JP2001071282A - High response marking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical marking device being excellent in maintainability, and using a commercially available marker pen to precisely mark a flaw generated on a metal material on a line or the like requiring a tracking a marking and a high response. SOLUTION: This device comprises a pen holder 2 to which a marker pan 4 is attached, a pen holder lifting mechanism lifting the pen holder 2 along with the marker pen 4, a protecting cap 15 which protects the pen tip of the marker pen 4, and opens/closes, and a shutter 8 opening/closing the protecting cap 15 in conjunction with the pen holder lifting mechanism. This device conducts a tracking from a marking command input point to a making point, and pressing the marker pen 4 to a part to be marked for marking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed response marking for marking a flaw or a unique portion of a metal material with a commercially available marker pen in a continuous production line of a metal material such as a thin steel plate. It concerns the device.

[0002]

2. Description of the Related Art In a continuous production line of metal materials such as thin steel sheets, devices such as an ink jet printer device and an ink dot marking device are commercially available as a means for marking a flaw or a unique portion generated in a metal material. ing.

When an ink jet printer is used, a special ink is required due to restrictions such as charging of the ink, and the type and color of the ink are naturally limited. However, when the metal material to be manufactured is a steel plate for automobiles or the like, the performance and color of the ink may be specified for the convenience of customer inspection.

For example, if there are various restrictions on the ink, such as being excellent in quick-drying properties after coloring, not bleeding even when applied with oil, and being blue, etc. Special inks must be developed to meet the conditions, and the development of these inks requires enormous number of days and costs, making it difficult to respond realistically.

[0005] Further, since it is necessary to keep the ink jetting section clean at all times, considerable cost and time are required for its maintenance. As described above, when an ink jet printer is used, a special ink has to be used, so that the color and type of the ink cannot be easily changed.

[0006] As an apparatus capable of solving the above-mentioned problem and automatically marking using a commercially available felt-tip pen or the like, Japanese Utility Model Laid-Open No. 3-39143 discloses a flaw detector for detecting a defective portion of a traveling metal material. In a device for marking the vicinity of a defect, a marking pen is attached to a slide guide, a valve opening / closing mechanism is provided inside the marking pen, the pen body is separated from a metal material during standby, and the valve mechanism is closed. There is disclosed a marking device (hereinafter referred to as Prior Art 1) in which a body is pressed against a metal material to open a valve mechanism.

In Japanese Patent Publication No. 60-19831, a first driving means (rotary solenoid) and a second driving means (solenoid) for holding a marking pen movably on a reading head and driving the marking pen are provided. 1
A marking device (hereinafter referred to as prior art 2) that drives a marking pen from a first standby position to a second standby position by a driving unit and drives the marking pen from the second standby position to a marking position by a second driving unit. Have been.

In Japanese Patent Publication No. 57-27771, a pen holder in which a marking pen is detachably held is attached to a cylindrical member of a marking head movably supported, and the pen holder is pressed by a fluid pressure device. A marking device (hereinafter referred to as Prior Art 3) is disclosed in which a cap for closing and holding a tip of the marking pen is provided so as to be openable and closable while sucking the marking pen into and out of the cylindrical member.

Further, according to Japanese Patent Publication No. 7-36003, a flaw is tracked and marked, and the flaw is tracked. When the flaw reaches the mark sensor by the mark sensor, the acceptability is determined within a range of ± L. are doing. In this method, when there is a long flaw, the determination is made only with respect to the tip. That is, Japanese Patent Publication No. 7-36003 is understood to mark only the tip of the flaw.

Although the contents of the judgment logic are not specified, 1) judgment only as to whether or not the mark is within the operation range (± L) of the mark sensor, or 2) operation range of the mark sensor In general, evaluation is made based on the ratio of the mark within (± L).

However, in the case of 2), for example, when the flaw position tracking slightly changes, the ratio occupied by the marks changes, and accurate pass / fail judgment cannot be made.

Further, the marking length is not set when a long flaw exists. (Hereinafter referred to as Prior Art 4).

