JPS5881164A - Method and apparatus for inspecting print - Google Patents

Abstract

PURPOSE:To reliably inspect a print from the first symbol started to be printed by the final printing, by a method wherein counting of read mark pulses is started when a count start mark is sensed after the final printing is started, and the inspection of a symbol is started when a predetermined counted value is reached. CONSTITUTION:Read marks 7A, 7B, 7C... representing the positions of a multiplicity of small sections 4A, 5A, 6A... are put to a web 1 so as to be equal in pitch distribution to each other among sheets 3A, 3B, 3C. Count start marks 10A, 10B, 10C are put to the respective sheets with a pitch equal to the sheet length L0. A pulse is transmitted every time a read mark is detected by a read mark detection means located at a position apart from a symbol inspection means by an integer multiple of the sheet length L0. After the final printing is started, when a count start mark is detected by a count start mark detection means counting of the read mark pulses is started, and the symbol inspection by the symbol inspection means is started when a predetermined pulse number is reached.

Description

[Detailed description of the invention] The present invention applies to lottery tickets, securities, etc.

The present invention relates to a method and apparatus for inspecting a printed matter in which codes such as numbers are printed on each of a large number of small sections distributed in the longitudinal direction on a roll of paper.

When printing this type of printed material, if there is a malfunction or poor adjustment of the printing device, defects such as incorrect numbers such as 1 numbers or half-returns may occur in the printed material, so it is essential to inspect the printed material after printing.

Conventionally, these printed materials have been visually inspected by one person, but such visual inspections not only result in omissions but also are extremely inefficient. In order to eliminate such defects, the code printed on the printed matter is read by photoelectric conversion means, and the corresponding electrical signal is compared with the electrical signal of the standard printed code, and the defect of the wrong number on the printed matter is detected. It is determined whether or not there is one, and the result is displayed or printed on a display, printer, alarm, etc. Automatic inspection methods have been proposed.

In addition, in order to improve the efficiency of printing and inspecting codes, there is a rotary printing method in which designs and codes are printed in multiple five-knit units on one roll of paper, which is then cut into sheets and discharged. It has also been proposed to combine the above automatic inspection methods. In this conventional method, just before printing the necessary code on printed matter, a test print is made with a specific code, and after confirming the printing effect of the code in advance, a book with the necessary code is printed without stopping the printing device. In order to move on to printing, the cam insertion movement is performed, and if the inspection is started based on the signal generated by this movement, the timing of the cam insertion movement is wide, resulting in an error in timing and the sign of the trial printing is incorrect. The code may be read as the actual printing code, or the actual printing code may be Kushiro, which may result in incorrect test results being displayed.

In the present invention, reading marks indicating the position of a small section and a starting mark for pulse counting are provided on the roll paper at predetermined positions without being directly based on the cam insertion operation signal, and the reading sensor senses the reading marks and reads the data. After transmitting a mark pulse and starting one printing, the starting mark is sensed by the starting sensor and counting of reading mark pulses is started, and when the number of counting pulses reaches a predetermined value, code inspection is started. The object of the present invention is to provide a method and apparatus for inspecting printed matter that can reliably perform inspection from the first code printed during actual printing, without the risk of misreading, while eliminating the above-mentioned drawbacks of the conventional method. It is something to do.

The present invention relates to a printed matter inspection method for inspecting the quality of codes printed on a large number of small sections repeatedly distributed with the same pitch distribution for each sheet of a constant sheet length L6 in the longitudinal direction of one roll of paper.

A mark indicating the position of the small section is attached to the paper roll in a manner that corresponds to the code printed on the small section and has the same pitch distribution on each sheet, and one mark is placed on each sheet. Each time a starting mark for counting the pulse count is placed at a pitch equal to the sheet length Lo, and each time the reading mark is detected by the reading mark detecting means located at a position an integral multiple of the sheet length La from the code checking means. When the printing means starts printing the code, a single printing process is started, and then the starting mark is detected by the starting mark detecting means, and the counting mark pulse is started to be read. The method for inspecting printed matter is characterized in that when the number of pulses N is reached, code inspection by the code inspection means is started, and the code inspection is started from the code printed in one printing.

