WO2017199344A1 - 印刷用ブランケット - Google Patents
印刷用ブランケット Download PDFInfo
- Publication number
- WO2017199344A1 WO2017199344A1 PCT/JP2016/064635 JP2016064635W WO2017199344A1 WO 2017199344 A1 WO2017199344 A1 WO 2017199344A1 JP 2016064635 W JP2016064635 W JP 2016064635W WO 2017199344 A1 WO2017199344 A1 WO 2017199344A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- printing
- blanket
- outer layer
- printing surface
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
- B41N10/02—Blanket structure
- B41N10/04—Blanket structure multi-layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
- B41F17/001—Pad printing apparatus or machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
- B41N2210/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
- B41N2210/04—Intermediate layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
- B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds
Definitions
- the present invention relates to a blanket for printing used for blanket printing in which ink transferred from a printing original plate is transferred to a printing surface.
- a printing surface of a printing blanket is pressed against a printing original plate, and ink arranged according to a printing pattern on the printing original plate is transferred to the printing blanket. Thereafter, the printing surface of the printing blanket to which the ink has been transferred is pressed against the surface to be printed, and the transferred ink is transferred to the surface to be printed, thereby printing a printing pattern on the surface to be printed.
- the printing blanket is an elastic body such as silicon rubber mixed with silicon oil having elasticity (flexibility), and has a substantially hemispherical shape, a bullet shape, or a substantially semi-cylindrical shape having a bullet-like cross section. Is formed. Then, the printing surface of the elastic body is pressed against the flat printing original plate, and after the ink is transferred from the printing original plate to the printing surface, the printing surface is pressed against the surface to be printed having a curved shape or unevenness from the printing surface. Ink is transferred to the surface to be printed.
- an elastic body such as silicon rubber mixed with silicon oil having elasticity (flexibility)
- the printing surface of the elastic body is pressed against the flat printing original plate, and after the ink is transferred from the printing original plate to the printing surface, the printing surface is pressed against the surface to be printed having a curved shape or unevenness from the printing surface. Ink is transferred to the surface to be printed.
- Patent Document 1 ink is placed on a small printing original plate corresponding to each small printing surface along a small development pattern on the corresponding small printing surface. Then, the small printing blankets corresponding to the respective small printing surfaces are pressed against the corresponding small printing original plates, and the ink is transferred to the respective small printing blankets. Further, the small printing blanket is pressed against the corresponding small printing surface, and a small pattern is printed there. Then, the plurality of small printing blankets are pressed against the corresponding small printing original plates, the ink is transferred to the respective small printing blankets, and the plurality of small printing blankets are respectively transferred to the corresponding small printing surfaces. And printing the small picture on the small print surface to enable printing on a complex-shaped print medium.
- Patent Document 1 since printing is performed by pressing a plurality of small printing blankets against a substrate having a complicated shape, adjacent small printing surfaces are at the boundary. There was a problem that the inks overlapped or gaps occurred, affecting the quality of the printed image. In addition, since a plurality of small printing blankets are required to print on a single substrate, the printing process takes time, and a plurality of small printing blankets need to be cleaned and repaired. There was a problem of increasing.
- the present invention has been made to solve the above-described problems, and provides a printing blanket capable of printing on a substrate having a complicated shape and reducing the printing cost.
- a printing blanket according to the present invention is located on a surface, a printing original plate on which ink is placed, a printing surface pressed against a printing surface to be printed, and the printing surface on the printing original plate or the printing surface.
- An inner layer to which a pressing force is applied when pressed, and an outer layer provided in contact with the inner layer on the side where the printing surface is disposed, the outer layer being more than the inner layer Asker C hardness is small.
- the printing surface of the printing blanket can easily follow even if the printing surface has a complicated shape. Therefore, even if the printing surface has a complicated shape, the entire printing surface can be printed with one printing bracket. As a result, the quality of the printed image can be ensured and the cost for printing can be suppressed.
- Embodiment 1 a printing blanket according to the present invention will be described with reference to the drawings.
- the present invention is not limited to the embodiments described below.
- symbol is attached
- Each drawing is schematically drawn, and the present invention is not limited to the illustrated shape (in particular, the thickness of the sheet is exaggerated).
- the elastic body or elasticity is not limited to a linear relationship between the load applied to the elastic body and the amount of deformation caused by the load, and is a non-linear relationship, When the applied load is removed, it includes one that returns to its original shape immediately or after a predetermined time delay.
- FIG. 1 is a cross-sectional view of a printing blanket 10 according to Embodiment 1 of the present invention.
- FIG. 2 is an explanatory diagram of printing by the printing blanket 10 according to the first embodiment of the present invention.
- the printing blanket 10 shown in FIG. 1 includes a substantially hemispherical elastic body. As shown in FIG. 2, the printing blanket 10 is pressed against the printing original plate 16 on which the ink 17 is placed, and the ink 17 is transferred to the printing surface 13 on the elastic body surface. By directly pressing the printing surface 13 against the printing surface 18 of the printing object, the ink 17 is transferred to the printing surface and printing is performed.
- the printing blanket 10 When the printing blanket 10 has a substantially hemispherical flat surface as the bottom surface 4, the distance from the center of the bottom surface 4 to the vertex 11 is longer than a normal hemisphere having the bottom surface 4 of the same size. That is, the printing blanket 10 is shaped like a shell.
