KR100382630B1 - An apparatus for invalidating a factor printed on a printing carrier - Google Patents

Abstract

The sheet (3) carrying a matrix array of imprints partially surrounds a rotating cylinder (4). A marker (2) is fixed to the moving member of a linear motor (1) and directed at the passing sheet. The imprints are checked by a detector (5) which verifies that any defect has been marked recognisably for purposes of subsequent processing. The marking is started by a signal to the motor to bring the marker to bear upon the sheet, and terminated by a signal for its retraction.

Description

An apparatus for invalidating a factor printed on a printing carrier

The present invention comprises at least one display device for indicating a factor recognized as being flawed by a print quality control system operating the device when a flawed print is passed, .

The invalidation apparatus constituting the invalidation printing apparatus is known from European Patent Specification No. 0,167,196 of the applicant within the scope of the method of handling the printing sheet. According to this method, a printing carrier in the form of a print sheet has an element whose elements are arranged in rows and columns to form a matrix, which is first inspected for recognition of a faulty element. The factors identified as being flawed are marked so that they can be read by the detector. To process them, the printing carrier passes in front of a reading device having as many detectors as the number of columns in order to inspect all the columns. These detectors read the mark on the faulty mark, input the position to the computer, and the position is recorded on the computer. The printing carrier then enters an invalidation printing device which is controlled by the computer and which prints an invalidation stamp on all flawed factors. Next, the printing carrier passes through a numbering machine in which only flawless factors are numbered in order.

Next, the printing carrier is cut to paper and the flawed factors identified by the invalidation impression are removed as misprinted parameters, while the flawless papers are combined in bundle in complete number order. The European Patent Specification No. 0,167,196 does not describe the detailed structure of such an invalidation indicating printing apparatus.

An override device is known from the applicant's European Patent Specification No. 0,440,576, which consists of an ink reservoir in the form of a container and a continuously rotating centrifugal wheel located on the support above the container on a horizontal spindle. The container is vertically movable between a lower position, a rest position and an upper operating position in which the wheel is immersed in ink. The centrifugal wheel is covered by a covering with an opening which may or may not be closed by a movable cover depending on whether the container is in a rest position or not and the printing carrier moves past the opening.

During each printing, the centrifugal wheel is immersed in the ink in the container and ejects the ink onto the printing carrier through the opening in the covering. After a predetermined period of time, the ink layer on the wheel is paired and the device is disassembled for cleaning.

Another known invalidation system is composed of a letterpress printing unit on the print, which displays the letter in the direction perpendicular to the direction of advance of the sheet. The letterpress printing unit is composed of a letterpress printing cylinder having a display head as many as the number of factors on the printed paper and rotating synchronously with the cylinder driving the printed papers. These display heads are mechanically assembled such that the metal rods are actuated by solenoids. When a pulse is sent to the solenoid for marking, the rod is pushed forward and then extends beyond the circumference of the cylinder to be engaged by the mating device and delivers its indentation to the flawed list one after another. The surface area of the rod determines the size of the indicia on the indicia. As the format of the paper changes, it is a difficult task to rearrange all the heads on the cylinder. Such an invalidation system is required to have a useful printing machine in which the machine can be responsible for the ink duct of the letterpress printing unit.

It is an object of the present invention to provide an invalidation apparatus which can prevent the above-mentioned disadvantages in advance and which can perform simple and inexpensive invalidation display on paper.

The present invention avoids the use of potentially harmful solvents, reduces the hassle of daily handling, and limits the possible changes in the indicator, thereby reducing the cost of the apparatus.

Preferably, the linear motor is configured to receive a display start signal and a display end signal that depend on the magnitude of the factor and the advancing speed of the printing carrier from the print quality control system. By adjusting the time between the display start signal and the display end signal, it is possible to adapt the display length over the entire length of the flawed factor and the length of the display with respect to the magnitude of the factor in the movement direction without changing the indicator.

In order to invalidate the factors arranged in the form of a matrix of the columns and columns on the printing carrier in the form of print paper, the number of the display devices is provided by the number of the columns of the number of columns on the printing carrier.

Preferably, a detector is followed by a display device which checks whether the marking line is properly marked with a flawed factor and generates an alarm when this is not done.

