JP2021011113A - Printing blanket - Google Patents

Abstract

To provide a printing blanket capable of printing a desired printing pattern.SOLUTION: There is provided a printing blanket 2 which is an object in which ink transferred from a printing plate 1 is transferred to a printing object W, to thereby print a prescribed printing pattern on the printing object W. In the printing blanket 2, at least a part of region 21 is constituted of a material different from other region 25.SELECTED DRAWING: Figure 2

Description

The present invention relates to a printing blanket in which an ink transferred from a printing plate is transferred to a printing object for printing, and a related technique thereof.

Two-piece cans and three-piece cans are the mainstream containers for alcoholic beverages such as beer and chu-hi, and canned beverages filled with non-alcoholic beverages such as soft drinks. Two-piece cans are, for example, a bottomed tubular (cup-shaped) bottomed can body made by drawing and ironing (DI) molding a flat plate made of aluminum or aluminum alloy, and the upper end opening of the can body. It is composed of a can lid to be fitted. When producing a canned beverage in a two-piece can, it is customary to print the can body, fill the can body with the beverage, and attach a can lid. In the present specification, a can body with a bottom before filling a beverage may be referred to as a "beverage can", and a canned beverage may be referred to as a "beverage can".

Conventionally, when printing on the can body of the above-mentioned two-piece can, a well-known blanket printing (offset printing) using a blanket is mainly adopted.

For example, Patent Documents 1 to 3 below disclose a printing apparatus for blanket printing on a can body. This printing apparatus includes a printing plate such as a letterpress or intaglio plate and a blanket (blanket sheet), and ink is supplied and adheres to a predetermined position of the printing plate, and the ink on the printing plate is transferred to the blanket. .. Further, when the blanket to which the ink is transferred comes into contact with the can body, the ink on the blanket is transferred to the object to be printed. In this way, a printing pattern such as a predetermined pattern, character, or symbol is printed on a printed object such as a can body.

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

In normal blanket printing, the entire blanket surface of the blanket is formed on a flat surface, and various types of ink are transferred from a plurality of printing plates to the flat surface in various forms to form a printing pattern. ing. On the other hand, the blanket of the printing apparatus shown in Patent Documents 1 to 3 is provided with an engraved region (concave and convex region) engraved on a part of the blanket surface, and the convex portion (for printing) is provided in the concavo-convex region. The ink is transferred from the printing plate only to the convex portion), and the ink on the convex portion is transferred to the object to be printed.

Special Table 2015-526317 Special Table 2016-511175 JP-A-2015-227002

However, in the conventional printing apparatus shown in Patent Documents 1 to 3, since the blanket includes a concavo-convex region (engraving region), it is difficult to process the concavo-convex region in the engraving region with high accuracy, and desired printing is performed. There was a risk that the pattern could not be printed reliably. Further, if the material of the blanket is selected with priority given to the workability with respect to the blanket, the transferability and reproducibility of the ink may be deteriorated, and the desired print 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 capable of reliably printing a desired printing pattern and related techniques thereof.

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

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

[2] The printing blanket according to item 1 above, wherein the partial area includes an uneven area on which unevenness is formed.

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

[4] The printing blanket according to item 2 or 3 above, 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 a area for halftone dot printing and is formed to have a higher hardness than the other areas.

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

[7] A printing plate and a blanket are provided, and the ink on the printing plate is transferred to the blanket, and the ink transferred to the blanket is transferred to the object to be printed. It is a printing device that prints the printing pattern of
A printing apparatus, wherein the blanket is composed of the printing blanket according to any one of the above items 1 to 6.

[8] The printing apparatus according to item 7, wherein the printed object is made of an aluminum or aluminum alloy can body used for a container for a canned beverage.

[9] When printing a predetermined print pattern on a printing object 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 printed. It is a printing method that is transferred to 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 the inventions [1] to [6], a part of the area is made of a different material from the other area according to the circumstances of the part of the area, so that the area to be printed is printed. A desired print pattern can be reliably printed on the body. For example, when a part of the blanket contains an uneven area due to laser engraving or the like, a material having excellent engraving suitability for the part of the area, for example, good cutting accuracy can be obtained during cutting such as laser engraving. The blanket itself can be manufactured easily and accurately by using a material that scatters less shavings and that can easily remove shavings. Further, by forming the other area with the same material as the well-known blanket, the desired printing pattern can be reliably printed in the other area as in the conventional case.

