JP2001219542A - Ink supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly converge a printing density to a target value immediately after starting printing. SOLUTION: An ink supplied from an ink fountain 1 is preliminarily supplied in a state in which a downstream side roller 9 is separated from a predetermined upstream side roller 8 of a plurality of rolls 2, 5, 3, 6, 7, 8, 9 and 10 prior to starting printing. In this case, the ink supplied from the ink fountain 1 to the roller 8 is consumed by ink consuming mechanisms 18, 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ink supply device for a printing press such as an offset printing press.

[0002]

2. Description of the Related Art FIG. 10 is a schematic side view showing the structure of an ink supply device in a printing unit of an offset printing machine. The outline of the conventional ink supply device will be described with reference to FIG. 1. Ink stored in the ink fountain 1 is applied to the peripheral surface of the ink fountain roller 2 by rotation of the ink fountain roller 2 forming a part of the ink fountain 1. It adheres and is sent out from the ink fountain 1.

[0003] The ink source roller 2 includes
And a call roller 5 that swings back and forth between the ink receiving roller 3 and the downstream ink receiving roller 3 is in periodic contact. The call-up roller 5 scrapes ink adhering to the peripheral surface of the ink source roller 2 at the time of contact with the ink source roller 2 and transfers the ink scraped at the time of contact with the ink receiving roller 3 to the ink receiving roller 3.

[0004] The ink delivered to the ink receiving roller 3 is appropriately kneaded in a process of sequentially transferring various ink roller groups (hereinafter, also simply referred to as rollers) 6 disposed downstream of the ink receiving roller 3. Is supplied to a plate cylinder 8 on which a plate to be printed is mounted via a plurality of inking rollers 7. The ink adhering to the plate of the plate cylinder 8 is transferred to the blanket cylinder 9 which is in contact with the plate cylinder 8, and further transferred between the blanket cylinder 9 and the impression cylinder 10 (printing portion) on the paper surface of the paper 11. . Thus, printing on the paper 11 is completed. The paper 11 to be printed is conveyed while being held by nails (not shown) attached to the impression cylinder 10. Further, in order to prevent the ink from adhering to the non-image area of the plate, dampening water is supplied to the plate cylinder 8 from the watercraft 12 via the water supply roller 13 by the watering roller 14.

When printing is performed steadily, the ink film thickness on each of the rollers 2, 5, 3, 6, 7, 8, and 9 has a difference from upstream to downstream. That is, FIG.
As shown by the solid line in FIG. 1, a step-like ink film thickness distribution occurs in which the ink film thickness gradually decreases from upstream to downstream. In FIG. 11, each roller is arranged in order from the upstream side on the vertical axis, and the ink film thickness of each roller is shown on the horizontal axis. With respect to the ink roller group 6, the ink film thickness of one of the rollers constituting the ink roller group 6 (indicated by reference numeral 15 in FIG. 10) is shown as a representative.

By the way, as described above, the ink is sequentially supplied from the ink fountain 1 to each of the rollers 2, 5, 3, 6, with the operation of the apparatus.
The ink is supplied to the ink fountain 1 at the start of printing and at the same time as printing is started.
Due to the time lag until the ink reaches the blanket cylinder 9, the blank paper 11 on which the printing is not performed on the paper surface is conveyed as a printed matter. Even when the ink reaches the blanket cylinder 9, each roller 2, 5, 3, 6, 7,
Since the amount of ink held in the items 8 and 9 is small, it takes time to reach the target density, and during that time, many waste papers, that is, prints having no commercial value and not reaching the target density are generated.

Therefore, in the conventional ink supply apparatus, before the printing is started, the ink is supplied in advance from the ink fountain 1 and the ink is wound on the rollers 2, 5, 3, 6, and 7, and the preliminary supply of the ink is performed. ing. The preliminary supply of this ink is shown in FIG.
2, the ink forming roller 7 and the water forming roller 1
4 is separated from the plate cylinder 8, and ink is supplied from the ink fountain 1 while the rollers 2, 5, 3, 6, and 7 idle. By this idling operation, each roller 2, 5,
A uniform ink film thickness distribution is formed on 3, 6, and 7 as shown by the broken line in FIG. 11, thereby improving the time lag from the start of printing to the actual printing on the paper 11. .

