JPH0822228A - Wet processor of sheet-like medium - Google Patents

Abstract

PURPOSE:To make it possible to execute a jam treatment without contact with a processing liquid as far as possible by withdrawing the processing liquid in a processing tank and temporarily housing this liquid in a storage tank in case sheets jam in the processing liquid. CONSTITUTION:The sheet-like medium processing (regenerating) device 1 of a wet type is provided with the processing tank 10, the medium processing liquid 12 housed in this processing tank, media 21, etc., to be processed by immersing the sheet-like media into the processing liquid, the storage tank 43 and a circulating device 30 which withdraws the processing liquid from the processing tank, transports the liquid to the storage tank 43, conversely withdraws the processing liquid from the storage tank and returns the liquid to the processing tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for wet-processing a sheet-like medium used as a printing medium such as a copying machine or a printer or a sheet-like medium such as a film sheet with a special liquid.

[0002]

2. Description of the Related Art Heretofore, as the above-mentioned processing apparatus, there has been proposed an apparatus for immersing a sheet on which an image is formed with a toner in a toner swelling liquid and applying a physical force to the swollen toner to remove it.

[0003]

By the way, in such an apparatus, there is an unavoidable risk of jamming when processing copy paper or the like which is deteriorated in strength when immersed in a liquid. However, it is not preferred to configure the machine to process the jammed sheet in a liquid.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and includes a wet sheet-shaped media processing apparatus, a processing tank, and a sheet-shaped media processing liquid housed in the processing tank. A medium conveying means for immersing and processing the sheet-shaped medium in the treatment liquid contained in the treatment tank; a storage tank; a means for extracting the treatment liquid from the treatment tank and conveying it to the storage tank; A means for extracting the liquid from the storage tank and returning it to the processing tank is provided.

[0005]

According to the above construction, when the sheet is jammed in the processing liquid stored in the processing tank, the processing liquid in the processing tank is extracted and temporarily stored in the storage tank. Then, when the jam processing is completed, the processing liquid is extracted from the storage tank and is stored in the processing tank again. Therefore, the operator
Jam can be treated without touching the treatment liquid as much as possible.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a media reproducing apparatus 1 which is one mode of the sheet-shaped media processing apparatus according to the present invention. The reproducing apparatus 1 reproduces a medium such as copy paper or an OHP film made of synthetic resin by removing the toner fixed on the surface thereof by a wet method, and reproduces the medium to be processed one by one. A paper feeding unit 2 for supplying the inside of the apparatus, a processing unit 3 for removing the toner from the supplied medium by a wet method, a drying unit 4 for drying the medium from which the toner has been removed, and a unit for discharging the dried medium from the reproducing apparatus and storing it. It is composed of a discharge unit 5 for discharging.

The structure of these parts will be described in detail below. The paper feeding unit 2 is provided on the upper end side of the reproducing apparatus 1 and includes a cassette 7 for storing the media 6 and a paper feeding roller 8 for feeding the media 6 contained in the cassette 7 one by one. The media 6 fed is detected by a media detection sensor 9 provided near the paper feed roller 8.

The processing section 3 is provided with a first processing tank 10 and a second processing tank 11, and each of the processing tanks 10 and 11 includes
A deinking liquid 12 (which will be described in detail later) that swells the toner adhering to the medium 6 and floats it to a state where it can be easily removed by applying a physical treatment is stored.

In order to convey the supplied medium 6 to the drying section 4, the processing section 3 immerses the fed medium 6 in the deinking solution 12 in the first processing tank 10 and the deinking solution 12 in the second processing tank 11 in order. , A plurality of guides 13 to 19 and conveying rollers 20 to 24. Further, the second processing tank 11 is provided with a pair of opposing brush rollers 25 between the two guides 18 and 19 extending into the deinking liquid 12. Further, in the vicinity of the liquid surface of the deinking liquid 12, a media detection sensor 2 for detecting the medium 6 that enters the deinking liquid 12 or is taken out of the deinking liquid 12.
6, 27, 28 and 29 are provided.

