JP6875807B2 - Multicolor gravure offset printing equipment and printing method - Google Patents

Description

The present invention relates to a printing apparatus and a method for performing multicolor gravure offset printing work on printed matter of various shapes within one rotation of a gravure blanket roll (hereinafter referred to as one printing cycle). More specifically, the present invention is suitable for a three-dimensional three-dimensional print object having a bent structure including a flat surface, a bottle shape or a thick asymmetric shape, or a three-dimensional three-dimensional object itself made by a 3D printer, respectively. The present invention relates to a multicolor gravure offset printing apparatus and a printing method in which the above colors are printed in layers, and multicolor gravure printing is performed and dried within one printing cycle.

Conventionally, multicolor gravure offset printing is a method of installing a plurality of plate cylinders around a drum having a single large radius described in Japanese Patent Application Laid-Open No. 9-277491, or a method of arranging a plurality of drums in parallel (special feature). Open 2008-168578) and the like. However, in reality, it is often difficult to adjust the position of the drum itself, guarantee the reproducibility, and maintain and reproducibility of the printing accuracy on the order of 100 μm width or less by moving the printed matter by a conveyor method. Further, there are often various accuracy difficulties caused by a plurality of drums, such as distortion of parallel accuracy of a plurality of drum installation positions due to temperature change, determination of parallel positions, and the like. In addition, even if the width can be reduced to less than this, the thickness is about several μm, and there are problems such as high electrical resistance and insufficient color depth, and high-performance printed matter that satisfies the above. From the viewpoint of economical and highly efficient printing, there are problems to be solved such as difficulty in fully automated / parallel / parallel processing and changes in print quality over time during printing. Alternatively, during the drying process, if ultraviolet rays (UV) partially hit the blanket roll, the UV ink easily solidifies and damages the roll. Due to the structure of these series of printing methods, printing distortion due to guaranteeing the printing wall thickness, etc. Compared to the silk printing method, there were many factors that hindered the spread of gravure offset printing.

JP-A-9-277491 Japanese Patent Application Laid-Open No. 2008-168578

The present invention is a printing apparatus and a method for performing gravure offset printing on a three-dimensional shape such as a flat surface, a cylindrical surface, or three-dimensional shape using one blanket roll in one printing cycle (= one rotation of a blanket roll). Is the subject to be solved by the invention.

Another problem to be solved by the present invention is to provide a printing apparatus and a method thereof capable of printing a plurality of desired colors in one printing cycle by a printer.

In order to achieve the above object, the present invention comprises a cylindrical blanket roll that moves in a first direction while rotating, and an ink transfer unit that includes one or more ink transfer plates that are in contact with the lower end of the blanket roll. A Gravure offset printing apparatus including a squeegee portion that moves in a second direction with one end in contact with the ink transfer plate, wherein the second direction is at a predetermined angle with the first direction. Alternatively, an orthogonal gravure offset printing apparatus is provided.

According to the present invention, there is an effect that gravure offset printing can be performed on various forms of printed matter within one printing cycle. In particular, gravure offset printing is possible not only on flat printed matter but also on cylindrical printed matter and three-dimensional three-dimensional printed matter having a thickness including a bent structure.

Further, according to the present invention, since inks of a plurality of colors can be printed so as to overlap each other at the same position on the printed matter, it is possible to combine the colors of the inks and print a desired color within one printing cycle. Has the effect that can be done.

Further, according to the present invention, since mass printing on a plurality of printed matter is possible within one printing cycle, it is possible to improve the printing speed and the economic efficiency through the printing speed.

Is a drawing showing the overall configuration of the gravure offset printing apparatus according to the present invention. Is a drawing illustrating a form in which ink is supplied from the ink supply unit to the transfer unit. Is a drawing showing that a transfer plate on which a fine engraved pattern is printed is placed on a transfer plate support base of the transfer unit. Is a drawing showing the operating state of the blade portion. Is a cross-sectional view showing the operating state of the blade portion. Is a drawing showing that ink is transferred from the transfer plate to the roll. and Is a drawing showing still another embodiment of the squeegee blade portion according to the present invention. Is a drawing showing the length of each component of the transfer plate and the roll and the transfer state of the multicolor ink with respect to the roll. Is a drawing illustrating a printing unit including a three-dimensional printed matter. Is a drawing showing that the printed matter support base rotates vertically in the vertical direction with respect to the first direction. Is a drawing showing that each printed matter on the printed matter support rotates horizontally around the z direction. Is a drawing showing that the first ink portion is printed on a flat printed matter. Is a drawing showing that after the printing of the first ink portion is completed, the printing portion moves horizontally for printing of the second ink portion. Is a drawing showing that the second ink portion is printed so as to overlap the printed matter on which the first ink portion has already been printed. 11 is a drawing showing that the printed matter support rotates vertically according to the height of the three-dimensional printed matter and the distance between the rolls. Is a drawing showing that a large number of printed matter is arranged in parallel on a printed matter support in the vertical and / or horizontal direction. Is a drawing illustrating the dried portion. Is a drawing showing that the printed matter moves to a position for printing of the second ink portion after the ink is dried by the drying portion after the printing of the first ink portion is completed. Is a drawing showing an example of a mobile drying unit of still another embodiment that moves according to the movement of the roll. Is a drawing showing a printed portion when it is a cylindrical printed matter. Is a drawing showing that after the first ink portion is printed on the cylindrical printed matter, the first ink portion is printed on the printed matter already printed. Is a drawing showing still another embodiment of the dried portion when it is a cylindrical printed matter.

Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 is a drawing showing an overall configuration of a gravure offset printing apparatus according to the present invention.

The gravure offset printing apparatus of the present invention has a flat printing shape in appearance, and a blanket roll 100 that moves while rotating along a pair of parallel straight rails, an ink supply unit 200 that uniformly applies ink to an ink transfer unit, The print pattern to be printed so as to be in contact with the lower end of the blanket roll is transferred to the blanket roll. One or more ink transfer units 300 (FIG. 2) are located in front of the moving direction of the blanket roll and are transferred to the blanket roll. It includes a printing unit 400 in which a printed matter on which the printed ink (printing pattern) is printed is located, and additionally includes a drying unit 600 for drying and cooling the ink printed on the printed matter.

Hereinafter, the blanket roll 100 will be described in detail.

