CN109177490B

CN109177490B - Ink supply system, printing machine comprising ink supply system and printing method

Info

Publication number: CN109177490B
Application number: CN201811032711.1A
Authority: CN
Inventors: 樊建建; 樊鹏; 李尧; 贾东光; 姜玉亮
Original assignee: BEIJING WANYANG SECURITY TECHNOLOGY CO LTD
Current assignee: BEIJING WANYANG SECURITY TECHNOLOGY Co.,Ltd.
Priority date: 2018-09-05
Filing date: 2018-09-05
Publication date: 2020-10-30
Anticipated expiration: 2038-09-05
Also published as: WO2020048202A1; CN109177490A

Abstract

The invention provides an inking system for a printing press comprising a plate cylinder and an impression cylinder. The inking system comprises more than two monochromatic cylinders and corresponding ink transfer and duct rollers, and also comprises a color collecting cylinder device which comprises at least one first color collecting cylinder, at least one second color collecting cylinder arranged separately from the first color collecting cylinder, and a color collecting cylinder belt wound on the first and second color collecting cylinders, wherein the color collecting cylinder belt can be contacted with a plate cylinder of the printing press by means of the first color collecting cylinder and contacted with the monochromatic cylinders by means of the second color collecting cylinder; and the color-collecting cylinder belt is operable to transfer ink from the monochrome cylinder to the plate cylinder of the printing press as the first and second color-collecting cylinders rotate. The invention also relates to a printing press comprising the ink supply system, the use of the ink supply system in a printing press and a printing method.

Description

Ink supply system, printing machine comprising ink supply system and printing method

Technical Field

The invention belongs to the technical field of printing, and particularly relates to an ink supply system for a printing machine, the printing machine comprising the ink supply system, the use of the ink supply system in the printing machine and a printing method.

Background

As is known, rainbow printing is a one-plate multicolor printing process, which means that an ink fountain is divided into a plurality of parts by color separation sheets, then inks with different colors are respectively put in the parts, the inks are distributed by an ink distributing roller after being discharged, the adjacent inks with different colors are mutually kneaded together to form a transitional color, the inks are transmitted to a printing plate, printed patterns are like rainbow, the colors are saturated, and the effect is better than that of four-color dot points. Said another way, the main tone or background of the pattern is composed of different colors, but the color change of the lines or images is gradually transited without obvious boundary, like the gradual transition of rainbow colors of seven colors of sky, so called rainbow printing.

With the development of anti-counterfeiting printing technology, rainbow printing can be realized by a computer code-spraying printing method in the market, the rainbow effect is beautiful at a glance, but the transition color can be clearly seen under a magnifying glass of more than 8 times, ink-spraying points of different colors in the transition color can be easily identified, the product is finished by adopting ink-spraying printing, and burrs are generated in the vertical direction of lines. Especially, when the fineness of the printed lines is 0.1mm, even more, when the fineness of the printed lines is less than or equal to 0.05mm, the computer ink-jet printing is difficult to complete. The rainbow printing effect is difficult to realize by a multi-color overprinting method, the accurate positions of the color-separating sheets in the ink fountain are difficult to see on a printed product, and a counterfeiter is difficult to determine the spacing of the color-separating sheets even by the rainbow printing method, so that the counterfeiting difficulty is increased. If the rainbow printing process is adopted on large-area shading, the anti-counterfeiting effect is more obvious. Such as the front and/or back shading of the RMB, the front and/or back shading of the second-generation ID card, and the rainbow printing technology is applied. However, the rainbow printing process can only be applied longitudinally, and can not be applied partially or in an arc or a circle.

In order to overcome the defects that the rainbow printing process can only be longitudinally applied and can not be locally applied or in an arc shape or a circular shape, improve the anti-counterfeiting strength of the rainbow printing technology and increase the counterfeiting difficulty, the inventor has completed the invention through extensive and intensive research and a large number of experimental experiments.

Disclosure of Invention

The invention aims to: an ink supply system for a printing press is provided that overcomes at least one of the above-mentioned disadvantages.

The invention is derived on the basis of various wiring printers, and the invention can simultaneously complete various wiring printing and circular rainbow shading printing. The invention comprises a circular rainbow shading gravure wiring printer and/or a circular rainbow offset wiring printer and/or a circular rainbow flexographic wiring printer and/or a circular rainbow letterpress wiring printer and/or a circular rainbow engraving gravure wiring printer, collectively referred to as circular rainbow wiring printers.