- the shape of the printing blanket 10 is not limited to this. For example, a hemisphere, a curved surface formed by rotating a parabola around its axis of symmetry, a part of an ellipsoid cut, a shell shape or a semicircular shape.
- the shape can be appropriately changed according to the specification of the printing surface 18 such as a shape continuously extended on a straight line.
- a predetermined range around the vertex 11 of the surface of the printing blanket 10 is the printing surface 13 that transfers the ink 17 from the printing original plate 16 and transfers it to the printing surface 18.
- FIG. 1 shows a cross section passing through the vertex 11 of the printing blanket 10 and perpendicular to the bottom surface 4.
- the printing blanket 10 includes an inner layer 1, an outer layer 2 attached along the curved surface of the inner layer 1, and a protective film attached to the outer surface of the outer layer 2.
- Layer 3 Note that the printing blanket 10 is not limited to the three-layer structure as shown in FIG. 1, and may be composed of more layers. Further, the printing blanket 10 may have a two-layer structure of the inner layer 1 and the outer layer 2 without the protective coating layer 3.
- the inner layer 1 is formed by molding silicon rubber, for example.
- the inner layer 1 is provided with elasticity (flexibility), and silicon oil is mixed to facilitate deformation.
- the inner layer 1 has a shell shape like the printing blanket 10, but the shape can be appropriately changed according to the specifications of the printing surface 18.
- the inner layer 1 is deformed when pressed against the printing original plate 16 shown in FIG. 2, and the printing surface 13 contacts the printing original plate 16.
- the ink 17 corresponding to the printing pattern applied to the printing original plate 16 can be transferred to the printing surface 13 and pressed against the printing surface 18 shown in FIG.
- the material (substance) is not limited as long as the transferred ink 17 can be transferred to the printing surface 18.
- the outer layer 2 is composed of a sheet-like silicon rubber having a predetermined thickness (for example, 5 mm).
- the outer layer 2 is affixed to at least a part of the surface of the inner layer 1 and is located inside the printing surface 13 of the printing blanket 10.
- the outer layer 2 is deformed when the printing blanket 10 is pressed against the printing original plate 16 and the printing surface 18 so that the printing surface 13 follows and closely contacts the printing original plate 16 and the printing surface 18. belongs to.
- the outer layer 2 is made of silicon rubber having a lower hardness than the silicon rubber constituting the inner layer 1 and the protective coating layer 3.
- the hardness of the outer layer 2 is set in the range of 50 to 70 points in Asker C hardness.
- the Asker C hardness of the material of the inner layer 1 and the protective coating layer 3 is not limited to 100 points, and the hardness can be selected as appropriate.
- the Asker C hardness of the inner layer 1 is set to 80 points
- the Asker C hardness of the material constituting the outer layer 2 is set in the range of 40 to 56 points.
- the outer layer 2 is made of a sheet-like material thicker than the protective coating layer 3.
- the thickness of the outer layer 2 can be appropriately set according to the shape of the printing surface 18, particularly the height of the unevenness formed on the printing surface 18.
- the thickness of the outer layer 2 is preferably at least twice the height of the unevenness formed on the printing surface 18.
- the material of the outer layer 2 is not limited to silicon rubber, and can be deformed when pressed against the printing original plate 16 to press the printing surface 13 against the printing original plate 16 and pressed against the printing surface 18. It is sufficient that the printing surface 13 can be brought into close contact with the printing surface 18 along the shape of the printing surface 18. Further, in the step of attaching the outer layer 2 to the inner layer 1, it is desirable that the outer layer 2 has sufficient elasticity so that it can be attached along the surface of the inner layer 1.
- the outer layer 2 is not limited to a sheet-like material, and may be a molded product formed by a mold, for example. Also in this case, the outer layer 2 is formed to be thicker than the protective coating layer 3 particularly in the portion corresponding to the printing surface 13. Further, the thickness of the outer layer 2 may be uniform over the entire range as shown in FIG. 1 or may be a non-uniform shape such as a part of which is thin.
- the outer layer 2 may be composed of a plurality of layers. If comprised in this way, when a sheet-like material is used for the outer layer 2, the thickness of the outer layer 2 can be easily changed by stacking the sheet-like material on the surface of the inner layer 1 Can do. Even when the height of the unevenness of the printing surface 18 is different, it is not necessary to prepare many kinds of sheet materials having different thicknesses, and the thickness of the outer layer 2 can be adjusted by overlapping the sheet materials. it can.
- the printing blanket 10 can be used repeatedly by peeling the outer layer 2 and the protective coating layer 3 from the inner layer 1 and attaching the new outer layer 2 and the protective coating layer 3 to the inner layer 1. The cost for the printing blanket 10 can be reduced.
- the outer layer 2 is attached to the inner layer 1 with, for example, an adhesive.
- the protective coating layer 3 constitutes the outer surface of the printing blanket 10, and is formed by adhering, for example, a 0.5 mm silicon rubber sheet to the surface of the outer layer 2.