The blanket roll 100 (hereinafter referred to as a roll for convenience of description) has a cylindrical shape or a cylindrical shape (not a perfect cylindrical shape, but an elastic shape that can be approximated to a cylindrical shape, hereinafter referred to as a cylindrical shape). In the example, the cylinder moves horizontally in the first direction shown in FIG. 1 while rotating counterclockwise. For this reason, although not shown in the present drawing, the roll 100 is configured to be able to move along the guide rail 110 as much as possible by rotation so that the roll can move horizontally at the same time as the rotation length of the roll. Is preferable. That is, the blanket roll 100 horizontally moves in the first direction at the same speed as the rotation speed.

The material of the blanket roll 100 is, for example, a so-called rubber roll containing one or a combination of Teflon, silicone, vinyl chloride, urethane, epoxy and the like as a main component. As yet another embodiment, the material of the roll may be a combination such as containing inorganic particles in the main component. This depends on the intermolecular force between the ink and the printed matter, and is closely related to the condition that the difference in enthalpy between the ink and the material of the printed matter per unit volume is small. This is approximately a necessary condition, especially when the intermolecular force is strong.

The material of the printed matter can be very diverse, for example, an elastic polymer, an organic substance such as plastic, glass, a silicon substrate used for a semiconductor or a solar cell, other metals, paper, and the like.

The hardness of the blanket roll 100 is JIS-A standard 40 degrees or less and 0 degrees or more at room temperature (25 degrees C), and in particular, it has a roll thickness of 0.5 to 40 times the thickness of a three-dimensional printed matter. When there is a metal shaft core in the center of the blanket roll, the thickness of the roll means the remaining portion excluding the metal shaft core.

The rotation speed (and movement speed in the first direction) of the roll during transfer is 0.5 to 12 m / min on the transfer unit 300, and the rotation speed of the roll is important for ink transfer to the blanket roll in gravure offset printing. It is for satisfying the equation of motion for ink. It can be said that such a feature is a fundamental difference from pad printing / tampo printing or screen printing method.

That is, since blanket rolls have an appropriate Nip length, especially rolls with low intermolecular forces are required (for example, in the case of conductive inks containing precious metals such as silver) ascending fluid of ink. In order to ensure physical motion, the speed of the roll in the first direction during roll printing is preferably 0.5 to 12 m / min.

Further, it is preferable to select an intermolecular force between the ink transferred to the roll and the printed matter in consideration of the above-mentioned enthalpy and the like. This makes it possible to promote and optimize the movement of ink during printing.

In addition, the major difference between this method and the printing method of other formats is that the ink of the plate is accurately copied onto the gravure roll of this method, so that precise reproducibility can be guaranteed. It is possible to easily perform high-speed overprinting.

Hereinafter, the ink supply unit 200 will be described in detail with reference to FIG.

Although only one color can be used for the ink (I), the present invention assumes multicolor printing and has the following plurality of colors (in the attached drawing and the following examples, the ink portion having each of the four colors (ink portion (I)). I1, I2, I3, I4) are used. Hereinafter, for the sake of explanation, the first (I1), second (I2), third (I3) and fourth (I4) from the right side when viewed from FIG. Referred to as an ink portion. As a preferred embodiment, the four colors are four colors according to the CMYK (Cyan, Magenta, Yellow, Key plate / Black) hue table, and as a more preferred embodiment, the resistance to alcohol is enhanced. Therefore, UV varnish or the like can be added as the final ink.

For each color, the ink is dropped simultaneously through a plurality of ink syringes 210 having a predetermined interval (L + Δ). At the same time, the plurality of ink syringes 210 move by the width (L) of the ink required in the first direction (x direction) through a horizontal moving means such as a linear actuator, and move while dripping the ink liquid linearly. Further, although it is expressed as a multicolor ink in this description, this is an embodiment of the invention, and includes a transparent organic substance other than the ink, a varnish, and an ink having different properties even if the ink has the same color.

The blade of the squeegee portion 230 moves in the second direction (y) orthogonal to the moving direction (first direction (x)) of the blanket roll 100 in a state of being in contact with the transfer plate 310 of the ink transfer portion, and the ink The ink linearly supplied by the syringe is filled in the transfer intaglio groove / intaglio.

At this time, the width of the ink supplied must be adjusted so that the colors are not mixed with each other. In the embodiment of the present invention, for the sake of simplification of the description, the width to which the ink is supplied and the width of the ink transfer plate 310 on which the inscribed pattern is formed are all indicated as L. That is, the ink is linearly supplied by the width (L) of the ink transfer plate 310. However, it is not always the same L width depending on the purpose.

As shown in FIG. 2, a plurality of ink transfer plates 310 may be provided. In this case, the ink transfer plates have a transfer plate support base at a predetermined interval (Δ) so that the inks are not mixed with each other. It can be placed on the 330 in the format of FIG. Although the ink transfer plate 310 is shown as a rectangle for convenience of explanation, it does not necessarily have to be a rectangle and can have various shapes as needed.

Hereinafter, the squeegee step of filling the inscription pattern on the ink transfer plate 310 through the blade with reference to FIGS. 3 and 4 will be described.

FIG. 3 shows four ink transfer plates 310 arranged on the plate-shaped transfer plate support 330 of the ink transfer unit 300.

The ink transfer plate 310 may preferably be a metal plate or a resin film capable of processing a fine intaglio pattern.

The ink transfer unit 300 has a configuration in which the ink in the inscription pattern 311 is transferred onto the surface of the blanket roll 100, and one or more ink transfer plates 310 are fixed on the plate-shaped support base 300. Since the ink transfer plate 310 will transfer ink to the roll 100 in the future, the ink transfer plate 310 must be fixed in an accurate position for multicolor printing described later.

As a first fixing method for fixing the ink transfer plate 310 on the support base, a vacuum pressure generated through a vacuum generating portion (not shown) is generated through the vacuum holes 335, and the ink transfer plate 310 made of a film material is placed on the support base 330. It can be fixed so that it does not move. As a second fixing method, the ink transfer plate 310 is fixed on the support base using double-sided tape 336. As a third fixing method, it can be fixed with a clasp, a rotary fixing screw, or the like.

FIG. 4 shows that the blade portion of the squeegee portion 230 fills the inscription pattern on the ink transfer plate 310 while moving in the second direction orthogonal to the first direction in which the roll 100 moves.

However, in FIG. 4, it is shown that the blades of the squeegee portion 230 are orthogonal to the moving direction (first direction (x)) of the blanket roll 100, but they are not orthogonal to each other and have a predetermined angle (an angle other than 180 degrees (that is, an angle excluding 180 degrees)). , Non-parallel angles)).