[0013]

According to the prior art 1,
Liquid ink is sealed in the barrel, and at the time of marking, an appropriate amount of ink is sent to the pen body. In the method of feeding such liquid ink to the pen body, the moving speed is variable at high speed ( In a continuous production line of thin steel sheets or the like having a pressure of 0 to 600 mpm), practical use is difficult due to problems such as liquid leakage and blurring of ink.

In the marking device, since the slide guide on which the marking pen is attached is connected to the solenoid (electromagnetic type), the tip of the pen is worn out by the downward impact of the pen, or the marked thin steel plate has a concave shape. However, it cannot be put to practical use in a continuous production line for thin steel sheets or the like that change at high speed, and the line speed and the pen operation are not synchronized.

According to Prior Art 2, by lowering the first stage rotary solenoid at a high speed and lowering the second stage solenoid at a low speed, the pen tip strongly hits the plate surface and its life is shortened. However, if tracking and high-speed marking are required in a continuous production line for thin steel sheets with a thickness of 0.4 to 3.0 mm that can be varied at high speed, it is difficult to put it into practical use. .

The prior art 3 is a device for writing characters on the outer periphery of a metal strip that is stationary or moving at a low speed off-line. Can not be used because of the problem.

According to Prior Art 4 (Japanese Patent Publication No. 7-36003), even when a long flaw exists, marking is performed only at the tip of the flaw, so that the user can know the position, but which area is defective. Cannot be recognized. Therefore, the range of the defective portion must be visually determined. Also, if the cutting process of the defective part could not be performed reliably,
There are problems such as causing a press trouble in a later process.

Although the contents of the judgment logic are not specified, there is a problem that it is not possible to judge the quality correctly when the flaw position tracking slightly changes.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to mark flaws, unique parts, and the like of a metal material detected by an inspection device in a continuous metal material production line, in the next step or in a customer. At the time of the previous inspection, flaws and unique parts can be easily recognized, marking can be easily performed using a commercially available marker pen, etc., regardless of the type and color of the ink, and the drop impact of the pen The pen tip will not be worn out, and the marked metal material will not be damaged, so it can be applied to lines that require marking tracking and high-speed response to remove flaws and unique parts etc. An object of the present invention is to provide an inexpensive and economical high-speed response marking device which can perform accurate marking, and which has excellent maintainability and is inexpensive.

[0020]

According to the first aspect of the present invention,
A marking device for marking a flaw portion or a unique portion of an object to be inspected detected by an inspection device, wherein the marking device is a pen holder to which a marker pen is detachably attached, and for raising and lowering the pen holder together with the marker pen. A pen holder elevating mechanism, an openable and closable protection cap for protecting the pen tip of the marker pen, and a shutter mechanism for opening and closing the protection cap in conjunction with the pen holder elevating mechanism.

According to a second aspect of the present invention, there is provided a marking device for marking a flaw or a unique portion of a metal member detected by an inspection device in a continuous production line of a metal material,
The marking device includes a pen holder to which a marker pen is detachably attached, a pen holder lifting mechanism for raising and lowering the pen holder together with the marker pen, an openable / closable protection cap for protecting a pen tip of the marker pen, and the pen holder. A shutter mechanism for opening and closing the protective cap in conjunction with a lifting mechanism.

The invention according to claim 3 is characterized in that a marking receiving roll is disposed on the surface of the metal material to be marked, which is opposite to the pen tip of the marker pen, on the surface opposite to the surface to be marked. Things.

The invention according to a fourth aspect is characterized in that the pen holder has a mechanism for controlling the pressing pressure of the marker pen.

The invention according to claim 5 is characterized in that a marking point tracking mechanism is provided so as to automatically mark the detected flaw portion or unique portion of the metal material. is there.

According to a sixth aspect of the present invention, in order to perform marking following the marking point of the metal material, the lifting mechanism of the pen holder is a lifting mechanism of at least two stages of low speed lifting and high speed lifting. In particular, it has features.

According to a seventh aspect of the present invention, there is provided an image capturing camera for capturing a marking image marked on the metal material, and an illuminating device for illuminating the marking point.
It is characterized in that it has a judgment logic for judging the quality of marking based on a marking image signal picked up by the image taking camera.

