JPH0830154A - Recording sheet reproducing device and liquid sticking sheet finishing device - Google Patents

Abstract

PURPOSE:To increase a processing speed owing to the improvement of drying efficiency, by detecting the humidity of a sheet contact member and controlling the operation of a contact member drying means based on the output of the humidity detector. CONSTITUTION:The paper pressing belt 63 is given comparatively strong heating effect from the heating lamp 61a through the transfer paper and the heating drum 61 in the clamping transport area for transporting the transfer paper. However, in the clamping transport area, as the heat from the heating lamp 61a is mainly applied for the vaporization of the liquid sticking to the transfer paper, the paper pressing belt 63 leaves the clamping transport area in a wet state to a certain extent with the liquid soaking from the transfer paper. Accordingly, the humidity detecting sensor 81 for sensing the moisture content of the belt part is provided opposite to the part of the paper pressing belt 63 after leaving the clamping transport area. Moreover, the humidity detecting sensor 82 for sensing the moisture content of the belt part is provided opposite to the part of the paper pressing belt 63 after receiving the drying process with the air flow by the fun 80. Then, the on/off or the intensity of the fun 80 is controlled by applying these signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for recording by removing an image forming substance from a recording sheet on which an image forming substance is adhered on the surface by an image forming apparatus such as a copying machine, a facsimile machine, a printer or a printing machine. The present invention relates to a recording sheet reproducing apparatus that performs at least a liquid application process on a recording sheet to reproduce the sheet, and a liquid-adhesive sheet finishing apparatus that can be used in the reproducing apparatus. The present invention relates to improvement of sheet drying efficiency.

[0002]

2. Description of the Related Art Heretofore, various methods and apparatuses have been known for reproducing a recording sheet by removing an image forming substance such as toner from a recording recording sheet. For example, Japanese Patent Application Laid-Open No. 1-
Japanese Patent Laid-Open No. 101576 discloses a method of removing an image forming substance in which a sheet having toner attached thereto is immersed in a soluble solvent of a toner resin and ultrasonic vibration is applied to release the toner dissolved in the solvent from the surface of the sheet. . Also, Japanese Patent Application Laid-Open No.
No. 0395 discloses that a solvent is attached to a printed portion of waste paper by a method such as dipping, spraying or coating to dissolve the toner, and the dissolved toner is washed, air suction, contact with an adsorbent,
An image forming substance removing method is disclosed in which the image forming substance is removed by a method such as mechanical peeling or electrostatic adsorption.

Further, the applicant of the present invention previously applied to a recorded recording sheet, water as a destabilizing agent, an aqueous solution containing a surfactant, an aqueous solution containing a water-soluble polymer, and a surfactant and a water-soluble polymer. Containing at least one kind of water or aqueous solution selected from the group consisting of aqueous solutions containing, and interposing a peeling member, heat-bonding or pressure-bonding the image-forming substance to the peeling member to peel it from the recording sheet. A method for removing the image forming substance has been proposed (for example, Japanese Patent Application No. 4-2
55916). According to this, only the image forming substance can be removed without relatively damaging the paper quality of the recording sheet.

[0004]

As described above, in order to remove the image-forming substance from the recording sheet having the image-forming substance adhered to the surface thereof and regenerate the recording sheet, at least a liquid application process is applied to the recording sheet. In the case of carrying out, for convenience of handling after reproduction, it is desirable to remove the liquid adhering to the recording sheet and dry the recording sheet after removing the image-forming substance.

Therefore, the present applicant has previously applied a liquid to a recording sheet having an image-forming substance adhered to the surface thereof to provide a destabilizing liquid that makes the adhesion between the surface and the image-forming substance unstable. The destabilizing liquid applying means for contacting the peeling body having a larger adhesion to the image forming substance than the surface to the image forming substance on the surface, and then separating the surface from the peeling body. It has also been proposed to provide a means for drying the recording sheet after peeling off the image-forming substance in the recording sheet reproducing apparatus having the image-forming substance peeling means (for example, Japanese Patent Application No.
269873).

However, subsequent studies have revealed that the improvement of the drying efficiency of the above-mentioned drying means is indispensable in order to improve the recording sheet reproduction processing speed. Such a drying means is also effective in the regenerating apparatus using the above-mentioned solvent, and similarly, it is considered that improving the drying efficiency of the drying means is effective for improving the regeneration processing speed.

The present invention has been made in view of the above problems, and an object of the present invention is to use a recording sheet reproducing apparatus and a reproducing apparatus for the recording sheet which can improve processing speed by improving drying efficiency. It is an object of the present invention to provide a liquid deposition sheet finishing device.

[0008]

In order to achieve the above object, the invention of claim 1 is to reproduce the recording sheet by removing the image forming substance from the recording sheet having the image forming substance adhered to the surface thereof. In a recording sheet reproducing apparatus for performing at least a liquid application process on a recording sheet, a sheet drying means for drying the recording sheet in a state where the image forming substance is removed and the liquid remains adhered, and the surface is Sheet contact member that is driven to move endlessly in a closed path including a region that contacts the recording sheet, contact member drying means that dries the sheet contact member, and humidity of the sheet contact member is detected. A finishing device having a humidity detecting means and a controlling means for controlling the operation of the drying means based on the output of the humidity detecting means is provided.

According to a second aspect of the present invention, the recording sheet is subjected to at least a liquid application process in order to reproduce the recording sheet by removing the image forming substance from the recording sheet having the image forming substance adhered on the surface thereof. In the reproducing apparatus, the sheet drying means for drying the recording sheet in a state in which the image forming substance is removed and the liquid adhered thereto, and the surface inside the closed path including the region in contact with the recording sheet in the state. A finishing device having a sheet contact member that is driven to move endlessly with a contact member and a contact member drying unit that dries the sheet contact member by generating an airflow in a direction along the surface of the sheet contact member. It is a feature.

According to a third aspect of the present invention, in the recording sheet reproducing apparatus according to the second aspect, the contact member drying means is provided at each of a plurality of locations along the path, and faces the contact member surface. It is characterized by comprising a duct having an open portion and an air flow generating means for generating an air flow in the duct.

According to a fourth aspect of the present invention, in the recording sheet reproducing apparatus according to the third aspect, the ducts respectively arranged at the plurality of positions are sequentially and selectively moved along with the movement of the surfaces of the recording sheet and the sheet contact member. An air flow switching means for generating an air flow is provided in the.

According to a fifth aspect of the present invention, in the reproducing apparatus for a recording sheet according to the first or third aspect, a liquid is applied to the recording sheet having the image forming substance adhered to the surface thereof, and the surface and the image forming substance are separated from each other. A destabilizing liquid applying means for applying a destabilizing liquid for destabilizing the adhesion, and a peeling body having a larger adhesion to the image forming substance than the surface are brought into contact with the image forming substance on the surface. After that, the image forming substance peeling means for separating the surface and the peeling body from each other is provided.