Further, in the printing blanket of the present invention, when halftone dot printing is performed in a part of the area, by forming the part of the area with a material having a high hardness, the occurrence of thickening can be suppressed and the reproducibility is high. It is possible to print a desired fine print pattern. When solid printing is performed in another area, the transferability of the ink can be improved by forming the other area with a material having medium hardness or low hardness, and a desired printing pattern having a sufficient ink density in the image is printed. can do.

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

According to the printing apparatus of the invention [8], since printing is performed on the can body of the container of the canned beverage, the canned beverage having a high appeal to the purchaser can be produced by printing a desired printing pattern. Can be manufactured.

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

FIG. 1 is a block diagram for explaining a 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 the 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 a state at the time of printing of a convex portion for printing in the blanket of the embodiment, FIG. 4A is a diagram when a high hardness material is used, and FIG. 4B is a diagram showing a medium hardness material. The figure when used and the figure (c) are the figure when the material of 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 a schematic configuration of a printing apparatus to which a printing blanket according to an embodiment of the present invention can be applied. In the multi-pattern printing apparatus of the present embodiment, a can body (beverage can) W made of aluminum or an aluminum alloy in a two-piece can constituting a container for a canned beverage (beverage can) is used as an object to be printed. A predetermined printing pattern such as a pattern, a character, a symbol, etc. is printed on the outer peripheral surface of the body W.

As shown in FIG. 1, the printing apparatus of the present embodiment includes a blanket wheel 5, a plurality of plate cylinders 6 provided along the outer circumference of the blanket wheel 5, and a can holding and moving mechanism 7 adjacent to the blanket wheel 5. I have.

On the outer peripheral surface of the plate cylinder 6, a printing plate 1 formed according to a printing pattern such as a pattern printed on the can cylinder W is provided. In the present embodiment, the printing plate 1 is formed of a letterpress plate, but may be formed of an intaglio plate. The plate cylinder 6 is rotatably configured, and ink is supplied from an ink supply means (not shown) to an image portion on the printing plate 1 of the plate cylinder 6 to adhere to the plate cylinder 6. The ink supply means is composed of, for example, a plurality of ink receivers filled with inks of each color required for each printing brand, a plurality of ink transfer rolls for supplying ink from the ink receivers to the printing plate 1, and the like.

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

The can holding / moving mechanism 7 is held by a mandrel (core) 71, which is inserted into a can body W taken in by a can body taking-in means (not shown) and rotatably holds the can body W in a negative pressure state, and a mandrel 71. It is provided with a rotating plate 72 for sequentially rotating the can body W to the blanket wheel 5 side. The can body W is washed and dried before printing. Further, if necessary, a colorless or white undercoating treatment (including a drying treatment) is applied.

In the printing apparatus having this configuration, various inks are appropriately supplied and adhered to the image area of each printing plate 1 via the ink supply means, and the inks adhering to the plurality of printing plates 1 are attached. The inks of the plurality of printing plates 1 are sequentially transferred to the required portions on each blanket 2 on the rotating blanket wheel 5, and a reverse-shaped printing pattern is formed. Then, the print pattern transferred to the blanket 2 comes into contact with the can body W held by the mandrel 71, and the can body W makes one rotation with respect to the blanket 2 (actually, one or more rotations by adding a slight overlap portion). In the meantime, the inverted print 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 portion where the ink of the plurality of printing plates 1 is required is printed on the can body W.

The printed can body W is subjected to a baking process after a clear paint is applied to the outer peripheral surface of the can body W and the ground contact portion of the bottom wall of the can body W is further coated.

