JPH08267711A - Printed image post processing device - Google Patents

Abstract

PURPOSE: To remove an excess printing ink on a face of a printed image, prevent staining of a body to be printed, and prevent leakage of an excess ink removing liquid. CONSTITUTION: A supply nozzle supplies an excess ink removing liquid to a contact roller. The excess ink removing liquid is not compatible with a printing ink and its surface tension is lower than that of the printing ink. The excess ink removing liquid of the contact roller 37 comes into contact with a face of a printed image of a body to be printed. An excess portion of the printing ink is transferred from the body to be printed to the excess ink removing liquid of the contact roller 37, and removed from the contact roller 37 by a blade 45. At the end face of the contact roller 37, a leakage preventing member 53 is provided for absorbing the excess ink removing liquid which leaks from the contact roller 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print image post-processing apparatus used in a printing apparatus such as stencil printing. The present invention is particularly effective as a countermeasure against set-off and strike-through in printed matter.

[0002]

2. Description of the Related Art In printing using a liquid printing ink, when printing materials are overlaid immediately after printing, the printing ink forming a printed image adheres to the back surface of one sheet, causing set-off. Also, immediately after printing, the printed image surface may be rubbed lightly with your fingertips, which may cause the printed image to collapse, or the printing ink that forms the printed image may pass through the substrate. Problems such as see-through on the back surface may occur.

These problems are particularly noticeable in stencil printing, in which the amount of printing ink forming a printed image on a printing medium, that is, the amount of ink buildup is larger than that of other printing.

[0004] Conventionally, in order to prevent the occurrence of such set-off and strike-through, attempts have been made to reduce the amount of inking on the printing medium during the printing process. However, it is difficult to quantitatively control the amount of buildup, and if the amount of buildup is suppressed too much, the density of the printed image will be reduced, the print will be blurred, and the quality of the printed image will be degraded.

As a means for avoiding the above-mentioned problems, it is conceivable to heat and dry the printing ink for forming a printed image, but in that case, a heater having a considerably large calorific value must be used. . In this way, when the printing material is dried by the drying means such as a heater, the higher the printing speed of the printing press, the more severe the conditions imposed on the drying means. Actually, the printing ink cannot be dried at such a high speed that an effect of preventing the occurrence of set-off and strike-through can be obtained.

In addition, depending on the printing method, fine powder such as starch or talc may be applied to the printed image surface to prevent set-off. However, such a fine powder coating device uses compressed air, and a printing device equipped with such a device becomes a considerably large printing device.

Further, the printing target after the printing is completed is a paper discharge tray,
When transporting to a sorter, etc.
The conveyance roller cannot be applied to the printed image surface of the printing medium. For this reason, conventionally, the printing medium has been transported by a transportation mechanism such as a belt conveyor that contacts only the back surface (non-printing image surface) of the printing medium. This type of printing medium conveying device is disclosed in, for example, Japanese Patent Application Laid-Open No. 50-88769.

However, if the printed material is conveyed by contacting only the back surface without contacting the printed image surface, when the copying paper is forcibly conveyed while being sandwiched from both sides like a copying machine such as a PPC. In comparison, the paper ejection performance is inferior, such as the occurrence of paper misalignment at the delivery destination such as the paper ejection tray or the sorter. This tendency has become remarkable as the printing speed, in other words, the paper discharge speed is increased. Further, such a problem greatly reduces the degree of freedom in setting the route of the sheet discharge conveyance path in the printing apparatus.

In addition, it has been proposed to transfer excess printing ink on the printed image surface to a roller which comes into contact therewith, and remove the printing ink removed on the roller by a cleaning means using a blade. In the method, the excess ink removing liquid may leak from the contacting roller.

[0010]

The present inventors have invented a novel apparatus for removing excess ink from a printing medium in order to improve printing quality. This apparatus has a contact roller that rotates by applying a surplus ink removing liquid in a layered manner on the peripheral surface, and a counter roller that rotates in opposition to the contact roller,
The printed material is sandwiched and conveyed by the contact roller and the facing roller. Then, the excess printing ink on the printed image surface of the printing medium is transferred to the layered excess ink removing liquid of the contact roller, and the excess ink on the contact roller is a cleaning means such as a blade that contacts the contact roller. Remove by.