- the protective coating layer 3 prevents the silicone oil contained in the soft silicone rubber inside from oozing out on the printing surface 13. Further, since the outer surface of the protective coating layer 3 constitutes the printing surface 13 and is repeatedly pressed against the printing original plate 16 and the printing surface 18, durability against scratches and abrasion is required. Therefore, the protective coating layer 3 uses a material having a higher hardness than the outer layer 2 and is thin so as to follow the printing surface 18 when the printing surface 13 is pressed against the printing surface 18. .
- the thickness of the printing surface 13 is configured to be as thin as possible, and may be configured in a range of, for example, 0.1 mm to 1 mm.
- the material of the protective coating layer 3 is not limited to silicon rubber, and any material can be selected as long as it follows the deformation of the inner layer 1. Further, in the step of attaching the protective coating layer 3 to the inner layer 1, it is desirable that the protective coating layer 3 has sufficient stretchability so that it can be attached along the surface of the inner layer 1.
- the printing blanket 10 may be configured by omitting the protective coating layer 3.
- the printing blanket 10 since the printing blanket 10 has the soft outer layer 2 exposed, the strength and durability are lower than that of the printing blanket 10 having the protective coating layer 3, and the bleeding of silicon oil increases. This is a disadvantage.
- printing can be performed in the same manner as the printing blanket 10 having the protective coating layer 3.
- the ink 17 is disposed on the printing original plate 16.
- a plurality of inks 17 are arranged to form a predetermined print image.
- the ink 17 is disposed on the printing original plate 16 by, for example, an intaglio plate, a relief plate, or an ink jet.
- the printing blanket 10 is pressed against the printing original plate 16 from the vertex 11 and deformed, and a predetermined area centered on the vertex 11 is pressed against the surface of the printing original plate 16.
- the predetermined area is referred to as a printing surface 13.
- the ink 17 on the printing original plate 16 adheres to the printing surface 13 of the printing blanket 10 and is transferred.
- the outer layer 2 is easily deformed because it is made of silicon rubber containing a large amount of silicon oil.
- the protective coating layer 3 attached to the surface of the inner layer 1 is made of, for example, silicon rubber having a hardness higher than that of the outer layer 2.
- the printing surface 13 may be wetted by applying a solvent. By performing this process, the ink 17 is easily transferred to the printing surface 13.
- the printing blanket 10 is configured to be easily deformed, the printing blanket 10 is easy to follow a curved surface to be printed and has good familiarity.
- the protective coating layer 3 is formed of silicon rubber having a higher hardness than the outer layer 2, and the protective coating layer 3 has a smaller amount of silicon oil mixed therein. Therefore, when the printing blanket 10 is deformed, the silicone oil mixed in the outer layer 2 is substantially sealed by the protective coating layer 3 surrounding the silicone oil.
- the amount of silicon oil mixed in the protective coating layer 3 is small, the silicone oil is difficult to ooze out on the printing surface 13 constituted by the protective coating layer 3. Thereby, the printing surface 13 is in a state where silicon oil is appropriately attached, and when the printing surface 13 is pressed against the printing surface 18, the ink 17 hardly remains on the printing surface 13 and is easily transferred to the printing surface 18. .
- FIG. 3 is a cross-sectional view showing a state where the printing blanket 10 according to the first embodiment of the present invention is pressed against the printing surface 18.
- FIG. 4 is an enlarged view of a portion A in FIG.
- FIG. 5 is a cross-sectional view of a state in which a printing blanket 110 that is not provided with the outer layer 2 and the protective coating layer 3 as a comparative example is pressed against the printing surface 18.
- FIG. 6 is an enlarged view of a portion B in FIG.
- the printed surface 18 of the printed material 20 has an uneven shape on the surface.
- two protrusions 19 having a rectangular cross section are provided.
- the present invention is not limited to this shape.
- the cross section is a semi-circular, triangular, or wavy shape having a general wavy shape. There may be.
- the printing surface 13 is in close contact with all of the upper surface 18 a, the corner portion 18 b, the side surface 18 e, the corner portion 18 c, and the flat surface portion 18 d of the printing surface 18. ing. As a result, the ink 17 attached to the printing surface 13 is transferred to the entire surface of the printing surface 18 including the protrusions 19.
- printing is performed with a printing blanket 110 composed only of the inner layer 101. Without creating a space.
- the printing surface 13 is less likely to be in close contact with the side surface 18e and the corner 18c of the protrusion 19.
- the printing blanket 10 is pressed against the printing surface 18 from substantially vertically above, and a pressing force (arrow 30 and arrow 31 in FIG. 6) is applied.
- the pressing force is applied to the inner layer 101 of the printing blanket 10 from, for example, a printing apparatus (not shown) to which the printing blanket 10 is attached.
- a force (a force generated in the directions of arrows 31 and 37 in FIG. 6) generated by deformation in a substantially parallel direction works. Since the inner layer 101 is formed of a single member, each part has a uniform hardness, and the force concentrates only on the part with large deformation as shown by the arrow 30 in FIG. Is difficult to apply force. Therefore, in the portion where the deformation of the inner layer 101 is small, the force (force acting in the direction of the arrow 31 in FIG. 6) generated by the deformation in the direction substantially parallel to the printing surface 18 is also small.
- the force which presses the printing surface 13 against the side surface 18e and the corner 18c becomes small. Therefore, as shown in FIG. 6, a gap is formed between the side surface 18 e and the corner portion 18 c between the printing surface 13 and the ink 17 is hardly transferred.