The ink supply system, the printing machine and the printing method are suitable for printing processes such as offset printing, flexography, gravure printing, letterpress printing, engraving intaglio printing and the like.

According to one aspect of the present invention, there is provided an inking system for a printing press comprising a plate cylinder, the inking system comprising more than two mono-color cylinders and respective transfer and duct rollers, ink being transferable from the duct roller to the transfer roller and from the transfer roller to the mono-color cylinders, characterized in that the inking system further comprises a collecting cylinder arrangement comprising at least one first collecting cylinder, at least one second collecting cylinder arranged separately from the first collecting cylinder, and a collecting cylinder band wound around the first and second collecting cylinders, wherein the collecting cylinder band is contactable with the plate cylinder of the printing press by means of the first collecting cylinder and with the mono-color cylinders by means of the second collecting cylinder; and the color-collecting cylinder belt is operable to transfer ink from the monochrome cylinder to the plate cylinder of the printing press as the first and second color-collecting cylinders rotate.

In particular, the inking system may further comprise an ink distribution device arranged between the first and second color-collecting cylinders, which may comprise at least one ink distribution roller contactable with the color-collecting cylinder belt and drivable in rotation by the drive device, such that the two different colors of ink on the color-collecting cylinder belt are kneaded at the contact edge to achieve ink distribution, and a drive device.

Advantageously, the drive means may comprise a motor, an output shaft of which may output a drive force to rotate the distribution roller.

Advantageously, more than two drives may be provided, each drive being capable of driving in rotation one or more distribution rollers simultaneously.

Advantageously, the distribution roller may be arranged with its longitudinal central axis parallel to the collecting cylinder belt surface, and the distribution roller may be driven by the drive means to rotate about an axis perpendicular to the collecting cylinder belt surface.

Advantageously, the drive means themselves can also be driven to run synchronously with the collecting cylinder belt.

Advantageously, the ink distribution device may further comprise a track, and the drive means may be arranged to be able to run along the track.

According to another aspect of the invention, there may be provided a printing press comprising an ink supply system according to the preceding. The printer may be a wiring printer, such as an offset wiring printer or a flexographic wiring printer or a letterpress wiring printer or an intaglio wiring printer. The gravure-wiring printer may be a gravure-wiring printer or an engraved gravure-wiring printer.

According to a further aspect of the invention there may be provided a use of an ink supply system according to the preceding in a printing press.

According to a further aspect of the present invention, there is provided a printing method using the printing machine according to the foregoing, which may include the steps of:

a) transferring the ink to an ink transfer roller through an ink duct roller and then to a monochrome roller through the ink transfer roller;

b) transferring the ink to a color collecting drum belt of a color collecting drum device through a monochrome drum;

c) carrying out ink evening operation on the ink on the color collecting roller belt by using an ink evening device; and

d) the homogenized ink is transferred to a plate cylinder for printing operations.

Advantageously, said step c) may comprise forming the layer of ink with a circular rainbow pattern after the levelling operation.

Advantageously, said step d) may comprise covering or filling at least one line or pattern of dots or dots in the pattern on the plate cylinder with two or more inks of different colours.

Drawings

The ink supply system of the invention, the printing press comprising the ink supply system and the technical solution of the use of the ink supply system in the printing press are described in the embodiments described in detail below with reference to the drawings.

Wherein:

FIG. 1 is a schematic view of a gravure link printer including one particular embodiment of an ink supply system according to the present invention;

FIG. 2 is a schematic view of an offset flexographic printing press including one particular embodiment of an ink supply system according to the present invention;

FIG. 3 is a schematic view of an engraved intaglio line printing press including one particular embodiment of an ink supply system according to the present invention;

FIG. 4 is a schematic view of a flexographic wiring press including one embodiment of an ink supply system according to the present invention; and

fig. 5 is a schematic view of a letterpress line printer including one specific embodiment of an ink supply system according to the present invention.