In the above apparatus, a liquid that is incompatible with the printing ink and has a surface tension lower than that of the printing ink is used as the excess ink removing liquid, and this liquid is applied in a layered manner to the contact roller. The ink removal liquid sometimes leaked from the contact roller.

The present invention is aimed at improving the above-mentioned apparatus for removing excess ink, which has been proposed by the inventors of the present application, by paying attention to the conventional problems as described above. Be sure to avoid the occurrence of set-off and strike-through without inducing other obstacles, and to prevent the excess ink removal liquid from leaking from the contact member, while reliably removing the excess printing ink on the printed image surface. It is an object of the present invention to provide a printed image post-processing device capable of performing the above.

[0013]

According to a first aspect of the present invention, there is provided a printed image post-treatment device, which is applied with an excess ink removing liquid which is incompatible with the printing ink for forming a printed image and has a lower surface tension than the printing ink. A contact member that is driven to rotate, and a facing member that brings the printed surface of the printed material into contact with the surplus ink removing liquid of the contact member by conveying the printed material with the printed material sandwiched between the contact member. A supply means for supplying the excess ink removing liquid to the contact member, and a cleaning means for slidingly contacting the contact member to scrape off the excess ink removing liquid,
And a liquid leakage prevention member for slidingly contacting an end surface or an outer peripheral surface of the contact member and collecting excess ink removing liquid leaking from the contact member by scraping by the cleaning unit.

According to a second aspect of the present invention, there is provided a printed image post-processing device, which comprises a contact member which is rotatably driven by applying an excess ink removing liquid which is incompatible with the printing ink forming the printed image and has a lower surface tension than the printing ink. , An opposing member that brings the printed surface of the printed material into contact with the surplus ink removing liquid of the contact member by sandwiching and carrying the printed material between the contact member, and removing the surplus ink on the contact member A supply means for supplying a liquid and a cleaning means for slidingly contacting the contact member to scrape off excess ink removing liquid and a cleaning means for slidingly contacting an end face or an outer peripheral surface of the facing member and leaking from the contact member by scraping by the cleaning means. And a liquid leakage prevention member for collecting the excess ink removing liquid.

According to a third aspect of the present invention, the liquid leakage prevention member is provided in sliding contact with the outer peripheral surface of the counter member, and the excess ink removing liquid collected by the counter member is rotated by the counter member to rotate the peripheral surface. A configuration may be adopted in which the liquid is pumped toward the contact member via the.

According to a fourth aspect, the contact member comprises:
A contact roller that sandwiches the printed material between the facing member and the facing member can be used.

According to a fifth aspect, the contact member comprises:
It may be configured by an endless belt that is stretched between a plurality of rollers.

[0018]

The surplus ink removing liquid adhering to the peripheral surface of the contact member comes into contact with the printed image surface of the printing medium. The surplus of the printing ink forming the printed image is transferred to the surplus ink removing liquid of the contact member and is removed from the printing medium. The excess ink remover is incompatible with the printing ink that forms the printed image,
The surface tension of the liquid is lower than that of the printing ink.
Therefore, the surplus printing ink transferred to the surplus ink removing liquid exists on the surface of the surplus ink removing liquid in a floating state that is physically separated from the surplus ink removing liquid. The surplus printing ink floating in the surface of the contact member is removed from the contact member together with the surplus ink removing liquid by the cleaning unit that comes into contact with the surface of the contact member as the contact member rotates. It is dispersed in the excess ink removing liquid in the liquid pool formed during the period. A liquid leakage prevention member is in sliding contact with the end surface of the contact member, and the excess ink removing liquid leaking toward the end surface of the contact member when scraped by the cleaning means is collected by the liquid leakage prevention member. Therefore, the printed image surface is not contaminated with the excess ink removing liquid.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the stencil printing machine of the first embodiment will be described with reference to FIGS. The document image reading unit 5 has an image scanner 3 and reads an image of a document to be printed. The plate making unit 9 has a plate making device 7 and forms a punched image on the stencil printing base paper S in accordance with the document image data read by the document reading unit 5.

