RU2267407C1 - Method of creating effect at offset or type-offset planetary construction press - Google Patents

Abstract

FIELD: printing processes to produce particular kinds of printed work.

SUBSTANCE: different color paint is applied to printing plate rolled up with paint within limits of definite pattern of mask.

EFFECT: improved quality of printing.

6 cl, 1 dwg

Description

The invention relates to printing, and in particular to a printing method known as "Oryol printing", and can be used for printing securities, as well as for printing other multi-color printed products requiring protection.

The main advantage of using the Oryol effect is the perfect combination of differently colored line elements, which is unattainable when using offset machines of both sectional and planetary construction.

The multi-color Oryol image is a continuously colored line with a transition of colors. By the transition of the colors of the line, we mean the coloring of its various sections in the corresponding colors, while the boundary of the transition of the line section of one color to the line section of another color is characterized by the absence of mixing zones for these colors. Technically, the method of Oryol multi-color printing is based on rolling up a prefabricated printing form using colorful patterns. Thus, the essence of this print consists in the formation of individual colorful zones on color-separated forms-templates, their transfer to the prefabricated form and from there to the sealed surface. All colorful patterns, when applying their multi-colored pattern to the prefabricated printing form, completely cover the entire area of the picturesque field of the prefabricated form.

A known method of forming a multi-color background pattern in Oryol printing (patent SU 1743341, class B 41 F 11/00, 06/23/92), characterized by the use of colorful patterns, which are dies of various configurations, as well as the absence of overlapping zones when transferring paints from the surfaces of the patterns on the prefabricated form.

One of the disadvantages of the existing method of forming a multi-color background pattern in Oryol printing is the lack of a mixing zone between two sections of different colors of paint.

The absence of mixing zones of two colors in the Oryol printing press does not allow a smooth transition of color from one to another.

A known method of Oryol printing, including the rolling of certain sections of a prefabricated printing plate of a plate cylinder with two or more different colors, the formation of a zone for combining paints with a smooth transition of colors and transferring a colorful image directly to paper or an intermediate offset cylinder (patent RU 2143344, B 41 M 3 / 14, 1999 - prototype).

Using the known method does not allow to obtain a sufficient number of color gamut options obtained in the zone of a smooth transition of paints, which reduces the security of securities.

The technical result of the invention is the expansion of the functionality of offset and type-offset machines of planetary construction, as well as obtaining the Oryol image with increased areas of mixing colors. The proposed method will allow you to get in one run on any machine of planetary construction, for example on Super Simultan 212 and 312 machines, a two-sided image with the Oryol effect, which has sharp and / or smooth colorful borders in various combinations.

This technical result is achieved by the fact that in the method of obtaining the Oryol effect on an offset or type-offset machine of planetary construction, which consists in transferring to a printing plate previously rolled up with one ink, another ink within a certain pattern of patterns by means of a transmission link with a circumference that is a multiple of the image step, and executed in the form of a system of intermediate rollers and cylinders having a rigid kinematic connection with the knurling rollers involved in the paint transfer.

The method involves giving one or more of the intermediate rollers or several of the intermediate rollers or cylinders an axial reciprocating movement to create smooth colorful borders in the axial direction and / or giving one or more of the intermediate rollers or cylinders a cyclic pulsating movement around the circumference of the printing plate to create smooth colorful borders in the direction of rotation of the plate cylinder.

It is preferable to use a raster template to increase the smoothness of the colorful border.

Advantageously, two intermediate template rollers having mutual agreement are used.

The method provides for the presence of gaps in the places of those sections of colorful borders that need to be left sharp in order to get a combination of smooth and sharp colorful borders on one print on the second template roll.

The method in accordance with the present invention is carried out by the device and allows to obtain a printed image.

The essence of the method of obtaining the Oryol effect on an offset or type-offset machine of planetary construction is illustrated in the drawing, which shows a diagram of one of the options for constructing a printing apparatus;

The method of obtaining the Oryol effect is implemented according to one of the possible schemes, in which the paint supplied to the lower plate cylinder 1 by a rolling roller 2 is removed from the last template roller 4 having engraved template elements. Through the rigid kinematic connection of the described group, the paint in the form of repeating elements is transferred from the template roller 4 through the transfer roller 5 and the roller 6 to the knurling roller 7 of the upper plate cylinder 8, on which it paints parts of the form defined by the configuration of the repeating elements.

A constructive solution may provide the ability to adjust the contrast of the color border. To do this, one or more of the intermediate rollers (4, and / or 5, and / or 6) must be rolled, that is, have axial displacement and / or circumferential pulsation.

To further increase the smoothness of the colorful border, a raster template is used.

In addition, to obtain a combination of smooth and sharp colorful borders on one print, it is necessary to use two template rollers, for example 4 and 6, while the second template roller should contain gaps in places of those sections of the colorful borders that must be left sharp.

All rollers and plate cylinders of the circuit must have a circumference that is a multiple of the value called step of template 3 (see drawing).

Thus, the invention increases the functionality of offset or type-offset machines of planetary construction, and also allows you to get the Oryol image with increased areas of mixing colors.

Industrial applicability.

The invention can be used in the manufacture of multicolor printed products requiring protection.

Claims (5)

1. A method of obtaining the Oryol effect on an offset or type-offset machine of planetary construction, which consists in transferring to a printed form previously pre-rolled with one ink a different ink within a certain pattern of patterns, by means of a transmission link with a circumference that is a multiple of the image step, and made in the form of a system of intermediate rollers and cylinders having a rigid kinematic connection with the knurling rollers involved in the paint transfer. 2. The method according to claim 1, characterized in that they give one or more of the intermediate rollers or cylinders an axial reciprocating movement to create smooth colorful borders in the axial direction and / or give one or more of the intermediate rollers or cylinders a cyclic pulsating movement along the circumference of the printing plate to create smooth colorful borders in the direction of rotation of the plate cylinder. 3. The method according to claim 1, characterized in that a raster template is used. 4. The method according to claim 1, characterized in that use two intermediate template rollers having mutual agreement. 5. The method according to claim 1, characterized in that the second template roller contains gaps in the corresponding places of the areas of colorful borders.