An inscription pattern 311 is formed on the ink transfer plate 310. As a method for forming an engraved pattern on a resin film, there is an imprint method that is already widely known, and since this is a known technique, detailed description thereof will be omitted.

The blade of the squeegee portion 230 is filled with ink into the fine engraved pattern 311 while pushing the ink (I) in the second direction with one end in contact with the ink transfer plate 310 like a doctor blade having a linear shape at one end. Play a role. FIG. 5 is a drawing showing how the ink (I) fills the fine inscription pattern 311. In this way, the ink (I) is filled only in the fine engraved pattern 311, and then the ink is based on intermolecular force and hydrodynamic motion while moving and rotating in the first direction with the roll 100 in contact with the ink (I). It is pulled up by force and transferred to the surface of the roll (Fig. 6).

In a preferred embodiment of the present invention, the blade corresponds to the shape of the protrusions or recesses 331, 332, 333 of the support base 330 formed to prevent color mixing between inks, and is one of the blades at one end. The shape of the part may change.

In FIG. 4, a total of four ink transfer plates 310 are provided, each ink transfer plate 310 has the same width (L), and each ink transfer plate has a predetermined distance (Δ) from each other. As described above, since the supply width of ink (I) is also L, when the blade moves in the second direction while pushing the ink, the ink flows on both sides and enters the ink transfer plate located adjacent to each other, and the ink enters. May be mixed with each other.

In order to prevent this, the transfer plate support 330 is provided with recesses 331, 333 or protrusions 332 at the interval (Δ) so as to extend in the second direction, and ink can be prevented from being mixed. ..

At this time, a part of the shape in one end of the blade may have the shape of the protrusion or the recesses 231 and 232 corresponding to the shape of the recess or the protrusion. Of course, when the transfer plate support base has the shape of the concave portions 331 and 333, a part of the blade does not necessarily have the shape of the convex portion 231. However, when the transfer plate support base has the shape of the protruding portion 332, the blade For smooth movement of the portion, it is desirable that a part of the shape in one end of the blade portion has a concave portion 232 corresponding to the shape of the convex portion 332 of the support base.

As yet another preferred embodiment, after filling the fine engraved pattern with the ink through the blade portion, an auxiliary roller or the like for appropriately wiping off the excess ink can be installed. The auxiliary roller automatically wipes off the ink attached to the blade portion as needed, and is set to wipe off the ink on the blade portion every predetermined number of times according to the viscosity and the amount of ink used. can do.

Yet another embodiment of the squeegee blade portion according to the present invention will be described with reference to FIGS. 7 and 8.

As shown in FIG. 7, the squeegee blade portion of the ink supply portion 200 has two second blade portions having a predetermined angle (a + b) with each other and arranged obliquely about the blade rotating portion 260. It can be composed of one blade 230a and a second blade 230b (hereinafter, this embodiment is referred to as a double blade). In this case, the ink syringe 210 is also composed of a first ink syringe 210a arranged on the first blade side and a second ink syringe 210b arranged on the second blade side with the blade rotating portion 260 as the center. This is a configuration in which the ink supply unit 200 can perform the ink supply and squeegee work even when the ink supply unit 200 moves the ink in the second direction and then returns to the original position.

The operation of the double blade will be described below with reference to FIG.

FIG. 8a is the end face of b − b'of the ink supply unit 200 of FIG. 7 when the first ink supply is performed before the roll 100 still enters the transfer unit. The first ink syringe 210a supplies ink to the transfer unit, and moves in the second direction with one end of the second blade 230b in contact with the transfer plate 310. At this time, the second ink syringe 210b does not supply ink. The blade rotating portion 260 rotates so that one end of the second blade comes into contact with the transfer plate 310, and the second blade has a predetermined angle (b) with respect to the vertical axis about the blade rotating portion. At this time, the first blade 230a has an angle (a) larger than the angle (b) of the second blade 230b with respect to the vertical axis about the blade rotating portion so that one end does not come into contact with the transfer portion (a). > b).

FIG. 8b is a drawing showing that after the first ink supply is completed and the roll 100 has already passed through the transfer unit, the ink supply unit 200 returns to the original position to supply ink and perform squeeging work. Contrary to the case of FIG. 8a, the second ink syringe 210b supplies ink to the transfer unit, and the second ink syringe 210b moves in the opposite direction of the second direction while keeping one end of the first blade 230a in contact with the transfer plate 310. At this time, while one end of the second blade 230b does not come into contact with the transfer portion, the blade rotating portion rotates so that one end of the first blade 230a comes into contact with the transfer portion.

According to the double blade configuration shown in FIGS. 7 and 8, the ink is supplied because the ink can be returned to the original position after the first ink supply is completed and at the same time, more ink can be supplied for the next ink transfer. Work efficiency and economy are improved.

In particular, this significantly enhances the workability and economic efficiency of printing based on the workability and shortening of printing time because printing on the printed matter and ink supply and squeegee work can be performed independently.

In addition, the blade wipes the blade independently during printing on the printed matter without loss of printing time, if necessary, with a waste, wiper, or Kimwipe placed outside the roll path in the second direction. It also has the feature that it is easy to aim for beautiful printing.

Further, as the movement range of the ink supply unit 200, the start ink line linearly supplied on the transfer plate from the ink supply start point to the end point does not enter the roll movement range when moving in the first direction of the roll. To. That is, as a whole, the ink supply unit 200 that moves in the second direction supplies the ink onto the transfer plate, and then performs the squeeging work with the blade while moving in the second direction.

Further, here, when the blade separates from the ink at the end of the squeegee work, the blade transfer plate and the ink molecules each have an intermolecular force, so that the ink residue remaining on the back side of the blade is between the above-mentioned molecules. Due to the force, it is divided into transfer plates and blades, resulting in residual ink lines. As with the start ink line, the position of the last blade of the squeegee (the position of the residual ink line) must not be within the range of movement of the roll in the first direction. Therefore, the moving distance of the blade in the second direction must be moved beyond the length of the roll in the second direction so as not to fall within the moving range of the roll.

After that, the roll moves while transferring the ink from the transfer plate while preventing the start ink line and the residual ink line from entering the first direction movement range.

In the subsequent operation, the roll leaves the transfer area and enters the print area, so that the squeegee section and the ink supply section can each move independently. Therefore, for the next printing, the transfer plate as described above. The operation of supplying ink to the printer becomes possible.