On the outer peripheral surface of the cylindrical printing drum 13, the stencil printing base paper S punched by the plate making section 9 is wound. An ink supply device 11 including an ink squeegee device is provided inside the print drum 13, and supplies ink to the inner peripheral surface of the print drum 13. Below the printing drum 13 is a press roller 15 that moves up and down. Press roller 15
Is configured to nip and convey the printing medium P supplied between the printing drum 13 and the press roller 15 between the printing drum 13 and form an image on the printing medium P.

In the paper feeding section 23, the printing medium P on the paper feeding table 17 is fed one by one by the paper separating roller 19 and the press roller 1 by the paper feeding timing roller 21.
5 and the printing drum 13.

In the paper discharge section 33, the stripping claw 25 strips the printing medium from the printing drum 13. The stripped printing material P is transported to the print image post-processing device 29 by the transport device 27 of the belt conveyor mechanism. The print image post-processing device 29 performs a process of removing excess ink from the print image of the printing medium P. The processed printing substrate is the paper output table 31.
It is discharged to and piled up.

The stencil printing base paper sheet S for which printing has been completed is peeled off from the printing drum 13 by the plate discharge portion 35 and discarded.

The printing operation in the above configuration will be described.
The printing drum 13 is rotationally driven in the counterclockwise direction in the figure around its own central axis by a driving unit (not shown). The printing medium P is conveyed from the left side to the right side in the figure by the paper feed timing roller 21 at a predetermined timing synchronized with the rotation of the printing drum 13, and is supplied between the printing drum 13 and the press roller 15. The printing medium P is pressed by the press roller 15 against the stencil sheet S wound around the outer peripheral surface of the printing drum 13, and stencil printing is performed.

The printed substrate P is printed with the peeling claw 25.
Is peeled off from the print drum 13 and is sent to the print image post-processing device 29 by the paper discharge conveying device 27 with the print image surface facing upward. The printing medium P is the print image post-processing device 2
The sheet 9 is conveyed toward the sheet discharge tray 31 while being subjected to the post-processing operation of the print image, and is stacked on the sheet discharge tray 31.

Next, the structure and operation of the print image post-processing device 29 will be described. As shown in FIG. 2, the print image post-processing device 29 includes a contact roller 37 as a contact member that contacts the print image surface (upper surface) of the printing target P after printing is completed.
And a counter roller 39 as a counter member that is arranged to face the contact roller 37. The contact roller 37 and the counter roller 39 are rotatably supported in parallel with each other by shafts 41 and 43, respectively. The opposing roller 39 is urged upward in the figure, that is, toward the contact roller 37 by a spring as an urging means (not shown). When there is no printing target P between the contact roller 37 and the counter roller 39, the contact roller 37 and the counter roller 39 contact each other.

A blade 45, which is a plate-shaped member having a substantially rectangular cross section, is in contact with the outer peripheral surface 37a (surplus ink removing liquid application surface) of the contact roller 37. The blade 45 has a base end fixed to the tip of the sheet metal member, and the tip is in contact with the contact roller 37.

The contact roller 37, the counter roller 39, and the blade 45 are made of a material that does not cause swelling or other deterioration due to the excess ink removing liquid. When the main component of the excess ink removing liquid is, for example, silicone oil, the contact roller 37, the facing roller 39, and the blade 45 reduce the friction coefficient with the contact roller 37, and therefore, are preferably made of a fluorine-based material (rubber). However, the material such as phenyl-modified silicone resin (rubber) is not particularly limited.

A surplus ink removing liquid supply nozzle 47 is provided above the outer peripheral surface 37a of the contact roller 37 on the front side in the rotation direction from the contact position between the blade 45 and the contact roller 37.
Is provided. Excess ink removal liquid supply nozzle 47
Is for removing the excess ink removing liquid from the outer peripheral surface 3 of the contact roller 37.
It is a supply means for supplying to 7a. Excess ink remover is
It is a liquid that is incompatible with the printing ink forming the printed image and has a surface tension lower than that of the printing ink. The amount of the excess ink removing liquid supplied to the blade 45 depends on the contact roller 3
It is preferable that the amount is larger than the amount of printing ink transferred to No. 7, and it is determined by the dispersive power of the excess ink removing liquid.