Detailed Description

Referring to fig. 1, the gravure wiring printing press 1_1 may include a printing paper feed mechanism 9 and a paper delivery mechanism 10, a plate cylinder 2, an impression cylinder 3, and the like. A plate multicolor ink supply system 100 having a color collecting cylinder device 4 in contact with the plate cylinder 2; two or more

monochrome cylinders

5a,5b,5c are provided around the color-collecting cylinder device 4; the ink is transferred from the duct rollers 7a,7b,7c to the

ink transfer rollers

6a,6b,6c, and the

ink transfer rollers

6a,6b,6c are transferred to the

monochrome cylinders

5a,5b,5c, respectively. The first monochrome cylinder 5a, the second monochrome cylinder 5b, and the third monochrome cylinder 5c transfer inks of different colors to a color collecting cylinder belt 4-3 on the color collecting cylinder device 4, respectively, and the color collecting cylinder belt 4-3 is, for example, a blanket. After the ink is uniformly distributed on the color collecting roller belt 4-3 by a rotary ink distributing roller 11-1 in an ink distributing device 11, an ink layer with a circular rainbow effect is formed, and then the ink with the circular rainbow effect is transmitted to the printing plate roller 2, so that at least one line in the pattern on the printing plate roller 2, or the pattern formed by points and lines, or the pattern formed by points is covered or filled by the ink with two or more different colors, and the ink transmission process is completed; for the gravure printing machine 1-1, the excess ink (ink of the non-image-text part) on the plate cylinder needs to be scraped clean by a scraper of the gravure printing machine, and the scraped clean plate cylinder 2 completes the printing process through the impression cylinder 3; for the engraving intaglio printing press, the redundant ink (the ink of the non-image-text part) on the plate cylinder needs to be wiped clean by a plate wiping system of the engraving intaglio printing press, and the wiped plate cylinder 2 finishes the printing process through the impression cylinder 3; for offset printing presses it is necessary to complete the printing process by means of a blanket cylinder and an impression cylinder 3; for flexographic and letterpress printing machines it is necessary to complete the printing process by means of the impression cylinder 3; obtaining the circular rainbow shading printing pattern.

In the embodiment shown in fig. 1, the color-collecting cylinder arrangement 4 in contact with the plate cylinder 2 comprises two separately arranged color-collecting cylinders 4-1,4-2, which are connected by a color-collecting cylinder belt 4-3, such as a blanket sleeve. It is contemplated by those skilled in the art that the color-collecting roller device according to the present invention may include three, four or more color-collecting rollers separately arranged as long as the concept of the present invention can be implemented.

Further, although three monochrome cylinders, three ink fountain rollers, and three ink transfer rollers are shown in each of fig. 1-5, it will be understood by those skilled in the art that other numbers (e.g., one, two, four, or more) of monochrome cylinders, ink fountain rollers, and ink transfer rollers may be employed.

The evening device 11 also includes a drive means, such as a motor 11-2. Install the rotatory even ink roller 11-1 of motor drive additional on collection look cylinder device 4, use the motor shaft as the rotation of center, even ink roller 11-1 self is along with the rotation when doing the circumference rotation, rotatory motor and collection look cylinder device 4 synchronous operation simultaneously make the printing ink of two kinds of different colours on collection look cylinder device 4 knead at the contact edge, reach even black mesh, form circular rainbow effect, the printing ink more than two kinds of colours that form circular rainbow effect is transmitted simultaneously to plate cylinder 2 by collection look cylinder device 4 again.

The ink distributing roller 11-1 may be arranged such that the longitudinal center axis of the ink distributing roller 11-1 is parallel to the surface of the color-collecting cylinder belt 4-3, and the ink distributing roller 11-1 is driven by a driving device (motor 11-2 in this embodiment) to rotate about an axis perpendicular to the surface of the color-collecting cylinder belt 4-3.

The ink distribution device 11 may also include a track 11-3 along which the motor 11-2 may be driven. The motor 11-2 may be driven to travel along the track by an additional drive system. Such a drive system (which may for example comprise a drive motor) may be known per se.

More than two

single color cylinders

5a,5b and 5c are arranged around the color collecting cylinder device 4, the single color cylinders are rubber rollers or other soft rubber with ink absorption property adhered on the surfaces of the single color cylinders, the single color cylinders respectively transfer ink with different colors to the color collecting cylinder device 4, and the ink supply parts and areas of the single color cylinders correspond to the image-text parts and areas of the plate cylinder 2.

