JP7373627B2 - printing blanket - Google Patents

Description

The present invention relates to a printing blanket that prints by transferring ink transferred from a printing plate onto a printing material, and related technology.

2-piece cans and 3-piece cans are the main types of canned beverage containers filled with alcoholic beverages such as beer and chu-hi, and non-alcoholic beverages such as soft drinks. A two-piece can, for example, has a cylindrical (cup-shaped) can body with a bottom made by drawing and ironing (DI) a flat plate made of aluminum or aluminum alloy, and an opening at the top end of the can body. It consists of a can lid that is fitted. When producing canned beverages in two-piece cans, it is customary to print on the can body, fill the can body with beverage, and attach a can lid. In this specification, a can body with a bottom before being filled with a beverage is sometimes referred to as a "beverage can", and a canned beverage is sometimes referred to as a "beverage can".

Conventionally, well-known blanket printing (offset printing) using a blanket has been mainly used to print on the can body of the two-piece can.

For example, Patent Documents 1 to 3 listed below disclose printing devices for blanket printing on can bodies. This printing device is equipped with a printing plate such as letterpress or intaglio and a blanket (blanket sheet), and ink is supplied to a predetermined position on the printing plate and adheres thereto, and the ink on the printing plate is transferred to the blanket. . Furthermore, when the blanket to which the ink has been transferred comes into contact with the can barrel, the ink on the blanket is transferred to the printing material. In this way, predetermined printing patterns such as designs, characters, symbols, etc. are printed on printing materials such as can bodies.

Generally, in blanket printing, a plurality of printing plates of a plurality of types are provided depending on the type of ink used, the type of printing pattern, etc., and a plurality of blankets are also provided. Then, ink is sequentially transferred onto each blanket from a plurality of types of printing plates, so that a predetermined printing pattern is formed for each blanket.

In normal blanket printing, the entire blanket surface of the blanket is formed as a flat surface, and a printing pattern is formed by transferring various types of ink from multiple printing plates onto the flat surface in various forms. ing. On the other hand, in the blankets of printing devices shown in Patent Documents 1 to 3, a part of the blanket surface is provided with an engraved area (uneven area), and within the uneven area, a convex part (for printing Ink is transferred from the printing plate only to the convex portions, and the ink on the convex portions is transferred to the printing material.

Special table 2015-526317 publication Special Publication No. 2016-511175 Japanese Patent Application Publication No. 2015-227002

However, in the conventional printing apparatuses shown in Patent Documents 1 to 3 above, since the blanket includes an uneven area (engraved area), it is difficult to process the uneven areas with high precision in the engraving area, and it is difficult to process the unevenness in the engraving area. There was a risk that the pattern could not be printed reliably. Furthermore, if the blanket material is selected with priority given to the workability of the blanket, in some cases, ink transferability, reproducibility, etc. may deteriorate, and the desired printing pattern may not be printed reliably.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a printing blanket that can reliably print a desired printing pattern and related technology.

In order to solve the above problems, the present invention includes the following means.

[1] A printing blanket that prints a predetermined printing pattern on a printing material by transferring ink transferred from a printing plate to the printing material,
A printing blanket characterized in that at least some regions are made of a different material than other regions.

[2] The printing blanket according to item 1, wherein the part of the region includes a concavo-convex region in which concavities and convexities are formed.

[3] The printing blanket according to item 2, wherein the uneven region is formed by cutting.

[4] The printing blanket according to item 2 or 3, wherein the uneven region is formed by laser engraving.

[5] The printing blanket according to any one of items 1 to 4 above, wherein the partial area is an area where halftone dot printing is performed and is formed to have a higher hardness than the other area.

[6] The printing blanket according to any one of items 1 to 5 above, wherein the other area is an area where solid printing is performed.

[7] Comprising a printing plate and a blanket, the ink on the printing plate is transferred to the blanket, and the ink transferred to the blanket is transferred to the printing medium, so that a predetermined color is formed on the printing medium. A printing device configured to print a printing pattern of
A printing apparatus characterized in that the blanket is constituted by the printing blanket described in any one of items 1 to 6 above.

[8] The printing device according to item 7, wherein the printing object is constituted by an aluminum or aluminum alloy can body used for canned beverage containers.