When the excess ink removing liquid supply nozzle 47 supplies the excess ink removing liquid to the outer peripheral surface 37a of the contact roller 37, the excess ink removing liquid accumulates between the blade 45 and the contact roller 37 as shown in the figure. . Contact roller 37
With the rotation of, the excess ink removing liquid passes between the contact roller 37 and the blade 45 to form a layer on the surface of the contact roller 37. At this time, the blade 45 has a function of making the amount of the excess ink removing liquid formed on the outer peripheral surface 37a of the contact roller 37 uniform. Further, the blade 45 also functions as a cleaning unit that removes dirt on the outer peripheral surface 37a of the contact roller 37.

The surplus ink removing liquid used in this embodiment is incompatible with the printing ink for forming a printed image on the printed image surface of the printing medium P, and its surface tension is lower than that of the printing ink. It is a low liquid. Examples of the liquid satisfying this condition include dimethyl silicone oil and modified silicone oil such as phenyl, polyether, fluorine, amino, epoxy, carboxyl, carbinol, methacryl, mercapto, and phenol.

In addition to this, an aqueous solution containing a surfactant or an organic solvent may be used as the excess ink removing liquid.

Surfactants to be added to water include anionic, cationic, and amphoteric ionic and nonionic surfactants. The amount of this surfactant added depends on the surface tension of the excess ink removing liquid. It is determined to be lower than the surface tension of the printing ink.

The organic solvent added to water is an organic solvent compatible with water, and examples thereof include methanol, ethanol, isopropyl alcohol, n-propyl alcohol, ethylene glycol and glycerin.

The excess ink removing liquid is used for the contact roller 3
7 is evenly coated on the outer peripheral surface 37a, and the coating thickness is preferably about 0.0001 to 1 μm. Converting this to the amount of coating on the material to be printed, 0.1-100 mg / B
It will be about 4 sizes.

On the front side of the blade 45 with respect to the rotating direction of the contact roller 37, a sheet-like elastic body 49 is provided as a means for collecting the excess ink removing liquid. The sheet-shaped elastic body 49 is a thin plate-shaped member having a predetermined elasticity. At the contact point d located on the front side in the rotation direction of the contact roller 37 with respect to the contact position between the blade 45 and the contact roller 37,
The tip of the sheet-like elastic body 49 is in contact with the outer peripheral surface 37 a of the contact roller 37. Further, the sheet-shaped elastic body 49
Is arranged at a position closer to the contact roller 37 than the tangent line e of the contact roller 37 at the contact point d, and the rear end thereof is lower than the front end. Therefore, a part of the sheet-like elastic body 49 near the tip end portion is brought into close contact with the outer peripheral surface 37a of the contact roller 37 with a predetermined length.
It is elastically deformed following the shape of a.

The rear end portion of the sheet-like elastic body 49 is fixed to the tray member 51 for the excess ink removing liquid, which is arranged below the contact point d. The leading end of the sheet-like elastic body 49 is a free end and is in contact with the contact roller 37 as described above. In this way, the sheet-like elastic body 49 is arranged so that the free end of the elastic body 49 contacts the contact roller 37 and the fixed rear end of the elastic body 49 is positioned downward.

These contact roller 37 and counter roller 39
On both sides of the liquid leakage prevention member 53 over a predetermined range.
Is provided. The liquid leakage prevention member 53 shown in FIG. 2 has a substantially J-shape that is in sliding contact with a part of the end surface of the contact roller 37 and the lower half of the end surface of the counter roller 39. In the liquid leakage prevention member 53, the portion in sliding contact with the contact roller 37 and the counter roller 39 is made of a material capable of absorbing the excess ink removing liquid. For example, a non-woven fabric, a woven fabric, or a porous material such as a sponge can be used.

Next, the operation of the print image post-processing device 29 configured as described above will be described. The printed object P that has been printed is conveyed by being sandwiched between the contact roller 37 and the counter roller 39. The surplus ink removing liquid film a formed on the outer peripheral surface 37a of the contact roller 37 contacts the print image surface of the printing medium P. Due to this contact, of the printing ink b forming the print image on the printing medium P, the surplus printing ink is transferred to the surplus ink removing liquid film a of the contact roller 37, and the surplus printing ink is printed. Removed from body P.