[0008]

However, the ink film thickness distribution in a steady state is not a uniform distribution as shown by a broken line in FIG. 11, but a stepwise flow from upstream to downstream as shown by a solid line in FIG. Because of the stepwise distribution where the concentration becomes thin,
With the start of printing, the ink film thickness distribution changes from a uniform distribution at the time of preliminary supply to a stepwise distribution at a steady state. For this reason, the ink film thickness near the plate also changes with time.
Many waste papers are generated due to a change in the print density of printing performed on the paper 11.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an ink supply apparatus which enables a print density to quickly converge to a target value after printing is started. .

[0010]

In order to achieve the above object, an ink supply device according to the present invention comprises an ink fountain and a plurality of rollers, and the ink of the ink fountain is printed by the printing unit via the plurality of rollers. In the ink supply device of a printing press, the ink is supplied from the ink fountain in a state where a downstream roller in contact with the upstream roller is separated from a predetermined upstream roller of the plurality of rollers before starting printing. In addition to a preliminary supply mode, an ink consumption mechanism that operates in the preliminary supply mode and consumes ink supplied from the ink fountain to the upstream roller is provided.

[0011] Preferably, the upstream roller is a plate cylinder constituting the plurality of rollers, and the downstream roller is a blanket cylinder in contact with the plate cylinder. More preferably, the ink consumption mechanism includes an ink scraping member and an ink consumption roller in contact with the plate cylinder, and in the preliminary supply mode, the ink scraping member is engaged with the ink consumption roller. .

Alternatively, an ink scraping member may be provided as the ink consumption mechanism, and in the preliminary supply mode, the ink scraping member may be provided on an ink forming roller disposed upstream of the plate cylinder for applying ink to the plate cylinder. It is also preferable to configure to engage. Or, as the ink consumption mechanism,
An ink scraping member, and an ink consumption roller disposed upstream of the plate cylinder and in contact with an ink forming roller for adhering ink to the plate cylinder. In the preliminary supply mode, the ink scraping member is connected to the ink consumption roller. It is also preferable to configure to engage with the roller.

Further, it is preferable that the apparatus further comprises a leveling member which is engaged with the roller with which the ink scraping member is engaged to level the ink adhered to the roller.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an ink supply device according to a first embodiment of the present invention. Hereinafter, the present ink supply apparatus will be described with reference to FIGS.
Here, FIGS. 1 and 2 are schematic side views showing the configuration of the present ink supply apparatus, FIG. 1 is a view showing a preliminary supply of ink, and FIG. 2 is a view showing a print time. FIG. 3 is a diagram showing the ink film thickness distribution of each roller for explaining the operation of the present ink supply device. In FIGS. 1 and 2, the same parts as those in the conventional ink supply device described above are denoted by the same reference numerals.

First, the configuration of the present ink supply device will be described. In addition to the configuration of the above-described conventional ink supply device, the present ink supply device further includes a printing function that functions during preliminary supply of ink (preliminary supply mode). It is characterized by having a separate ink consumption system (ink consumption mechanism). That is, as shown in FIGS. 1 and 2, the present ink supply device has an ink consuming roller 18 disposed opposite the plate cylinder 8 and an ink scraping device that scrapes ink attached to the ink consuming roller 18. It has 30. The ink consuming roller 18 is configured to be able to contact and separate from the plate cylinder 8 so as to contact the plate cylinder 8 at the time of preliminary supply, and to contact the plate cylinder 8 at the time of printing.
Away from you. In the present ink supply apparatus, the preliminary supply of the ink is performed by keeping the inking roller 7 and the watering roller 14 in contact with the plate cylinder 8 and the blanket cylinder (downstream roller) 9 with the plate cylinder (upstream roller) 8. It is designed to be performed in a state where it is separated from.