[9] When printing a predetermined printing pattern on a printing material using a printing plate and a blanket, the ink on the printing plate is transferred to the blanket, and the ink transferred to the blanket is transferred to the printing material. A printing method that transfers the image onto the body,
A printing method characterized in that the printing blanket according to any one of items 1 to 6 above is used as the blanket.

According to the printing blankets of inventions [1] to [6], some areas are made of a different material from other areas depending on the circumstances of the part of the area, so that A desired printing pattern can be reliably printed on the body. For example, if some areas of the blanket include uneven areas due to laser engraving, etc., use a material with excellent engraving suitability to provide good cutting accuracy during cutting, such as laser engraving. The blanket itself can be manufactured easily and with high precision by making it of a material that has less scattering of shavings and is easy to remove shavings from. Furthermore, by constructing the other regions with the same material as the well-known blanket, it is possible to reliably print the desired printing pattern in the other regions as well.

In addition, in the printing blanket of the present invention, when halftone dot printing is performed in a part of the area, by configuring the part of the area with a material with high hardness, the occurrence of thickening can be suppressed and the printing can be performed with high reproducibility. A detailed desired print pattern can be printed. Furthermore, when performing solid printing in other areas, by configuring the other areas with a medium or low hardness material, ink transferability can be improved and the desired print pattern with sufficient ink density of the image can be printed. can do.

According to the printing apparatus of invention [7], since the printing blanket of the invention described above is used, the same effects as described above can be obtained.

According to the printing device of invention [8], since printing is performed on the can body of the canned beverage container, the desired printing pattern is printed, thereby making the canned beverage highly appealing to buyers. can be manufactured.

According to the printing method of invention [9], since the printing blanket of the invention described above is used, the same effects as described above can be obtained.

FIG. 1 is a block diagram for explaining the schematic configuration of a printing apparatus to which a printing blanket according to an embodiment of the present invention can be applied. FIG. 2 is a block diagram for explaining the blanket and printing plate of the embodiment. FIG. 3 is a plan view for explaining the material of the blanket of the embodiment. FIG. 4 is a diagram showing the state of the printing protrusions in the blanket of the embodiment during printing, in which Figure (a) is a diagram when a high-hardness material is used, and Figure (b) is a diagram when a medium-hardness material is used. Figure (c) shows the case where a material with low hardness is used. FIG. 5 is a block diagram for explaining printing pressure in the printing apparatus of the embodiment.

FIG. 1 is a block diagram for explaining the schematic configuration of a printing apparatus to which a printing blanket according to an embodiment of the present invention can be applied. The multi-pattern printing device of this embodiment uses a bottomed can body (beverage can) W made of aluminum or aluminum alloy in a two-piece can constituting a container for canned beverages (beverage cans) as a printing material. Predetermined printing patterns such as designs, characters, symbols, etc. are printed on the outer peripheral surface of the cylinder W.

As shown in FIG. 1, the printing apparatus of this embodiment includes a blanket wheel 5, a plurality of plate cylinders 6 provided along the outer periphery of the blanket wheel 5, and a can holding and moving mechanism 7 adjacent to the blanket wheel 5. We are prepared.

A printing plate 1 formed in accordance with a printing pattern such as a pattern printed on the can cylinder W is provided on the outer circumferential surface of the plate cylinder 6. In this embodiment, the printing plate 1 is made of letterpress, but may also be made of intaglio. The plate cylinder 6 is configured to be freely rotatable, and ink is supplied from an ink supply means (not shown) to the printing area on the printing plate 1 of the plate cylinder 6 and is attached thereto. The ink supply means includes, for example, a plurality of ink receivers filled with ink of each color required for each printing brand, a plurality of ink transfer rolls that supply ink from the ink receivers to the printing plate 1, and the like.

A plurality of printing blankets 2 are provided on the outer peripheral surface of the blanket wheel 5. Each blanket 2 is configured to contact the printing plate 1 of the plate cylinder 6 and also to contact the can cylinder W held by the can holding and moving mechanism 7.