Here, as the destabilizing liquid to be used, it is desirable to use a liquid in which the image forming substance is not dissolved so that the recording sheet is not contaminated due to the dissolution of the image forming substance. For example, since a general electrophotographic toner is hydrophobic, in order to remove the toner, water, an aqueous solution of a surfactant, an aqueous solution containing a surfactant and a water-soluble polymer, or the like is used as the destabilizing liquid. Is desirable.

According to a sixth aspect of the present invention, in the recording sheet reproducing apparatus according to the first or second aspect, an operation switch for switching whether or not to supply electric power from the outside to a predetermined electric component section in the apparatus, and at least the operation switch. A power supply circuit configured to supply electric power to the drive source of the seat contact member in a state where the operation switch is deenergized, and a control for driving the seat contact member after the switch is deenergized. And a device.

According to a seventh aspect of the present invention, in the recording sheet reproducing apparatus according to the sixth aspect, a cooling device for cooling the vicinity of the sheet contact member is provided, and the cooling device is powered at least in the cutoff state. The power supply circuit is configured so as to be able to supply the power, and the control device is configured to operate the cooling device after the power supply is cut off by the switch.

According to an eighth aspect of the present invention, in the recording sheet reproducing apparatus according to the sixth aspect, an exhaust device for exhausting the air around the sheet contact member to the outside of the device is provided, and the exhaust gas is provided at least in the cutoff state. The power supply circuit is configured so as to be able to supply power to the device, and the control device is configured to operate the exhaust device after the energization is cut off by the switch. .

According to a ninth aspect of the present invention, in the recording sheet reproducing apparatus according to the sixth, seventh or eighth aspect, a temperature detector for detecting the temperature in the vicinity of the sheet contact member is provided, and the control device controls the temperature detection. The drive source, the cooling device, or the exhaust device is operated until the temperature detected by the container reaches a predetermined temperature or lower.

According to a tenth aspect of the present invention, in a liquid adhering sheet finishing apparatus, a sheet drying means for drying the sheet to which the liquid adheres and an endless end in a closed path including a region where the surface contacts the sheet in the state. A sheet contact member that is driven to move, a contact member drying unit that dries the sheet contact member, a humidity detection unit that detects the humidity of the sheet contact member, and the drying based on the output of the humidity detection unit. And a control means for controlling the operation of the means.

Here, the sheet contact member in the inventions of claims 1, 2 and 6 can be constituted by a belt member which is endlessly moved by being stretched over a plurality of supporting rollers, or can be constituted by a rotating roller. In any case, it is desirable that at least the surface portion is made of a water-absorbing material.

The sheet drying means and the contact member drying means according to claim 1 or 6 and the sheet drying means according to claim 2 include a drying means using heat or wind, that is, a heating means or an air flow generating means. Can be used for the drying means.

[0021]

According to the invention of claims 1 to 9, at least a liquid application process is performed on the recording sheet in order to remove the image forming substance from the recording sheet having the image forming substance adhered to the surface and reproduce the recording sheet. . Therefore, when the image forming substance is removed, the liquid adheres to the recording sheet and is in a wet state. The recording sheet in this state is brought into contact with the sheet contact member, and desirably, in this contact state, the liquid is evaporated and dried by the sheet drying means.

By thus bringing the sheet contact member into contact with the wet recording sheet, a part of the liquid adhering to the recording sheet is transferred to the sheet contact member to assist drying. If the sheet contact members are provided in pairs so that the sheet contact members come into contact with the front and back surfaces of the recording sheet, and preferably press the recording sheet in the thickness direction, when the wet sheet is dried, It is possible to suppress the generation of wrinkles that are likely to occur.

Here, the sheet contact member comes into contact with a wet recording sheet, and a certain amount of liquid is transferred from the recording sheet to a wet state. This wet sheet contacting member, when the movement path of its surface is set so that it can be subjected to the drying action by the above-mentioned sheet drying means for drying the recording sheet, the drying action by this is performed. receive. However, also in this case, the higher the sheet reproduction processing speed of the apparatus is set, the less the drying action received from the sheet drying means becomes, and the sheet contact member is not sufficiently dried. If the sheet contact member comes into contact with the recording sheet in an insufficiently dried state as described above, it is possible to transfer a part of the liquid adhering to the recording sheet to the sheet contact member to assist the drying as described above. You can't do it enough.

Therefore, a contact member drying means for drying the sheet contact member is provided to evaporate the liquid transferred from the recording sheet to dry the sheet contact member. As a result, the sheet contact member sufficiently exhibits the function of assisting the drying of the recording sheet.

Particularly, in the invention of claim 1, the humidity of the sheet contact member is detected by the humidity detecting means, and the operation of the contact member drying means is controlled by the control means based on the output. For example, the contact member drying means is operated only when it is detected that the humidity of the sheet contact member has increased to a certain extent that the recording sheet may be insufficiently dried, or the contact member is dried depending on the detected humidity level. Change the drying capacity of the means.

Further, in the invention of claim 2, the contact member drying means dries the sheet contact member by generating an air flow along the surface of the sheet contact member. By the air flow in the direction along the surface of the sheet contact member generated by the contact member drying means, the vapor of the liquid evaporated from the surface of the sheet contact member is smoothly carried away from the vicinity of the surface as compared with the air flow in the direction of hitting the surface. .

According to the third aspect of the invention, in the recording sheet reproducing apparatus of the second aspect, the duct having the sheet contact member facing portion, which constitutes the contact member drying means, is provided on the surface of the sheet contact member. It is installed at a plurality of locations along the moving route. The specific disposition position can be determined in consideration of the drying efficiency for the sheet contact member and the restrictions on the device layout. Then, an air flow is generated in the duct by the air flow generating means, the vapor of the liquid evaporated from the sheet contact member is taken into the duct through the opening, and is carried away by the air flow.

Further, in the invention of claim 4 in particular, in the reproducing apparatus of the recording sheet of claim 3, the air flow switching means arranges the recording sheet and the sheet contact member respectively at the plurality of positions as the surfaces move. The airflow is selectively and sequentially generated in the ducts, and the airflow is concentrated on the duct having the greatest immediate effect on the acceleration of the drying of the recording sheet by drying the sheet contact member at each time point.

Further, in a fifth aspect of the invention, in the recording sheet reproducing apparatus of the first or third aspect, a destabilizing liquid is applied to the surface of the recording sheet on which the image-forming substance is attached, and And the image-forming substance are made unstable, and a predetermined peeling body is brought into contact with the image-forming substance on the surface to adhere the image-forming substance to the peeling body surface, and then the image-forming substance is removed. The peeling body and the surface of the recording sheet are separated from each other while being attached to the peeling body, and the image forming substance is peeled and removed from the surface.