The processing unit 3 also circulates the deinking liquid 12 in order to collect the toner floating in the deinking liquid 12.
It has. The circulation device 30 includes a circulation pump 31, and a filter device 32 is connected to the suction side of the circulation pump 31. The filter device 32 includes a first treatment tank 10
And recovery path 3 with one end connected to the second treatment tank 11
The other end of 3, 34 is connected, and the deinking liquid 1 collected from the first processing tank 10 and the second processing tank 11 by the circulation pump 31.
The toner contained in No. 2 is collected by the filter device 32. On the other hand, the discharge side of the circulation pump 31 is provided with the first processing tank 10 and the second processing tank 11 via the liquid supply paths 35 and 36.
The deinking liquid 12 from which the toner has been removed by the filter device 32 is sent back to the first processing tank 10 and the second processing tank 11, respectively.

Further, the circulation device 30 is provided with two switching valves 37, 38, 39, 40 in the respective recovery passages 33, 34, and opening / closing valves 41, 42 in the liquid feeding passages 35, 36. The first deinking liquid storage tank 4 is provided between the switching valves 37 and 38.
3, the second deinking liquid storage tank 44 is provided between the switching valves 39 and 40.
Is connected.

The drying section 4 is provided with a pair of rollers 45 and 46 whose outer peripheral portions are covered with rubber, and one roller 46 has a heater 47 built therein. The heating method does not have to be heat transfer, but may be a method of blowing warm air or utilizing radiant heat from a lamp or the like.

The discharging section 5 includes a discharging tray 48 for receiving the processed medium 6, a medium detection sensor 49 for detecting the medium 6 discharged from the drying section 4, and the sensor 4
It is provided with a conveyance roller 50 that supplies the medium 6 detected in 9 to the discharge tray 48.

The playback device having the above-described structure is drive-controlled by the control device 51 shown in FIG. More specifically, when the processing start signal is input from the start switch 52 in a state where the media 6 are stacked in the cassette 7, the drive system drive motor 53 is driven to start the media transfer process, and the paper feed roller is started. Based on the rotation of 8, the media 6 contained in the cassette 7 are fed to the processing unit 3 one by one. The fed medium 6 is immersed in the deinking liquid 12 by the guides 13 and 14 and the conveyance roller 20, and the guide 1
The deinking liquid 12 is transported by the rollers 5, 16 and the transport rollers 21, 22, 23. Alternatively, the medium 6 may be temporarily stopped and immersed in the deinking liquid 12 for a certain period of time. As a result, the toner T adhering to the medium 6 swells and floats, and a part of the toner T is separated from the medium 6 and floats in the deinking liquid 12.

Next, the first processing tank 10 is guided along the guide 17.
The medium 6 taken out from the medium is immersed in the second processing tank 11 by the conveying roller 24 and the guide 18, and the brush rollers 25, 25 apply a physical force to the surface to scrape off the remaining toner T.

Subsequently, the medium 6 from which the toner T has been removed
Is conveyed to the drying unit 4 while being guided by the guide 19,
Water is squeezed out by the rollers 45 and 46 and the heater 4
After being dried at 7, the sheet is discharged to the discharge tray 48 by the discharge roller 50.

The control device 51 drives the circulation pump 31 during the media processing operation to circulate the deinking liquid 12 in the processing tanks 10 and 11 to collect the floating toner and the precipitated toner T, and remove the deinking liquid. Clean 12 At this time, the on-off valve 4
1, 42 are set to the open state. In addition, the switching valves 37, 3
8, 39, 40 are the deinking liquids 12 along the recovery paths 33, 34.
Is set to flow, and the deinking liquid storage tanks 43 and 44 are in an empty state. Therefore, the toner T conveyed with the deinking liquid 12 through the collection paths 35 and 36 is collected by the filter device 32, and the cleaned deinking liquid 12 is supplied to the processing tanks 10 and 11 again.

