A printing system and process for printing security materials and anti-counterfeit documents with embossed printing

Abstract

The present invention discloses a printing system with embossed printing and its process for security material and anti-counterfeit documents, in the printing of anti-counterfeit securities, various security features are used to increase security. The most important security element feature of security documents is embossed printing. Current technology has limitations in terms of durability, quality and number of colors in intaglio embossed printing. In addition, the equipment related to the security industry is large and expensive. In the present invention, a system for creating various security features in securities is introduced, in which a process including embossed printing is introduced into an integrated device. The current innovation not only eliminates the above-mentioned limitations of traditional printing plates, but also makes it possible to print low-quantity or low-issued documents and significantly reduces printing costs.

Description

TECHNICAL FIELD

[0001] The technical background of the present invention relates to the printing industry in general, and in particular to the printing of security documents, in which intaglio printing is used to increase security. BACKGROUND

[0002] Intaglio printing is the most important security element and feature in the printing of security documents such as banknotes, securities, banknotes, banknotes and security packaging, in which in the currently common technology, the intaglio printing system is used as a security printing machine. Conventionally, in this common technology, the required printed pattern is engraved on some plate or engraving tool by using some methods such as sharp scrap removal tools, engraving, CNC, laser and intaglio processing acid. Then, the ink (up to four different colors) is transferred from the gelatin to the engraved part of the printing plate by the gelatin plate. In the next stage, the security document passes through the engraving cylinder and another metal cylinder; in this way, the ink available in the intaglio is transferred to the paper due to the pressure applied by the cylinder and the printing plate. After the ink dries, the pattern will be created as a touchable and intaglio print. Generally, the security and security printing line consists of six machines, which causes some problems and limitations:

[0003] - In order to print only one document with all the conventional security features, at least six large machines are required. This leads to system failures and a large amount of paper waste, in addition to a complex process and system, and a large scale of machinery.

[0004] - In order to print securities, the above printing machines complement each other, requiring a variety of infrastructure such as printing plates, gelatin, analog rotary screen printing, automatic molecule systems, etc.

[0005] In the prior art:

[0006] In dry offset, at least 16 separate colors are used to print the background security design on both sides of the security; therefore, a waterless plate rainbow printing system is required.

[0007] Gathering the tools required for the printing process and the necessary facilities is time-consuming, so sometimes in addition to a large amount of cost, it takes several days just to prepare the tools.

[0008] The molecule system often has some problems in generating serial numbers, such as counting number errors, counting back and forth, waste, etc.

[0009] The mechanism and process of printing with invisible ink is time-consuming and low quality.

[0010] OVI ink (multicolor, optically variable ink) is used for screen printing, as it is the most important and sensitive ink in terms of security, i.e. the so-called variable ink. Variable ink is expensive, and considering the color combination and quality, there are some limitations in printing colors.

[0011] In the intaglio printing system, engraved copper or steel plates are used, which cause high infrastructure and production costs. Intaglio is currently used to print securities, but the plates have been removed in the present invention.

[0012] It is worth noting that the world's large companies that produce intaglio equipment have used intaglio as infrastructure for about 70 years, which is not only time-consuming and expensive, but also has limitations in terms of quality and the number of colors. There is currently no observation of a color matching scheme for relief printing with the printing system. In other words, only completely independent colors can be used (Pantone inks, separate printing), and there are limitations to separate colors (up to 3 to 4 Pantone colors). Most work systems in the printing field use similar technology.

[0013] Some advanced companies in the field cooperate with each other to upgrade: engraving procedures for intaglio or gelatin plates, intaglio production, operating mechanisms, paper transport, ink types, software and hardware, and converting analog systems to digital systems.

[0014] As an example, international application WO / 2007 / 113640 discloses a process for manufacturing security paper in which the surface of the paper is sealed using engraved intaglio plates so that the sealing process is on at least 80% of the surface of the paper. In this process, a relief pattern is formed in the places where the ink passes through the paper, and a flat print is formed in the places where there is no engraving, so at least part of the relief or flat print is made with transparent or semi-transparent ink.

[0015] According to the information obtained from the most famous documents in the field of security printing and large printing plant associations, most security paper printing plants currently use a single printing system and process. The intaglio printing technique and its general process have been used in different inventions for more than 70 years, but the current technology is not cost-effective in printing security documents with low circulation. Therefore, the equipment is not suitable for the practice of small and medium-sized enterprises (SMEs) in the medical, food, cosmetics, and hygiene packaging industries, as their printing needs are lower than the issuance of government documents such as banknotes.

[0016] Those skilled in the art are aware of the importance of printing relief on securities, such as banknotes, and of course better tactileity on new securities, but unfortunately, tactileity lasts for a maximum of six months. The early decline in the tactileity of relief printing is an important issue at international security printing conferences.

[0017] In the existing technology of intaglio printing, the color is applied to the printing plate and the color is removed from the places where there is no engraved pattern with a doctor blade. In the existing technology of intaglio printing, the color is applied to the printing plate and the color is removed from the places where there is no engraved pattern with a doctor blade. However, due to the fact that this method of removing ink is not ideal, there are usually some color particles remaining in the parts of the printing plate where there is no pattern, and therefore the color particles that have not been removed spread on the paper and cause undesirable embossed points in other parts of the paper, thus reducing the quality and elegance of the final work.

[0018] In the present invention, there is no longer a limit to the number of colors and circulation of the relief printed securities. In addition, the most important feature of the said field, which is cost-effective and time-saving security relief printing, has an ideal quality and reduces infrastructure costs, making the present invention effective for anti-counterfeit securities, especially in the small and medium-sized enterprise sector, which is more desirable compared to the conventional method.