According to an eighth aspect of the present invention, the image capturing camera captures an image of a marking area including a flaw, a unique part, and areas before and after the flaw, a unique part, and an area before and after the marking area. Thus, it is characterized in that the quality of the marking can be determined even when the tracking of the marking position slightly changes.

According to a ninth aspect of the present invention, there is provided a monitor device for monitoring an output of an image capturing camera for capturing a marking image.

According to a tenth aspect of the present invention, the marker pen has an evacuation function, and the marker pen is used when a part that damages the marker pen, such as a hole in the metal material, a flaw, a weld, or the like passes. Is characterized in that it can be evacuated.

An eleventh aspect of the present invention is characterized in that a dryer for drying the mark ink after marking with a marker pen is provided.

According to the apparatus of the present invention, when a marking command is issued to a flaw or a unique portion of a metal material such as a thin steel plate, the command is input to the control device, and the marking point is input from the marking command input point to the marking point. The pen is opened before the required marking point, and the marking pen is lowered to the standby position. Immediately before the marking point passes just below the marking pen, the marking pen is pressed against the marked portion of the metal material to perform marking.

At the end of marking, the marking pen is returned to its original position, and the pen is covered with the pen cap to prevent the marking pen from drying. Therefore, the present invention can be applied to a line that requires marking tracking or high-speed response, and can accurately mark a flaw or a unique portion generated in a metal material.

According to the present invention, not only the flaw position is displayed to the user, but also a mark is provided so as to cover the flaw portion. Since this mark range is specified, the user can determine which range is defective. The part can be easily recognized. Therefore, the cutting process of the defective portion can be reliably performed, and troubles in a later process can be avoided.

The marking is performed on the marking area (α1 + flaw length + α2) including the flaw portion with respect to the position and length of the flaw, and does not track the flaw portion. The marking area information is received from the upper flaw detector, and the marking area is tracked.

The mark sensor takes in marking results within a range (α3 + marking area + α4) longer than this marking area (α1 + flaw length + α2),
Mark sensor operating range (α3 + marking area + α
The evaluation is made based on the ratio of the mark in 4). Therefore, even if the flaw position tracking slightly changes, the quality of the marking can be determined without any problem.

The present invention can be applied not only to metal materials but also to other test objects, for example, paper, film, rubber, vinyl chloride, cloth and the like.

[0037]

Next, an apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic vertical sectional view of the device of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof.
As shown in the drawings, the marking device 23 of the present invention comprises:
A cylindrical pen holder 2 supported by a slide table 10, a marker pen 4 removably inserted into the pen holder 2, and a marker table 4 for raising and lowering the marker pen 4 with the pen holder 2 at high speed by the slide table 10.
A fluid pressure cylinder 5 as a pen holder elevating mechanism provided on the support plate 11 and a rack as a pen holder elevating mechanism for moving the slide table 10 supporting the pen holder 2 at low speed along the support plate 11. A protective cap 15 having an openable and closable opening for protecting the pinion 6 and the elevating motor 12, and a pen tip of the marker pen 4;
An opening 5 is provided with a shutter 8 which automatically opens and closes in conjunction with driving of a fluid pressure cylinder 5 and a rack and pinion 6 which are pen holder elevating mechanisms.

The pen holder 2 is a cylindrical body whose upper end is closed and whose lower end is open, in which the marker pen 4 has its pen tip 9 protruding from the lower end opening surface of the pen holder 2 so as to be detachable. It is inserted in. Marker pen 4
Is locked by a spring 3 attached to the upper surface of the pen holder 2, and its pressing pressure is adjusted. As the marker pen 4, a commercially available marker pen is used without depending on the color and type of the ink, and the marker pen 4 can be easily attached and detached.

The slide table 10 to which the pen holder 2 is attached is guided by a guide 14 formed on the support plate 11 and moves up and down at a high speed by the operation of the fluid pressure cylinder 5. A rack 6 a is provided on one end surface of the support plate 11, and the rack 6 a is engaged with a pinion 6 b rotated by a motor 12 provided on the main body 13. Therefore, the support plate 11 is guided by the guide plate 14 'by the rotating pinion 6b and moves up and down at a low speed.