Particularly, in the inventions of claims 6 to 9, the operation switch for switching whether or not to supply electric power from the outside to a predetermined electric component part in the apparatus is operated by the operator to cut off the supply of electric power. It prevents the occurrence of various problems that occur in the case of

That is, if the energization is interrupted by the operation of the operation switch and the driving of the seat contact member is stopped, there is a possibility that the seat contact member may be locally deformed or deteriorated. The causes of this local deformation and deterioration are as follows. When a heater is used as the sheet drying means, when the energization is cut off by the operation switch, the heating by the heater is also stopped, and the temperature of itself decreases rapidly. However, since the members around the heater have a relatively large heat capacity, once the temperature becomes high, the temperature does not immediately drop even if the heating of the heater is stopped. For this reason, when the energization is cut off by the operation of the operation switch immediately after the end of the recording sheet reproducing operation of the apparatus, a part of the sheet contact member that comes in contact with or close to the member around the heater is heated for a long time. Then, this part is locally deformed or deteriorated.

In addition, a large amount of liquid vapor removed from the recording sheet is contained around the sheet drying means. Therefore, if the device is left unused for a long time after the power supply is cut off by operating the operation switch, the vapor in the device becomes droplets and adheres to the sheet contact member (hereinafter, dew condensation). That). The liquid droplets attached to the sheet contact member due to the dew condensation may cause a defect such as a partial drying failure of the recording sheet from which the image forming substance is removed, when the apparatus is subsequently used. Incidentally, this type of recording sheet reproducing apparatus has a high possibility of performing the reproducing process at midnight or in an unmanned place due to its nature. Therefore, the upper operation switch is not frequently turned on and off, and once turned on, the erase operation is performed, and after the end, the upper operation switch is likely to not be turned on again until the next day. Therefore, it is important to take measures against the condensation of the liquid that is left for a long time.

Therefore, in the invention of claim 6, after the energization is cut off by the operation switch, electric power is supplied from the power supply circuit capable of supplying electric power to the driving source of the seat contact member even in this cutoff state, and the seat contact is made. The control device controls to drive the member. As a result, the entire surface of the sheet contact member receives the heat supplied from the high temperature portion (heat radiation from the high temperature portion) uniformly so that only a part of the sheet contact member is not exposed to the high temperature portion in the device. Prevents local deformation and deterioration.

Further, in the invention of claim 7, after power is cut off by the operation switch, power is also supplied from the power supply circuit to a cooling device for cooling the seat contact member to operate the cooling device. As described above, control is performed by the control device. As a result, the temperature of the high temperature portion in the vicinity of the sheet contact member can be quickly reduced, and the driving of the sheet contact member for preventing local deformation and deterioration of the sheet contact member can be performed in a relatively short time. To

Further, in the invention of claim 8, after the energization is cut off by the operation switch, power is also supplied from the power supply circuit to the exhaust device for discharging the air around the seat contact member to the outside of the device. Then, the control device controls the exhaust device to operate. As a result, the air around the sheet contact member is replaced to prevent dew condensation.

Further, in the invention of claim 9, the temperature detected by the temperature detector after the energization is cut off by the operation switch is locally deformed or deteriorated in the sheet contact member, or dew condensation is caused. The control device controls the drive source, the cooling device, or the exhaust device to operate until the temperature becomes equal to or lower than a predetermined temperature at which there is no dripping. This makes it possible to minimize the operating time of these. Here, regarding condensation,
The degree of temperature decrease in the device is used as the degree of progress of air replacement by the discharge device. Further, if the detected temperature at the time when the energization is cut off by the operation switch is equal to or lower than the predetermined temperature, these may not be operated. For example, the exhaust device may be operated for a predetermined time.

As the contact member drying means, one that can also serve as the cooling device of claim 7 and the exhaust device of claim 8 can be used.

In the tenth aspect of the present invention, the sheet to which the liquid is attached is brought into contact with the sheet contact member, and in this contact state, the liquid is evaporated and dried by the sheet drying means. Due to the contact with the sheet contact member, a part of the liquid adhering to the recording sheet in a wet state is transferred to the sheet contact member to assist the drying. If the sheet contact member is brought into contact with each of the front and back surfaces of the sheet, preferably by pressing the sheet in the thickness direction, by sandwiching the sheets, wrinkles that easily occur when a wet sheet is dried are generated. Can be suppressed.

Then, the liquid of the sheet contact member transferred from the sheet is evaporated by the contact member drying means to dry the sheet contact member. As a result, the sheet contact member sufficiently exhibits the above-mentioned function of assisting the drying of the sheet.

The operation of the contact member drying means is controlled based on the output of the humidity detecting means for detecting the humidity of the sheet contact member by the control means. For example, the contact member drying means is operated only when it is detected that the humidity of the sheet contact member has increased to a certain extent that the drying of the sheet is insufficient, or the contact member drying means is operated depending on the detected humidity level. Change the drying capacity.

[0041]

EXAMPLES In the following, according to the present invention, from a transfer paper as an image carrier on which an image is formed by a transfer type electrophotographic copying machine, a hydrophobic and thermo-flexible electrophotographic toner as an image forming substance ( Hereinafter, an embodiment applied to an image forming substance removing device (hereinafter, referred to as a toner removing device) from an image carrier for removing the toner will be described.

First, an outline of an example of a toner removing device to which the present invention can be applied will be described. In FIG. 1, the toner removing device includes a paper feed unit 20 for separating and feeding the transfer papers 10 on which toner images are formed and stored in a stacked state, and a transfer unit 20 for transferring the paper. Paper 1
0, a liquid supply unit 30 for supplying a liquid, a toner peeling unit 40 as a peeling means for peeling the toner from the transfer paper 10 to which the liquid is supplied, and the transfer paper 1 from which the toner has been removed.
Drying unit 60 as a finishing device for drying 0
And a paper receiving unit 70 for receiving the transfer paper 10 discharged from the drying unit 60.

The sheet feeding unit 20 feeds the transfer sheet 10 stacked on the sheet feeding table 21 from the bottom side with the surface on which the toner image is formed (hereinafter referred to as the toner image surface) facing downward. The roller 22 feeds the sheet, the separation roller pair 23 separates the multi-fed sheet, and only one sheet of the transfer sheet 10 is sent out by the sheet feeding / conveying roller pair 24. The specific configuration and operation are the same as those of the paper feeding mechanism in the electrophotographic copying machine, and therefore detailed description will be omitted.

The liquid supply unit 30 supplies the transfer paper 10 with a liquid 31 such as water or an aqueous solution containing a surfactant in order to improve the permeability of the transfer paper 10. In the illustrated example, a liquid container 32 for containing the liquid, and a coating roller provided so as to be partially submerged in the liquid in the liquid container 32 and pumping the liquid by rotation to supply it to the toner image surface of the transfer paper 10. 33, and a regulation roller 34 as a paper regulation member provided so as to face the coating roller 33 with the paper conveyance path interposed therebetween. This coating roller 33
As the material, a material having a liquid retaining property, for example, a roller made of a hydrophilic porous material, sponge, or a roller made of an elastic body such as rubber or a rigid body such as metal can be used.

In the liquid supply unit 30, the first transfer paper 10 sent from the paper supply unit 20 is guided to a portion (hereinafter, referred to as a liquid supply portion) facing the application roller 33 and the regulation roller 34. A paper guide mechanism 35 and a second paper guide mechanism 36 for guiding the transfer paper 10 that has passed through the liquid supply unit to the toner peeling unit 40 side are provided.