Excess ink removing liquid film a of the contact roller 37
The printing ink c transferred to the sheet passes through the sliding contact portion between the sheet elastic body 49 and the contact roller 37 as the contact roller 37 rotates.

The surplus ink removing liquid used in this embodiment is a liquid which is incompatible with the printing ink b forming a printed image and whose surface tension is lower than that of the printing ink c. Therefore, the surplus printing ink transferred to the surplus ink removing liquid exists on the surface of the surplus ink removing liquid in a floating state physically separated from the surplus ink removing liquid.

The excess ink removing liquid film a containing the excess printing ink c on the contact roller 37 is scraped off by the blade 45. That is, as the contact roller 37 rotates, the excess printing ink is removed from the contact roller 37 by the blade 45 together with the excess ink removing liquid. Then, a surplus ink removing liquid pool f containing the printing ink c is generated on the front side of the blade 45 in the rotation direction of the contact roller 37, and the printing ink removed from the contact roller 37 by the blade 45 is a surplus ink removing liquid pool. dispersed in f.

A part of the excess ink removing liquid pool f leaks from both sides of the contact roller 37, and the leaked excess ink removing liquid is collected by the liquid leakage preventing member 53.
That is, the leaked excess ink removing liquid comes into contact with the liquid leakage prevention member 53 by the rotation of the contact roller 37. The excess ink removing liquid absorbed by the liquid leakage prevention member 53 moves toward the lower portion of the liquid leakage prevention member 53 by its own weight, and finally collects at the lowermost portion of the liquid leakage prevention member 53.

The surplus ink removing liquid film a containing no printing ink c is regenerated on the outer peripheral surface 37a of the contact roller 37 after passing the blade 45. The contact roller 37 re-contacts with the print image surface of the printing object P by this surplus ink removing liquid film a, so that the print image surface of the printing object P is stained by the printing ink c transferred to the contact roller 37. There is no.

Outer peripheral surface 3 of blade 45 and contact roller 37
Since the contact position with 7a is on the front side in the direction of rotation from the apex of the contact roller 37, if the amount of the liquid in the excess ink removing liquid pool f exceeds a certain limit, the excess ink is generated even if the contact roller 37 is rotating. The excess ink removing liquid in the removing liquid reservoir f begins to flow in the direction opposite to the rotating direction of the contact roller 37 due to its own weight. The flow of the excess ink removing liquid is guided by the inclined upper surface of the sheet-like elastic body 49 and flows to the receiving tray 5
It falls into 1 and is collected.

As described above, the material P to be printed has the contact roller 3
By passing between 7 and the counter roller 39, the surplus of the printing ink b forming the print image as described above is reliably removed from the outer peripheral surface 37a of the contact roller 37. This suppresses the occurrence of set-off and strike-through on the printed substrate, and prevents the printed image from collapsing even if the printed image surface is rubbed with a fingertip or the like immediately after the paper is ejected, and further forms the printed image. The drying of the printing ink b present becomes faster.

The liquid leakage prevention member 53 is the contact roller 3
7 and the opposing roller 39 are in contact with both end surfaces of the J-shape, the contact roller 37 is divided into other shapes.
It is also possible to adopt a configuration in which only the contact roller 39 or only the opposing roller 39 is in contact.

Next, FIG. 3 is a perspective view showing a second embodiment of the present invention, in which the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof is omitted. In this embodiment, liquid leakage prevention members 45a are formed on both end portions of the blade 45 so as to project therefrom. The liquid leakage prevention member 45a is pressed in the direction of the shaft 41 and is in close contact with the contact roller 37. However, if the liquid leakage prevention member 45a and the contact roller 37 and the blade 45 have poor adhesion, the excess ink removing liquid leaks from the gap toward the end surface of the contact roller 37.

