JP3448033B2 - Watermarking method and apparatus for paper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for applying a watermark for preventing forgery on a paper surface of a predetermined print paper, and particularly forgery the paper surface of a predetermined print paper which is a thick letter. to makes it possible to apply a an effective watermark in preventing, applying a watermark printed from both sides of the thick paper, and to enhance the <br/> printing position accuracy of symmetry symbols to be printed from their sides, front and back Symmetric pattern seen through from
The present invention relates to a method and a device for watermarking a paper surface that can enhance the sharpness .

[0002]

2. Description of the Related Art As a conventional method for watermarking a predetermined printing paper sheet to prevent forgery, for example, a watermarking method in which a watermark is applied by using a pressing force of a pressure roll in a paper machine, and a paper surface There is a method of applying a watermark to a paper surface by applying a printing means. In the former watermarking method that uses the pressure of the pressure roll, the pressure roll (mold roll) must be created and replaced every time the pattern, characters, or figure of the watermark is changed. There was a problem in terms of economical efficiency because it was very expensive.

Further, the latter method of watermarking using a printing means has an advantage that the economical efficiency is remarkably improved as compared with the method of watermarking using the pressure roll, but on the other hand, it should be printed. Since a transparent oil-based ink is used as the watermark-imparting agent, for example, if the amount of the oil-based ink applied to the paper surface is too large, bleeding on the paper surface may occur and the watermark pattern etc. may become unclear. When the amount is insufficient, parts such as a watermark pattern will be missing, so it is difficult to apply a clear watermark pattern, etc. Therefore, there was a problem that it was necessary to manage the applied amount of severe oil ink. .

Therefore, the present inventor applies a watermark on a paper surface to prevent bleeding of the oil-based ink on the paper surface and the generation of a watermark missing portion at the time of watermarking the paper surface using the above-mentioned printing method. I applied for the device first, and have already been published and patented in Japanese Patent Publication No. 3-31593.

The gist of this patent is to fix a plate material, which is a planographic plate or a curved plate, on the surface of which a pattern, characters, figures, etc. are formed through a cushion sheet on a metal base or plate cylinder, and the plate material is fixed. A press roll for pressing the printing paper, which is superposed on the surface of the plate material, against the surface of the plate material on the upper side of the plate material. All of the appropriate amount of transparent ink applied to the surface of the material penetrates from the front side of the printing paper through its inner core to the back side, so that the transparent ink does not bleed in the paper surface direction. Penetrates in the thickness direction,
The feature is that watermarks such as characters and patterns can be clearly applied.

[0006]

However, in the apparatus for watermarking a paper surface by the above printing method, the plate material is pressed only on one surface of the paper to be printed, and the transparent ink is applied to the inner core of the paper to be printed. Since it is intended to penetrate the back surface of the printing paper after passing through the part, it is natural that the penetration amount of the transparent ink into the printing paper is affected by the thickness of the printing paper, especially when the printing paper is a thick letter. However, there was a problem that the watermark on the back side of the thick letter was insufficient and it was impossible to perform effective watermarking by the printing means.

That is, in the pressing means for pressing the plate material using only the surface using the watermarking device of the above patent, the thickness of the plain paper is not a problem, but the thickness of the printing paper is, for example, about 300 μm. When it is, it causes a shortage in the amount of transparent ink applied, and it is difficult to penetrate the transparent ink to the back surface through the inner core portion of the thick letter,
Watermarking of thick letters by printing means is not possible. Further, as a means for increasing the permeability of the ink from the front side to the back side of the thick letter, it is possible to increase the amount of ink applied to the plate material, but by applying a large amount of ink to the plate material, If you try to transfer (print) a large amount of ink to the paper surface, the ink will bleed faster in the paper surface direction than the speed at which it travels to the inner core of the paper, which causes bleeding on the paper surface easily. A clear pattern on thick letters,
It was impossible to apply watermarks such as characters and figures.

The present invention has been made in view of such conventional facts, and in particular, for thick letters, a printing method is used .
It is an object of the present invention to provide a watermarking method on a paper surface and a device thereof that can effectively perform a watermark with a clear pattern .

That is, according to the present invention, when a watermark is applied to a thick print target sheet, a watermark is printed by pressing a plate material from both front and back sides of the print target sheet at the same position (symmetrical position) on the front and back sides of the sheet. Plate material and the front and back of the paper
By increasing the positioning accuracy of the print position of the table of the printing sheet
A first object of the present invention is to provide a watermarking method that enables watermarking from both sides to the same printing position.