The toner peeling unit 40 includes a plurality of belt supporting rollers (hereinafter referred to as supporting rollers) 41, 4.
A toner offset belt (hereinafter referred to as an offset belt) 44 as a peeling belt wound around 2, 43
And upper and lower heating rollers 45, 46 with built-in heating lamps 45a, 46a provided so as to press each other with the offset belt 44 interposed therebetween, and a belt cleaning device 47 for removing toner from the surface of the offset belt 44. . At least the surface of the offset belt 44 is made of a material having a larger adhesive force to the softened toner than the adhesive force between the surface of the transfer paper 10 and the toner. For example, the belt itself is made of a metal material such as an aluminum-based material, a copper-based material, a nickel-based material, or a polymer-based material such as polyethylene terephthalate (PET) in which titanium oxide is dispersed.

Of the supporting rollers for supporting the offset belt 44, the belt around the supporting roller (hereinafter referred to as a separation roller) 43 around which the belt portion after passing through the pressing portions of the upper and lower heating rollers 45, 46 is wound. Of the transfer paper 1 from the offset belt 44 by rapidly changing the moving direction of the
A curvature separation of 0 is performed. In addition, a guide roller 48 for increasing the change in the moving direction of the belt.
A tension roller 49 is also provided.

The upper and lower heating rollers 45 and 46 are
The toner image surface of the transfer paper 10 is brought into close contact with the offset belt 44, and the toner fixed to the transfer paper 10 is heated and softened.

Further, the belt cleaning device 47
Is a rotating brush roller 50 that applies intermittent scratching force to the circumferential surface of the offset belt 44 to remove the adhered toner.
And a pad 51 on the downstream side of the rotating brush roller 50 in the belt moving direction to remove the adhered toner by scrubbing by the frictional force by contacting with the peripheral surface of the belt. It is adapted to be housed in the casing 52.

Further, the toner peeling unit 40 includes
Transfer paper 10 sent from liquid supply unit 30 side,
There are also provided a pair of relay conveyance rollers 53 as a holding conveyance means for advancing into the pressurizing section, and an upper and lower guide member 54 for guiding the transfer paper 10 having the curvature separated from the offset belt 44 to the drying unit 60 side.

The drying unit 60 is, for example, the transfer paper 1
The transfer paper 10 is dried so that the liquid holding amount of 0 is 10% or less of the paper weight, and the transfer paper 10 is wound around the heating drum 61 with a built-in heating lamp 61a and made of, for example, aluminum, and a plurality of support rollers 62. A paper pressing belt 63 that moves endlessly while being wound around the peripheral surface of the heating drum 61 at a constant angle.
It consists of and. In the illustrated example, one support roller 62 also serves as a tension roller. As the material of the paper pressing belt 63, a material having heat resistance and air permeability, for example, cloth such as canvas cloth, cotton cloth, and Tetoron cloth can be used.

Further, in the drying unit 60, an upper and lower guide member 64 for guiding the transfer paper 10 that has passed through the holding region between the heating drum and the paper pressing belt, and a paper receiver for the transfer paper 10 guided thereby. A paper discharge roller pair 65 for discharging paper is provided on the paper receiving surface of the unit 70.

In the above structure, the transfer paper 10 sent from the paper supply unit 20 is supplied with the liquid uniformly on the toner image surface by the liquid supply unit 30, and the toner peeling unit 4
Sent to 0. In the toner peeling unit 40, the toner adhered to the transfer paper 10 is softened by heating from the heating rollers 45 and 46 and adheres to the surface of the offset belt 44. When separating the transfer paper 10 and the offset belt 44 around the separation roller 43, the offset belt 4
The toner adhering to the surface is separated from the transfer paper 10, and the toner is removed from the transfer paper 10. The transfer paper 10 from which the toner has been removed is dried by the drying unit 61,
The paper is discharged to the paper receiving unit 70.

According to the above construction, the liquid is supplied to the transfer paper 10 to which the toner adheres, and the toner is peeled off while the liquid permeates into the interface of the transfer paper 10 with the toner, so that the paper fiber is damaged. The toner can be removed without

Further, since the paper pressing belt 63 having water absorbability is brought into contact with the transfer paper 10 in the drying unit 61, in addition to the drying by heating from the heating lamp 61a inside the heating drum 61, the paper pressing belt 63 is pressed. It is also possible to exert a drying promoting function by adhering the liquid 31 of the transfer paper 10 to the belt 61 for use.

By the way, in the toner removing apparatus of FIG. 1, the heating drum 61 and the paper pressing belt 63 of the drying unit 60 are sheet contact members that come into contact with the transfer paper 10 in a wet state. Of these, since the heating drum 61 has the heating lamp 61a therein, the heating lamp 61a corresponding to a drying unit for the transfer paper 10 is constantly subjected to the drying operation by heating.

On the other hand, the paper pressing belt 63 is the transfer paper 1
In the holding and conveying area for 0 conveyance, the heating lamp 61a receives a relatively strong heating action via the transfer paper 10 and the heating drum 61. In this holding and conveying area, the heat from the heating lamp 61a is mainly transferred. Liquid 31 adhering to the paper 10
Therefore, the paper pressing belt 63 leaves the holding and conveying region while being wet to some extent with the liquid 31 transferred from the transfer paper 10. And this paper pressing belt 6
The wetness of 3 is alleviated to some extent by evaporating the liquid 31 adhering to it by direct contact with the heating drum 61 when the transfer paper 10 is not present in the holding and conveying region with the heating drum 61. However, when the processing speed of toner removal is set earlier or the wet transfer paper 10 is continuously fed at a predetermined interval (time interval or space interval) to the holding and conveying area, it is necessary to press the paper. There is a possibility that the portion of the belt 63 may move to the sandwiching and conveying area again in a wet state, and the above-mentioned drying promoting function may not be exerted.

An example of the construction of the drying unit 60 for eliminating such a problem due to the wetting of the paper pressing belt 63 will be described below with reference to FIG. In FIG. 2, the drying unit 60 is provided with a fan 80 as a paper sheet contact member drying means for drying the paper pressing belt 63, which generates a gas flow for removing the vapor of the liquid adhering to the paper pressing belt 63 from the belt 63. Has been. In the example of FIG. 2, unlike the drying unit 60 of FIG. 1, the transfer paper from the toner peeling unit 40 is introduced from above into the sandwiching and conveying area, which is the pressure contact portion between the paper pressing belt 63 and the heating drum 61. After passing through the area, it is configured to be discharged from below, and in order to prevent the transfer paper from being separated from the heating drum 61 and jamming without being separated at the time of discharging, the leading end contacts or approaches the drum 61. To separate claws 6
6 is provided. Further, the paper pressing belt 63 is made of a material having an excellent water absorbing property, such as cotton and silk, which is suitable for exhibiting the above-mentioned drying promoting function.