The liquid leakage prevention member 53 of this embodiment is in sliding contact with the end faces of the contact roller 37 and the counter roller 39 as in the above-mentioned embodiment, and further has a collecting portion 53a for collecting excess ink removing liquid at the lower end. It is provided. Therefore, the excess ink removing liquid dropped due to its own weight is collected by the collecting unit 53.
It is stored in a and this collected thing is the pipe 58 such as rubber.
Can be collected by.

Next, FIG. 4 is a perspective view showing a third embodiment of the present invention. The liquid leakage prevention member 53 of this embodiment has a half-cylindrical sliding contact portion 53b that is in sliding contact with the end surfaces of the contact roller 37 and the opposing roller 39 and is in contact with the lower half of the outer peripheral surface of the opposing roller 39. ing. Liquid leakage prevention member 45
The excess ink removing liquid leaking from the side portion of a to the end surface side of the contact roller 37 is stored in the sliding contact portion 53b by a predetermined amount by its own weight. By the rotation of 39, the opposing roller 39
From the outer peripheral surface of the contact roller 37 to the outer peripheral surface of the contact roller 37.

As a result, the excess ink removing liquid transferred to the outer peripheral surface of the contact roller 37 can be collected by the sheet-like elastic body 49 which is the collecting means. The direct contact between the facing roller 39 and the contact roller 37 occurs in the case of the sheet-shaped printing material other than the continuous paper, and these contact rollers 37 are kept for a predetermined period during the feeding of the sheet-shaped printing material. And the opposing roller 39 come into direct contact with each other, and the excess ink removing liquid is pumped up during the period of this direct contact.

Next, FIG. 5 is a perspective view showing a fourth embodiment of the present invention. The liquid leakage prevention member 56 of this embodiment is formed of a blade made of rubber or the like in the shape of a plate, and is arranged so as to be inclined with respect to the contact roller 37. This liquid leakage prevention member 5
One end portion 56 a of 6 is in contact with the end surface of the contact roller 37. The end portion 56b is in contact with a part of the outer peripheral surface of the contact roller 37. Here, the end portion 56b is the contact roller 3
7 is in contact with the edge of the outer peripheral surface.

According to the liquid leakage prevention member 56, the excess ink removing liquid leaking from the liquid leakage prevention member 45a to the end face side of the contact roller 37 is dammed up by the liquid leakage prevention member 56, and the liquid leakage prevention member 56. It can be dropped to the upper part, collected in the collecting part 56d, and collected by the pipe 58 of rubber or the like. At this time, the liquid leakage prevention member 5
A restriction wall 56c is provided on each of both sides of 6, so that the excess ink removing liquid is prevented from falling off from the side when dropped, and is guided to the collecting portion 56d.

Next, FIG. 6 is a diagram showing a fifth embodiment of the present invention. In this embodiment, a flexible endless belt 63 is stretched between two rollers 59 and 61 which are vertically spaced apart from each other with a predetermined tension. When the excess ink removing liquid cannot be dammed up by the liquid leakage prevention member 45a and leaks, the leaking excess ink removing liquid travels along the endless belt 63 and moves to the opposing roller 39 by its rotation. . This means that if the endless belt 63 and the counter roller 39 are always in contact with each other, and if the printing medium P is not between the endless belt 63 and the counter roller 39, the endless belt 63 directly contacts. These endless belt 63 and opposing roller 3
The direct contact with the sheet 9 occurs in the case of the sheet-shaped printing material excluding the continuous paper, and the endless belt 63 and the facing roller 39 are in direct contact with each other for a predetermined period while the sheet-shaped printing material is fed. Will be done.

As a result, the leaked excess ink removing liquid that has moved to the opposing roller 39 is collected by the liquid leakage prevention member 57. The liquid leakage prevention member 57 is formed in a substantially U-shape that is in sliding contact with the lower half of the outer circumference of the opposing roller 39.