In order to reduce the residual ink line, as described above, the blade and squeegee operations that move in the opposite direction of the second direction are additionally performed to maintain the print quality, protect the roll, and economically supply the ink. Can be enhanced.

FIG. 9 is a drawing illustrating an overall form in which the roll 100 receives ink transfer from the ink transfer plate 310 while moving in the first direction.

In FIG. 9, the ink on the ink transfer unit 310 has a width of only L and an interval (Δ) between them. As described above, the ink is transferred from the transfer plate 310 to the roll 100 by an upward force based on the intermolecular force between the ink and the roll 100 and the fluid dynamics (fluid equation).

Based on this, the radius (r) of the roll 100 illustrated in FIG. 9 is greater than or equal to [N (L + Δ) + δ] / (2π). In the examples of the present specification, for convenience of explanation, the radius (r) of the roll will be described below as being the same as [N (L + Δ) + δ] / (2π).

Here, N means the number of colors used at the time of printing, and the number of colors when the print shape is different even for a single color in a three-dimensional printed matter (for example, the same color is overprinted again by rotating in the θ direction). Alternatively, N can be said to be the number of transfer plates. As an example, in the examples of FIGS. 1 to 4 of the present invention, N is 4 because ink portions (I1, I2, I3, I4) = 4) having different colors are used. If the three-dimensional printed matter is rotated in the θ direction as described later, the same color is printed again, so N = 4 × 2 = 8. However, for the sake of simplification of the explanation, the whole outline will be explained once by omitting the θ rotation and setting N = 4.

As described above, L is the width of the ink applied on the transfer plate, and for simplification of the formula, it is rotated in the θ direction as described above, and it is assumed that it is the same when printing in different directions, and the amount is fixed. Further, Δ is the distance between the transfer plates (inks) to prevent color mixing of the inks. At this time, δ means a minute correction amount depending on the pressure of the roll, etc., based on the change in the length of the radius (creating a nip) that occurs when the elastic roller comes into contact with the transfer plate and the printed matter, respectively. To do. If the nip does not occur in the limit (δ = 0), the length of the outer circumference of the roll 100 is the length in the first direction of a predetermined interval between each ink transfer plate and each ink transfer plate. It will be the sum of the lengths or longer.

The following formula is obtained by generalizing the outer peripheral length of the blanket roll 100.

Here, L _i means the length of the i-th transfer plate in the first direction, and Δ _j means the length of the interval between the plates in the first direction following the j-th transfer plate.

In FIG. 9, since the ink transfer plates 310 have the same size, the same printing position points (X1, X2, X3, X4) on the ink transfer plates are L in the first direction (x). They are separated by + Δ. This is to enable printing while overlapping the inks transferred from the above points (X1, X2, X3, X4) with respect to the same point on the printed matter at the printing stage described later.

As shown at the lower end of FIG. 9, as the roll 100 moves in the first direction while rotating once, the ink on the transfer plate 310 is transferred onto the roll, and then the printing operation on the printed matter starts. That is, the roll 100 makes one rotation and moves in the first direction, and at the same time, the ink on one or more transfer plates is transferred to the surface of the blanket roll.

FIG. 10 illustrates the printed matter 400, and shows a three-dimensional printed matter 410 having a thickness as a printed matter, but the present invention is not limited to this, and the printed matter can be applied to all flat printed matter or cylindrical printed matter.

The printing unit 400 is located on the front surface of the roll 100 in which the ink is transferred through the transfer unit 300 in the moving direction (first direction), and between the pair of guide rails. In FIG. 10, the printed matter 400 is provided with a plate-shaped printed matter support 420, and the three-dimensional printed matter 410 is fixed on the printed matter support.

As a method for fixing the printed matter 410, when the printed matter is flat, a vacuum pressure or a jig such as a double-sided tape or a clasp can be used as in the transfer plate described above. However, when the printed matter 410 is a three-dimensional printed matter, it is preferable to provide a separate fixing member 430 in order to fix the three-dimensional printed matter on the support base 420. In order to print a large amount of printed matter, it is necessary that the printed matter can be easily attached to and detached from the support base and its position is firmly fixed during printing. According to a preferred embodiment, the fixing member 430 is a mold of an organic material such as plastic manufactured by a 3D printer having a shape corresponding to the inner surface of the printed matter. When the fixing member is manufactured by a 3D printer, it is preferable because the fixing member optimized for printed matter of various shapes can be easily generated.

Another major feature of this machine is that it can print and color 3D objects created with a 3D printer.

FIG. 11 is a drawing showing a state in which the printed matter support 420 is tilted up and down with respect to the first direction.

Through the rotating means (for example, a motor, etc.) 460 provided on both sides or one side of the printed matter support 420, the printed matter support 420 may be tilted up and down with respect to the first direction with a predetermined angle (φ). It can be done (hereinafter referred to as vertical rotation of printed matter). Such a configuration is very effective, especially when the printed matter is a three-dimensional printed matter having a thickness (see FIGS. 11 and 16). That is, when the printed matter is generally placed in a horizontal state, the portions 410a and 410b, which cannot be printed well due to the thickness (height) of the printed matter, can be effectively printed by tilting the printed matter in this way.

FIG. 16 shows that the printed matter support 420 tilts up and down with a predetermined angle (φ) with respect to the first direction, and the roll 100 moves in the first direction while rotating without vertical movement. ing. As described above, in the case of a three-dimensional printed matter, it is possible to print even on the portions 410a and 410b, which are difficult to print due to the characteristic that the printed matter support 420 is tilted.

However, since the contact points between the printed matter and the roll differ depending on the degree of inclination of the printed matter, the printed matter must be tilted while maintaining the optimum printing distance. For this reason, it can be seen in FIG. 16 that the height adjustment unit 450 of the printed unit maintains the optimum printing distance while vertically moving up and down according to the degree of inclination of the printed matter.

The printing unit is provided with a printing unit height adjusting unit 450 at the lower end, and the vertical height of the printed matter support 420 can be adjusted. Further, the printing unit is provided with a separate guide rail separately from the guide rail so that the printed matter support 420 can move in the first direction. The printing unit support base 420 can independently move in the vertical direction through the printing unit height adjusting unit 450 and in the horizontal direction through the guide rail.