The can holding and moving mechanism 7 includes a mandrel (core) 71 that is inserted into the can body W taken in by a can body taking means (not shown) and rotatably holds the can body W in a negative pressure state, and a mandrel 71 that is held by the mandrel 71. It is provided with a rotary plate 72 that rotates and sequentially moves the can bodies W that have been rotated toward the blanket wheel 5 side. Note that the can body W is washed and dried before printing. Furthermore, if necessary, a colorless or white base coating treatment (including drying treatment) is applied.

In the printing apparatus with this configuration, various types of ink are appropriately supplied and attached to the printing area of each printing plate 1 as needed via the ink supply means, and the ink attached to the plurality of printing plates 1 is The ink of the plurality of printing plates 1 is sequentially transferred to the necessary portions of each blanket 2 on the rotating blanket wheel 5, forming an inverted printing pattern. The printed pattern transferred to the blanket 2 then comes into contact with the can body W held by the mandrel 71, and the can body W rotates once relative to the blanket 2 (actually, more than once including a slight overlap). During this period, the inverted printed pattern on the blanket 2 is transferred to the outer peripheral surface of the can body W. In this way, a predetermined printing pattern formed on the portions of the plurality of printing plates 1 that require ink is printed on the can body W.

After printing, a clear paint is applied to the outer peripheral surface of the printed can body W, and after the ground contact portion of the bottom wall of the can body W is coated, a baking treatment is performed.

FIG. 2 is a block diagram for explaining the printing plate 1 and blanket 2 applied to the printing apparatus of this embodiment. As shown in the figure, the printed can body (printed can) W has a design (design pattern) 4 composed of circles, squares, etc., and the letter "A" (character pattern). ) 45 and the letter "B" 46. The pattern 4 is composed of a filled circular pattern inner part 4a and a square annular pattern outer part 4b arranged so as to surround the outer periphery of the pattern inner part 4a.

As will be described later, the inner side 4a of the figure 4 and the outer side 4b of the figure 4 are printed in different colors. Furthermore, although the letter "A" 45 and the letter "B" 46 are printed in different colors, each letter itself is printed in a single color. Further, in the figure, a part of the right side of the letter "B" on the printing can W is a blind spot.

FIG. 3 is a plan view for explaining the material of the blanket 2. As shown in FIG. As shown in FIGS. 2 and 3(a), the blanket 2 has a partial region (one region) 21 constituted by the left half region shown by hatching with a narrow pitch in FIG. 3, and a hatching with a wide pitch. and another area (other area) 25 constituted by the right half area shown in FIG. As will be described in detail later, one region 21 is made of a different material from the other region 25.

The blanket 2 is generally constructed of a laminate including a rubber layer as an upper surface layer and a plurality of base layers. In this embodiment, when it is said that the materials are different, it also includes the case where at least some of the materials are different. For example, even if the material (component) of the rubber layer in one region 21 is different from the material of the rubber layer in the other region 25, and the materials of the other layers are the same, both regions 21 and 25 are made of different materials.

The other area 25 of the blanket 2 corresponds to the area containing the letters "A" and "B" 45 and 46 of the printing can W, and the other area 25 includes the letters "A" and "B" from the printing plate 1. The shape of the ink "B" transferred to the other area 25 is originally a shape in which the left and right sides are reversed, but in this embodiment, the ink is transferred in the form of . In order to facilitate understanding of the invention, the shape of "B" is shown in its normal shape without being reversed. Needless to say, the shape of "A" of the ink transferred to the other area 25 is a line-symmetrical shape and is arranged along the can axis direction, so the shape remains as it is as shown in FIG. 2.

One area 21 of the blanket 2 corresponds to the area containing the pattern 4 of the printing can W, and within this one area 25, an engraving area 3 as an uneven area for printing the pattern 4 is provided. . In the engraving area 3, printing protrusions 3a and 3b are provided so as to match the shape of the pattern 4.

The printing protrusions 3a, 3b are formed into a convex shape by cutting (grooving) a region other than the printing protrusions 3a, 3b within the engraving area 3 by laser engraving. In other words, the printing protrusions 3a and 3b are portions of the engraving area 3 that remain as unengraved portions that are not subjected to cutting. Therefore, the tip surfaces (upper end surfaces) of the printing convex portions 3a and 3b are flat portions (blanket surfaces), and serve as portions to which ink is transferred. Note that the area other than the engraving area 3 in one area 21 of the blanket 2 is a flat part (blanket surface), and the entire area of the other area 25 described above is also a flat part (blanket surface).