The ink scraping device 30 is provided with an ink scraping blade (ink scraping member) 19 for abutting the tip of the ink scraping roller 18 to scrape the ink, and the ink scraping blade 19 is directed to the ink consuming roller 18. And a load spring 20 for applying pressure to the push key 21. An ink receiving tray 23 for collecting the scraped ink is provided below the tip of the ink scraping blade 19. In the ink scraping device 30, the ink scraping blade 19 is pressed against the ink consumption roller 18 at the time of preliminary supply, and is separated from the ink consumption roller 18 at the time of printing.

Next, the operation and effect of the present ink supply apparatus will be described together with the operation of the present ink supply apparatus at the time of preliminary supply and at the start of printing. First, at the time of preliminary supply of ink, as shown in FIG. 1, with the ink forming roller 7 and the water forming roller 14 in contact with the plate cylinder 8, the impression cylinder 10 is separated from the blanket cylinder 9, and the rubber is separated from the plate cylinder 8. The torso 9 is separated. Then, the ink consumption roller 18 is brought into contact with the plate cylinder 8, and the tip of the ink scraping blade 19 is pressed against the ink consumption roller 18. By bringing the ink consumption roller 18 into contact with the plate cylinder 8, the ink supplied to the plate cylinder 8 from the upstream is transferred to the ink consumption roller 18.
The ink transferred to the ink consumption roller 18 is scraped off by the ink scraping blade 19 and collected in the ink tray 23.

As the ink transferred to the ink consuming roller 18 is scraped off by the ink scraping blade 19 and consumed, the rollers 2, 5, 3,
The ink film thicknesses in 6, 7, and 8 are not uniform, but become thinner downstream as in printing. The ink film thickness distribution in each of the rollers 2, 5, 3, 6, 7, and 8 becomes a step-like ink film thickness distribution as shown by a broken line in FIG. The printing is started when the position approaches and becomes stable. In FIG. 3, the rollers are arranged in order from the upstream side on the vertical axis, and the ink film thickness of each roller is shown on the horizontal axis. The ink film thickness of the ink roller group 6 is representative of the ink film thickness of one of the rollers constituting the ink roller group (hereinafter, also simply referred to as a roller) 6 (indicated by reference numeral 15 in FIGS. 1 and 2). Is shown.

At the start of printing, as shown in FIG.
The ink scraping blade 19 is separated from the ink consuming roller 18, the ink consuming roller 18 is separated from the plate cylinder 8, and the sheet 11 is conveyed to put the blanket cylinder 9 and the impression cylinder 10 in place. That is, the printing is started after the ink scraping blade 19 is separated from the ink consumption roller 18 to stop the ink scraping. The timing at which the ink scraping blade 19 is separated from the ink consumption roller 18 may be synchronized with a cylinder insertion signal (a control signal for bringing the blanket cylinder 9 and the impression cylinder 10 into fixed positions).

By inserting the blanket cylinder 9 and the impression cylinder 10, the ink adhered to the plate cylinder 8 is transferred and supplied to the blanket cylinder 9. Then, the ink film thickness distribution in each of the rollers 2, 5, 3, 6, 7, 8, 9 changes from the distribution state at the time of preliminary supply so as to balance with the consumption of ink by printing. However, each roller 2, 5, upstream of the plate cylinder 8 or higher
Since the ink film thickness distribution in 3, 6, 7, and 8 is already in a distribution state balanced with the ink consumption in the ink consuming roller 18, the blanket cylinder 9 is brought into contact with the plate cylinder 8 to consume the ink by printing. Starting each roller 2,
The variation of the ink film thickness at 5, 3, 6, 7, and 8 is small. For this reason, the print density of the print performed on the paper 11 has little fluctuation, and quickly converges to the target standard print density.

As described above, according to the present ink supply device,
By adding an ink consumption mechanism using an ink scraping blade 19 separate from the printing unit, the ink film thickness distribution on each of the rollers 2, 5, 3, 6, 7, and 8 at the time of preliminary supply can be changed to the distribution at the time of steady printing. Since the state can be approximated, there is an advantage that the printing density can be quickly converged to the target standard printing density at the start of printing, and the waste paper can be reduced.