In FIG. 12, the printed matter 410 on the printed matter support 420 rotates with a predetermined angle (θ) on the support base 420 about the third direction (z-axis) (hereinafter, referred to as horizontal rotation of the printed matter). It is shown that. As will be described later, when the printed matter is a three-dimensional printed matter, the side portion of the printed matter that is not printed well just by printing in the first direction or is raised in the z-axis direction at an obtuse angle. This is for printing. It is preferable that the printed matter support 420 is provided with rotating means for the horizontal rotation of the printed matter, but the printed matter may be manually rotated without providing a separate horizontal rotating means.

FIG. 13 is a drawing showing a form in which the roll prints the first ink (I1) on the printed matter. In FIG. 13, for convenience of explanation, a lithographic printed matter will be used as a reference, but as will be described later, the same applies to a cylindrical printed matter or a three-dimensional printed matter. The printed matter support and the height adjusting portion of the printed matter support are omitted in FIG. 13 for the sake of simplification of the drawings.

In order to explain the printing method with reference to FIG. 13, X1, X2, X3, and X4 described with reference to FIG. 9 will be referred to below. FIG. 13 is a series of starting stages of the multicolor printing method up to FIGS. 14 and 15, as will be described later. For convenience of explanation, the length of the three-dimensional object 410 in the first direction is made the same as L + Δ, but it may be smaller than L + Δ depending on the required print area.

FIG. 13a shows a state immediately after the ink is transferred from the transfer unit 300 to the roll 100 and immediately before the first ink portion (I1) is printed on the lithographic printed matter 410. The roll 100 moves in the first direction while rotating counterclockwise in FIG. In FIG. 13, T means a target position where X1, X2, X3 and X4 are printed so as to overlap each other. In FIG. 13a, T is displayed as T0 because no ink has been printed yet. Looking at the enlarged view of the lower end of FIG. 13a, it is a view immediately before the ink on the roll X1 is printed on the printed matter T0 by moving the roll 100 in the first direction while rotating. FIG. 13b illustrates immediately after the ink X1 (I1) is printed at the position T0. The ink circled in FIGS. 13a and 13b is moving from the roll to the printed matter TX1 to indicate that the ink has been printed. After the ink of X1 was printed on T0, T0 was described as TX1.

In order to print the second ink portion (I2), the roll 100 must move to the same position as the position corresponding to FIG. 13a with the roll 100 stopped rotating and moving in the first direction. Hereinafter, FIG. 14 is a drawing illustrating that the printed portion (printed matter) moves to the next printing position before printing the second ink portion (I2).

FIG. 14a is a drawing showing a state immediately after the first ink portion (I1) is completely printed on the printed matter. As shown in FIG. 13, since the ink (X1) was printed at the print target point (T), it is displayed as TX1. In this drawing, the roll 100 rotates 1/4 turn and moves horizontally by 2πr / 4 in the first direction.

FIG. 14b is a drawing showing that the printed matter is vertically moved downward. The printed matter immediately moves horizontally in the first direction with a linear sludge or the like, but at the same height z as printing, the printed matter rubs against the roll, so the printed matter is moved vertically downward by the minimum required distance first. For this purpose, the printing unit includes a printed matter support base height adjusting unit 450. The height adjusting unit 450 can use all known configurations capable of moving the printing unit up and down in the vertical direction through a driving unit such as a motor.

FIG. 14c is a drawing showing that the printed matter vertically moved downward is horizontally moved in the first direction. At this time, the horizontal movement distance is the same as the rotation distance of the roll 100 so that the second ink portion (I2) is printed so as to overlap the first ink portion (I1) at the same position. 2πr / 4, that is, (L + Δ) + δ / 4 = L + Δ + ε (ε = δ / 4). Here, δ means the amount of change due to a minute change in length that occurs when the elastic roller comes into contact with the transfer plate or the printed matter as described above. ε is a value obtained by dividing the above δ by 4 because the four ink portions (I1, I2, I3, I4) correspond to 1/4 of the roll 100 diameter.

FIG. 14d illustrates that the printing section is vertically moved upward through the height adjusting section 450 and is ready for printing of the second ink portion (I2).

FIG. 15 shows the second ink portion (I2) after the completion of the second print preparation process shown in FIG. 14, that is, with respect to the vertically moved (FIGS. 14b, 14d) and horizontally moved (FIG. 14c) printing portions. It is a drawing which shows to print.

In the second ink portion (I2) printing method of FIG. 15, the difference from FIG. 13 is that the first ink portion (I1) already performed in FIG. 13 is printed on the printing portion. In FIG. 13, the target point on which the ink (X1) is printed is illustrated by TX1, and it can be seen that the roll 100 is rotated 90 degrees counterclockwise as compared with FIG. However, although not shown in FIG. 15, the roll 100 is printed in the first direction by 2πr / 4, that is, (L + Δ) + δ / 4 = L + Δ + ε when printing the first ink portion in FIG. It is in a state of being horizontally moved to.

Since the printed matter moved horizontally in the first direction by L + Δ + ε in FIG. 14, the target point (TX1) on which the ink (I1) was printed moved in the first direction while the roll 100 rotated in FIG. 15a. The ink (X2) of the second ink portion (I2) is printed at the target point (TX1). FIG. 15b is labeled TX1X2 to indicate that after such printing, the two inks (X1 and X2) were printed so as to overlap each other at the target point.

After that, as shown in FIG. 14, the printed matter moves horizontally by L + Δ + ε in the first direction to print the third ink portion (I3) (TX1X2X3), and finally L + Δ + ε is the second. The fourth ink portion (I4) is printed (TX1X2X3X4) by moving horizontally again in one direction.

As described above, assuming that the four ink parts are the colors according to the CMYK hue table, by combining the four inks (I1, I2, I3, I4), any hue (multicolor) can be printed in the desired pattern. It has the effect of being able to print. Above all, since such multicolor printing is possible during one printing cycle (one rotation of the roll 100), the printing time can be saved and mass production is possible.

As yet another embodiment of the printed matter 400 according to the present invention with reference to FIG. 17, when the printed matter is small, a large amount of printed matter can be produced by providing a plurality of printed matter in the first and second directions on the printed matter supporting portion. It becomes possible to print at once.

For example, when the length of the printed matter 410 in the second direction is short, a plurality of printed matter can be arranged in parallel in the second direction orthogonal to the motion direction (first direction) of the roll 100. Alternatively, if the length of the printed matter 410 in the first direction is short (L or less), or if the print pattern is the same in all the ink regions, a plurality of printed matter may be arranged in the first direction. However, in any case, the total length of all printed matter in the first direction must be L or less. Of course, when the size of the printed matter itself is very small compared to the one ink portion, it can be arranged in parallel in both the first direction and the second direction to further increase the productivity per printing cycle. ..