[0056]

According to the present invention, a contact member such as a contact roller comes into contact with the printed image surface of a printing paper by means of the surplus ink removing liquid layer formed on the peripheral surface of the contact member, and by this contact, the printed image surface is formed. Excessive printing ink out of the printing ink that forms the printed image is completely removed, so the occurrence of set-off and strike-through on the printed substrate can be reliably prevented without inducing other obstacles. In addition, even if the printed image surface is rubbed with a fingertip or the like immediately after the paper is discharged, the printed image is less likely to collapse.
Since the excess ink removing liquid is a liquid that is incompatible with the printing ink that forms the printed image and has a surface tension lower than the surface tension of the printing ink, the printing ink transferred to the excess ink removing liquid layer is the excess ink. The surplus ink removing liquid is present on the surface of the removing liquid layer in a floating state that is physically separated. The printing ink in the floating state is dispersed in the excess ink removing liquid at the liquid pool of the excess ink removing liquid formed on the blade portion which is the plate-like cleaning means. Even if the excess ink removing liquid leaks toward the end surface of the contact roller when it is scraped off by the blade portion, it can be reliably recovered by the liquid leakage prevention member that is in sliding contact with the end surface of the contact roller. The liquid leakage prevention member can also be provided in sliding contact with the end surface of the facing member, so that excess ink leaked from the contact member to the facing member can be collected. If the liquid leakage prevention member is in contact with the end surface and the outer peripheral surface of the facing member, the excess ink removing liquid that has leaked to the facing member can be pumped upward through the outer peripheral surface by the rotation of the facing member. Therefore, it can be sent to the collecting means in contact with the outer peripheral surface of the contact member via the outer peripheral surface of the contact member.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a configuration diagram of a print image post-processing device in FIG.

FIG. 3 is a diagram illustrating another configuration example of a print image post-processing device.

FIG. 4 is a diagram showing another configuration example of a print image post-processing device.

FIG. 5 is a diagram showing another configuration example of a print image post-processing device.

FIG. 6 is a diagram showing another configuration example of a print image post-processing device.

[Explanation of symbols]

 29 Print Image Post-Processing Device 37 Contact Roller as Contact Member 39 Opposing Roller as Opposing Member 45 Blade as Cleaning Means 47 Excess Ink Removal Liquid Supply Nozzle as Supplying Means 53, 56, 57 Liquid Leak Prevention Member 63 As Contacting Member Endless belt P Printed material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Isozaki 2-20-15 Shimbashi, Minato-ku, Tokyo Ideal Science Kagaku Kogyo Co., Ltd.

Claims (5)

[Claims] 1. A contact member, which is rotatably driven by applying a surplus ink removing liquid having a surface tension lower than that of the printing ink and which is incompatible with the printing ink for forming a printed image, and printed between the contact member. An opposing member for bringing the printing surface of the printing object into contact with the excess ink removing liquid of the contact member by conveying the printing object with the feeding member, and a supply unit for supplying the excess ink removing liquid to the contact member, the contact Cleaning means for sliding contact with a member to scrape off excess ink removing liquid, and liquid contact for sliding contact with the end surface or outer peripheral surface of the contact member to collect excess ink removing liquid leaking from the contact member by scraping off the cleaning means A printed image post-processing device comprising: a member. 2. A contact member which is rotatably driven by applying a surplus ink removing liquid having a surface tension lower than that of the printing ink and which is incompatible with the printing ink for forming a printed image, and printed between the contact member. An opposing member for bringing the printing surface of the printing object into contact with the excess ink removing liquid of the contact member by conveying the printing object with the feeding member, and a supply unit for supplying the excess ink removing liquid to the contact member, the contact Cleaning means for sliding contact with a member to scrape off excess ink removing liquid, and liquid contact for sliding contact with the end surface or outer peripheral surface of the facing member to recover excess ink removing liquid leaking from the contact member by scraping off the cleaning means A printed image post-processing device comprising: a member. 3. The liquid leakage prevention member is provided in sliding contact with the outer peripheral surface of the facing member, and the excess ink removing liquid recovered by the facing member is rotated by the facing member to pass through the outer peripheral surface of the contact member. 3. The printed image post-processing apparatus according to claim 2, wherein the printed image post-processing apparatus is configured to scoop in a direction. 4. The printed image post-processing apparatus according to claim 1, wherein the contact member is a contact roller that holds a printed object to be printed between the contact member and the facing member. 5. The printed image post-processing apparatus according to claim 1, wherein the contact member is an endless belt stretched between a plurality of rollers.