According to the present invention, the front and back sides of the printing paper are
Printing to improve the positional accuracy of the printing position and plate material
A processor that processes the shape and size of paper to a specified value.
A pattern that matches the front and back sides of both the front and back sides of the printing paper
It is a design with clear outlines for thick letters when combined with both front and back printing means that can print
A second object is to provide a watermarking device that enables effective watermarking.

[0011]

In order to achieve the first object, in claim 1 of the present invention, printing using a plate material
In approach, a method of applying a watermark to the print paper, the print paper to be fed paper printing machine is, when the back of the face up feed
Whether the paper is fed face-to-face,
The shape and size of the printing paper is set so that the specified printing position on the front and back sides matches the plate material in the printing machine with good positional accuracy, and then the printing paper with that shape and size setting is fed into the printing machine by facing up. Then, a surface watermark is printed on the surface of the paper to be printed , and then the surface is printed.
Paper is fed face down and fed back into the printing machine
It is characterized in that it is a watermarking method on a paper surface which is the same as the design of the front surface watermark printing and which has back surface watermark printing symmetrically matching the front and back sides .

Further, according to a second aspect of the present invention, the position to be printed on the front and back sides of the printing paper fed to the printing machine is determined by the printing machine.
The shape and dimensions of the printing paper are added to the set value in order to match the front printing plate and back printing plate with high positional accuracy.
The processing means to be processed , and the shape dimensions are determined by the processing means.
The each of the front and rear surfaces of the printing paper, front and back separate
Watermark is printed on the front and back of the printed paper.
It is characterized in that it is a watermarking device for a paper surface, which is provided with watermark printing means for printing the front and back of a symmetrical pattern to be printed by matching the front and back .

According to the first and second aspects of the present invention, since the watermark printing is performed on the printing target sheet with the transparent ink from both front and back sides of the printing target sheet, the printing target sheet is not printed. Even in the case of thick letters, the ink can be penetrated to the inner core portion of the thick letters and the watermark can be effectively applied to the thick letters.

Printing on both the front and back sides of the printing paper
Position and position accuracy with the plate material built into the printing press
To increase the print quality, set the shape and size of the printing paper to the set value.
Since it has a processing means to perform printing on both sides of the printing paper
It is possible to match the position to be printed and the plate material of the printing machine without squeezing, and by this, the matching accuracy of the printing position between the printing performed from the front side of the printing paper and the printing performed from the back side is improved, As a result, a clear contour figure and an effective watermark can be applied to thick paper.

Further, according to the present invention, means for increasing the precision of the watermarking position on the printing paper in the printing machine is provided.
Since only the processing means for adjusting the shape and size of the printing paper to the set value can be used together with the existing watermarking printing machine, the economical efficiency of the printing machine facility can be significantly improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the drawings. FIG. 1 is an overall explanatory view of a watermark imprinting device, FIGS. 2A and 2B are explanatory views showing a shape and size regulating machine for printed paper, and FIG. 3 is an explanatory view showing an example of a watermark imprinting printer. is there.

First, referring to FIG. 1, a watermarking procedure according to the present invention will be described. As for a large number of thick printing papers 3 to be watermarked, a wide base paper is used as a raw paper.
Although a large number of sheets 3 to be printed are prepared by cutting so as to have a predetermined shape and dimension, in the present invention, at the time of this cutting, the cutting dimension is set to a highly accurate sheet size. The processing means 1 for processing is required.

[0018] will be described later specifically described in the processing means 1, the printing paper is cut into a predetermined geometry by machining means 1, the paper feeding path surface watermark subjected printing machine 2 2
Watermark printing with transparent ink is performed on the front surface (one surface) of the printing target paper 3 which is supplied into the front surface printing unit 2B via A and is fed into the front surface printing unit 2B.

The front surface printing paper 3A, on which the surface of the printing target paper 3 is watermark-printed, passes through the paper discharge path 2C of the front surface watermarking printing machine 2 and is stacked and held outside the printing machine. Thus, the front surface printing paper 3A in which the front surface watermark printing is applied only to the front surface of the printing target paper is the paper feeding path 2A 'of the back surface watermark applying printing machine 2'.
Waiting for transfer to the vicinity. Each of the front surface printing papers 3A is supplied into the back surface watermarking printing machine 2'through a paper feed path 2A 'of the back surface watermarking printing machine 2'.

The front side printing paper 3A supplied into the back side watermark printing machine 2'is placed on the back side in the back side printing section 2B '.
On the other hand , after the back side watermark printing symmetrically coincides with the front side watermark printing portion printed on the front side, the paper discharge path 2
A double-sided watermark-printed paper 3B, which is sent out of the printing machine via C'and has watermark printing on both front and back surfaces, that is, a paper in which a desired watermark pattern is applied from both front and back surfaces of a printing target paper is obtained. .