In the printing machine of the full-rotation circular rainbow ink supply system, the circumference of the single-color cylinder bonded by the soft rubber is integral multiple of the circumference of the plate cylinder 2, and the ink supply part of the single-color cylinder corresponds to the pattern part of the plate cylinder 2; in the printing machine of the non-full-wheel rotary circular rainbow ink supply system, the circumference of a monochromatic cylinder (the ink transmission part after the head and the tail of a plate are removed) after the bonding of the soft rubber is the same as the arc length of the plate cylinder 2 of the actual printing area or the length of the plate of the actual printing area, and the ink supply part of the monochromatic cylinder corresponds to the pattern part of the plate cylinder 2; in a full-rotary printing machine with a circular rainbow ink supply system, the size of a color collecting cylinder device 4 is integral multiple of the circumference of a printing plate cylinder 2; in a printing machine (such as an intermittent rotary press) with a non-full-rotary circular rainbow ink supply system, the size of the color collecting cylinder device 4 is the arc length of the plate cylinder 2 with the actual printing area or the integral multiple of the plate length of the plate with the actual printing area; the color-collecting cylinder device 4 operates in synchronism with the plate cylinder 2.

A high-quality circular rainbow printing process can be realized using the circular rainbow ink supply system as an ink supply system of an offset printing press (see fig. 2), or a flexographic printing press, or a letterpress printing press, or a gravure printing press, or an engraving intaglio printing press, or the like.

In consideration of the fact that the ink cannot be transferred cleanly in each ink transfer, a part of ink is left more or less, and color mixing may occur when the next monochrome roller transfers the ink again, a set of ink wiping mechanism 12 (see fig. 1 in detail) is added after the ink is supplied to the plate cylinder 2 by the color collecting cylinder device 4, and the residual ink on the color collecting cylinder device 4 is wiped cleanly after each printing process is completed, so that the next ink transfer process is performed.

The ink wiping mechanism 12 cleans the ink on the color collecting roller device 4 by adopting a mature paper wiping mode or a large cloth wiping mode or a scraper mode in the market, and the cleaning degree is based on that the ink is not mixed when being transferred in the next printing process.

The ink wiping mechanism 12 (see fig. 1 in detail) can wipe off the residual ink on the blanket with a special scraper, which cannot damage the surface of the blanket during wiping.

The ink wiping mechanism 12 (see fig. 1 in detail) can also clean the ink on the color collecting roller device 4 by wiping the plate with paper or large cloth; the ink on the color collecting roller device 4 can also be transferred to the web by adopting a web ink transferring mode, so that the aim of cleaning the ink on the color collecting roller device 4 is fulfilled. The process of these erase mechanisms is well established in the market and will not be described. But it is simplest and most practical to scrape the residual ink on the color-collecting cylinder device 4 by a specially made scraper as described above.

The printed matter after printing passes through a drying mechanism 8 (hot air drying, ultraviolet drying, infrared drying or natural drying), and is collected for later use.

The above-described paper feeding mechanism 9, paper delivery mechanism 10, plate cylinder 2, impression cylinder 3, blanket cylinder 13, ink wiping mechanism 12, printing substrate, ink, and the like may be known per se.

The above-described paper feeding mechanism 9 may be known. In printing, the paper feed mechanism 9 in the above-described various printing processes feeds a substrate to be printed to the printer to perform a printing operation. The substrate to be printed here is a web or a sheet of paper or a film or the like.

The delivery mechanism 10 described above may be known. In printing, the delivery mechanism 10 in the above-described various printing processes collects the printed product after printing by the drying mechanism 8. The delivery mechanism 10 is a collection mechanism for roll paper, sheet paper, film, or the like.

The plate cylinder 2 may be a known hollow plate cylinder or solid plate cylinder for gravure printing, or may be a known hollow plate cylinder or solid plate cylinder or steel plate for gravure printing, and the pattern (plate pattern) on the plate cylinder 2 may be made by a known engraving process, such as laser engraving, electronic engraving, mechanical engraving, etching first and then manual engraving, and the like. The pattern structure on the plate cylinder 2 can be designed in accordance with known pattern structures. The depth of the pattern for the shading printing can be determined according to needs and is generally controlled below 60 microns. The depth of the plate line for the engraving intaglio printing is generally controlled below 200 microns.

The plate cylinder 2 is a PS plate or a flat plate as a plate material for an offset printing press. The plate material for the flexographic printing machine is a resin plate. The plate material for a letterpress printing machine is generally a metal plate material.

The above-mentioned one-plate multicolor ink supply system with the color collecting cylinder device 4 in contact with the plate cylinder 2 is a design principle in one-plate multicolor letterpress printing technology with the color collecting cylinder invented by olov of the saki printing expert in 1897, and the printing technology design principle is used in the ink supply system design technology in the printing machine design process, so that the current one-plate multicolor line printing technology with the color collecting cylinder device 4 in contact with the plate cylinder 2 is formed. A plate-type multicolor gravure wiring printing machine and a printing technique having a color collecting cylinder, a plate-type multicolor dry offset (lithographic printing plate) wiring printing machine and a printing technique having a color collecting cylinder, and a plate-type multicolor engraving gravure wiring printing machine and a printing technique having a color collecting cylinder have also been known by the design principle of olov, and these techniques can be used for banknote printing in various countries.