[0019] The function of the invented technology in the integrated single machine is equivalent to 6 commonly used giant devices, and it does not require much infrastructure and initial cost. In addition, the present invention also provides the lowest (the urgent need of today's market) and the largest production circulation, and has very high quality and efficacy. In addition, the present invention also provides the lowest (the urgent need of today's market) and the largest production circulation, and has very high quality and efficacy. The present invention aims to improve and modify the production of anti-counterfeit documents and packaging, and to remove the traditional stencil and silk printing cylinder. SUMMARY

[0020] In the technology of the present invention, special paper or other printing material (hereinafter referred to as "PM") for securities is introduced into the paper feeding system of the machine. The paper feeding machine moves the paper on a vacuum conveyor, and the vacuum system of the conveyor makes the paper flat on the conveyor. In the second part of the system, hologram or gold foil printing is performed on the paper. The third part unit is designed for patterns and images that should be printed using the said invisible ink. In the fluorescent color printing part, phosphor ink is used to increase brightness and prevent copying counterfeiting. Subsequently, in the initial color printing unit, the main patterns, names, identities, etc. of the item are transferred to the paper with full color and high quality printing process, and then coated using the cylinder printing system. In the coating system, a water-based coating composed of nanomaterials is used to avoid bacterial infection, make the paper waterproof, and make it possible to remove stains on the securities used.

[0021] In the rotogravure printing part, a digital rotogravure printing is achieved using the stencil technology. The silk printing is carried out using very beautiful and expensive OVI ink, which is one of the security features for printing the desired images on the paper.

[0022] In the next section, the embossed printing will be applied to the paper or printed material. An innovative system is applied to the distribution and transfer of the colored pigments powder, converting it into an embossed print. In the drying tunnel, the embossed print is fixed. The last section of the printing process is the delivery of the paper on the trays. In addition, a computerized system and a consular are installed to facilitate the work of the operators and better control and transfer the computerized pattern files.

[0023] In the invented security printing technology, no gravure, gelatin, screen, flexographic, digital modules and systems are used for printing any security features and elements. Instead, inkjet technology is used for all steps of printing. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A side view of the entire security printing system according to an exemplary embodiment of the present invention is shown (due to the limited width of the paper, the drawing is shown in three rows, but in fact it is a single continuous system, i.e. the entire row should be continuous from the "start" point to the "end" point in the direction of the arrows).

[0025] Figure 2 A side view of the printing material feeder for the security printing system of the present invention is shown.

[0026] Figure 3 A side view of the foil or hologram printing section of the present invention is shown.

[0027] Figure 4 A side view of a set of color printing units of the present invention is shown.

[0028] Figure 5 A side view of the varnish coating unit of the present invention is shown.

[0029] Figure 6 A side view of the cylinder rotary screen printing section for printing the variable ink OVI in the present invention is shown.

[0030] Figure 7 A side view of the embossed printing system of the present invention is shown.

[0031] Figure 8 A schematic illustration of the transfer and distribution system of the printing material of the present invention is shown.

[0032] Figure 9 A side view of the dryer tunnel of the present invention is shown.

[0033] Figure 10 A schematic illustration of the paper output of the drying section in the present invention is shown.

[0034] Figure 11 A schematic illustration of the central computer control system of the present invention is shown. DETAILED DESCRIPTION

[0035] In the present invention, a mechanical mechanism is used to feed the printed material (204) in the first section (100), which is called "feeder" in the printing industry. The feeder system (101) consists of a blower and suction mechanism. The system can transfer the feed (204), which is usually in the form of paper, i.e. securities, in two ways, one after the other or alternately.

[0036] In order to move the paper stably and without shaking, the paper is transported with the help of the vacuum system (103) used on the conveyor (104) and is transported from the beginning to the end of the conveyor by the paper feeder.

[0037] The feeder system pushes the PM or paper (204) onto the vacuum plate (103) to avoid displacement.

[0038] In the second section (200), using digital inkjet head technology, inkjet printing (203) of the files received directly from the computer system (900) prints the pattern using the ultraviolet (UV) system (like the operation of inkjet printers). The ultraviolet (UV) ink does not dry normally, but is only sensitive to ultraviolet (UV) light (207-303-306-309-613); therefore, once the ultraviolet light is applied, the ink dries completely without any wear and tear. In the said printing system, since the stability and better water, wear and light resistance on the PM, all the printing units use the UV system.

[0039] In the second section (200), the printing of the holographic pattern is done using a metal foil.

[0040] The process performed in this section of the system is such that the material (204) or paper passes from the vacuum conveyor (103) and the printing unit (200), and thus the pattern files received from the computer (900) are printed or actually transferred to the PM (204) by the inkjet system (203) using ultraviolet (UV) varnish. Then, the PM and the gold foil or hologram roll (205) enter the ultraviolet (UV) dryer bag (207). In the dryer bag, the ink printed on the material dries together with the polymerized foil roll, in addition to the drying effect, it also serves to stick the holographic material on the foil to the surface of the paper. At this point, only the part of the paper on which the ink is printed is polymerized under ultraviolet (UV) radiation and absorbs the metal or hologram while drying with ultraviolet, and thus the desired image is printed on the material (204).

[0041] In this part of the system, the hologram foil is wound into a conical cylinder (205) of the desired predetermined length. When the paper (204) is inserted under the hologram roll, both the paper (204) and the conical cylinder (205) are laminated under the pressure of the cylinder against cylinder (209). In the UV drying system (207), the UV rays are directed onto the material from about 3 cm above the foil, and the printed UV ink binds with the polymer hologram foil. In other words, when the ink dries and hardens, these UV-printed parts hold the hologram substance as a printed pattern, and the holographic glass paper with the remaining hologram substance is separated from the paper and transferred to the roll collection cylinder (206).