Surface-printed paper 3 applied to the surface of the above-mentioned printed paper
The symbol of surface watermark printing A (shape, pattern or the like), the symbol of the back watermark printing to be performed on the back surface (shape, pattern, etc.)
In the present invention, it is possible to make both
An important problem, and an embodiment for solving this problem will be described with reference to FIG.

That is, as a means for matching the front and back sides of the respective watermarks printed on the front and back sides of the printing paper, the guide width dimension of the paper feed path of the front and back watermarking printing machine and the shape dimension width of the printing paper By accurately matching and, the relative position moth of the printing paper fed into the printing machine along the paper feed path and the plate material installed in both printing machines is determined, and The front surface watermark printing position of the print target paper supplied inside face up and the back surface watermark print position of the print target paper supplied inside face of the printing machine can be accurately aligned. In the present embodiment, a printing paper processing means for accurately cutting the shape and size of the paper to be supplied into the printing machine into the set shape and size.
Developed 1 .

In FIG. 2, as the processing means 1 , one using a cutting machine and one using an abrasive can be considered. First, an embodiment of the processing means using a cutting machine is shown in FIG. ) (B) will be explained.

FIG. 2A shows an embodiment of a cutting means for cutting a large number of wide printed sheets to be printed into a predetermined shape and dimension. First, a large number of wide wide sheets 3 are stacked. Using the cutting blade 4, the primary cutting is performed with a size slightly larger than the final cutting size.

The cutting surface of the stacked sheets 3 to be cut in the primary cutting is cut by the cutting surface 5A cut by the vertical blade surface 4A of the cutting blade 4 and the inclined surface 4B of the cutting blade 4. Although the cutting surface 5B is generated and the cutting surface 5A cut by the vertical blade surface 4A has sharp linearity (mirror surface),
The cut surface 5B cut by the inclined blade surface 4B of the cutting blade 4 becomes uneven, and the cut surface lacks linearity (specularity). Due to the generation of the uneven cut surface 5B, the shape and dimension accuracy of the cut printing paper is lowered, and therefore, when the watermark is printed on the same place on the front and back sides, the print position is displaced, and it is impossible to give a clear watermark. Has become a cause.

Therefore, in the present embodiment, when the four edges of the printing paper 3 are cut to form a printing paper having a predetermined shape, first, the printing paper is a rectangular paper slightly larger than the predetermined shape and size. The primary cutting is performed on the four sides of the primary cutting stacking paper 3'which has been cut by the primary cutting, and the secondary cutting is performed to finish the set dimensional width with high accuracy, and an accurate predetermined cutting is performed. Finish the shape and dimensions.

At the time of the secondary cutting, the cutting dimensions of the sheet to be printed are adjusted so that each cutting surface of the stacking paper that has already been primary-cut and rough-cut is a sharp cutting surface having a mirror surface. In order to meet this requirement, it is essential to increase the precision, that is, to make a gold dot. In this embodiment, as shown in FIG. 2B, the primary cutting stacking paper 3 ′ is secondarily cut. When finishing cutting each edge on a printing paper having a predetermined size, the vertical blade surface 4A of the cutting blade 4 is the primary cutting stacking paper 3 '.
The direction of the cutting blade 4 is regulated so as to be in contact with each of the cutting edges.

In this way, the primary cutting stack 4A of the cutting blade 4 used for finishing the four-sided edges of the primary cutting stacking paper 3'to the size of the predetermined shape by the secondary cutting should be cut. By deciding the direction of the cutting blade 4 so as to be in contact with the cut edge of the paper, and each cutting edge of the stacked paper that has been subjected to the secondary cutting by the secondary cutting, sharp linearity with mirror surface is secured, As a result, it is possible to cut and finish a large number of sheets each having a high shape and dimension accuracy.

The above embodiment is an example in which the shape and dimension setting processing of a large number of stacked papers is performed by the processing means using a cutting blade. For example, when the raw material base paper to be used is roll paper. As shown in FIG. 2C, the rotating abrasive 7 is brought into contact with the side surface of the roll paper 6 whose width dimension is cut to be larger than the set width so that the end surface of the roll paper 6 has a predetermined dimension width. Processing that uses a polishing machine to polish so that
It may be a means .

When using this abrasive, as shown in the figure,
By polishing the side surface of the roll paper to finish it into a predetermined width, it is possible to process the roll paper with high dimensional accuracy. Reference numeral 8 denotes a receiving roller for rotatably supporting the roll paper, and 9 denotes an axial position control body of the roll paper.