The controller 51 also receives signals from the sensors 9, 26, 27, 28, 49 during the above media processing operation.
Also, a jam is detected from the output of a timer (not shown) activated based on the ON signal or OFF signal of these sensors, and necessary processing is executed according to the detection result. FIG.
The jam processing of the control device 51 will be specifically described with reference to the flowchart of FIG. 2. When a jam is detected from the output of the sensor 9 or the like (S101), the jam display lamp 54 is turned on to notify the occurrence of the jam. (S102),
The drive motor 53 of the transport system is stopped to suspend the transport of the medium 6 (S103). Next, the position where the medium 6 is jammed is detected based on the signal from the sensor 9 or the like (S10).
4) If the medium 6 is jammed while being immersed in the deinking liquid 12, the drainage process of the deinking liquid 12 in the processing tank 10 or 11 in which the jammed medium 6 is located is executed ( S105).

In this drainage process, if a jam occurs in the first processing tank 10, the switching valves 37 and 38 are switched to draw the deinking liquid 12 from the first processing tank 10 into the first storage tank 43. At this time, it is not necessary to drain all of the deinking liquid 12 from the processing tank 10 to the storage tank 43, and it is sufficient if the water level can be lowered to the extent that the jam can be processed without touching the deinking liquid 12 and the volume of the storage tank 43 can be reduced. It is enough to achieve this. Therefore, the operator can process the jammed media 6 without touching the deinking liquid 12.

On the other hand, if a jam has occurred in the second processing tank 11, the switching valves 39 and 40 are switched, and the deinking liquid 12 in the second processing tank 11 is extracted into the second storage tank 44. The amount of the deinking liquid 12 extracted from the processing tank 11 and the volume of the storage tank 44 are the same as those of the first processing tank 10 and the first storage tank 43.

When the jam processing is completed, the liquid sending processing is executed (S107). In this liquid sending process, first, the switching valve 37
(39) is switched to process tank 10 (11) and recovery path 33.
(34) is communicated with the processing tank 10 (11) and the storage tank 43.
Disconnect from contact with (44). Further, the switching valve 38 (4
0) is switched and the deinking liquid 12 stored in the storage tank 43 (44) is extracted to the recovery passage 33 (34) to be stored in the storage tank 4
After emptying 3 (44), the switching valve 37 (39) is switched again to disconnect the connection between the storage tank 43 (44) and the recovery passage 33 (34).

Next, the drive system drive motor 53 is driven to return to the normal processing (S108), and the jam display lamp 54 is turned off (S109).

By the way, in S104, when it is judged that the medium 6 not immersed in the deinking liquid 12 is jammed, for example, when the medium 6 is jammed in the paper feeding unit 2, the drying unit 4, the discharging unit 5, or the like, In such a case, since it is not necessary to extract the deinking liquid 12, the liquid sending process (S107) is not executed from the drain process (S105), and when the completion of the jam process is confirmed (S110), the media transfer is performed. Start (S10
The process of 8) is executed.

In the above embodiment, the same deinking liquid 12 is contained in the first processing tank 10 and the second processing tank 11, respectively, and these are circulated by one circulation device 30, which is shown in FIG. So that the liquid 112a contained in the first processing bath 110
The liquid 112b contained in the second processing tank 111 and the liquid 112b contained in the second processing tank 111 may be circulated by different circulation devices 130a and 130b, respectively. In this case, the respective liquids may have different compositions, and the liquid 1 in the first storage tank 110
12a is water and the liquid 112b in the second storage tank is the deinking liquid 1
As the second method, the medium 106 may be pre-immersed in the first treatment tank 110. The playback device 1 shown in FIG.
The reference numerals of 01 are the same as the elements shown in FIG. 1 with 100 added.

Further, in the above embodiment, separate storage tanks 43 and 44 are provided corresponding to the first processing tank 10 and the second processing tank 11, but one storage tank may also be used. Further, the first processing tank 10 may be used as a storage tank for the second processing tank 11, and the second processing tank 11 may be used as a storage tank for the first processing tank 10. Furthermore, the storage tanks 43, 4
4 does not have to be permanently installed in the reproducing apparatus 1, and may be mounted in the reproducing apparatus 1 only during the jam processing to reduce the size of the reproducing apparatus.