The present invention will be explained with reference to the drawings based on examples.

In FIG. 1(a), 1 is a roll and a sheet of paper, which move in the direction of arrow 2. This paper roll 1 has a large number of small sections 4A, 5A, which are repeatedly distributed with the same pitch distribution in the longitudinal direction for each sheet 3A, 3B, 30 of a constant sheet length La.
6A, 4B, 5B, 6B, 4C, 5C, 6C! , etc.

Codes such as symbols and numbers are printed on each of these four small sections. Since the pitch distribution of each small section in each sheet is the same, the small sections at similar positions on each sheet are arranged at a pitch of the sheet length Lo. For example, 4A.

The distance between each of 4B and 40 and the distance between each of 5A and 5B5C is equal to the sheet length LO.

7A, 8A, 9A #7B, 8B, 9B, 7080.90
etc. are readable marks indicating the position of each subdivision.

The reading marks provided on each sheet are distributed with the same pitch distribution. Moreover, this first small section is the first small section to be printed among the small sections on each sheet.

10A, 10B, 100, etc. are starting marks provided on each sheet, and are located at fixed positions within each sheet, so that the distance between them is equal to the sheet length L(+).

Regarding the process of printing and inspecting such a web 1#
This will be explained using diagram I2.

11 is a feeder that unwinds the web 1 from the roll 12 and supplies it to each of the following processes; 13.14 is a pattern printing unit that prints patterns, starting marks, reading marks, etc.;
Reference numeral 15 denotes a code printing device for printing codes, including a first printing cylinder 16 for printing the first, third, and fifth subdivisions (for example, 4A, 6A, and the next) of each sheet; It has a second printing cylinder 17 for printing large and small sections. 18 is an impression cylinder, and the above-mentioned sheet length L is the circumference of the impression cylinder 18. 19 is a code inspection means such as a television camera linked with a strobe device;
20 is a starting mark sensor that detects a starting mark; 21
is a read mark sensor that senses a read mark and emits a read mark pulse every time a mark is read. 22 is an inspection unit; 25 is a sensor that issues a signal to start printing (for example, an eccentric cam operation sensor); 24
25 is a cutter unit, and 25 is a stacker.

The relative positions of these code checking means, mark sensors, etc. will now be explained with reference to FIG. 1(a).

Code inspection means 19 (three units in this figure) are arranged at a distance of Lm downstream from the first printing cylinder 16 that prints the first small section of the sheet,
! The mark sensor starts from the distance of 20. A reading mark sensor 21 is provided at a distance of L4. . However, the distance L4 is.

L4=kLa (where k is an integer including 0) is selected. In the example shown in this figure, =1.

Further, k may be a negative integer (the reading mark sensor 21 is located upstream from the inspection means 19).

Here, it is assumed that sheet 5 and up to 5B are trial printing, and actual printing starts from sheet 30.

FIG. 11(a) shows the first printing cylinder 16 as a printing means.
This shows the state at the moment when the first actual printing is performed on the row of the first small section 4C of the sheet 5C.

At this time, the starting mark on the upstream side closest to the starting mark sensor serving as the starting mark detection means is 10A, and the distance from the reading mark 9A to the small section 40 at the position of the first printing cylinder 16 is Ll.

A signal is generated by an eccentric cam motion sensor or other means when the main printing is started.

Each time a read mark passes under the read mark sensor 21, a read mark pulse is emitted. As the roll 1 progresses, the starting mark 10A is shown in Fig. 1 (bl).
When it reaches the position of the starting mark sensor 20 and is sensed,
Counting of read mark pulses is started. At this time, the first subdivision @4a, where the actual printing was performed, has not yet reached the code inspection means 19 and is a distance away from the code inspection means 19. This LX is clearly K as shown in the figure.