As described above, the pen holder 2 and the marker pen 4 are moved up and down in two steps at a low speed by the rack and pinion 6 and at a high speed by the fluid pressure cylinder 5, so that the marking operation can be performed quickly.
The pen tip of the marker pen 4 is not damaged. The pen holder raising and lowering mechanism has two stages of the above-mentioned low-speed raising and lowering and high-speed raising and lowering.
Alternatively, a three-stage or more lifting mechanism may be used. The spring 3 that locks the fluid pressure cylinder 5 and the marker pen 4 to the pen holder 2 also has a function as a mechanism for adjusting the pressing force of the marker pen 4.

The protective cap 15 has a cylindrical shape with an open upper end, and has an inner diameter substantially equal to the outer diameter of the pen holder 2, and the lower part of the pen holder 2 is fitted together with the marker pen 4. An opening is formed on the bottom surface of the protective cap 15 so that the lower portion of the pen holder 2 can protrude and retract together with the marker pen 4. A shutter 8 having an opening 8a having substantially the same diameter as the above opening for opening and closing this opening is provided. The shutter cylinder 7 is provided so as to be horizontally movable. Reference numeral 16 denotes a bush attached to the inner peripheral surface of the protective cap 15, and reference numeral 17 denotes a sealing material attached to the upper opening peripheral edge.

The shutter 8 is horizontally moved by the shutter cylinder 7 and its opening 8a is aligned with the bottom opening of the protective cap 15, so that the nib 9 of the marker pen 4 is moved together with the pen holder 2 into the opening 8 of the shutter 8.
a, and the tip 8 of the marker pen 4 can be protected by closing the bottom opening of the protective cap 15 with the shutter 8. The opening and closing of the opening of the protection cap 15 by the shutter 8 is incorporated in a sequence so that the opening and closing of the opening of the protection cap 15 are automatically performed in conjunction with the fluid pressure cylinder 5 and the rack and pinion 6 as a pen holder elevating mechanism.

In FIG. 1, reference numeral 18 denotes a sensor for confirming the elevation of the pen holder 2. In FIGS. 2 and 3, reference numeral 30 denotes a CCD camera provided in the main body 13 for capturing a marking image. Reference numeral 31 denotes an illumination device for the marking unit.

FIG. 4 is a schematic view of a thin steel sheet production line on which the apparatus of the present invention is installed. As shown in the drawing, a flaw inspection device, a width inspection device, and a thickness inspection for detecting a flaw or a unique portion of the thin steel plate 1 along a moving line of the thin steel plate 1 that moves continuously in the direction of the arrow. Inspection device 2 such as device
0, input switch 2 for manual marking designation
1. Marking control device 22 and marking device 23
Is provided.

A marking receiving roll 25 is provided below the marking device 23 on the opposite side of the marked surface of the thin steel plate 1 so as to face the pen tip 9 of the marker pen 4. Such a marking receiving roll 25 prevents the tip of the marker pen 4 from being worn due to the downward impact of the marker pen 4 at the time of marking, and the occurrence of scratches on the surface of the marked thin steel plate 1 is prevented.

The thin steel sheet 1 detected by the detecting device 20
The signal of the flaw or unique part, or the marking designation signal from the input switch 21 is sent to the marking control device 22. The marking control device 22 receives a tracking pulse from the line tracking pulse generator 24 and tracks a position to be marked on the thin steel plate 1. The marking device 23 receives a marking command as a result of tracking from the marking control device 22 and performs marking on a flaw or a unique portion of the thin steel plate 1.

Next, the operation of the apparatus of the present invention will be described with reference to FIGS. From the marking control device 22,
A marking standby command is output a few meters before the designated marking point on the thin steel sheet 1. In response to this standby command, the elevation motor 12 of the marking device 23 is driven, and the slide table 10 to which the pen holder 2 is attached at the storage position in FIG. 5A is moved as shown in FIG. 5B. The rack and pinion 6 lowers the support plate 11 of the slide table 10 at a low speed so that the nib 9 of the marker pen 4 projects from the opening of the protective cap 15 and is located at the standby position. The cylinder 7 is automatically operated, the shutter 8 is moved, and the opening of the protective cap 15 is opened.

