Celsius, an increase in the viscosity of the image removal promoting liquid was detected. Correspondingly, contact interval changing rollers 17a, 17b
Is extended to extend the contact time between the application belt 126 and the PPC paper, so that the image removal promoting liquid can be applied in the same manner as when the temperature of the image removal promoting liquid 30 is 20 degrees Celsius. Was brought into contact with the recording surface of the PPC sheet, and the heating and pressurizing treatment was performed, whereby the image forming substance could be removed from the PPC sheet in a satisfactory manner.

(Specific Example 4) The liquid viscosity detector 2a shown in FIG.
The liquid application apparatus shown in FIG. A4-size PPC paper was used for the object to be coated. The temperature of the image removal accelerating liquid was set to 18 degrees Celsius. As a result, 2 g of the image removal accelerating liquid can be uniformly applied to the PPC paper, and the peeling member is brought into contact with the recording surface of the PPC paper, and the heating and pressurizing treatment is performed, whereby the image forming substance can be removed from the PPC paper. Could be removed. Next, when the temperature of the image removal accelerating liquid was raised to 40 degrees Celsius, a decrease in the viscosity of the coating liquid 30 was detected. By increasing the driving speed of the liquid application roller 12 correspondingly, the temperature of the image removal accelerating liquid 30 becomes 1 degree Celsius.
The image removal accelerating liquid can be applied in the same manner as at 8 degrees, and the peeling member is brought into contact with the recording surface of the PPC paper, and the heating and pressurizing treatment is performed, whereby the image forming substance is successfully removed from the PPC paper I was able to.

(Embodiment 5) Pressing belt 15 shown in FIG.
Instead of using the liquid application apparatus, a liquid coating apparatus having the same configuration as that of the specific example 3 was used except that the pressing force control unit 141 shown in FIG. 11 was provided. When the image removal accelerating liquid of 18 degrees Celsius is applied to the PPC paper, a certain amount of the image removal accelerating liquid can be uniformly applied to the PPC paper, and the peeling member is brought into contact with the recording surface of the PPC paper, and heated and pressed. By processing, PP
The image forming substance was successfully removed from the C paper. Next, when the temperature of the image removal accelerating liquid was lowered to 5 degrees Celsius, an increase in the viscosity of the coating liquid 30 was detected. By correspondingly increasing the pressure of the press roller 14 against the liquid application roller 12, the temperature of the image removal accelerating liquid 30 becomes 1 degree Celsius.
The image removal accelerating liquid can be applied in the same manner as at 8 degrees, and the peeling member is brought into contact with the recording surface of the PPC paper, and the heating and pressurizing treatment is performed, whereby the image forming substance is successfully removed from the PPC paper I was able to.

Comparative Example 1 The liquid viscosity detecting section 2a and the liquid amount control section 3a were removed from the liquid applying apparatus of the first embodiment, and the gap between the liquid applying roller 12 and the liquid amount limiting member 13 was fixed. Under a room temperature environment, a fixed amount of the image removal accelerating liquid could be uniformly applied to the PPC paper in the same manner as in Example 1. Next, when the temperature of the image removal accelerating liquid is lowered to 5 degrees Celsius, the amount of the liquid removal accelerating liquid applied is reduced, and thereafter, the peeling member is brought into contact with the recording surface of the PPC paper, and the heating and pressurizing treatment is performed. In the image removing process, a peeling failure of the image forming substance occurred.

Comparative Example 2 A liquid coating apparatus having the same configuration as that of the specific example 2 was used, except that the driving speeds of the liquid pumping roller 123 and the application roller 124 were fixed. As a result of setting the temperature of the image removal accelerating liquid to 18 degrees Celsius, a certain amount of the image removal accelerating liquid could be uniformly applied to the PPC paper. Next, when the temperature of the image removal accelerating liquid was raised to 40 degrees Celsius, the applied amount of the image removal accelerating liquid increased, and the paper was wound around the application roller 124 and finally torn.