In order to operate the fan 80 efficiently, a humidity detecting sensor 81 is provided opposite to the portion of the paper pressing belt 63 that has left the holding and conveying area to know the water content of the belt portion. Has been. Further, a humidity detecting sensor 82 is provided opposite to the portion of the paper pressing belt 63 that has been subjected to the drying process by the air flow by the fan 80 to know the water content of the belt portion. Only one of these humidity detection sensors 81 and 82 may be provided, or both of them may be provided. Then, using these signals, the on / off or intensity of the fan 80 is controlled. FIG. 3 is a block diagram of an electric component section for that purpose. In the example of FIG. 3, the drive motor 20 of the paper feeding unit
The signals from the humidity sensors 81 and 82 are input to the CPU 83 that controls the drive motor 30a of the liquid supply unit 30 and the like, and the control signal from the CPU 83 is output to the fan 80. ing.

Here, there is a high possibility that moisture is left in the portion of the paper pressing belt 63 that has undergone the drying process by the fan 80 to the extent that it interferes with the drying of the transfer paper in the sandwiched conveyance area. For example, in the case of detection by a signal from a humidity sensor 82 arranged so as to face the belt portion, in order to avoid problems due to defective transfer paper drying, for example, stack defects in the paper receiving unit 70, It is desirable to perform the control as shown in FIG.

For example, in the control of FIG. 4A, the transfer speed of the transfer paper in the apparatus is switched as necessary in order to avoid the above-mentioned problems. First, when the output T of the humidity sensor 82 is read, and this is compared with a set value a ₁ for determining whether the above-mentioned trouble may occur, as a result, it is determined that the above-mentioned trouble may occur ( At step 2), the transfer speed of the transfer paper in the apparatus is switched from the normal speed V ₁ to a lower speed V ₂ which is lower than the normal speed V ₁ (step 3). The reading of the output T of the humidity sensor 82 and the switching of the speed are performed at any time, and at the time when it is determined that there is no risk of malfunction (N in step 3), the normal speed V ₁
(Step 4).

The control shown in FIG. 4 (b) has the same purpose.
The paper feed interval of the paper feed unit 20 is switched. That is, the output T of the humidity sensor 82 and the set value a
If it is judged that the above-mentioned trouble may occur by comparison with ₁ , the sheet feeding interval by the sheet feeding unit 20 is changed from the regular interval L ₁ to a larger interval L ₂ than this.
(Step 3). Then, as in the case of FIG. 4A, when the output T of the humidity sensor 82 determines that there is no risk of failure (N in step 3), the normal interval L ₁ is restored (step 4).

Further, the control of FIG. 4 (c) has the same purpose, and when it is judged that the above-mentioned trouble may occur (step 2).
In Y), the toner removing operation including the paper feeding operation is stopped (step 3), and at the same time, the notifying means such as a liquid crystal display provided in the operation unit (not shown) is driven to drive the paper pressing belt. Toner that automatically starts the paper feeding operation at the time when it is determined that the water content of 63 has decreased in the standby state and the water content has decreased to the extent that the above-mentioned trouble does not occur (N in step 2). The removal operation is restarted (step 4). In the standby state, the drying unit 40 and the fan 80 may be driven to dry the paper pressing belt 63. In addition, this FIG.
The control shown in (c) is simpler than the control shown in FIGS. 4 (a) and 4 (b). Of course, this Figure 4
The control of (c) may be performed in combination with the control of FIG. 4 (a) or FIG. 4 (b).

Next, the paper pressing belt 63 will be described with reference to FIG.
Another example of the configuration of the drying means for use will be described. Figure 5
In the configuration example of (a), the heater 80a, 80a, 80b is used to configure a belt drying unit. Specifically, the heaters 80a, 80a are built in the support rollers 62, 62 of the paper pressing belt 63, and the paper pressing belt 63 is
A heater 80b is provided so as to face the portion of the holding and conveying area that has been removed. These heaters 80a, 80
The paper pressing bell and 63 are dried by a and 80b. Also in this configuration example, the humidity sensors 81 and 82 may be provided to control the drive of the heater.

On the other hand, in the configuration example of FIG. 5 (b), the belt device 80c for rotating the belt made of a water absorbent material, preferably a water absorbent material superior to the material of the paper pressing belt 63 is used to press the paper. The paper pressing belt 63 is arranged so as to come into contact with the portion of the belt 63 for removing the holding and conveying area.
It constitutes a drying means for. The belt of the belt 80 may be rotated together with the paper pressing belt 63, or may be separately driven.

Next, another structural example of the drying means for the paper pressing belt 63 will be described with reference to FIG. In this configuration example, an air flow in a direction along the surface of the paper pressing belt 63 is generated to dry the paper pressing belt 63.
In the illustrated example, a blower fan 90 that sends air from one outer side in the width direction of the paper pressing belt 63 to the paper pressing belt 63 side is provided, and the air on the paper pressing belt 63 side is sucked to the other outside. An exhaust fan 91 for sending air out of the machine is provided. The blower fan 90 is arranged inside an exterior cover of an apparatus (not shown) so that the air can be sucked from the side of the toner peeling unit 40 in which the ambient air has a high temperature. These fans 9
An air flow as indicated by an arrow in the figure is generated by 0 and 91 to dry the paper pressing belt 63. A plurality of the fans 90 and 91 may be provided. Further, in the illustrated example, for the purpose of concentrating the airflow generated by both fans 90 and 91 on the surface running area of the paper pressing belt 63, the cover 92 is provided so as to surround the periphery of the drying unit except both side end portions. It is provided. Although not shown, of course, the cover 92 has openings for injecting the transfer paper from the toner peeling unit 40 to the drying unit and for discharging the transfer paper to the paper receiving unit.

7 and 8 show ducts provided in order to more efficiently use the airflow generated by the blower fan 90 and the exhaust fan 91 for drying the paper pressing belt 63. Is a plan view and FIG. 8 is a sectional view taken along line XX in FIG. 7. The duct includes a first duct portion 93 extending in the width direction so as to face the back surface side of the paper pressing belt 63 in the holding and conveying area, and the front surface side of the paper pressing belt 63 immediately after leaving the holding and conveying area. A second duct portion 94 that extends in the width direction so as to face the first duct portion 95, and a third duct portion 95 that extends to face the belt surface side on the downstream side in the moving direction of the surface of the belt 63. These duct parts 93, 94 and 95 are shown in FIG.
As shown in FIG. 5, the portion facing the surface of the belt 63 is an opening. The blower fan 9 of the first to third duct portions
Both of the 0-side end portions are connected to the blower fan 90 by the connecting duct portion 97, and the end portions of the first to third duct portions on the exhaust fan 91 side are also connected by the connecting duct portion 98 to the blower fan 91.
It is connected to. A shutter 9 for opening and closing the inlet is provided at the inlet of the first to third ducts on the side of the blower fan 90.
3a, 94a and 95a are provided. Similar shutters may be provided at the outlet instead of the inlet, or both may be provided.