Preferably, a standard indicator in which a felt tip is assembled is used. The indicator is fixed to the moving part of the motor so that it can be easily replaced.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

In FIG. 1 there is seen a cylinder 4 rotating in the direction of the arrow, which cylinder is partly surrounded by the printing carrier 3 it carries. The printing carrier includes a plurality of factors arranged in a matrix form. A display unit 2 is fixed to the moving part 1a of the linear motor 1 and these are installed near the outer periphery of the cylinder 4. [ The moving part 1a can move vertically to the printing carrier 3. [ If one of the factors on the printing carrier is recognized as a factor printed incorrectly by the print quality control system, a display start signal is sent to the linear motor 1 so that the linear motor can move the moving part assembled with the display 2 Is pressed against the printing portion on the printing carrier 3 and then the display end signal is sent to the linear motor 1 so that the indicator 2 is retracted from the printing carrier 3. The time of these signals is preferably adjusted or controlled such that the total length of the factor in the advancing direction is invalidated by a single indicator line.

A detector 5 is provided next to the linear motor 1, and the detector checks whether the indication for recognizing a faulty factor is properly completed during the following handling.

2 shows a second embodiment of the override device in which the override device is located on a flat conveyor belt 7 onto which the printing carrier 3 advances at a constant speed.

Figure 3 is a plan view of the system of Figure 2;

The printing carrier 3 has a factor 3a arranged in a matrix of rows and columns. The printing carrier 3 has nine transverse rows and five longitudinal rows, each of which has five linear motors 1 according to the detector 5. In this embodiment, each of the motors 1 is located at the center of the vertical print line corresponding thereto.

Of course, the motor can be located at any point along the width of the corresponding plot line.

The printing carrier 3 is moved in the direction of the arrow by the plane conveyor belt 7. The erroneously printed factors are indicated by a mark 6 parallel to the advancing direction of the printing carrier 3.

The indicator 2 is fixed to the moving part of the linear motor 1 so that it can be easily replaced.

Generally, the indicator 2 is at an acute angle with the printing carrier 3, which angle is preferably 90 [deg.] As shown in FIG.

In general, the invalidation system can be used for individual sheets already cut to format. Furthermore, it is applicable to invalidating any factor. If there are many vertical and horizontal print columns, the number of linear motors is the same as the number of vertical print columns in addition to the display.

The term linear motor means an electrical, electromagnetic, pneumatic or hydraulic actuator, or other type of actuator, which drives the element to a solid displacement. This may in particular be a cylinder actuator, a pneumatic or hydraulic double acting piston, an electric motor, or an electromagnet.

FIG. 1 is a side view of the first embodiment; FIG.

FIG. 2 is a side view of the second embodiment. FIG.

FIG. 3 is a plan view of the second embodiment; FIG.

Description of the Related Art [0002]

1: Linear motor 1a:

2: Indicator 3: Printing carrier

4: cylinder 5: detector

6: Indication line

Claims (9)

(1) (2) displaying a factor (3a) recognized as being flawed by a print quality control system operating the device when a flawed print passes, wherein the moving printing carrier The display device 1 or 2 includes a fixed linear motor 1 and a display 2 fixed to the moving part of the linear motor 1. The linear motor 1 is fixedly mounted on the display device 1, Characterized in that the moving part is movable between a rest position and an operative position in which the flawed factor (3a) is contacted, and the moving direction of the moving part forms an angle with the moving direction of the printing carrier. 3. The printing apparatus according to claim 1, wherein the linear motor (1) is configured to receive a display start signal and a display end signal depending on the magnitude of the factor (3a) and the advancing speed of the printing carrier (3) Characterized in that. The apparatus according to claim 1, wherein the angle between the moving direction of the moving part of the display device (1) (2) and the moving direction of the printing carrier (3) is 90 °. 2. The printing apparatus according to claim 1, characterized in that in order to invalidate a factor (3a) arranged in the form of a matrix of rows and columns on the printing carrier (3) in the form of print paper, 3). ≪ / RTI > 2. The printing apparatus according to claim 1, further comprising one or more detectors (5) installed next to the display device (1) (2) in the advancing direction of the printing carrier (3) (6) is properly printed, and generates an alarm when the indication line (6) is not attached. The device according to claim 1, characterized in that the indicator (2) is assembled with a felt tip. The device according to claim 6, characterized in that the indicator (2) is fixed to the moving part of the linear motor (1) so that it can be easily replaced. A device according to claim 1, characterized in that it is mounted on the periphery of a cylinder (4) surrounded by the printing carrier (3). A device according to claim 1, characterized in that it is mounted on a plane conveyor belt (7) carrying the printing carrier (3).