Next, an ink supply device according to a second embodiment of the present invention will be described with reference to FIGS. Here, FIGS. 4 and 5 are schematic side views showing the configuration of the present ink supply device, FIG. 1 is a diagram showing a preliminary supply of ink, and FIG. 2 is a diagram showing a time of printing. In FIGS. 4 and 5, the same parts as those in the first embodiment are denoted by the same reference numerals.

The present ink supply apparatus is characterized in that, in addition to the structure of the conventional ink supply apparatus, an ink consumption mechanism different from the printing section that functions at the time of preliminary supply of ink is provided as in the first embodiment. However, there is a difference in the configuration of the ink consumption mechanism from the first embodiment. Hereinafter, the configuration of the present ink supply device will be described focusing on the differences from the first embodiment.

As shown in FIGS. 4 and 5, the present ink supply device includes an ink scraping device 30 facing one of the ink forming rollers 7. Ink scraping device 30
Is the same as that described in the first embodiment, but here, the ink attached to the ink forming roller 7 is scraped off. In the present ink supply apparatus, as in the first embodiment, the preliminary supply of the ink is performed by separating the blanket cylinder 9 from the plate cylinder 80 and the impression cylinder 10 while keeping the ink forming roller 7 and the water forming roller 14 in contact with the plate cylinder 8. It is designed to be performed in a state where The ink scraping device 30 presses the ink scraping blade (ink scraping member) 19 against the ink forming roller 7 at the time of preliminary supply, and separates it from the ink forming roller 7 at the time of printing.

With such a configuration, at the time of preliminary supply of ink, the ink adhered to the ink forming roller 7 is scraped off by the ink scraping blade 19 and consumed.
For this reason, the ink film thickness distribution in each of the rollers 2, 5, 3, 6, 7, and 8 becomes a stepwise ink film thickness distribution similarly to the first embodiment (see the broken line in FIG. 3). It approaches the thickness distribution (see the solid line in FIG. 3).

Therefore, at the start of printing, the ink film thickness distribution on each of the rollers 2, 5, 3, 6, 7, 8 upstream of the plate cylinder 8 and above is already close to the steady film thickness distribution. Therefore, even if the blanket cylinder 9 is brought into contact with the plate cylinder 8 and the impression cylinder 10 to start consuming ink by printing, there is little change in the ink film thickness in each of the rollers 2, 5, 3, 6, 7, and 8. For this reason, the print density of the print performed on the paper 11 has little fluctuation, and quickly converges to the target standard print density.

As described above, according to the present ink supply device,
As in the first embodiment, the ink film thickness distribution on each of the rollers 2, 5, 3, 6, 7, and 8 can be made close to the distribution state at the time of steady printing at the time of preliminary supply of ink. Another advantage is that the print density can be stabilized and the waste paper can be reduced. Further, according to the present ink supply device, the ink scraping blade 19 is directly contacted with the ink forming roller 7 without using the ink consuming roller 18, so that the number of parts is reduced and the cost is reduced as compared with the first embodiment. There is also the advantage that it can be done.

Next, an ink supply device according to a third embodiment of the present invention will be described with reference to FIGS. Here, FIGS. 6 and 7 are schematic side views showing the configuration of the present ink supply device, FIG. 6 is a diagram showing a preliminary supply of ink, and FIG. 7 is a diagram showing a time of printing. In FIGS. 6 and 7, the same parts as those in the first and second embodiments are denoted by the same reference numerals.

The present ink supply apparatus is characterized in that the ink forming roller 7 is provided with an ink consumption mechanism different from the printing unit, as in the second embodiment. Are different. Hereinafter, the configuration of the present ink supply apparatus will be described focusing on the differences from the second embodiment. As shown in FIGS. 6 and 7, the present ink supply device has an ink consuming roller 18 disposed opposite to one of the ink forming rollers 7, and an ink scraper that scrapes ink attached to the ink consuming roller 18. Picking device 3
It has 0. That is, in the present ink supply device, instead of directly scraping the ink from the ink forming roller 7, the ink attached to the ink forming roller 7 is transferred to the ink consuming roller 18, and the ink is scraped from the ink consuming roller 18. Has become.