LX = L> -L wealth It is.

Since the distance L4 to the sensor 21 is set equal to Lo, the reading mark 8A can be read from the reading mark sensor 21.
The distance Ll from the code inspection means 19 to the subdivision 9A is Ls '' Lz, and the positional relationship between the subdivision, the reading mark, and the starting mark in the range of Ls is from the code inspection means 19 to the subdivision 9A.
The state is exactly the same as in the range of Lx between. Therefore, reading mark 8A is reading mark sen? 21, at the same time, the small section 4o on which the first actual printing was performed reaches directly below the code checking means 19. Therefore, after the starting mark is sensed by the starting mark sensor 20.

The read mark sensor detects the number of read marks included in the range Ls, that is, the number of read marks included in the range Ls, that is, the number L downstream from read mark 9A.
If the code checking means 19 is activated and code checking is started when the number Nx (6 in this figure) of reading marks and marks included in the range of z (= Lt - Lz) is counted, the code checking is started by zero printing. The inspection can be reliably started from the printed surface.

The starting mark sensor 20 may be located upstream of the code checking means 19. In that case, the distance @L snow will be a negative value.

That is, in this case, LX=LI + l Lx 1 , and the number of read marks included in the range of Lx downstream from the read mark 9A is Nx.

Note that the number N of reading marks included between the above Lx
X may be determined by counting the number of reading marks that fall within the range of the actual item in the state shown in Figure 1 (bl).

An example of an electric circuit that performs the above operation is shown in FIG. 3, and its output state is shown in FIG. 4.

The electric signal a obtained from the sensor 23 that detects the operation of the eccentric cam for advancing the type wheel of the first printing cylinder 16 is
The electric signal from the starting mark sensor 20 that senses the starting mark is input to the AND gate 26, and its output signal is input to the flip-flop circuit 27. The output signal d is input to the AND gate 28 together with the electric signal C from the reading mark sensor 21, the output signal e is input to the counter 29, the output signal is input to the flip-flop circuit 50, and the output signal f is The output signal g is input to the AND gate 31 together with the signal C from the reading mark sensor 21, and the output signal g is supplied to a strobe device, which causes it to emit light and illuminate the printed surface of one roll of paper 1.

An inspection will be carried out. 66 is a controller.

At the start of actual printing, the signal a from the sensor 23 rises to the H level at time t1 due to the cam operation in the first printing cylinder 16, and the starting mark sensor 20 also rises to the H level at time t1.
3 generates a pulse signal. That is, at time t2, the output signal d of the flip-flop circuit 27 rises to H level.

After that, the output from the reading mark sensor 21)
is supplied to a counter 29 as a pulse e through an AND gate 28 and counted there. When the pulses are counted by a predetermined number N, the counter 29 generates an output signal and supplies it to the flip-flop circuit 30. The output signal f of the flip-flop circuit 30 also rises to H level at this time ts, and the output pulse C of the reading mark sensor 21 is supplied to the strobe device 32 as the output signal g via the AND gate 31, and the pulse g (therefore, the pulse O)
The strobe device emits light in synchronization with K.

In synchronization with the light emission of the strobe device, the code inspection means 19 reads the code on the printed surface. The video signal of the code is input to a test unit 22, such as a computer, and compared with the electrical signal of the corresponding standard code, and the test results are displayed or printed on a display, printer, alarm, etc. When the test is completed, the flip-flop circuits 27 and 50 and the counter 29 are reset by control signals from the controller 53.

According to the present invention, by starting the inspection not directly based on the cam insertion operation signal, it is possible to avoid erroneously reading the code of the trial print or overlooking the code of the actual print to be inspected as in the past. Inspection mistakes can be prevented.