The printing protrusions 3a and 3b have a shape corresponding to the pattern 4, with a circular protrusion inner part 3a corresponding to the pattern inner part 4a, and a circular protrusion inner part 3a corresponding to the pattern outer part 4b and the outer periphery of the protrusion inner part 3a. It is constituted by a square annular convex outer part 3b arranged so as to surround the outer part 3b.

The printing plate 1 includes two types of printing plates 11 and 12, a first and a second printing plate. In this embodiment, when the printing plates including the first and second printing plates 11 and 12 are collectively referred to as the printing plate 1.

In this embodiment, the printing plates 11 and 12 are constituted by letterpress plates having convex portions to which ink is attached. The first printing plate 11 is provided with an "A"-shaped letter ink adhesion part 15 corresponding to the letter "A" 45 on the can body W, and also corresponding to the inner convex part 3a of the blanket 3. A pattern inner ink adhering portion 1a is provided. The second printing plate 12 is provided with a letter ink adhesion part 16 in the shape of "B" corresponding to the letter "B" 46 on the can body W, and also corresponding to the outer convex part 3b of the blanket 3. A pattern outer ink adhering portion 1b is provided.

Here, in this embodiment, the pattern inner side ink adhesion part 1a is formed in a shape that can contact the inner side part 3a of the convex part 3a and transfer the ink without contacting the outer part 3b of the convex part of the blanket 2, and The pattern outer ink adhesion portion 1b is formed in a shape that can contact the outer protrusion portion 3b of the blanket 2 to transfer ink without contacting the inner protrusion portion 3a of the blanket 2.

Specifically, the inner side of the pattern ink adhesion portion 1a is formed in a circular shape corresponding to the center of the engraving area 3 of the blanket 2, and the outer side of the pattern ink adhesion portion 1b covers the inner side of the pattern ink adhesion portion 1a. It is shaped like a square with a central hole that looks like it has been removed. In other words, the shape of the inner side of the pattern ink adhering portion 1a and the shape of the outer side of the pattern ink adhesion portion 1b have a complementary relationship.

In this embodiment, inks of different colors are supplied to the first printing plate 11 and the second printing plate 12 from the ink supply means (not shown). In other words, in the first printing plate 11, the same color ink is supplied to the pattern inner ink adhesion part 1a and the letter ink adhesion part 15 shaped like "A", and in the second printing plate 12, the pattern outer ink adhesion part 1a is supplied with ink of the same color. Ink of the same color is supplied to the adhering portion 1b and the “B”-shaped character ink adhering portion 16. Further, the ink supplied to the inner side ink adhesion portion 1a of the first printing plate 11 and the ink supplied to the outer ink adhesion portion 1b of the second printing plate 12 are set to different colors.

The printing apparatus of this embodiment includes the printing plates 11 and 12 and the blanket 2 having the above-mentioned configuration, and print processing is performed on the can body W as described below.

First, ink is supplied from an ink supply means (not shown) to the ink adhesion parts 1a and 15 of the first printing plate 11 and adheres thereto, and at the same time, ink is applied to the ink adhesion parts 1b and 16 of the second printing plate 12 by an ink supply means (not shown). ) is supplied with ink of a different color from the above-mentioned ink and adheres to the ink.

Subsequently, the ink adhering to the first and second printing plates 11 and 12 is sequentially transferred to the printing convex portions 3a and 3b and other areas 25 of the blanket 2. Thereafter, the blanket 2 to which the ink has been transferred comes into contact with the can body W, so that the ink of the blanket 2 is transferred to the outer peripheral surface of the can body W, and the pattern 4 and letters 45 and 46 are printed, and the printed can W is Manufactured.