The ink consuming roller 18 is configured so as to be able to be separated from and brought into contact with the ink forming roller 7, and comes into contact with the ink forming roller 7 at the time of preliminary supply and at the time of printing.
Away from you. Further, the ink scraping device 30 presses an ink scraping blade (ink scraping member) 19 against the ink consumption roller 18 at the time of preliminary supply, and separates it from the ink consumption roller 18 at the time of printing. In the present ink supply apparatus, as in the second embodiment, the preliminary supply of ink is performed while the ink forming roller 7 and the water forming roller 14 are kept in contact with the plate cylinder 8 while the blanket cylinder 9 is in contact.
In a state separated from the plate cylinder 8 and the impression cylinder 10.

With this configuration, at the time of preliminary supply of ink, the ink adhering to the ink forming roller 7 is transferred to the ink consuming roller 18 and transferred to the ink scraping blade 19.
Is scraped off and consumed. For this reason, the ink film thickness distribution in each of the rollers 2, 5, 3, 6, 7, and 8 becomes a stepwise ink film thickness distribution similarly to the first and second embodiments (see the broken line in FIG. 3). It approaches the normal film thickness distribution (see the solid line in FIG. 3).

Therefore, also in the present ink supply apparatus, at the start of printing, the ink film thickness distribution on the rollers 2, 5, 3, 6, 7, 8 upstream of the plate cylinder 8 is already the film thickness distribution in the steady state. Therefore, even if the blanket cylinder 9 is brought into contact with the plate cylinder 8 to start consuming ink by printing, the fluctuation of the ink film thickness in each of the rollers 2, 5, 3, 6, 7, 8 is Few. For this reason, the print density of the print performed on the paper 11 has little fluctuation, and quickly converges to the target standard print density.

As described above, according to the present ink supply device,
As in the first and second embodiments, the printing density can be quickly stabilized from the start of printing, and the number of waste sheets can be reduced. Since the ink is scraped off via the ink consuming roller 18 instead of the ink, the ink scraping blade 19 of the ink setting roller 7 is used.
There is an advantage that wear due to contact with the ink can be prevented, and a reduction in the life of the ink forming roller 7 can be prevented.

Finally, an ink supply device according to a fourth embodiment of the present invention will be described with reference to FIGS. 8 and 9 are schematic side views showing the configuration of the present ink supply device. FIG. 8 is a diagram showing preliminary ink supply.
FIG. 9 is a diagram showing a state at the time of printing. 8 and 9, the same parts as those in the first to third embodiments are denoted by the same reference numerals in the drawings.

The present ink supply apparatus is characterized in that, in addition to the structure of the first embodiment, means for making the ink film uniform is further provided. That is, as shown in FIGS. 8 and 9, the rider roller (leveling member) 26 is newly added.
The lid roller 26 and the ink consuming roller 18
Contact. As in the first embodiment, the ink consuming roller 18 comes into contact with the plate cylinder 8 at the time of preliminary supply, and separates from the plate cylinder 8 at the time of printing. Further, the ink scraping device 30 presses an ink scraping blade (ink scraping member) 19 against the ink consumption roller 18 at the time of preliminary supply, and separates it from the ink consumption roller 18 at the time of printing. In addition, even with this ink supply device,
As in the first embodiment, the preliminary supply of ink is performed while the blanket cylinder 9 is separated from the plate cylinder 8 and the impression cylinder 10 while the ink forming roller 7 and the water forming roller 14 are kept in contact with the plate cylinder 8. Has become.

With this configuration, during the preliminary supply of ink, the ink adhering to the plate cylinder 8 is removed by the ink consuming roller 1.
8 and is scraped off by the ink scraping blade 19 and consumed. Therefore, each roller 2, 5, 3,
As in the first and second embodiments, the ink film thickness distribution in Steps 6, 7, and 8 is a stepwise ink film thickness distribution (see the broken line in FIG. 3), and the film thickness distribution in a steady state (solid line in FIG. 3). See). At this time, the uneven portion of the ink film thickness caused by the poor scraping of the ink scraping blade 19 is leveled and made uniform by the rider roller 26.

