JPH01274139A - Device for wiping away moisture - Google Patents

Abstract

PURPOSE:To improve moisture treating capacity with the compact device by providing squeeze rollers consisting of a water repellent material to the upper stream side in the direction where a tape-shaped material is carried. CONSTITUTION:At least two sets of the squeeze rollers are provided to the device for wiping away moisture having the squeeze rollers which consist of a pair of rollers provided to face each other so as to sandwich the tape-shaped material 2 to be carried to a drying stage and squeeze the moisture sticking to the material 2. The one roller on the upper stream side of said rollers is constituted of the water repellent squeeze roller 3 the surface of which consists of the water repellent material. Further, the other roller on the down stream side thereof is constituted of the hydrophilic squeeze roller 4 the surface of which is formed of a hydrophilic material. Only the respective one-sides 3a, 4a of the water repellent roller 3 and the hydrophilic roller 4 are driven in the direction where the material 2 is carried. The moisture is, therefore, mostly squeezed away by the water repellent roller 3 on the upper stream side and the remaining moisture is absorbed by the hydrophilic roller 4 on the down stream side thereof. The moisture removing capacity is thereby improved with the compact device.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a water wiping method used to remove water adhering to the surface of a tape-like object such as a film that has been washed with water after film development. Regarding equipment.

<Prior art> When storing a large amount of documents, it is generally necessary to micronize the documents using microfilm, etc., and, if necessary, enlarge and project the documents recorded on the microfilm, or enlarge and copy the documents. are doing.

In such a series of microfilm systems, processing of microfilm taken with a camera,
Fixing treatment, washing treatment.

Film processing equipment that automatically performs drying processing has been developed.

In such film processing equipment, since moisture is attached to the surface of the film that has been washed with water after the development process,
It is necessary to remove some of this moisture before the film is sent to the drying process. For this reason, in the past, a large number of rollers are provided across the transport direction, including a squeeze roller that sandwiches the film, and a pair of rollers that are arranged opposite to each other. By passing the film through this squeeze roller, water adhering to the surface of the film is squeezed out and removed.

<Problems to be Solved by the Invention> Incidentally, conventionally used film processing apparatuses have been large in size, making it impossible to carry them around and process films at remote locations, for example. Therefore, a compact and portable film processing apparatus is desired.

In such a compact film processing device,
Since the developing process and the drying process must be placed close to each other, it is difficult to install a large number of squeeze rollers as in the past.

On the other hand, if the number of squeeze rollers installed is reduced, moisture cannot be removed sufficiently, resulting in insufficient drying and uneven drying.

In particular, when trying to downsize the drying process, it is impossible to blow large amounts of air as in the past.
It is necessary to remove water more thoroughly than ever before.

In addition, a water wiping device with high water removal ability is useful for removing water not only from microfilms but also from tape-like materials.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a moisture wiping device that is compact and has high moisture removal ability.

Means for Solving the Problems> The structure of the present invention for achieving the above object includes a pair of rollers that are disposed opposite to each other so as to sandwich the tape-like material being conveyed to the drying process. In a moisture wiping device having a squeeze roller for squeezing out moisture adhering to the water, at least two sets of the above-mentioned squeeze rollers are provided, and one of the squeeze rollers on the upstream side is a water-repellent squeeze roller whose surface is made of a water-repellent material. In addition, the other downstream side is a hydrophilic squeeze roller whose surface is formed of a hydrophilic material,
The present invention is characterized in that only one of the water-repellent roller and the hydrophilic roller is driven in the direction in which the tape-like material is conveyed.

In the moisture wiping device configured as described above, when a film with moisture attached after washing with water is conveyed, most of the moisture is squeezed out by passing through the upstream water-repellent squeeze rollers. At the same time, the remaining water is further absorbed by the hydrophilic roller on the downstream side.

Example of implementation Hereinafter, preferred embodiments of the present invention will be described in detail.

FIG. 1 shows a schematic diagram of the moisture wiping device of this embodiment. As shown in the figure, the moisture wiping device 1 of this embodiment has two sets of squeeze rollers 3 and 4, each consisting of a pair of rollers facing each other so as to sandwich the tape-like material 2. .