[0042] The paper transfer rollers (such as 208) only serve the purpose of paper transfer between units.

[0043] The assembly of the third part (300) relates to the invisible, fluorescent color and main color printing, which are some features of security printing in the field of security and banknote printing. The operation can be performed in this part using an innovative system of a new engineering, without the need to use plates.

[0044] In the third part (300), the same technology as the inkjet head such as unit (201) is used, but this time four-color invisible security ink is used with color heads, which will be colorless after printing the pattern on the material (204), and cannot be seen with the naked eye. This pattern printed with invisible ink reacts under the irradiation of 400 nanometer ultraviolet light in the paper currency detection device, etc. 400, and changes the invisible pattern into a visible pattern of four colors of yellow, red, green, and blue, so as to be printed like Pantone ink. Printing with different color ink combinations cannot achieve the effect of this type of ink. Due to its durability and resistance, the UV ink series is also used for this printing, and after printing in the invisible printing unit, the 'yellow, green, blue, red' color (301) is dried in the UV dryer (303), and the PM enters the next stage.

[0045] The inkjet head technology of "blue, green, orange, red" color (304) is also used for fluorescent color printing part. In these four-color inkjet color heads, phosphor and fluorescent ultraviolet (UV) ink series are used for four different Pantone colors, respectively, and have a certain transparency and reflectivity after printing the pattern on the PM (204). These inks are usually more transparent than ordinary inks, and can be seen under ultraviolet (UV) light with a radiation frequency of 400 nanometers (for example, a paper currency detection device). The pattern on the paper (204) with different colors (such as yellow-blue-red-green) is imprinted by the fluorescent printing head (305) and dried under the UV dryer (306) to further fix and improve the durability. Then, the paper is transferred to the next stage.

[0046] In part (307) operates with the use of the security pattern on the file and paper, with the bottom, to identify the files and packaging of companies, offices or organizations.

[0047] The material (204) is passed through the initial color printing unit (307). The function of this unit is also similar to the color technology unit (201), but it uses two or more colors and an additional print head, so that CMYK + LM + LC, which are all light blue and light red magenta, the quality is multiplied, the printing is done as a combination of colors (combination of about 1600 million colors). Inkjet printer, prints the background pattern received from the computer (900) directly on the PM (204) with high quality and without the need for infrastructure such as plates. For durability purposes, the PM (204) is dried using UV (309) and then sent to the next unit through cylinder (310) and cylinder (311).

[0048] In the over varnish unit (400), the PM (204) enters the varnish printing unit (401), the entire surface of the PM is covered with varnish by the cylindrical printing system (402), then it is dried with UV dryer (406) if using UV ink, dried with air in the air drying unit (410) if using air-drying varnish (water-based), and then further dried with the infrared (IR) system of the hot air dryer (408) and the hot air dryer (409).

[0049] In the varnish part (400), the base antibacterial printing process is also applied to the PM (204). The varnish tank (405) is a liquid (nanomaterial-based) ink storage tank in which the chrome cylinder (403) is immersed, and it is a chrome-plated copper roller and 200LPI (lines per inch) tram processing paint. The varnish is transferred from the tray to the anilox cylinder (402). The chrome roller (403) absorbs the material, and the built-in doctor blade (404) distributes the ink evenly on the surface of the cylinder. Then the paint is transferred to the 400 (lines per inch) tram anilox cylinder (402), and then the paint is transferred to the PM (204) through the anilox cylinder and the roller (407) of the paint printing (402). Finally, the printed antibacterial varnish is dried and fixed in the hot air dryer (408 and 409).

[0050] This stage makes the printed file and paper more durable. The application of this step of printing will make the securities waterproof, so if something is written on the paper with a pen or marker, it will be erased, which will improve the long-term cleanliness and appearance of the file.

[0051] Rotary screen cylinder OVI (500) is specialized in printing the best securities paper ink, which is the most attractive and expensive ink in securities paper printing.

[0052] This type of printing or ink is used for expensive paper and documents. In Europe and the United States, OVI ink is used on banknotes, but in many other countries, it is only used on national identity cards and passports. The main feature of OVI is anti-counterfeiting, which can see different colors from different angles. For example, it is green at 90 degrees, and it is gold at 45 degrees (of course, there are various colors available). So far, in the existing technology in the world, the traditional hole screen printing system is used in the form of a plane and rotation, but in this invention, an innovative and unique process is also used for this part of the printing.

[0053] The rotary screen printing unit (501) receives the image or pattern from the computer (900). In the system, the hole printing technology (503) is used, in which the laminated paper and the polymer master (506) are created by the master creation system (502). With the help of a thermal head, the master creation system (502) prints the pattern on the master. Then the master is transferred around the cylinder (509) and the printing function is performed in the rotary screen printing with a squeegee roller (508), which is a cylinder printing blade. Then the ink is transferred to the hole cylinder by the pressure applied behind the engraved master. The image or pattern is pressed on the PM (204) by the cylinder pressure (511) and the hole printing technology (503). The printed pattern is fixed in the dryer (510) by hot air.

[0054] The sixth part of the invention (600) is designed for the most important features of the security document.

[0055] In this part, the image is transferred from the computer console (900) to the inkjet head technology (602) to print the material (204). But this time the color head (the four main colors of CMYK) is used, through the combination of which 1600 million colors can be made and printed. The pattern received by the inkjet head is printed in the printing unit (601) on the PM (204).