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

As will be described later, the design inner portion 4a and the symbol outer portion 4b of the symbol 4 are printed in different colors. Further, the letter 45 of "A" and the letter 46 of "B" are printed in different colors, but each letter itself is printed in a single color. Further, in the figure, a part of the right side of the letter "B" of 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 FIGS. 2 and 3 (a), the blanket 2 has a partial region (one region) 21 composed of the left half region shown by the hatching having a narrow pitch in FIG. 3 and the hatching having a wide pitch. It includes another region (other region) 25 composed of the region on the right half shown. 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 composed of a laminated body including a rubber layer (rubber layer) as an upper surface layer and a plurality of base layers. In the present embodiment, the case where the materials are different includes the case where at least a part of the materials are different. For example, even if the material (component) of the rubber layer in one region 21 and the material of the rubber layer in the other region 25 are different and the materials of the other layers are the same, both regions 21 and 25 are different materials.

The other area 25 of the blanket 2 corresponds to the area including the letters 45 and 46 of the letters "A" and "B" of the printing can W, and the other areas 25 correspond to the letters "A" and "B" from the printing plate 1. The shape of the ink "B" transferred to the other region 25 is originally a shape in which the left and right sides are reversed, but in the present embodiment, the ink is transferred in the form of. Is shown as a normal shape in which the shape of "B" is not inverted in order to facilitate the understanding of the invention. Needless to say, the shape of the ink "A" transferred to the other region 25 is a line-symmetrical shape and is arranged along the can axis direction, so that the shape is the same as shown in FIG.

One area 21 of the blanket 2 corresponds to an area including the design 4 of the printing can W, and an engraving area 3 as an uneven area for printing the design 4 is provided in the one area 25. .. The engraving area 3 is provided with convex printing portions 3a and 3b so as to match the shape of the design 4.

The printing convex portions 3a and 3b are formed in a convex shape by cutting (grooving) the regions other than the printing convex portions 3a and 3b in the engraving region 3 by laser engraving. That is, the convex portions 3a and 3b for printing are the portions of the engraving region 3 that are residually formed as unengraved portions that are not cut. Therefore, the tip surface (upper end surface) of the printing convex portions 3a and 3b is a flat portion (blanket surface) and is a portion to which the ink is transferred. The region other than the engraving region 3 in one region 21 of the blanket 2 is a flat portion (blanket surface), and the entire area of the other region 25 described above is also a flat portion (blanket surface).

The convex portions 3a and 3b for printing have a shape corresponding to the symbol 4, and correspond to the circular convex inner portion 3a corresponding to the symbol inner portion 4a and the outer peripheral portion 3a of the convex portion inner portion 3a. It is composed of a square annular convex outer portion 3b arranged so as to surround the above.

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

In the present embodiment, the printing plates 11 and 12 are composed of letterpress plates in which the portions to which the ink adheres are formed in a convex shape. The first printing plate 11 is provided with the character ink adhering portion 15 having the shape of "A" corresponding to the character 45 of "A" of the can body W, and corresponds to the convex portion inner portion 3a of the blanket 3. Therefore, the ink adhering portion 1a inside the design is provided. The second printing plate 12 is provided with an ink adhering portion 16 for letters having a shape of "B" corresponding to the letter 46 of "B" of the can body W, and corresponds to a convex outer portion 3b of the blanket 3. Therefore, the ink adhering portion 1b on the outside of the pattern is provided.

Here, in the present embodiment, the pattern inner ink adhering portion 1a is formed in a shape that allows ink to be transferred by contacting the convex inner side 3a without contacting the convex outer side 3b of the blanket 2. The pattern outer side ink adhering portion 1b is formed in a shape that allows ink to be transferred by contacting the convex portion outer side portion 3b without contacting the convex portion inner portion 3a of the blanket 2.

Specifically, the design inner ink adhering portion 1a is formed in a circular shape corresponding to the central portion of the engraving region 3 of the blanket 2, and the symbol outer ink adhering portion 1b forms a portion of the symbol inner ink adhering portion 1a. It is formed in a square shape with a central hole as if it had been removed. In other words, the shape of the ink adhering portion 1a on the inner side of the design and the shape of the ink adhering portion 1b on the outer side of the design 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). That is, in the first printing plate 11, ink of the same color is supplied to the pattern inner ink adhering portion 1a and the character ink adhering portion 15 having the shape of "A", and in the second printing plate 12, the symbol outer ink is supplied. Ink of the same color is supplied to the adhesion portion 1b and the character ink adhesion portion 16 having the shape of "B". Further, the ink supplied to the design inner ink adhering portion 1a of the first printing plate 11 and the ink supplied to the symbol outer ink adhering 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 configuration, and the can body W is subjected to the printing process as described below.