- size of the arrow 30, 31, 32, 37 shown in FIG. 6 represents the magnitude
- the printing blanket 10 has the inner layer 1 made of a relatively hard material and the outer layer 2 made of a soft material, and is bonded at a boundary 12. Therefore, as shown in FIG. 4, the deformation amount of the outer layer 2 is large around the protrusion 19, and the deformation amount of the inner layer 1 is small. Then, the pressing force for pressing the printing blanket 10 against the printing surface 18 is transmitted to each part of the outer layer 2 through the inner layer 1 on an average as shown by arrows 33 and 34 in FIG. That is, the outer layer 2 is applied with an average force over the entire printing surface 13 as compared with the conventional technique.
- the printing blanket 10 when the printing blanket 10 is pressed and deformed in a substantially vertical direction against the printing surface 18, the printing blanket 10 is deformed in a substantially parallel direction of the printing surface 18, and a force generated by the deformation in the substantially parallel direction (in FIG. 4).
- the force acting in the direction of the arrows 35 and 36 is also average. Therefore, in the printing blanket 10 according to the first embodiment, the force pressing the printing surface 13 against the side surface 18e and the corner portion 18c is larger than that in the prior art shown in FIG.
- the protective coating layer 3 provided with the printing surface 13 is affixed on the outer surface of the outer layer 2 in order to ensure the durability of the printing blanket 10 and to suppress the bleeding of the internal silicon oil.
- the protective coating layer 3 is made of a material having a higher hardness than the outer layer 2, but is easy to follow the deformation of the outer layer 2 because it is thin. That is, the effect of the protective coating layer 3 is reduced when printing on the printing surface 18 having the projections 19 as shown in FIG.
- FIG. The printing blanket 210 according to the second embodiment of the present invention is obtained by changing the configuration of the inner layer 1 and the outer layer 2 with respect to the printing blanket 10 according to the first embodiment.
- the printing blanket 210 according to the second embodiment will be described with a focus on changes from the first embodiment.
- components having the same function in each drawing are displayed with the same reference numerals as those used in the description of the first embodiment.
- FIG. 7 is a cross-sectional view of a printing blanket 210 according to Embodiment 2 of the present invention.
- FIG. 8 is a cross-sectional view of a state in which the printing blanket 210 according to the second embodiment of the present invention is pressed against the printing surface 18.
- the inner layer 201 of the printing blanket 210 is only the upper part of the inner layer 1 according to the first embodiment, and is formed by molding, for example, ABS resin or the like. That is, the inner layer 201 is made of a material having higher rigidity than the inner layer 1 of the first embodiment.
- the material of the inner layer 201 is not limited to ABS resin, and other materials such as resin and metal may be used as long as the amount of deformation is small with respect to the force applied during printing.
- the outer layer 202b is provided in contact with the printing surface side of the inner layer 201 of the printing blanket 210.
- the outer layer 202b is formed by molding silicon rubber, for example.
- the outer layer 202b is given elasticity (flexibility), and silicon oil is mixed for easy deformation.
- the outer layer 202a is affixed on the surface of the outer layer 202b formed in a cannonball shape.
- the outer layer 202b is given elasticity in the same manner as the outer layer 202a.
- the hardness of the outer layer 202a and the outer layer 202b may be the same or different.
- the outer layer 202b is made of the same material as the inner layer 1 in the first embodiment
- the outer layer 202a is made of the same material as the outer layer 2 in the first embodiment.
- the protective coating layer 3 is attached to the surface on the printing surface 13 side of the outer layer 202a, that is, the outer surface, similarly to the printing blanket 210 of the first embodiment. Also in the second embodiment, the printing blanket 210 may be configured such that the protective coating layer 3 is omitted.
- the inner layer 201 includes a molding surface 205 on a surface in contact with the outer layer 202b located on the printing surface 13 side.
- the molding surface 205 has a shape that approximates a shape obtained by transferring irregularities such as the protrusions 19 provided on the printing surface 18.
- a recess 206 is disposed on the molding surface 205 above the printing surface 13 that contacts the protrusion 19 of the printing surface 18. Therefore, in a state where the printing surface 13 is pressed against the printing surface 18 at the time of printing, the distance h1 from the upper surface 18a of the projection 19 installed on the printing surface 18 to the molding surface 205 directly above the upper surface 18a is a plane portion.
- the thickness of the silicone rubber above the printing surface 13 in the portion that comes into contact with the protrusion 19 becomes thinner than the other portions.
- the force with which the printing surface 13 pushes the protrusion 19 increases.
- the printing blanket 210 is printed when pressed against the printing surface 18 as compared with the case where the molding surface 205 does not have the recess 206.
- the force transmitted from the surface 13 to the protrusion 19 is reduced. This is because, as shown in FIG. 8, the thickness of the silicon rubber above the portion of the printing surface 13 in contact with the protrusion 19 is thick.
- the force with which the printing blanket 210 presses the printing surface 18 becomes average at each portion of the printing surface 18.
- the outer layer 2 made of a soft material is also applied with a force from the inner layer 201 substantially evenly. It tends to be larger than
- a part of the molding surface 205 located on the outer peripheral side may be inclined toward the printing surface 13 as it goes to the outer periphery.