However, although the printing method has been described above relatively simply, it is preferable to perform UV light irradiation for a short time after printing of each color is completed. This prevents other inks from moving onto the other colors of the roll, and the solidification of UV light is often in the π ^* antibonding molecular orbitals, with electrons in the original low energy orbitals. Photon energy is selectively given to perform electronic transitions, which increases the probability of electron clouds overlapping, and because it is a method in which reactions occur and solidify, even inks with organic substances that match the frequency of UV light are available. For example, it can be solidified in an extremely short time.

FIG. 18 illustrates a drying portion 600 that dries the ink printed on the printed matter.

As described above, in the case of the present invention, since multiple colors or various kinds of inks for the same printed matter are printed in an overlapping manner within one printing cycle, the inks before the overlapping printing are dried for each color printing. There is a need. Of course, depending on the type of ink and the characteristics of the printed matter, it may be possible to dry all the inks at once after the printing process is completed. This means that, for example, when printing once, rotating θ with the same color, and printing again, of course, UV irradiation is not required during that time.

First, the composition of the dried portion changes depending on the properties of the ink, but in the case of the present invention, it will be described on the assumption that UV ink is used. Since UV ink can quickly dry ink by the above principle only by irradiating the ink with ultraviolet rays, it is preferable for the present invention in which the printing speed is increased and mass production is aimed at.

As shown in FIG. 1, the drying portion 600 is located on the moving direction of the roll 100, that is, on the extension line of the first direction. However, the present invention is not limited to this, and according to the following examples, the rolls 100 may be arranged in the opposite direction of the first direction with respect to the roll 100. As a preferred embodiment, as described below, the drying unit 600 includes a fixed type that is fixed at a fixed position and a mobile type that moves by moving the printing unit 400.

The drying unit 600 includes the UV irradiation unit 610 that irradiates the UV light and the UV light between the UV irradiation unit 610 and the roll 100 so that the UV light is not irradiated to other positions other than the printed matter, particularly the roll 100. Includes a UV blocking section 620 that blocks Optionally, the drying section 600 can include a cooling section 630 to prevent deterioration, deformation, and discoloration of the printed matter due to heat generated by UV light.

FIG. 19 is a drawing illustrating a fixed type drying portion.

19a and 19b show that the drying portion 600 is arranged on the extension line side of the roll 100 in the first direction in FIGS. 14a and 14b. As shown in FIG. 14, the printing unit 400 vertically moves the printed matter on which the first ink portion (I1) is printed through the printing unit support base height adjusting unit 450. After that, in FIG. 14, the second ink portion (I2) is immediately moved to the printing position (horizontally moved by L + Δ + ε in the first direction, see FIG. 14c), but in FIG. 19c due to drying. It moves horizontally to the position in the first direction where the drying part is located. After that, the drying unit 600 irradiates the printed matter with UV by the UV irradiation unit 610, and selectively performs the cooling operation by the cooling unit 630 for cooling. The UV blocking unit 610 is arranged between the UV irradiation unit 610 and the roll 100 so that the inks (I2, I3, I4, especially I2 and I3) on the roll 100 that have not been printed on the printed matter at the time of UV irradiation are not irradiated with UV. Will be done. After that, the printed portion that has been dried in a short time horizontally moves to the same position as in FIG. 14c (only L + Δ + ε in the first direction from the position where the first ink portion was printed) (FIGS. 19d and 19e). ).

In this way, if UV irradiation is performed for a short time corresponding to the number of colors, continuous printing can be repeated within one roll rotation.

However, as shown in FIG. 19, when the fixed drying portion is used, the distance that the printing portion moves horizontally becomes longer for each printing of each ink, and as a result, the printing time becomes longer by a maximum of about 4πr / V. (V is the moving average velocity, r is the radius of the roll).

FIG. 20 is a drawing illustrating a mobile drying portion that moves in the first direction together with the roll 100.

In FIG. 20, unlike the fixed drying portion of FIG. 19, the drying portion 600 is arranged in the direction opposite to the first direction with respect to the roll 100. However, after the ink is transferred from the transfer unit 300 to the roll, the movement of the roll 100 must not be hindered when the first ink portion (I1) is printed, so that it is higher than the roll diameter (2r) in the vertical direction. It is preferable that it can be moved up and down in the (z direction). However, the present invention is not limited to this, and the roll 100 may be configured to move together after the roll 100 even when the transfer is performed on the transfer portion of the roll 100. However, in any case, after the printing of the first ink portion (I1) is completed, the ink portion (I1) moves in the first direction together with the roll 100 after the roll 100.

In the case of the mobile drying unit 600 shown in FIG. 20, the printed matter that has moved in the first direction together with the roll 100 and has been printed can be dried immediately after printing without moving horizontally. Therefore, it has an advantage that the printing speed is faster than that of the fixed drying portion shown in FIG.

Further, also in the mobile drying unit 600, a UV blocking unit 620 for preventing UV irradiation on the roll 100 is arranged between the UV irradiation unit 610 and the roll 100.

Hereinafter, specific examples of each of the three types of printed matter in the multicolor gravure offset printing apparatus according to the present invention will be described.

First, as a first embodiment, a case where the printed matter is a flat printed matter will be described.

Four colors are applied to the transfer plate 310 installed in the transfer unit 300, and the roll 100 transfers the ink to the roll while rotating and horizontally moving in the first direction. As in the above embodiment, the rolls have a length of each ink portion (I1, I2, I3, I4) of L and have a distance of Δ from each other. After that, the roll 100 horizontally moves to the printing unit 400 while rotating in the first direction. Hereinafter, the printed matter will be described assuming a flat printed matter such as a solar cell. Here, the plane is not a plane in which the height of the plane does not change at all, but the height change of the printed matter does not affect the printing (assuming about 1 mm or less), and the height changes over the entire plane. A shape close to a flat surface with almost no Examples are paper and semiconductor surfaces including solar cells.

The roll 100 approaches the printed matter 400 fixed to the printed matter supporting plate in a state of being placed on the slider of the first guide rail by using a linear actuator or the like. At this time, in the case of lithographic printed matter, it can be fixed through a double-sided tape or a jig such as a vacuum or a clasp or a fixing device as in the above-described transfer plate fixing method. After that, printing is performed by horizontally moving in the first direction while rotating with the lower part of the roll in contact with the printed matter located on the front surface of the roll.