[0056] As mentioned earlier, UV ink only dries when exposed to ultraviolet light. In the current innovative technology, we have been able to use dry nanoscale forms of powder color substances in the time interval between printing (602) and ultraviolet irradiation (613). In other words, when the ultraviolet (UV) paint on the PM is still wet, the powder color substance is applied using a heat and ultrasonic upgrade system to create the desired embossed printing. In this part of the printing system and process, the color substance is fixed in the form of embossed printed patterns. The embossed pattern pigment transfer and distribution system (610) is the core of the innovative printing system, which has been embedded in the embossed printing unit (604).

[0057] UV ink is used in inkjet head technology (602) to replace the intaglio composite liquid paste substance.

[0058] In the following article, we will describe the composition and performance of the embossing pattern system (610) in the transfer and distribution of the pigments.

[0059] The transfer and distribution of the embossing pattern system (610) is composed of several parts. The centrifuge system (6102) is responsible for providing suction and blowing in different parts. The centrifuge system (6102) is equipped with a high-speed centrifuge motor (6103) with a rotation speed of 10,000 rpm. Due to the rotation of the centrifuge motor (6103), an air flow in the clockwise direction is generated in the channel (6104) around the fan. The design of the channel (6104) is intended to create a suction air flow on one side of the centrifuge system (6102) and a blowing air flow on the other side. The air flow will carry the pigment powder particles. In order to avoid the remaining pigments from settling on the walls of the device, a ceramic coating is applied on the inside of the outer wall of the channel (6104) around the fan. The blown air flow is directed to the lower empty space of the centrifuge system (6107) and transports the color substance to the lower part of the centrifuge system (6102) by entering a small turbine (6118).

[0060] The turbine (6118) is responsible for transferring the color substance uniformly to the upper space of the distribution nozzle (6613 and 6614) at a controlled speed and quantity. The turbine system (6118) is composed of a box (6142) with an internal turbine impeller (6136). At the top of the turbine (6118) there is an inlet (6117) for the entry of the color substance. The color substance enters the chamber between the turbine impeller (6136) and the turbine box inner wall (6141) from the upper inlet (6117), which is circular and tangent to the turbine impeller blade tip, so the color substance is trapped between the blade and the inner wall (6141). Therefore, after passing through the blade in front of the upper inlet (6117), the blowing pressure generated by the centrifuge motor rotation (6103) is disconnected or released from the trapped color substance. The color substance only passes through the turbine's lower outlet under the control of the driving force of the turbine impeller (6136) and then leaves the turbine, falling into the nozzle conical tank (6106).

[0061] In the nozzle slot (6106), several nozzles are embedded to guide the color substance uniformly to the surface of the printed material, such as paper (204). In the first stage, at least two nozzles (6113) are considered for the color substance after passing from the turbine (6118). The colored pigment that falls from the turbine (6118) is guided to the head of the nozzle by the wall (6140) of the nozzle. The pressure cutoff blade (6112) is installed on each nozzle, which uniformly pours the color substance from the first nozzle (6113) by rotating.

[0062] In addition, the pressure cutoff blade (6112) is responsible for mixing the embossed printed color substance.

[0063] The color substance is released from the first stage nozzle (6113) and enters the second stage nozzle (6114). The passage of the color substance from the turbine (6118) of the first stage nozzle (6113) and the second stage nozzle (6114) and the cutting blades (6112) enables the distribution of the color substance on the surface of the PM (204) to obtain maximum uniformity, softness and without any disturbance.

[0064] The printing material (204) is placed on the surface of the vacuum cylinder (612). The perforated plate on the air cylinder (611) fixes the PM (204) in the desired position by the vacuum force. The surface of the PM (204) that was printed with the inkjet head (602) before and the pattern printed on the paper is still wet when it passes in front of the first stage and the distribution nozzle placed in the second stage (6114). Therefore, the powdered color substance adheres only to the wet printed pattern and not to other areas, thus covering only the PM, such as the paper (204). In order to distribute the powdered color substance uniformly on the wet part of the PM, several plates are installed on the surface of the cylinder (612) and several vibrators (6115) are installed on the plates, causing vibrations on these plates (6116). Due to the vibrations of the PM, the paint will be uniformly delivered to all areas of the printed and wet pattern. After this stage, the color substance adheres to all the wet parts of the PM, and it is necessary to remove the excess paint from the dry parts of the PM. For this purpose, several pairs of soft brush rollers (6108) are provided, which, together with the suction force (generated by the centrifuge system), are used to remove the excess color substance from the work (such as the surface of the paper). These soft brush rollers rotate inward (in opposite directions to each other). The color substance that is not attached to the surface of the PM is lifted up by the brushes and the suction air and suspended in the air, returning to the system for reuse. In order to improve the effect of the brush rollers (6108), a channel (6111) for pressure making and air distribution is embedded in the upper part of the pairs of brush rollers (6108), directing the blown air to the vertical channel (6127) and then to the vertical nozzle (6122). At the end of each vertical nozzle, a small truncated square cone (6119) is embedded at an angle to the nozzle axis to reduce the cross-sectional area of the nozzle, increase the air pressure of the blower, and direct the wind from parallel to angular with respect to the PM.

[0065] Two blower nozzles (6122) are installed for each pair of brushes. At the connection of the vertical channel (6127) with the nozzle (6122), each nozzle provides an electromagnetic or electric valve (6121) to increase the effect and power of the air blown from the nozzle (6119), and the nozzle path is opened only when the printed PM (204) is located in front of a pair of brushes (6108). The electromagnetic valve (6121) is controlled by the operation of the optical sensor (6130).

[0066] The air that is blown into the channel (6111) is provided by a pressurized air tank (6110). The pressure inside the air tank (6110) is maintained by a centrifuge (6102).