A printed matter inspection method and apparatus that can be easily applied to existing rotary printing presses, that can accurately inspect codes 1 printed at high speed, such as consecutive numbers, as individual numbers, and that can perform highly reliable inspections. This has an extremely effective effect in practical terms.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and FIGS. 1A and 1B show the relative relationship between the printing means, the code inspection means, the starting mark sensor, the reading mark sensor, the printing surface of the web, the starting mark, and the reading mark. An explanatory diagram showing the position, Fig. 2 is a flow diagram of the entire device, Fig. 3 is an electric circuit diagram, and Fig. 4 is a line diagram showing the output state. 1... Roll paper, 2... □ -゛Arrow, 3A, 3B, 30
... Seat, 4A, 4B, 4C... Small section, 5A,
5B, 50... Small section 6A, 6B, 60... Small section, -7A, 7B, 70... Reading mark, 8A
, 8B, 80...reading mark, 9A, 9B, 9
0...reading mark, 10A, 10B, 100...
・Starting mark, 11...feeder, 12...roll. 13.14... Design printing unit, 15... Number printing unit, 16... First printing cylinder, 17... Second printing cylinder. 18... Impression cylinder, 19... Code checking means, 20...
Starting mark sensor, 21...reading mark sensor. 22... Inspection unit, 23... Sensor, 24...
... Cutter unit, 25 ... Stacker, 26.
...and gate, 27...flip-flop circuit. 28...and gate, 29...counter, 30
...Flip-flop circuit, 31...AND gate. 32... Strobe device, 33... Controller. Patent applicant Kyodo Printing Co., Ltd. Hajime Sangyo Co., Ltd. Representative patent attorney Go Hatayama
Thousand 1) Minoru 3

Claims (1)

[Claims] 1. A printed matter for inspecting the quality of codes printed on a sheet with a constant sheet length L in the longitudinal direction of a web, and on a large number of small sections repeatedly distributed with the same pitch distribution. In the inspection method, a reading mark indicating the position of the small section is placed on the roll of paper in a manner corresponding to a code printed on the small section and having the same pitch distribution on each sheet. At the same time, one starting mark (for starting the ruse count) is attached to each sheet at a pitch equal to the sheet length Le,
Each time the reading mark is detected by the reading mark detecting means located at a position that is an integral multiple of the sheet length Le from the code checking means, a reading mark is transmitted. At the time of starting printing of the code by the printing means. After the process is started, the starting mark is detected by the starting mark detecting means to start counting the reading mark pulses, and when a predetermined number of pulses N is reached, the code checking means starts the code checking. A method for inspecting printed matter, characterized in that code inspection is started from a code printed by one printing. 2. At the start of the main printing of the code, the upstream side closest to the starting mark detection means Let Ll be the distance between the starting mark and the reading mark of the first small section after the start of actual printing, and L2 be the distance from the code checking means to the starting mark detecting means (when the starting mark detecting means When it is downstream from the means, Lm) 0
, when Lz(o) is on the upstream side, the first
Let Nx be the number of reading pulses that fall between the reading mark of the subdivision and the distance Lx = L, -'L2.
2. The method according to claim 1, wherein the predetermined number of pulses N is N=Nx. 50 A constant sheet length in the longitudinal direction of the web. In a printed matter inspection device that inspects the quality of codes printed in a large number of small sections that are repeatedly distributed with the same pitch distribution on each sheet. A readable mark indicating the position of the small section is attached to the web so as to correspond to a code printed on the small section and the pitch distribution is the same on each sheet, and one pulse is applied to each sheet. Starting marks for counting are attached at pitches equal to the sheet length Lo K, a transport means for transporting the web, a printing means for printing codes on each of the small sections, and the quality of the printed codes is inspected. a code checking means for detecting the reading mark; and a reading sensor for sensing the reading mark and emitting a reading pulse. a starting sensor that detects the starting mark and starts counting the reading pulses; counts the number of reading pulses, and when a predetermined number N of pulses is reached, starts testing the testing means; 1. A printed matter inspection apparatus, comprising: a counting means for emitting a signal, and wherein the reading sensor is located at a distance that is an integral multiple of the sheet length Lo from the code inspection means.