The deinking liquid will be described. A deinking solution for deinking a printing surface visualized by a printing material containing at least a resin on a recording medium such as a copy sheet is a component that dissolves or swells the resin of the printing material, and the deinked printing material is re-papered. A component that has the function of aggregating the printing material after deinking to prevent it from adhering to the paper, swelling the fibers of the paper, which is one of the recording materials, and makes the printing material easily detach from the paper fibers. When necessary, the components, components that contribute to the shortening of the deinking time by increasing the penetrability of the deinking liquid into the printing material and the paper, and the like are mixed and manufactured. Examples of components that dissolve or swell the resin of the printing material include divalent organic acid monoesters, glycol ethers, and other organic solvents.

Explaining the divalent organic acid monoester in detail, examples of the divalent organic acid of the monoester of the divalent organic acid include saturated or unsaturated fatty acids such as oxalic acid, malonic acid, succinic acid and glutaric acid. , Adipic acid, pimelic acid, suberic acid, mazelaic acid, sebacic acid, maleic acid or fumaric acid, or aromatic fatty acids such as phthalic acid, isophthalic acid and terephthalic acid can be used. Among these, saturated fatty acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid are preferable.

Examples of the alcohol component of the monoester of a divalent organic acid include monohydric alcohols (which may be linear or branched) such as methanol, ethanol, propanol, butanol, pentanol, ethylene glycol and glycerin. Polyhydric alcohols such as pentaerythritol and sorbitol, glycols such as diethylene glycol, dipropylene glycol and polyethylene glycol, or cellosolves such as ethyl cellosolve and butyl cellosolve can be used.
These alcohols can be used alone or in admixture of two or more.

The monoester of a divalent organic acid is provided by an esterification reaction of the above divalent organic acid with an alcohol or by a hydrolysis reaction of a diester of a divalent organic acid. Preferred monoesters of divalent organic acids have the general formula:

[0030]

Embedded image HOOC- (CH ₂ ) _n —COOR ₁ (in the formula, R 1 represents an alkyl group of carbon acids 1 to 5 and n represents an integer of 0 to 8).

Specifically, oxalic acid monoester (HO
OC-COOR ₁ ), malonic acid monoester (HOOC
-CH ₂ -COOR _1), succinic acid monoester (HOO
_{C- (CH 2) 2 -COOR 1} ), glutaric acid monoester _{(HOOC- (CH 2) 3 -COOR} 1), adipic acid monoester _{(HOOC- (CH 2) 4 -COOR} 1),
Pimelic acid monoester (HOOC- (CH _{2) 5} -CO
OR ₁ ), suberic acid monoester (HOOC- (C
H _{2) 6} -COOR _1), azelaic acid monomethyl ester (H
_{OOC- (CH 2) 7 -COOR 1} ), sebacic acid monoester _{(HOOC- (CH 2) 8 -COOR} 1) and the like. Of course, the divalent organic acid monoester may be used alone or in combination of two or more kinds.

The divalent organic acid monoester is mixed with water, which is a material for swelling the fibers of the recording material, paper, due to the presence of the carboxylic acid group, and for making the printing material easily separated from the paper fibers. It dissolves and has excellent penetrating power to printing materials. Due to the presence of ester groups, swelling in toner,
It is considered that the dissolving power is secured.

The total amount of the deinking solution used is 5 to 60% by weight, preferably 20 to 40% by weight. 5
If it is less than wt%, the swelling property and solubility in the printing material will be inferior and there will be no deinking effect. If it is more than 60 wt%, the dissolving power in the printing material will be too high and it will easily re-adhere to paper.

Next, the glycol ether will be specifically described. For example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monoisoamyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether. Ethyl ether,
Examples thereof include diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, tripropylene monomethyl ether, etc. One kind or a mixture of two or more kinds may be used.

Glycol ethers also have penetrability into paper. The total amount of the deinking solution used is 5 to 95% by weight, preferably 10 to 80% by weight. If the amount is less than 5% by weight, the swelling property and the solubility to the printing material are inferior and the deinking effect is not exerted, and if it is more than 95% by weight, the dissolving power to the printing material is too high and the redepositing on the paper easily occurs.