The known line printing machines are all one-plate multicolor line printing machines with color collecting cylinders (sometimes, a plate cylinder can replace the color collecting cylinder), but none of the line printing machines is a color collecting cylinder device 4 with two color collecting cylinders, a rotary ink distributing roller 11-1 driven by a motor is additionally arranged on the color collecting cylinder device 4, the ink distributing roller 11-1 rotates and also revolves, and the rotary ink distributing roller 11-1 driven by the motor and the color collecting cylinder device 4 consisting of the two color collecting cylinders 4-1 and 4-2 run synchronously.

The printing machine of the circular rainbow ink supply system of the invention is based on a one-plate multicolor letterpress printing technology with a color collecting roller, a one-plate multicolor dry offset printing (flat letterpress) printing technology with a color collecting roller, a one-plate multicolor engraving intaglio printing technology with a color collecting roller and a one-plate multicolor gravure wiring printing technology with a color collecting roller, and the design principles of the printing machine are applied to the design principles of an offset printing machine, a flexible printing machine, a letterpress printing machine, a gravure printing machine or an engraving intaglio printing machine. Such as a one-plate multicolor gravure wiring press having color-collecting cylinders, the color-collecting cylinder assembly 4 shown is formed by adding one color-collecting cylinder to two color-collecting cylinders 4-1,4-2, which are connected by a color-collecting cylinder belt 4-3 (e.g., a blanket) 4-3.

A one-plate multicolor ink transfer system with a color collecting cylinder device 4 contacted with a forme cylinder 2 is characterized in that more than two

monochromatic cylinders

5a,5b and 5c are arranged around the color collecting cylinder device 4, a rotary ink distributing roller 11-1 driven by a motor is additionally arranged on the color collecting cylinder device 4 and rotates by taking a motor shaft as a center, the ink distributing roller 11-1 rotates along with self rotation while rotating in a circle, the motor rotating at the same time and the color collecting cylinder device 4 synchronously run (see 11 in figure 1 in detail), so that two kinds of ink with different colors on the color collecting cylinder device 4 are kneaded at a contact edge to achieve the purpose of ink distribution, a circular rainbow effect is formed, and the color collecting cylinder device 4 simultaneously transfers the ink with more than two kinds of colors forming the circular rainbow effect to the forme cylinder 2 to finish the ink transfer process.

In principle, circular rainbow printing can be performed by arranging two monochrome cylinders around the collector cylinder device 4 in contact with the printing plate. The more monochrome cylinders are provided around the color-collecting cylinder device 4, the higher the accuracy requirement of the printing press.

The color collecting cylinder device 4 is provided with more than two single-

color cylinders

5a,5b and 5c around, the single-color cylinders are rubber rollers or other soft rubber with ink absorption property adhered on the surfaces of the single-color cylinders, the single-color cylinders respectively transmit the ink with different colors to the color collecting cylinder device 4, the ink supply parts and the areas of the single-color cylinders correspond to the image-text parts and the areas of the printing plate cylinder 2, and at least one line in the pattern on the printing plate cylinder 2 or the pattern consisting of the points and the lines or the pattern consisting of the points are filled or covered by the intaglio photographic ink with two or more than two different colors through the color collecting cylinder device 4. If it is intended to realize a circular rainbow printing alone, it can be realized by providing two monochrome cylinders around the color-collecting cylinder device 4. If, at the same time as the circular rainbow printing, also multicolor (such as three colors or four colors or five colors, etc.) ground-line printing is to be realized, it is necessary to arrange around the color-collecting cylinder device 4 two or more single-

color cylinders

5a,5b,5c, of which one part performs the circular rainbow printing and the other part can be used for ground-line printing with the other single-color cylinders. That is, both circular rainbow printing and multicolor shading printing can be done simultaneously. However, the wiring printed portion is not included in the present invention. For details, please refer to: chinese patent No.: 201410355802.4, respectively; chinese patent No.: n201310521745; chinese patent No.: CN 200910242289; chinese patent No.: CN200910084800, etc.