[0067] The color substance that rises from the surface of the PM (204) passes through the soft brush (6108) and is transferred into the channel around the centrifugal fan (6104) with the suction air flow. A filter valve (6109) with a mesh filter is installed on the path of the color substance to enter the channel around the fan (6104) to prevent unnecessary waste and objects from entering the channel around the centrifuge (6104). After this valve (6109), an impeller (6105) is embedded at the entrance of the centrifuge to the channel (6104) to help and strengthen the suction force on the color substance and control the volume of the substance that is sucked. After the color substance passes through the impeller (6105), it re-enters the channel around the centrifuge (6104) to perform the next step of transfer on the PM (204), thus completing the transfer and distribution of the color substance in the printing material cycle.

[0068] After removing the excess color substance from the dry part of the PM surface through the suction nozzle (6101), the PM passes under the UV light (613) by the cylinder (612). At this time, when the UV compound dries under the UV dryer (613), the color substance distributed by the distribution system (610) dries with the ink, and the PM is transferred to the next stage by the interface cylinder (609) for final fixation. Then, in the embossed printing path, the PM (204) passes through the interface cylinder (609) and the heater (614) and the heater (605). In order to improve the drying of the ink, the PM passes through the hot air blower (606) and the hot air blower (607), and the ink dries with the accompanying nano color substance. In order to fix and ensure a long-lasting and wear-resistant product, the PM is transferred to the next part.

[0069] In the delivery part (700), the nanoparticles are chemically reacted by exposure to the heat of the infrared (IRs) (701) and the infrared heater (702), and therefore, they penetrate into the material (204), increasing the thickness of the printed pattern by 5 to 100 microns (the thickness created can be changed and controlled according to the type of work and the material). Then the PM passes through the cold air blower (703), which blows dry and cool air to the surface of the printed material (204), and finally the printed pattern is fixed.

[0070] In the paper and handling receiver part (800), the PM (204) is obtained from the carrier cylinder of the carrier interface by the paper fixation chain (801). Then the paper is stacked on the tray (802) to be transferred to the next step, such as cutting, binding, or other processes.

[0071] In the central computer control (900) section, a computer system is installed to receive and transmit the pattern to the system, which can be controlled by the operator.

[0072] In this section, the embedded system processes the received graphic file and separates and tears the pattern of each unit according to the defined software and sends the pattern file to the required parts. In addition, it has become possible to analyze the printed sample in the control unit (900) and control and check the quality by the operator in the collator.

[0073] Industrial applicability

[0074] The technology introduced in the present invention can meet the needs of governments; to print banknotes, securities and anti-counterfeit documents (such as checks, promissory notes, bonds, health labels, and food and drug-related products, which require more security features) and have to buy and / or import expensive machines that they can not afford.

[0075] The system, due to its low cost and better affordability, can even be used for documents that require printing with low issuance or quantity, because; it makes the printing cost of low issuance affordable and practical.

[0076] The technology can be used in all printing systems, including web and sheet-fed offset, flexographic, daylight printing, digital and inkjet printing.

[0077] Advantages of the present invention

[0078] Using the technology introduced in the present invention, the following goals and benefits are achieved in the printing industry:

[0079] - By replacing digital full-color inkjet systems and using existing inkjet head technology with very small experiments and special modifications on invisible, raised, phosphorus-containing printed parts, instead of on waterless dry offset systems, a set of units and equipment is provided that can print the required quality without the need for the infrastructure and high costs required by the previous equipment.

[0080] - With the help of the invented system and inks, the huge and complex infrastructure necessary for printing is eliminated in the invented section.

[0081] - By the all-in-one equipment, the quality and range of color selection (160 million color combinations) are constantly improving. All the steps required for the printing of securities with all the elements and complex security features are done in one equipment.

[0082] - Fast printing and infrastructure, plate, gravure, gelatin removal, reducing the time required to change the pattern (less than 30 seconds).

[0083] - The possibility of special printing with the lowest issue volume (at least 6 times more than the quality).

[0084] Even the possibility of printing a single sheet means that the tools and infrastructure required, and these require a large amount of money and considerable time (a disadvantage of the current technology, low-circulation security printing) have been solved in the existing system. This means that all this infrastructure has been dismantled, the time and cost of printing has been greatly reduced; as a result, the issue volume limit has been removed. Therefore, the technology of the invention is a printing method suitable for anti-counterfeit documents and securities.

[0085] - In the previous technology, although it is costly and time-consuming, the most important security feature of securities: document emboss printing is acceptable, but people use it for about 6 months, after which the emboss printing is removed. Thus, their security feature is lost. As a result, the printing of the intaglio emboss can be seen on new banknotes, but unfortunately it is lost on old banknotes.

[0086] - In the printing process of the invention, since the printed color substances act on the paper or printing material in a completely uniform manner and completely cover the pattern, the precision, life and quality of the printed pattern are at least 10 times higher than in the previous technology. Even the number of printed colors of the invention cannot be compared with intaglio printing technology, because the former uses at most 4 separate colors and the colors cannot be combined, but the latter (innovative technology) can use 4 main combined colors and other separate colors, which makes it possible to use more than 16 million colors. It is worth noting that all printing processes are done by inkjet printing digital systems, and the printed patterns have greater durability, quality, color clarity, image resolution and processing precision.

[0087] - The printing of the invisible pattern in the invisible anti-counterfeit ink unit (301) is used for the security printing of invisible marks, patterns or texts on the paper, which are invisible to the naked eye, but when the invisible pattern is scanned or copied, it is very important for preventing counterfeiting.

[0088] - In the current technology, to print phosphor and fluorescent patterns and images in the 304 unit, and to print pattern, text and image colors using CMYK+LM+LC colors in the 307 unit, huge equipment and infrastructure costs such as printing plates, gelatin plates, etc. are required. They even need special equipment and labor to produce some of the infrastructure, such as printing plates.