- the outer peripheral molding surface 205 may be configured such that the distance from the printing surface 18 becomes closer toward the outer periphery.
- a portion of the molding surface 205 on the outer peripheral side of the inner layer 201 is referred to as an outer peripheral molding surface 207.
- a portion of the molding surface 205 located inside the inner layer 201 is referred to as an inner molding surface 208.
- the relationship between the distance h3 and the distance h4 between the outer circumferential side molding surface 207 and the printing surface 18 is such that the distance h3 located on the inner side is located on the outer circumferential side.
- the distance h4 is set to be larger than the distance h4.
- the outer peripheral side molding surface 207 is configured in this way, the outer layer 202b is prevented from being deformed to bulge outward when pressed against the printing surface 18, so that a force is applied to the outer layer 202b. It can be transmitted to each part of the layer 202a substantially evenly. That is, when the outer layer 202b is pressed against the printing surface 18, the outer layer 202b is deformed so as to swell in the direction of the arrow 230 in FIG. 8, but the outer peripheral molding surface 207 is formed so as to suppress this deformation. The force with which 210 presses the printing surface 18 is difficult to disperse.
- the outer layer 202a made of a soft material is also applied with a force substantially uniformly from the outer layer 202b. Therefore, the force pressing the printing surface 13 against the side surface 18e and the corner 18c of the protrusion 19 is also the same as in the first embodiment. Compared with, it tends to be larger.
- the outer peripheral side molding surface 207 has a cross section represented by a straight line, but may be a curved surface in which the cross section becomes a curve such as an arc.
- the inner molding surface 208 also has a straight section, but this portion may also be formed so as to approach the printing surface 18 from the center of the inner layer 201 toward the outer periphery.
- FIG. 9 and 10 are cross-sectional views showing modifications of the printing blanket 210 according to the second embodiment.
- the printing blanket 210 a shown in FIG. 9 does not have the outer layer 202 a of the printing blanket 210.
- the printing blanket 210b shown in FIG. 10 has a configuration in which the protective coating layer 3 is further eliminated from the printing blanket 210a. Even in such a configuration, printing similar to that of the printing blanket 210 can be performed by appropriately changing the hardness of the outer layer 202b and appropriately changing the thickness and other dimensions.
- the printing blankets 10, 210, 210a, and 210b according to the first or second embodiment are positioned on the surface, and are pressed against the printing original plate 16 on which the ink 17 is placed and the printing target surface 18 to be printed.
- outer layers 2 and 202 provided.
- the outer layers 2 and 202 have lower Asker C hardness than the inner layers 1 and 201. With this configuration, the deformation amount of the inner layers 1, 201 is small, and an average force can be applied to the outer layers 2, 202 over the entire printing surface 18.
- the printing surface 18 can contact the entire surface of the printing surface 18. That is, even if the printing surface 18 has a complicated shape, the printing surface 13 can easily follow, and even if the printing surface 13 such as the side surface 18e and the corner 18c of the protrusion 19 is difficult to press, the ink 17 can be removed. No printing is possible. Further, since the printing surface 18 can be printed by pressing the printing blanket 10, 210, 210a, 210b once, there is no joint for each printing region over the entire printing surface 18, and the printing process can be reduced. .
- the inner layer 201 has a shape that approximates the shape in which the shape of the printing surface 18 is transferred to the surface that contacts the outer layer 202b.
- a molding surface 205 is provided.
- the molding surface 205 includes an outer peripheral molding surface 207 that is located on the outer peripheral side of the molding surface 205.
- the outer peripheral side molding surface 207 is formed so that the distance from the printing surface 18 becomes smaller toward the outer circumferential side in a state where the printing surface 13 is pressed against the printing surface 18.
- the force applied to the printing surface 18 from the printing blanket 210 is not dispersed and is applied to the entire area of the printing surface 18 on an average, so that the covering having a more complicated shape than the configuration (2) above. Even with the printed surface 18, the effect described in the above (1) can be obtained.
- the outer layer 2 has an Asker C hardness value of 50% with respect to the Asker C hardness value of the inner layers 1 and 201. It is comprised with the material of 70% or less of range. With this configuration, the difference in ease of deformation between the outer layer 2 and the inner layers 1 and 201 becomes clear, and the effects described in the above (1) to (3) can be obtained more reliably. it can.
- the outer layer 2 has a thickness that is twice or more the height of the protrusion 19 formed on the printing surface 18. It is. With this configuration, even if the height of the protrusion 19 formed on the printing surface 18 is changed, the thickness of the outer layer 2 is changed, so that the above (1) to (4) are described. An effect can be obtained.
- the protective coating layer 3 is further provided on the printing surface 13 side of the outer layer 2.
- the printing blankets 10, 210, 210 a maintain the durability of the printing surface 13 by the protective coating layer 3, and suppress the bleeding of silicon oil or the like from the outer layer 2. Can do.
- the protective coating layer 3 has a thickness of 0.1 mm to 1 mm.
- the durability of the printing surface 13 can be maintained by the protective coating layer 3 and bleeding of silicon oil or the like from the outer layer 2 can be suppressed.
- the protective coating layer 3 is made of a material having high hardness, it does not hinder the deformation of the outer layer 2, and is described in the above (1) to (6). Effects can be obtained.