Therefore, also in the present ink supply apparatus, at the start of printing, the ink film thickness distribution on each of the rollers 2, 5, 3, 6, 7, 8 upstream of the plate cylinder 8 is already in the steady state. , The fluctuation of the ink film thickness at the start of printing is small, and quickly converges to the target standard print density. In addition, since the portions where the ink film thickness is non-uniform are leveled by the rider roller 2, there is little change in print density due to the non-uniform ink film thickness.

As described above, according to the present ink supply device,
As in the first to third embodiments, the print density can be quickly stabilized from the start of printing, the waste paper can be reduced, and the uneven portion of the ink film thickness caused by poor scraping can be removed by a lid roller. 26, there is an advantage that fluctuations in the ink film thickness distribution due to poor scraping can be prevented, and fluctuations in print density can be further reduced.

Although the four embodiments of the ink supply device of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Can be implemented. For example, an ink scraping blade 19 is engaged with the plate cylinder 8 to
The ink may be scraped directly from the ink. Further, a rider roller 26 as a leveling member according to the fourth embodiment is used.
Can be added to the configuration of the second embodiment or the third embodiment. That is, the ink consuming roller 1 that is engaged with the ink forming roller 7 or contacts the ink forming roller 7.
8 may be engaged. The leveling member is not limited to a roller, and may be, for example, a plate-shaped member.

Further, the ink consuming mechanism is not limited to the one using the ink scraping member for scraping the ink on the roller as in each of the above-described embodiments. For example, a structure in which the ink on the roller is wiped off is used. Or a structure that absorbs ink on the roller.
Further, in each of the above-described embodiments, the plate cylinder is an upstream roller, the blanket cylinder is a downstream roller, and the blanket cylinder is separated from the blanket cylinder during preliminary supply. However, the present invention is not limited to this, and preliminary supply can be performed by separating between any rollers. In this case, an ink consumption mechanism may be provided so as to consume the ink supplied to the separated upstream roller.

[0041]

As described above in detail, according to the ink supply apparatus of the present invention, preliminary supply of ink can be performed while consuming ink supplied from the ink fountain to the upstream roller by the ink consumption mechanism. Therefore, the ink film thickness distribution on each roller from the ink fountain to the upstream roller can be made closer to the distribution state at the time of steady printing, and at the start of printing, the print density quickly converges to the target value to reduce waste paper. There is an advantage that it can be performed (claim 1).

In particular, when the upstream roller is a plate cylinder and the downstream roller is a blanket cylinder in contact with the plate cylinder, the ink film thickness distribution on each roller up to the plate cylinder is close to the distribution state at the time of steady printing. Therefore, there is an advantage that the print density can be more quickly converged to the target value at the start of printing (claim 2). In addition, as an ink consumption mechanism,
In the case where the ink scraping member and the ink consumption roller in contact with the plate cylinder are provided, and the ink scraping member is configured to be engaged with the ink consumption roller in the preliminary supply mode,
There is an advantage that the ink attached to the plate cylinder can be efficiently consumed by scraping the ink by the ink scraping member (claim 3).

When the ink scraping member as the ink consumption mechanism is configured to be engaged with the ink forming roller, the ink can be efficiently consumed by scraping the ink by the ink scraping member. There is an advantage that cost can be reduced by reducing the number of parts (claim 4). In addition, when the ink consumption mechanism includes an ink scraping member and an ink consumption roller in contact with the ink forming roller, and in a preliminary supply mode, the ink scraping member is engaged with the ink consumption roller, the ink scraping member is provided. Ink can be efficiently consumed by scraping the ink by the scraping member, and since the ink scraping member does not directly contact the ink forming roller, the life of the ink forming roller can be prevented from being shortened due to wear. There is an advantage (claim 5).

Further, if the ink scraping member is engaged with the above-mentioned roller to be engaged with the roller, and the ink scraping member is provided with a leveling member for leveling the ink adhered to the roller, the unevenness of the ink film thickness caused by the defective scraping is provided. Since uniform portions can be leveled, there is an advantage that fluctuations in the ink film thickness distribution due to poor scraping can be prevented, and fluctuations in print density can be further reduced (claim 6).