[0089] - The most important issue and focus of the invention is security printing, i.e. emboss printing, which is printed in the current conventional technology using four different colors and intaglio equipment with printing plates, a high-cost technology.

[0090] - The technology introduced in the present invention can be used in various fields, such as packaging or wrapping in the health care and food industry, to increase security and prevent counterfeiting in the packaging, as the cost of security features is reduced and the ease of the printing process.

[0091] - The present invention adds an antibacterial function to the document, in particular to the banknote, and reduces the contamination of the security document (such as Covid-19 virus, stains, dirt, people's handwriting, etc.). Since banknotes have an important role in the health of a community, antibacterial banknotes in turn will also enhance the health and hygiene of a community.

[0092] - The possibility of printing serial numbers and personalized barcodes, as well as variable information at all stages of the unit (color, invisible, fluorescent, phosphorescent, even with variable information in relief printing) and the use of the CTS system, the transmission of data from the computer to the system, the paper is fed into the device at a stage, and the completion without waste is possible.

Claims

1. A system for printing documents and security paper, the system comprising: A mechanical feeding mechanism (100); A holographic pattern printing portion (200); An invisible, fluorescent, and primary color pattern printing portion (300) using at least three inkjet units (302, 305, 308); A clear varnish coating portion (400); A rotating cylindrical screen printing section (500) for OVI variable ink; An embossed printing portion (600) includes: At least one UV inkjet printhead; and Embossed pattern powder pigment transfer and distribution system, designed to use airflow to transfer pigment to the surface of printing material and create at least 16 million colors by combining four main colors; A conveying section (700); A paper and conveying receiving part (800); And a central computer control unit (900); Its features are: The holographic pattern printing section, the invisible, fluorescent and main color pattern printing section, the varnish coating section, the embossing section, and the rotating cylindrical screen printing section are all integrated into a single unit.

2. The system according to claim 1, characterized in that: The embossed pattern powder pigment transfer and distribution system (610) is further equipped with a centrifuge system (6102), wherein a centrifugal motor (6103) provides intake and exhaust air to transfer colored pigment through a channel (6104) into a chamber below the centrifuge (6107) and then to a turbine (6118), wherein the channel is mounted around the centrifugal motor.

3. The system according to claim 2, characterized in that: The turbine (6118) includes a box (6142) with a turbine impeller (6136), an inlet (6117) embedded in the top of the turbine (6118) for use as an inlet for pigment, and an outlet (6138) for use as an outlet for pigment, through which the dye falls into at least one conical tank (6106).

4. The system according to claim 3, characterized in that: At least one nozzle is installed in the conical tank (6106) for smoothly distributing dye onto the surface of the printing material, wherein the color material falling from the turbine (6118) is directed by the wall of the first nozzle (6140) to the outlet of the first nozzle.

5. The system according to claim 4, characterized in that: Each of the first nozzles has at least one pressure cut-off device (6112), wherein the color material is mixed together by its rotational motion and then uniformly ejected from the first nozzle outlet (6113) on the surface of the printing material.

6. The system according to claim 5, characterized in that: The colored material enters at least one second-stage nozzle (6114) after passing through the first nozzle (6113).

7. The system according to claim 2, characterized in that: The embossed printing portion (600) has at least one inkjet printhead (602) that prints a pattern on the printing material before dispensing powder pigment from a second-stage nozzle (6114) to allow the powder color substance to adhere to a wet portion of the printing material (204).

8. The system according to claim 3, characterized in that: The tip of the turbine impeller (6136) is tangentially mounted to the inner wall of the turbine housing (6141) so that, during the circulation of the turbine impeller (6136), the pigment is retained between the impeller and the inner wall (6141) of the housing.

9. The system according to claim 2, characterized in that: The perforated cylinder (612) fixes the printing material (204) in the desired position by means of vacuum force.

10. The system according to claim 9, characterized in that: Multiple plates are mounted on the surface (612) of the perforated cylinder, at least one vibrator (6115) is mounted on the surface, and the vibrator generates vibration on the plates (6116) and the printing material, causing the pigment to be evenly distributed to all wet areas of the printed pattern.

11. The system according to claim 7, characterized in that: At least one pair of soft brush rollers (6108) are mounted next to at least one second-stage nozzle (6114), wherein air intake between the pair of soft brush rollers is configured to separate excess color material from the printing material (204) as the pair of soft brush rollers brush.

12. The system according to claim 11, characterized in that: A channel for air pressure and air separator is installed on the upper part of the pair of soft brush rollers (6108), which guides the blown air to a plurality of vertical channels (6127) and then to a plurality of vertical nozzles (6122).

13. The system according to claim 12, characterized in that: At least one truncated square cone (6119) is mounted on the tip of each of the vertical nozzles, wherein at least one of the truncated square cones is inclined to the axis of the vertical nozzle.

14. The system according to claim 12, characterized in that: At least two blow nozzles (6122) have been installed on each pair of soft brush rollers (6108).

15. The system according to claim 12, characterized in that: At the connection between the vertical channel (6127) and the nozzle (6122), each nozzle is equipped with at least one solenoid valve (6121) to open the path of the nozzle as the printing material (204) passes through the pair of soft brush rollers (6108).

16. The system as described in claim 15, characterized in that: The solenoid valve (6121) receives commands from at least one optical sensor (6130).

17. The system according to claim 12, characterized in that: The air blown into the channel is supplied by the bellows (6110).

18. The system according to claim 2, characterized in that: A filter valve (6109) is installed at the inlet of the channel (6104) around the centrifugal motor, wherein the filter valve prevents unwanted waste and objects from entering the channel (6104).