After that, the predetermined position (X1) of the first printed portion (I1) is printed on the printed matter, and when the printing of the first printed portion (I1) is completed (TX1), the rotation and horizontal movement of the roll 100 are stopped. In this state, the printed matter moves downward through the printed matter support height adjusting unit 450, and then horizontally moves (and moves upward again) in the first direction by L + Δ + ε. If the pressure is weak so that the nip of the roll 100 does not occur on the flat printed matter and the ink plate, ε becomes 0. After that, the roll 100 is continuously rotated and horizontally moved to print the second printed portion (I2). At this time, since the printed matter is in a state of being moved by L + Δ + ε in the first direction, the printed matter is printed so that the predetermined position (X2) of the second printed portion (I2) overlaps the ink (X1). TX1X2). In such a method, since the four printing portions (I1, I2, I3, I4) are overlapped in four layers, multicolor printing is possible.

As a second embodiment, a case where the printed matter is a cylindrical printed matter will be described with reference to FIG. However, since the portion of the roll 100 from the transfer plate to the portion where the ink is transferred is the same as that of the first embodiment, the description thereof will be omitted. For example, a bottle such as a cosmetic bottle or a cylindrical surface having a deformed surface is also included in this.

The difference from the first embodiment is that the cylindrical printed matter is raised in the lateral direction, and the cylindrical printed matter is provided with rotating means 460 at either one of the two ends or both ends of the cylindrical printed matter. The point is that it can rotate 360 degrees around the direction (longitudinal direction of the cylinder). At this time, the rotation direction of the printed matter is opposite to the rotation direction of the roll 100. That is, if the roll 100 rotates counterclockwise in the above embodiment, the cylindrical printed matter rotates (counterclockwise) in the clockwise direction. At this time, the rotation of the cylindrical printed matter must be controlled at a constant speed in synchronization with the rotation of the roll 100 so that the portion of the cylindrical printed matter in contact with the roll does not slip. In addition, the rotating means installed at both ends of the cylinder are provided with fixtures to prevent the printed matter from slipping.

After that, the printing method of the first ink portion (I1) is the same as that of the first embodiment except that the printed matter is cylindrical and rotates with the roll. That is, in the second embodiment, the length of the printed matter means the circumference of the cylinder.

Then, as in the first embodiment, the roll 100 vertically moves the cylindrical printed matter downward in the stopped state, and then horizontally and vertically moves to the printing position of the second ink portion (I2) to move the second ink portion (I2). Finish the printing preparation of the ink part. After that, the roll 100 rotates and moves horizontally again to return to the same position as the position (TX1) where the first ink was printed, and the second ink is printed by aligning the phases of the rotation angle φ of the printed matter (the second ink is printed). TX1X2).

Hereinafter, still another embodiment of the cylindrical printed matter will be described with reference to FIG.

In the case of the second embodiment described above, after the cylindrical printed matter is moved downward in order to print the second printed portion, it must be horizontally moved by L + Δ + ε and moved upward again. There is a problem that the printing time becomes longer by a maximum of about 4πr / V by the time required for the printed matter to move (V is the moving average speed, r is the roll radius). In addition, it takes a long time to print because it comes back to the point where the drying portion 600 is located for drying.

However, in the case of a cylindrical printed matter, unlike the flat printed matter of the first embodiment and the three-dimensional printed matter of the third embodiment, the cylindrical printed matter rotates while moving with the movement of the roll 100 in a state of being in contact with the roll 100. Multicolor printing can be performed. That is, in the case of the other embodiment, the printed matter does not move horizontally while being printed, but in the case of the cylindrical printed matter, the roll 100 moves in the first direction at the same speed as the horizontal movement while printing. The above-mentioned feature that the horizontal movement of the printed matter is not required, including the purpose of drying (described later), can be noted as an efficient printing method including printing and drying.

FIG. 22a shows a state in which the first ink portion (I1) is printed in a state where the cylindrical printed matter 410 is in contact with the roll 100 to which the ink is transferred. Like the flat printed matter, the roll 100 moves in the first direction while rotating, and in synchronization with this, the cylindrical printed matter moves horizontally at the same speed as the first direction movement speed of the roll 100 while rotating in the opposite direction to the roll 100. However, the first printed portion (I1) is printed on the cylindrical printed matter (FIG. 22b). The velocity referred to here is the relative velocity of the tangential surfaces of the plane, not the angular velocity of the roll and the bottle. In FIG. 22, the peripheral length of the cylindrical printed matter is 1/4 of the peripheral length of the roll 100. Therefore, when the roll 100 rotates 1/4 turn, the cylindrical printed matter rotates once and remains in the same state as in FIG. 22a (however, horizontally). Is placed (moves by L + Δ + ε) (see Figure 22c). In FIG. 22c, the target printing point (T) is shown as TX1 with the first printed portion (I1) printed as in the first embodiment. After that, when the second printed portion (I2) is printed together with the rotation and horizontal movement of the roll 100 in the same manner as the printing of the first printed portion, the cylindrical printed matter 410 also rotates in the reverse direction and moves horizontally, and the second print is performed. The part is printed. As a result, since the second printed portion is printed at the same position where the first printed portion is printed, the ink (X2) is printed so as to overlap the target point (TX1), resulting in TX1TX2.

Referring to FIG. 23, in this case, the drying portion 600 is located on the lower end of the cylindrical printed matter or diagonally on the front surface in the first direction, and moves in the first direction with the horizontal movement of the roll 100 and the cylindrical printed matter. At this time, as in the first embodiment, the UV blocking unit is located between the UV irradiation unit and the roll 100 to block and shield the UV from being irradiated to the ink transferred to the roll.

In this way, when the cylindrical printed matter and the drying portion move in the first direction together with the roll, unnecessary operations such as the movement of the cylindrical printed matter in the horizontal direction can be reduced as in the first embodiment, and the separate drying portion can be reduced. There is no need to move to, and it has the effect of being able to perform multicolor printing and quickly proceed to drying.

In addition, it is important that the UV ink is dried during printing, particularly when irradiating from the diagonally right side of FIG. 23, so that the printing efficiency is remarkably increased, which contributes to the reduction of the printing time and the economic efficiency.

As a third embodiment, a case where the printed matter is a three-dimensional printed matter having various thicknesses on the z-axis will be described. However, since it is basically the same as the first and second embodiments, the same contents will be omitted.