Each of the shutters 93a, 94a, 95a
In accordance with the movement of the transfer paper and the surface of the paper pressing belt 9 among the first to third duct parts, the air current is concentrated on one or a plurality of duct parts where the facing belt 9 part needs to be particularly dried. It is for distribution. FIG. 9 shows each shutter 9
It shows an example of 3a, 94a, 95a opening and closing control. FIG. 9A shows a heating drum 91 and a paper pressing belt 6.
The state immediately after the leading edge of the paper is detected by the paper sensor 99 that detects the transfer sheet 10 conveyed toward the holding and conveying area of the transfer sheet 3 in FIG. 9B. 9 (c) is a state at the moment of being gripped, and FIG. 9 (c) is a state at the moment when the leading edge of the transfer sheet 10 reaches the exit of the sandwiched conveyance area, and FIG. The states at the moment of passing the facing portion of 91 are respectively shown. FIG. 9E is a timing chart showing the output of the paper sensor and the open / close state of each shutter as the transfer paper passes.

In FIG. 9E, the clock of the CPU is counted from the time (t ₀ ) when the leading edge of the transfer paper 10 is detected by the paper sensor 99 and its output is turned on, and thereafter, the count becomes a predetermined count. Each shutter is opened and closed at a predetermined time. First, at the count (t ₁ ) corresponding to FIG. 9B, only the shutter of the first duct portion 93 is opened to generate the airflow in the first duct portion 93. Next, FIG.
The shutter of the second duct portion 94 is also opened at the count (t ₂ ) corresponding to the above, and the air flow is also distributed to the second duct portion 94.
Next, the shutter of the first duct portion 93 is closed and the shutter of the third duct portion 95 is opened at the count (t ₃ ) at which the rear end portion of the transfer paper 10 passes through the exit of the holding and conveying area. Then, the shutter of the second duct portion 94 is closed at the count (t ₄ ) corresponding to FIG. After this, at least the portion of the paper pressing belt 9 that the transfer paper 10 was in contact with (see FIG. 9).
The shutter of the third duct part 95 is kept open until the rear end of the third duct part 95 passes through the facing part of the third duct part 95 (d), and then it is closed. Then, when the leading edge of the next recording paper 10 is detected by the paper sensor 99, the shutter of the first duct portion 93 is opened again. Thereafter, each shutter is similarly controlled to be opened and closed.

In the configuration example of FIG. 7 and FIG. 8, the first to third
Both ends of the duct part of the common connecting duct part 9
Common blower fan 90 and exhaust fan 9 through 7,98
Although each of the ducts is also used as the fan, at least one of the blower fan and the exhaust fan may be provided for each duct portion. In this case, if the fan provided for each duct section is ON / OFF controlled similarly to the above-mentioned shutter, it is possible to intensively use the airflow accompanying the movement of the transfer sheet or the like as in FIG.

In each of the drying units 60 shown in FIGS. 1, 2, 5 and 6 to 8, in order to further accelerate the drying of the paper pressing belt 63, the supporting roller 62 shown in FIG. As shown in FIG. 11, a groove 62a serving as an escape route for moist air is formed on the front surface portion of the belt 63 that contacts the back surface of the belt 63.
It is desirable to use a roller formed with. That is, in the supporting roller 62 whose perspective view is shown in FIG. 10A and its front view is shown in FIG. 10B, a plurality of annular grooves 62 a are formed in the roller axial direction, and contact with the back surface of the belt 63. A plurality of portions 62b are arranged in the roller axial direction to form a disc shape. Accordingly, even when the belt 63 is supported, the moist air can escape from the groove 62a, and the drying of the belt 63 can be promoted.

The support roller 62, the front view of which is shown in FIG.
The contact portion 62b with the back surface of the is a spiral ridge. In addition, in the illustrated example, the spiral groove 62a is configured so that the rotation of the roller 62 allows the moist air to be forced out from the center of the roller axial direction toward the end as indicated by the arrow A in the figure. The spiral winding direction is reversed with the axial center in between.

The support roller 62 shown in FIGS. 10 and 11 is used.
In order to further accelerate the drying of the paper pressing belt 63, for example, as shown in FIG. 12A using the support roller of FIG. 10 as an example, a contact portion 62b with the back surface of the belt 63 is used. A through hole 62c in the roller axis direction may be provided in the roller, or a radial fin 62d may be provided at the bottom of the groove 62a as shown in FIG. 12B. If the through holes 62c and the radial fins 62d are provided, it is possible to further accelerate the drying of the belt 63 by agitating the moist air with the rotation of the supporting roller as the supporting roller rotates.

Next, a toner removing device according to another embodiment of the present invention will be described with reference to FIGS. 13 and 14.
FIG. 13 is a schematic configuration diagram of a toner peeling unit and a drying unit of the toner removing device according to this embodiment. This toner removing device basically has the same configuration as the above-described toner removing device of FIG. 1, except that the offset belt 44 slides instead of the lower heating roller 46 in the toner peeling unit. The only difference is that the heating block 100 is used. A heater 100 is provided in the heating block 100.
a is built in and has the same function as the lower heating roller 46.

In the toner removing device of this embodiment,
Fans 102 and 10 for generating a widthwise air flow in the toner peeling unit and the drying unit, respectively.
4 are provided. Fan 10 of toner peeling unit
Reference numeral 2 is a fan for cooling the offset belt, and the fan 104 of the drying unit is
Similar to the above-mentioned embodiment, it functions as a paper sheet contact member drying means for drying the paper pressing belt 63. And
In the present embodiment, the fan 104 of the drying unit and the drive motor for the paper pressing belt 63 are turned off by operating the main switch as an operation switch (hereinafter,
After the main switch is cut off), it is designed to be able to continue to operate. In addition, in FIG. 13, the heating block 1
A temperature sensor 101 for controlling the heater 100a in the heating block 100 and the heating lamp 45a in the upper heating roller 45 is provided near 00.
A temperature sensor 1 is provided near the paper pressing belt 63 for control after the main switch is cut off, which will be described later.
It is 03.

FIG. 14 is a block diagram of the electrical equipment section of the toner removing device of this embodiment. In this embodiment, a DC power supply (DC power supply) 112 is provided closer to the external power supply (commercial power supply) than the main switch 111. Then, even in the state where the main switch is cut off and the power supply to the alternating current system such as the heating lamps 45a and 61a and the heater 100a is cut off, the DC power source 112 causes the main control unit 113, the driver 114, and the sensitivity sensor of the drying unit. 103, the motor M1 for driving the paper pressing belt, the fans 102 and 104 of the toner peeling unit and the drying unit, and the like can be energized, and the main control unit 1 can be energized.
It can be controlled by 13.

Specifically, the main controller 113 is connected to the DC power supply 112, and the main controller 113 is connected to the main controller 113.
A relay 115 as a detection unit for detecting ON / OFF of the main switch 111, a temperature sensor 103 of the drying unit, a driver 114, etc. are connected to the.
The solid state relays SSR1 (117) and SSR2 (116), the fans 102 and 104 of each unit, the motors M1 and M2 for driving the paper pressing belt, etc. are connected to the driver 114.