- the outer layer 2 may be configured by stacking a plurality of sheet-like materials. By being configured in this manner, it is possible to adjust the thickness of the outer layer 2 by overlapping a predetermined sheet-like material, so that even if the height of the projection 19 formed on the printing surface 18 changes, It is not necessary to procure sheet materials with different thicknesses. Thereby, the outer layer 2 can be configured at low cost.
- the outer layer 2 is silicon rubber containing silicon oil.
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Abstract
Description
以下、本発明に係る印刷用ブランケットについて、図面を参照しながら説明する。なお、以下に説明する実施の形態によって本発明が限定されるものではない。また、各図において同じ部分には同じ符号を付し、一部の説明を省略する。また、各図は模式的に描かれたものであって、本発明は図示された形状に限定されるものではない(特に、シートについては厚さを誇張している)。また、本明細書において、弾性体または弾性とは、これに加わる荷重と該荷重によって生じる変形量とが直線的な関係にあるものに限定するものではなく、非直線的な関係であって、加わっていた荷重が除かれた場合に、即時または所定の時間遅れの後に、元の形状に戻るものを含んでいる。
図1は、本発明の実施の形態1に係る印刷用ブランケット10の断面図である。図2は、本発明の実施の形態1に係る印刷用ブランケット10による印刷の説明図である。図1に示された印刷用ブランケット10は、略半球形状の弾性体を備える。図2に示されるように、印刷用ブランケット10は、インキ17が置かれた印刷原版16に押し付けられ、インキ17を弾性体表面の印刷面13に移し取る。そのまま印刷面13を印刷対象物の被印刷面18に押し付けることによりインキ17を被印刷面に転写し、印刷を行うものである。
内部層1は、例えばシリコンゴムを成形して構成される。内部層1は、弾性(可撓性)が付与され、変形しやすくするためにシリコンオイルが混合されている。実施の形態1においては、内部層1は、印刷用ブランケット10と同じように、砲弾形状になっているが、被印刷面18の仕様に応じて適宜形状を変更することができる。なお、内部層1は、図2に示されている印刷原版16に押し付けられた際に変形し、印刷面13が印刷原版16に接触する。内部層1が変形することにより、印刷原版16に塗布された印刷パターンに対応したインキ17を印刷面13に移し取ることができ、図2に示されている被印刷面18に押し付けられた際、移し取ったインキ17を被印刷面18に移し渡すことができるものであれば、その材料(物質)を限定するものではない。
外部層2は、所定の厚さ(例えば、5mm)のシート状のシリコンゴムから構成される。外部層2は、内部層1の表面の少なくとも一部に貼り付けられ、印刷用ブランケット10の印刷面13の内部に位置する。外部層2は、印刷原版16及び被印刷面18に印刷用ブランケット10が押し付けられた際に変形して、印刷面13が印刷原版16及び被印刷面18に追従して密着するようにするためのものである。
保護被膜層3は、印刷用ブランケット10の外側の面を構成し、例えば0.5mmのシリコンゴムのシートを外部層2の表面に貼り付けて構成される。保護被膜層3は、内部の軟らかいシリコンゴムに含まれたシリコンオイルが印刷面13に滲み出ないようにするものである。また、保護被膜層3の外側の表面は、印刷面13を構成するため、印刷原版16及び被印刷面18に繰り返し押し付けられるため、傷、摩耗に対する耐久性が必要となる。そのため、保護被膜層3は、外部層2に対し硬度が高い材料を使用し、かつ、印刷面13が被印刷面18に押し付けられた際に被印刷面18に追従するように薄くなっている。実施の形態1においては、印刷面13の厚さは、可能な範囲で薄く構成されており、例えば0.1mm~1mmの範囲で構成されていると良い。なお、保護被膜層3の材質についてはシリコンゴムのみに限定するものでは無く、内部層1の変形に追従するものであれば、材質は適宜選択することができる。また、保護被膜層3を内部層1に貼り付ける工程において、内部層1の表面に沿って貼り付けられるように、十分な伸縮性を有していることが望ましい。
実施の形態1においては、一例として砲弾状の印刷用ブランケット10による印刷を説明する。
図3は、本発明の実施の形態1に係る印刷用ブランケット10を被印刷面18に押し付けた状態の断面図である。図4は、図3のA部の拡大図である。図5は、比較例としての外部層2及び保護被膜層3が設けられていない印刷用ブランケット110を被印刷面18に押し付けた状態の断面図である。図6は、図5のB部の拡大図である。
印刷物20の被印刷面18は、表面に凹凸形状を備えている。実施の形態1においては断面が矩形の突起19が2箇所設置されているが、この形状に限られず、例えば断面が半円形、三角形、全体的にうねりのある波形状等の被印刷面18であっても良い。また、図3及び図4に示されているように、印刷面13は、突起19の上面18a、角部18b、側面18e、隅部18c、被印刷面18の平面部18dの全てに密着している。これにより、印刷面13に付いていたインキ17は、突起19を含めた被印刷面18の全面に転写される。
本発明の実施の形態2に係る印刷用ブランケット210は、実施の形態1に係る印刷用ブランケット10に対し、内部層1および外部層2の構成を変更したものである。実施の形態2に係る印刷用ブランケット210においては、実施の形態1に対する変更点を中心に説明する。実施の形態2に係る印刷用ブランケット210の各部については、各図面において同一の機能を有するものは実施の形態1の説明で使用した図面と同一の符号を付して表示するものとする。