As described above, in this embodiment, the one area 21 on the left side of the blanket 2 and the other area 25 on the right side are made of different materials. In this embodiment, a material suitable for each region 21, 25 may be selected as appropriate. For example, in the present embodiment, an engraving area 3 that is unevenly formed by laser engraving is provided in one area 21 on the left side of the blanket 2, so a material suitable for cutting (engraving) may be used. Therefore, one area 21 in the blanket 2 of this embodiment is made of a material that is easy to process during engraving, a material that does not easily generate shavings, and a material that allows the generated shavings to be easily removed by cleaning or the like. That's what I do. Further, the other region 25 may be made of, for example, a material that constitutes a general blanket.

On the other hand, ink transfer methods mainly include halftone printing and solid printing. Halftone printing allows for continuous changes in color tone, etc., and is suitable for printing designs, etc., and solid printing has a sufficient amount of ink (ink film thickness) and is suitable for printing characters, symbols, etc. For this reason, in this embodiment, since the engraving area 3 of one area 21 is for printing the pattern 4, halftone printing is adopted. Further, since the other areas 25 are for printing characters 45 and 46, solid printing is used.

In this embodiment, as will be explained below, one area 21 in which halftone printing is applied is made of a highly hard material. In this embodiment, the hardness of the blanket 2 (one region 21 and the other region 25) is not the hardness of the upper surface layer (rubber layer) of the blanket 2 alone, but the hardness of the entire blanket.

FIG. 4 is a diagram showing the state of printing convex portions 3a and 3b in the blanket 2 of the embodiment during printing, and FIG. 4(a) is a diagram when a high hardness material is used, and FIG. 4(b) (c) is a diagram when a material with medium hardness is used, and (c) is a diagram when a material with low hardness is used. In each figure (a) to (c), the left side is a schematic sectional view of the printing convex parts 3a, 3b, and the right side is a schematic plan view showing the apexes of the printing convex parts 3a, 3b as circles. The schematic plan view corresponds to the contact area with the can body W in the printing convex portions 3a and 3b.

As shown in FIG. 4(a), when a high hardness material is used in one area 21 of the blanket 2, even if printing pressure is applied during printing, the printing protrusions 3a and 3b hardly deform, and the can The contact area with the trunk W remains almost unchanged.

The printing pressure here corresponds to the contact pressure between the blanket 2 and the can body W during ink transfer, as shown in FIG. Therefore, even if the printing pressure is the same, when the material of the blanket 2 is soft (low hardness), the amount of penetration by the can body W of the blanket 2 P is greater than when the material is hard (high hardness). becomes larger.

As shown in FIG. 4(b), when a medium-hardness material is used for one region 21 of the blanket 2, when printing pressure is applied, the printing convex portions 3a and 3b are compressively deformed (concave deformation) and the can body The contact area with W increases. Furthermore, as shown in FIG. 2(c), when a low-altitude material is used in one area 21 of the blanket 2, when printing pressure is applied, the printing convex portions 3a and 3b are greatly compressed and deformed (concave deformation). The contact area with the barrel W also increases significantly.

On the other hand, in halftone printing, when the ink is transferred from the blanket 2 to the printing medium (can cylinder W), if the contact area changes greatly as shown in FIGS. 4(b) and 4(c), the transferred ink The area of the dot becomes large, and thickening (dot gain) occurs. If this happens, the color tone of the actually printed pattern 4 will be much different from the theoretical design value, resulting in a problem of reduced reproducibility. In the present invention, reproducibility corresponds to the area ratio between the theoretical design value and the halftone dots of the printed pattern 4, and the area of the halftone dots of the printed pattern 4 approaches the theoretical design value. reproducibility becomes higher. Therefore, when the reproducibility is the highest, the theoretical design value and the halftone dots of the printed pattern 4 have the same area.

In this embodiment, as described above, one area 21 of the blanket 2, which is an area in which a pattern or the like is printed by halftone dot printing, is made of a highly hard material that does not easily become thick. Since a high-hardness material is used in the area 21 where halftone dot printing is performed in this way, it is possible to print a desired ideal pattern 4 or the like with good reproducibility.

Note that when transferring the ink from the printing plate 1 to the blanket 2, if the hardness of the blanket 2 is low, thickening will occur as described above when plate pressure is applied. It is preferable to use a highly hard material that does not easily become thick for the area (one area 21) to be printed.