(Comparative Example 3) A liquid coating apparatus having the same configuration as that of the specific example 3 was used except that the pressing roller 14 shown in FIG. 14 was used instead of using the pressing belt 15. Under a room temperature environment, a uniform amount of the image removal accelerating liquid
It could be applied to PC paper. Next, when the temperature of the image removal accelerating liquid is lowered to 5 degrees Celsius, the amount of the liquid removal accelerating liquid applied is reduced, and thereafter, the peeling member is brought into contact with the recording surface of the PPC paper, and the heating and pressurizing treatment is performed. In the image removing process, a peeling failure of the image forming substance occurred.

Comparative Example 4 A liquid coating apparatus having the same conditions and configuration as in Example 4 was used except that the driving speed of the liquid coating roller 12 was kept constant. Under a room temperature environment, a fixed amount of the image removal accelerating liquid could be uniformly applied to the PPC paper in the same manner as in Example 3. Next, when the temperature of the image removal accelerating liquid was raised to 40 degrees Celsius, the applied amount of the image removal accelerating liquid was increased, and the paper was wound around the liquid applying roller 12 and finally torn.

(Comparative Example 5) Specific Example 4 except that the pressure of the press roller 14 against the liquid application roller 12 was fixed.
A liquid coating apparatus having the same configuration as that of Example 1 was used. Under a room temperature environment, a fixed amount of the image removal accelerating liquid could be uniformly applied to the PPC paper in the same manner as in Example 5. Next, when the temperature of the image removal accelerating liquid is lowered to 5 degrees Celsius, the amount of the liquid removal accelerating liquid applied is reduced, and thereafter, the peeling member is brought into contact with the recording surface of the PPC paper, and the heating and pressurizing treatment is performed. In the image removing process, a peeling failure of the image forming substance occurred.

As described above, the amount of the application liquid held by the liquid application roller 12 changes or the permeation speed of the application liquid transferred from the liquid application roller 12 to the object becomes constant according to the viscosity of the application liquid. By doing so, the amount of the coating liquid applied to the object to be coated 20 can be kept constant.

[0055]

As described above, the present invention detects the viscosity of a coating liquid and controls the amount of the coating liquid on the surface of the liquid coating member based on the detected viscosity of the coating liquid. The amount of the coating solution to be applied can always be kept constant irrespective of the viscosity change due to the temperature change or the like.

Further, since the viscosity of the coating liquid is detected based on the load applied to the liquid coating member by the coating liquid in the coating liquid tank,
The viscosity of the coating liquid can be detected with a simple configuration.

Further, since the viscosity of the coating liquid is detected based on the load applied by the coating liquid when the coating liquid in the coating liquid tank is stirred, the viscosity of the coating liquid can be detected without using a complicated structure.

Further, since the viscosity of the coating liquid is determined based on the temperature of the coating liquid, the viscosity of the coating liquid can be detected with a simpler configuration.

Further, when the viscosity of the coating liquid is high, the amount of the coating liquid on the surface of the liquid coating member is increased, and when the viscosity of the coating liquid is low, the amount of the coating liquid on the surface of the liquid coating member is reduced. Therefore, the amount of the coating liquid applied to the object to be coated can be made constant.

Further, since the amount of the coating liquid to be filled in the concave portion on the surface of the liquid coating member is controlled based on the viscosity of the coating liquid, the amount of the coating liquid applied to the object to be coated can be controlled regardless of the viscosity change due to temperature change or the like. It can always be kept constant.

Further, the moving speed of the liquid application member in the application liquid is controlled based on the viscosity of the application liquid to control the amount of the application liquid to be filled in the concave portion on the surface of the liquid application member. The amount of the coating liquid held by the coating member can be changed.

Further, the amount of the coating liquid on the surface of the liquid coating member is controlled by controlling the distance between the liquid coating member and the liquid amount limiting member based on the viscosity of the coating liquid. The amount can be changed.