図7は、本発明の実施の形態2に係る印刷用ブランケット210の断面図である。図8は、本発明の実施の形態2に係る印刷用ブランケット210を被印刷面18に押し付けた状態の断面図である。
図7に示される様に、印刷用ブランケット210の内部層201は、実施の形態1に係る内部層1の上側の部分のみであり、例えばABS樹脂等を成形して構成されている。つまり、内部層201は、実施の形態1の内部層1と比較して剛性が高い材質で構成されている。なお、内部層201の材質は、ABS樹脂に限定されず、印刷時にかかる力に対して変形量が微小であれば、樹脂や金属等の他の材質を使用しても良い。
また、内部層201は、印刷面13側に位置する外部層202bと接する面に成形面205を備える。成形面205は、被印刷面18に設けられた突起19等の凹凸を転写した形状に近似した形状になっている。例えば、実施の形態2においては、被印刷面18の突起19と接触する印刷面13の上方の成形面205には、凹部206が配置されている。よって、印刷時に印刷面13を被印刷面18に押し付けた状態において、被印刷面18に設置されている突起19の上面18aから上面18aの真上の成形面205までの距離h1は、平面部18dから平面部18dの真上の成形面205までの距離h2と略同じになっている。つまり、印刷面13が被印刷面18に押し付けられていない状態では、突起19と接触する部分の印刷面13の上方のシリコンゴムの厚さがその他の部分よりも厚くなる。
図9に示される印刷用ブランケット210aは、印刷用ブランケット210の外部層202aが無い。図10に示される印刷用ブランケット210bは、印刷用ブランケット210aに対しさらに保護被膜層3を無くした構成である。このような構成であっても、外部層202bの硬度を適宜変更したり、厚さ等の寸法を適宜変更することにより印刷用ブランケット210と同様な印刷が可能である。
(1)実施の形態1又は2の印刷用ブランケット10、210、210a、210bは、表面に位置し、インキ17が置かれた印刷原版16及び印刷する対象である被印刷面18に押し付けられる印刷面13と、印刷面13が印刷原版16又は被印刷面18に押し付けられる際の押し付け力が加えられる内部層1、201と、印刷面13が配置されている側に内部層1、201に接して設けられている外部層2、202と、を備える。外部層2、202は、内部層1、201よりもアスカーC硬度が小さい。
このように構成することにより、内部層1、201の変形量が少なく、外部層2、202に対し被印刷面18の全域にわたって平均的に力を加えることができる。これにより、外部層2、202の各部に平均的な力を加えることができる。従って、突起19のように被印刷面18を押す力が集中しやすい部位があっても、その力が分散するため、外部層2、202が被印刷面18に追従しやすい。よって、被印刷面18に突起19がある場合でも、印刷面13は、被印刷面18の全面に接触することができる。つまり、被印刷面18が複雑形状であっても、印刷面13が追従しやすく、突起19の側面18e及び隅部18cなどの印刷面13を押し付けにくい部位であっても、インキ17の抜けの無い印刷が可能となる。また、印刷用ブランケット10、210、210a、210bを1回押し付けることにより被印刷面18を印刷できるため、被印刷面18全域にわたって各印刷領域ごとのつなぎ目がなく、印刷工程も少なくすることができる。
このように構成することで、印刷用ブランケット210が被印刷面18に押し付けられたときに、被印刷面18を押す力を被印刷面18の各部に平均的にかけることができる。よって、外部層2にも平均的に力がかかり、外部層2が各部において略均等に変形するため、例えば突起19がより大きい場合や、複雑な形状の被印刷面18であっても、上記(1)で述べた効果を得ることができる。
このように構成することにより、印刷面13を被印刷面18に押し付けた状態において、内部層201が外周側に膨らむように変形するのを抑えることができる。これにより、印刷用ブランケット210から被印刷面18にかかる力が分散せず、かつ、被印刷面18の全域に平均的にかかるため、上記(2)の構成よりもさらに、複雑な形状の被印刷面18であっても、上記(1)で述べた効果を得ることができる。
このように構成されることにより、外部層2と内部層1、201との変形しやすさの差が明確になり、上記(1)~(3)で述べた効果をより確実に得ることができる。
このように構成されることにより、被印刷面18に形成された突起19の高さが変わっても、外部層2の厚さを変更することにより、上記(1)~(4)で述べた効果を得ることができる。
このように構成されることにより、印刷用ブランケット10、210、210aは、保護被膜層3により印刷面13の耐久性を維持し、かつ外部層2からのシリコンオイル等の滲みだしを抑制することができる。
このように構成されることにより、保護被膜層3により印刷面13の耐久性を維持し、かつ外部層2からのシリコンオイル等の滲みだしを抑制することができる。そして、印刷面13の耐久性を維持するために、保護被膜層3を硬度の高い材料で構成しても、外部層2の変形の妨げにならず、上記(1)~(6)で述べた効果を得ることができる。
このように構成されることにより、所定のシート状の材料を重ねて外部層2の厚さを調整することができるため、被印刷面18に形成された突起19の高さが変わっても、異なる厚さのシート材料を調達しなくともよい。これにより、外部層2を安価に構成することができる。
このように構成されることにより、印刷用ブランケット10、210は、変形が容易で被印刷面18の形状に追従しやすく構成することができ、上記(1)~(5)で述べた効果をより確実に得ることができる。
Claims (9)
- 表面に位置し、インキが置かれた印刷原版及び印刷する対象である被印刷面に押し付けられる印刷面と、
前記印刷面が前記印刷原版又は前記被印刷面に押し付けられる際の押し付け力が加えられる内部層と、
前記印刷面が配置されている側に前記内部層に接して設けられている外部層と、
を備え、
前記外部層は、