Next, based on the marking command from the marking control device 22, the fluid pressure cylinder 5 is operated to move the pen holder 2 supported by the slide table 10 to the lower limit position as shown in FIG. It descends at high speed and marks the thin steel plate 1.

The marking command from the marking control device 22 is a gate signal, and performs marking while the gate is open. When the gate signal is released, the pen holder 2 is raised by the operation of the fluid pressure cylinder 5 to be in a standby state.

When there is no next marking command, the elevating motor 12 is operated to raise the support plate 11 on which the pen holder 2 is mounted to the storage position shown in FIG. Is operated to close the opening of the protective cap 15 with the shutter 8 to prevent the nib 9 of the marker pen 4 from drying out.

Even during such a series of operations,
When the next marking command is received, marking can be immediately performed by the logic of the marking control device 22.

The marking pressing pressure is determined by the state of the pen tip,
Since it cannot be unambiguously determined from the ink filling state or the like, control is performed by adjusting the tension of the spring 3 or the pressure of the fluid pressure cylinder 5 in consideration of this.

Since the occurrence of blurring of the marking is expected, a marking recognizing device such as the CCD camera 30 is provided, and the logic for judging the quality of the marking is incorporated in the marking control device 22.
As the image capturing camera, the above-described CCD camera, linear ray camera, or the like can be used.

FIG. 6 shows the ink marked immediately after the marking (hereinafter referred to as “mark ink”) in the apparatus shown in FIG.
FIG. 2 is a schematic diagram showing a state in which a dryer 32 for drying the same is installed. By installing the dryer 32 as shown in FIG. 6, it is possible to effectively dry the mark ink immediately after marking, and to prevent ink transfer or the like in a later step. Of course, immediately after marking is preferable, but it may be before or after the camera. In any case, it suffices after marking.

FIG. 7 is a drawing showing a marking state on a thin steel plate, and corresponds to actual markings and marking diagrams. As shown in FIG. 7, depending on the vertical movement of the moving thin steel plate, the state of the pen tip of the marker pen 4, and the like, the originally continuous marking lines become A1, A2, and A3.
B2 and B3 are separated by an interval, and before and after B1,
As shown in B4, the marking becomes thin or a part that is not marked occurs due to the touch delay of the marker pen 4.
X1 and X2 are dead zones.

Then, a marking image of the marking range H is picked up by a CCD camera and the marking control device 2
The marking control device 22 determines whether the marking is good or bad according to the following equation.

(A1 + A2 + A3) / {H− (X1 + X2)} ≧ S1 An: range in which the marking was recognized Bn: range in which the marking was not recognized Xn: dead zone Sn: constant for determining the quality of the marking Actual scratch length on the steel plate The area to be marked with respect to Ld is (α1 + flaw length + α2), and a marking gate signal is output.

On the other hand, the range in which the mark sensor gate signal is further added with α3 and α4 is the operation range. That is, the mark sensor gate signal has a range obtained by adding (α1 + α2 + α3 + α4) to the actual flaw length Ld.

Further, in order to correct the difference in the surface state of the thin steel sheet 1, the output signal threshold value of the CCD camera is set from the upper level for each type of the thin steel sheet and the quality of the marking is determined. These are the logics for judging pass / fail from the portion of the marking gate signal excluding the dead zone and the ratio of the marking detection portion.

Although not shown, the output of the CCD camera can be constantly monitored by installing a monitor for monitoring the output of the CCD camera in the present apparatus.

Further, by providing the marker pen with an evacuation function, when a special part such as a hole, a turn-up flaw, or a welded part that damages the marker pen passes, the marker pen is temporarily evacuated to prevent damage. It can avoid and protect the device.

In this embodiment, the description has been given of the metal material. However, other objects to be inspected, such as paper, film, rubber,
It can be applied to vinyl chloride, cloth, and the like.