The printing machine of the circular rainbow ink supply system of the invention, the single color cylinder is a rubber cylinder or other soft rubber cylinder with ink absorption, the convex part (ink transmission area) of the soft rubber cylinder corresponds to the pattern part of the plate cylinder 2 through the color collecting cylinder device 4, and is more than or equal to the pattern part (calculated according to the area) of the plate cylinder 2. The sizes of the areas of the soft rubber bonding parts (which can be calculated by area) on the three single-color rollers are determined by the fact that the inks with more than two different colors do not cross one another.

In the printing machine of the full-rotation circular rainbow ink supply system, the circumference of the single-color cylinder bonded by the soft rubber is integral multiple of the circumference of the plate cylinder 2, and the ink supply part of the single-color cylinder corresponds to the pattern part of the plate cylinder 2; in a printing machine (such as an intermittent rotary press) with a non-full-rotary circular rainbow ink supply system, the circumference of a single-color cylinder (an ink transmission part after removing the head and the tail of a plate) bonded by a soft rubber is the same as the arc length of a plate cylinder 2 with an actual printing area or the same as the plate length of a plate with the actual printing area, and an ink supply part of the single-color cylinder corresponds to a pattern part of the plate cylinder 2; in a full-rotary printing machine with a circular rainbow ink supply system, the size of a color collecting cylinder device 4 is integral multiple of the circumference of a printing plate cylinder 2; in a printing machine (such as an intermittent rotary press) with a non-full-rotary circular rainbow ink supply system, the size of the color collecting cylinder device 4 is the arc length of the plate cylinder 2 with the actual printing area or the integral multiple of the plate length of the plate with the actual printing area; the color-collecting cylinder device 4 operates in synchronism with the plate cylinder 2.

For a gravure printing machine of a circular rainbow ink supply system, gravure ink used is not gravure ink in a general sense but is gravure ink equivalent to engraved gravure ink, which has been patented by national invention (patent No. ZL 200510116933.8; patent No. ZL 200710096314.6). The ink has the remarkable characteristics that:

1. the viscosity of the ink is far less than that of the ink for engraving the intaglio plate, so that the residual ink on the non-image-text part can be conveniently scraped clean by a doctor blade;

2. the consistency of the ink is less than that of the ink of the engraved plate, so that the ink does not flow in the transmission process and is convenient for wiring printing;

3. the acid value of the printing ink is very small, which is beneficial to improving the physical and chemical fastness of the printed matter;

4. the printing ink is suitable for instant drying, and when the printing ink is printed at high speed, the printed product is not smeared, the production land for a room is saved, and the production efficiency is improved.

The ink has many features, which are not exemplified here. The ink is also suitable for letterpress printing machines of circular rainbow ink supply systems and flexographic printing machines of circular rainbow ink supply systems.

In the printing machine of the circular rainbow ink supply system of the present invention, after the ink is transferred to the plate cylinder 2, the excessive ink (ink of the non-image-text portion) is scraped off by the doctor blade of the gravure printing machine. And for the engraving intaglio printing press, a plate wiping mechanism of the engraving intaglio printing press is adopted for wiping. For all-wheel presses, steel blades are used for the doctor blade. For non-full-wheel printers or engraved intaglio printing presses, cleaning can only be done by the plate wiping mechanism in the gravure wiring press, see patent nos.: 201410355802.4 content and related content.

In the printing press of the circular rainbow inking system of the present invention, in the case of a gravure printing press, the printing process is performed by scraping the clean plate cylinder 2 through the impression cylinder 3. The impression cylinder 3 for circular rainbow shading printing can be selected from impression cylinder rubber rollers (shore hardness is generally 30-70 degrees) of a commercially known gravure printing machine, and the softer impression cylinder 3 can meet the printing requirements because the pressure between the impression cylinder 3 and the plate cylinder 2 is smaller.

The printed products are collected for later use after passing through a drying mechanism 8 (hot air drying, ultraviolet drying, infrared drying or natural drying), and the hot air drying, ultraviolet drying or infrared drying is a necessary technical link for the circular rainbow shading gravure wiring printer, otherwise, the printed products are mutually bonded, and unnecessary waste is caused (the water-washing of the natural drying of single paper does not smear the engraved gravure printing exception).