Drive four rollers 3a, 4a that come into contact with the lower side of the tape-like material 2 among the opposing rollers of these squeeze four rollers 3, 4
is rotatably fixed and driven in the direction of feeding the tape-like material 2, and the tape-like material 2 is
The driven rollers 3b and 4b that come into contact with the upper side of the drive roller 3a are pressed by pressing means (not shown).

The drive roller 3a is pressed toward the drive roller 4a.

It is rotatably supported so as to rotate together with 4a.

Of the two sets of squeeze rollers 3 and 4 arranged in parallel in the conveying direction of the tape-like material 2, one of them on the upstream side is a highly water-repellent squeeze roller 3 that repels moisture. The other downstream side is a hydrophilic squeeze roller 4 that absorbs moisture.

The water-repellent squeeze roller 3 is made of a water-repellent material such as a highly water-repellent synthetic resin such as silicone resin or phenol resin, and is integrally molded.

Further, one of the hydrophilic squeeze rollers 4 is formed by pasting a highly hydrophilic material 5 such as synthetic leather such as Ecsaine (product name: Nitoshi Co., Ltd.) on the outer surface of a plastic or metal roll 6. ing.

Here, the Ecsaine used in this example is a single layer of intertwined bundles of extremely fine &a fibers (0.01 to 0.09 denier), similar to natural leather, so it has appropriate elasticity and water absorption. It has a sexual nature.

By providing the squeeze rollers 3 and 4 made of different materials in the middle of conveying the tape-like material 2, most of the moisture is squeezed out of the tape-like material 2 to which moisture has adhered by the water-repellent squeeze roller 3 on the upstream side. At the same time, the remaining moisture is completely wiped away by the downstream hydrophilic squeeze roller 4.

Although two sets of squeeze rollers are provided in this embodiment, the present invention is not limited to this, and as long as there is at least one set of water-repellent squeeze rollers on the upstream side of a hydrophilic squeeze roller. , and a plurality of squeeze rollers may also be provided.

Next, various materials were used for the drive roller 3a and driven roller 3b of the water-repellent squeeze roller 3, and their water removal ability was tested by measuring the moisture content of the film.

Tape-like material 2 that has passed through the upstream water-repellent squeeze roller 3
If a certain amount of moisture remains, the downstream hydrophilic squeeze roller 4 will quickly become saturated, making it impossible to completely remove the moisture. Therefore, in order to prevent uneven drying, it is necessary to select a water-repellent squeeze roller 3 that has a high water removal ability.

In this test example, a load of 200 g, 400 g) was applied to the driven roller 3b side, and the respective materials were synthetic rubber other than silicone (hereinafter referred to as "synthetic rubber"), phenol resin (hereinafter referred to as "phenol"). ), silicone resin (hereinafter referred to as "silicon"), and the moisture content of the microfilm after passing through these water-repellent squeeze rollers 3 was measured.

The moisture content of the raw film used in this test was 0.55.
%, and the moisture content of the film without squeezing is 2
It was 0%. In addition, the hardness of the synthetic rubber used is 45"
, the rubber hardness of silicone is 30°.

The results of these tests are shown in Table 1 and Figure 2. In addition, (a 1), (b 1) #(c-1), (d
-1), (e-1), (f-1) show the state where the film is being squeezed, (a-2), (b-2),
(c-2), (d-2).

(e-2) and (f2) show the state of moisture adhesion on the upper and lower sides of the squeezed film.

As shown in FIG. The entire surface of the roller became a puddle, and the squeezed film had a considerable amount of water attached to both surfaces, with a moisture content of 8.75% (200g load).

It was as high as 8.29% (400g load). In the combination of phenol/synthetic rubber, Fig. 2 (b-1), (
As shown in b-2), water accumulates on the contact surface of the roller during squeezing, and a lot of water adheres after squeezing, and the moisture content is 7.78% (200g) and 7.72% (400g).
) and synthetic rubber, the moisture content was lower than when using synthetic rubber. The combination of silicone/synthetic rubber is shown in Figure 2 (C-1), (
As shown in c-2), during squeezing, many water pockets were formed on the synthetic rubber side, and after squeezing, water droplets were attached to the silicone side, while considerably more water was attached to the synthetic rubber side.
The moisture content is 8.4% (200g), 7.88% (400g)
g) was higher than that of phenol/synthetic rubber.