19. The system according to claim 18, characterized in that: An impeller (6105) is installed after the filter valve (6109) to help and enhance the intake of color substances and control the amount of color substances drawn into the centrifugal channel (6104).

20. The system according to claim 2, characterized in that: The inner wall of the channel surrounding the centrifugal motor is covered with a ceramic coating to prevent pigment from adhering to the inner side of the channel wall.

21. The system according to claim 2, characterized in that: In the embossing section, the printing material is passed through a UV light source (613) by means of a cylinder (612) of the powder pigment transfer and distribution system (610) that follows the embossing section, and then a series of joining cylinders (609) pass the printing material through multiple heaters (614, 605) and a set of hot air dryers (606, 607).

22. The system according to claim 1, characterized in that: In the holographic pattern printing section (200), a UV inkjet printed pattern is printed using at least one digital inkjet printhead and computer commands, and the printed pattern is dried using at least one UV light source (207).

23. The system according to claim 22, characterized in that: The pattern used for holographic printing is formed by the pressure of at least one roller (210) on the printing material (204) and the transfer of a roll of holographic foil (205) to the wet portion of the UV ink on the material.

24. The system according to claim 1, characterized in that: An invisible printing pattern is printed using at least one inkjet head, the invisible printing pattern being visible on a printing material (204) under UV light, and the invisible printing pattern is dried using at least one UV dryer (303).

25. The system according to claim 1, characterized in that: The phosphorus and fluorescent UV inks are printed on the printing material (204) using at least one printhead in the fluorescent printing section, and the phosphorus and fluorescent UV inks are dried by at least one UV dryer (306).

26. The system according to claim 1, characterized in that: The security design is printed on the printing material (204) using at least one inkjet head (308) with two additional colors and an additional head with light blue and magenta, and then the design is dried by at least one UV dryer (309).

27. The system according to claim 1, characterized in that: The varnish coating is applied to the printing material (204) using a cylindrical printing system (402), and the UV varnish is dried using at least one UV dryer (406), while the water-based varnish is dried using at least one hot air dryer (408, 409) and at least one infrared drying air system (410).

28. The system according to claim 27, characterized in that: The varnish coating section (400) further includes a copper roller with a chromium coating (403), which is immersed in a tray containing varnish and antibacterial material (405) and performs material transfer from the tray to the anilox roller (402).

29. The system according to claim 28, characterized in that: The uniformity of the coating varnish and antibacterial varnish on the copper roller of the chromium coating (403) is achieved by a blade (404) installed in the material tray.

30. The system according to claim 28, characterized in that: At least one hot air dryer (408, 409) dries varnish containing antibacterial material.

31. The system according to claim 1, characterized in that: It also includes an OVI variable ink printing unit with a rotary screen printing unit (501), wherein the rotary screen printing unit uses a rotating cylinder of stencil printing technology (503) and a master making system (502) to print a pattern received from a computer onto overlapping paper and a polymer master (506) and fix the polymer master to the surface of the cylinder (509).

32. The system according to claim 31, characterized in that: The OVI variable ink printing unit further includes a doctor blade (508) that uses pressure to pass ink through the master and transfer it onto the material (204).

33. The system according to claim 32, characterized in that: OVI variable inks are further equipped with a hot air dryer (510).

34. The system according to claim 1, characterized in that: In the conveying section (700), at least one infrared hot air dryer (701) is used to react nanoscale pigments with the material (204) and create embossed printing with controllable thickness.

35. The system according to claim 1, characterized in that: At least one cold air blower (703) blows dry and cool air onto the surface of the printed material (204).

36. A process for continuously printing anti-counterfeiting features on securities materials, characterized in that: All of the following steps are performed within a single system: Step 1: A printing material enters the securities printing system via a feeder. Step 2: A UV ink pattern is printed on the printing material by at least one digital inkjet unit and dried together with the holographic foil under a UV light source. Step 3: Print at least one ambient light invisible ink pattern, at least one phosphor ink pattern, and a main background pattern using at least three inkjet units. Step 4: Using a cylindrical printing system, the nano-coating material from the water-based substance is coated onto the printing material. Step 5: Apply a digital screen printing system to perform OVI inkjet printing. Step 6: After the UV ink pattern is printed by the inkjet unit, the powder pigment of the embossed pattern is applied to the printing material through an air transport and distribution system, and then fixed by cold and hot air respectively. Furthermore, steps 1 through 6 are all controlled by the operator using a computer system.

37. The process according to claim 36, characterized in that: The transfer and distribution of the powder pigment is provided by an airflow generated by a centrifugal system, which provides the color material through a turbine into at least one main nozzle equipped with at least one pressure cut-off impeller, and then through the main nozzle into at least one second nozzle, and then discharged onto the surface of the printing material.

38. The process according to claim 37, characterized in that: Non-adherent pigments on the printing material in the non-printing drying section are brushed off with at least one pair of soft brushes, and the pigments are brought back into the printing cycle for suspension by the suction of a centrifugal system and airflow from at least one nozzle.

39. An embossed printing portion of a system for printing documents and security paper, the embossed printing portion comprising: At least one UV inkjet printhead; and An embossed pattern powder pigment transfer and distribution system designed to use airflow to transfer pigment to the surface (204) of a printing material and create at least 16 million colors by combining four primary colors.

40. The embossed printing portion as described in claim 39, characterized in that, The airflow is formed by a centrifuge system, which includes a centrifuge motor (6103) that provides intake and exhaust air to transfer the colored pigment through a channel (6104) into a chamber below the centrifuge (6107) and then to a turbine (6118).