First, ink is supplied and adheres to the ink adhesion portions 1a and 15 of the first printing plate 11 from the ink supply means (not shown), and the ink supply means (not shown) is attached to the ink adhesion portions 1b and 16 of the second printing plate 12. ) Supply an ink of a color different from the above ink and adheres.

Subsequently, the ink adhering to the first and second printing plates 11 and 12 is sequentially transferred to the printing protrusions 3a and 3b of the blanket 2 and the other region 25. After that, when the blanket 2 to which the ink is transferred comes into contact with the can body W, the ink of the blanket 2 is transferred to the outer peripheral surface of the can body W, and the design 4 and the characters 45 and 46 are printed to print the printing can W. Manufactured.

As described above, in the present embodiment, the material of the blanket 2 is different between the left side region 21 and the right side other region 25. In the present embodiment, a material suitable for each of the areas 21 and 25 may be appropriately selected. For example, in the present embodiment, since the engraving region 3 formed by the laser engraving process is provided in the left side area 21 of the blanket 2, the material may be a material suitable for cutting (engraving). Therefore, one region 21 of the blanket 2 of the present embodiment is composed of a material that is easy to process during engraving, a material that does not easily generate shavings, and a material that can easily remove the generated shavings by cleaning or the like. I am doing it. Further, the other region 25 may be formed of, for example, a material constituting a general blanket.

On the other hand, there are mainly halftone dot printing and solid printing as ink transfer methods. Halftone dot printing is suitable for printing patterns, etc. because it can continuously change the color tone and the like, and is suitable for solid printing. Has a sufficient amount of ink (ink film thickness) and is suitable for printing characters, symbols, and the like. Therefore, in the present embodiment, since the engraving area 3 of one area 21 prints the pattern 4, halftone dot printing is adopted. Further, since the other area 25 prints characters 45 and 46, solid printing is adopted.

In this embodiment, as described below, one region 21 that employs halftone dot printing is made of a high-hardness material. Here, in the present 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 a printing state of the printing convex portions 3a and 3b in the blanket 2 of the embodiment, and FIG. 4A is a diagram when a high hardness material is used, and FIG. 4B is a diagram. Is a diagram when a material having a medium hardness is used, and FIG. 3C is a diagram when a material having a low hardness is used. In each of the drawings (a) to (c), the left side is a schematic cross-sectional view of the printing convex portions 3a and 3b, and the right side is a schematic plan view showing the vertices of the printing convex portions 3a and 3b in a circle. The schematic plan view corresponds to the contact area of the convex portions 3a and 3b for printing with the can body W.

As shown in FIG. 4A, when a high-hardness material is used for one area 21 of the blanket 2, the convex portions 3a and 3b for printing are hardly deformed even when printing pressure is applied during printing, and the can The contact area with the body W is almost the same.

Here, the printing pressure 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 (when the hardness is low), the amount of bite P by the can body W of the blanket 2 is higher than when the material is hard (when the hardness is high). Becomes larger.

As shown in FIG. 4B, when a medium-hard material is used for one area 21 of the blanket 2, when printing pressure is applied, the convex portions 3a and 3b for printing are compressed and deformed (dented and deformed) while the can body is deformed. The contact area with W increases. Further, as shown in FIG. 3C, when a low-altitude material is used for one region 21 of the blanket 2, when printing pressure is applied, the convex portions 3a and 3b for printing are greatly compressed and deformed (dented deformation), and the can The contact area with the body W is also greatly increased.