More specifically, other organic solvents include those which do not mix with water and dissolve or swell the toner. For example, benzene, toluene, xylene, dichloromethane, methyl ethyl ketone, methyl acetate, ethyl acetate, ethyl ether, propyl ether, butyl ether, diisobutyl ketone, butyl acetate, ethyl butyl acetate, methyl propionate, ethyl propionate and the like are preferably used. These organic solvents may be used alone or in admixture of two or more. The total amount of deinking liquid added is 10 to 70% by weight, preferably 2
It is used in the range of 0 to 60% by weight. If the amount is less than 10% by weight, the swelling property and the solubility to the printing material are inferior and the deinking effect is not obtained, and if the amount is more than 70% by weight, the dissolving power to the printing material is too high and the redepositing on the paper easily occurs.

In order to prevent the deinked printing material from adhering to the paper again, examples of the component having an action of aggregating the printing material such as toner after deinking include a surfactant, a higher fatty acid and a higher fatty acid. Esters can be mentioned.

The surfactant will be specifically described below.
Anionic surfactants, nonionic surfactants, cationic surfactants and amphoteric surfactants can be used.
Conventionally, a surfactant has been used as a deinking agent for pulped waste paper, but when the printing material is a resin, the deinking action is very effective even if the surfactant alone is directly applied to the recording medium. Since it is weak, the present invention preferably contains a component that dissolves or swells the resin as described above.

As the anionic surfactant, fatty acid salts,
Alkyl sulfate ester salts, alkylbenzene sulfonates, alkylnaphthalene sulfonates, alkyl sulfosuccinates, alkyl diphenyl ether disulfonates, alkyl sulfosuccinates, naphthalene sulfonic acid formalin condensates, polycarboxylic acid polymer surfactants, etc. It can be preferably used.

As the nonionic surfactant, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, oxyethylene-oxypropylene copolymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine and the like are preferable. Can be used for.

As the cationic surfactant or amphoteric surfactant, alkylamine salts, quaternary ammonium salts, alkylbetaines, amine oxides and the like are preferable. Each of the above surfactants may be used alone or in combination of two or more. A particularly preferred surfactant has the chemical formula: RO
(CH ₂ CH ₂ O) _n H (wherein R represents a C21 to C22 alkyl group or an alkylphenyl group, n represents an integer of 1 to 10) and is an ethylene oxide addition-type nonionic surfactant. is there.

The surface-active agent surrounds the deinked printing material and has the effect of preventing re-adhesion to the recording medium. further,
When the recording medium is plain paper or the like, it also has an action of entering the inside of the stitch structure of the paper to surround the printing material and facilitating deinking of the printing material that has penetrated deep into the fiber. Furthermore, when the liquid that dissolves or swells the printing material is insoluble in water and water is used as the deinking agent, it also has a function of forming a stable deinking liquid of an O / W type emulsion.

The amount added in the entire deinking solution is 0.1-10.
It is used in the range of wt%, preferably 0.1 to 5 wt%. If it is less than 0.1% by weight, the above effect is difficult to obtain, and if it is more than 10 parts by weight, bubbles and the like increase and handling becomes difficult.

The higher fatty acid will be specifically described below.
For example, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, eleostearic acid, arachidic acid, arachidonic acid, behenic acid, erucic acid, abietic acid. , Rosin acid, coconut oil, linseed oil, beef oil, tall fatty acid, phytic acid and the like.

The higher fatty acid ester includes the above-mentioned higher fatty acid and a hydroxy compound, for example, alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol and butyl alcohol, ethylene glycol, glycerin, pentaerythritol, sorbitol, diethylene glycol, dipropylene glycol and the like. Ester compounds with polyhydric alcohols are preferred.

The higher fatty acid and / or higher fatty acid ester has a function of aggregating the deinked printing material and preventing it from re-adhering to the recording medium. The amount added in the entire deinking solution is 5 to 95
It is used in an amount of 20% by weight, preferably 20 to 80% by weight. If it is less than 5% by weight, the cohesive effect is lowered, and if it is more than 95% by weight, the effect of the liquid for dissolving or swelling the printing material is lowered.