Further, the viscosity of the coating liquid is detected, and the time for which the liquid coating member contacts the object to be coated is controlled based on the detected viscosity of the coating liquid. The time that the member contacts the object can be changed,
Control can be performed such that the amount of the coating liquid transferred from the liquid coating member to the object to be coated is constant.

Further, based on the detected viscosity of the coating liquid, the moving speed when the liquid applying member comes into contact with the object to be coated is controlled.
With a simple configuration, it is possible to change the time during which the liquid application member contacts the object to be coated according to the change in the penetration speed of the application liquid.

Further, an image removal accelerating liquid for accelerating removal of a thermoplastic or heat-fusible image forming substance for forming a film-like image from a sheet-like recording material is used as a coating liquid.
Since the image removal accelerating liquid is applied to the recording material before the image forming process, the image forming substance can be accurately removed from the recording material.

The image forming substance is removed by using an image removal accelerating liquid which promotes the removal of a thermoplastic or heat fusible image forming substance which forms a film-like image from a sheet-like recording material as a coating liquid. Since the image removal accelerating liquid is applied to the recording material before the recording, the image forming substance can be accurately removed from the recording material.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a liquid application device.

FIG. 2 is a configuration diagram of a liquid amount control unit that limits a coating liquid at a gap with a liquid coating roller.

FIG. 3 is a configuration diagram of a liquid viscosity detection unit that detects a viscosity from a resistance applied to a liquid application roller.

FIG. 4 is an explanatory diagram illustrating a relationship between a viscosity of a coating liquid and a coating amount.

FIG. 5 is a configuration diagram of a liquid viscosity detection unit that detects a viscosity from a resistance applied to a coating liquid stirring unit.

FIG. 6 is a configuration diagram of a liquid viscosity detection unit that detects a viscosity from a liquid temperature.

FIG. 7 is an explanatory diagram illustrating a relationship between a liquid temperature and a viscosity.

FIG. 8 is a cross-sectional view of a liquid application roller having a concave portion on the surface.

FIG. 9 is a sectional view of a concave portion on the surface of the liquid application roller.

FIG. 10 is a configuration diagram of a liquid application device using a pressing belt.

FIG. 11 is a configuration diagram of a liquid application device having a pressing force control unit.

FIG. 12 is a configuration diagram of a liquid application device using a liquid pumping roller and an application roller.

FIG. 13 is a configuration diagram of a liquid coating apparatus that applies a coating liquid to both surfaces of an object to be coated.

FIG. 14 is a configuration diagram of a liquid application device using a liquid application belt.

FIG. 15 is a configuration diagram of a recording material reproducing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 roll coater 11 coating liquid tank 12 liquid coating roller 121 coating roller driving part 122 concave part 123 liquid pumping roller 124 coating roller 125 tension roller 126 liquid coating belt 13 liquid amount limiting member 131 liquid amount limiting roller 14 pressing roller 141 pressing force control unit 2 Liquid viscosity detecting unit 3 Liquid amount controlling unit 32 Liquid amount limiting roller driving unit 33 Controller 4 Application liquid stirring unit 41 Stirring unit 42 Stirring driving unit 50 Feed unit 60 Image forming substance peeling unit 61 Peeling belt 62 Peeling roller 70 Drying unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G03G 21/00 570 G03G 21/00 570

Claims (12)