However, if the hardness of the blanket 2 (one area 21) is too high, specifically, if the hardness is equal to or higher than that of the printing plate 1, there is a risk that the printing plate 1 will be damaged due to the plate pressure. The hardness of (one area 21) is preferably lower than the hardness of the printing plate 1.

Here, the plate pressure corresponds to the contact pressure between the printing plate 1 and the blanket 2 when ink on the printing plate 1 is transferred to the blanket 2.

For reference, in this embodiment, the medium hardness corresponds to the hardness of commonly used blankets, and this medium hardness is 81° as measured by a dirometer A. Therefore, in this embodiment, if the hardness exceeds 81°, it is high hardness, and if it is less than 81°, it is low hardness. Furthermore, the hardness of the printing plate 1 is generally 96° to 97° as measured by a dirometer A. Therefore, in this embodiment, it is preferable that the hardness of the blanket 2 is set lower than the hardness of the printing plate 1, which is "96°". Further, the overall thickness of a typical blanket is 1.95 mm to 2.00 mm, of which the thickness of the rubber layer (top layer) is 0.26 mm to 0.30 mm.

Further, in this embodiment, as will be explained below, the other area 25 in which solid printing is applied is made of a medium hardness or low hardness material.

In other words, the solidly painted parts (characters 15 and 16) in the other area 25 of the blanket 2 are caused by the ink being stretched when printing pressure is applied, as shown in FIGS. 4(b) and 4(c). Since the contact area between the printing medium and the printing medium (plate cylinder W) becomes larger, the amount of ink transferred increases and the ink transferability improves. Therefore, by using a material with medium hardness, more preferably low hardness, for the other area 25 where solid printing is performed, the transferability is improved and the characters 15, which have sufficient ink density for an image with good ink collapse (no uneven transfer), A desired printing pattern such as 16 can be printed.

In the case of halftone dot printing, the area to which the ink is transferred is small, so the adverse effect of the ink transferability is small, but the adverse effect of the thickening is large. Therefore, as mentioned above, it is preferable that the blanket area where halftone dot printing is performed be made of a material with high hardness.

In addition, when transferring the ink from the printing plate 1 to the blanket 2, if the hardness of the blanket 2 is made low, the contact area between the printing plate 1 and the blanket 2 will be large as described above when plate pressure is applied. Therefore, from this point of view as well, it is preferable to use a material of medium hardness or low hardness with good ink transferability for the area (other area 25) of the blanket 2 where solid printing is performed.

By the way, in the printing apparatus of this embodiment, by adopting the following conditions (1) to (4), it is possible to increase the amount of ink transfer (improve ink transferability).
(1) Increase plate pressure.
(2) Increase the printing pressure.
(3) Decrease the hardness of the blanket.
(4) Decrease the viscosity (tack value) of the ink.

In this embodiment, when selecting the material of the blanket 2, it is sufficient that the transferability of the ink is necessary and sufficient, and the importance is not placed on it, that is, the above conditions (1) to (4) are not placed on the importance so much. In addition, it is better to place importance on the manufacturability of the blanket 2. For example, as described above, when selecting a material for processing the required area (engraved area 3) by laser engraving or the like, it is preferable to place emphasis on engraving suitability and cleanability.

Note that the plate pressure and printing pressure in conditions (1) and (2) are determined by the machine precision and setting conditions of the printing device, and the viscosity (tack value) of the ink is closely related to the color tone, so it is easy to It is difficult to change to . The tack value here refers to the viscosity of printing ink, and the larger the tack value, the less transfer.

As described above, according to the printing blanket 2 of the present embodiment, some regions are made of a different material from other regions depending on the circumstances of the region, so that the can body W etc. is covered. A desired ideal printing pattern can be printed on the printed material. Specifically, since one area 21 of the blanket 2 where halftone dot printing is performed is made of a highly hard material, the occurrence of thickening is suppressed and the reproduction is equal to the theoretical design value (halftone setting value). It is possible to print a desired print pattern such as a high-definition pattern 4 with high quality. Furthermore, since the other area 25 for solid printing is made of medium or low hardness material, it is possible to improve the ink transferability, and the ink density of the image with good ink collapse (no uneven transfer) is sufficient for characters. A desired printing pattern such as 45, 46, etc. can be printed.