[0063]

As described above, according to the present invention,
For coils, etc. that are shipped through a continuous production line for metal materials such as thin steel sheets, the flaws and unique parts detected by inspection equipment such as flaw inspection equipment, width inspection equipment, and thickness inspection equipment installed in the line Marking can be performed automatically, thereby facilitating recognition of a flaw or a peculiar part at the next step or at the time of inspection at a customer, and automatic removal of the flaw or peculiar part. Further, it can be widely applied to paper, film, rubber, vinyl chloride, cloth, and the like of other test objects. Furthermore, since a commercially available marker pen or the like can be easily attached and detached without sticking to the type and color of the ink,
Industrially useful effects such as excellent maintainability, inexpensiveness and economical effects are brought about.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view of the device of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a schematic side view of FIG. 1;

FIG. 4 is a schematic view of a thin steel sheet production line on which the apparatus of the present invention is installed.

FIG. 5 is a diagram showing an operation state of the device of the present invention.

FIG. 6 is a schematic diagram of a thin steel sheet production line in which the apparatus (including a dryer) of the present invention is installed.

FIG. 7 is a diagram showing a marking state on a thin steel plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin steel plate 2 Pen holder 3 Spring 4 Marker pen 5 Fluid pressure cylinder 6 Rack pinion 7 Shutter cylinder 8 Shutter 9 Pen tip 10 Slide table 11 Support plate 12 Lifting motor 13 Main body 14 Guide plate 15 Protective cap 16 Bush 17 Seal 18 Sensor 20 Inspection device 21 Manual input switch 22 Marking control device 23 Marking device 24 Pulse generator for line tracking 25 Marking receiving roll 30 CCD camera 31 Illumination device 32 Dryer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Akira Kazama, Inventor 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Yasuo Kushida 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan Inside Honko Co., Ltd. (72) Inventor Kazu Tanaka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Inventor Shuichi Harada Fukuyama Kyoki Co., Ltd.

Claims (11)

[Claims] 1. A marking device for marking a flaw or a singular part of an object to be inspected detected by an inspection device, the marking device comprising: a pen holder to which a marker pen is detachably attached; A pen holder elevating mechanism for raising and lowering with the pen, an openable and closable protection cap for protecting the pen tip of the marker pen, and a shutter mechanism for opening and closing the protection cap in conjunction with the pen holder elevating mechanism are provided. High-speed response marking device. 2. A marking device for marking a flaw or a unique portion of a metal member detected by an inspection device in a continuous production line of metal material, wherein the marking device comprises a pen holder to which a marker pen is detachably attached. A pen holder elevating mechanism for elevating the pen holder together with the marker pen, an openable / closable protection cap for protecting the pen tip of the marker pen, and a shutter mechanism for opening / closing the protection cap in conjunction with the pen holder elevating mechanism. A high-speed response marking device comprising: 3. The marker pen is opposed to a pen tip of the marker pen,
On the surface opposite to the surface to be marked of the metal material to be marked,
Apparatus according to claim 2, wherein a marking receiving roll is arranged. 4. The apparatus according to claim 2, wherein the pen holder has a pressing pressure control mechanism for the marker pen. 5. A marking point tracking mechanism is provided to automatically mark a detected flaw or singular part of the metal material.
An apparatus according to claim 1. 6. The pen holder raising and lowering mechanism comprises at least two stages of low-speed raising and lowering and high-speed raising and lowering in order to perform marking following the marking point of the metal material. An apparatus according to claim 4 or 5. 7. An image capturing camera for capturing a marking image marked on the metal material, and an illuminating device for illuminating the marking point, wherein the marking is performed by a marking image signal captured by the image capturing camera. 7. The apparatus according to claim 2, further comprising a determination logic for determining pass / fail. 8. The image taking camera captures an image of a marking area including a flaw or a unique part and areas before and after the flaw, and an area before and after the marking area. The apparatus according to claim 7, wherein the quality of the marking can be determined even when the tracking slightly changes. 9. The apparatus according to claim 7, further comprising a monitor device for monitoring an output of an image capturing camera that captures a marking image. 10. The marker pen has an evacuation function,
The marker pen can be retracted when a part of the metal material that scratches the marker pen, such as a hole in the metal material, a flaw, a weld, or the like, passes.
10. The apparatus according to 6, 7, 8 or 9. 11. The apparatus according to claim 2, further comprising a dryer for drying the mark ink after marking with the marker pen.