前記内部層よりもアスカーC硬度が小さい、印刷用ブランケット。 - 前記内部層は、
前記外部層と接する面に、前記被印刷面の形状が転写された形状に近似した形状を有する成形面を備える、請求項1に記載の印刷用ブランケット。 - 前記成形面は、
当該成形面の外周側に位置する外周側成形面を備え、
前記外周側成形面は、
前記印刷面を前記被印刷面に押し付けた状態において、前記被印刷面との距離が外周側に行くに従い小さくなるように形成される、請求項2に記載の印刷用ブランケット。 - 前記外部層は、
前記内部層のアスカーC硬度の値に対しアスカーC硬度の値が50%以上70%以下の範囲の材料で構成される、請求項1~3の何れか1項に記載の印刷用ブランケット。 - 前記外部層は、
前記被印刷面に形成された突出部の高さ寸法の2倍以上の厚さである、請求項1~4の何れか1項に記載の印刷用ブランケット。 - 前記外部層の印刷面側に保護被膜層をさらに備える、請求項1~5の何れか1項に記載の印刷用ブランケット。
- 前記保護被膜層は、
厚さが0.1mm以上1mm以下である、請求項6に記載の印刷用ブランケット。 - 前記外部層は、
複数の材料を重ねて構成される、請求項1~7の何れか1項に記載の印刷用ブランケット。 - 前記外部層は、
シリコンオイルを含有するシリコンゴムである、請求項1~8の何れか1項に記載の印刷用ブランケット。
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| EP16801687.1A EP3459739B1 (en) | 2016-05-17 | 2016-05-17 | Printing blanket |
| CN201680001802.1A CN107848291B (zh) | 2016-05-17 | 2016-05-17 | 印刷用橡皮布 |
| US15/317,275 US10800197B2 (en) | 2016-05-17 | 2016-05-17 | Printing blanket |
| KR1020167034382A KR101866223B1 (ko) | 2016-05-17 | 2016-05-17 | 인쇄용 블랭킷 |
| JP2018517976A JP6689375B2 (ja) | 2016-05-17 | 2016-05-17 | 印刷用ブランケット |
| PCT/JP2016/064635 WO2017199344A1 (ja) | 2016-05-17 | 2016-05-17 | 印刷用ブランケット |
| TW105139650A TWI627071B (zh) | 2016-05-17 | 2016-12-01 | 印刷用膠毯 |
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- 2016-05-17 US US15/317,275 patent/US10800197B2/en active Active
- 2016-05-17 KR KR1020167034382A patent/KR101866223B1/ko active Active
- 2016-05-17 CN CN201680001802.1A patent/CN107848291B/zh active Active
- 2016-05-17 JP JP2018517976A patent/JP6689375B2/ja active Active
- 2016-05-17 EP EP16801687.1A patent/EP3459739B1/en active Active
- 2016-05-17 WO PCT/JP2016/064635 patent/WO2017199344A1/ja not_active Ceased
- 2016-12-01 TW TW105139650A patent/TWI627071B/zh active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021166115A1 (ja) * | 2020-02-19 | 2021-08-26 | ||
| WO2021166115A1 (ja) * | 2020-02-19 | 2021-08-26 | 株式会社秀峰 | 印刷装置、及び印刷物の製造方法 |
| WO2021166114A1 (ja) * | 2020-02-19 | 2021-08-26 | 株式会社秀峰 | 印刷装置、及び印刷物の製造方法 |
| JPWO2021166114A1 (ja) * | 2020-02-19 | 2021-08-26 | ||
| JP7297141B2 (ja) | 2020-02-19 | 2023-06-23 | 株式会社秀峰 | 印刷装置、及び印刷物の製造方法 |
| JP7325599B2 (ja) | 2020-02-19 | 2023-08-14 | 株式会社秀峰 | 印刷装置、及び印刷物の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3459739B1 (en) | 2025-11-12 |
| JP6689375B2 (ja) | 2020-04-28 |
| CN107848291A (zh) | 2018-03-27 |
| EP3459739A4 (en) | 2020-01-01 |
| US10800197B2 (en) | 2020-10-13 |
| TWI627071B (zh) | 2018-06-21 |
| KR101866223B1 (ko) | 2018-06-11 |
| TW201740844A (zh) | 2017-12-01 |
| JPWO2017199344A1 (ja) | 2019-02-28 |
| EP3459739A1 (en) | 2019-03-27 |
| CN107848291B (zh) | 2020-08-28 |
| US20180154672A1 (en) | 2018-06-07 |
| KR20170140059A (ko) | 2017-12-20 |
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