In the third embodiment, the three-dimensional printed matter is the printed matter 410 shown in FIGS. 10 to 12. When referring to FIG. 10, of the shapes of the printed matter 410, the surface close to vertical from the paper surface is indicated as surfaces 410a, 410b, 410c, 410d rising vertically in the substantially z direction, which is difficult to print in the drawing. As described above, even if the elasticity of the roll 100 is large, it is not easy to print such a portion when the printed matter is placed on a flat surface as it is. That is, the closer the JIS-A hardness is to 0, the more the roll 100 can cover a certain thickness (height), but if the hardness is too low, the roll will be subjected to vertical pressure during printing due to such a surface. An oblique horizontal component force based on the elasticity of the roll is generated, which causes problems that the roll spreads locally, the print is crushed as a result, and the life of the roller is shortened.

Therefore, in FIGS. 11 and 16, in order to effectively perform printing on the surfaces 410a and 410b in the first direction with respect to the direction in which the first printed matter is placed in such a difficult-to-print surface, through the rotating means. It has been described that the printed matter is rotated so as to have a predetermined angle (φ) with respect to the first direction.

However, even with the methods shown in FIGS. 11 and 16, it may be difficult for the rollers traveling in the first direction to print on the difficult-to-print surfaces 410c and 410d. Therefore, in this case, as shown in FIG. 12, it is necessary to rotate each printed matter by a predetermined angle (θ) about the z-axis. In this embodiment, the predetermined angle (θ) is 90 degrees, but other angles may be used if necessary.

Hereinafter, the printing process for a three-dimensional printed matter including such a process will be described.

First, the ink is basically transferred from the transfer unit 300 to the roll 100 in the same manner, but unlike the conventional embodiment, the printed matter rotates at a predetermined angle (θ, 90 degrees) about the z-axis. Therefore, it is necessary to use the same ink twice. That is, in order to use the four colors in the printed matter, in the third embodiment, two (I, I') per ink type (I) must be applied to eight transfer plates. Then, the eight transfer plates are transferred with the roll 100. Alternatively, four transfer plates may be used and two patterns may be engraved on them. In the following, for the sake of simplicity, eight transcription versions are described.

The roll approaches the printed matter and the first printing (I1) of the first ink portion is performed. The subsequent process is the same as in FIG. 14, after the printed matter is vertically lowered by the printing plate support height adjusting unit 450, the printed matter moves horizontally by L + Δ + ε in the first direction, and then moves vertically again to perform the next printing. prepare. At this time, the printed matter rotates about the z-axis by a predetermined angle (θ, 90 degrees). After that, the second printing (I1') of the first ink portion is performed.

By printing one type of ink on the printed matter through such a process and then reprinting the same ink by rotating the printed matter horizontally by 90 degrees, it is possible to easily print on the above-mentioned difficult-to-print surfaces 410c and 410d. ..

What is important here is that since printing of the same color is performed, there is no need for a drying process of applying UV light or the like until the printing of the same color is completed.

After that, for printing the second ink, the printed matter is moved in the first direction by L + Δ + ε and rotated by a predetermined angle (θ, 90 degrees) around the z-axis, or the pattern of the plate is printed. Reversed to the order of the first color, printing of the second ink is started with the current angle θ, and the first printing (I2) of the second ink portion is executed to save the printing time. After that, the printed matter moves by L + Δ + ε in the first direction and rotates by a predetermined angle (θ, 90 degrees) about the z-axis in the same manner as the first ink part, and then the second ink part. Perform the second print (I2') of. In the same manner below, multicolor printing is applied to the entire surface of the three-dimensional object, and the drying process is performed in only one roll.

Since this printing method can be performed with one rotation of the roll, if there is no problem with the parallelism with the roll movement direction of the linear slider, control software, etc., the main printing can be performed with high accuracy and high reproducibility. It will be possible.

Claims (7)

A cylindrical blanket roll that moves horizontally in the first direction while rotating,
A gravure offset printing apparatus that includes two or more ink transfer plates that are in contact with the lower end of the blanket roll and are coated with inks of different colors.
A blade that moves in a second direction orthogonal to the first direction with one end in contact with the ink transfer plate is included so that the inks of different colors are not mixed with each other during squeezing.
The ink on two or more transfer plates is transferred to the surface of the blanket roll while the blanket roll makes one rotation and moves in the first direction.
Two or more inks transferred to the surface of the blanket roll are overprinted on the same target point on the printed matter located in front of the blanket roll to perform multicolor printing .
After printing the first ink part on the printed matter
After the printed matter moves in one direction in the first direction, the blanket roll moves in one direction in the first direction as it rotates while rotating without moving up and down in order to overprint the second ink portion. A featured gravure offset printing device. The gravure offset printing apparatus according to claim 1 , wherein the distance that the printed matter moves in one direction in the first direction is the same as the distance that the blanket roll moves in one direction while rotating. The distance that the printed matter has moved in one direction in the first direction and the distance that the blanket roll has moved in one direction while rotating are the distances.
2πr / N = L + Δ + ε ,
Where N is the number of transfer plates,
L is the length of the transfer plate in the first direction,
Δ is the distance between the transfer plates in the first direction,
ε is characterized by dividing δ, which is a minute correction amount due to a change in the length of the radius (Nip) generated by the elastic roller in contact with the transfer plate and the printed matter, into N. The gravure offset printing apparatus according to claim 2. Each ink transfer plate has a predetermined interval (Δ) in the first direction and is arranged.
The length of the outer circumference of the blanket roll is
The gravure offset according to claim 1 , wherein the length is equal to or greater than the sum of the length of each ink transfer plate in the first direction and the length of the first direction of a predetermined interval between the ink transfer plates. Printing device. The length of the outer circumference of the blanket roll is

And
here,
N is the number of transfer plates,
Li is the length of the i-th transfer plate in the first direction,
Δj is the spacing between the first-way plates between the j-th transfer plates and the subsequent transfer plates,
δ means a minute correction amount due to a change in the length of the radius (Nip) generated when the elastic roller is in contact with the transfer plate and the printed matter, respectively, and the gravure offset printing according to claim 4. apparatus. The hardness of the blanket roll is JIS-A standard 40 degrees or less and exceeds 0 degrees.
The gravure offset printing apparatus according to claim 1 , wherein the roll rotation speed of the blanket roll and the horizontal movement speed in the first direction are 0.5 m / min or more and 12 m / min or less on the transfer plate. The gravure offset printing apparatus according to claim 1 , wherein the start ink line and the residual ink line do not enter the first direction movement range of the blanket roll.

Images