In the above configuration, during the toner removing operation, the temperature sensor 103 of the drying unit detects the surface temperature of the paper pressing belt 63 and controls the solid state relay SSR2 to be turned on and off, thereby heating the lamp 61a. Is controlled to keep the temperature of the belt 63 constant. Further, by turning on the motor M2, the paper pressing belt 63 and the heating drum 61 are rotated. (Hereinafter, margin)

Then, when the main switch 111 is turned off when the paper pressing belt 63 is at a high temperature, such as during the toner removing operation or immediately after the completion of the operation, the power supply to the heating lamp and the heater is cut off. And the main controller 1
13 is the main switch 111 due to the relay 115.
Is turned off, and the temperature of the surface of the paper pressing belt 63 is detected by the temperature sensor 103 of the drying unit. Then, when the detected temperature is equal to or higher than the predetermined temperature, the drive motor M2 and the fan 104 of the drying unit are turned on, and these are continuously driven. As a result, the heat from the heating drum 61 related to the paper pressing belt 63 is equalized. Further, the fan 104 is driven to circulate the outside air to cool the paper pressing belt 63, and at the same time, the liquid vapor in the machine is discharged to the outside of the machine. Here, the predetermined temperature is an upper limit temperature in a range in which the paper pressing belt 63 is deformed or deteriorated by heat from the heating drum 61.

By the above control, when the paper pressing belt 63 is at a high temperature immediately after the toner removing operation, the main switch 1
When 11 is cut off, the paper pressing belt 63 rotates, the fan 104 operates to cool the belt 63, and the liquid vapor is discharged out of the machine. It is possible to prevent deformation and deterioration, and to prevent dew condensation when the device is left as it is.

When the paper pressing belt 63 radiates heat sufficiently and the temperature of the belt reaches a predetermined temperature or lower, the rotation of the paper pressing belt 63 and the operation of the fan 104 are stopped.

The paper pressing belt 63 at the time when the main switch 111 is cut off, such as when the power outlet is turned on.
When the temperature is lower than the above predetermined temperature, the paper pressing belt 63 is not rotated and the fan 104 is not operated. Instead, after the main switch is cut off, the paper pressing belt 6
The rotation of 3 and the operation of the fan 104 may be constantly performed.

The fan 104 of the drying unit is also used.
May be operated only when the main switch 111 is shut off, or during the period when the main switch 111 is on and the apparatus is on standby and during the toner removal operation, the discharge of liquid vapor in the machine and the circulation of outside air are prevented. Therefore, it may be driven and continued to operate even after the main switch 111 is cut off. Further, the paper pressing belt 63 after the main switch 111 is cut off
The rotation speed may be the same as the rotation speed during the toner removing operation and during the standby, or may be as low as possible within the range in which the belt 63 does not deteriorate. In addition, the temperature sensor 10
As the elements 1 and 103, a thermoelectric element such as a thermistor or a thermocouple or a temperature detecting element whose resistance value changes with temperature may be used, or a contact point of a motor or a fan may be directly connected with temperature change such as a bimetal switch or a thermal reed switch. Open and close,
A device that can be driven and stopped may be used. Further, a roller having a heating means may be provided inside the paper pressing belt 63 to control the temperature of the belt.

Although the above-described embodiments apply the present invention to the toner removing device for removing the toner as the image forming substance from the ordinary transfer paper 10, the present invention is not limited to this. It can also be applied to an apparatus for removing an image-forming substance from an image carrier, which is composed of a laminate in which a surface layer of a base sheet such as a layer is a material layer having a liquid absorbing property and elasticity such as paper. Further, the drying unit 60 of the above-described embodiment is not limited to the toner removing device and the like, and for example, in order to facilitate the toner removal by the toner removing device, the transfer paper is previously coated with the aqueous solution of the surfactant and then dried. It can also be applied to devices. It can also be applied to a drying device for a sheet to which other liquid is attached.

[0085]

According to the invention of claims 1 to 9, in addition to drying the recording sheet wetted with the liquid for removing the image forming substance by the sheet drying means, Since a part of the liquid of the recording sheet is transferred by contact and the function of promoting the drying of the sheet can be exhibited by drying the sheet contact member by the contact member drying means, such a function can be sufficiently exhibited. The drying efficiency of the recording sheet after removal of the image-forming substance can be markedly improved as compared with the case where the contact member drying means is not provided.

In particular, according to the invention of claim 1, since the operation of the contact member drying means is controlled by the control means based on the output of the humidity detecting means, the contact member drying means can be effectively operated. Therefore, it is possible to prevent wasteful energy consumption due to wasteful operation of the contact member drying means, and poor drying of the recording sheet due to poor drying of the sheet contact member.

Further, according to the second aspect of the invention, since the sheet contact member is dried by generating the air flow in the direction along the surface of the sheet contact member, as compared with the case where the air flow in the direction of hitting the surface is used. The vapor of the liquid evaporated from the surface of the sheet contact member can be smoothly removed from the vicinity of the surface, and the surface of the sheet contact member can be dried relatively uniformly and efficiently.

According to the third aspect of the invention, the ducts forming the contact member drying means and having the sheet contact member facing portions are provided at a plurality of locations along the surface moving path of the sheet contact member. Therefore, an efficient contact member drying means can be configured in consideration of the drying efficiency for the sheet contact member and the restrictions on the device layout. Further, since the air flow for removing the vapor of the liquid evaporated from the sheet contact member is concentrated in the duct having the vapor intake opening, the energy of the air flow generating means can be used efficiently.

According to the invention of claim 4, among the plurality of ducts, the immediate effect on the acceleration of the drying of the recording sheet by the drying of the sheet contact member at each time of the movement of the surface of the recording sheet and the sheet contact member. Since the air flow is concentrated on the largest one, the energy of the air flow generating means can be used more efficiently.

Further, according to the invention of claim 5, the image forming substance is peeled and removed from the surface of the recording sheet by using a predetermined destabilizing liquid and a peeling body, so that the recording sheet is, for example, paper. Even when the surface on which the image forming substance is attached is fibrous, the image forming substance can be removed without relatively damaging the surface and with a simple device configuration. In addition,
In this case, if the recording sheet is sandwiched and provided so as to press the sheet contact member in the thickness direction from both front and back surfaces of the recording sheet, it is possible to suppress the occurrence of wrinkles that are likely to occur when a wet sheet is dried. Not only that, the surface fibers which were somewhat fluffy due to the removal of the image-forming substance can be corrected so that the surface smoothness can be returned to a state close to that before reproduction.

Further, in particular, according to the inventions of claims 6 to 9, after the energization is cut off by the operation switch, the sheet contact member is driven so that only a part of the sheet contact member is not exposed to the high temperature portion in the apparatus. As a result, it is possible to prevent local deformation and deterioration of the sheet contact member.

Further, according to the invention of claim 7, after the energization is cut off by the operation switch, the sheet contact member is cooled by the cooling device to rapidly lower the temperature of the high temperature portion near the sheet contact member. Therefore, driving of the sheet contact member for preventing local deformation and deterioration of the sheet contact member can be performed in a relatively short time. Therefore, power saving and noise reduction can be achieved.