[Claims] 1. A coating liquid tank, a liquid coating member, a liquid viscosity detecting section, and a liquid amount control section. The coating liquid tank holds a coating liquid to be supplied to the liquid coating member. The coating liquid is held on the surface, and the held coating liquid is applied to the film-shaped object to be coated. The liquid viscosity detecting section detects the viscosity of the coating liquid, and the liquid amount controlling section detects the coating liquid detected by the liquid viscosity detecting section. A liquid coating apparatus characterized in that the amount of a coating liquid on the surface of a liquid coating member is controlled based on the viscosity of the liquid. 2. The liquid application device according to claim 1, wherein the liquid viscosity detection unit detects the viscosity of the application liquid based on a load applied to the liquid application member by the application liquid in the application liquid tank. 3. A coating liquid stirring section for stirring the coating liquid in the coating liquid tank, wherein the liquid viscosity detecting section detects the coating liquid based on a load applied to the coating liquid stirring section by the coating liquid in the coating liquid tank. The liquid application device according to claim 1, wherein the viscosity is detected. 4. The liquid coating apparatus according to claim 1, wherein the liquid viscosity detecting section obtains the viscosity of the coating liquid based on the liquid temperature of the coating liquid. 5. The liquid amount control section increases the amount of the coating liquid on the surface of the liquid coating member when the viscosity of the coating liquid detected by the liquid viscosity detecting section is high, and adjusts the liquid amount when the viscosity of the coating liquid is low. 2. The liquid coating apparatus according to claim 1, wherein the amount of the coating liquid on the surface of the coating member is reduced so that the amount of the coating liquid applied to the object to be coated is constant. 6. The liquid applying member has on its surface a plurality of recesses for holding a coating liquid to be applied to a film-shaped object to be applied,
The liquid application device according to claim 1, wherein the liquid amount control unit controls the amount of the application liquid to be filled in the concave portion on the surface of the liquid application member based on the viscosity of the application liquid detected by the liquid viscosity detection unit. 7. The liquid amount control section controls the moving speed of the liquid application member in the application liquid based on the viscosity of the application liquid detected by the liquid viscosity detection section to fill the concave portion on the surface of the liquid application member. 7. The liquid application device according to claim 6, wherein the amount of the liquid is controlled. 8. A liquid amount control member for restricting the amount of the coating liquid on the surface of the liquid coating member, wherein the liquid amount control unit and the liquid coating member are based on the viscosity of the coating liquid detected by the liquid viscosity detecting unit. 2. The liquid application device according to claim 1, wherein the amount of the application liquid on the surface of the liquid application member is controlled by controlling an interval between the liquid application member and the amount limiting member. 9. A coating liquid tank, a liquid coating member, a liquid viscosity detecting section, and a liquid amount control section, wherein the coating liquid tank holds a coating liquid to be supplied to the liquid coating member, and the liquid coating member is connected to the coating liquid tank by the coating liquid tank. The coating liquid is held on the surface, and the held coating liquid is applied to the film-shaped object to be coated. The liquid viscosity detecting section detects the viscosity of the coating liquid, and the liquid amount controlling section detects the coating liquid detected by the liquid viscosity detecting section. A liquid coating apparatus, comprising: controlling a time period in which a liquid application member contacts an object to be coated based on a viscosity of the liquid to control a constant amount of the application liquid transferred from the liquid application member to the object to be coated. 10. The liquid amount control unit controls a moving speed of the liquid application member when the liquid application member comes into contact with an object to be coated based on the viscosity of the application liquid detected by the liquid viscosity detection unit. The liquid coating apparatus according to claim 9, wherein the amount of the coating liquid transferred to the object is controlled to be constant. 11. A coating liquid tank containing an image removal accelerating liquid for accelerating removal of a thermoplastic or heat-fusible image forming substance for forming a film-like image from a sheet-shaped recording material as the coating liquid. The liquid coating apparatus according to any one of claims 1 to 10, wherein a recording material before the image forming process is used as the object to be coated, and the image removal accelerating liquid is applied to the recording material before the image forming process. 12. An image removal accelerating liquid for accelerating removal of a thermoplastic or thermofusible image forming substance for forming a film-like image from a sheet-like recording material as the coating liquid is held in a coating liquid tank. The liquid according to any one of claims 1 to 10, wherein a recording material before removing the image forming substance is used as the object to be coated, and the image removal accelerating liquid is applied to the recording material before the image forming substance is removed. Coating device.