The combination of phenol/phenol is shown in m2 diagram (d-1)
, As shown in (d-2), some water pooled on the contact surface of the roller during squeezing, but after squeezing, water droplets were scattered all over both sides, and the moisture content was 8.18.
% (200g) l 7.34% (400g). The combination of silicone/phenol is shown in Figure 2 (e-1).
.

As shown in (e-2), during squeezing, water droplets adhere to the surface of the roller on the silicone side, and small puddles form on the phenol side at the contact area with the film, and after squeezing, water droplets adhere to some areas. , moisture content is 7.13% (200g
).

The moisture content was low at 6.24% (400g). The silicon/silicon combination is shown in FIG. 2 (f-1).

As shown in (f-2), some water droplets adhered to both rollers on the silicone side during squeezing, and a few water droplets adhered to the silicone side after squeezing, and the moisture content was 6.73% (200 g).
It was 6.05% (400g), which was significantly lower than other combinations.

From the above results, it was confirmed that forming a water-repellent squeeze roller using a combination of silicone and silicone is suitable for removing moisture.

Table 1 Moisture Content Silicone (Rubber Hardness 30'') Next, an example in which the moisture wiping device of this example was installed in a film processing device will be described below.

Figure 3 is an external perspective view of the film processing device 1, Figure 4 is its internal structure diagram, Figure 5 is a view from the ■-■ arrow in Figure 4, and Figure 6 is the state of transport of the film during processing. FIG. As shown in these drawings, between the developing process and the drying process of the film processing apparatus, the moisture wiping device of the above embodiment, which consists of two sets of squeeze four-ra 3 and 4, is installed in the film transport direction. It is provided.

The outline of this film processing apparatus will be explained below. As shown in Figures 3 to 6, a carrying handle 1 for carrying
A front part 1113 is pivotally supported on the front part of the casing 12 to which the casing 1 is rotatably mounted, and a front part 1113 is pivotally supported through a hinge 14 so as to be freely openable and closable back and forth. Two partition frames 15.
16 are fixedly installed.

A light-shielding case 18 that houses the supply reel 17 is fixed to the first partition frame 15, and within the light-shielding case 18, a roller 19 is rotatably attached to a pair of reel holders that hold the supply reel 17 in a freely removable manner. ing. Note that this supply reel 17 has an exposed film 20 wound therein. A fixed guide roller 21 is rotatably attached to the upper end of the partition frame 15, and a pair of photoelectric rollers are installed between the fixed guide roller 21 and the supply reel 17 to detect the presence or absence of exposed film 20. A film sensor 22 is provided.

On the mutually opposing sides of the partition frame 15, 16, two pairs of right and left tray guide rollers 23 are rotatably attached to the front and rear, respectively.
A tray 25 is mounted on the top for removably placing the processing liquid tank 24, and can be moved forward and backward. The inside of the processing liquid tank 24 is divided into four parts by three partition walls 26, and a developing liquid 27, a fixing liquid 28, a first cleaning liquid 29, and a second cleaning liquid 30 are stored respectively. In this embodiment, a magnetic stirrer 31 m, which will be described later, is installed at the location where the developing solution 27 and cleaning solution 29.30 of the processing solution tank 24 are stored.
1 that rotates with the operation of 3 l b, 31 c
Stirring blades 32 are rotatably assembled, respectively, to stir the developer 27 and the washing i29, 30. Further, at the upper end of the processing liquid tank 24, the front and rear ends of each support shaft 34, which rotatably supports the four direction changing rollers 33, are held.

A beam 35 whose left and right ends are connected to partition frames 15 and 16 is arranged behind the processing liquid tank 24, which is placed on a tray 25. At the front end of the swing holder 37, which is rotatable back and forth on the beam 35 via a hinge 36,
A rod-shaped developing heater 38 that heats the developer 27, a liquid temperature sensor 39 that detects the temperature of the developer 27, and a developer 27.
A liquid level sensor 40 for electrically detecting whether the liquid level is above a fixed level is provided to protrude downward. Further, the front end of the swing holder 37 is flipped upward about a hinge 36 at the rear end of the swing holder 37, and a developing heater 38 and a liquid temperature sensor 39 are connected to the processing liquid tank 24.
and one end of a tension spring 41 having a spring force sufficient to retract the liquid level sensor 40 are connected, and the other end of this tension spring 41 is fixed to the beam 35. Further, the front end of the receiver contacts the rear end of the processing liquid tank 24 on the tray 25, and the front end of the swinging holder 37 is tilted forward about the hinge 36, thereby removing the developing heater 38, the liquid temperature sensor 39, and the liquid. Surface sensor 40
A contact plate 42 formed of a leaf spring for immersing the lower part in the developer 27 has a rear end attached to the hinge 3.
It is connected to the swing holder 37 so as to be located rearward than the swing holder 6.