Water is mentioned as a component that swells the fibers of paper, which is one of the recording materials, and makes the printing material easily detach from the paper fibers. The amount of water added to the entire deinking solution is 1 to 90% by weight, preferably 30 to 80% by weight based on the entire deinking solution. 90% by weight of water used
If it exceeds, the fibers of the paper will be destroyed, and the drying after deinking will take too much labor, which is not preferable. If the amount of water used is less than 1% by weight, the effect of spreading the fibers of the paper cannot be obtained, and the deinking agent cannot properly permeate into the paper. An appropriate amount is set according to the type of liquid that dissolves or swells the resin.

Examples of the component that enhances the penetrability of the deinking liquid into the printing material and the paper and contributes to the shortening of the deinking time include organic acids. Specifically, saturated aliphatic carboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid,
Pymic acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, etc., unsaturated aliphatic carboxylic acids such as acrylic acid, propiolic acid, methacrylic acid, crotonic acid, oleic acid, lenolic acid , Erucic acid, ricinoleic acid, abietic acid, rosin acid, or aromatic carboxylic acids such as benzoic acid, toluic acid, naphthoic acid, cinnamic acid, 2-furic acid, nicotinic acid and isonicotinic acid can be used. . These organic acids can be used alone or in admixture of two or more. Of these, higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, erucic acid, ricinoleic acid, abietic acid and rosin acid are preferred. Palm oil, linseed oil, beef tallow, whale oil and the like containing these higher fatty acids can also be used.

The organic acid is preferably contained in the deinking agent in an amount of 1 to 10% by weight. Although the function of the organic acid used in the present invention in the deinking action is not always clear, the deinking agent of the present invention improves penetration into toner, paper, etc., shortens deinking time, and removes efficiently. It is thought to have an effect.

To the deinking agent of the present invention, for example, methanol, ethanol, n-butanol, isopropanol, ethoxyethanol, etc. may be added within a range not impairing the effects of the present invention.

As the compounding form of each component for performing deinking easily and efficiently, (divalent organic acid monoester, organic acid, surfactant, water), (glycol ether solvent, higher fatty acid and / Or higher fatty acid ester, surfactant, water), (organic solvent, surfactant, water) and the like can be exemplified, but needless to say, the combination is not limited to these.

[0052]

As is apparent from the above description, the sheet media processing apparatus according to the present invention has a storage tank for temporarily storing the processing liquid in the media processing tank, and the processing liquid is extracted from the processing tank. It is equipped with a means for transporting the processing liquid to the storage tank and a means for extracting the processing liquid from the storage tank and returning the processing liquid to the processing tank. It can be moved to the storage tank and jam can be processed without the media being immersed in the processing liquid. Therefore, the jam can be easily treated without getting wet with the treatment liquid.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a reproducing device.

FIG. 2 is a control circuit diagram of the playback device.

FIG. 3 is a flowchart of jam processing in the playback device.

FIG. 4 is a sectional view showing another embodiment of the reproducing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reproducing device, 2 ... Paper feeding part, 3 ... Processing part, 4 ... Drying part,
5 ... Ejection part, 6 ... Media, 10 ... First treatment tank, 11 ...
2nd processing tank, 12 ... Deinking liquid, 13-19 ... Guide, 20
24 ... Conveying rollers, 30 ... Circulating device, 43 ... First storage tank, 44 ... Second storage tank.

Claims (1)

[Claims] 1. A sheet-shaped medium is immersed in (a) a processing tank, (b) a sheet-shaped medium processing solution contained in the processing tank, and (c) a processing solution contained in the processing tank. Media transport means for processing, (d) storage tank,
(E) A sheet shape comprising: a means for extracting the processing liquid from the processing tank and transporting it to the storage tank; and (f) a means for extracting the processing liquid from the storage tank and returning it to the processing tank. Wet processing equipment for media.