41. The embossed printing portion as described in claim 40, characterized in that, The turbine (6118) includes a box (6142) with a turbine impeller (6136), an inlet (6117) embedded in the top of the turbine (6118) for use as an inlet for pigment, and an outlet (6138) for use as an outlet for pigment, through which the dye falls into at least one conical tank (6106).

42. The embossed printing portion as described in claim 41, characterized in that, At least one nozzle is installed in the conical tank (6106) for smoothly distributing dye onto the surface of the printing material, wherein the color material falling from the turbine (6118) is directed by the wall of the first nozzle (6140) to the outlet of the first nozzle.

43. The embossed printing portion as described in claim 42, characterized in that, Each of the first nozzles has at least one pressure cut-off device (6112), wherein the color material is mixed together by its rotational motion and then uniformly ejected from the first nozzle outlet (6113) on the surface of the printing material.

44. The embossed printing portion according to claim 43, characterized in that: The colored material enters at least one second-stage nozzle (6114) after passing through the first nozzle (6113).

45. The embossed portion according to claim 44, characterized in that: The embossed printing portion (600) has at least one inkjet printhead (602) that prints a pattern on the printing material before dispensing powder pigment from a second-stage nozzle (6114) to cause the powder color substance to adhere to a wet portion of the printing material (204).

46. ​​The embossed printing portion according to claim 41, characterized in that: The tip of the turbine impeller (6136) is tangentially mounted to the inner wall of the turbine housing (6141) so that, during the circulation of the turbine impeller (6136), the pigment is retained between the impeller and the inner wall (6141) of the housing.

47. The embossed portion according to claim 39, characterized in that: The perforated cylinder (612) fixes the printing material (204) in the desired position by means of vacuum force.

48. The embossed portion according to claim 47, characterized in that: Multiple plates are mounted on the surface (612) of the perforated cylinder, at least one vibrator (6115) is mounted on the surface, and the vibrator generates vibration on the plates (6116) and the printing material, causing the pigment to be evenly distributed to all wet areas of the printed pattern.

49. The embossed portion according to claim 45, characterized in that: At least one pair of soft brush rollers (6108) are mounted next to at least one second-stage nozzle (6114), wherein air intake between the pair of soft brush rollers is configured to separate excess color material from the printing material (204) as the pair of soft brush rollers brush.

50. The embossed printing portion according to claim 49, characterized in that: A channel for an air pressure and air separator (6111) is installed on the upper part of a pair of soft brush rollers (6108), which guides the blown air to a plurality of vertical channels (6127) and then to a plurality of vertical nozzles (6122).

51. The embossed printing portion according to claim 50, characterized in that: At least one truncated square cone (6119) is mounted on the tip of each of the vertical nozzles, wherein at least one of the truncated square cones is inclined to the axis of the vertical nozzle.

52. The embossed printing portion according to claim 50, characterized in that: At least two blow nozzles (6122) have been installed on each pair of soft brush rollers (6108).

53. The embossed portion according to claim 50, characterized in that: At the connection between the vertical channel (6127) and the nozzle (6122), each nozzle is equipped with at least one solenoid valve (6121) to open the path of the nozzle as the printing material (204) passes through the pair of soft brush rollers (6108).

54. The embossed printing portion as described in claim 53, characterized in that: The solenoid valve (6121) receives commands from at least one optical sensor (6130).

55. The embossed portion according to claim 50, characterized in that: The air blown into the channel is supplied by the bellows (6110).

56. The embossed printing portion according to claim 40, characterized in that: A filter valve (6109) is installed at the inlet of the channel around the centrifugal fan, wherein the filter valve prevents unwanted waste and objects from entering the channel (6104).

57. The embossed printing portion according to claim 56, characterized in that: An impeller (6105) is installed after the filter valve (6109) to help and enhance the intake of color substances and control the amount of color substances drawn into the centrifugal channel (6104).

58. The embossed printing portion according to claim 40, characterized in that: The inner wall of the channel surrounding the centrifugal motor is covered with a ceramic coating to prevent pigment from adhering to the inner side of the channel wall.

59. The embossed printing portion according to claim 39, characterized in that: In the embossing section, the printing material is passed through a UV light source (613) by means of a cylinder (612) of the powder pigment transfer and distribution system (610) that follows the embossing section, and then a series of joining cylinders (609) pass the printing material through multiple heaters (614, 605) and a set of hot air dryers (606, 607).

60. A process for printing security features on a printing material using the embossed printing portion as described in claim 40, characterized in that, The process includes the following steps: i. An airflow is formed by a centrifugal system, wherein the centrifugal system includes a centrifugal motor, an intake side, an exhaust side, and a channel connecting the intake side and the exhaust side around the centrifugal motor, wherein the airflow flows from the intake side through the channel to the exhaust side; ii. Conveying the powdered pigment in the airflow through the channel; iii. The airflow from the blow-out side is directed into the space located below the centrifugal motor and the inlet of the turbine, which has multiple impeller blades; iv. Separate the powder pigment from the airflow and pass the separated powder pigment through the turbine outlet located at the bottom of the turbine by means of the impeller blades, so that the separated powder pigment falls through the outlet and into a conical can containing multiple nozzles. v. Supplying printing material to the surface of a vacuum cylinder, wherein the printing material comprises a wet printed pattern on its side opposite to the vacuum cylinder, wherein the wet printed pattern has been produced by means of at least one UV inkjet printhead. vi. By using multiple nozzles to dispense powdered pigment onto the surface of the printing material, the powdered pigment is adhered to the wet printed pattern; as well as vii. Excess powder pigment that is not adhered to the wet printed pattern is removed by means of at least a pair of soft brush rollers, and the brushed-off powder pigment is recycled and reused by means of the suction side of the suction centrifugal system.

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