Furthermore, one area 21 of the blanket 2 that includes the engraving area 3 is made suitable for engraving, such as obtaining good cutting accuracy, less scattering of shavings, and easy removal of shavings during laser engraving processing. Since it is made of superior material, the blanket 2 with high precision can be manufactured easily and efficiently.

In the above embodiment, as shown in FIG. 3(a), the left half of the blanket 2 is defined as one region (part of the region) 21, and the right half is defined as the other region (other region) 25, but the present invention is not limited thereto. Rather, in the present invention, the position of one area within the blanket may be determined in accordance with appropriate conditions such as printing specifications, and in short, it is sufficient that one area 21 is set in at least a portion of the blanket. For example, as shown in FIG. 3(b), the right half of the blanket 2 may be set in one area 21, or the upper or lower half of the blanket 2 may be set in one area 21 as shown in FIGS. 3(c) and 3(d). As shown in Figures (e) and (f), the blanket 2 can be divided into three parts in the left and right direction (in the circumferential direction of the can), and the center or both sides can be set as one area 21. It may be divided into three parts (in the axial direction), and the center or both sides may be set as one region 21. Further, in the present invention, the size and shape of one region are not limited, and the number of one region is not limited either.

Further, in the above embodiment, the blanket 2 is made of two types of materials in one area and the other area, but the present invention is not limited to this, and the blanket is made of three or more types of materials. It may be configured by

Further, in the above embodiment, the case where printing is performed in two colors has been described as an example, but the types of colors are not limited to two colors, and in the present invention, printing may be performed in three or more colors. For example, a printing device that can supply eight colors of ink can print in eight colors. In other words, the number of colors in the print pattern can be changed depending on the ink supply capacity of the printing device.

Further, the type of blanket attached to the printing device is not limited to one type, and two or more types of blankets may be attached to the printing device. For example, in a printing device where 12 blankets are attached, 12 types of blankets can be used.

Further, in the above embodiment, the case where printing is performed on a can body (beverage can) has been described as an example, but the present invention is not limited to this. It can also be applied to printing on printed matter.

The printing blanket of the present invention can be applied, for example, to a printing device for printing on canned beverage containers filled with alcoholic beverages or non-alcoholic beverages.

1, 11, 12: Printing plate 2: Blanket (printing blanket)
21: One area (partial area)
25: Other areas (other areas)
3: Engraving area (uneven area)
3a, 3b: Printing convex W: Can body (printed material)

Claims (6)

A printing blanket that prints a predetermined printing pattern on a printing medium by transferring ink transferred from a printing plate to the printing medium,
at least some areas are made of a different material than other areas,
The partial area includes an uneven area in which unevenness is formed for forming a printing pattern,
The some regions are formed to have higher hardness than the other regions ,
A printing blanket characterized in that an upper end surface of the convex portion to which ink is transferred in the partial region and a blanket surface to which ink is transferred in the other region are formed at the same height. The printing blanket according to claim 1, wherein the other area is an area where solid printing is performed. A printing blanket that prints a predetermined printing pattern on a printing medium by transferring ink transferred from a printing plate to the printing medium,
at least some areas are made of a different material than other areas,
The partial area includes an uneven area in which unevenness is formed for forming a printing pattern,
The other area is an area where solid printing is performed ,
A printing blanket characterized in that an upper end surface of the convex portion to which ink is transferred in the partial region and a blanket surface to which ink is transferred in the other region are formed at the same height. It includes a printing plate and a blanket, and the ink on the printing plate is transferred to the blanket, and the ink transferred to the blanket is transferred to the printing material, thereby creating a predetermined printing pattern on the printing material. A printing device configured to print
A printing apparatus characterized in that the blanket is constituted by the printing blanket according to any one of claims 1 to 3. 5. The printing apparatus according to claim 4, wherein the printing object is constituted by a can body made of aluminum or aluminum alloy used for containers of canned beverages. When printing a predetermined printing pattern on a printing material using a printing plate and a blanket, the ink on the printing plate is transferred to the blanket, and the ink transferred to the blanket is transferred to the printing material. A printing method configured to
A printing method characterized in that the printing blanket according to any one of claims 1 to 3 is used as the blanket.

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