Note that the spring force of the contact plate 42 is set to be stronger than the spring force of the tension spring 41 in the state shown in FIG. Therefore, the processing liquid tank 2 is attached to the contact plate 42.
4 is pressed against the contact plate 42.
Although the front side of the swing holder 37 is pushed down, the front end of the contact plate 42 becomes free by pulling out the processing liquid tank 24 forward together with the tray 25, and the spring force of the tension spring 41 is released. As a result, the front side of the swing holder 37 is flipped upward.

The three magnetic stirrers 3 are arranged close to the processing liquid tank 24 and facing the stirring blades 32, respectively.
1a to 31c are rotatably supported by a stirrer support beam 43 disposed between partition frames 15 and 16 via support shafts 44, respectively. Then, the support shaft 44 of the magnetic stirrer 31a for the developer 27 and the second cleaning w! , 30, an endless chain 45 is wound between the support shaft 44 of the magnetic stirrer 31c for the developer 27, and the support shaft 44 of the magnetic stirrer 31a for the developer 27.
An endless driving chino 47 is wound between the supply reel 17 and a spindle (not shown) of a stirring motor 46 provided on the rear side of the light-shielding case 18 of the supply reel 17. In addition, between the magnetic stirrers 31 a and 3 l b, a Cheno 45 is connected to the magnetic stirrer 3 for the first cleaning liquid 29.
A tension sprocket 48 is provided to mesh with the support shaft 34 of 1b. Therefore, when the stirring motor 46 is driven, all the magnetic stirrers 31a~
31c rotates in the same direction, and in conjunction with this, the stirring blade 32 incorporated in the processing liquid tank 24 rotates with it due to magnetic force, stirring the developer 27 and the cleaning liquid 29, 30.

An upper lid 49 that can be opened and closed vertically is provided on the upper end surface of the casing 12. Above M49, a casing 12 is placed opposite to the partition frame 15, 16.
A pair of guide rods 51 are provided to protrude downward from a pair of guide tubes 50 fixed to the upper end of the guide tubes 50 so as to be slidable up and down, respectively.
1, it can be moved up and down. On the front end side of the upper lid 49, a roller rack 53 is provided with a processing roller 52 immersed in the developing solution 27, the fixing solution 28, and the cleaning solution 29, 30, respectively, rotatably attached to the lower end thereof. It is installed protrudingly. Note that, in order to prevent interference with the partition wall 26 of the processing liquid tank 24, the roller rack 53 is formed with three vertical notches 55. Further, on both left and right sides of the rack bracket 54, when the upper cover 49 is lowered, the upper cover 49 is attached to the casing 12.
A pair of lock operation knobs 57 each having a lock claw 56 for tightly fixing the upper cover 49 to the casing 12 is rotatably attached to the upper cover 49. It is detected by a touch sensor 58 attached to the upper end.

Place F divided by partition frame 16! 1 liquid tank 2
A partition wall 59 is fixed to the cage jig 12 on the side opposite to the cage jig 4, which partitions the inside of the casing 12 in this part into front and rear parts. Behind this partition wall 59, a round fan motor 6 is installed to install a blower fan 60 for drying the processed film 20.
1 is disposed, and the air from the blower fan 60 by the operation of this fan motor 61 is blown out parallel to the surface of the film 20 from the 1-air blowout hole 62 formed in the partition wall 59. A drying heater 63 is disposed between the hot air outlet 62 and the blower fan 60 in order to shorten the drying time of the film 20.

In FIG. 2, a film drive roller 65 connected to a film transport motor 64 is rotatably attached to the upper right end of the partition wall 59. Similarly, a take-up shaft 66 is rotatably provided at the lower left end of the partition 959, and a take-up reel 67 for winding the dried film 20 is removably attached to the take-up shaft 66. ing.