FIG. 3 shows an example of the printing units 2B and 2B 'in the watermark printing machine 2 and 2'to be used for watermark printing on the front and back surfaces of the printing paper. The printing units 2B and 2B' are shown in FIG. The configuration of the above is the Japanese Patent Publication No. 3-31593 mentioned above.
It is the same as that described in FIG. 1 of the publication. In other words, 11 is a metal base, 12 is a cushion seat, 1
Reference numeral 3 is a plate material, 14 is a paper, and 15 is a pressing roll, and the operation thereof is the same as that of the above-mentioned known example, so that the description of the operation will be omitted.

The difference between the front surface printing section 2B and the back surface printing section 2B 'is that the front surface printing section 2B is provided with a plate material 13 for watermarking the front surface of the printing paper, and The printing section 2B ′ is provided with a plate material 13 on the back side of the printing paper, which is symmetrical with the front and back sides of the watermark of the front side printing section 2B. There is no change in the printing operation of both front and back printing machines.

[0033]

As is apparent from the above, according to the watermarking method and apparatus of the present invention,
Since watermark printing can be applied to the same place from both front and back sides of the printing paper, even if the printing paper to be watermarked is, for example, a thick letter of several 100 μm, it is possible to apply the watermark using the printing method. It is possible.

Further, the printing paper fed into the printing machine
Since to enhance the geometry accuracy of <br/> printing paper as the printing portion is located precisely corresponding positions the plate member, the positioning accuracy between the plate material in a printing press該被printing paper is increased, therefore, the watermark since the respective both sides of the printing paper one by one, the positional accuracy of the print position for watermark printing to a particular same position of the target printing paper sides is enhanced
A double-sided printing means can apply an effective watermark by clearing the shapes of patterns, characters, figures, etc.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a watermarking device according to the present invention.

FIG. 2 is an explanatory diagram when setting the shape and dimension of the printing paper,
(A) is an explanatory diagram at the time of primary cutting, (B) is an explanatory diagram at the time of secondary cutting, and (C) is an explanatory diagram at the time of dimension setting by polishing the roll paper.

FIG. 3 is an explanatory diagram showing an example of a watermarking printing machine adopted in the present invention.

[Explanation of symbols]

(1) ... Processing means (2) ... Surface watermark printing machine (2 ') ... Backside watermark printing machine (2A), (2A') ... Paper feeding path (2B) .. Front side printing section (2B ') ... Back side printing section (2C), (2C') ... Paper discharge path (3) ... Paper to be printed (3 ') ... Primary cutting stacking paper ( 3A) ... Surface printing paper (3B) ... Double-sided printing paper (4) ... Cutting blade (4A) ... Vertical blade surface (4B) ... Inclined blade surface (5A), (5B ) ... Cut surface (6) ... Roll paper (7) ... Grinding machine (8) ... Receiving roller (9) ... Roll paper axial position regulation body (11) ... Metal base (12) ... Cushion sheet (13) ... Plate material (14) ... Paper (15) ... Press roll

Continuation of front page (56) Reference JP-A-6-115236 (JP, A) JP-A-61-35249 (JP, A) JP-A-2001-26177 (JP, A) JP-A-7-108753 (JP, A) JP-A-61-219683 (JP, A) Actual development Shou 60-178883 (JP, U) JP-B-3-31593 (JP, B2) JP-B 6-88399 (JP, B2) (58) Survey Areas (Int.Cl. ⁷ , DB name) B41M 1/00-3/14 D21H 21/40

Claims (2)

(57) [Claims] Claim: What is claimed is: 1. A printing method using a plate material, which comprises printing paper.
In the method of applying a watermark to the printer, whether the printing paper to be fed into the printing machine is front-side feeding or back-side feeding.
Even if it is misaligned, the specified printing position on the front and back of the printing paper
The shape and dimensions of the printing paper are processed to the set values so that they match the plate material in the printing machine with good positional accuracy, and then the printing paper with the set dimensions is fed face- up into the printing machine. Surface watermark printing is applied to the surface of the printing paper,
Next, feed the printed paper with the front surface watermark printed face down.
The paper is re-supplied into the printing machine and the front side watermark is printed on the back side.
A method for watermarking a paper surface, which is characterized by performing a watermark printing on the back surface , which has the same shape as the pattern to be printed and which is symmetrically matched to the front and back sides . 2. Printing of front and back sides of printing paper fed to a printing machine
Mark the position to be printed on the front side of the printing press
Processing means for processing the shape and dimension of the printing paper to a set value so as to match the printing plate material with good positional accuracy, and the processing means.
Printing is performed individually on each of the front surface and the back surface of the printing paper whose shape and size are determined by the means , and
A watermark imprinting device for a paper surface, characterized by comprising watermark printing means for printing the front and back symmetrical patterns printed on the front and back respectively.