The printing method of the printing machine of the circular rainbow ink supply system of the present invention, including the paper feeding mechanism 9, the plate cylinder 2, the ink supply system and the relationship of the circumferences of the cylinders in the ink supply system (including the plate cylinder 2, the color collecting cylinder device 4, the monochrome cylinder, the ink transfer rollers, etc.), the impression cylinder 3, the drying mechanism 8, the paper receiving mechanism 10, etc., has been described above. The anti-counterfeiting technical product printing process needs to be introduced, and how the mechanisms are coordinated to complete the printing process. The printing machine of the circular rainbow ink supply system of the invention is applied to meet the requirements of anti-counterfeiting technical printed products.

The printing machine of the circular rainbow ink supply system of the invention is shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, but the invention is not limited to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, for example, the number of the ink transfer rollers, the ink fountain can be replaced by the anilox roller for ink supply, the water dampening mechanism 14 is added in the case of water offset printing, the plate wiping mechanism is added in the case of engraving intaglio printing, and the like. The key is whether the ink supply system adopts the round rainbow ink supply system.

Referring to fig. 1, with respect to a gravure printing press 1_1, a completely new circular rainbow inking system can be realized by using the one-plate multicolor inking system of the present invention having the color-collecting cylinder device 4 in contact with the plate cylinder 2 as an inking system in the gravure printing press. Gravure printing machines can be used for printing rainbow shadings and also for printing other printed matter with rainbow effects.

Referring to fig. 2, with respect to the offset printing press 1_2, by using the one-plate multicolor inking system of the present invention having the color collecting cylinder device 4 in contact with the plate cylinder 2 as the inking system of the offset printing press, a completely new offset printing press system of the circular rainbow inking system can be realized. The color collecting cylinder device 4 transfers the inks of two or more colors forming a circular rainbow effect to a PS plate (water offset) or a flat plate (dry offset) at the same time, and the inks are transferred onto a printing substrate by the blanket cylinder 13 and the impression cylinder 3, thereby completing the printing process.

In terms of design principle, the design principle of the printing machine of the circular rainbow ink supply system is completely suitable for the design of a circular rainbow shading offset plate wiring printing machine. For the offset printing process, a set of dampening units 14 is added, which may be known per se.

Referring to fig. 3, with respect to the intaglio printing press 1_3, a completely new system of the intaglio printing press with a circular rainbow ink supply system can be realized by using the one-plate multicolor ink supply system of the present invention having the color collecting cylinder device 4 in contact with the plate cylinder 2 as the ink supply system of the intaglio printing press. Engraved intaglio printing presses are not generally used for printing rainbow shading, but may be used for printing other printed matter with rainbow effect that engraved intaglio is capable of printing.

Referring to fig. 4, for the flexographic printing machine 1_4, a completely new flexographic printing machine system of a circular rainbow ink supply system can be realized by using the one-plate multicolor ink supply system of the present invention having the color collecting cylinder device 4 in contact with the plate cylinder 2 as the ink supply system of the flexographic printing machine. Or the ink fountain can be changed into a mesh-line roller, the mesh-line roller directly transfers ink to the monochromatic roller, the monochromatic roller transfers the ink to the color collecting roller device 4, and the rotary ink distributing roller 11-1 driven by a motor on the color collecting roller device 4 distributes the ink and then transfers the ink to the flexographic roller. The consistency of the flexographic ink is based on the fact that the two different colors of ink on the color collecting roller device 4 do not cross color. The other mechanisms (such as the paper feeding mechanism 9, the paper delivery mechanism 10, the drying system, etc.) for the flexographic printing process are unchanged. The printing ink with more than two colors forming the circular rainbow effect is simultaneously transferred to the flexible printing roller by the color collecting roller device 4, and is printed on a printing substrate by the flexible printing roller through the impression roller 3, so that the printing process is completed. Flexography is a light press printing process, so the entire flexographic printing press design is to conform to the flexographic printing process.

In terms of design principle, the design principle of the printing machine of the circular rainbow ink supply system is completely suitable for the design of the circular rainbow flexible plate wiring printing machine.

Referring to fig. 5, with regard to the relief printing press 1_5, a completely new relief printing press system of a circular rainbow ink system can be realized by using the one-plate multicolor ink supply system of the present invention having the color collecting cylinder device 4 in contact with the plate cylinder 2 as the ink supply system of the relief printing press. The printing ink with more than two colors forming the circular rainbow effect is simultaneously transferred to the letterpress cylinder by the color collecting cylinder device 4 and directly printed on a printing substrate by the impression cylinder 3, thereby completing the printing process.

In terms of design principle, the design principle of the printing machine of the circular rainbow ink supply system is completely suitable for the design of the circular rainbow shading letterpress wiring printing machine.