The above-mentioned water repellent squeeze roller 3 and hydrophilic squeeze roller 4 are provided immediately upstream of the drying roller 63 so as to sandwich the film 20 coming out of the processing tank 24.

The drive rollers 3a, 4a are rotatably fixed to the partition wall 59 via a bracket 68. These driving rollers 3a and 4a are driven together with a film driving roller 65 and a winding shaft 66 via an endless synchronous chain 70. That is, in this embodiment, a pair of retracting sprockets 71° 71 disposed between the drive rollers 3a, 4a and the film drive roller 65, and the winding shaft 6
The windings placed on the left and right sides of 6 are sprockets 72.72
is rotatably attached to the partition wall 59 and meshed with the synchronous chain 70, and is connected to the film transport motor 64.
Due to the operation of the drive rollers 3a, 4a.

The film drive roller 65 and the take-up shaft 66 are rotated synchronously. Note that all of these drive mechanisms are arranged behind the partition wall 59.

On the other hand, the driven four-wheelers 3b and 4b are mounted on a roller holder 75 suspended from the upper M49 via a roller bracket 74.
is rotatably supported. The roller holder 75 can be freely moved in the vertical direction via the pin 76a to the roller bracket 7.
A compression spring 7 is connected between the roller holder 75 and the roller bracket 76 to press the driven rollers 3b, 4b toward the driving rollers 3a, 4a.
7 is interposed. A pair of detent pins 76b are protruded from both sides of the pin 76a of the roller holder 75 and engage with grooves (not shown) formed in the roller bracket 76, and the drive roller 3a.

The rotational axis of roller 4a and the rotational axis of driven rollers 3b and 4b are held parallel to each other.

In this way, in this embodiment, the driven roller 3b.

4b is attached to the upper lid 49 to which the processing roller 52 is attached via a roller bracket 74 and a roller holder 75, and is configured to move together with the upper lid 49. Therefore, as shown in FIG. 4, the driven roller 3b is
.

The film 20 is placed on the driving rollers 3a, 4a with the film 4b in standby above, and the driven roller 3 is placed together with the upper lid 49.
When b and 4b are lowered, the film 20 is held between the squeeze rollers 3 and 4. In this way, in this embodiment, the workability for sandwiching the film 20 between the rollers is improved. Further, since the roller holder 75 that rotatably supports the driven rollers 3b and 4b is always pressed toward the driving rollers 3m and 4a by the spring force of the compression spring 77, the moisture on the film 20 can be surely wiped off. .

During actual work, first place the entire device on a desk or the like, and plug the plug 79 at the end of the power cord 78 provided on the back side of the casing 12 into an indoor power outlet or the like.

Then, open the front 1ji 13 and turn the four-wheel operation knob 5.
7 to disengage the lock claw 56 from the casing 12, then grasp the handle 80 provided on the upper lid 49 and move the processing roller 52 together with the upper lid 49 to the processing liquid tank 24.
(See Figures 4 and 5). on the other hand,
The empty processing liquid tank 24 is pulled forward along with the tray 25, but at this time, the tip of the contact T-plate 42 becomes free while the tray 25 is being pulled out, so the tension spring 41 is released. The swinging holder 37 becomes the hinge 36 due to the force.
The developing heater 38. Liquid temperature sensor 39.
The liquid level sensor 40 is retracted above the processing liquid tank 24. A fixed amount of developer 27, fixer 28, and cleaning liquid 29, 30 are injected into predetermined locations of processing liquid tank 24 pulled out to the front of casing 12. Return to original position. At this time, since the tip of the contact plate 42 presses against the processing liquid tank 24, the swing holder 37 rotates against the spring force of the tension spring 41, and the developing heater 38, liquid temperature sensor 39, and liquid water sensor 40 is development Fl! 27 (see Figures 4 and 5).

Next, the lid (not shown) of the light-shielding case 18 is opened, and the supply reel 17 on which the developed film 20 is wound is placed on the roller 19 of the reel receiver inside the light-shielding case 18, and the film 20 is placed on the roller 19.
Light-shielding case 1 with the tip of the leader section pulled out.
Close the lid of step 8. Then, the leading end of the film 20 is passed from the fixed guide roller 21 to the processing liquid tank 24 and above the drive rollers 3a, 4a, and then passed through the hot air outlet 62.
The film is wound around the film driving roller 65 through the front of the film.
It is fixed to a take-up reel 67 attached to a take-up shaft 66 (see FIG. 4).