Further, according to the invention of claim 8, the air around the seat contact member is discharged to the outside of the device by the exhaust device after the energization is cut off by the operation switch, and the air around the seat contact member is removed. Since they are replaced, it is possible to prevent droplets from adhering to the sheet member due to dew condensation. Therefore, it is possible to prevent the occurrence of defective drying of the recording sheet when the apparatus is reused thereafter.

Further, according to the invention of claim 9, after the energization is cut off by the operation switch, the sheet contact member is locally deformed or deteriorated, or is kept below a predetermined temperature at which there is no wrinkle such as dew condensation. When this happens, driving of the seat contact member is stopped, so that the operating time can be minimized. Moreover, power saving and noise reduction can be achieved.

According to the tenth aspect of the invention, in addition to drying the sheet to which the liquid is attached by the sheet drying means, a part of the liquid of the recording sheet is transferred by contact with the recording sheet to accelerate the drying of the sheet. Since the sheet contact member capable of exhibiting the above function can be sufficiently exhibited by drying by the contact member drying means, the sheet which is remarkably wet as compared with the case where such contact member drying means is not provided. The drying efficiency of can be improved.

Further, since the control means controls the operation of the contact member drying means based on the output of the humidity detecting means,
The contact member drying means can be effectively operated. Therefore, it is possible to prevent wasteful energy consumption due to useless operation of the contact member drying means, and defective sheet drying due to defective sheet contact member drying.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a toner removing device to which the present invention can be applied.

FIG. 2 is a schematic configuration diagram of a configuration example of a drying unit according to the embodiment.

3 is a block diagram of an electrical unit for controlling the drying unit of FIG.

4A, 4B, and 4C are flowcharts of control examples of the drying unit in FIG.

5A and 5B are schematic configuration diagrams of a drying unit according to another configuration example, respectively.

FIG. 6 is a schematic configuration diagram of a drying unit according to still another configuration example.

FIG. 7 is a schematic configuration diagram of a drying unit according to still another configuration example.

8 is a sectional view taken along line XX in FIG.

9A to 9D are explanatory views of control of the drying unit in FIG. 7. (E) is a timing chart of the same control.

FIG. 10A is a perspective view of a supporting roller according to a modification.
(B) is a front view of the support roller.

FIG. 11 is a front view of a support roller according to another modification.

FIG. 12A is a perspective view of a support roller according to another modification. (B) is sectional drawing of the support roller which concerns on another modification.

FIG. 13 is a schematic configuration diagram of a configuration example of a toner peeling unit and a drying unit according to another embodiment.

FIG. 14 is a block diagram of an electrical component section of the toner removing device according to the embodiment.

[Explanation of symbols]

 10 Transfer Paper 30 Liquid Supply Unit 40 Toner Peeling Unit 44 Offset Belt 45 Upper Heating Roller 46 Lower Heating Roller 60 Drying Unit 61 Heating Drum 62 Paper Pressing Roller 80 Fan 90, 91 Fan 92 Cover 93 First Duct Part 94 Second Duct Part 95 Third Duct Part 101 Temperature Sensor 102 Fan 103 Temperature Sensor 104 Fan

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuo Goto 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (10)

[Claims] 1. A reproducing apparatus for a recording sheet, wherein at least a liquid applying process is performed on the recording sheet to reproduce the recording sheet by removing the image forming material from the recording sheet having the image forming substance adhered to the surface thereof. A sheet drying means for drying the recording sheet in a state where the image forming substance is removed and the liquid remains attached, and a surface for endless movement in a closed path including a region in contact with the recording sheet in the state. Driven by the sheet contact member, a contact member drying means for drying the sheet contact member, a humidity detecting means for detecting the humidity of the sheet contact member, and an operation of the drying means based on the output of the humidity detecting means. A reproducing device for a recording sheet, comprising a finishing device having a control means for controlling the recording sheet. 2. A reproducing apparatus for a recording sheet, wherein at least a liquid applying process is performed on the recording sheet to reproduce the recording sheet by removing the image forming material from the recording sheet having the image forming material adhered on the surface, A sheet drying means for drying the recording sheet in a state where the image forming substance is removed and the liquid remains attached, and a surface for endless movement in a closed path including a region in contact with the recording sheet in the state. A sheet contacting member driven by the sheet and a contacting member drying means for drying the sheet contacting member by generating an air flow in the direction along the surface of the sheet contacting member. Sheet playback device. 3. A contact member drying means is provided at each of a plurality of locations along the path, and a duct having an opening at a portion facing the surface of the contact member is opened, and an airflow is generated in the duct. 3. The recording sheet reproducing apparatus according to claim 2, further comprising: 4. An air flow switching means for sequentially and selectively generating an air flow as the surfaces of the recording sheet and the sheet contact member are moved is provided in the ducts respectively arranged at the plurality of locations. Item 3. A recording sheet reproducing apparatus according to item 3. 5. A destabilizing liquid application means for applying a liquid to a recording sheet having an image-forming substance adhered to the surface thereof to provide an instabilizing liquid for destabilizing the adhesion between the surface and the image-forming substance. And an image forming substance peeling means for separating the surface and the peeling body from each other after bringing the peeling body having a larger adhesive force to the image forming substance than the surface to contact the image forming substance on the surface. The recording sheet reproducing apparatus according to claim 1, further comprising: 6. An operation switch for switching whether or not to energize a predetermined electric component part in the apparatus with an external power, and a drive source for the seat contact member in a state in which energization is cut off by at least the operation switch. 3. The recording apparatus according to claim 1, further comprising a power supply circuit configured to be capable of supplying electric power, and a control device for driving the sheet contact member after the energization is cut off by the operation switch. Sheet playback device. 7. A cooling device for cooling the vicinity of the sheet contact member is provided, and the power supply circuit is configured to supply power to the cooling device at least in the cutoff state, and the switch. 7. The recording sheet reproducing apparatus according to claim 6, wherein the control device is configured to operate the cooling device after the energization is cut off by. 8. An exhaust device for exhausting air around the sheet contact member to the outside of the device is provided, and the power supply circuit is configured to supply power to the exhaust device at least in the cutoff state. 7. The recording sheet reproducing apparatus according to claim 6, wherein the control device is configured to operate the exhaust device after power supply is cut off by the switch. 9. A temperature detector for detecting a temperature in the vicinity of the sheet contact member is provided, and the control device controls the drive source, the cooling device or the temperature detector until the temperature detected by the temperature detector falls below a predetermined temperature. 9. The recording sheet reproducing apparatus according to claim 6, wherein the exhaust apparatus is configured to operate. 10. A sheet drying means for drying a sheet to which a liquid adheres, a sheet contact member driven so that the surface thereof moves endlessly in a closed path including a region in contact with the sheet in the state, A contact member drying means for drying the sheet contact member; a humidity detecting means for detecting the humidity of the sheet contact member; and a control means for controlling the operation of the drying means based on the output of the humidity detecting means. Characteristic liquid finishing sheet finishing device.