In summary, the printing press of the circular rainbow inking system of the present invention is a single-plate multicolor inking system having a color collecting cylinder device 4 in contact with a plate cylinder 2; two or more monochrome cylinders 5a,5b,5c are provided around the color-collecting cylinder device 4; after being distributed by the rotary distributing roller 11-1 on the color collecting roller device 4, more than two colors of ink forming a circular rainbow effect are transferred to the plate cylinder 2 by the color collecting roller device 4 (the plate cylinder can be a flexible plate cylinder and/or an offset plate cylinder and/or a relief plate cylinder and/or a gravure plate cylinder and/or an engraving plate cylinder), so that at least one line in the pattern on the plate cylinder 2 or the pattern consisting of points and lines or the pattern consisting of points is filled or covered by the ink of two or more than two different colors; for gravure printing, the excess ink (ink of the non-image-text part) is scraped clean with a doctor blade of the gravure printing press, and the scraped clean plate cylinder 2 completes the printing process through the impression cylinder 3; for flexographic and/or letterpress printing, the plate cylinder 2 completes the printing process by means of the impression cylinder 3; for offset printing, the plate cylinder 2 completes the printing process by means of the blanket cylinder and impression cylinder 3; for the engraving intaglio printing, the plate cylinder 2 needs to be wiped clean by a plate wiping system, and then the printing process is finished through the impression cylinder 3; a circular rainbow printed pattern was obtained.

The printing machine of the circular rainbow ink supply system is suitable for a shading printing process or other printing processes needing rainbow effect.

The practice of the present invention is not limited to the exemplary embodiments described above, but is intended to be exemplary only. For example, the shape, number, and/or location of the various types of cylinders, distribution rollers, and/or motors in the exemplary embodiment should be understood to be for example only. It should also be noted that features of the separately described exemplary embodiments of the invention may be combined with each other to form different combinations.

Claims

1. Inking system for a printing press comprising a plate cylinder, said inking system comprising more than two monochrome cylinders and respective transfer and duct rollers, ink being transferable from the duct roller to the transfer roller and from the transfer roller to the monochrome cylinders, characterized in that it further comprises a collecting cylinder arrangement comprising at least one first collecting cylinder, at least one second collecting cylinder arranged separately from the first collecting cylinder, and a collecting cylinder band wound on the first and second collecting cylinders, wherein the collecting cylinder band is contactable with the plate cylinder of the printing press by means of the first collecting cylinder and with the monochrome cylinders by means of the second collecting cylinder; and the color-collecting cylinder belt is operable to transfer ink from the monochrome cylinder to the plate cylinder of the printing press as the first and second color-collecting cylinders rotate.

2. An inking system according to claim 1, wherein the inking system further comprises an ink distribution device disposed between the first and second colour-collecting cylinders, the ink distribution device comprising at least one ink distribution roller contactable with the colour-collecting cylinder belt and drivable in rotation by the drive device such that two different colours of ink on the colour-collecting cylinder belt are kneaded at the contact edge to effect ink distribution.

3. An ink supply system according to claim 2, wherein the drive means includes a motor, an output shaft of the motor outputting a drive force to rotate the distribution roller.

4. An inking system according to claim 2 or 3, wherein there are two or more drives, each driving rotation of one or more distribution rollers simultaneously.

5. An inking system according to claim 2 or 3, wherein the distribution roller is arranged with its longitudinal central axis parallel to the collecting cylinder belt surface and is driven by a drive to rotate about an axis perpendicular to the collecting cylinder belt surface.

6. An inking system according to claim 2 or 3, in which the drive means is also driven to operate in synchronism with the colour-collecting cylinder belt.

7. An ink supply system according to claim 6, wherein the levelling means further comprises a track along which the drive means is arranged to be able to run.

8. A printing press comprising an ink supply system according to any one of claims 1 to 7.

9. The printing press of claim 8, wherein the printing press is an offset or flexo or letterpress or intaglio wiring press, wherein the intaglio wiring press is a gravure or engraved intaglio wiring press.

10. Use of an ink supply system according to any one of claims 1 to 7 in a printing press.

11. A printing method using the printer according to claim 8 or 9, the printing method comprising the steps of:

12. The printing method according to claim 11, wherein said step c) comprises forming an ink layer having a circular rainbow pattern after the inking operation.

13. A printing method as claimed in claim 11 or 12, wherein step d) comprises covering or filling at least one line or pattern of dots or dots of the pattern on the plate cylinder with two or more different colour inks.