Thereafter, the front cover 13 is closed, the upper cover 49 is pushed down, the lock operation knob 57 is operated, the lock claw 56 is engaged with the casing 12, and the upper cover 49 is fixed to the casing 12.

As shown in FIG. 6, which shows the state at this time, the processing roller 52 is attached to the league part of the film 20 while the upper lid 49 is lowering.
is pressed and enters the processing liquid tank 24 as it is, and as a result, the film 20 is wound alternately around the processing roller 52 and the four direction changing rollers 33, and is meandered up and down as it passes through the developer 271. It is immersed in the fixing liquid 28 and the cleaning liquids 29 and 30. Also, a drive roller 3a.

The driven rollers 3b, 4b facing the film 20 are also moved by the spring force of the compression spring 77 as the upper lid 49 is lowered.
It should be pressed against the drive rollers 3a, 4a in a pinched state.

Then, when the start switch 81 is turned on, the developing heater 38 and the drying heater 63 are energized, the stirring motor 46 and the fan motor 61 are operated, and the developing solution 27 and the cleaning solution 29, 30 are stirred and kept at a constant temperature. hot air is blown out from the hot air outlet 62. When the liquid temperature sensor 40 detects that the temperature of the developer 27 has reached a predetermined temperature, the film transport motor 64 starts operating.

As a result, the film 20 is subjected to development processing, fixing processing, and water washing processing. Then, before being conveyed to the drying process, the film is sandwiched between the water-repellent squeeze roller 3 and the hydrophilic squeeze roller 4 on the entry side to efficiently remove moisture adhering to the surface, and while passing in front of the hot air outlet 62. Dry and roll
It is wound up on J-le 67. When the film sensor 22 detects that the film 20 is no longer present, all electricity is turned off after a certain period of time, the front N13 is opened, and the take-up reel 67 on which the processed film 20 is wound is removed from the take-up shaft 66. In addition, the current #1! 'tF127, fixing liquid 28, and cleaning M29, 30 may be replaced or discarded at this time as necessary.

<Effects of the Invention> As described above in detail with the embodiments, the moisture wiping device of the present invention is provided with a squeeze roller made of a submersible material on the upstream side in the conveying direction of the tape-like object, and a squeeze roller made of a hydrophilic material on the downstream side. By providing a squeeze roller, moisture can be almost completely removed, resulting in a compact body with high moisture handling ability and the ability to simplify the subsequent drying process.

[Brief explanation of the drawing]

Figure 1? 2 is a schematic diagram of the moisture wiping device of this embodiment, FIG. 2 is a schematic view of the squeeze roller of the moisture wiping device made of various materials, FIG. 3 is a perspective view of the outside of the film processing device, and FIG. The figure is an internal structure diagram of the device, and Figure 5 is V- in Figure 4.
② Arrow view and FIG. 6 are work conceptual diagrams showing the conveyance state of the film during processing. In the drawing, 1 is a moisture wiping device, 2 is a tape-like material, 3 is an aqueous squeeze roller, 4 is a hydrophilic squeeze roller, 3a and 4a are drive rollers, 3b and 4b are driven rollers, and 5 is a hydrophilic material , 12 is a casing, 16 is a supply reel, 20 is a film, 24 is a processing liquid tank, 29.30 is a cleaning liquid, 49 is an upper lid, 59 is a partition wall, 65 is a film drive 4-ra, 66 is a winding shaft, 71 is a A retraction sprocket, 72 a winding sprocket, 74 a roller bracket, 75 a roller boulder, 76a and 76b pins, and 77 a compression spring. Patent application Agent: Fuji Photo Film Co., Ltd.

Claims (1)

[Claims] In a moisture wiping device having a squeeze roller that squeezes out water adhering to the tape-like material, the device is comprised of a pair of rollers facing each other so as to sandwich the tape-like material being conveyed to the drying process. One of the upstream sides is a water-repellent squeeze roller whose surface is made of a water-repellent material, and the other downstream side is a hydrophilic squeeze roller whose surface is made of a hydrophilic material. A water wiping device characterized in that only one of the water-repellent roller and the hydrophilic roller is driven in the direction of conveying the tape-like material.