On the other hand, in halftone dot printing, when ink is transferred from the blanket 2 to the object to be printed (can body W), if the contact area changes significantly as shown in FIGS. 4 (b) and 4 (c), the ink is transferred. The area of the ink is also large, and thickening (dot gain) occurs. Then, the color tone of the actually printed pattern 4 is significantly different from the theoretical design value, and there is a problem that the reproducibility is lowered. In the present invention, the reproducibility corresponds to the area ratio of the theoretical design value and the halftone dots of the printed symbol 4, and the area of the halftone dots of the printed symbol 4 approaches the theoretical design value. The higher the reproducibility. 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 the present embodiment, as described above, a high-hardness material that does not easily cause thickening is used for one area 21 as an area for printing a pattern or the like in the blanket 2 by halftone dot printing. Since a high-hardness material is used for one area 21 where halftone dot printing is performed in this way, it is possible to print a desired ideal print pattern such as a pattern 4 with good reproducibility.

Even when the ink of the printing plate 1 is transferred to the blanket 2, if the hardness of the blanket 2 is low, thickening occurs in the same manner as described above when the plate pressure is applied. Therefore, from this point as well, the halftone dots of the blanket 2 are formed. For the area to be printed (one area 21), it is preferable to use a material having a high hardness that does not easily cause thickening.

However, if the hardness of the blanket 2 (one area 21) is too high, specifically, if the hardness is equal to or greater than the hardness of the printing plate 1, the printing plate 1 may be damaged by the plate pressure. The hardness of (1 region 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 the ink of the printing plate 1 is transferred to the blanket 2.

For reference, the medium hardness in the present embodiment corresponds to the hardness of a commonly used blanket, and the medium hardness is 81 ° as measured by the dilometer A. Therefore, in the present embodiment, when the hardness exceeds 81 °, the hardness is high, and when the hardness is less than 81 °, the hardness is low. Further, the hardness of the printing plate 1 is generally 96 ° to 97 ° as measured by the dilometer A. Therefore, in the present embodiment, it is preferable to set the hardness of the blanket 2 to be lower than the hardness "96 °" of the printing plate 1. The total thickness of a general blanket is 1.95 mm to 2.00 mm, and the thickness of the rubber layer (upper surface layer) is 0.26 mm to 0.30 mm.

Further, in the present embodiment, as described below, the other region 25 that employs solid printing is made of a material having medium hardness or low altitude.

That is, as shown in FIGS. 4 (b) and 4 (c), the solid-painted portion (the portion of characters 15 and 16) in the other area 25 of the blanket 2 is stretched by the ink when the printing pressure is applied, so that the blanket 2 Since the contact area between the ink and the printing material (plate cylinder W) is large, the amount of ink transfer is large and the ink transfer property is improved. Therefore, by using a material having a medium hardness, more preferably a low hardness, for the other region 25 for solid printing, the transferability is improved, and the ink density of the image with good ink crushing (no uneven transfer) is sufficient. A desired print pattern such as 16 can be printed.

Here, in the case of halftone dot printing, since the area where the ink is transferred is small, the adverse effect due to the transferability of the ink is small, but the adverse effect due to the thickening is large. Therefore, as described above, the blanket region for halftone dot printing is preferably made of a material having high hardness.

Even when the ink of the printing plate 1 is transferred to the blanket 2, if the hardness of the blanket 2 is lowered, the contact area between the printing plate 1 and the blanket 2 becomes large as described above when the plate pressure is applied. From this point of view as well, it is preferable to use a medium-hardness or low-hardness material having good ink transferability for the region (other region 25) where solid printing of the blanket 2 is performed because the amount of transfer of the ink is large.

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

In the present embodiment, when selecting the material of the blanket 2, the transferability of the ink is not so important as long as it is necessary and sufficient, that is, the above conditions (1) to (4) are not so important. In addition, it is good to emphasize the manufacturability of the blanket 2. For example, as described above, when selecting a material for processing the required region (engraving region 3) by laser engraving or the like, it is preferable to emphasize engraving suitability and detergency.

The plate pressure and printing pressure of the conditions (1) and (2) are determined by the mechanical accuracy of the printing apparatus, the setting conditions, etc., and the viscosity (tack value) of the ink is closely related to the color tone, so it is easy. It is difficult to change to. Here, the tack value is the stickiness of the printing ink, and the larger the tack value, the less the transition.

