JPS62234935A - Registering target for printing - Google Patents

Abstract

PURPOSE:To provide registering targets for printing with which a concrete numeric value of a registering error can be confirmed visually by juxtaposing many stripes having predetermined width with intervals equal to the width of the stripe so as to constitute a measuring part than varying the width and the interval stepwise so as to form several sets of measuring parts. CONSTITUTION:The widths of stripes and the intervals are set in the manner that (a) for a measuring part P1; (2a) for a measuring part P2; (4a) for a measuring part P3, and so on. If the registering error equals to the basic dimension or (a), only the measuring part P1 having the width of strip[e and the interval which equal to (a) is collapsed to become a solid printing condition while other measuring parts are brought to such a state where a blank is left. Consequently, a concrete wrong guess numeric value [in this case, a registering error of (a)] can be confirmed at a glance without enlarging by a magnifier. When the registering targets are overlapped, only the measuring part P2 having the width of stripe and the interval of (2a) has been brought into a solid printing state whereby the state where the registering error of (2a) exists in the right and left directions of the drawing can be confirmed visually in the form of a concrete numeric value.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to printing quality control, and in particular to a printing register target that allows the registration accuracy to be visually and quantitatively understood.

(Prior Art) Registration accuracy is one of the characteristic factors that determine printing quality.

This registration accuracy refers to the degree to which the drawing line is shifted in the vertical or horizontal direction in (1) a single printing unit or (2) between multiple printing units.

In the case of (■) above, when printing is performed many times on a monochrome machine with only a single printing unit, or on a specific printing unit of a multicolor machine, how much is the registration variation among a large number of printed papers? This variation is caused by the printing machine itself, and is therefore a very important factor in inspecting the basic performance of the printing machine.

In addition, in the case of (■) above, for example, among the four printing units of a four-color machine, it is to what extent the registration of the subsequent printing unit is misaligned with respect to a specific printing unit, and it is necessary to eliminate this misregistration. In order to do this, the mechanism related to registration accuracy in the printing press must be modified.

By the way, the registration accuracy required for modern printing presses is 2/
It is desired to reduce the time and effort required to inspect the registration accuracy in very small orders such as 100 mm, and furthermore, it is necessary to reduce the amount of waste paper necessary for register checking as much as possible.

Conventionally, as a registration target used to check registration accuracy, + marks (so-called register marks) are printed in the margins of paper, and the amount of deviation between the + marks is magnified with a magnifying glass. It was measured with a scale.

However, when using the registration target of the + mark method, it takes a lot of time and effort to check, and above all, the basic drawback of the + mark method is that the + marks are not connected to each other in order to decipher the amount of deviation. The problem is that they must be brought close together.

There is a technique disclosed in U.S. Patent No. 4,273,045 as an improvement to the registration target of the + mark method, but since this technique is basically just a + mark method, it is not possible to use the above-mentioned circular reading system. It also has the disadvantage that the amount of deviation cannot be seen unless magnified with a magnifying glass.

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an improved printing register target.

Another object of the present invention is to provide a printing register target that allows the user to visually determine the specific numerical value of the register error.

Another object of the invention is to save working time and effort;
- To provide a printing registration target that allows users to recognize registration errors by looking at it.

In order to achieve the above-mentioned purpose, in the printing register target according to the present invention, one measurement part is constructed by arranging a large number of filaments of a constant width at the same intervals as the line width, Several sets of measurement parts are formed by changing the line width and spacing in stages, and these sets of measurement parts are placed side by side.

As a result, the measurement part corresponding to the misregistration is completely filled out during inspection, so that the specific numerical value of the misregistration can be visually recognized. Therefore, it is possible to save time and effort, and to check the registration error accurately, which greatly contributes to the control of print quality.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing one embodiment of the register target according to the present invention, which is an enlarged drawing of the register target used in actual printing, and FIG. It is a partially enlarged view of the figure.

Since the register target according to the present invention is the pattern itself shown enlarged in the drawing, the line width (line width) is the same as the pattern shown in the drawing. A large number of measurement parts are arranged in parallel with the same spacing (shown as blanks in the drawing) to form one measurement part.

To explain this measurement part, the minimum order for checking registration accuracy is -1, for example 2/100.
A group in which mm is selected as the basic dimension a and the line width and interval are set to this a is one measurement part.

In FIGS. 1 and 2, the line width and spacing of measurement part P1 are 31 measurement parts), and that of P2 is 2a.

Measurement bar) Several sets of measurement parts Pi, P2. P3...- is formed.

That is, the line width and interval steps are integral multiples of the basic dimension a,
Preferably, it is an even number of times, and the order of juxtaposition of the measurement parts is the order of the line width and interval steps (
a, 2a, 4a...a).

Furthermore, the juxtaposition direction of each measurement part is the horizontal direction of the drawing, whereas the filament is the vertical direction of the drawing, and therefore, both directions are at right angles to each other.

However, the juxtaposition direction of the measurement parts and the direction of the filament may be the same direction, as shown in another embodiment of FIG.

The register target according to the present invention is created at the edge of the plate, and is therefore printed on the margin of the paper.

Next, to explain how the register target according to the present invention is used, when printing a large number of sheets of paper continuously in a single printing unit of a multicolor machine, the plate with the register target according to the present invention is attached. Before the ink in the printed printing unit dries, it transfers with the paper to the blanket of the subsequent printing unit (no plate or ink is attached), and therefore, the residual ink is overprinted on the next line of paper that immediately follows. I will do it. Therefore, if there is a registration error in the printing of the preceding and following lines of paper that are successively printed,
A printing unit with a plate and a subsequent printing unit without a plate print register targets that are offset from each other on a sheet of paper.

In other words, simply by attaching a plate to a single printing unit and printing continuously, the register targets are overlaid and it is possible to check for register errors. This registration error is caused by the mechanical precision of the printing unit itself, and is closely checked during manufacturing because it is related to the basic performance of the printing press.

To explain the effects of the register target according to the present invention in the above-mentioned usage mode, when the register error is a, which is the same as the basic dimension, as shown in FIG. Only the part P1 is flattened into a so-called flat state, while the other measurement parts remain blank.

Therefore, the specific numerical value of misregistration (in this case, the fact that there is a misregistration error of a in the left-right direction in FIG. 4) can be recognized at a glance without magnifying it with a magnifying glass.

9. As shown in Figure 5, the registration target is overlapping and only the measurement part P2 with a line width and interval of 2a is solid, so it is 2a in the left and right direction of the drawing. Visually, the fact that there is a misregistration error of
And it can be understood as a concrete number.

This greatly simplifies the management of printing quality as described above.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the printing register target according to the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a plan view showing another embodiment. FIG. 4 and FIG. 5 are partially enlarged views showing a state in which the register targets are superimposed. pi, P2, P3... measurement part.

Claims (1)

[Claims] 1. A measurement part is constructed by arranging a large number of linear stripes of a constant width at intervals equal to the line width, and the line width and spacing are changed in stages. A printing register target formed by forming several sets of measuring parts and juxtaposing these sets of measuring parts. 2. The printing register target according to claim 1, characterized in that the line width and interval steps are integral multiples of the basic dimension. 3. The printing register target according to claim 1, characterized in that the order of juxtaposition of the measurement parts is the same as the order of the line width and spacing steps. 4. The printing register target according to claim 1, characterized in that the direction in which the measurement parts are juxtaposed and the direction of the filaments are at right angles. 5. The printing register target according to claim 1, characterized in that the direction in which the measurement parts are juxtaposed and the direction of the filaments are the same.