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a configuration of an ink supply device as a first embodiment of the present invention, showing a configuration at the time of preliminary supply of ink.

FIG. 2 is a schematic side view illustrating a configuration of an ink supply device according to a first embodiment of the present invention, and is a diagram illustrating a configuration during printing.

FIG. 3 is a diagram showing an ink film thickness distribution of each roller according to the ink supply device as the first embodiment of the present invention.

FIG. 4 is a schematic side view showing a configuration of an ink supply device according to a second embodiment of the present invention, showing a configuration at the time of preliminary supply of ink.

FIG. 5 is a schematic side view illustrating a configuration of an ink supply device according to a second embodiment of the present invention, illustrating a configuration during printing.

FIG. 6 is a schematic side view showing a configuration of an ink supply device according to a third embodiment of the present invention, showing a configuration at the time of preliminary supply of ink.

FIG. 7 is a schematic side view illustrating a configuration of an ink supply device according to a third embodiment of the present invention, illustrating a configuration during printing.

FIG. 8 is a schematic side view showing a configuration of an ink supply device according to a fourth embodiment of the present invention, showing a configuration at the time of preliminary supply of ink.

FIG. 9 is a schematic side view illustrating a configuration of an ink supply device according to a fourth embodiment of the present invention, illustrating a configuration during printing.

FIG. 10 is a schematic side view illustrating a configuration of a conventional ink supply device, and is a diagram illustrating a configuration during printing.

FIG. 11 is a diagram showing an ink film thickness distribution of each roller according to a conventional ink supply device.

FIG. 12 is a schematic side view showing a configuration of a conventional ink supply device, and is a diagram showing a configuration at the time of preliminary supply of ink.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Ink fountain 2 Ink source roller 3 Ink receiving roller 5 Recall roller 6 Ink roller group 7 Ink setting roller 8 Plate cylinder (upstream roller) 9 Blanket cylinder (downstream roller) 10 Impression cylinder 11 Paper 12 Watercraft 13 Water roller Reference Signs List 14 Watering roller 15 Roller constituting roller group 18 Ink consuming roller 19 Ink scraping blade (ink scraping member) 20 Load spring 21 Press key 23 Ink tray 26 Lidar roller (leveling member) 30 Ink scraping device

Claims (6)

[Claims] 1. An ink supply device for a printing press, comprising an ink fountain and a plurality of rollers, and supplying the ink of the ink fountain to a printing unit via the plurality of rollers. A pre-supply mode for supplying ink from the ink fountain with the downstream roller in contact with the upstream roller being separated from the predetermined upstream roller, and operating in the pre-supply mode to remove the ink from the ink fountain; An ink supply device comprising an ink consumption mechanism for consuming ink supplied to an upstream roller. 2. The ink supply according to claim 1, wherein said upstream roller is a plate cylinder constituting said plurality of rollers, and said downstream roller is a blanket cylinder in contact with said plate cylinder. apparatus. 3. An ink consuming mechanism comprising an ink scraping member and an ink consuming roller in contact with the plate cylinder, wherein the ink consuming member is engaged with the ink consuming roller in the preliminary supply mode. 3. The ink supply device according to claim 2, wherein: 4. An ink scraping member is provided as the ink consumption mechanism. In the preliminary supply mode, the ink scraping member is provided on an ink forming roller disposed upstream of the plate cylinder for adhering ink to the plate cylinder. The ink supply device according to claim 2, wherein the ink supply device is configured to be engaged. 5. An ink consumption mechanism comprising: an ink scraping member; and an ink consumption roller disposed upstream of the plate cylinder and in contact with an ink application roller for applying ink to the plate cylinder. 3. The ink supply device according to claim 2, wherein in the mode, the ink scraping member is engaged with the ink consumption roller. 6. A roller according to claim 3, further comprising a leveling member which is engaged with said roller with which said ink scraping member is engaged, to level ink adhered to said roller. The ink supply device according to the item.