As described above, according to the printing blanket 2 of the present embodiment, since a part of the area is made of a different material from the other area according to various circumstances of the area, the cover of the can body W or the like is covered. A desired ideal print pattern can be printed on the print body. Specifically, since one area 21 for halftone dot printing on the blanket 2 is made of a high-hardness material, the occurrence of thickening is suppressed and the halftone dot setting value is equal to the theoretical design value (halftone dot setting value). It is possible to print a desired printing pattern such as a high-definition pattern 4 having high reproducibility. Furthermore, since the other area 25 for solid printing is made of a material having medium hardness or low hardness, the transferability of the ink can be improved, and the characters with sufficient ink density in the image with good ink crushing (no uneven transfer). A desired print pattern such as 45, 46 can be printed.

Further, one region 21 including the engraving region 3 in the blanket 2 is suitable for engraving, such as good cutting accuracy can be obtained during laser engraving, less shavings are scattered, and shavings can be easily removed. Since it is made of an excellent material, a high-precision blanket 2 can be easily and efficiently manufactured.

In the above embodiment, as shown in FIG. 3A, the left half of the blanket 2 is designated as one region (partial region) 21 and the right half is designated as another region (other region) 25, but the present invention is limited to this. However, in the present invention, the position of one area in the blanket may be determined according to appropriate conditions such as printing specifications, and in short, one area 21 may be set in at least a part of the blanket. For example, as shown in FIG. 3B, the right half of the blanket 2 is set in one area 21, and as shown in FIGS. 3C and 3d, the upper half or the lower half of the blanket 2 is set in one area 21. As shown in FIGS. (E) and (f), the blanket 2 is divided into three in the left-right direction (can circumference direction), and the center or both sides are set in one area 21, or the blanket is set in the vertical direction (can). It may be divided into three in the axial direction), and the center or both sides may be set in one area 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.

Further, in the above embodiment, the case where the blanket 2 is composed of two kinds of materials in one region and the other region has been described as an example, but the present invention is not limited to this, and in the present invention, the blanket is made of three or more kinds of materials. It may be configured by.

Further, in the above embodiment, the case of printing in two colors has been described as an example, but the type of color is not limited to two colors, and in the present invention, printing may be performed in three or more colors. For example, a printing device capable of supplying eight colors of ink can print in eight colors. In other words, the number of colors in the print pattern can be changed according to the ink supply capacity of the printing apparatus.

Further, the type of blanket to be 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 apparatus to which 12 blankets are attached, 12 types of blankets can be used.

Further, in the above embodiment, the case of printing on a can body (beverage can) has been described as an example, but the present invention is not limited to this, and in the present invention, a printed object other than a beverage can, for example, a flat printed surface. It can also be applied when printing on a printing body.

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

1,11,12: Printing plate 2: Blanket (blanket for printing)
21: One area (partial area)
25: Other area (other area)
3: Engraving area (unevenness area)
3a, 3b: Convex portion for printing W: Can body (printed object)

Claims (8)

A printing blanket in which a predetermined printing pattern is printed on a printing object by transferring the ink transferred from the printing plate to the printing object.
At least some areas are made of different materials than others
A printing blanket, wherein a part of the region includes an uneven region on which unevenness is formed. The printing blanket according to claim 1, wherein the uneven region is formed by cutting. The printing blanket according to claim 1 or 2, wherein the uneven region is formed by laser engraving. The printing blanket according to any one of claims 1 to 3, wherein the partial region is formed to have a hardness higher than that of the other region. The printing blanket according to any one of claims 1 to 4, wherein the other area is an area for solid printing. A printing plate and a blanket are provided, and the ink on the printing plate is transferred to the blanket, and the ink transferred to the blanket is transferred to the printing object to obtain a predetermined printing pattern on the printing object. Is a printing device that prints
A printing apparatus, wherein the blanket is composed of the printing blanket according to any one of claims 1 to 5. The printing apparatus according to claim 6, wherein the printed body is made of a can body made of aluminum or an aluminum alloy used for a container of a canned beverage. When a predetermined print pattern is printed on a printing object 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 object. It is a printing method that I tried to do
A printing method characterized in that the printing blanket according to any one of claims 1 to 5 is used as the blanket.

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